DE102011010283A1 - Purifying household cooking appliance with cooking chamber for receiving attributable finished ready foods, comprises adding a cleaning solution A in a cooking chamber, and starting a first cleaning cycle - Google Patents

Abstract

The method comprises adding a cleaning solution A in a cooking chamber (12), starting a first cleaning cycle, evaporating and distributing the cleaning solution A in the cooking chamber, solubilizing and collecting dirt in the cooking chamber, adding neutralizing/decalcifying solution B and starting a second cleaning cycle, evaporating and distributing the solution B in the cooking chamber, and partially dissoluting deposits and collecting the spent neutralizing/decalcifying solution B together with residues and deposits in the cooking chamber. The method comprises adding a cleaning solution A in a cooking chamber (12), starting a first cleaning cycle, evaporating and distributing the cleaning solution A in the cooking chamber, solubilizing and collecting dirt in the cooking chamber, adding neutralizing/decalcifying solution B and starting a second cleaning cycle, evaporating and distributing the solution B in the cooking chamber, and partially dissoluting deposits and collecting the spent neutralizing/decalcifying solution B together with residues and deposits in the cooking chamber. The addition of neutralizing/decalcifying solution B is added with an excess of acids, which neutralize and/or inactivate the cleaning solution A. The step of distributing the cleaning solution A and the step of distributing the neutralizing/decalcifying the solution B are carried out by circulating an air volume in the cooking chamber through a ventilator or an impeller (18). The step of distributing the neutralizing/decalcifying the solution B is an acid solution, which is metered by a control (20) of the household cooking appliance. The step of collecting the solved organic residues and removed mineral coatings is carried out by the neutralizing-/decalcifying the solution B in a recess (22) of the cooking chamber. The solutions and other formats such as tablets or powders are used instead of product, where the tablets or powders are placed before and/or during the process present in the solution. An addition product for neutralization/decalcifying takes place before a first programme step together with the cleaning product, and is activated at the beginning of a second programme step. The activation of the neutralization- and/or decalcifying product is thermally/mechanically carried out by a separate heating, a high temperature, the impeller, a pH-value-change, and/or different solubilities.

Description

State of the art

• a) Durch den Bediener mittels der Eingabevorrichtung vorgenommenes oder automatisiertes Starten einer Assistenzfunktion für die Durchführung des Reinigungsvorgangs, sobald der Bediener den zumindest teilweise automatisierten Reinigungsvorgang mittels der Eingabevorrichtung startet,
• b) Starten eines Dialogbetriebes durch die Maschinensteuerung, indem alle für die Durchführung des Reinigungsvorgangs erforderlichen Informationen an der Anzeigevorrichtung angezeigt werden und indem der Bediener zur Eingabe von Informationen und/oder Bestätigung vorgeschlagene Maßnahmen über die Eingabevorrichtung aufgefordert wird. Anschließend wird in einem weiteren Verfahrensschritt
• c) der Reinigungsvorgang in dem Haushaltsgerät nach Eingabe aller erforderlichen Informationen durch den Bediener gestartet. Bei dem Reinigungsvorgang handelt es sich um eine Pyrolyse-Reinigung, bei der Fette und Kohlenhydrate thermisch zu gasförmigem CO₂ zersetzt werden, was einerseits mit einem hohen Energieverbrauch und andererseits mit einer sehr hohen Materialbeanspruchung einhergeht.

DE 2006 020 883 A1 refers to a method for performing a cleaning process in a household electrical appliance, in particular in a Haushaltsgarofen. The operator, in particular a domestic oven, starts the at least partially automated cleaning process via an input device connected to a machine control. At least one piece of information is output via the machine controller and displayed to a display device. The method for carrying out the cleaning process comprises the following method steps:

• a) by the operator by means of the input device made or automated starting an assistance function for performing the cleaning process, as soon as the operator starts the at least partially automated cleaning process by means of the input device,
• b) starting a dialogue operation by the machine control by displaying all the information required for performing the cleaning operation on the display device and by prompting the operator to input information and / or confirmation proposed measures via the input device. Subsequently, in a further process step
• c) the cleaning process in the household appliance after all required information has been entered by the operator. The cleaning process is a pyrolysis purification in which fats and carbohydrates are thermally decomposed to gaseous CO ₂ , which is accompanied on the one hand with high energy consumption and on the other hand with a very high material stress.

