DE102013100659A1 - Dishwasher with a collection pot - Google Patents

Abstract

The invention relates to a dishwasher with a collecting pot (1) arranged underneath the washing container for holding the washing liquid and a sieve element (11) inserted in the collecting pot (1), which is located between a circulation area (17) and a dirt collecting area (18) of the collecting pot (1 ) is arranged, the collecting pot (1) via a circulation pump connection (3) arranged in the circulation area (17) with a circulation pump (4) for flooding the washing liquid during a washing process and via a drain pump connection (6) arranged in the dirt collection area (18) with a Drain pump (7) for pumping out the rinsing liquid after completion of a rinsing process, and wherein the collecting pot (1) has a base part (14) which represents the support area for the sieve element (11) used. The bottom part (14) is formed with guide channels (15) which are oriented in such a way that rinsing liquid intended for pumping is directed to the drain pump connector (6). This special configuration ensures that even fine-grained particles, such as grains of sand or the like, are pumped out. These fine-grained particles can otherwise pass through the sieving system and would permanently pollute the washing liquid in the circulation circuit during the washing operation.

Description

The invention relates to a dishwasher with a collecting pot according to the preamble of claim 1.

Dishwashers, especially dishwashers for the household, must be equipped in their rinse water circuit for pumping and for pumping out the rinsing liquid with a well-functioning filter combination in the collecting pot of the washing. In the DE-PS 39 31 031 such as DE 10 2009 027 910 Dishwashers are described with such sieve combinations. Such sieve combinations typically comprise a flat screen covering the collecting pot and a micro sieve as well as a coarse sieve.

Despite the sieve combinations successfully used in practice, particle deposits in the collecting pot can often occur. Sand grains and fine-grained particles in particular remain behind in the collecting pot after pumping. Through the fine sieve, such particles can reach the recirculation area of the collecting pot. However, the geometry of the collection pot in conjunction with the geometry of the screen combination employed, to a great extent prevents sand and other fine-grained particles having a grain size exceeding the aperture size of the microscreen during e.g. 0.3 to 1.5 mm into the suction area of the drain pump. In addition, clumps of this expansion can form in the circulation area of the collecting pot. As a result, the components involved in the circulation cycle, such as pump impeller, water switch, spray arms, etc., can be damaged or blockages can be caused as a result.

Due to the problem described above may also result in a more and more constructive Laugenverschleppung.

The invention thus provides the problem of creating a dishwasher with a collecting pot of the type mentioned, in which also fine-grained dirt particles from the dishwasher with reasonable certainty from the dishwasher can be promoted.

According to the invention, this problem is solved by a dishwasher having the features of patent claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

The advantages that can be achieved with the invention are in particular that the pumping of even fine-grained particles is ensured and that the mechanical components involved in the circulation process are spared. In addition, a permanent Laugenverschleppung is avoided.

The dishwasher according to the invention has a collection pot arranged below the washing container, with which flushing liquid originating from the washing container is collected. In the rinsing operation, the rinsing liquid passes from the collecting pot to the circulating pump, which in turn conveys it via spraying devices into the washing compartment.

The dishwasher also has a sieve element inserted into the collection pot. The screen element, which is typically referred to as a microsieve, is disposed between a recirculation area and a debris collection area of the collection pot, i. the microsieve separates a first region of the collecting pot, which can be assigned to the circulation of the splashing liquid, from a second region of the collecting pot, which can be assigned to the pumping out of the rinsing liquid. In the first area, i. Umwälzbereich, the collecting pot is arranged a circulating pump nozzle, which produces a direct fluidic connection from the collecting pot to the circulation pump. In the second area, i. Dirt collecting area, the collecting pot is arranged a drain pump nozzle, which communicates with a drain pump for pumping out the rinsing liquid after completion of a rinsing process.

The sieve element can be designed in a manner known per se, for example, cylindrical or preferably cone-shaped, wherein it largely surrounds the dirt collecting area. Radial around the sieve around the Umwälzbereich is arranged.

The collection pot comprises a bottom part, which represents the support area for the inserted sieve element, ie the microsieve, and which is thus arranged below the sieve element. The bottom part preferably has a substantially annular bearing surface for the sieve element. The bottom part is inventively formed with guide channels, which are aligned such that for pumping certain rinsing liquid is passed to the drain pump nozzle. In this case, the guide channels represent a connection from the circulation area to the dirt collection area of the collection pot. Rinsing liquid and fine-grained particles contained therein can thus pass from the circulation area through the guide channels to the discharge nozzle, in particular bypassing or avoiding the sieve element, ie microsieve. In other words, the guide channels thus represent an alternative flow path, ie a type of bypass for the flow of the rinsing liquid from the circulation area of the collecting pot to Dirt collection area. Through the guide channels, the rinsing liquid can reach below the plane of the support surface of the bottom part and thus below the sieve element in the dirt collecting area.

