DE1403641A1 - Household dishwasher machine - Google Patents

Description

GMBH ^p VA C 145

File number P 1 403 641.0

Household dishwasher

The invention relates to a household dishwasher with built-in steam generator

It is known in dishwashers after the last wash cycle the limescale that adheres to the dishes and has precipitated from hard washing-up water due to soft or lime-free water to rinse

The processing of hard water into soft water, e.g. by means of Base exchange or electrochemically working softeners are associated with a relatively high technical effort. It it was therefore proposed to evaporate a small amount of water inside the washing compartment at the end of the last wash cycle, wherein the steam acts on the wash ware and condenses on the latter. The limescale adhering to the dishes is then removed from the runoff Dishwashers washed away from condensate, which with one introduced in the dishwasher housing, from one electrical heating resistor and a bowl containing the water to be evaporated have a separate one Water inlet to the evaporator socket. After every steam rinse you must the bowl can be refilled with water, for which purpose special pipelines provided with valves in the known dishwashers, required are. In the case of automatic dishwashers, it is necessary to control these valves from the program control device of the machine. The technical effort is therefore also considerable in the case of dishwashers of the last-mentioned type. It is therefore the object of the invention to overcome the disadvantages that exist in dishwashers equipped with evaporators to fix a new design of the evaporator and arrangement in the rinsing container.

- 1 - 26o4.19-68

Gi / Sbr

809803/0103

Documents (Art. 7, Section 1, Paragraph 2, No. \ Clause 3 of the Amendment Act of 4.9.1967)

PVA C

This object is achieved according to the invention in that the evaporator consists of an electric one which is open to the washing compartment There is an evaporator trough which takes up the heating resistance, where * in the case of the evaporator in a is located through a sieve covering recess in the bottom of the washing container "

By the inventive arrangement and design of the steam heater required in the known dishwashers piping and valves be omitted ₀ Due to the fact that the steam heater in the form of an open to Geschirrspülbehälterraum evaporator pan is equipped, the latter is constantly flooded by the water during flushing operation when draining the past, virtually pure Rinse water containing rinsing liquor from the rinse tank space remains in the evaporator according to the capacity of the evaporator trough vapor condenses on the Gesohirrteilen and the limescale abschwemmt _o

In the evaporator, is formed in the course of time a limescale, which must occasionally be removed _e The open to Spülbehälterraum evaporator pan is accessible so that the removal of Kalkbelages prepared easily after the removal of the recess abdekkenden sieve, no difficulties.

The steam generator and the water heater for preparation the SpUIflotte can be separated from each other, but also with each other be combined, for example in such a way that the evaporator is part of the water heater usually arranged in the dishwasher is "In the latter case, the vaporizer can also be switched on when a switch that responds to the amount of water in the washing compartment is open o For this purpose, a steam generator is in parallel to the safety device actuated depending on the fluid level

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switch arranged, in automatic dishwashers the steam maker can be switched on and off using the program control device.

In the drawings is the dishwasher formed according to the invention for example and shown schematically «, It show

1 shows a cross section through part of the dishwasher,

2 shows a cross section through a steam generator,

Figure 1 shows part of a dishwasher with a washing container 1 and a basket 2 accommodated therein for receiving the Geohirrs. In the bottom 3 of the container is in a recess 4 - in the so-called sump - the evaporator trough 6 with the heating rod 7 located centrally through the recess a drain pipe 8 is guided, the confluence of which is located in the screen surface 5 and which opens into a pump, not shown. The contaminated liquor is driven into a higher drain by means of the pump. Below the depression k is the water inlet connection 9 'and in its vicinity there is a water outlet connection 10 which leads to a further pump 11. A pressure line 12 of the pump forks in an electromagnetically adjustable three-way valve 13 into a branch Ik, which leads to a spray tube 15 and another branch 16, which leads to a spray tube 17. A plurality of spray tubes can be attached to each side of the washing compartment 1. A further heating rod 18, which is used to warm up the liquor contained in the washing compartment 1, is arranged within the recess k. A thermostat 19 regulates the temperature of the washing liquor in connection with a so holder not shown. A pipe 20 with a small cross-section is connected to the recess k and carries a Staudruokmesser 21,

A plunger 22 of the dynamic pressure gauge acts on a Sohalter 23 in the circuit of the heater 18, so that the heater to heat the

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Fleet only when there is a predetermined minimum water level in the tank can be switched on. One operated by a program controller Sohalter 25 acts on a switching contact 26, which the branch for the heating rod 7 of the evaporator switched

The heating element is, as is apparent in particular from Figure 2, located in the evaporator pan 6, the "having 2 nr a capacity of zwisohen 0.1 and O ₀ 75 1 of water" in a capacity of the rinsing container of between 12:09 and 0 The tray can be made of be formed a longitudinally divided tube, in the curvature of which the heating rod is attached _e

For the steam action cycles, i.e. "soaking cycle and rinsing cycle, a Sohaltkontakt 26 is closed via the program control device 25, Daduroh the heating rod 7 is switched on so that the water contained in the trough 6 evaporates. The rising steam arrives through the openings in the sieve 5 into the interior of the washing compartment 1 and acts there on the dishes and the container wall parts »The steam condenses on the dishes and partially runs into the evaporator trough 6 back

During the rinse cycles, the water contained in the recess will be fed through the drain 10 of the pump 11 and via the electromagnetic Valve 13 optionally fed to the spray pipes 15 and 17. «The rinsing water runs through the openings in the sieve 5 into the recess. fung back, from where it is driven back into the container.

It is understood SiOH that the evaporator duroh the heating element can be heated 18, it being possible to lay the Sohalter 26 so as _β Sohalter the bridges 23 during Einweiohens and / or in FeinspUlgang

A manually operated so holder 29 is used to switch on the heating element 7 and the program drive, for example, to To warm dishes "

2 patient claim «

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Claims (2)

CONSTRUCTAWERKE GMBH * 1A03641 PVA C "5 Aktz. Ρ ι 403 641.0 patent claims 1. Household dishwasher with in the lower part of the Gesohirrspülmaohinengehäuses built-in, from a shell and an evaporator consisting of an electrical heating resistor, characterized in that the evaporator (6, 7) is fiddled in a recess (4) in the bottom of the washing compartment (i, 3) covered by a sieve (5) and from an evaporator trough (6) which is open to the washing compartment and accommodates an electrical heating resistor (7) consists· 2. Household dishwasher according to claim 1, characterized characterized in that the evaporator (6, 7) is part of the heater (18) for generating warm water or is identical to this. Considered publications: German Patent No. 619 938
U.S. Patent No. 2,664,094
Sohweiz «Patent No. 394 PVA 2/11 (Amtsbogwi) 1000 12.63 April 26, 1968 Gi / Sbr 809803/0 103 1U3 documents (Art. 7, Section I, Paragraph 2, No. I, Clause 3 of the Amendment Act of 4.9.1967)