DE 196 14 439 A1 refers to a furnace and a method for cleaning a furnace chamber. There are given a furnace for heat treatment of food and a method for cleaning a furnace chamber, wherein a liquid detergent is sprayed through a spray nozzle in the oven room for cleaning. The spray nozzle is preferably arranged in the pressure range of a blower, which runs during the spraying of the cleaning liquid and during the subsequent cleaning step at elevated temperature in the range of about 40 ° C to 60 ° C, to a uniform distribution of the cleaning agent in the furnace chamber and intensive cleaning enable. The solution according to DE 196 14 439 A1 goes hand in hand with a high technical effort.

DE 198 38 864 A1 refers to a method and a device for cleaning cooking appliances. According to this solution for cleaning a cooking appliance, at least one spray nozzle is arranged in the cooking chamber, where it is driven to execute a rotational movement. The pivot point of the rotary motion is cyclically moved between the cooking chamber. When the actual cleaning upstream damping step followed by a soaking of residues.

EP 1 146 290 A2 refers to methods for operating a cooking oven and a cooking oven. The oven comprises a furnace muffle, in which the oven muffle is heated programmatically to a set temperature using a chemical cleaning agent to be introduced to clean the oven muffle. After reaching the setpoint temperature, an acoustic and / or optical signal is output, which indicates the possibility of making the introduction of the cleaning agent now. In this method, a chemical cleaning by means of process control on a display for the user to simplify and error prevention is supported. This is particularly useful because a wrong temperature control can cause metal discoloration.

DE 100 60 204 B4 refers to a furnace cleaning system and method of furnace cleaning and cleaning of industrial ovens or combi steamer. Successive cleaning and descaling or rinsing steps are carried out here. The cleaning system for an oven comprises an inner space which can be closed by means of a door. It is a heater for heating the interior space provided, as well as a circulation device for circulating fluid within the interior. This has a floor drain and a bottom valve, and supply means for supplying fluids. A control device is provided, which is coupled with the bottom valve, the circulation device and the supply means for ensuring an automatic cleaning cycle with at least one cleaning step and a subsequent rinsing step with water. There is provided a container for receiving cleaning agents, which is in communication with the interior and has at least one outlet opening for the cleaning agent. Furthermore, a detergent additive is disclosed, which is insertable into the container and can be dissolved by supplying water. The type, amount and solubility of the detergent additive, the shape and size of the outlet opening, the location of the container, the liquid supply means and the controller are coordinated so that the detergent additive in the course of a cleaning cycle by supplying water into the interior of the Furnace is largely residue-free resolvable.

As a common method for cleaning the cooking chamber in Haushaltsback- and -garöfen and non-removable parts of the same, the washing with a detergent is known. In higher-end versions of household appliances with wastewater connections, this process can be supported and promoted by manually started rinsing / soaking processes using water vapor. The use of oven cleaner is usually not recommended because its residues are difficult to remove and with high manual effort. Any remaining residues can contaminate food and at least affect the quality of the food.

Cleaning by pyrolysis is common for ovens and goes out, for example EP 0 995 951 B1 out. Due to the high temperatures in the pyrolytic cleaning and the lack of material resistance of components (seals, etc.), which are used in particular in a Haushaltsgarofen, pyrolysis in Haushaltsgaröfen is not applicable.

To decalcify the cooking chamber, a dilute acid solution in liquid or solid form (eg Tab) is usually used. In this case, this solution is sprayed on manually and rinsed off. If suitable acids are used, spraying can be dispensed with since the dilute acid solution is applied by evaporation. In the DE 100 18 466 B4 a method is described in which a cooking chamber is heated to a defined temperature and then a cleaning agent / decalcifying agent is introduced into the cooking chamber, so that this can act through air circulation a defined time for soil release.

From the commercial sector, various methods for cleaning industrial ovens and combi steamers are known. DE 196 144 39 discloses z. Example, a method which shows in the circulation process, the automatic spraying of liquid detergent by means of a spray nozzle. DE 198 38 864 A1 discloses a method in which alternately the liquid cleaner and decalcifier and water are sprayed as a rinse solution and acts for a certain period of time. Recent developments in the cleaning and descaling of commercial combi steamer release cleaner and descaling components at different times with different times, cf. DE 100 60 204 B4 , where the products are stored in sealed cartridges or tabs in water-soluble film directly in the interior of the device.

Although the commercial process in household appliances such. B. Haushaltsdampfgarer could be applied, but these are not currently encountered in domestic appliances in practice.

Disclosure of the invention

In view of the known from the prior art solutions, the present invention seeks to provide a cleaning method for home appliances used in household appliances, in particular Haushaltsgaröfen, which can be realized on the one hand with little additional investment and on the other hand, considerable advantages for the user in the cleaning in just these Household appliances.