In this way, an improved pumping of fine-grained particles can be achieved. Fine-grained particles which on the one hand are small enough to enter the circulation area of the collecting pot or which have formed in the circulation area of the collecting pot by agglomerations, and which on the other hand are too large to pass through the sieve, i. The microsieve, to get into the dirt collecting area, can thus be conveyed out and pumped out of the recirculation area by the guide channels.

Preferably, the guide channels are arranged in an azimuthal region of the bottom part, which is located in the vicinity of the circulating pump nozzle, through which the rinsing liquid is passed to the circulation pump. As a result, a substantially complete emptying of the circulation pump and the associated housing parts and thus minimizing Laugenverschleppung is achieved.

The guide channels are preferably dimensioned such that dirt particles with an extent in at least one direction of less than 1.5 mm or with a grain size of less than 1.5 mm can be passed to the drain pump nozzle. This ensures that all or almost all dirt particles, which in particular pass through an area sieve which typically closes the circulation area of the collection pot to the rinsing container, have entered the circulation area, can be conveyed out of the circulation area by the guide channels. Likewise, particles that have only clumped together in the recirculation area can be removed.

The bottom part has for this purpose preferably recesses and rib-shaped webs; These form the guide channels, which lead from the circulation area to the dirt collecting area of the collecting pot. The recesses preferably have a width of 1 to 2 mm, typically 1.5 mm.

Preferably, 3 to 20 guide channels are present so that on the one hand an effective discharge of the dirt particles is achieved and on the other hand, the filter effect of the screen element is not affected.

According to an advantageous embodiment of the invention, the rib-shaped webs on the dirt collecting area side facing inlet wedges, which allow the operation of the circulating pump clogging of the guide channels by coarse dirt particles. The guide channels are thus widened in a funnel shape on the side facing the dirt collecting area. When operating the circulation pump, rinsing liquid is sucked from the collecting pot in the direction of the circulation pump nozzle in the circulation pump. In particular, there is also a suction effect through the guide channels from the dirt collecting area in the direction of the circulation area. In this case, however, the guide channels set themselves quickly and stably due to the run-in wedges due to coarse dirt, whereby essentially no further rinsing liquid can pass from the dirt collecting area in the circulation through the guide channels, so that contamination of the circulation pump cycle is effectively prevented. The coarse dirt in the inlet wedges is rinsed out of the inlet wedges in a subsequent pumping process.

According to a further advantageous embodiment of the invention, the guide channels are arranged and the depth of the recesses in the bottom part of the collecting pot chosen so that rinsing liquid from the lowest point in the circulation of the collecting pot in the dirt collection area, or preferably can flow to the drain pump neck. The rinsing liquid can preferably, according to gravity, pass from the lowest point in the circulation area of the collecting pot through the guide channels into the dirt collecting area and preferably further up to the pumping outlet. In this way, a reduced alkali carryover can be effected.

An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows

1 in a partial section of the drainage area of a dishwasher with a collection pot in conventional construction in a simplified sectional view;

2 a collection pot designed according to the invention in detail in a perspective view with a view into the interior of the collecting pot;

3 Sectionally in plan view of the area in the collecting pot, in which the guide channels are arranged.

4 an inventive collection pot in detail in a further perspective view with a view into the interior of the collecting pot;

In the 1 is the sieve system and the collection pot 1 with the neck 3 and 6 each for the circulation pump 4 and for the drain pump 7 a dishwasher in today's conventional design shown in detail.

The collection pot 1 for receiving the rinsing liquid is below the Spülbehälterbodens 2 arranged. In the collection pot 1 is a sieve combination integrated, which consists of a fine sieve 9 , a coarse strainer 10 and a microsieve 11 consists.

The collection pot 1 is above the circulation pump nozzle 3 with a circulation pump 4 connected to the flooding of the rinsing liquid during the rinsing process. About the line 5 the rinsing liquid is supplied to the spray arms in the rinsing tank, which then via the sieve combination in the collecting pot 1 flowing back. The arrows shown in the frame illustrate the rinsing liquid flow through the collecting pot 1 during the flushing operation. About the pumping nozzle 6 and the drain pump 7 can after the flushing process, the rinsing liquid in the by the arrow 8th indicated outflow be promoted.

The 2 shows in detail the interior of a collecting pot designed according to the invention 1 in a perspective view and without screen combination.

