225 results about "Microwave shielding" patented technology

The invention relates to microwave photocatalytic degradation reaction equipment and belongs to the technical field of waste water treatment. The equipment provided by the invention aims at solving the problems that a membrane separation component is destroyed owning to thermal abrasion and the outer side of an electrodeless ultra violet lamp screen is scaled as the electrodeless ultraviolet lamp screen adopts a quartz tube in the prior art of microwave photocatalytic degradation on industrial waste water containing organic pollutant in a package manner. According to the invention, an organic matter membrane separation assembly is contained in a metal cage-shaped microwave shielding case, influence of microwave is isolated, and the absorption of metal particles and carbon particles, which are inevitably attached on the surface of the membrane separation assembly, to microwave energy is inhibited, so that thermal abrasion destruction on the membrane separation assembly is avoided; meanwhile, the cage-shaped microwave shielding case disclosed by the invention does not influence the function and operation of the membrane separation assembly; and an ultrasonic transducer is attached to the outer side of the wall face of a reactor, and the scale is immediately eliminated by high frequency ultrasonic wave through sound wave propagation by virtue of the wall of the reactor and a liquid mixture inside the wall.

An isolation apparatus for reducing radiated emissions of a microwave energy delivery system including an isolation circuit board and a shield coupling, the isolation circuit board and shield coupling configured to capacitively couple a microwave generator and a coaxial transmission cable and the isolation circuit board further configured to pass energy at a fundamental frequency between the microwave generator and the coaxial transmission cable.

An electromagnetic pulse (EMP) and high power microwave (HPM) shielding enclosure made of bulk-solidifying amorphous alloys and composites with high hardness, corrosion resistance, high strength-to-weight ratio and high conductivity, and a method of making such shielding enclosures is provided.

The invention provides a microwave heating device. The microwave heating device comprises a microwave generator, a microwave cavity and a microwave local shielding part; the microwave generator sends microwaves into the microwave cavity; the microwave cavity is used for placing a wave sucking material; the microwave local shielding part is positioned in the microwave cavity, and is used for covering the outer surface of the wave sucking material; the microwave local shielding part consists of a microwave shielding area and a microwave passing area; and the microwave passing area includes one or more gaps, so that the microwaves in the microwave cavity can enter the wave sucking material from the gaps to be absorbed. The microwave heating device, provided by the invention,can perform fixed-point and / or fixed-direction heating for the wave sucking material.

A microwavable package may include one or more microwave-absorbing regions, microwave-shielding regions, and / or embossed regions designed to enhance microwave cooking of food products. Microwave-absorbing regions (i.e., solid susceptors) may promote thermal cooking, browning, and / or crisping of food products. Microwave-shielding regions (i.e., patterned susceptors) may promote uniform cooking and inhibit overcooking of food products. A patterned susceptor may be a conductive grid or a grid of conductive or non-conductive shapes. In an embodiment, solid susceptors and patterned susceptors. may be formed from a common thin metal film on a common polymer barrier layer and laminated to a common structural backing layer. An embossed region of a microwavable package may promote crisping of a food product by allowing air to circulate between the food product and an interior surface of the microwavable package.

A method to control microwave heating of containers of foodstuff products to optimize heating of the foodstuff product, and reduce microwave activity is provided. Heating is optimized by selectively placing microwave shielding material around portions of side walls of the product container.

The invention relates to a microwave photocatalytic device for degrading wastewater and being capable of keeping high treatment efficient continuously, and belongs to the technical field of wastewater treatment. In the conventional microwave photocatalytic degrading technology for the industrial wastewater containing organic contaminants, the outer lateral surface of a quartz tube for shielding a non-polar ultraviolet lamp in a device is soaked in wastewater liquid for a long time so as to generate a scale phenomenon, the permeability of the quartz tube about the ultraviolet light is seriously influenced due to the existence of the scale layer, and the treatment efficient of a microwave photocatalytic reaction device is greatly reduced. The microwave photocatalytic device aims at solving the problem. According to the invention, an ultrasonic transducer provided with a cage-shaped microwave shielding cover is arranged on the inner lateral surface of the sidewall of a microwave photocatalytic reactor, on the premise of not stopping and not disassembling, the scale on the outer lateral surface of the quartz tube is instantly ultrasonically cleared through ultrasonic conveyance of a liquid medium, therefore the high permeability of the quartz tube about the ultraviolet light is kept, and the continuous high efficiency of the microwave photocatalytic degrading reaction device is maintained.

