Method for operating a household steam treatment device and household steam treatment device

Description

[0001] The invention relates to a method for operating a household steam treatment appliance having a steam generator connected to a water tank and having a steam treatment chamber, in which, upon an instruction to introduce steam, water is heated to an evaporation temperature and the steam generated thereby is introduced into the steam treatment chamber. The invention also relates to a household steam treatment appliance having a steam generator connected to a water tank, a steam treatment chamber, a user interface, and a control device, wherein the control device is configured to carry out the method. The invention is particularly advantageously applicable to stand-alone steam treatment appliances and to steam treatment combination appliances, i.e., cooking appliances such as ovens and / or microwave ovens that have an additional steam treatment function.The invention is particularly advantageously applicable for baking pasta, for example bread, in particular together with preheating of the steam treatment chamber.

[0002] To bake bread as described in recipes, a large amount of steam should be introduced into the oven as quickly as possible after preheating the oven and applied to the cold bread dough to achieve the desired positive effects through condensation of the steam on the surface of the bread dough. However, this has so far been cumbersome and / or ineffective with household steam treatment appliances, which can only provide a low heat output compared to professional bread ovens.

[0003] EP 3 207 801 A1 discloses a method for operating a household steam treatment appliance with a steam treatment chamber and with a steam generator arranged outside the steam treatment chamber and connected to a water tank. Water in the water tank is heated to an elevated preheating temperature below an evaporation temperature, the water is maintained there at the preheating temperature, and upon an instruction to introduce steam, the preheated water is fed into the steam generator, where it is further heated to an evaporation temperature, and the generated steam is introduced into the steam treatment chamber. JP 2018 096569 A discloses a method for operating a commercial steam treatment appliance.

[0004] It is the TaskThe present invention aims to at least partially overcome the disadvantages of the prior art and, in particular, to provide a way for household steam treatment appliances with low evaporator heating power to introduce a large amount of steam into the steam treatment chamber in a short time, even when the heating power available for heating the water is comparatively low, e.g., in comparison to professional bread ovens.

[0005] This object is achieved according to the features of the independent claims.

[0006] Advantageous embodiments are the subject of the dependent claims.

[0007] The object is achieved by a method for operating a household steam treatment appliance with a steam treatment chamber and with a steam generator arranged outside the steam treatment chamber, which is connected to a water tank, wherein in the method a) water is heated by means of the steam generator to an elevated temperature ("preheating temperature") below an evaporation temperature, b) the heated water is maintained at the elevated temperature and c) upon an instruction to introduce steam, the heated water is further heated to an evaporation temperature and the generated steam is the steam treatment room, whereby the steam is introduced in the form of at least one steam burst.

[0008] In step a), it can be provided that the steam generator is switched off after reaching a temperature measured, for example, by a temperature sensor.

[0009] However, it is also conceivable that in step a), shutdown occurs after a certain time based on at least one parameter, where, for example, the heating output of the steam generator, a water quantity in the steam generator, or the like can be provided as a parameter. Thus, the shutdown time of the steam generator could then be calculated in advance based on knowledge of the heating output of the evaporator or the water quantity in it. This could advantageously eliminate the need for a temperature sensor.

[0010] In step b), the temperature can be maintained by cycling, i.e. repeatedly switching the steam generator on and off. If the temperature is measured by a temperature sensor or other suitable detection device, the steam generator can be switched off once a certain temperature is reached, and then switched back on when the temperature falls below a certain level. In the case of time-controlled control based on the parameters mentioned above, cycling of the steam generator can also be provided, with the steam generator then being switched on and off based on a specific time. In this case, the specific time can be calculated based on the parameters mentioned above.

[0011] This process has the advantage that, even using a steam generator located outside the steam treatment chamber, a large amount of steam can be introduced into the steam treatment chamber very quickly upon the instruction to introduce steam. This takes advantage of the fact that the water has already been heated to the higher preheating temperature (particularly compared to room temperature) in step a), and thus only a comparatively small amount of energy is required to reach the boiling or evaporation temperature in step c), and this amount of energy can be introduced into the water very quickly. This, in turn, means that large amounts of steam can be introduced or introduced into the treatment chamber very quickly. The release of large amounts of steam shortly after the instruction is given is supported by the fact that the water at the preheating temperature is usually almost completely warmed through.