The opening 12 provides the transition to the circulation pump nozzle and thus the connection to the circulation pump 4 dar. The opening 13 provides the transition to the drain pump nozzle and thus the connection to the drain pump 7 ago.

The bottom part 14 in a collection pot 1 forms the support area for that in the collecting pot 1 used here not shown sieve element of the filter system (microsieve), whereby a separation of the dirty water from the filtered rinse water.

4 shows in a further perspective view of the interior of an inventive collecting pot 1 , but here with inserted sieve element 11 (Microsieve) and coarse sieve 10 but without fine sieve 9 ,

The in the bottom part 14 educated collar is - as in 2 and 4 shown - with multiple guide channels 15 formed, which are aligned so that the rinsing liquid to the opening 13 and thus can flow to the drain pump neck.

These guide channels 15 are dimensioned so that dirt particles with a grain size of up to 1.5 mm can be passed into the pumping process.

The guiding channels 15 be through recesses and rib-shaped webs in the area acting as a sieve pad bottom part 14 of the collection pot 1 educated. They are in an azimuthal region of the bottom part 14 arranged, located just in front of the opening 12 to the circulation pump nozzle 3 located.

The rib-shaped webs are on the side facing the dirty side with inlet wedges 16 or run-on slopes formed. This configuration thus results in this area a funnel-shaped widening of the guide channels 15 like that 3 illustrated. During operation of the circulation pump 4 allow these entry wedges 16 a clogging of the guide channels 15 due to coarse dirt particles, so that no further rinsing liquid from the dirt collecting area 18 in the circulation area 17 through the guide channels 15 can get.

The depth of the recesses in the bottom part 14 of the collection pot 1 is to be chosen so that the drainage water from the lowest point of the collecting pot 1 to the drain pump 7 can flow.

LIST OF REFERENCE NUMBERS

1

collecting pot

2

Soil in the washing container

3

Circulation pump nozzle (connecting piece for circulating pump)

4

circulating pump

5

Lead to the spray arms

6

Drain pump nozzle (connection piece to drain pump)

7

drain pump

8th

drain line

9

fine screen

10

 coarse screen

11

 microfilter

12

 Opening to the circulation pump nozzle or circulating pump

13

 Opening to drain pump neck or drain pump

14

 the bottom part

15

 guide channels

16

 gate keys

17

 recirculation area

18

 Dirt collection area

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3931031 [0002]
• DE 102009027910 [0002]

Claims (6)

Dishwasher with a collection pot arranged below the washing container ( 1 ) for receiving the rinsing liquid and one in the collecting pot ( 1 ) used sieve element ( 11 ), which between a circulation area ( 17 ) and a dirt collecting area ( 18 ) of the collecting pot ( 1 ), the collecting pot ( 1 ) over one in Umwälzbereich ( 17 ) arranged circulation pump neck ( 3 ) with a circulation pump ( 4 ) for flooding the rinsing liquid during a rinsing process and a in the dirt collecting area ( 18 ) arranged drain pump neck ( 6 ) with a drain pump ( 7 ) for pumping out the rinsing liquid after completion of a rinsing operation is in communication, wherein the collecting pot ( 1 ) a bottom part ( 14 ), which the support area for the inserted sieve element ( 11 ) is characterized in that the bottom part ( 14 ) with guide channels ( 15 ) is formed, which are aligned such that for pumping certain rinsing liquid to the drain pump neck ( 6 ). Dishwasher according to claim 1, characterized in that the guide channels ( 15 ) in an area of the bottom part ( 14 ) located in the vicinity of the circulation pump neck ( 3 ), through which the rinsing liquid to the circulation pump ( 4 ). Dishwasher according to claim 1 or 2, characterized in that the guide channels ( 15 ) are dimensioned such that dirt particles with an extent in at least one direction or with a grain size of less than 1.5 mm to the drain pump neck ( 6 ). Dishwasher according to one of claims 1 to 3, characterized in that the guide channels ( 15 ) by recesses and rib-shaped webs in the bottom part ( 14 ) of the collecting pot ( 1 ) formed by the circulation area ( 17 ) to the dirt collecting area ( 18 ) of the collecting pot ( 1 ) to lead. Dishwasher according to claim 4, characterized in that the rib-shaped webs on the dirt collecting area ( 18 ) facing side with inlet wedges ( 16 ) are formed during operation of the circulating pump ( 4 ) adding the guide channels ( 15 ) by coarse dirt particles. Dishwasher according to one of claims 4 to 5, characterized in that the depth of the recesses in the bottom part ( 14 ) of the collecting pot ( 1 ) is selected so that rinsing liquid from the lowest point in the circulation ( 17 ) of the collecting pot ( 1 ) to the drain pump neck ( 6 ) can flow.

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