The invention belongs to a microwave and steam cooking two-purpose microwave oven, which comprises a barrel-type furnace body with an opened upper part and a sealed bottom, and a cylindrical working cavity arranged in the barrel-type furnace body, a spherical oven door provided with a microwave shielding layer, a microwave generation and control box, a steam heating steamer and a microwave and steam mixed heating steamer, wherein the microwave generation and control box comprises a microwave generator, a transformer, a cooling fan, a capacitor, a control circuit and a control panel. The oven body and the microwave working cavity are respectively changed into the barrel-type furnace body with the opened upper part and the sealed bottom and the cylindrical working cavity, and the lower partof the working cavity can be used for filling steam water and can also used for placing foods for cooking by directly utilizing microwaves, therefore, the microwave and steam cooking two-purpose microwave oven has the characteristics that the structure is simple and reliable, foods can be cooked by directly microwaves or steam or microwaves and steam, thus the advantage of microwave heating is fully developed, the use range of the microwave oven is effectively enlarged, and the utilization rate and the energy-saving effect of the microwave oven are improved.

A microwave oven comprises an oven seat, a microwave generating unit and a cooking cavity. The cooking cavity is composed of a cavity enclosed by a supporting mechanism arranged on the oven seat and a microwave shielding cover; the microwave shielding cover can be opened or locked relative to the oven seat and / or the supporting mechanism; the supporting mechanism comprises an oven cover on the oven seat; the oven cover is tabulate, discal or kettle-shaped and the surface of the oven cover is equipped with microwave through holes corresponding to a microwave emitting area. The microwave oven cooking cavity of the invention directly consists of the supporting mechanism for holding food and the microwave shielding cover; the oven seat equipped with the microwave generating unit is positioned below the cooking cavity; the microwave from the microwave generating unit is emitted to the cooking cavity from bottom to top to heat the materials in the cooking cavity, thus breaking through the design of the traditional microwave ovens. In addition, the heated materials are put on a supporting plate of the supporting mechanism from the upward side, thereby facilitating the operation and cleaning. The microwave oven features simple and reasonable structure, easy manufacturing and processing, high heating efficiency and small floor area.

The present invention provides a wireless AP performance automatic test system, which includes a test host equipped with a test server, a test terminal equipped with a standard wireless network card, and a microwave shielding dark room, and the AP to be tested and the antenna of the standard wireless network card are respectively set In the microwave shielding chamber, a standard wired network card is also provided in the test host, and the standard wired network card is connected to the tested AP through a network cable, and the antenna and the standard wireless network card are connected through a cable. connection; in the microwave shielding anechoic room, the tested AP is set on a controllable 360-degree turntable. By rotating the turntable, the indicators of STAs at different angles can be simulated.

The microwave unit door includes a metallic door frame (1) with an interior glass pane (3) and outer glass pane (2) held spaced apart in it. To improve the observability of the interior of the microwave unit without loosing the microwave shielding effect, e.g. previously provided by a metal screen between the glass panes, and to prevent condensate formation, the interior glass pane (3) closest to the processing space (I) has at least one optically transparent electrically conductive first layer (13) with a microwave absorption capability such that it heats up to prevent condensate formation during operation. The outer glass pane (2) has at least one optically transparent electrically conductive second layer (12) reflecting microwaves passing through the first layer.

A method for providing a microwave-shield on the cover member of a microwavable food tray having different foods therein requiring different degrees of microwave irradiation is provided. The method includes providing an adhesive label directly to a cover member of the food tray in register with one of the food products in the tray. The cover member is provided on the food tray from a sheet of cover material having a plurality of microwave shields pre-applied thereto at discrete intervals.

