WO2006069836A1

WO2006069836A1 - Dishwasher requiring no added detergent/rinsing agent/softener

Info

Publication number: WO2006069836A1
Application number: PCT/EP2005/055505
Authority: WO
Inventors: Bernd Schessl; Michael Rosenbauer
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2004-12-23
Filing date: 2005-10-25
Publication date: 2006-07-06
Also published as: US20090120138A1; DE102004062244A1; PL1830689T3; CN201001713Y; EP1830689A1; EP1830689B1

Abstract

The invention relates to a program-controlled dishwasher that is to be operated with combined preparations comprising several active substances as detergents. Said dishwasher is characterized in that the same is embodied so as to be free from softening systems and/or dosing devices.

Description

Dishwasher without detergent / rinse aid / softener addition

The invention relates to a program-controlled dishwasher

for operation with combination preparations.

Program-controlled dishwashers generally have the

Subprogram steps "Pre-rinse", "Clean", "Intermediate rinse",

"Rinse" and dry.) Among the cleaners used for the

Operation of dishwashers are required to settle for more

and more so-called "2in1" or "3in1" combination preparations

by. They generally consist of a cleaning substance, a

Rinse aid (2in1) and additionally optionally one

Softener substance (3in1). The combination preparations are both in shape

a pressed tablet, so-called tabs, as well as in powder form

available. The user gives the combination preparation before the

Switching on the washing program in a washing container of

Dishwasher. Depending on the preparation and information of the

It is either in a dosing device of the preparation manufacturer

Dishwasher or directly into the washing, for

Example in the cutlery basket to bring. The combination preparations with

Their various active substances are then essentially of

Beginning of the wash program to clean the in the Dishwasher set, soiled dishes or

Spϋlgutes and with their other functions, especially softening and

Rinse, available.

Although all the active substances from the beginning of the cleaning process

they are to be added at different times in the

Rinse program come into effect. For example, the

Active substance "rinse aid" only at a later date, ie in the

Subprogram step "rinsing" required, to ensure that

the various active substances of the combined preparation for

each required time within the wash program their

To develop an effective effect, combined preparations are essentially used

two principles:

Be after the principle of "carryover" or "dilution"

the active substances, which within the washing program to a later

Time are needed, in particularly high concentration in the preparation

added. It is assumed that by adhesion of the

Active substance on the items to be washed, the rinsing container walls and the

Container cover at the time of their desired effect one more

sufficient concentration of the active substance, eg the rinse aid, in the Rinse liquor is present to the desired cleaning result

achieve.

According to another principle, namely that of the "encapsulation" be

those active substances, which only at a later time to

Use should come encapsulated, for example, with a wax cover. The

Cover dissolves only during the flushing cycle.

and / or pH-dependent gradually on. Thus stands after expiration

the first cleaning steps the encapsulated active substance, for. B.

Rinse aid, only at an advanced time, eg. In the

Subprogram step "Rinsing", available in the program sequence.

The object of the present invention is a dishwasher

indicate when using such combination preparations

In the production is inexpensive.

This object is achieved by a dishwasher with the features

of claim 1. The dishwasher according to the invention is

according to the characterizing features of claim 1 free of

Sofethering and / or metering formed. The

Dishwasher thus comprises only a washing container

within a housing with its basic functions, one Heating device and a circulation pump for the rinsing water,

Storage devices for dishes and sprayers

within the washing container. This is a dishwasher

indicated with the widely used combination preparations

can be operated as intended and successfully. By the

Abandonment of softener systems and / or metering devices, the

Dishwasher, however, manufactured much cheaper

and is less prone to operator error.

In addition, the maintenance of such

Dishwasher due to its simpler features and through

the absence of complicated addition and metering devices

greatly reduced in conventional machines.

Household appliances are different from different institutions in different

Areas under scrutiny. For example in the European

Union must be audited by household appliances, which

Statements about the energy consumption of the respective household appliance in the

Relationship to his performance results. The result of the test

is documented in a test mark. For

Household dishwashers attached to a cold water pipe

are connected, are the intended test procedure and accurate

Active substance amounts in z. B. an EU standard. The norm goes first of dishwashers with dosing devices and

Softener plants off. If no water softener in the

Dishwasher is provided, the manufacturer has a maximum

permissible water hardness for the operation of the machine. A

separate test for dishwashers without metering device is

not provided for and not practicable, since not

comparable. Combination preparations can not do the test

be based on. An examination of dishwashers on

An operation with combination preparations as a dishwashing liquid is therefore not

possible. In many states of the European Union, these reach

Preparations also only a market share of 10 to 15%. In Germany

By contrast, they already make today due to their convenient handling

a share of about 50%. Therefore, it is desirable to have a

Having the device with which the examination of the

Dishwasher according to the invention, for example, according to EU standard

is possible.

According to an advantageous embodiment of the invention, the

Dishwasher therefore have a display device, the

Dosing time or optionally multiple dosing for a

Manual dosing of active substances during program execution

indicates. Since the proposed dishwashers no Have metering device, the drug addition to the required

Ensure the timing, the addition must be simulated. Although could

be provided for this purpose a separate device factory. The one for it

However, the necessary design effort is worthwhile for just one test run

or a few test runs per machine type are not. Therefore, the

Add active substances to the test run by a tester by hand.