• 1.) eine Neutralisation der im Programmschritt 1 verwendeten Reinigerlösung durchgeführt und/oder
• 2.) eine Entkalkung zum Ablösen mineralischer Rückstände (Kalk)

durchgeführt.According to the invention, a method for carrying out a partial / fully automatic chemical cleaning method is proposed, whereby cleaning steps are carried out in chronological succession. In a first program step of the inventively proposed cleaning method, the program step 1, a cleaning is carried out, which eliminates in particular organic residues (soils). In a second program step of the inventively proposed cleaning process, the program step 2, is

• 1.) carried out a neutralization of the cleaner used in the program step 1 and / or
• 2.) a decalcification to remove mineral residues (lime)

carried out.

The descaling in program step 2 is achieved by an excess of acid solution.

The proposed solution according to the invention is realized in an advantageous manner directly in the household appliance to be cleaned, in particular a Haushaltsgargerät by a special program control. Compared to pyrolytic cleaning, energy consumption and material stress are significantly reduced. The proposed solution according to the invention can be achieved without high technical complexity only by minor modifications to Haushaltsgargerät. In this case, reference is made to already built-in component for carrying out the method proposed according to the invention.

In an advantageous manner, unlike solutions known from the prior art, instead of a conventional sole decalcification, an upstream, efficient purification for removing organic residues (eg fats) can be carried out. In the program step 1, the solution proposed according to the invention uses a volatile / evaporable cleaning solution A for the more efficient removal of organic residues. The neutralization / descaling solution B used in excess in the second program step neutralizes / inactivates the cleaning solution A used in the first program step. The addition of the neutralization / descaling solution B takes place in an advantageous manner when prompted by the control of the household cooking appliance. The metered addition can be carried out in such a way that the metered addition of the cleaner solution A and neutralization and descaling solution B takes place in a depression in the bottom of the cooking chamber of the domestic appliance, in particular a steam cooker. The bottom of the recess in the cooking chamber is advantageously formed by a heating element, so that the metered into the bottom well detergent solution A and neutralization and descaling solution B can be heated quickly and evaporated within the cooking chamber.

Instead of adding the cleaning solution A into a depression in the bottom of the cooking chamber, the cleaning solution A as well as the neutralization / descaling solution B can be added via a filling shaft, which is followed by a metering line to the bottom depression. In a further embodiment, there is the possibility that the collected in the bottom recess of the cooking chamber detergent solution together with loosened deposits and the neutralization / descaling solution added in the second program step together with detached mineral deposits are all collected in the bottom well. Through a drain line and an integrated drain valve, the recess, which is introduced in the bottom of the cooking chamber, at periodic intervals, in particular at the end of a program step can be emptied.

Instead of emptying the depression in the bottom of the cooking chamber via a drain line, the spent cleaning solution in the bottom of the cooking chamber with the help of a sponge or the like, be taken or emptied.

The inventively proposed detergent solution A and neutralization and descaling solution B are heated by the heating element, which is located in the bottom or in the recess of the cooking chamber, and evaporated. The steam condenses on the cooking space delimiting and to be cleaned. The impeller, or the fan allows an optimal distribution of steam to the walls, or floor and ceiling surfaces of the cooking chamber.

Short description of the drawing

With reference to the drawing, the invention will be described below in more detail.

It shows:

1 a first embodiment of a household appliance with a recess in a bottom surface of a cooking chamber,

2 a further embodiment of a household appliance, are brought in the detergent solution and neutralization / descaling solution in a hopper and a dosing into the oven,

3 a variant of a household appliance, in which the introduced into the cooking cavity recess can be emptied via a drain line, in which a switching valve is integrated,

4 the program sequence in a program step 1 (cleaning) of the present invention proposed cleaning method and

5 the program sequence of a program step 2, within which a second cycle for neutralization or decalcification of the program step 1 according to 4 supplied cleaning solution represents.

variants

The representation according to 1 It can be seen that a Haushaltsgargerät, in particular a steamer, a cooking chamber includes.

1 shows a household appliance 10 , which is in particular a steamer, which is a housing 14 includes, in which a cooking space 12 located. The cooking space 12 is over a swiveling door 16 on the case 14 is posted, accessible. In the bottom of the cooking chamber 12 of the household appliance 10 , which is in particular a steamer, there is a circular recess formed here 22 , The depression 22 has a bottom surface into which a heater 24 is integrated, which is in particular an electric heater. The heating system 24 can be a part or the entire bottom surface of the recess 22 in the bottom of the cooking chamber 12 taking. In the oven 12 There is also an impeller 18 or a differently designed ventilation device, in which the cooking space 12 with the door closed 16 enclosed air can be distributed or circulated.