The invention discloses an organic waste gas treatment device and method. The organic waste gas treatment device comprises a dust remover, a condensing tube nest, activated carbon adsorption and microwave ultraviolet catalytic oxidation equipment, an air heater, a humidifier, a heat recovery device, a cooling drying blower, a regenerative blower and an exhaust fan, wherein the activated carbon adsorption and microwave ultraviolet catalytic oxidation equipment comprises a box body, an activated carbon cylinder, ultra-violet lamps, a microwave generator, a transmission device and a microwave shielding device; the four sides of the box body are made of stainless steel and are sealed to form a sealed body; the activated carbon cylinder is mounted at the central position inside the box body; the outer surface of the activated carbon cylinder is coated with stainless steel; the microwave generator is mounted at the axle center position of the activated carbon cylinder; the ultra-violet lamps are embedded and distributed inside the activated carbon cylinder; partitions are arranged in the activated carbon cylinder to divide the activated carbon cylinder into a purification zone, a regeneration zone and a cooling drying zone equally. The device is novel in structure and reasonable in design, and adopts an innovative design that for industrial waste gas, the functions of activated carbon adsorption and organic gas degradation are realized in the same equipment.

The invention relates to the technical field of microwave tests and in particular relates to a scanning device for near-field test of antennas. The scanning device for near-field test of antennas comprises a microwave shielding darkroom with a wave-absorbing material on the wall and further comprises a computer, a vector network analyzer, a three-dimensional moving system and a near-field test probe, wherein the computer is connected to the vector network analyzer; the input end of the vector network analyzer is connected to the near-field test probe; the near-field test probe is fixed at the front end of a multi-joint robotic arm of the three-dimensional moving system. The three-dimensional moving system comprises a PLC (Programmable Logic Controller), a servo driver, a multi-joint robotic arm and a servo motor. The repeated positioning precise of the probe can reach + / -0.01mm; the positioning planeness can reach + / -0.03mm; connection communication is realized between the PLC controller and the computer by virtue of an Ethernet communication network; the three-dimensional moving system performs real-time precise control by virtue of the computer. The scanning device for near-field test of antennas is high in degree of automation, high in precision, integral in parts and high in integration level and is convenient to use and maintain.

The invention discloses a continuous vacuum freeze-drying system using microwave energy as a heat source, belonging to the technical field of freeze-drying. The system comprises a microwave vacuum freeze-drying device, a vacuum water catching device, a vacuum feed device and a vacuum discharge device, wherein the microwave vacuum freeze-drying device is internally provided with a combined type freeze-drying cabin consisting of a normal-pressure microwave cavity and a vacuum microwave cavity, and the normal-pressure microwave cavity and the vacuum microwave cavity are partitioned by a microwave-transmitted vacuum partition board; the vacuum microwave cavity is connected with a steam channel of the vacuum water catching device; and the vacuum microwave cavity and the steam channel are partitioned by a porous ventilate microwave shielding board. The invention solves the problem of microwave disruptive discharge within a vacuum pressure range required by freeze-drying, has the advantages of good sealing property, high utilization ratio and high freeze-drying speed and can be used for effectively realizing the application of automatic industrialization.

The invention provides a microwave automatic heating device. The microwave automatic heating device comprises a microwave generator, a microwave cavity, a control system, a microwave power control module and a microwave local shielding part, wherein the microwave generator transmits microwaves into the microwave cavity; the microwave cavity is used for holding a light-absorbing material; the microwave local shielding part is positioned in the microwave cavity, and is used for covering the outer surface of the light-absorbing material; the microwave local shielding part consists of a microwave shielding area and a microwave penetration area; the microwave penetration area comprises one or more apertures in order that the microwaves in the microwave cavity can enter the light-absorbing material from the aperture(s) in order to be absorbed; the control system arranged outside the microwave cavity is used for automatically adjusting the turn-on / off and / or power of the microwave generator by automatically controlling the microwave power control module. By adopting the microwave automatic heating device provided by the invention in conjunction with a computer automatic control technology, fixed-point and / or directional heating under automatic control can be performed on the light-absorbing material.

The invention provides a semiconductor microwave electric cooker which comprises an electric cooker liner used for containing food, an upper cover microwave shielding case, a base microwave shielding case, a semiconductor microwave generator and a waveguide box, wherein the upper cover microwave shielding case has an exhaust hole communicated with the liner; the base microwave shielding case has a waveguide hole; the waveguide box is fixed on the base microwave shielding case and corresponds to the waveguide hole; an aerial head of the semiconductor microwave generator is arranged in the waveguide box; and the electric cooker liner is arranged in a microwave shielding cavity formed by the upper cover microwave shielding case and the base microwave shielding case. The semiconductor microwave electric cooker is simple and compact in structure, high in power of semiconductor microwave heating, rapid in heating, even in heating, good in cooking effect and good in safety performance.

