A cooking appliance apparatus, in particular an oven apparatus, includes a muffle which defines a cooking chamber, and a heating element to heat the cooking chamber at least partially. A switching unit connects the heating element to a first supply voltage in a first operating state and to a second supply voltage in a second operating state, with the second supply voltage being different from the first supply voltage.

A system includes a cavity configured to receive a container. The container is configured to contain a plurality of grains. The system includes a radio frequency (RF) signal source configured to supply an RF signal, an impedance matching network electrically coupled to an output of the RF signal source, a transmission path coupled to the impedance matching network, and a first electrode in the cavity. The first electrode is coupled to the transmission path and configured to radiate electromagnetic energy into the cavity as a result of receiving the RF signal. The system includes power detection circuitry configured to measure a magnitude of a reflected signal along the transmission path and a controller configured to modify an impedance transformation performed by the impedance matching network based on the magnitude of the reflected signal.

A system includes a cavity configured to receive a container. The container is configured to contain a plurality of grains. The system includes a radio frequency (RF) signal source configured to supply an RF signal, an impedance matching network electrically coupled to an output of the RF signal source, a transmission path coupled to the impedance matching network, and a first electrode in the cavity. The first electrode is coupled to the transmission path and configured to radiate electromagnetic energy into the cavity as a result of receiving the RF signal. The system includes power detection circuitry configured to measure a magnitude of a reflected signal along the transmission path and a controller configured to modify an impedance transformation performed by the impedance matching network based on the magnitude of the reflected signal.

A cooking appliance apparatus, in particular an oven apparatus, includes a muffle which defines a cooking chamber, and a heating element to heat the cooking chamber at least partially. A switching unit connects the heating element to a first supply voltage in a first operating state and to a second supply voltage in a second operating state, with the second supply voltage being different from the first supply voltage.

A cooking appliance apparatus, in particular an oven apparatus, includes a muffle which defines a cooking chamber, and a heating element to heat the cooking chamber at least partially. A switching unit connects the heating element to a first supply voltage in a first operating state and to a second supply voltage in a second operating state, with the second supply voltage being different from the first supply voltage.

A cooking appliance, in particular an induction oven appliance, includes a cavity having a wall, at least one induction heating element, and at least one electrically conductive screening element for screening an electric and/or magnetic field generated by the induction heating element. The induction heating element can be arranged on the wall of the cavity.

A cooking appliance, in particular an induction oven appliance, includes a cavity having a wall, at least one induction heating element, and at least one electrically conductive screening element for screening an electric and/or magnetic field generated by the induction heating element. The induction heating element can be arranged on the wall of the cavity.

A multi-heat energy source core sample holder assembly for conducting experiment on a core sample includes a core sample holder, a flexible sleeve, and a multi-heat energy generation source arrangement. The core sample holder includes a cylindrical pressure chamber and a pair of disk-shaped flanges positioned along opposite ends of the cylindrical pressure chamber to accommodate at least one fluid injection port and at least one fluid discharge port. The flexible sleeve is arranged within and along the cylindrical pressure chamber to define one or more section(s) to hold the core sample. The energy generation source includes a wire member to be coiled along an internal wall of the flexible sleeve to be supplied with electric current in at least one of a Direct Current (DC) form to produce an electric resistance heating, or an Alternate Current (AC) form to produce an electromagnetic heating, singularly or in combination.

A multi-heat energy source core sample holder assembly for conducting experiment on a core sample includes a core sample holder, a flexible sleeve, and a multi-heat energy generation source arrangement. The core sample holder includes a cylindrical pressure chamber and a pair of disk-shaped flanges positioned along opposite ends of the cylindrical pressure chamber to accommodate at least one fluid injection port and at least one fluid discharge port. The flexible sleeve is arranged within and along the cylindrical pressure chamber to define one or more section(s) to hold the core sample. The energy generation source includes a wire member to be coiled along an internal wall of the flexible sleeve to be supplied with electric current in at least one of a Direct Current (DC) form to produce an electric resistance heating, or an Alternate Current (AC) form to produce an electromagnetic heating, singularly or in combination.

In certain embodiments, inductive heating is added to a metal working process, such as a welding process, by an induction heating head. The induction heating head may be adapted specifically for this purpose, and may include one or more coils to direct and place the inductive energy, protective structures, and so forth. Productivity of a welding process may be improved by the application of heat from the induction heating head. The heating is in addition to heat from a welding arc, and may facilitate application of welding wire electrode materials into narrow grooves and gaps, as well as make the processes more amenable to the use of certain compositions of welding wire, shielding gasses, flux materials, and so forth. In addition, distortion and stresses are reduced by the application of the induction heating energy in addition to the welding arc source.