DE102009028278A1 - Water-conducting household appliance - Google Patents

Abstract

The invention relates to a water-bearing household appliance, in particular a dishwasher, with a storage container (19) in which the washing liquid can be temporarily stored, and with a liquid line (23) which connects a washing container (1) of the water (19), the liquid line (23 ) a valve (26) is arranged, through which flushing liquid can flow in the open state in a flow direction (I). According to the invention, the liquid line (23) has a dirt particle retention device which collects dirt particles (61) upstream of the valve (26) in the flow direction (I).

Description

The The invention relates to a water-conducting household appliance, in particular a dishwasher, with a storage container, in the rinsing liquid cacheable, and with a fluid line, the one Rinsing of the water-bearing household appliance with the storage tank connects, being in the fluid line a valve is arranged, which in the open state in a flow direction of rinsing fluid flow through is.

During one rinse go through dishwashers washing programs, which consist of a number of partial program steps, such. B. Pre-wash, Cleaning, intermediate rinsing, Rinse and Dry. For distribution of liquid while a rinse program run are in the fluid circuit a dishwasher Provided valves that open or close a fluid path. however can Dirt particles in the liquid to block a valve.

The The object of the invention is a household appliance, in particular Dishwasher, to provide in which ensures a reliable valve operation is.

The The invention is based on a water-conducting household appliance, in particular a dishwasher, with a storage container, in the rinsing liquid cacheable, and with a fluid line, the one Washing container of the water-bearing household appliance with the storage tank connects, being in the fluid line a valve is arranged, which in the open state in a flow direction of rinsing fluid flow through is

According to the characterizing one Part of claim 1, the liquid line in the flow direction the contaminant particle collecting dirt particle retention device upstream of the valve on. This may be, for example, a siphon or a filter act.

In the storage container can rinse liquid cached after execution of a part program step a rinse does not more needed becomes. The no longer required rinsing fluid gets from the dishwasher by means of a circulation pump as well as when open Storage tank valve in the storage tank pumped. Subsequently becomes the storage tank valve closed and, for example, until the next rinse cached and the next rinse for pre-rinsing of the items to be washed be used. To fill and emptying the storage container To control is a storage tank valve provided with a control device of the dishwasher the fluid path to open or close the storage container.

By the dirt particle retention device the valve remains largely free of at least larger dirt particles, that could otherwise stick in the valve. The arrangement of the valve with assigned siphon is therefore mainly in the dirty and service water area a water-bearing Household appliance, in particular a dishwasher, used.

Of the Siphon can be designed as, for example, as a tube siphon his and two essentially vertically aligned, to each other opposing Have line sections, one of which directly with the Valve is connected. The two opposing line sections of the Siphons are over a siphon floor connected to each other, on which the dirt particles collect.

Of the Siphon can the valve in the flow direction be preceded by that coupled to the valve Siphon line section immediately starting from the valve with a predetermined angle of inclination down to the siphon bottom can extend. The angle of inclination of the siphon pipe section can change be larger, for example, towards the siphon bottom. The dirt particles collecting in the siphon pipe section can therefore due to the line gradient towards the siphon bottom, that is, away from the valve.

Of the Siphon can with its corresponding line section in one Open valve space of the valve. Within the valve space may be a valve element, such as a valve plate Adjust to the fluid-flowed valve chamber to open or close. The mouth of the Valve can of a, cooperating with the valve element Valve seat be limited edge. In the closed state can the adjustable valve element liquid-tight in contact with Press the valve seat. In the open State of the valve, however, the valve element via a Valve lift be adjusted away from the valve seat, creating a flow gap for Mouth opening exposed which is the fluid flow through the valve allows.

The resulting in the closed state of the valve sealing surface between the valve seat and the adjustable valve element must be substantially free of dirt particles to ensure proper operation of the valve. It has proven to be advantageous if the sealing surface is not aligned in a horizontal plane, but rather towards egg Such a horizontal plane is inclined, and in particular is aligned in a vertical plane. Dirt particles can thus permanently settle either on the sealing surface of the valve seat or on the sealing surface of the associated valve element and lead to a sticking of the valve element to the valve seat.

