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2 results about "Microwave cavity" patented technology

A microwave cavity or radio frequency (RF) cavity is a special type of resonator, consisting of a closed (or largely closed) metal structure that confines electromagnetic fields in the microwave region of the spectrum. The structure is either hollow or filled with dielectric material. The microwaves bounce back and forth between the walls of the cavity. At the cavity's resonant frequencies they reinforce to form standing waves in the cavity. Therefore, the cavity functions similarly to an organ pipe or sound box in a musical instrument, oscillating preferentially at a series of frequencies, its resonant frequencies. Thus it can act as a bandpass filter, allowing microwaves of a particular frequency to pass while blocking microwaves at nearby frequencies.

Environmental-protection device microwave source intelligent remote control system

ActiveCN103978531ACentralized controlRealize centralized controlWood treatment detailsTotal factory controlAutomatic controlAir pump
An environmental-protection device microwave source intelligent remote control system comprises a microwave cavity, multiple sets of magnetron units, microwave source control cabinets, an infrared temperature measurement probe, a cavity temperature and humidity instrument, a blowing-sucking air pump and a humidifying device; the multiple sets of magnetron units are arranged on the microwave cavity, and each magnetron unit comprises a magnetron; the interior of the microwave source control cabinet is provided with a plurality of magnetron power sources corresponding to the magnetron units, and each magnetron power source is connected with one magnetron by a power line; the infrared temperature probe and the cavity temperature and humidity instrument are respectively used for detecting the material temperature and the cavity internal temperature and humidity; the blowing-sucking air pump and the humidifying device are electrically connected with a main control unit; the main control unit comprises a switch module, a display module and a control module; the switch module comprises microwave source switches for controlling the make-and-break of the magnetron power sources; the display module is used for displaying detected data; the control module is used for setting startup and shutdown time or setting the temperature through an internal PLC module, and when the set time or temperature is reached, the switches are automatically controlled to be turned on or off. The environmental-protection device microwave source intelligent remote control system can achieve centralized control of a large number of magnetron units, and greatly improves the efficiency and security of operation.
Owner:ZHONGSHAN NCA HOUSEHOLD EQUIP

Microwave heating temperature field control method based on time-varying electromagnetic field

ActiveCN108366446AImprove temperature uniformityMicrowave heatingMicrowave cavityResonance
The invention relates to a microwave heating temperature field control method based on time-varying electromagnetic field. The microwave heating temperature field control method is characterized by the following features: for industrial microwave heating systems with multiple microwave sources, the power of each microwave source is controlled in real time and randomly so that each microwave sourceoperates at different power at any time, a large number of constantly changing electromagnetic field resonance modes are formed in the microwave cavity, and the temperature uniformity of the surfaceof the heated part is improved by using a random compensation effect between a large amount of electromagnetic field resonance modes in a period of time. The microwave heating temperature field control method obviously improves the temperature uniformity of the heated part in the microwave heating process.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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