Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C15/00—Details
  • F24C15/008—Illumination for oven cavities
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C15/00—Details
  • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
  • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
  • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising

Definitions

• the invention relates to steam cookers, in particular Steam ovens with an oven muffle, which is a steam cooker for steaming food in the cooking space of the Have device and a lighting device arranged in the cooking space to illuminate the cooking space and / or a fan for circulating air or hot air operation include.
• Steamers are facilities where food is in hot steam can be cooked. When operating the steam cooker the cooking chamber is filled with steam, by a steam generator unit in the cooking space or can be arranged outside of this is generated. Combined steam cookers are also common, in which other operating phases, for example a hot air operation for baking or roasting. Steamers are in the European patent application EP 0894460 A1 and the publications mentioned therein described.
• Ovens are ovens in which food is cooked in a cooking space become.
• the cooking space is of an oven muffle, in which the food to be cooked can be brought in, enclosed and has a door to open and close the cooking compartment.
• an oven Devices can use different cooking techniques individually or in Combination can be applied. These include, for example the top and / or bottom heat, a grill device, a hot air operation, a microwave or that Steam cooking. In the latter case, the oven is called one Steam oven.
• the lighting device with steam ovens and other ovens at the same time switched on with the heating source provided for the cooking process and switched off together with this.
• the lighting device is therefore always in operation albeit the oven to prepare a dish used and supplied with energy for this, and will together with the heating or the cooking device used in each case switched off.
• incandescent lamps are usually used for the lighting of cooking rooms of ovens incandescent lamps as lighting devices used.
• the energy consumption of these lamps is typically in the range between 5 and 80 W.
• Ovens can also be several, in different places Arranged incandescent lamps are used, which on the one hand the lighting even if a light bulb fails secured and on the other hand a more even and with less shadowing illumination of the cooking space is achieved.
• the present invention takes this state into account the technology is based on the task of a steam cooker create that operated at low temperatures and its cooking space temperature, especially at low temperatures, can be regulated more precisely.
• a steam cooker especially a steam oven with an oven muffle
• a steam cooker for steam cooking from Food in the oven of the appliance including one in the oven arranged lighting device for illuminating the Cooking space and / or a fan for a convection or Hot air operation
• there be a control device has, by means of which the lighting device and / or the fan when the steam cooker is operating, with low energy supply requirements for the cooking temperature is automatically controllable.
• the Fan of the circulating air or hot air device to the Heating the cooking space helps, even when the hot air is heated is switched off.
• the warming is based on im Findings found within the scope of the invention are not primarily on the heat loss of the electric motor with which the fan is driven but on the mechanical Power output of the motor shaft. This is typically in the range of 25 W and is in the cooking space the fan blades are converted into air movements.
• the lighting device and / or the Fan when operating the steam cooker, with low energy supply requirement for the cooking temperature automatically is controllable.
• the lighting device and the fan an undesirable or annoying for some operating modes Can represent heat source to that in each Operation required heating source is added.
• the unwanted or disturbing impairments of such to the heating source that is actually required Heat sources that are sources other than the lighting device and can include the fan, are eliminated or reduced according to the invention.
• This can also be used with other devices for preparing Food as steam cookers, for example in ovens without a steam cooker.
• the automatic control of the lighting device and / or the fan can be done in different ways, for example by switching off, switching on and off Switch off (if necessary with a controlled or regulated one Clock ratio) or by operation with reduced Power.
• Another advantageous feature can be that the lighting device and / or the fan depending on the cooking space temperature, in particular depending on a specified limit value for the cooking space temperature, is controlled automatically.
• the default Limit, depending on which the lighting device is controlled automatically, lies for practical purposes advantageously between 30 ° C and 70 ° C, preferably between 50 ° C and 65 ° C.
• the invention Control can also be carried out at higher cooking chamber temperatures to be beneficial to an operation at a exact or small fluctuations in temperature to ensure.
• the invention is particularly for steam cookers from Advantage, since the generation and supply of the Steam can be a heat or heating source.
• the steam generation takes place on a radiator instead of being applied to the water. If the Radiator is not or only slightly heated, is not Steam generation possible, so that no high relative Humidity in the cooking space can be achieved.