The representation according to 2 is a further embodiment of a household appliance, in particular a steamer, refer to.

In the in 2 illustrated embodiment is in the housing 14 of the household appliance 10 , which is in particular a steamer, a filling opening 26 educated. fill opening 26 provides access to a filling section 28 which is in an inclination within the housing 14 of the household appliance 10 runs. At the filling section 28 closes a substantially vertically downwardly extending metering 30 at. The dosing line 30 takes place at a confluence point 32 above a ground 34 into the depression 22 in the bottom of the cooking chamber 12 of the household appliance 10 ,

Also in the in 2 illustrated embodiment is in the housing 14 a controller with display 20 integrated, furthermore, located in a wall, the cooking space 12 of the household appliance 10 limited, a ventilation device, indicated by an impeller 18 ,

The representation according to 2 it can also be seen that the bottom surface of the recess 22 through the electric heater 24 is limited and one the depression 22 limiting side wall by reference numerals 36 is identified.

The representation according to 3 is a further embodiment of a household appliance, in particular a steamer, refer to.

As shown in the illustration 3 can be removed, according to this embodiment is also in the bottom of the cooking chamber 12 the depression 22 , which is circular here. The floor 34 the depression 22 is powered by an electrically heated heater 24 educated. In the bottom surface in the ground 34 the depression 22 there is a floor drain 38 to which a drain line 42 in which a valve 40 is included, is connected. According to this embodiment, in the recess 22 in the bottom of the cooking chamber 12 is formed, accumulated residues without manual intervention indirectly in the drain line 42 be disposed of. Alternatively to in 3 illustrated drain line 42 on the ground 34 the depression 22 is connected, it is possible in the example circular trained depression 22 in the bottom of the cooking chamber 12 absorbing element in the form of a sponge, which may be a disposable sponge for single use as well as for a rinsable reusable sponge.

The representations according to the 4 and 5 are to be taken in a schematic way the individual program steps, which are passed through in the program step 1 and the program step 2 of the present invention proposed cleaning method of household appliances.

The representation according to 4 is the program step 1 of the invention proposed cleaning method refer to.

As part of program step 1, cf. reference numeral 50 , a detergent addition takes place 60 , either immediately after opening the door 16 into the depression 22 in the bottom of the cooking chamber 12 by manual task, or, in the case of the variant of the household appliance 10 according to 2 , by entering a cleaning solution A, or in liquid form or in the form of a tab in the filling opening 26 of the filling shaft 28 , from where the cleaner solution A via the dosing line 30 the depression 22 in the bottom of the cooking chamber 12 is supplied.

At the addition of the cleaner solution 60 closes a start 62 a cleaning cycle 1 at. As part of this cleaning cycle 62 First, a heating of the example, electrically heated heating element 24 , so that in the depression 22 located cleaning solution A is heated and then in the oven 12 with the door closed 16 is evaporated. This is in 4 through the block 64 shown.

To ensure a uniform distribution of the present in vapor form detergent solution A within the cooking chamber 12 is about the controller 20 of the household appliance 10 , in particular a steamer, an impeller 18 or a differently configured circulating device controlled, so that a uniform circulation of the cooking chamber 12 evaporated cleaner solution A is achieved. The control of the impeller 18 , or the ventilation device, is in 4 through the block 66 characterized.

In a triggering phase 68 A condensation of the cleaner vapors of the cleaner solution A takes place on the surfaces that form the cooking chamber 12 limit. As a result, be loosened at this adhering soiling or contamination.

In a collection phase 70 becomes the soiled, condensed cleaning solution A, together with the soiling in the recess which is dissolved in it 22 in the bottom of the cooking chamber 12 collected.

After going through the steps 64 . 66 . 68 and 70 in the context of the first program step 50 an end query takes place 72 whether the program step 1, cf. reference numeral 50 according to 4 , to go through again or not. The end query 72 can be answered manually by the user or by means of a sensor, for example by means of a turbidity sensor.

If the program step 1, cf. reference numeral 50 , to finish, is added 74 the first program step 50 completed. Will the end query 72 in contrast, a return to the start of the cleaning cycle 1 follows 62 so that's in the recess 22 introduced cleaning solution 8th there heated and inside the cooking chamber 22 is evaporated. The warming 64 , the distribution 66 , the triggering phase 68 as well as the collection phase 70 can also be parallel processes.

