In an embodiment, an apparatus includes a radio frequency (RF) generator that is to generate a RF signal, first and second electrodes, and an impedance match module in series between the RF generator and the first electrode. The RF generator detects reflected power from the RF signal applied to a load electrically coupled between the first and second electrodes to change a temperature of the load, the RF signal to be applied to the load until the reflected power reaches a particular value.

The present disclosure provides a radio frequency detecting device, a detecting method, and a microwave oven, and the radio frequency detecting device comprises: a signal transmitting device configured to generate and transmit multiple forward frequency detecting signals of different frequencies; a signal receiver configured to receive multiple reverse frequency detecting signals reflected by the load; a first detection device configured to detect each first parameter corresponding to each of the forward frequency detecting signals; a second detection device configured to detect each second parameter of each of the reverse frequency detecting signals; and a microcontroller configured to determine a state parameter of the load based on the multiple frequencies and the first parameter and the second parameter corresponding to each of the frequencies.

An oven appliance may include a cabinet, a heating element, temperature sensor, and controller. The heating element may be within the cabinet to heat a cooking chamber. The temperature sensor may be mounted in thermal communication with the cooking chamber. The controller may be configured to initiate a cooking operation. The cooking operation may include directing the heating element according to a predetermined holiday heating cycle during a first holiday occurrence, collecting a plurality of temperature readings from the temperature sensor during the first holiday occurrence as a first temperature group, determining, following the first holiday occurrence, a temperature deviation from a set reference temperature, the temperature deviation being based on the first temperature group, generating a modified holiday heating cycle based on the determined temperature deviation, and directing the heating element according to the modified holiday heating cycle during a second holiday occurrence following the first holiday occurrence.

A household appliance includes: a magnetron for generating microwaves during operation; a power supply unit; and a controller for specifying to the power supply unit a power level for the operation of the magnetron. The controller temporarily reduces, in a coexistence mode, the power level specified to the power supply unit for the operation of the magnetron in a manner that reduces or prevents disturbance of communication in a wireless network using beacon frames due to the microwaves generated by the magnetron.

Control electronics may control power amplifier electronics associated with application of RF energy generated using solid state electronic components. The power amplifier electronics may be configured to control application of RF energy in an oven according to a cooking recipe at least in part based on a learning procedure that generates a power cycling between high and low powers when the learning procedure is executed. The control electronics may include processing circuitry configured to employ a thermal stress mitigation technique to control thermal stresses on the power amplifier electronics associated with the power cycling.

A microwave treatment device comprises: a heating chamber that accommodates a heating target, a microwave generator that generates a microwave; a feeding unit that supplies the microwave to the heating chamber; a reflected microwave power detector that detects a reflected microwave power returned to the microwave generator; a controller that controls the microwave generator; and a storage unit. The storage unit stores a level of the reflected microwave power detected by the reflected microwave power detector together with a frequency of the microwave supplied to the heating chamber and an elapsed time after a start of heating the heating target. The controller causes the microwave generator to execute a frequency sweep over a specified frequency band and determines that the heating target is in a boiling state based on a temporal change in a value that is obtained based on the reflected microwave power at each frequency.

A carbon fiber recycling method utilizes a carbon fiber recycling device for recycling carbon fiber from a carbon fiber polymer composite by using a microwave. The carbon fiber recycling device has a cavity and at least one microwave supplying unit. The carbon fiber recycling method adjusts the microwave supplying unit to change the angle between the long axis direction of the cavity and the electric field direction, and to make the long axis direction of the carbon fiber parallel to the electric field direction. By radiating the microwave on the carbon fiber polymer composite, energy of the microwave is quickly absorbed by the carbon fiber to quickly increase a temperature of the carbon fiber, and the carbon fiber polymer composite is effectively and quickly decomposed to remove most polymer matrix of the carbon fiber polymer composite, so as to achieve the objective of recycling the carbon fiber indeed.

A heating cooking apparatus (1) includes a heating cooking chamber (10), a housing (14), a microwave supply unit (53), and a pull-out body unit (13). The heating cooking chamber (10) includes an accommodation space (1A), an opening (11A), and a first surface (11D). The opening (11A) communicates with the accommodation space (1A). The first surface (11D) is disposed on an outer circumference of the opening (11A). The housing (14) accommodates the heating cooking chamber (10). The microwave supply unit (53) supplies microwaves to an interior of the heating cooking chamber (10). The pull-out body unit (13) includes a pull-out body (130) and an angle adjustment member (40). The pull-out body (130) includes a second surface (131 A) facing the first surface (11D). The angle adjustment member (40) can be used to adjust an angle of the second surface (131A) relative to the first surface (11D). The housing (14) includes a through hole (14A1). The through hole (14A1) faces the angle adjustment member (30).

A cooking apparatus includes a cooking chamber, a first heating source disposed on an upper side of the cooking chamber, a second heating source disposed on a lower side of the cooking chamber, and a shelf. The first heating source includes including a plurality of heaters and the second heating source includes a magnetron configured to generate high-frequency waves. The cooking chamber includes a first cooking area formed above the shelf and a second cooking area formed below the shelf. The first cooking area supporting a first object to be cooked using the first heating source and the second heating source. The second cooking area supporting a second object to be cooked using the second heating source. The shelf includes a cooking surface and a heat generator. The heat generator is configured to generate heat due to the high-frequency waves and transfer the heat to the cooking surface.

A cooking appliance includes a cooking chamber, a shelf disposed in the cooking chamber and comprising a plurality of cooking areas, a plurality of heaters mounted at one portion of the cooking chamber, spaced apart from one another to correspond to the plurality of cooking areas, respectively, and independently controlled to generate heat, and a heat-reflecting plate comprising a plurality of reflectors respectively accommodating the corresponding plurality of heaters therein, and to reflect the heat generated by the plurality of heaters to the corresponding plurality of cooking areas to generate a temperature difference among the plurality of cooking areas.