DE3116217A1 - Dishwashing machine and method for cleaning crockery in such a machine - Google Patents

Description

Dishwasher and method for cleaning dishes in such a machine

The invention relates to a dishwasher according to the preamble of claim 1 and a method for cleaning dishes in such a machine. Such a dishwasher is known from DE-AS lh 53,070 known. There two washing chambers are provided, each with a crockery basket, each of which is assigned its own spray device and its own circulating pump, each with a sieve in a drain pan. This dishwasher is to be operated in such a way that the spraying device of one or the other chamber or the devices of both chambers are each supplied with washing liquid. In addition, the rinsing liquid already used in one rinsing chamber should still be used in the other rinsing chamber. This known dishwasher is intended to enable different program sequences depending on the type and degree of soiling of the dishes to be treated in the respective washing chamber. However, the machine is very expensive to manufacture.

TZP 81/311

It is also from DE-AS 24 28 991 a dishwasher with a circulation pump and a washing container with two crockery baskets arranged one above the other known in the fed by the circulation pump, rotatably arranged under each Cycle times are supplied with rinsing liquid. This is intended to achieve a good cleaning result with reduced water and Energy consumption can be achieved. The device required in this known dishwasher for reversing The liquid supply to the respective spray arm is complex and prone to contamination · The circulation pump also works not in. due to the different hydraulic conditions in the supply of the respective spray arm their optimal operating range.

The invention is based on the object of a cost-effective To propose manufacturable dishwasher of the type mentioned, in which depending on the degree of soiling of the dishes to be cleaned and their quantity a particularly economical mode of operation with a good cleaning result is achieved.

This task is characterized by that in claim 1 Features solved.

With such a machine it is advantageously possible to use the two spray devices separately or simultaneously to supply the corresponding circulation pump with flushing liquid when the operating mode is optimal. If the dishes are only slightly soiled or not very dirty, it is sufficient to operate a circulation pump. Depending on how dirty the dishes are, this can be the most effective way of removing the leftovers

TZP 81/311

filtering out the rinsing liquid will.

Advantageous refinements of the invention are set out in the subclaims 2 to 6 marked.

The invention also relates to a method of cleaning of dishes in such a dishwasher. This method is intended to improve the cleaning result be achieved.

This object is achieved by the measure specified in claim 7. This has the advantage that they are detached Coarse food residues only load the coarser sieve, while the sieve with the finer perforations is for later use retains its full effectiveness.

The measure specified in claim β ensures that even fine dirt particles are filtered out of the rinsing liquid which would otherwise lead to back-soiling of the dishes that have already been cleaned.

In the drawing, a dishwasher designed according to the invention is shown schematically as an exemplary embodiment. Show it:

Fig. 1 the dishwasher with two in the rinsing container crockery baskets arranged one above the other, each of which has a spray device with a Circulation pump and a sieve with different perforations in the drain pan of the container is,

2 shows a plan view of the enlarged screens with different perforations in the drain pan, as a first embodiment, and

Fig. 3 differently from Fig. 2 designed screens, as a second embodiment.

TZP 81/311

10 1 a Geschirrspülnaschine in FIG. Ait two in tracer container 11 arranged above one another dish racks 12 and 13 denotes · for spraying the la upper rack to be classified 12, harness, not shown, with rinsing liquid is arranged a spraying device Ik below this basket as their from a Bit Suction nozzle 15 is supplied with the washing liquid to the side of the drain pan 16 of the washing compartment 11 connected circulating pump 17. Below the lower crockery basket 13 there is also a spray device 18, the circulating pump 19 of which is connected with its suction nozzle 20 to the side of the drain pan 16 opposite the circulating pump 17. Each of the two circulating pumps 17 and 19 is equipped with its own drive motor so that the one spray device can be supplied with rinsing liquid completely independently of the other spray device. In addition, on the bottom side of the drain pan 16, the suction nozzle 21 of an emptying pump 22 for the used rinsing liquid is connected.

Each of these pumps is assigned a sieve with different perforations located in the drain pan. The sieve 23 assigned to the circulating pump 17 for the upper spray device 14 is provided with a particularly fine perforation. This sieve 23 covers almost half of the drain pan 16 on the top. It runs with a relatively large inclination from the edge of the drain pan 16 to its center, where it slopes steeply to the suction port 21 of the drain pump 22. The sieve 2k assigned to the circulating pump 19 of the lower spray device 18 has a somewhat coarser perforation than the sieve 23. It also starts at a slightly less incline from the opposite edge of the drain pan 16 and ends with a steep slope at the suction nozzle 21 of the drainage pump 22 of the drain pan 16, the two sieves and 2k adjoin one another on opposite sides of a common coarse sieve 25 assigned to the emptying pump 22.

TZP

In the first embodiment of the sieve shown in FIG. 2, the coarse sieve 25 has a diameter of the circularly designed drain pan 16 corresponding longitudinal extent · In the second embodiment according to FIG 5, on the other hand, the coarse sieve 25 * is made very much shorter in terms of its longitudinal extent the rinsing liquid makes its way through the coarse sieve 25 * is on both sides of this sieve in the area in which the 23 'fine perforation screen adjoins the 24 * coarse perforation screen, one dividing wall 26 extending from the edge of the drain pan 16 and leading to the coarse sieve is inserted.

