EP2424420B1 - Dishwasher and circulation pump having a water distribution system - Google Patents

Description

The invention relates to a dishwasher, in particular a domestic dishwasher. The invention also relates to a circulating pump with a water diverter for a dishwasher, in particular for a domestic dishwasher.

The DE 101 33 129 A1 discloses a dishwasher with a circulation pump having an intake manifold, an impeller and at least two separate discharge nozzles on the pump housing for acting on the spray arms of the dishwasher with rinsing liquid. The dishwasher further comprises a pump pressure side arranged in the water flow of the dishwasher and integrated into the circulation water diverter, by means of which the rinsing liquid is the spray arms selectively fed.

A comparable solution shows the EP 1 502 535 A2 , The water switch consists in this case of a cylindrical wall, which serves to receive a rotatable relative to the wall body of revolution. Since both the wall and the rotary body have various openings which are aligned in certain positions of the rotating body, the feed of the pipes connected to the water separator can be controlled by the choice of the angle of rotation.
The object of the invention is to provide an improved circulation pump with a water switch.

The object of the invention is achieved by a circulating pump with a water diverter for a dishwasher, in particular for a domestic dishwasher, comprising a pump housing with a first outlet, in which the water diverter is arranged.

A further aspect of the invention relates to a dishwasher, in particular a domestic dishwasher, comprising a rinsing container, a first spraying device arranged inside the rinsing container, a second spraying device arranged inside the rinsing container, a circulating pump for conveying rinsing liquid to the spraying devices and a water diverter which is set up, To open and close supply sections to the spray, the circulation pump and the Water switch is designed as a circulation pump according to the invention with water switch.

Dishwashers, especially household dishwashers have a circulation pump, which is provided to promote rinsing liquid, which is commonly referred to as rinsing liquor, to the spray devices. The circulation pump has an outlet in its pump housing, through which the rinsing liquid is conveyed out of the circulation pump. It may also be provided that the rinsing liquid is to be conveyed alternately to the spraying devices, for which reason dishwashing machines optionally have a water diverter, e.g. is arranged to guide the rinsing liquid alternately to the spray devices. According to the water diverter is arranged in the outlet of the circulation pump, whereby the combination of circulation pump and water diverter can be performed relatively space-saving.

In order to make the preparation of the circulation pump according to the invention with water switch relatively easy, according to the invention, the water switch is formed as an insert, which is in the first output. Then needs to be inserted as an insert waterway only to be plugged into the first output for mounting.

This can be done particularly easily if, as provided according to the invention, the first outlet is designed as a first outlet nozzle.

The first output can be arranged advantageously a pump cover of the pump housing. Then the pump cover with mounted water switch can be conveniently connected to the rest of the housing.

The water switch may preferably have a wall closing off the first outlet with a first opening and having a second opening and a closing means mounted in particular on the wall of the water distributor, which is arranged to open the first opening in a first position and to close the second opening and in a second position to close the first opening and the first opening to open. The first opening communicates, for example, with one of the spraying devices, in particular via their relevant supply line section, and the second opening communicates, for example, with another spraying device, in particular via its relevant supply line section. In order, for example, to alternately convey the rinsing liquid to the spraying devices, the closing means, which is designed, for example, as a turntable, is provided.

The closure means may preferably be arranged on the side of the wall of the water diverter facing away from the interior of the circulating pump and / or have a play in the direction perpendicular to the wall of the water diverter. During operation of the circulation pump according to the invention, the closing means is pressed against the supply line section to be closed, in order to prevent a delivery of washing-up liquid to the relevant spraying device.

In order to move the closing means back and forth between its two positions, the water diverter may advantageously comprise an actuator which is arranged to move the closing center back and forth between the first position and the second position.

According to a variant of the circulation pump according to the invention, the actuator can preferably be arranged outside on the pump housing and move the closing means by means of a plunger coupled to the closing means. Such an embodiment can be realized relatively easily. The actuator can be designed, for example, as an electric coil arranged on the pump housing.

According to a further expedient embodiment of the circulating pump according to the invention, the pump housing has a second outlet which communicates with the second opening. The second output is connected, for example, to the supply line of one of the spray devices. This can be e.g. relatively easily realized, if the second output is formed as a second output nozzle, since then the relevant supply line, for example. only needs to be plugged onto the second outlet nozzle.

The second output may preferably be arranged in the wall of the first output formed as a first outlet nozzle. This allows a relatively compact design of the circulation pump according to the invention.

