DE2432242B2 - Drain pan of the washing compartment of a dishwasher - Google Patents

Description

The invention relates to a drain pan of the washing compartment of a dishwasher according to the preamble of claim 1.

From DE-OS 14 28 353 is a dishwasher known, in the case of the cleaning of the rinse water circulated in the circuit, a sieve cylinder so in the Drain pan stands that the rinsing water collecting on the bottom pan through a bottom opening into the The screen cylinder runs and through the screen jacket into an annular channel between the screen cylinder and the drain pan reaches, from which the connecting piece of the circulation pump branches off. From the bottom of the drain pan branches off centrally the connection piece of the drainage pump, in such a way that the sieve cylinder concentrically above the drainage pump connection piece stands. A spray device with fresh water connection is available for cleaning the sieve necessary.

In order to save additional devices for cleaning the sieve, attempts have already been made to self-cleaning of the sieve by the fact that the drainage at the end of the rinsing process Rinsing water flows over the dirty sieve surface and also that which flows out of the circulatory system Water passes through the sieve in the opposite direction and entrains deposited dirt particles.

It is also known that the bottom of the washing compartment has a rounded transition with the drain pan forms (DE-AS 11 59 604). The rounding is limited on the upper edge of the drain pan.

It has been found that due to a non-uniform configuration of the bottom of the washing container or because of an asymmetrical arrangement of the suction nozzle or because of uneven spray jets the spray devices or because of an uneven arrangement of the spray devices in the washing tank etc. in the known dishwashers an uneven backflow of through the Spray device on the dishes sprayed water to the suction nozzle and thus for the drainage or circulation pump results Another problem with the known dishwashers is that when circulating and pumping off the rinsing liquid through a fine sieve that covers the drain pan Sieve clogs up with food residues relatively quickly and this reduces the performance of the circulation pump. at the known household dishwashers are per wash cycle with a water filling of about 10 to 14 liters worked occasionally suck in air with the irregular water supply via the connecting piece. This would make the The spray pressure on the spray device will drop and the cleaning effect of the machine will deteriorate.

The object of the invention is to provide the drain pan of the washing compartment of a dishwasher to be designed in such a way that even with a smaller amount of water per wash cycle, a favorable, fast flow path of the water from the tub to the circulation pump prevents air being drawn in The sieve is largely kept free of dirt and there is only a small amount of dirt carried over during the wash cycle.

The solution to this problem according to the invention can be found in the characterizing part of claim 1. Appropriate refinements are given in the subclaims.

The invention provides a streamlined design of the drain pan from the washing compartment floor created for the drainage and circulation pump, which ensures effective operation of the dishwasher with a reduced water capacity and at the same time an effective filter arrangement for the rinsing fluid, which in the case of an exchangeable arrangement of the insert in the The drain pan is easy to clean

An exemplary embodiment of the invention is shown schematically in the drawing

The washing container 1 of a dishwasher, shown only in the lower part, has a washing container base 2, which slopes down towards a drain pan on the drain pan jacket 3 of the annular The drain pan is a drain connection 4 to the drain pump, not shown, and to the drain pan bottom a suction port 5 is centrally connected to the circulating pump, also not shown. For The washing container base 2 with the drainage tub jacket 3 also forms a favorable outlet design a rounded transition 6 and an insert 7 is provided in the drain pan, the one after has a tapered shape 8 at the bottom, the surface line of which runs parallel to the transition 6 and thus a Annular channel 9 of the same gap width from the rinsing container into the drain pan forms through to the drain pan The sloping floor of the rinsing container is used to drain the water in the direction of the suction nozzle of the circulation pump accelerated and through the insert 7 in the drain pan a uniform water drainage over the formed between insert 7 and drain pan shell 3

th ring channel 9 reached The rounded transition 6 contributes to the even flow of water Floor pan in the expanded drain pan opening by means of the expanded drain pan opening, the cross section of which corresponds approximately to two to four times the cross section of the suction nozzle 5 is achieved, that in front of the suction port 5 of the circulation pump, even when the dishwasher is running with reduced Water level in which a water level is maintained in the drain pan so that air is sucked in prevented by the circulation pump

To hold back coarse food residues from the drainage and circulation pump is at the inlet of the Ring channel 9 a coarse screen 10 is provided. The insert 7 has a cover 11 at the top, which the draining water flowing in to the annular channel 9. The annular coarse sieve 10 can be attached to the cover 11 be molded.

According to further training is in the drain pan

the discharge nozzle 4 for Enticerungs Pump arranged in such a way that over it the out of the machine To be pumped rinsing liquid is only filtered through the coarse sieve 10, while after Outlet of the annular channel 9 and before entering the suction port 5, the liquid to be circulated a intermediate fine screen cylinder 12 must pass. The fine sieve is only used by the one to be circulated Liquid applied

By designing the fine sieve as a suction port 5 of the circulating pump in the drain pan upstream fine screen cylinder 12 has the advantage that the fine screen when pumping out the Rinsing liquid is cleaned automatically via the drainage nozzle 4 of the drainage pump. The stake 7 can be designed as a one-piece plastic part with cover 11 and coarse and fine sieve 10 and 12, respectively and has support webs 13 formed laterally in the drain pan for exchangeable mounting.

1 sheet of drawings

Claims (3)

Patent claims: 1. Drain pan of the rinsing container bottom of a dishwasher, which has a sieve and connecting pieces for a circulation and drainage pump, characterized by an in the rinsing container (1) protruding insert (7), which has a shape (8) tapering downwards and with a rounded transition (6) of the washing container base (2) into the drain pan shell (3) an annular channel (9) limits that the insert above a cover (11), which the liquid to through a coarse sieve (10) covered ring channel inlet drains, and below one above the drain pan bottom connected suction nozzle (5) of the circulation pump standing fine screen cylinder (12) and that the discharge nozzle (4) to The drain pump is led out of the ring channel from the drain pan 2. Drain pan according to claim 1, characterized in that the surface line of the mold (8) of the insert (7) parallel to the rounded transition (6) of the rinsing container base (2) into the drain pan shell (3) runs 3. drain pan according to claim 1, characterized in that the insert (7) with its covering hood (11), the adjoining annular coarse filter (10) and the standing in the drain pan fine mesh cylinder (12) m the Abdeckhaubenrand consists of a plastic injection molded part, which has lateral support webs (13) for the removable holder in the drain pan.