The invention provides a simple and practical indoor polarization scattering measurement system, which is used for obtaining high-polarization-purity scattering data based on a vector network analyzer. The indoor polarization scattering measurement system is formed by the vector network analyzer, antennas, a main control computer, a microwave shielding darkroom and a turntable control cabinet. By filling a part of absorbing materials between the antennas, influence of mutual coupling between the antennas is reduced physically;and after converting broadband step frequency domain data to a time domain, near-end antenna mutual coupling signals are removed by utilizing selectivity of a time domain wave door. High-purity target polarization scattering characteristic data is obtained through a method of setting appropriate parameters and the like for the step frequency signals, and polarization data purity is higher than 45 dB; and the polarization scattering measurement system is simplified, and a lot of production cost is reduced.

The invention discloses a rock microwave fracturing testing device based on true triaxial loading. The rock microwave fracturing testing device based on true triaxial loading comprises a true triaxialloading assembly and two microwave radiation fracturing assemblies, and the two microwave radiation fracturing assemblies are the microwave radiation surface fracturing assembly and the microwave radiation in-hole fracturing assembly respectively; the true triaxial loading assembly comprises a fixed loading frame, a movable loading frame, a base, a rail, a sliding table and a two-degree-of-freedom movable frame; two groups of Z-direction actuators and two groups of Y-direction actuators are arranged on the fixed loading frame, and an X-direction actuator is arranged on the movable loading frame; a rock sample loading cavity is located in the middle of the fixed loading frame; both the movable loading frame and the sliding table are arranged on the rail through sliding blocks; both the microwave radiation surface fracturing assembly and the microwave radiation in-hole fracturing assembly are installed on the sliding table through the two-degree-of-freedom movable frame, and the slidingtable and the two-degree-of-freedom movable frame are driven by servo motors; a microwave shielding net is arranged on the movable loading frame, and the testing device is wholly arranged in an electromagnetic shielding chamber.

The invention discloses a split type microwave oven. The split type microwave oven comprises a first microwave shielding member, a microwave module, a coaxial cable, a cavity module, a microwave shielding and choking member and a detecting device, wherein the microwave module comprises a control assembly, a power source and a power supply, and the control assembly and the power supply are respectively connected with the power source; the coaxial cable is telescopically arranged on the microwave module; the cavity module comprises an electromagnetic wave guiding member and a second microwave shielding member, and the second microwave shielding member and the first microwave shielding member are matched with each other so as to define a microwave heating resonant cavity; the detecting device is connected with the control assembly. According to the split type microwave oven disclosed by the invention, when the second microwave shielding member and the first microwave shielding member are matched with each other, the microwave heating resonant cavity which is used for heating food can be defined, and kitchenware, such as bowls and dishes, can be placed on a first fixing member when the cavity module is accommodated to a location close to a second fixing member by the coaxial cable, so that the space occupied by the split type microwave oven is reduced, and the utilization ratio of a kitchen space is increased.

A door assembly for a microwave or electric oven is disclosed, which has an improved structure in which an optimum microwave-shielding frequency is not changed even though an incident angle of microwave is changed, to obtain a user's convenience on cleaning a door. The door assembly for a microwave oven includes a door frame to open and close a cooking cavity; and a door filter having a filter plate adhered to one side of the door frame, a choke portion bent to an opposite side of the cooking cavity in an edge of the filter plate, a first slot formed in a width direction of the choke portion, and a second slot formed in a length direction of the choke portion.

The invention discloses a multifunctional ultrasonic microwave collaborative chemical reactor and a method for preparing a nano semiconductor chalcogenide by using the same. The multifunctional ultrasonic microwave collaborative chemical reactor comprises an ultrasonic generator, a microwave generator, a temperature / time / power display control device, a reaction vessel, a condensing device, a microwave resonator, a microwave shielding device, an air exhausting and air feeding device, and a reaction vessel supporting and lifting device. The chemical reactor has the advantages of uniform vibration, consistent action stressed by all the points in a sample medium, many varieties of selectable extraction solvents, wide range of targets, reduction of the binding force of the targets and sample substrates; accelerated process of the targets from solid phase to solvent phase, large processed sample amount and the like. The chemical reactor can overcome the phenomenon of overheat charring, and can obtain more uniform and better-quality products than single microwave reaction. The chemical reactor has wide application prospect in the fields of chemistry and chemical industry, pharmacy, materials, energy sources, food processing and the like.