[0012] By means of the above method, in step c) upon the instruction to introduce steam, the steam can be introduced into the steam treatment chamber in large quantities within five seconds or less, in particular within three seconds or less. If, on the other hand, the water were not preheated, it would typically take approximately 90 seconds to provide larger quantities of steam. Such a long time delay can result in disadvantages during food preparation. For example, when baking bread from a bread dough without using the above method, the surface of the bread dough heats up faster than a steam atmosphere can be built up in the steam treatment chamber, which disadvantageously prevents sufficient condensation of the hot steam on the surface. The above method therefore enables improved results during food preparation.This applies in particular if the steam treatment room has been preheated beforehand.

[0013] A further advantage of the process is that the preheating of the water itself carried out in step a) is not time-critical and can also be carried out with comparatively low heating power, e.g., with a heating power of 1500 W or less, in particular with 1200 W or less, and in particular with 900 W or less. These comparatively low heating powers are also sufficient to heat the water to its evaporation temperature in step c) in a short time (e.g., within three seconds). In contrast, professional steam treatment devices and some household steam cooking appliances typically have a usable heating power ("evaporator power" or "evaporator heating power") of 2700 W and also have a fixed water connection to continuously generate steam directly from cold water.

[0014] Another advantage of the process is that, due to the arrangement of the steam generator or evaporator outside the steam treatment chamber, the time of steam generation can basically be chosen arbitrarily. This is in contrast to steam treatment devices with a water bowl located in the steam treatment chamber. With devices with a water bowl, a targeted release of steam is only possible when the steam treatment chamber is cold or slightly heated, as otherwise the water contained therein will evaporate automatically. Thus, with devices with a water bowl, a targeted addition of steam at a specific time is practically impossible if the temperature of the treatment chamber is above the evaporation temperature of water, which is the case with many recipes that require preheating.The present method, however, can be used regardless of the temperature of the treatment room and can therefore be used in combination with all food treatment modes or heating modes, e.g. in all operating modes of an oven with steam treatment function such as top heat, bottom heat, grill, hot air mode, etc.

[0015] Another advantage over appliances with a water bowl is that the steam generator can be automatically refilled with water from the water tank, without the need to open the cooking chamber door. Furthermore, the filling volume of a water tank is typically considerably larger than that of a typical water bowl (e.g., > 1 | compared to approximately 300 ml), so that using the above method, more steam can be introduced into the steam treatment chamber without user intervention.

[0016] This method is particularly advantageous for baking pasta, especially bread, rolls, croissants, etc., since rapid steaming after the dough is placed in the preheated steam treatment chamber is required for particularly good baking results (high crispness, high visual quality, etc.). In particular, there are pasta recipes that require a preheated steam treatment chamber to prevent the pasta from spreading.

[0017] Since the process can also be carried out with a steam treatment chamber preheated to a temperature above the evaporation temperature of water, there is the further advantage when baking pasta that it is possible to use a bread baking stone, which requires preheating.

[0018] It is therefore an advantageous embodiment that the method is carried out together with preheating of the steam treatment chamber.

[0019] However, the present process is not limited to steaming pasta and can be performed with any desired food or even other household items. The process can also be performed without preheating the steaming chamber. The process can also be referred to as a "rapid steaming process" or "rapid steaming process." Step a) can also be referred to as a "preheating step," and step b) can also be referred to as a "holding step." Step c) can also be referred to as a "steaming step" or "steam introduction step."

[0020] The household steam treatment appliance can be a dedicated steam treatment appliance. To combine steam treatment with higher temperatures in the steam treatment chamber, it is advantageous for the household steam treatment appliance to be a cooking appliance with a steam treatment function, e.g., an oven with switchable steam treatment functionality (also referred to as "added steam"), a microwave oven with switchable steam treatment functionality, etc. Particularly in the case of a steam treatment combination appliance, the steam treatment chamber can also be referred to as a cooking chamber or oven chamber.

[0021] The steam generator or evaporator can be a boiler or a continuous-flow heater. The steam generator can, in particular, comprise a steam generation chamber and at least one electrically operated heating element for heating the water in the steam generation chamber. The water to be heated in the steam generator is supplied from the water tank, e.g., by gravity or by means of a pump. The steam generated in the steam generation chamber is directed into the steam treatment chamber—if necessary, via a shut-off valve.

