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公开(公告)号：US20230156878A1
公开(公告)日：2023-05-18
申请号：US18098706
申请日：2023-01-19
Applicant: Sichuan University
Inventor： Huacheng Zhu , Fengming Yang , Yang Yang
Abstract: The invention relates to the technical field of microwave heating, and more particularly to a high-efficiency heating device in a microwave chamber and a heating method thereof. A high-efficiency heating device in a microwave chamber, comprising: a heating chamber; a straight-walled waveguide with microwave asymmetric propagation function; wherein one end of the straight-walled waveguide is communicated with the heating chamber; and at least one group of unidirectional waveguide structures, which are attached to an inner sidewall of the straight-walled waveguide; wherein the unidirectional waveguide structures comprise a first medium section and a second medium section which are provided along the microwave transmission direction; wherein a dielectric constant of the first medium section gradually increases along the microwave transmission direction and has a maximum value of εmax, a dielectric constant of the second medium section is a constant value of εc, and εmax=εc.
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公开(公告)号：US20230030516A1
公开(公告)日：2023-02-02
申请号：US17964842
申请日：2022-10-12
Applicant: Sichuan University
Inventor： Yang Yang , Huacheng Zhu
Abstract: A SWIPT (simultaneous wireless information and power transfer) device based on the modulation of power supply ripple of magnetron includes a magnetron power supply, a magnetron, an IF (intermediate frequency) signal generator and a first capacitor. The first and second cathode power lines are provided between two ends of the magnetron power supply and two ends of the cathode of the magnetron respectively. One end of the first capacitor is connected with the IF signal generator, and another end of the first capacitor is connected with the first cathode power line. A SWIPT method includes applying an IF signal which is equivalent to the ripple of anode voltage of the magnetron to the anode voltage of the magnetron; taking a resonance signal excited by the magnetron as a local oscillation signal; generating a new signal at an output end of the magnetron, and radiating the new signal through an antenna.
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公开(公告)号：US20210178007A1
公开(公告)日：2021-06-17
申请号：US17165914
申请日：2021-02-02
Applicant: SICHUAN UNIVERSITY
Inventor： Huacheng Zhu , Yang Yang , Kama Huang
IPC: A61L9/20
Abstract: An air purification device able to kill bacteria and viruses is provided, including an air channel, an air pump, a filtering device, and an electrodeless ultraviolet sterilization device. The electrodeless ultraviolet sterilization device is arranged inside the air channel and includes a microwave generator, an electrodeless ultraviolet tube, and a uniform radiator. The uniform radiator is a coaxial cable with gaps provided thereon. The electrodeless ultraviolet tube is a hollow columnar quartz tube. The coaxial cable is arranged in a hollow portion of the quartz tube. The coaxial cable is connected to the to microwave generator. The air purification device has a compact structure. Through arranging the electrodeless ultraviolet sterilization device inside the air channel, large-granular dust in the air is filtered, and meanwhile, bacteria and viruses in the air are effectively killed. Moreover, the present invention is safe and effective and has high sterilization efficiency and a low production cost.
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公开(公告)号：US20190182910A1
公开(公告)日：2019-06-13
申请号：US16273147
申请日：2019-02-12
Applicant: Sichuan University
Inventor： Kama Huang , Huacheng Zhu , Yang Yang , Xing Chen , Changjun Liu
Abstract: A microwave oven based on phased arrays includes a heating chamber; a microwave feed source, wherein the microwave feed source includes multiple array antennas which are evenly distributed at a top portion of the heating chamber; mass sensors which are adapted for at least dividing a bottom portion of the heating chamber into two parts; a phase control module for connecting the mass sensors and the array antennas, wherein the mass sensors are adapted for transmitting quality signals of an object to be heated to the phase control module. The quality signals of the object of the mass sensors are transmitted back to the phase control module, in which the microwave is radiated more to the food with high quality, that is, the space controllable heating is achieved, so as to improve energy efficiency and heating uniformity.