A bidirectional wave absorption strong electromagnetic shielding optical window of a multilayer graphene mesh / metal mesh laminated structure belongs to the optical transparent member electromagnetic shielding technology field. The electromagnetic shielding optical window utilizes the different light transmission and microwave shielding characteristics performed by the graphene mesh films when the graphene mesh films have different mesh unit hole area ratios to organically combine the low-reflection and partial absorption microwave characteristics of the graphene mesh films with the strong electromagnetic reflection characteristics of the high-light transmission dual-layer metal meshes, and the multilayer graphene mesh films are placed at the two sides of the dual-layer metal meshes to form a multilayer structure. The dual-layer metal meshes separated by the graphene mesh films are used as the transparent reflection layers, and the graphene mesh films separated by the transparent mediums are used as the transparent absorption layers. By the structure, the radio frequency radiation at the two sides of the optical window can penetrate the absorption layers simultaneously and repeatedly to be absorbed strongly, so that the bidirectional strong shielding and low-reflection characteristics are realized, the visible light has a high light transmission rate by transmitting the laminated structure once. The electromagnetic shielding optical window solves the problem that a conventional transparent electromagnetic shielding method can not consider the bidirectional low-electromagnetic reflection, the strong electromagnetic shielding and the high light transmission simultaneously.

The invention relates to a fiber composite material with a microwave absorbing function and a preparation method thereof. The invention is characterized in that: continuous silica fibers (SiO2f) are introduced to serve as a mechanical property reinforcement and electromagnetic wave absorbing medium, and a matrix material is a SiO2 material or a wave absorbing agent SiO2 material. The content of the continuous SiO2f is 10 to 40 weight percent and the diameter of the continuous SiO2f is 4-15mu m. In the preparation process, polytetrafluoroethylene or organic silicon resin is used as a fiber coupling agent, and polyvinyl acetate (PVA) or polyvinyl butyral (PVB) is used as an adhesive. A composite blank is prepared by the traditional impregnation twisting method, and a hot pressed sintering method is adopted for forming and sintering. The prepared SiO2f / SiO2 composite material has the characteristic of structure and function integration; and the prepared fiber composite material has the microwave shielding attenuation loss reduced from -4dB to -35dB in a frequency band of 8-12GHz compared with a pure molten SiO2 block, keeps invariable return loss and reflection but better shielding effect and is suitable to be used as a wave absorbing material matrix.

The invention relates to a method for producing a microwave shielding function fiber with a skin-core structure by means of melt direct spinning, in particular to a production method for spinning production of the skin-core microwave shielding function fiber by adopting a direct spinning melt and a melt which is produced by a twin-screw to pass through a composite spinning tank and a skin-core composite component, wherein, the direct spinning melt is a sandwich layer; the compositions of skid-core by weight are 75 to 85 percent of core component and 15 to 25 percent of skin component; the compositions of cortical materials of the melt which is produced by the twin-screw by weight are 75 to 85 percent of cortical polymer, 5 to 8 percent of conductive nano powder, 4 to 7 percent of microwave absorbent, 3 to 9 percent of compatibilizer and 0.2 to 4 percent of coupling agent; sandwich layer material of the fiber is 100 percent polymer. The microwave shielding function fiber is produced by means of composite spinning through the composite spinning tank. The invention has the advantages of use of conventional equipment, simple technology, easy operation, low cost and convenience in industrialized promotion and application.

The invention relates to a microwave shielding fibre and its preparation method. It has a skin-core structure whose skin-core volume ratio is 2:8-6:4, skin material composition includes (by wt%) 49-89.8% of skin layer polymer, 10-50% of coductive powder and 0.2-1% of coupling agent; and the core layer material composition includes (by wt%) 13-79.7% of core layer polymer, 20-85% of microwave absorbent and 0.3-2% of compatibility. Its preparation method includes the following steps: 1. uniformly mixing materials according to the formula of skin layer material, extruding by using twin screw extruder and granulating at 180-290 deg.C to make skin layer material of said microwave hielding fibre; 2. uniformly mixing materials according to the core layer material formula, extruding and granulating at 180-280 deg.c to make core layer material; 3. using skin-core composite spinningm achine to make the skin layer material and core layer material into windup filament yarn, drawing at 70-100 deg.C to obtain the invented product.