From the illustration according to 5 is the program flow of a second program step of the invention proposed application method refer to.

The by reference 80 indicated program step 2 is used to neutralize the cleaning solution A, the program step 1, see reference numerals 50 according to 1 in the bottom of the cooking chamber 12 was added and a second function of decalcification.

With an addition 90 the neutralization / descaling solution B can this analogously to the cleaning solution A in the program step 1, reference numerals 60 in 4 , manually into the recess 22 in the bottom of the cooking chamber 12 be introduced, or via a filling opening 26 a to this subsequent filling section 28 via the dosing line 30 in the depression 22 in the bottom of the cooking chamber 12 be introduced.

After one by the addition of the neutralization / descaling solution B in the well 22 in the oven 12 there is an inactivation, ie a neutralization of the cleaning solution A, which in the program step 1, cf. reference numeral 50 in 4 was metered. This is in 5 through block 92 characterized.

After start 94 the cleaning cycle '2 is in the above manner in the recess 22 in the bottom of the cooking chamber 12 introduced neutralization / descaling solution B by those in the soil 34 the depression 22 taken in heating 24 heated and with the door closed 16 of the cooking chamber 12 vaporized in this, shown in 5 through block 96 , To improve the circulation of the evaporated neutralization / descaling solution B in the cooking chamber 12 this is in a boundary wall of the cooking chamber 12 taken in impeller 18 or alternatively designed ventilation and circulation device and that in the cooking chamber 12 contained mixture circulated in this, cf. position 98 in 5 ,

This is followed by a condensation and dissolution phase 100 while the present in vapor form neutralization / descaling solution B to the cooking chamber 12 condensing surfaces condensed and cleaner residues of the program step 1, see. position 50 in 4 , introduced detergent solution A neutralizes the adhering mineral deposits from the wall surfaces of the cooking chamber 12 trims delimiting walls.

In a collection phase 102 is the spent neutralization / descaling solution B, possibly detached mineral deposits and residues of cleaning solution A in the depression 22 in the bottom of the cooking chamber 12 washed away and collected there.

If the program step 2, compare reference numerals 80 , to finish, is added 106 the second program step 80 and ended the cleaning program. Will the end query 104 in contrast, a return to the start of the cleaning cycle '2 takes place at position 94 so that in the recess 22 introduced detergent solution A heated there and within the cooking chamber 22 is evaporated. A warming 96 , a distribution 98 , a triggering phase 100 as well as a collection phase 102 can also represent parallel processes.

Disposal of the used neutralization / descaling solution B, detached mineral residues, and possibly neutralized residues of cleaning solution A as well as organic residues removed from cleaning solution A from the depression 22 in the bottom of the cooking chamber can be done in different ways. It is possible, the spent solution or spent solutions A and B or adhering organic and mineral detached deposits by a manual from the depression 22 to be removed sponge from the oven 12 to remove or as in the embodiment according to 3 indicated the depression 22 by activation of by controlling the valve 40 in the drain line 42 to empty at periodic intervals.

The mineral deposits that are dissolved by the neutralization and descaling solution B, for example, may be lime or lime-like residues that are connected to the cooking chamber 12 have deposited limiting walls.

In addition to the described products for cleaning and decalcifying in liquid form, formats such as tabs or powders can alternatively be used. In this case, the detergent / descaling solution can be released by dissolving the powder or tabs before or during the process. The control of the dissolution time of the powder or the tab formats can be achieved by suitable additives. In particular, the retarding effect of paraffins, emulsifiers and polyalcohols, glycols may be mentioned here. Suitable additives are from the group of PVA, PVAL, glycerol, alkylene glycols and their polymers and / or non-ionic surfactants, polyalkylene glycols, waxes, long-chain fatty derivatives, polyacrylates, polyacrylate copolymers, PVP, Polyvinyl acetate, fatty acid alcohols, fatty alcohols, esters, ethers, diols or paraffins selected. In this case, the cleaner and / or the acid is present in tab form or in powder form, placed at a defined point "metering", which allows rapid dissolution and thus rapid product release.

For example, at the metering point there may be a heater that generates the product solution due to local heating. As a further possible metering point is a place in the pressure range of the impeller into consideration. Here, the high-energy, heated air allows the product to dissolve at the optimum time.

The release of the active substances can also be controlled by pH. Here, a change in the pH value, an improved solubility of the ingredients is achieved.