[0022] The water tank of the household steam treatment device can be permanently installed within the device, allowing the user to fill it with water via a filler opening or a hose. Alternatively, the water tank can be removed for filling and, if necessary, cleaning.

[0023] A further development is that the household steam treatment device is not connected to a fixed water supply, meaning it does not have a fixed water connection. Compared to devices with a fixed water connection, this offers the advantage of particularly simple installation.

[0024] An alternative development is that the household steam treatment device has a fixed water connection, via which the water tank can be filled manually or automatically on the device side.

[0025] Maintaining the heated water at the elevated temperature in step b) implies that the household steam treatment appliance is configured to maintain the water at the preheating temperature. If a user issues the instruction to introduce steam immediately after reaching the preheating temperature in step a), or if the instruction is given programmatically immediately after reaching the preheating temperature in step a), step b) is effectively skipped or a corresponding holding time of zero seconds is set.

[0026] It is a further development that if a user gives an instruction to introduce steam by means of "quick steaming" or "quick humidification" even though the temperature in step a) has not yet reached the preheating temperature, a message is issued that this function is not yet available and / or this function will only be triggered when the preheating temperature is reached, so step b) is skipped here too.

[0027] In one embodiment, the water is heated to the preheating temperature in a controlled manner, e.g., with a predetermined heating output or a predetermined heating output profile (e.g., including a heating duration). In one embodiment, the heating output or the heating output profile are dependent on a fill level in the steam generator. This embodiment is advantageous when the temperature of the water in the steam generator, particularly in its steam generation chamber, cannot be sensed or cannot be sensed accurately enough. In one embodiment, the fill level can be determined using a fill level sensor.

[0028] A further development is that the water is heated to the preheating temperature in a controlled manner and maintained there. This development is advantageous because the preheating temperature can be maintained with particular precision. This development can be used in particular when the temperature of the water in the steam generator can be measured with sufficient accuracy, for example, using a temperature sensor.

[0029] In one embodiment, before step a) water is fed from the water tank into a steam generation chamber of the steam generator, in step a) the water in the steam generation chamber is heated to the elevated temperature and in step b) is held there. This enables particularly rapid heating to the preheating temperature and holding at the preheating temperature even with a comparatively low heating output. This takes advantage of the fact that the water tank typically has a noticeably larger filling volume than the steam generation chamber of the steam generator. The comparatively large water tank (which can have a volume of 1 liter or more, for example) enables automatic refilling of the steam generation chamber of the steam generator when the steam generation chamber is empty or almost empty.In addition, the water tank allows for practical purposes in a household to dispense with a fixed water connection without sacrificing convenience. However, a fixed water connection can still be used to fill the water tank. It is also possible to heat the water in the water tank itself to a higher temperature.

[0030] In one embodiment, the preheating temperature is no more than 10°C below the evaporation temperature, in particular only approximately 5°C below the evaporation temperature. This has the advantage that the water is already at such a high preheating temperature before the steaming is triggered in step c) that only a small amount of additional energy is required to raise the preheating temperature to the evaporation temperature. On the other hand, at such a preheating temperature, steam is advantageously not yet generated or is generated only in small quantities, so that no undesirable or unnecessary steam treatment effect occurs in the treatment chamber. Furthermore, the water in the steam generator is not consumed, or is consumed only noticeably.

[0031] One embodiment is that the elevated temperature or preheating temperature is at least 90°C, in particular approximately 95°C. This assumes an evaporation temperature of 100°C. However, the evaporation temperature may also deviate from the normal evaporation temperature of 100°C, for example, depending on the typical air pressure at the installation location of the steam treatment device.

[0032] In a further development, a steam connection between the steam generator and the steam treatment chamber can be shut off using a valve to prevent steam from entering the steam treatment chamber. The valve can be closed during steps a) and b) and only open upon instruction from step c). This has the advantage of reliably preventing unwanted steam from entering the steam treatment chamber.

[0033] One embodiment is that in step c), the water is heated to the evaporation temperature using the greatest possible available heating power. This achieves the advantage of keeping the time delay between the instruction to introduce the steam and the actual introduction of large quantities of steam into the steam treatment chamber particularly short. This delay can thus be, in particular, five seconds or less, particularly three seconds or less.