The dishwasher 10 can be operated for cleaning dishes in the following way:

When sorting the dishes to be cleaned, the upper crockery basket 12 is expediently filled with sensitive, slightly soiled crockery, while heavily soiled crockery items are placed in the lower crockery basket i3. At the start of the wash program, only the circulating pump 19 of the lower spray device 18 is operated in the Yorswash wash cycle and, if necessary, in the Clean wash cycle, in order to first remove the coarse dirt on the dishes. The washing liquid ejected by the lower spray device 18 not only hits the crockery items in the lower crockery basket 13 but also reaches the items set in the upper crockery basket Ik. The coarse food residues carried along by the rinsing liquid are held back by the coarse perforation sieve 24 and washed into the coarse sieve 25 by the subsequent flow of liquid. At the same time, the stream of liquid flowing over the sieve 23 with fine perforations (arrow 27 in Fig.i) prevents the food residues from clogging this sieve. Since the circulating pump 17 of the upper spray device Ik is not switched on during the start of the washing program and thus does not exert any suction on the washing liquid flowing into the drain pan 16, over-

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TZP 81 / 3Ü

the partial liquid flow 27 only floods the sieve 23 fine perforation and cleans it.

After the coarse food residues have been removed, the circulating pump 19 can be used in addition to the circulating pump 19 in the further course of the washing program 17 are switched on, so that a complete removal of the dirt on the dishes in the two Dish baskets 12 and 13 takes place. Only at the end of the rinse cycle is it advantageous to use the circulating pump alone 17 to operate the upper spray device 14. This may still stick to the already cleaned dishes Dirt particles rinsed off and filtered out of the flushing liquid by the fine perforated sieve 23. Takes place at the same time during this mode of operation a flooding of the sieve 24 with the coarse perforation according to the arrow 28 in FIG. 1 and thus washing away of the food residues stored on the sieve in the coarse sieve 25. When the washing liquid is pumped out of the washing container 11 by means of the emptying pump 22, the food residues that pass through the coarse sieve 25 are removed from the dishwasher 10 funded.

The dishwasher 10 is also particularly suitable for cleaning the upper spray device, for example, during the wash cycle 14 and the lower spray device 18 to be supplied alternately with rinsing liquid. During the spray breaks you can the washing liquid applied to the dishes, the more adhering Soften leftovers. During this mode of operation, the circulation pumps 17 and 19 are operated in their optimal working range. In addition, a smaller amount of liquid compared to the simultaneous operation of the two pumps becomes less Energy to heat up this amount and less cleaning and washing-up liquid is required. By alternately flooding the two Sieves 23 and 24 will at the same time maintain their full functionality.

*) if there are no containers in the lower crockery basket 13

are classified. - 7 -

TZP 81/311

Furthermore, it is possible with the dishwasher 10 to wash a small amount of crockery, which only fills one crockery basket 12 or 13, with little effort. In this case, the small amount of liquid filled into the washing container 11 is only sprayed with the spray device Ik or 18 assigned to the filled crockery basket. Since the circulating pump 19 assigned to the lower spray device 18 is expediently more powerful than the pump 17 »assigned to the upper spray device Ik , the heavily soiled dishes are in the lower crockery basket 13» and the slightly soiled dishes in the upper crockery basket 12 in order to achieve an optimal cleaning result to adjust.

8 claims
3 figures

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Claims (8)

TZP 81/311 claims 1. Dishwasher (10) with two crockery baskets (12, 13) » each of which is assigned a spray device (14, 18) which is operated by its own circulating pump (17 »19) with a upstream sieve (23 »24) is supplied with flushing liquid in a drain pan (16), characterized in that that the spray devices (14, 18) and the crockery baskets (12, 13) one above the other in a single rinsing container (11) with a drain pan (16) are housed so that the two circulating pumps (17 » 19) are connected with their suction nozzle (15, 20) to the drain pan (16) of the washing container (11), and that the circulating pump (17) the spray device (14) of the crockery basket (12) a sieve (23) with finer perforations than the circulation pump (19) of the spray device (18) of the other crockery basket (13) is assigned. 2 · Dishwasher according to claim 1, characterized in that each circulating pump (17, 19) has its own motor is drivable. 3. Dishwasher according to claim 1, characterized in that the circulating pump (17) of the spray device (14) of the upper crockery basket (12) is assigned the sieve (23) with finer perforations. ' 4. Dishwasher according to claim 1 or 3 »characterized in that that the two sieves (23, 24), which partially cover the top of the drain pan (16), in the area in which they border each other at least indirectly, led uind to the bottom of the drain pan. TZP 5. Dishwasher according to claim 4, characterized in that the! Two See (23, 24) to a common, a drain pump (22). assigned resentment si eh (25) adjoin. 6. Dishwasher according to claim 4, characterized in that that the sieve (23) with the finer perforation in its area assigned to the top of the drain pan (l6) has a greater inclination than the other sieve (24). 7. Method of cleaning dishes in a dishwasher (lO) according to one of claims 1 to 6, characterized in that at the beginning of a wash program first the circulation pump (19) to which the sieve (24) is assigned to the coarse perforation is operated. 8. The method according to claim 7, characterized in that on At the end of the rinsing cycle, only the circulating pump (17) is operated, to which the sieve (23) with fine perforation is assigned is.