• This also applies to steam cookers with steam cookers, where the steam is generated in an external water tank takes place, since the introduction of Steam in the cooking space causes a rise in temperature, which along with the performance of the lighting device or the optionally switched on fan Hot air device is too high. With some steam cookers is the steam generator in the cooking space self-arranged.
• steam generating devices have the conversion of the supplied water to steam is high Surface temperature, preferably above 100 ° C.
• the Steam generation can be continuous or intermittent respectively. There is heat input through the lighting device or adding a fan is done by this Heat sources increases the temperature and makes regulation difficult.
• An advantageous embodiment of the invention can be that the lighting device and / or the fan is switched off in the steam cooking mode becomes.
• a first advantageous embodiment can be that the lighting device and / or the fan during of the entire operation with low energy consumption for the cooking temperature is switched off.
• a second advantageous embodiment may be that Lighting device and / or the fan during of operation with low energy requirements for the Cooking temperature is switched on and off at intervals.
• Another advantageous embodiment may be that the lighting device and / or the fan during of operation with low energy requirements for the cooking temperature is operated with reduced power becomes.
• the lighting device and / or the fan is automatically switched off when the actual temperature, i.e. the currently measured inside temperature of the Cooking space, falls below a predetermined limit. This ensures that at low operating temperatures the lighting device or the fan is switched off and does not contribute to warming.
• the lighting device is switched on or the fan when exceeded the limit for an extension of the duration which may elapse until the steamer again reaches a target temperature below the limit.
• the lighting device and / or the Fan when setting a target temperature the is less than a predetermined limit, automatically is turned off. This will already be when setting the operating temperature determines whether the lighting device or the fan is switched on or off is.
• the Control circuit influenced such that the lighting device or the fan when starting the heating below the limit is not switched on.
• the lighting device by a delay time delayed after setting the target temperature is switched off automatically.
• the delay time is advantageously between 0.1 and 10 seconds, preferably between 1.0 and 3.0 seconds. If the lighting device is not immediately adjusted a target temperature, but only after one Delay time is switched off, this has the Advantage that while setting the target temperature, i.e. when turning the temperature selector switch, no shutdown and the cooking compartment is still in use during this time viewing by the user is illuminated. First when the setting process of the target temperature is finished, i.e. the preselected target temperature no longer changes the delay time measurement starts and after expiry the predetermined delay time is the lighting device switched off.
• Another, advantageous in all embodiments Feature may be that the lighting device when operating a control element of the Oven automatically switched on and after completion the actuation is switched off again.
• the lighting device after a predetermined lighting duration after completion of the operation is turned off.
• the lighting duration can advantageously between 1 and 30 seconds, preferably be between 5 and 15 seconds.
• a feature can be that the lighting device at Opening the door of the cooking compartment is switched on automatically will, even if the lighting device before opening the oven door is switched off. Here too ensures that the cooking space is illuminated when the User fiddled with the door without doing any special To have to operate the switch. After closing the The door can, if the Lighting device should be turned off, the lighting device immediately or again with a time delay turned off.
• a steam cooker according to the invention is especially suitable for devices that have a fan a circulating air or hot air device.
• a further advantageous feature that depending on the cooking space temperature, especially if the oven temperature is lower than is a predetermined limit, the heating of the hot air device switched off and the fan of the hot air device clocked or with reduced power is operated. If the fan is not constantly or operated with reduced power, can be switched off Lighting device an even lower Cooking space temperature reached and at low operating temperatures the accuracy and uniformity of temperature control be improved.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Electric Stoves And Ranges (AREA)
• Electric Ovens (AREA)
• Cookers (AREA)

Applications Claiming Priority (2)

Publications (3)

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ID=7898034

Family Applications (1)

Country Status (3)

Cited By (1)

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Citations (2)

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• 1999
  • 1999-02-19 DE DE19906990A patent/DE19906990A1/de not_active Withdrawn
• 2000
  • 2000-02-07 ES ES00102144T patent/ES2226621T3/es not_active Expired - Lifetime
  • 2000-02-07 DE DE50007580T patent/DE50007580D1/de not_active Expired - Lifetime
  • 2000-02-07 EP EP00102144A patent/EP1036990B1/fr not_active Expired - Lifetime

Patent Citations (2)

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