[0034] The maximum available heating power in step c) can be, for example, 1500 W or less, in particular 1200 W or less, in particular 1000 W or less, in particular 900 W or less, in particular 800 W or less. This achieves the advantage that the steam generator can be designed comparatively inexpensively and compactly. The preheating of the water itself performed in step a) is not time-critical and can therefore be carried out in a user-friendly manner even with a comparatively low heating power.

[0035] In a further development, in step a), the water is heated to the preheating temperature using the highest possible available heating power. This has the advantage that the preheating temperature is reached particularly quickly in preheating step a). The corresponding heating power can correspond to the heating power from step c).

[0036] One embodiment provides that the process is activated or started in response to a user input. A user can therefore trigger the process specifically. This has the advantage that the amount of energy required to reach the preheating temperature is only consumed when it is actually needed. Activating the process in response to a user input can mean that the process is activated immediately or directly in response to the user input, e.g. by a user actuating a corresponding actuating device (e.g. a button, a touch-sensitive control panel, etc.) (manual actuation). This embodiment can also mean that a user starts or activating a cooking program which then triggers the process, i.e. that the process is indirectly activated or started in response to a user input.

[0037] It is an embodiment that the instruction to introduce the steam is given by the user, in particular immediately or directly in response to the user input, e.g. by a user actuating a corresponding actuating device (e.g. a button, a touch-sensitive control panel, etc.) (manual actuation).

[0038] An alternative or additional design is that the instruction to introduce steam is given by the device, particularly by program control. This allows the rapid steaming of the steam treatment chamber to be precisely coordinated with a specific steam treatment process.

[0039] It is also possible to combine the user-supplied instruction to introduce steam with a program-controlled instruction. For example, a steam treatment program can be started that uses the rapid steaming process, e.g., a bread baking program. The program can be configured so that, after its start, it executes steps a) and b) and then waits for the steam treatment chamber door to be closed manually. The temperature can then be raised to the evaporation temperature immediately or without a time delay.

[0040] According to the invention, in step c) the steam is introduced into the steam treatment chamber in the form of at least one steam burst. This has the advantage that the amount of steam can be dosed particularly well in terms of quantity and time and, in addition, steam can be introduced into the steam treatment chamber if required by means of several steam bursts over a longer period of time than with continuous steam introduction.

[0041] One embodiment allows a number, duration, and / or timing of at least one steam burst to be set. This advantageously provides a user or a program with the ability to precisely control the amount of steam introduced into the steam treatment chamber and adapt it to the cooking process, etc.

[0042] It is an embodiment that the amount of steam that can be released into the steam treatment chamber during step c) of the method is limited.

[0043] It is an embodiment that a preheating function is activated before step c) and the instruction to introduce the steam in step c) occurs upon completion of the preheating function, in particular upon closing the door. This achieves the advantage that the method can be combined with preheating, in particular for baking pasta. In particular, steam can be introduced into the steam treatment chamber particularly advantageously immediately after the preheated steam treatment chamber has been loaded with food, in particular within no more than five seconds, in particular within no more than three seconds, after the instruction has been issued. The instruction can be given for a particularly short time delay due to the closing of the door. It is a further development that the method can be carried out together with the preheating or within a predetermined period of time in relation to the start of the preheating (ie, before or after the start of preheating).

[0044] The object is also achieved by a household steam treatment device comprising a steam generator connected to a water tank, a steam treatment chamber, a user interface, and a control device, wherein the control device is configured to carry out the method as described above. The household steam treatment device can be designed analogously to the method and has the same advantages.

[0045] It is an embodiment that the household steam treatment appliance is an oven with a steam treatment functionality and a preheating functionality.

[0046] One embodiment of the household steam treatment appliance is that it has a preheating function and is equipped, or can be equipped, with a so-called "bread baking stone." This provides the advantage that pasta can also be prepared on the bread baking stone, which requires preheating, and can also be effectively moistened with steam using the process. This achieves a particularly good preparation result.

[0047] The above-described properties, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description of an embodiment, which is explained in more detail in connection with the drawings. Fig.1 shows a sectional side view of a household steam treatment device; and Fig.2 shows a possible process sequence for carrying out a rapid steaming of a steam treatment chamber of the household steam treatment device from Fig.1 .

[0048] Fig.1 shows a household steam treatment appliance 1, comprising a steam generator 4 connected to a water tank 2 via a pump 3. The water tank 2 can be filled with water W by a user and, for example, can be removed for this purpose. The household steam treatment appliance 1, purely by way of example, does not have a fixed water connection. The household steam treatment appliance 1 can be an oven with an additional steam treatment function.