The dishwashing machine according to the invention therefore preferably has

Means, which indicate the dosing time of active substances. In order to

the addition can be made at the required correct time, the

Dishwasher according to the invention, for example a

corresponding display device on. For the addition of several

Active substances, for example a cleaner after a prewash

and a rinse aid before a drying process, the display

several dosing times are required. The following is called as

Simplification only starting from a dosing, but the

Possibility to include several dosing.

With the indication of a dosing time by means of the display device

There is no significant design effort, so that the

Dishwasher not noticeably loses its cost advantage. Consequently

can also use dishwashers that operate on

Combination products are matched, a test according to z. B. one Be subjected to EU standard. Because of the prescribed in it

Active ingredient quantities also receive the inventive dishwashers

no more active substances in the cleaning process than in the standard

required. True, the quantities prescribed in the standard give

not necessarily the actual conditions of the normal or

Everyday operation with combination products again, but represent the

Comparability sure.

A separate consideration requires the water hardness. If in

conventional dishwashers operated a softener

from time to time a salt has to be added to it

Regenerate active ingredients of the softener system. In contrast, based

the combination preparations on a deviating principle. them

is a chemical, eg. As phosphate, added, the itself

exert softening effect on the rinse, z. B. calcium ions

tie. However, it is not readily available on the market. Therefore

For the examination of the dishwasher according to z. Eg an EU

Norm either an external Wasserenthärteranlage available

or in a separate instruction from the manufacturer for the

Test procedure a maximum water hardness can be specified. Provided in conventional dishwashers a control for the

required dosing of the cleaner, it is, however, in the

Dishwasher invention this time by the

To comply with the inspector. Therefore, make sure the dosing time

the examiner is informed beyond doubt. Another advantageous

Embodiment of the invention can therefore provide that the

Dishwasher a mechanical display of the

Program sequence, the dosing, in particular optically

is removable. Above all, an analog representation of the program flow

provides easy-to-read information reproduction. She informs the

Viewer not only about the current dosing, but announces

this already in advance. This is for a timely dosage

especially advantageous. The signaling of the dosing time can

also acoustically supported even with a mechanical display

become. Due to the low cost mechanical reproduction is consequently

ensured that the addition of the active substances in the test procedure for

right time can be done.

According to an alternative embodiment of the invention, a

Dishwasher an electronic display device of the

Have program sequence, the optically and / or the dosing indicates acoustically. This will be the program flow and in particular

the dosing times signaled almost unmistakable.

As already explained, the indication of the dosing is only for the

Testing the dishwasher according to z. B. an EU standard

required. In a further advantageous embodiment of the

Dishwasher according to the invention, the display of the

Dosierzeitpunkte therefore preferably factory activated and / or

be deactivated. The additional information regarding the

Dosierzeitpunkte is namely for the usual use of

Dishwasher no longer needed and could be in

Normal operation cause confusion. Depending on the type and type of

Display device can therefore be an additional device for displaying the

Dosing times only attached to the machines to be tested

or any machine can be factory-made for an indication of

Dosing be equipped with the display at not too

testing dishwashers deactivated or not activated at all

becomes.

According to a further advantageous embodiment of the invention, the

Dosing times z. B. on a slide or sticker on the housing

applied, for example on the display device preferably removably applied. The dosing times are z. In minutes, for example

Program start specified. This provides an easy way to get one

Dishwasher for testing according to z. B. an EU standard

to prepare without technically complex modifications compared to the

To have to make series products. With a removable foil or

another printed or described means is the

Dishwasher also without much effort for the

Normal operation with combination preparations convertible. She can both

in a mechanical as well as an electronic display

be used. The no longer needed in normal operation and thus

Confusion stating indication of the dosing times is thus easy too

remove.

For the same purpose, in an alternative embodiment of the

Dishwasher invention, the optical or acoustic

Signaling the dosing times of a display device

preferably be factory-switched on and / or off. At a

Electronic signaling is an activation or deactivation

particularly easy to accomplish by means of a switch. Also one

Electronic signaling can be used both in a mechanical as well

also be used in an electronic display device use. It is also pointed out for the sake of completeness that the

Use of the indefinite article "a" or "an" not

excludes that the characteristics concerned also exist several times

could be.

Claims

claims

1. Program-controlled dishwasher for operation with

Combination preparations, z. B. 2in1 or 3in1 combination preparations,

characterized in that the dishwasher free of

Softening and / or metering devices is formed.

2. Dishwasher according to claim 1, characterized in that means

are present, indicating the dosing time of active substances.

3. Dishwasher according to claim 2, characterized in that a

Display device, which provides a dosing time for a manual dosing of

Active substances during program execution indicates exists.

4. Dishwasher according to claim 3, characterized in that a

mechanical display device the dosing optically and / or

acoustically reproduced.

Dishwasher according to claim 3, characterized in that

electronic display device of the program flow, the dosing times

indicates visually and / or acoustically.

6. Dishwasher according to one of claims 3 to 5, characterized

in that the display of the dosing times is preferably

factory activated and / or deactivated.

7. Dishwasher according to claim 6, characterized in that the

Dosing times on a printed or described means, eg. B. one

Foil or sticker, on the housing, in particular on the

Display device are applied.

8. Dishwasher according to claim 6, characterized in that the

optical or acoustic signaling of the dosing preferably

factory is switched on and / or off.