Around a task-oriented effect to ensure the siphon it is advantageous if the siphon bottom by a predetermined height difference below of the valve, in particular arranged below the above-mentioned orifice in the valve chamber is. The height difference results from the flow conditions in the fluid line, in particular from the flow velocity the liquid flow. at is greater fluid flow the height difference between valve and siphon bottom to increase accordingly the dirt particles collected at the siphon bottom are not up to the valve promoted can be.

Around a discharge of dirt particles already inside the valve to support, it may be advantageous if the liquid line downstream of the Valve is continued vertically downwards. The dirt particles can therefore additional by gravity shift out of the valve chamber of the valve. Against this background, it is particularly preferred if the valve space the bottom of the valve has a passage at which the liquid line connect downstream of the valve can.

The Storage tank valve is fluidic between the washing and the storage container, this means in the dirty or service water area of the dishwasher. Here there is the problem that with the valve open dirt particles inside the storage tank valve get stuck and get stuck there. In this case, there may be a malfunction or leakage at the valve and thus lead to a malfunction of the storage container.

to Return of the cached rinsing liquid in the fluid circuit the dishwasher the storage tank valve is opened, causing the rinsing liquid from the storage tank stream can. The rinsing liquid can under gravity, that is, at low speed, from the storage tank in the dishwasher the dishwasher flow.

The Draining the cached rinsing liquid from the storage container is in terms of a disorder of the storage tank valve critical. In this case, there is the risk that dirt particles entrained from the storage tank and the storage tank valve can enforce. The siphon according to the invention can therefore be particularly fluidic between the storage tank valve and the storage container be switched to catch these dirt particles.

The Draining the cached rinsing liquid from the storage container, as mentioned above, done under gravity, that is with correspondingly lower Flow rate. The geodetic height difference between the storage tank valve can also be correspondingly reduced and the siphon bottom.

In contrast, will when filling of the storage container rinse by means of the circulation pump at big Speed pumped into the storage tank. In this way The siphon bottom is regularly with greater liquid velocity flushed, whereby clogging of the siphon can be avoided.

It but it is also possible the siphon instead of a tube siphon form as a bottle, partition wall or bell siphon.

In a further embodiment it is preferably provided that the dirt particle retention device has a filter with which dirt particles can be retained, in particular one the reliable one Operation of the valve disturbing Minimum size.

In a development is provided that the filter can be cleaned by backwashing is so that a clogging of the filter is reliably prevented.

Further is provided in a development that backwashing through at least partial emptying of a storage container effected is in the rinse liquid is cacheable, and that the liquid line is a washing container of the water-carrying household appliance with the storage tank combines. It is with the emptying of the storage container a Generates liquid flow, opposite to the direction of flow is where the filter is filling of the storage container flows through becomes. Subsequently For example, by operating the drain pump with dirt particles staggered amount of liquid from the household appliance be promoted in a home-based sanitation network.

In a further embodiment, it is preferably provided that the dirt particle retention device has a centrifugal separator, with which a rotating liquid flow can be generated, by dirt particles abge can be separated.

Finally is preferably provided that one in the first flow direction present rinsing liquid flow of Storage tank emptied is. Thus, the valve is conveyed out of the full storage tank before Protected dirt particles, which, for example, only by z. B. biological processes have formed. However, it is also possible that the dirt particle retention device Dirt particles when filling of the storage container restrains.

following is an embodiment the invention with reference to the attached Figures described.

It demonstrate:

1 in a schematic block diagram, a dishwasher with a storage container;

2 a view corresponding to the 1 in which a cleaning of the storage container is illustrated;

3 in an enlarged side sectional view of the storage container valve with associated siphon; such as

4 and 5 each in views corresponding to the 3 at different operating conditions of the dishwasher.