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Patent Agency Ranking
公开(公告)号：US12207379B2
公开(公告)日：2025-01-21
申请号：US17480354
申请日：2021-09-21
Applicant: Sichuan University
Inventor： Huacheng Zhu , Yang Yang
Abstract: A microwave heating device with reflection protection belongs to a technical field of microwave applications. A first port of a circulator is connected to a microwave generator, and a second port of the circulator is connected to a microwave transmission device. A water load comprises a waveguide section, a metamaterial structure layer and the absorption tube. One end of the waveguide section is connected to a third port of the circulator, and the other end is sealed by a metal plate. The metamaterial structure layer is arranged in the waveguide section, and a center of the metamaterial structure layer has an accommodation space. The absorption tube is arranged along an internal wall of the accommodation space with a spiral extending form. Both ends of the absorption tube penetrate the waveguide section, and coolant flows in the absorption tube. Relative dielectric constants of the metamaterial structure layer gradually increase.
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公开(公告)号：US12009676B2
公开(公告)日：2024-06-11
申请号：US17964842
申请日：2022-10-12
Applicant: Sichuan University
Inventor： Yang Yang , Huacheng Zhu
Abstract: A SWIPT (simultaneous wireless information and power transfer) device based on the modulation of power supply ripple of magnetron includes a magnetron power supply, a magnetron, an IF (intermediate frequency) signal generator and a first capacitor. The first and second cathode power lines are provided between two ends of the magnetron power supply and two ends of the cathode of the magnetron respectively. One end of the first capacitor is connected with the IF signal generator, and another end of the first capacitor is connected with the first cathode power line. A SWIPT method includes applying an IF signal which is equivalent to the ripple of anode voltage of the magnetron to the anode voltage of the magnetron; taking a resonance signal excited by the magnetron as a local oscillation signal; generating a new signal at an output end of the magnetron, and radiating the new signal through an antenna.
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公开(公告)号：US20210328318A1
公开(公告)日：2021-10-21
申请号：US17356525
申请日：2021-06-24
Applicant: Sichuan University
Inventor： Huacheng Zhu , Yang Yang
Abstract: A meta-surface water load includes a waveguide section, a water load section and two meta-surface plates; the water load section is arranged at a rear end of the waveguide section; the two meta-surface plates are arranged opposite on inner walls of two narrow sides of the waveguide section; the water load section includes a metal casing, a ceramic partition, a water inlet and a water outlet; the metal casing is mounted at the rear end of the waveguide section; cooling liquid flows in the metal casing, entering from the water inlet and leaving from the water outlet; the ceramic partition is for separating interior of the waveguide section and interior of the metal casing; a relative permittivity of materials from front to rear of each meta-surface plate is progressively increased, so that microwave in the waveguide section is propagated to the water load section in one direction.
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公开(公告)号：US11054454B2
公开(公告)日：2021-07-06
申请号：US16699614
申请日：2019-11-30
Applicant: Sichuan University
Inventor： Yang Yang , Kama Huang , Huacheng Zhu , Xing Chen , Changjun Liu
IPC: G01R29/08
Abstract: A wireless passive field strength probe includes monopole antennas; a detection module; a micro processing device; a wireless transmission module and an antenna module, wherein the wireless transmission module is connected to the micro processing device and the antenna module; a frequency of the antenna module is different from a frequency of the field to be measured, and is not a harmonic of the frequency of the field to be measured; and a power module connected to the detection module or the antenna module. The wireless passive field strength probe of the present invention transmits the vector electric field, the probe serial numbers and the coordinate signals of the probe in real time through the wireless transmission module, and provides the power supply to the communication module through detecting or receiving microwave signals through the antenna, thereby avoiding inaccurate wireless measurement.
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公开(公告)号：US10470257B2
公开(公告)日：2019-11-05
申请号：US15352604
申请日：2016-11-16
Applicant: Sichuan University
Inventor： Kama Huang , Huacheng Zhu , Yang Yang , Changjun Liu , Xing Chen
Abstract: The present invention relates to a technical field of microwave heating, and more particularly to a microwave frequency-selective heating device and a method thereof. The microwave frequency-selective heating device includes: a heating chamber with a microwave feed-in device, and a frequency controller; wherein the frequency controller is connected to the microwave feed-in device. According to the microwave frequency-selective heating device and the method of the present invention, the heating frequency is adjusted by setting the microwave adjusting device, which improves a material heating uniformity while greatly increases a material microwave absorption rate, so as to solve a heating efficiency problem of the conventional technologies. According to the present invention, the frequency for the heated material is intelligently selected by the micro-processor of the microwave adjusting device, and then fed in after being adjusted by the frequency control circuit, which is effective and convenient.
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