fig1 shows a first kitchen situation , in which a user of a food processor 1 is preparing a preparation item 2 that exhibits several ingredients . the food processor 1 exhibits a vessel 3 along with a heater allocated to the vessel 3 . in addition , the food processor 1 exhibits a mixer whose end region designed as a blade set is arranged inside of the vessel 3 . in addition , the food processor 1 exhibits a conventional display 5 for selection menu display or command entry by the user . a switch 6 is further provided for turning the food processor 1 on and off . the user has a data communication device 4 , here a mobile phone , which has a communications link with the food processor 1 . the invention now functions in such a way that the user of the food processor 1 selects a recipe in the data memory of the food processor 1 , which he or she wishes to use to prepare a preparation item 2 . to this end , he or she uses the display 5 to select a recipe front a database . the food processor 1 displays the selected recipe with the ingredients contained therein on the display 5 . according to the recipe , the ingredients of the preparation item 2 contain potatoes and cauliflower , for example . the user now modifies this recipe in such a way as to use rice instead of potatoes . otherwise , the recipe as recorded in the data memory of the food processor 1 is to remain intact . during the preparation of the preparation item 2 , the food processor 1 alters the operating parameters so as to be suitable for the preparation of rice . to this end , the heater and mixer of the food processor 1 are controlled in such a way as to optimally boil the rice that replaced the potatoes . if the user now repeatedly switches the potatoes for rice in this or even other recipes , an evaluator and controller of the food processor 1 recognizes that the user essentially wants to replace the potatoes with rice . this is recorded in the data memory of the food processor 1 , so that the operating parameters of the food processor 1 , i . e ., here the mixer speed and heater temperature , for example , are controlled while executing the recipe in such a way as to successfully prepare the modified preparation item 2 . if necessary , consideration can also be given to the fact that the user repeatedly wishes to use a specific quantity of rice for a recipe in the same way . to this end , a weighing mechanism of the food processor 1 can measure the quantity of rice that the user puts into the vessel 3 . this quantity is recorded in the data memory of the food processor 1 , so that this quantity of rice is taken into account during future preparations . in addition , the food processor 1 stores the hour and weekday used for executing a recipe . in the example shown , the food processor 1 stores the fact that the user executes the corresponding recipe on a saturday at 2 p . m . if the user activates the switch 6 or display 5 of the food processor 1 later on , for example in the following week , on a saturday at 2 p . m ., or around noon , the food processor 1 retrieves the current hour , and checks the data recorded in the data memory for this hour and potentially this user , i . e ., recipes which the user executed on the very same weekday at around this hour . to allow the food processor 1 to recognize the user , he or she carries a data communication device 4 , here a mobile phone . the food processor 1 has a radio module that sends out electromagnetic waves , to the data communication device 4 . the data communication device 4 receives this signal and sends out a response signal , which contains information about the person of the user . the food processor 1 receives this response signal , and accesses those recipes within its data memory that were already executed once by this user . for example , in the exemplary embodiment shown , the data memory of the food processor 1 can contain a separate table for each user of the food processor 1 , which contains the recipes executed by the user in the past , sorted by weekday , hour of day or even the current outside temperature . if it is a hot day in summer , for example , the food processor 1 suggests different recipes to the user than for a cold winter day . fig2 shows a situation in which a user of the food processor 1 wishes to execute a recipe on a very hot summer evening , at around 9 p . m . the user carries a data communication device 4 , which identifies her to the food processor 1 . as soon as the user turns on the food processor 1 or gets into the radio range of the food processor 1 , the food processor 1 recognizes the presence of the user based on her data communication device 4 . the food processor 1 checks an internal calendar for the current hour and weekday , and queries a current outside temperature , e . g ., via a network connection . to this end , for example , the food processor 1 can be connected with a temperature sensor via communications technology , or access a database containing current temperatures for the region . as shown on fig3 , the data memory of the food processor 1 contains a table , which was generated based on the previous user behavior of the user . recipes executed by the user under similar conditions were derived from the repeated , similar user behavior for specific outside temperatures and times of day , and stored . for the current outside temperature of 25 ° and current hour of 9 p . m ., the user profile ( table ) contains the notation that the user wishes to prepare a salad along with ice cream as dessert . the food processor 1 thereupon retrieves corresponding recipes for salad or ice cream from the recipe database , puts them on the display 5 and , if necessary , prompts the user to select and / or confirm a corresponding recipe . the preparation of the preparation item 2 is then initiated . in addition , the operation of the food processor 1 is also controlled as a function of whether the user is currently in proximity to the food processor 1 . data communication with the data communication device 4 of the user allows the food processor 1 to recognize whether he or she is in close proximity to the food processor 1 , and can manually intervene in the preparation of the preparation item 2 . if he or she is not present , in the area of the food processor 1 , the food processor 1 can be operated in a safety mode , which only permits a specific maximum speed of the mixer of the food processor 1 or a maximum temperature of the food processor 1 . in critical situations , for example when a vessel 3 unevenly loaded with preparation items 2 causes the food processor 1 to start vibrating , a deactivation of the mixer can be provided . in this case , the user can receive a message on his or her data communication device 4 indicating that the food processor 1 will now be operated in a safety mode and / or be turned off . alternatively , it is also possible for the food processor 1 to wait for a specific period of time before switching to a safety mode , during which the user can act on the food processor 1 , for example after having received a message about the impending safety mode on his or her data communication device 4 . in the alternative case that the user is present in proximity to the food processor 1 , an acoustic signal , for example a beep , can indicate that a manual intervention is necessary . finally , a maintenance interval suitable for optimally keeping the food processor 1 ready for use can be calculated based on how often the food processor 1 is used by the user .
a method for operating a food processor driven by an electric motor for preparing a preparation item based on a recipe prepares the preparation item in a vessel of the food processor in one or more sequential preparation steps , in particular via mixing and / or heating and / or comminuting . in order to further support the user of the food processor during the preparation process , an operating parameter of the food processor is automatically controlled as a function of a repeated , similar behavior of the user while selecting or executing a recipe and / or of a presence of a user in the area of the food processor .