In the 1 schematically is a dishwasher with a, a Spülraum limiting rinse tank 1 shown. In the washing compartment of the washing container 1 can a not shown, to be cleaned dishes in baskets 3 . 5 to be ordered. In the washing container shown 1 are exemplary two, provided in different spray levels spray arms 7 . 8th arranged, via which the items to be washed is applied with rinsing liquid. In the Spülbehälterboden is a pump pot 11 with a roughly indicated sieve arrangement 10 intended. From the pump pot 11 is a circulation line 9 with circulating pump arranged therein 13 led away. The circulation line 9 is via supply lines 14 . 15 fluidically with the spray arms 7 . 8th connected. The circulation pump 13 downstream is a, called water heater heating element 12 ,

The sump 11 is also connected via connecting pieces with a fresh water supply line coupled to the water supply network 16 as well as with a drain line 17 in connection, in which a drain pump 18 for pumping out rinsing liquid from the rinsing container 1 is arranged. The washing container 1 points to his, in the 1 right side as a storage container 19 a so-called storage container, which is thermally coupled in the manner of a heat exchanger in contact with a side wall 20 of the washing container 1 is.

In the storage container 19 rinsing liquid can be cached, which is no longer needed after execution of a part program step of a rinse cycle. The storage tank 19 is in its upper area via a ventilation opening 22 fluidically in connection with the washing compartment.

During the execution of a rinse are in the liquid circuit, inter alia, the sump 11 with assigned sieve arrangement 10 , the circulation line 9 , the supply lines 14 . 15 as well as the two spray arms 7 . 8th integrated.

Downstream of the heating element 12 is in the circulation line 9 one as a three-way switching valve 25 provided water diverter provided at the one connecting line 23 branches off to the storage tank 19 leads.

In the in the 1 shown switching position of the three-way switching valve 25 is the connection to the storage tank 19 interrupted and the circulation line 9 with the supply lines 14 . 15 connected. In this switching position of the three-way switching valve 25 Therefore, the rinsing liquid for performing the rinse cycle in the dishwasher can be circulated.

The three-way switching valve 25 connects in contrast to a in the 2 shown switching position the circulation line 9 with that, to the storage tank 19 leading connection line 23 and interrupts the flow path to the supply lines 14 . 15 , In this switch position can for cleaning the storage container 19 the flushing liquid at a high flow rate in the storage container 19 be pumped and fill this until the rinse liquid is above the vent 22 in the washing container 1 enters and along the Spülbehälterwand 20 past the baskets 3 . 5 back in the sump 11 with assigned sieve arrangement 10 is returned. In this way, dirt particles, grease residues, etc. from the storage container 19 be guided.

Thus the filling or emptying of the storage container 19 by means of the control device 27 can be controlled is a storage tank valve 26 intended. The valve 26 is in the to the storage tank 19 leading connection line 23 arranged and arranged in its open position, for example during the above-mentioned storage tank cleaning.

By way of example, the rinse cycle can be started with a pre-rinse step in which one in the storage container 19 cached Klarspülwassermenge from the previous rinse in the sump area of the washing 1 is admitted. For this purpose, the storage tank valve 26 opened and the three-way valve 25 in the in the 2 shown switched position. The cached rinse amount can therefore alone by gravity into the sump area of the washing 1 flow.

Subsequently, the three-way switching valve 25 in his in the 1 shown switching position switched and the circulation pump 13 which starts from the storage tank 19 drained rinse water can circulate. After execution of the pre-rinsing step, the rinsing liquid by means of the drain pump 18 pumped off and then supplied fresh water for a subsequent cleaning step in the sump area.

Like from the 3 shows, is the connection line 23 over a mouth opening 29 with a valve chamber 31 the storage tank valve 26 in connection. The valve room 31 is radially outside with a connecting piece 33 limited. The stub 33 is over two stiffening ribs 35 with the bottom of the storage tank 19 in connection. The valve room 31 also opens on its bottom side via a passage 37 again in the connecting line 23 , which have a connecting piece 39 at the water switch 25 is connectable. The connection line 23 is starting from the bottom passage 37 of the valve 26 Continuing vertically downwards via a U-shaped bend.

