A microwave heating apparatus includes a plurality of antennas that are two-dimensionally arranged in a heating chamber of the microwave heating apparatus, wherein a longitudinal orientation of an emission electrode included in one of the plurality of antennas is different from a longitudinal orientation of an emission electrode included in adjacent one of the plurality of antennas.

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.

A drawer-type microwave oven (200), and a door opening and closing control method for the drawer-type microwave oven (200). The drawer-type microwave oven (200) comprises: a cavity assembly; a drawer assembly, provided in the cavity assembly and used for containing food to be processed; a push rod assembly (2062), provided at the bottom of the cavity assembly and capable of pushing the drawer assembly out of or into the cavity assembly; a control panel (220), disposed on the cavity assembly, and provided with an on/off button for controlling the drawer assembly to be opened or closed; and a microprocessor (202), connected to the push rod assembly (2062) and/or the control panel (220) and used for controlling the operating state of the push rod assembly (2062) according to an instruction of the control panel (220). Automatic door opening and closing of the drawer-type microwave oven (200) can be controlled with one button. Moreover, when the drawer (2044) is moving, the button can be pressed for emergency braking. Thus, a plurality of operations can be implemented using only one button. The present invention is easy to operate and safe to use.

Microwave-based drilling systems and methods are provided that employ coiled tubing that is deployed from a spool of coiled tubing to guide propagation of microwave radiation into a borehole. The coiled tubing has a surface end disposed at the spool. Microwave radiation generated at the surface is injected into the surface end of the coiled tubing. The microwave radiation propagates inside the coiled tubing and is used to vaporize rock and extend the borehole.

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.

To reduce a limitation in a heat method caused by an interference of an electromagnetic wave in an electromagnetic wave beating system that uses an electromagnetic wave generator by a semiconductor element. The electromagnetic wave heating system comprises a heat chamber having a first wall surface and a second wall surface different from the first wall surface, in which an object is placed to be heated, a first flat antenna arranged on the first wall surface of the heat chamber and configured to emit an electromagnetic wave so as to heat the object inside the heat chamber, a second flat antenna arranged on the second wall surface and configured to emit an electromagnetic wave so as to heat the object inside the heat chamber, an electromagnetic wave generator comprising a semiconductor element and configured to output the electromagnetic wave, a switcher configured to supply the electromagnetic wave outputted from the electromagnetic wave generator to any one of the first flat antenna or the second flat antenna so as to switch the first and second flat antennas to emit the electromagnetic wave, and a controller configured to control the electromagnetic wave generator and the switcher.

To heat an object locally by automatically recognizing a shape of the object and emitting an electromagnetic wave based on the shape without enlarging a device size. An electromagnetic wave heating system comprises a heat chamber having a wall surface, in which an object is placed to be heated, a flat antenna arranged on the wall surface of the heat chamber and configured to emit the electromagnetic wave so as to heat the object inside the heat chamber, and a controller configured to control a movement of the flat antenna. The flat antenna comprises a plurality of antennas arranged in an array manner, and the controller detects a shape or a temperature distribution of the object based on a reflected power that is generated when the electromagnetic wave is emitted from the plurality of antennas, and determines a size of microwave supplied into each of the plurality of antennas based on a detection result thereof.

The present disclosure provides a microwave oven circuit, a control method and a control device of the microwave oven circuit, and a microwave oven. The microwave oven circuit includes a magnetron and an inverter circuit for driving the magnetron to work. The control method includes when the inverter circuit needs to be started, detecting a zero crossing point of an electric supply signal for supplying power to the microwave oven circuit, when the electric supply signal is detected to reach the zero crossing point, controlling the inverter circuit to be powered on; when the power-on time length of the inverter circuit reaches a first predetermined time length.

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.

A carburized La.sub.2O.sub.3 and Lu.sub.2O.sub.3 co-doped Mo filament cathode and its fabrication method, which belongs to the technical field of rare earth-refractory metal cathodes. The rare earth oxides are La.sub.2O.sub.3 and Lu.sub.2O.sub.3, and the total concentration of rare earth oxides ranges from 2.0-5.0 wt. %. The La.sub.2O.sub.3 and Lu.sub.2O.sub.3 co-doped molybdenum oxide powers are prepared by Sol-Gel method. La.sub.2O.sub.3 and Lu.sub.2O.sub.3 co-doped Mo powers are prepared by two calcining steps. Then pressing and sintering the mixed powders to obtain the molybdenum rods; operating mechanical and heat processes of the molybdenum rods to obtain molybdenum filament. Operating electrolytic cleaning, straightening, winding modeling and cutting treatments with Mo filament to obtain the un-carburized La.sub.2O.sub.3 and Lu.sub.2O.sub.3 co-doped Mo cathode. And then carburize the filament cathode at a high temperature for a short time to obtain a cathode with high carburization degree. And then operate the out-gassing treatment and activation treatment with the cathode at a high temperature to obtain an environmental and non-radioactive cathode with good emission current and emission stability.