A dielectric heating device includes a first electrode and a second electrode that face an object to be heated and to which an AC voltage is applied, and a coil that is electrically coupled in series to the first electrode. A linear distance between one end and the other end of the coil is equal to or smaller than a linear distance between the one end and a central portion of the coil in a magnetic path direction of the coil.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

Disclosed is a refrigerating and freezing device, including a cabinet defining at least one storage compartment, at least one cabinet door configured to respectively open and close the at least one storage compartment, a refrigerating system configured to provide cooling capacity to the at least one storage compartment, and a heating unit. The heating unit includes a cylinder body disposed in one storage compartment and provided with a pick-and-place opening, a door body configured to open and close the pick-and-place opening, and an electromagnetic generating system configured to generate electromagnetic waves in the cylinder body to heat an object to be processed. The refrigerating and freezing device further includes a cabinet door detection device, and the cabinet door detection device is configured to detect open and closed states of the cabinet door corresponding to the storage compartment provided with the cylinder body; and the electromagnetic generating system stops generating electromagnetic waves when a corresponding cabinet door is in an open state, which can prevent electromagnetic waves in the heating unit from leaking and affecting the health of a user, thereby improving the safety of the refrigerating and freezing device.

Disclosed is a refrigerating and freezing device, including a cabinet defining at least one storage compartment, at least one cabinet door configured to respectively open and close the at least one storage compartment, a refrigerating system configured to provide cooling capacity to the at least one storage compartment, and a heating unit. The heating unit includes a cylinder body disposed in one storage compartment and provided with a pick-and-place opening, a door body configured to open and close the pick-and-place opening, and an electromagnetic generating system configured to generate electromagnetic waves in the cylinder body to heat an object to be processed. The refrigerating and freezing device further includes a cabinet door detection device, and the cabinet door detection device is configured to detect open and closed states of the cabinet door corresponding to the storage compartment provided with the cylinder body; and the electromagnetic generating system stops generating electromagnetic waves when a corresponding cabinet door is in an open state, which can prevent electromagnetic waves in the heating unit from leaking and affecting the health of a user, thereby improving the safety of the refrigerating and freezing device.

Disclosed are an electromagnetic wave generating system and a heating device. The electromagnetic wave generating system includes an electromagnetic generating module, a radiating assembly and a matching unit connected in series between the electromagnetic generating module and the radiating assembly. The electromagnetic generating module is configured to generate an electromagnetic wave signal. The radiating assembly includes one or more radiating units and is configured to be electrically connected with the electromagnetic generating module to generate electromagnetic waves of a corresponding frequency according to the electromagnetic wave signal. The matching unit includes a first matching module. The first matching module includes a plurality of fixed value inductors connected in series between the electromagnetic generating module and the radiating assembly, and a plurality of parallel branches, wherein each parallel branch of the first matching module includes a fixed value capacitor and a switch connected in series. The input ends of the plurality of parallel branches of the first matching module are respectively connected in series between two adjacent inductors and between an end inductor and the radiating assembly, and the output ends thereof are all configured to be grounded, so as to match a load more accurately after receiving an adjusting command