In the, the valve room 31 limiting neck 33 is an actuator insert 41 the storage tank valve 26 used. The actuator insert 41 may be exemplified by a thermo-actuator, on the valve tappet 43 a valve plate 45 is attached.

In the 3 is the valve plate 45 shown in its closed position, in which the sealing points 47 of the valve disk 45 and the valve seat 49 are pressed in sealing. The valve seat 49 is circumferentially around the mouth opening 29 drawn. Here are the sealing points or sealing surfaces 47 of the valve seat 49 and the valve disk 45 according to the 3 aligned in a vertical plane.

The valve plate 47 is according to the 3 integral part of a membrane element 51 , which is formed as a substantially rotationally symmetrical silicone component. The rotationally symmetric membrane element 51 is with its open annular end in an annular gap between the connecting piece 33 and an inner pipe socket 55 a housing part 57 used. The actuator insert 41 is therefore not directly in the connection piece 33 used, but with the interposition of the housing part 57 ,

Like from the 3 further shows, the liquid line 23 between the storage tank valve 26 and the storage container 19 a siphon 59 on that in the 3 indicated dirt particles 61 from the valve 26 restrains. The siphon 59 is by two substantially vertically aligned pipe sections 62 and 63 formed, which run counter to each other. The two line sections 62 . 63 are each directly at the mouth opening 29 of the valve 26 and at a passage opening of the storage container 19 connected. The pipe section 62 of the siphon 59 extends directly from the valve 26 with a rising angle of inclination α down and goes to the siphon bottom 64 into the storage tank 19 leading line section 63 ,

The pipe section 62 of the siphon 59 is thus starting from the mouth opening 29 always inclined downwards over the inclination angle α, whereby the dirt particles 61 under gravity effect away from the valve 26 to the siphon bottom 64 can walk. The siphon bottom 64 is a height difference Δh below the storage tank valve 26 arranged.

The following are based on the 3 to 5 describe different operating conditions of the dishwasher. So is in the 3 the storage tank valve 26 shown in its closed position, causing the previously in the storage tank 19 pumped flushing liquid can be cached. The in the storage container 19 as well as in the connecting line 23 existing dirt particles 61 Therefore, in the course of time, they are deposited on the bottom of the storage tank 19 and / or on the siphon bottom 64 from. The storage tank valve 26 stays in the area of the sealing surfaces 47 largely free of dirt particles 61 ,

In the 4 is the storage tank valve 26 shown in its open position, in which the valve plate 45 adjusted by one valve lift to the left. In this way, there is a flow gap between the valve disk 45 and the valve seat 49 Approved. The in the storage container 19 cached rinsing liquid is thus under gravity from the storage tank 19 drained and gets back into the liquid circulation of the dishwasher. The cached rinsing liquid thus flows through in the flow direction I the storage tank valve 26 , The height difference Δh between the storage tank valve 26 and the siphon bottom 64 is designed to that at the siphon bottom 64 Trapped dirt particles 61 through the flow I not to the storage tank valve 26 be carried away.

In the 5 In contrast, the operating state when filling the storage container 19 with rinsing liquid or the cleaning of the storage container 19 illustrated with rinsing liquid. In this case, the rinsing liquid by means of the circulation pump 13 at high flow velocity in the flow direction II in the storage tank 19 pumped. In this way, the siphon bottom 64 deposited dirt particles 26 back to the storage tank 19 flushed, causing clogging of the siphon 59 is avoided. The dirt particles 61 can then during a cleaning process from the storage tank 19 over the ventilation opening 22 be discharged into the washroom.