The water switch has, according to an expedient embodiment of the circulation pump according to the invention a tubular connection which is connected to the second output and communicates with the second opening. The tubular connection can preferably be integrally formed or einstoffig on the wall of the water switch be. The tubular connection allows in a relatively simple manner a promotion of rinsing liquid from the second opening to the second outlet of the circulation pump. According to a further expedient variant of the circulation pump according to the invention, the second opening facing the end of the tubular connection ends spaced from the wall of the water switch. Then it is possible that the closing means has a game in a direction perpendicular to the wall of the water switch, the closing means should be arranged on the side facing away from the interior of the pump housing side of the wall of the water switch.

The closing means may also comprise the game if, according to an expedient embodiment of the dishwasher according to the invention, the supply line section assigned to the first spraying device ends at a distance from the first opening of the water separator. Since the first outlet is designed as the first outlet nozzle, the feed line section assigned to the first spray device can project into the first outlet nozzle of the circulation pump. The circulating pump according to the invention can be used advantageously in particular if there is not enough space between a conventional circulating pump and a pump, e.g. formed as a lower spray arm spray device is present. Due to the circulation pump according to the invention, the water switch is advantageously laid in the pump housing or optionally integrated in the pump cover.

Depending on the embodiment, the output range of the circulation pump according to the invention is increased in diameter compared to a conventional circulation pump. If necessary, the connection piece for the upper spray arm is located in this area. Optionally, the trained as insert water diverter, which includes, for example, the connection to the nozzle, as well as the storage of the turntable (in general: closing means), inserted in the enlarged area. Then the turntable, which in particular has vertical play, for example, snapped. Externally on the pump housing, an actuator / coil is optionally attached, which moves a plunger, in which a driver of the turntable is guided.

The function of the water circulation circulation pump according to the invention can be designed in particular as follows:

At rest, the turntable closes the access to the upper spray arm. The turntable has vertical play and is pressed by the pump pressure to the respective access and closes it. When the actuator is actuated, the turntable moves, exposing access to the upper spray arm and closing access to the lower spray arm. When switching off the turntable is rotated to its original position.

As a result, a relatively simple cost-effective circulation pump with water separator is created.

Other developments of the invention are given in the dependent claims.

Fig. 1

eine Haushaltsgeschirrspülmaschine mit einer Umwälzpumpe, in der eine Wasserweiche der Haushaltsgeschirrspülmaschine nach dem erfindungsgemäßen Konstruktionsprinzip angeordnet ist, und

Figuren 2 und 3

Teilansichten und Betriebszustände der Umwälzpumpe der Haushaltsgeschirrspülmaschine von Figur 1 mit Wasserweiche.

An embodiment of the invention is illustrated by way of example in the accompanying schematic drawings. Show it:

Fig. 1

a domestic dishwasher with a circulating pump, in which a water diverter of the domestic dishwasher is arranged according to the construction principle according to the invention, and

FIGS. 2 and 3

Partial views and operating conditions of the circulating pump of the household dishwasher of FIG. 1 with water switch.

Elements with the same function and mode of action are in the FIGS. 1 and 3 each provided with the same reference numerals.

The Fig. 1 shows a household dishwasher 1 in a schematic representation. The household dishwasher 1 comprises a washing container 2 for receiving items to be washed, eg soiled dishes and cutlery, which is classified, for example, in dishes and baskets not shown in detail. In the washing container 2 are at least two spray devices for applying the washware with a liquid arranged, which are formed in the case of the present embodiment as the lower and upper spray arms 3, 4.

The liquid, which is usually referred to as rinsing liquor, is heated in the case of the present embodiment, at least in a partial program step of a washing program of the household dishwasher 1 by a continuous flow heater not shown. The rinse program runs on a control device, not shown in detail, e.g. a suitable electronics comprising a microcontroller or a microprocessor.

Furthermore, the domestic dishwasher 1 has a below the flushing floor or the washing tub 9 of the washing compartment 2 arranged circulation pump 10, of which the Figures 2 and 3 Show partial views. The circulation pump 10 is driven for example by means of an electric drive, not shown in detail, in particular by means of its electric motor, for example via a shaft, not shown, and is set up via a first liquid supply line 6 to the lower spray arm 3 and a second liquid supply line 7 to the upper spray arm 4, the liquid to promote from the interior of the washing compartment 2. This is illustrated by arrows 8. The electric drive is connected to the control device.

