Method for controlling a cooking process

• US 20070000905A1
• Filed: 03/01/2004
• Published: 01/04/2007
• Est. Priority Date: 03/05/2003
• Status: Active Grant

• Current Assignee: Rational AG
• Original Assignee: Rational AG
• Inventors: Schreiner, Thomas, Greiner, Michael, Garner, Thomas, Klasmeier, Jurgen, Imgram, Judith, Wallenwein, Katharina, Jurgens, Andrea
• Granted Patent: US 7,196,292 B2
• Time in Patent Office: Days
• US Class Current: 219/401
• CPC Class Codes: A21B 3/04 Air-treatment devices for ovens, e.g. regulating humidity
• CPC Class Codes: A47J 37/00 Baking; Roasting; Grilling; Frying bakers' ovens, non-domestic baking apparatus or equipment A21B; domestic stoves or ranges F24B, F24C

Abstract

A method for controlling a cooking process in the cooking chamber of a cooking device according to the point of condensation inside the cooking device includes introducing at least one cooking item and at least one accessory such as a gastronomic container, a plate, tin plate, a support, a suspended ladder, a kiln tray and/or kiln tray cart and/or at least one reference body into the cooking chamber; at least partially determining during the cooking process at least one climate parameter, especially one relating to temperature and moisture, in the cooking area, or on the cooking item, or on the accessory or on the reference body; determining the actual extent by which the point of condensation is exceeded or is not achieved on the cooking item, accessory and/or reference body; and adapting the climate parameter in the cooking chamber during the cooking process according to the extent by which the point of condensation is exceeded or not achieved such that the climate inside the cooking chamber, especially the amount of moisture therein, the supply of moisture to the cooking chamber and/or the discharge of moisture from the cooking chamber is adjusted according to the point of condensation.

Claims

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17. Method for controlling a cooking process in a cooking space of a cooking appliance as a function of the dew point in the interior of the cooking appliance, comprising:

(a) introducing at least one food item to be cooked, at least one accessory, and at least one reference body with the same thermal behavior as that of the accessory into the cooking space;

(b) determining climate parameters of temperature and humidity at the reference body during the cooking process;

(c) using an evaluation unit to determine, as a function of the climate parameters determined in step (b), the actual extent to which the temperature at the reference body is above or below the dew point; and

(d) adjusting the humidity and/or the temperature in the cooking space during the cooking process as a function of the extent, determined in step (c), to which the temperature is above or below the dew point, so that the climate in the cooking space is controlled as a function of the dew point;

wherein a separate humidity sensor, a cooking process sensor, and/or a humidity measuring device belonging to the cooking appliance is used to measure the humidity in the cooking space and/or a separate temperature sensor and/or the cooking process sensor is used to measure the temperature and/or humidity, on the basis of which the dew point at the reference body, at the surface of the reference body, at the accessory, and/or at the surface of the reference body is determined, and wherein the cooking process sensor is inserted, introduced, or integrated at least partially into the accessory or the reference body.

18. Method according to claim 17, wherein the accessory is a gastronomy container or a plate or a baking sheet or a support or a set of horizontal bars from which food items can be suspended or a tray rack or a tray rack trolley.

19. Method according to claim 17, wherein, in step (d), the humidity in the cooking space, the input of moisture to the cooking space, and/or the discharge of moisture from the cooking space is regulated as a function of the dew point to obtain a desired climate in the cooking space.

20. Method according to claim 17, including repeating steps (b)-(d) at least once during the cooking process.

21. Method according to claim 17, including allowing steps (b)-(d) to proceed continuously at least during certain phases of the cooking process.

22. Method according to claim 17, wherein adjusting the humidity and/or the temperature in the cooking space so that the climate in the cooking space is controlled as a function of the dew point is based on a temperature behavior of the reference body.

23. Method according to claim 22, wherein the temperature behavior of the reference body comprises a warm-up behavior of the reference body.

24. Method according to claim 22, wherein adjusting the humidity and/or the temperature in the cooking space so that the climate in the cooking space is controlled as a function of the dew point is based on the temperature behavior of the reference body in correlation with a temperature behavior of the food being cooked in the cooking space.

25. Method according to claim 24, wherein the temperature behavior of the food being cooked comprises a warm-up behavior of the food being cooked.

26. Method according to claim 17, wherein the humidity and/or the temperature in the cooking space is adjusted in step (d) in such a way that the temperature does not exceed or fall below the dew point.

27. Method according to claim 17, wherein the humidity and/or the temperature in the cooking space is adjusted in step (d) in such a way that the temperature exceeds or falls below the dew point only to a predeterminable extent.

28. Method according to claim 17, further including discharging moisture from the cooking space when the temperature at the surface of the reference body falls below the dew point.

29. Method according to claim 17, further including introducing moisture into the cooking space when the temperature at the surface of the reference body reaches or exceeds the dew point.

30. Method according to claim 17, wherein the reference body and/or the accessory is subjected to more-or-less the same pretreatment as the food to be cooked before the reference body and/or the accessory is introduced into the cooking space.

31. Method according to claim 17, wherein the reference body and/or the accessory is subjected to more-or-less the same temperature treatment as the food to be cooked before the reference body and/or the accessory is introduced into the cooking space.

32. Method according to claim 17, wherein at least part of an accessory is used as the reference body.

33. Method according to claim 17, wherein one or more of the humidity sensor, the cooking process sensor, the humidity measuring device, and/or the temperature sensor is connected to an appliance control unit, which operates on an open-loop and/or a closed-loop control principle.

34. Method according to claim 17, wherein the temperature of the accessory and/or the humidity of the cooking space is adjusted during cooling of the cooked food in such a way that the temperature does not exceed the dew point at the accessory.

35. Method according to claim 17, wherein the temperature behavior of the accessory and/or of the reference body is known, filed, and/or retrieved in itself.

36. Method according to claim 35, wherein the temperature behavior of the accessory and/or of the reference body is known, filed, and/or retrieved in correlation with the food to be cooked and/or in correlation with a standardized food to be cooked.

37. Method according to claim 35, wherein the temperature behavior of the accessory and/or the reference body is known, filed, and/or retrieved under consideration of the amount of food loaded into the cooking space.

38. Method according to claim 17, including using at least one electrical conductivity measurement at the reference body and/or made by a separate conductivity measuring device to determine the moisture content in the cooking space.

39. Method according to claim 38, wherein the electrical conductivity measurement is made near the surface of the reference body to determine the moisture content in the cooking space at the surface of the reference body.

40. Method according to claim 38, wherein the electrical conductivity measurement is made to determine whether the temperature is above or below the dew point.