LIST OF REFERENCE NUMBERS

1

rinse tank

3, 5

baskets

7, 8th

spray arms

9

circulation line

10

sieve

11

sump

12

heating element

13

circulating pump

14 15

leads

16

Fresh water supply

17

drain line

18

Drain pump

19

storage container

20

Rinsing container side wall

22

loading and vent

23

connecting line

25

Three-way switching valve

26

Storage tank valve

27

control device

29

mouth

31

valve chamber

33

spigot

37

passage

39

Support

41

Actuator-insert

43

tappet

45

closing element

47

sealing points

49

valve seat

51

membrane element

55

pipe socket

57

housing part

59

siphon

61

dirt particles

62 63

line sections

64

siphon trap

I, II

flow directions

.delta.h

Height difference

α

tilt angle

Claims (15)

Water-conducting household appliance, in particular dishwasher, with a storage container ( 19 ), in which rinsing liquid is temporarily stored, and with a liquid line ( 23 ), which has a washing container ( 1 ) of the water-conducting household appliance with the storage container ( 19 ), wherein in the liquid line ( 23 ) a valve ( 26 ) is arranged in the open state in a flow direction ( I ) of rinsing liquid is flowed through, characterized in that the liquid line ( 23 ) one in the flow direction ( I ) the valve ( 26 ) upstream dirt particles ( 61 ) has catching dirt particle retention device. Water-conducting household appliance according to claim 1, characterized in that the dirt particle retention device is a siphon ( 59 ) with two substantially vertically aligned pipe sections ( 62 . 63 ), one of which is connected to the valve ( 26 ) connected is. Water-conducting domestic appliance according to claim 1 or 2, characterized in that one of the line sections ( 62 ) of the siphon ( 59 ) via an orifice ( 29 ) in a valve chamber ( 31 ) of the valve ( 26 ), which is connected to a valve element ( 45 ) is closable. Water-conducting household appliance according to claim 3, characterized in that the mouth opening ( 29 ) of one with the valve element ( 45 ) cooperating valve seat ( 49 ) is limited, wherein the sealing surfaces ( 47 ) of the valve seat ( 49 ) and the valve element ( 45 ) are inclined with respect to a horizontal plane, and in particular are substantially aligned in a vertical plane. Water-conducting household appliance according to one of claims 2 to 4, characterized in that the line section ( 62 ) of the siphon starting from the valve ( 26 ) with an inclination angle (α) down to the siphon bottom ( 64 ). Water-conducting household appliance according to one of the preceding claims, characterized in that the siphon bottom ( 64 ) by a height difference (Δh) below the valve ( 41 ), in particular below the mouth opening ( 29 ) of the valve ( 41 ) is arranged. Water-conducting household appliance according to one of the preceding claims, characterized in that the liquid line ( 23 ) in the flow direction ( I ) downstream of the valve ( 26 ) is guided downwards, wherein the valve space ( 31 ) of the valve ( 26 ) via a bottom passage ( 37 ) with the. Liquid line ( 23 ) downstream of the valve ( 26 ) connected is. Water-conducting domestic appliance according to one of the preceding claims, characterized in that a second line section ( 63 ) of the siphon ( 59 ) in the storage container ( 19 ) opens. Water-conducting household appliance according to one of the preceding claims, characterized in that in the first flow direction ( I ) in the storage tank ( 19 ) cached rinsing liquid, in particular under gravity, from the storage container ( 19 ) flows into a washing compartment of the dishwasher. Water-conducting domestic appliance according to one of the preceding claims, characterized in that in an opposite second flow direction ( II ) the rinsing liquid by means of a circulating pump ( 13 ) with high flow rate into the storage tank ( 19 ) is eligible. water-bearing household appliance according to one of the preceding claims, characterized that the dirt particle retention device is designed as a bottle, partition wall or bell siphon. water-bearing household appliance according to claim 1, characterized in that the dirt particle retention device has a filter. Water-conducting household appliance according to claim 12, characterized in that the filter can be cleaned by backwashing, wherein the backwashing by at least partially emptying a storage container ( 19 ) is feasible, in the rinsing liquid is cacheable, and that the liquid line ( 23 ) a washing container ( 1 ) of the water-conducting household appliance with the storage container ( 19 ) connects. water-bearing household appliance according to claim 1, characterized in that the dirt particle retention device having a centrifugal separator. Water-conducting household appliance according to one of the preceding claims, characterized in that by a flow direction ( I ) rinsing liquid flow of the storage container ( 19 ) is emptied.

Images