In the case of the present embodiment, the circulation pump 10 in the Figures 2 and 3 partially shown pump housing 11 with a pump cover 12. The pump housing 11 has an inlet connection, not shown, through which the liquid can pass into the interior of the circulating pump 10.

The circulation pump 10 further has a first output port 13 formed as the first output and a second output port 14 designed as the second output. The two outlet ports 13, 14 are in the case of the present embodiment, the pump cover 12 in particular integrally formed or einstoffig. In the case of the present embodiment, the second outlet port 14 is formed on the wall 13a of the first outlet nozzle 13.

The second outlet port 14 is connected to the second fluid supply line 7, so that the funded by the circulation pump 10 fluid via the second outlet port 14 and the second fluid supply line 7 can reach the upper spray arm 4. The second fluid supply line 7 is, for example, slipped over the second outlet port 14.

The domestic dishwasher 1 further has a water switch 15, which is designed in the case of the present embodiment as an insert and is inserted in the first outlet port 13. By means of the water switch 15, the spray arms 3, 4 in particular in each case alternately be charged with the liquid. The FIGS. 2a . 3a show side views of the inserted in the circulation pump 10 water switch 15 in sectional representations and the FIGS. 2b . 3b show operating states of the water switch 15.

In the case of the present embodiment, the water switch 15 has a particular circular bottom 16 whose diameter corresponds substantially to the inner diameter of the first outlet nozzle 13. As a result, the bottom 16 closes the first outlet port 13. The bottom 16 has a first opening 17 and a second opening 18.

In the case of the present exemplary embodiment, the water diverter 15 has a curved tube 19, the first end 20 of which rests against the inside of the first outlet nozzle 13 in such a way that it aligns with the second outlet nozzle 14. The curved tube 19 is connected, for example laterally in particular in one piece or one-piece with the bottom 16. The second end 21 of the curved tube 19 terminates spaced from the bottom 16 above the second opening 18 in alignment so that the liquid delivered by the recirculation pump 10 passes through the second opening 18 of the bottom 16 of the water gate 15 via the curved tube 19 into the second liquid supply line 7 can be promoted.

In the case of the present embodiment, the first liquid supply line 6 protrudes into the first outlet port 13 and ends above the second opening 17 with this aligned and spaced therefrom. As a result, it is possible that the liquid conveyed by the circulation pump 10 can pass through the first opening 17 of the bottom 16 of the water switch 15 into the first liquid supply line 6 in order to be conveyed to the lower spray arm 3.

In the case of the present exemplary embodiment, the water diverter 15 has a turntable 22, for example kidney-shaped, as an example of a closing means, which is rotatably mounted by means of a bearing 23, which is integrally formed on the bottom 16, in particular. The turntable 22 is aligned substantially parallel to the bottom 16 and arranged on the side facing away from the interior of the pump housing 11 side of the bottom 16. It is provided behind the bottom 16 as seen in the flow direction, i. it is arranged on the pressure side or outlet side.

The turntable 22 has, for example, a e.g. integral or einstoffig integrally formed driver 24 which projects through a slot, not shown, of the bottom 16 in the interior of the circulation pump 10. The driver 24 cooperates with a guided parallel to the bottom 16 ram 25 having a slot 26 into which the driver 24 protrudes.

The pump housing 11 has laterally an opening 27 through which the plunger 25 is guided and which is sealed, for example by means of a sealing ring 28. Outside on the pump housing 11 is connected to the control device actuator 29, which is for example formed as a coil, which moves the plunger 25, so that this projects to different degrees into the interior of the pump housing 11. Due to the movement of the plunger 25 of the turntable 22 is between a in the FIG. 2 shown first position (idle state) in which the turntable 22, the second opening 18 of the bottom 16 closes, however, the first opening 17 of the bottom 15 opens, and one in the FIG. 3 shown second position in which the turntable 22, the second opening 18 of the bottom 16 opens and the first opening 17 of the bottom 15 closes, moves.

In the case of the present embodiment, the second opening 21 of the curved tube 19 and the first liquid supply 6 are arranged spaced from the bottom 16 so that the turntable 22 has vertical clearance and thereby in operation of the circulation pump 10 due to the pump pressure against the first liquid supply line 6 and is pressed against the second opening 21 of the curved tube 19 to close depending on the position of the turntable 22, the first liquid supply line 6 or the second opening 21 of the curved tube 19. If the circulation pump 10 is switched off, then the turntable 22 rests on the floor 16.