[0049] By operating the pump 3, water can be pumped from the water tank 2 into a steam generation chamber 5 of the steam generator 4. The water W in the steam generation chamber 5 can be heated to a specific target temperature by heating elements (not shown) of the steam generator 4. For this purpose, the steam generator 4 can optionally have a temperature sensor. A maximum heating output is, for example, 1200 W. The steam generator 4 can also optionally have a fill level sensor (not shown) for sensing the fill level of water W in the steam generation chamber 5. The operation of the pump 3 and the steam generator 4 can be controlled via a control device 6.

[0050] Steam D generated in the steam generation chamber 5 by heating the water W enters a steam treatment chamber 7. The steam access between the steam generator 4 and the steam treatment chamber 7 can be permanently open or selectively openable and closable, e.g., by means of a valve (not shown). The steam treatment chamber 7 typically has a front-facing loading opening 8, which can be closed by means of a door 9. The door 9 can be equipped with a door contact switch (not shown), via which the control device 6 can detect whether the door 9 is closed.

[0051] The control device 6 is also connected to a user interface 10 arranged on the front, which can be designed, for example, as a touch-sensitive screen or similar. The control device 6 can also be connected to a communication device, in particular a wireless one (e.g., a WiFi module or a Bluetooth module, not shown), so that the household steam treatment device 1 can also be remotely monitored and / or remotely controlled, for example, from a mobile user device such as a smartphone, etc.

[0052] Fig.2 shows a possible process sequence for carrying out a rapid steaming of the steam treatment chamber 7 of the household steam treatment device 1.

[0053] In step S1, a rapid steaming process is started or activated. This can be done, for example, by a user making a corresponding user input via the user interface 10 or remotely via a smartphone or similar device.

[0054] In a step S2, if the steam generation chamber 5 is not already filled with a sufficient amount of water W, water W is fed from the water tank 2 into the steam generation chamber 5 by operating the pump 3.

[0055] In a step S3, the water W in the steam generation chamber 5 is heated to an elevated preheating temperature of at least 90°C, in particular 95°C. The preheating temperature is below a boiling or evaporation temperature, which is typically approximately 100°C. At this point, no or only a very small amount of water vapor enters the steam treatment chamber 7.

[0056] The heating line introduced into the steam generation chamber 5 or into the water W contained therein in step S3 is advantageously high in order to achieve the shortest possible time ("preheating time") until the preheating temperature is reached, in particular the greatest possible available heating power, e.g. 1200 W.

[0057] In a step S4, the water in the steam generation chamber 5 is kept at the preheating temperature. Here, too, no or only a very small amount of water vapor enters the steam treatment chamber 7.

[0058] In a step S5, it is queried whether an instruction is given to specifically introduce steam D into the steam treatment chamber 7. The instruction can be given or carried out directly by a user (by manual operation, voice control, etc.) or by the device, in particular program-controlled.

[0059] If the instruction from step S5 is issued ("Yes"), in a step S6, the water W in the steam generation chamber 5 is further heated so that it reaches its evaporation temperature. Since only a comparatively small amount of energy is required to reach the evaporation temperature and the water W in the steam generation chamber 5 is also practically completely heated to the preheating temperature, water vapor D is introduced or introduced into the steam treatment chamber 7 in large quantities in a very short time after the instruction is issued.

[0060] The heating line introduced in step S6 into the steam generation chamber 5 or into the water W therein is advantageously high in order to achieve the shortest possible time until the evaporation temperature is reached and to provide a particularly large amount of steam, in particular the greatest possible available heating power.

[0061] In step S6, the steam is introduced into the steam treatment chamber 7 in the form of at least one steam burst. The number and / or duration of the at least one steam burst can be set in a further development, e.g., by the user via the user interface 10, remotely via a smartphone or similar device, and / or programmatically. In particular, it is generally possible to perform any number of steam bursts (e.g., even more than three) if the amount of water available in the steam generation chamber 5 is sufficient.

[0062] Once the steam generation chamber 5 has been emptied, the process can be repeated, either initiated by a user or initiated by the device, e.g., program-controlled. The door 9 does not need to be opened for this purpose.

