A method for operating a door assembly of an appliance, the door assembly including a display and being configured for providing selective access to a cavity of the appliance, the method including determining that the door has been shut, determining that an item is present within the cavity, determining that a primary application is displayed on the display, and displaying a control interface over a sub-portion of the application on the display when the application is displayed on the display.

A system is configured to perform an operation that results in increasing a thermal energy of a load. The system includes a radio frequency signal source configured to supply a radio frequency signal, an electrode coupled to the radio frequency signal source, and a variable impedance network that includes at least one variable passive component. The variable impedance network is coupled between the radio frequency signal source and the electrode. The system includes a controller configured to determine an operation duration based upon a configuration of the variable impedance network, and to cause the radio frequency signal source to supply the radio frequency signal for the operation duration.

A cooking appliance, as provided herein, may include a cabinet, a magnetron, an induction heating coil, and a one-way field filter. The cabinet may define a cooking chamber. The magnetron may be mounted within the cabinet in communication with the cooking chamber to direct a microwave thereto. The induction heating coil may be mounted within the cabinet to direct a magnetic field thereto. The one-way field filter may be disposed within the cabinet between the induction heating coil and the cooking chamber to restrict passage of the microwave therethrough while permitting the magnetic field. The one-way filter may include a lower layer and an upper layer. The lower layer may include a plurality of parallel conductive bands extending in a first direction. The upper layer may be disposed above the lower layer. The upper layer may include a plurality of parallel conductive bands extending in the second direction.

A method and a device for drying an explosive, wherein the explosive contains moisture and microwave radiation causes the explosive to expel the moisture contained in the explosive. Provided is a drying chamber having magnetrons that exert the required microwave radiation on the explosive to be dried and thereby heat the explosive. During heating, the moisture in the explosive is then expelled.

The present invention is a microwave heating device and has a microwave guide tube, two microwave transmitting modules, and a transmission module. The microwave guide tube forms a wave travelling path and has at least one conveying opening pair and at least one waveguide plate pair. The at least one conveying opening pair has two conveying openings respectively disposed on two opposite walls of the microwave guide tube along a conveying direction. The at least one waveguide plate pair is disposed in the microwave guide tube and has two waveguide plates parallel with the wave travelling path. The two microwave transmitting modules are disposed on two opposite ends of the microwave guide tube. The transmission module extends through the at least one conveying opening pair along the conveying direction.

A cooking appliance, as provided herein, may include a cabinet, a magnetron, an induction heating coil, and a one-way field filter. The cabinet may define a cooking chamber. The magnetron may be mounted within the cabinet in communication with the cooking chamber to direct a microwave thereto. The induction heating coil may be mounted within the cabinet to direct a magnetic field thereto. The one-way field filter may be disposed within the cabinet between the induction heating coil and the cooking chamber to restrict passage of the microwave therethrough while permitting the magnetic field. The one-way filter may include a lower layer and an upper layer. The lower layer may include a plurality of parallel conductive bands extending in a first direction. The upper layer may be disposed above the lower layer. The upper layer may include a plurality of parallel conductive bands extending in the second direction.

Embodiments disclosed herein include a housing for a source assembly. In an embodiment, the housing comprises a conductive body with a first surface and a second surface opposite from the first surface, and a plurality of openings through a thickness of the conductive body between the first surface and the second surface. In an embodiment, the housing further comprises a channel into the first surface of the conductive body, and a cover over the channel. In an embodiment, a first stem over the cover extends away from the first surface, and a second stem over the cover extends away from the first surface. In an embodiment, the first stem and the second stem open into the channel.

A food heating device includes a placement unit and a heating unit. The placement unit includes a housing and a placement board, wherein the placement board is disposed in the housing and is for placing a food item. The heating unit includes a water injection element and a microwave element, wherein the water injection element connects to the housing and is communication with an internal space of the housing, and the microwave element connects to the housing. The microwave element is for heating by microwave the water injected into the internal space of the housing through the water injection element and producing steam therefrom.

The invention relates to a system (100) for preparing at least one food product (1), comprising: a cooking chamber (10), in which at least one preparation area (5) is provided, wherein the at least one food product (1) can be positioned and prepared at the least one preparation area (5), at least one antenna arrangement (30) for supplying energy of electromagnetic energy (80) into the cooking chamber (10), whereby the at least one food product (1) can be heated, one transmission device (40) for operating the antenna arrangement (30), wherein at least one antenna (31) of the antenna arrangement (30) is oriented depending on the preparation area (5) and is operable according to at least one operation mode by the transmission device (40), so that a performance-optimized temperature zone distribution for heating the food product (1) can be generated.

Using a memory that manages a user log including at least a cooking time and a food to be cooked with a cooking device used by each user in a plurality of users, a recommended cooking time corresponding to a first user's food to be cooked included in recommended cooking times for respective foods calculated based on cooking times with the cooking devices is acquired from a server, a user interface that prompts the first user to select one of candidates of cooking times including at least the recommended cooking times is displayed on a display, and in response to detecting that a cooking time is selected by performing an input operation on the user interface, a setting command to set the selected cooking time is output to the first cooking device.