By influencing the dissolution time of the cleaner and / or acid solution, it is possible to place both products in the device at the same time before starting the cleaning cycle. This in turn allows the fully automatic procedure of the method, comprising the cleaning as program step 1, compare position 50 as well as the program step neutralization / descaling (program step 2), see position 80 ,

LIST OF REFERENCE NUMBERS

10

household appliance

12

oven

14

casing

16

door

18

Impeller (ventilation)

20

Panel / Display

22

deepening

24

heater

26

fill opening

28

reservoir section

30

dosing

32

Mouth point in depression 22

34

Bottom of the depression 22

36

Side wall of the depression 22

38

floor drain

40

Valve

42

drain line

50

Program step 1 (cleaning)

60

Add cleaner solution A

62

Start cleaning cycle 1

64

Heating Cleaner Solution A

66

Control impeller 18

68

Anlösephase

70

collection phase

72

End detection

74

End cleaning cycle 1

80

Program step 2 (neutralization / decalcification)

90

Addition of neutralization / descaling solution B

92

 Inactivation of detergent solution A

94

 Start cleaning cycle 2

96

 Heating and evaporation of the neutralization / descaling solution B

98

Control impeller 18

100

 Condensation and dissolution phase

102

 Collection phase spent solution B

104

 End detection

106

End of program step 2, 80

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 2006020883 A1 [0001]
• DE 19614439 A1 [0002, 0002]
• DE 19838864 A1 [0003, 0009]
• EP 1146290 A2 [0004]
• DE 10060204 B4 [0005, 0009]
• EP 0995951 B [0007]
• DE 10018466 B4 [0008]
• DE 19614439 [0009]

Claims (10)

Method for cleaning a household appliance ( 10 ), in particular a Haushaltsgargerätes with a cooking space ( 12 ) for receiving food to be prepared, with the following process steps: a) metering in a cleaning solution A ( 60 ) in the cooking chamber ( 12 ) and start ( 62 ) of a first cleaning cycle, b) evaporation ( 64 ) and distribution of the cleaning solution A ( 60 ) in the cooking chamber ( 12 ), c) redemption ( 68 ) and collect ( 70 ) of contamination in the cooking chamber ( 12 d) addition of neutralizer / descaling solution B (neutralizing detergent solution A) 90 ) and start a cleaning cycle (2) ( 94 ), e) evaporation ( 96 ) and distribution ( 98 ) of the neutralization / descaling solution B in the cooking chamber ( 12 ), f) dissolution of coverings ( 100 ) and g) Collection ( 102 ) the spent neutralization and descaling solution B together with loosened residues and deposits in the cooking chamber ( 12 ). A method according to claim 1, characterized in that the method steps a) to c) and d) to g) are carried out in chronological succession. Method according to one of the preceding claims, characterized in that according to method step d) the addition of the neutralization / descaling solution B is added with an excess of acids which neutralize the detergent solution A and / or inactivate. Method according to one or more of the preceding claims, characterized in that the distribution of cleaning solution A according to method step b) and the distribution of neutralization / descaling solution B according to method step e) by circulation of the air volume in the cooking chamber 12 by means of a fan or impeller ( 18 ) he follows. Method according to one or more of the preceding claims, characterized in that the neutralization / descaling solution B is an acid solution which, when requested by a controller 20 of the household appliance 10 is added. Method according to one or more of the preceding claims, characterized in that according to method step c) the collection of dissolved organic residues and the collection of detached mineral deposits and spent neutralization / descaling solution B in the well 22 of the cooking chamber 12 he follows. Method according to one or more of the preceding claims, characterized in that instead of product solutions, other formats, such as tabs or powders are used, which are brought into solution before and / or during the process. Method according to one or more of the preceding claims, characterized in that a product addition for the neutralization / decalcification takes place before the first program step together with the cleaner product and is activated only at the beginning of the second program step. Method according to one or more of the preceding claims, characterized in that the activation of the neutralization and / or decalcification product thermally by a separate heating or a higher temperature, mechanically by an impeller or by a pH change, or by a different solubility occurs. Method according to one of the preceding claims, characterized in that the dissolution time of the powder or tab formats by suitable additives from the group comprising: PVA, PVL, glycerol, alkylene glycols and their polymers and / or nonionic surfactants, polyalkylene glycols, waxes, long chain fatty derivatives, polyacrylates, polyacrylate, PVP, polyvinyl acetate, fatty acids, alcohols, fatty alcohols, esters, ethers, diols and / or paraffins is influenced ,

Images