Defrosting apparatus with arc detection and methods of operation thereof

    公开(公告)号:US11800608B2

    公开(公告)日:2023-10-24

    申请号:US16131636

    申请日:2018-09-14

    申请人: NXP USA, Inc.

    摘要: A defrosting system includes an RF signal source, one or more electrodes proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrode(s), and an impedance matching network electrically coupled along the transmission path between the output of the RF signal source and the electrode(s). The system also includes measurement circuitry coupled to the transmission path and configured to measure one or more parameters that include voltage, current, forward signal power, reflected signal power, and S11 along the transmission path. A system controller is configured to monitor the measurements, and to modify operation of the system when a rate of change of any of the monitored parameter(s) exceeds a predetermined threshold. The impedance matching network may be a single-ended network or a double-ended network.

    MICROWAVE PROCESSING DEVICE, AND MICROWAVE PROCESSING METHOD

    公开(公告)号:US20230217559A1

    公开(公告)日:2023-07-06

    申请号:US17798446

    申请日:2021-02-10

    IPC分类号: H05B6/72 H05B6/70

    CPC分类号: H05B6/72 H05B6/707

    摘要: Provided is a microwave processing apparatus that can irradiate an object with microwaves more uniformly. A microwave processing apparatus 1 includes a cavity that has a cylinder-like shape, and includes an internal space for accommodating an object, the cavity being provided with a microwave passage area in a partial region in an axial direction; a microwave generator; a rotary member that is provided on an outer circumferential side of the cavity so as to be rotatable, and includes, on an outer circumferential side of the microwave passage area, a cylinder-like member having a plurality of areas through which microwaves can pass; and a cover member that is provided while covering the entire cylinder-like member in a circumferential direction, and forms, on an outer circumferential side of the cylinder-like member, a wave guidepath for the microwaves introduced from the microwave generator.

    MICROWAVE HEATING APPARATUS
    6.
    发明公开

    公开(公告)号:US20230156877A1

    公开(公告)日:2023-05-18

    申请号:US17528855

    申请日:2021-11-17

    IPC分类号: H05B6/70

    CPC分类号: H05B6/707 H05B6/705

    摘要: A microwave heating apparatus has a magnetron, a circulator, a heating assembly, and an end assembly. The heating assembly has a base waveguide tube and a guiding tube obliquely mounted through the base waveguide tube. An included angle between the guiding tube line and the base waveguide tube is smaller than 90 degrees. The end assembly includes a reflecting component having a reflecting surface facing toward the guiding tube, and an adjusting module for adjusting a distance between the reflecting component and the guiding tube. By adjusting the included angle between the guiding tube and the base waveguide tube, an inclined angle of the reflecting surface of the reflecting component and the distance defined between the reflecting component and the guiding tube, a best impedance matching of the microwave can be set according to impedance change of liquid to be heated and heating efficacy of the microwave heating apparatus can be increased.

    Microwave heating device and method for operating a microwave heating device

    公开(公告)号:US11617240B2

    公开(公告)日:2023-03-28

    申请号:US16443095

    申请日:2019-06-17

    摘要: A microwave heating device includes radiating portions adapted to radiate microwaves to the heating chamber and is operated according to operational configurations that differ in frequency or in phase shift(s) between the radiated microwaves. A learning procedure is executed by sequentially operating the radiating portions in several operational configurations. Energy efficiency data are calculated for those operational configurations. An operating frequency is selected based on energy efficiency data. An operational configuration with a maximum energy efficiency at the selected operating frequency is taken as a reference. A heating procedure is executed by sequentially operating the radiating portions in operational configurations having the selected operating frequency and respective phase shift(s) chosen around the respective phase shift(s) of the reference operational configuration. The phase shift(s) of each chosen operational configuration may have a phase shift distance from the respective phase shift(s) of the reference operational configuration, such that, in the space of the phase shifts, the reference operational configuration is surrounded by the chosen operational configurations.