[0063] In addition, the total amount of steam that can be delivered into the steam treatment chamber 7 in step S6 during a rapid steaming process can be limited, e.g. to a steam amount that can be achieved without refilling the steam generation chamber 5 or to a steam amount that can be pumped from the water tank 2.

[0064] If no instruction is given in step S5 ("N"), the water is kept at the preheating temperature in step S4 and continues to be monitored for the instruction to be given.

[0065] In a step S7 following step S6, the rapid steaming process is terminated.

[0066] Of course, the present invention is not limited to the embodiment shown.

[0067] Thus, the illustrated embodiment can be executed in conjunction with preheating. In particular, a preheating function can be activated before step S5 or S6. The instruction to introduce steam in step S5 can, for example, be given upon completion of the preheating function, particularly on the appliance side, when the door is closed.

[0068] In general, "a", "an", etc. can be understood as a singular or a plural, in particular in the sense of "at least one" or "one or more", etc., as long as this is not explicitly excluded, e.g. by the expression "exactly one", etc.

[0069] A numerical value may also include the exact number stated as well as a usual tolerance range, as long as this is not explicitly excluded. List of reference symbols

[0070] 1 Household steam treatment device 2 Water tank 3 Pump 4 Steam generator 5 Steam generation chamber 6 Control unit 7 Steam treatment chamber 8 Loading opening 9 Door 10 User interface S1-S7 Process steps D Steam W Water

Claims

1. Method (S1-S7) for operating a household steam treatment appliance (1) with a steam treatment compartment (7) and with a steam generator (4) which is arranged outside of the steam treatment compartment (7) and connected to a water tank (2), wherein, with the method a) water (W) is heated to an increased preheating temperature below an evaporation temperature (S3) by means of the steam generator (4), b) the water (W) is kept at the preheating temperature (S4) and c) in response to an instruction to introduce water vapour (D) (S5), the water (W) in the steam generator (4) is further heated to an evaporation temperature and the generated water vapour (D) is introduced into the steam treatment compartment (7) (S6), wherein the water vapour (D) is introduced (S6) in the form of at least one steam jet.

2. Method (S1-S7) according to claim 1, in which the preheating temperature is no more than 10°C below the evaporation temperature, in particular approx. 5°C below the evaporation temperature.

3. Method (S1-S7) according to one of the preceding claims, in which in step c), the heated water (W) is heated (S6) to the evaporation temperature with the largest possible available heat output.

4. Method (S1-S7) according to claims 2 and 3, in which in response to the instruction to introduce water vapour, the water vapour (D) is introduced into the steam treatment compartment (7) within five seconds or less, in particular within three seconds or less.

5. Method (S1-S7) according to one of the preceding claims, in which the method (S1-S7) is activated in response to a user input (S1).

6. Method (S1-S7) according to one of the preceding claims, in which the instruction to introduce water vapour (D) in step c) is carried out (S5) by the user.

7. Method (S1-S7) according to one of the preceding claims, in which the instruction to introduce water vapour (D) in step c) is carried out (S5) on the appliance side.

8. Method (S1-S7) according to one of the preceding claims, in which a number and / or a duration of the at least one steam jet is adjusted.

9. Method (S1-S7) according to one of the preceding claims, in which a quantity of steam which can be output into the steam treatment compartment (7) during the method is restricted.

10. Method (S1-S7) according to one of the preceding claims, in which the method (S1-S7) is performed together with a preheating of the steam treatment compartment (7).

11. Method (S1-S7) according to claims 7 and 10, in which - a preheating function is activated before step c) and - the instruction to introduce water vapour (D) in step c) is carried out by terminating the preheating function.

12. Method according to claim 11, in which the instruction to introduce the water vapour (D) in step c) is carried out after loading the preheated steam treatment compartment (7) on the appliance side by closing a door (9) sealing off the steam treatment compartment (7).

13. Method (S1-S7) according to one of the preceding claims, in which the method (S1-S7) is performed to cook dough-based food, in particular by using a bread baking stone.

14. Household steam treatment appliance (1), having a steam generator (4) connected to a water tank (2), a steam treatment compartment (7), a user interface (10) and a control facility (6), characterised in that the control facility (6) is configured to carry out the method (S1-S11 according to one of the preceding claims.

15. Household steam treatment appliance (1) according to claim 14, characterised in that the household stream treatment appliance (1) is a baking oven with a steam treatment functionality and a preheating functionality.