When mounting the running as insert waterway 15, the bottom 16 is inserted with the curved tube 19 into the first outlet port 13 in the case of the present embodiment. So u.A. the first opening 20 of the tube 19 is aligned with the second outlet port 14, the inwardly directed side of the wall 13a of the first outlet nozzle 13, a guide 30 along which the water gate 15 is guided during insertion. In the inserted state, the bottom 16 rests on a step 31 of the first outlet nozzle 13.

Subsequently, the turntable 22 is placed on the bearing 23. In this case, the plunger 25 has a position so that the driver 24 of the hub 22 projects into the slot 26 of the plunger 25.

Thus, it is possible to introduce the water switch 15 in a relatively simple manner in the first outlet port 13.

LIST OF REFERENCE NUMBERS

1

Domestic dishwasher

2

rinse tank

3

lower spray arm

4

upper spray arm

6

first liquid supply line

7

second liquid supply line

8th

arrows

9

wash tub

10

circulating pump

11

pump housing

12

pump cover

13

first outlet nozzle

13a

wall

14

second outlet port

15

water points

16

ground

17

first opening

18

second opening

19

pipe

20

first end

21

second end

22

turntable

23

storage

24

takeaway

25

tappet

26

Long hole

27

opening

28

seal

29

actuator

30

guide

31

step

Claims (12)

1. Circulation pump with a water switch for a dishwasher, in particular for a domestic dishwasher (1), having a pump housing (11) with a first output (13), in which the water switch (15) is arranged, characterised in that the first output (13) is embodied as a first output connector (13) and the water switch (15) is embodied as a shaped insert and the water switch (15) is inserted into the first output connector (13).
2. Circulation pump according to claim 1, characterised in that the first output (13) is arranged in a pump cover (12) of the pump housing (11).
3. Circulation pump according to one of claims 1 or 2, characterised in that the water switch (15) has a wall (16) closing off the first output (13) with a first opening (17) and with a second opening (18) and a closing means (22) in particular mounted on the wall (16) of the water switch (15), which is configured, in a first position, to open the first opening (17) and to close off the second opening (18) and, in a second position, to close off the first opening (17) and to open the first opening (18).
4. Circulation pump according to claim 3, characterised in that the closing means (22) is arranged on the side of the wall (16) of the water switch (15) facing away from the interior of the circulation pump (10) and/or has play in the direction perpendicular to the wall (16) of the water switch (15).
5. Circulation pump according to claim 3 or 4, characterised in that the water switch (15) has an actuator (29), which is configured to move the closing means back and forth between the first position and the second position.
6. Circulation pump according to claim 5, characterised in that the actuator (29) is arranged outside on the pump housing (11) of the circulation pump (10) and the closing means (22) moves by means of a plunger (25) coupled to the closing means (22).
7. Circulation pump according to one of claims 3 to 6, characterised in that the pump housing (11) has a second output (14) in particular embodied as a second output connector (14), which communicates with the second opening (17).
8. Circulation pump according to claim 7, characterised in that the second output (14) is arranged in the wall (13a) of the first output (13) embodied as a first output connector (13).
9. Circulation pump according to claim 7 or 8, characterised in that the water switch (15) has a tubular connection (19) moulded on the wall (16) of the water switch (15), in particular in one piece or from one substance, which tubular connection (19) is connected to the second output (14) and communicates with the second opening (17).
10. Circulation pump according to claim 9, characterised in that the end of the tubular connection (19) facing towards the second opening (17) ends at a distance from the wall (16) of the water switch (15).
11. Dishwasher, in particular domestic dishwasher, having a dishwasher cavity (2), a first spray apparatus (3) arranged inside the dishwasher cavity (2), a second spray apparatus (4) arranged inside the dishwasher cavity (2), a circulation pump (10) for supplying washing liquid to the spray apparatuses (3, 4) and a water switch (15) which is configured to open and close a feed line section (6, 7) to the spray apparatuses (3, 4), characterised in that
    the circulation pump (10) and the water switch (15) are embodied as a circulation pump (10) with water switch (15) according to one of claims 1 to 10.
12. Dishwasher according to claim 11, characterised in that the feed line section (6) assigned to the first spray apparatus (3) ends at a distance from the first opening (17) of the water switch (15) and/or that the feed line section (6) assigned to the first spray apparatus (3) protrudes into the first output of the circulation pump (10) embodied as a first output connector (13).

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