9 results about "Microwave shielding" patented technology

This utility model provides a vehicle-mounted microwave oven, including a shell and a door assembly. The door assembly is movably connected to the shell via a door hinge. The door assembly includes a door / window panel, a door frame, a door body, and a shield arranged sequentially from left to right. The door body has U-shaped folds arranged at intervals along its edges. The door body also has ear plates located between adjacent U-shaped folds. The ear plates are used to fix the door frame. The minimum distance between the ear plates and the door / window panel is A, and the minimum distance between the U-shaped folds and the door / window panel is B, where A < B. The vehicle-mounted microwave oven of this application allows the door body and the shield to fit tightly together, reducing the thickness of the door body and thus reducing the overall volume of the microwave oven, reducing space occupation, and facilitating microwave oven installation. The U-shaped folds arranged at intervals along the edge of the door body also have an excellent microwave shielding effect.

The utility model provides a tunnel type microwave sterilization device of fermented tobacco, include: conveyer belt, is used for conveying tobacco; Resonant cavity forms multiple microwave feed openings, microwave feed opening is used for introducing microwave into resonant cavity, the conveyer belt passes through resonant cavity setting; Microwave generator has multiple magnetrons for generating microwave, multiple magnetrons are through microwave shielding pipeline and are oriented to multiple microwave feed openings. In the scheme of the utility model, microwave feed opening introduces the microwave generated by microwave generator into resonant cavity, carries out microwave sterilization treatment to the tobacco that flows through resonant cavity, utilizes the high penetration characteristic of microwave, realizes the synchronous heating of inside and outside material, through the synergistic effect of microwave thermal effect and non - thermal effect, directly destroys microorganism DNA and cell structure especially has the remarkable killing effect to the stubborn microorganism such as heat -resistant bacillus.

This invention provides an electromagnetic shielding device for a microwave transmitter, belonging to the field of microwave shielding technology. The device comprises: a microwave absorbing component that absorbs microwaves from the microwave transmitter and converts them into heat through a conductive liquid; the microwave absorbing component is connected to a heat dissipation and cooling system for heat dissipation; the microwave absorbing component includes: several conductive liquid pipes arranged regularly and tightly attached to the microwave transmitting antenna; a fixing frame for supporting the conductive liquid pipes; a water pump; and a flow pipe; the heat dissipation and cooling system includes: a liquid storage cavity and a cooling fan; the flow pipe connects the liquid storage cavity and the conductive liquid pipes, and the water pump circulates the conductive liquid between the conductive liquid pipes and the liquid storage cavity; the cooling fan is arranged on the liquid storage cavity to dissipate heat from the conductive liquid within the cavity. By absorbing microwaves from the microwave transmitter and converting them into heat through the conductive liquid, and then having the heat carried away by the cooling fan, the electromagnetic shielding effect of the microwave transmitter is achieved.

The application discloses a cover assembly and a microwave cooking appliance applying the same, and relates to the technical field of kitchen appliances. The cover assembly comprises an inner cover and a microwave shielding door. The microwave shielding door is elastically connected with the inner cover through an elastic element. One side of the microwave shielding door, which is opposite to the inner cover, is provided with a closed end face. The closed end face is used for abutting against the pot body assembly, so that the microwave cavity can be closed. The elastic force direction of the elastic element is arranged at an angle with the plane where the closed end face is located. The microwave shielding door further comprises a choke structure, which is used for eliminating the microwave escaping from the gap between the microwave shielding door and the pot body assembly. The technical scheme provided by the application aims to reduce the gap between the cover assembly and the pot body assembly, improve the airtightness between the cover assembly and the pot body assembly, and avoid microwave leakage.

This invention discloses a high-power microwave shielding composite material and its preparation method. The composite material includes a CNT composite layer and an MXene composite layer, which are stacked together. The CNT composite layer is composed of a mixture of modified MVQ and modified CNTs, with the modification of MVQ and CNTs used to achieve uniform dispersion of CNTs in MVQ. The MXene composite layer is composed of a mixture of modified MVQ and modified MXene, with the modification of MVQ and MXene used to achieve uniform dispersion of MXene in MVQ. The preparation method modifies CNTs, MVQ, and MXene to ensure good dispersion of both CNTs and MXene in MVQ, thereby preparing the stacked CNT and MXene composite layers. This results in superior HPM shielding performance, reduced overall filler loading, and decreased surface DC conductivity.

The application discloses a kind of photovoltaic PCB solder mask ink microwave baking device, including microwave baking cavity, adjustable power microwave generator, multipoint temperature sensor, microwave homogenizer, multilayer anti-static storage rack, microwave shielding device, exhaust cooling system and intelligent control module, the photovoltaic PCB solder mask ink microwave baking device, without complex hot air circulation system, equipment energy consumption compared with traditional oven reduces 40% or so, saves production energy consumption cost;Baking process does not need hot air preheating, start-up can be put into use, and segmented power control can adapt to the baking needs of different specifications PCB board, different thickness solder mask ink, strong universality;While the device is equipped with microwave shielding and exhaust protection structure, operation is safe and reliable, without changing the overall process layout of PCB solder mask process, only replacing baking equipment, easy to interface with existing production line, without substantially modifying production line.

The application discloses a kind of multistage circulating rubber devolatilization device and method based on microwave-infrared coupling heating, belong to high polymer material processing technical field.The device includes quartz glass jar body, metal microwave shielding cavity, microwave generator, infrared lamp tube, multistage drop bar distributor and bottom direct connection screw pump.The application utilizes microwave volume heating to directly heat rubber melt, supplemented by infrared radiation to compensate surface temperature drop, avoid the rubber thermal crosslinking coking caused by traditional wall heating.The device uses intermittent circulation process, by switching coarse hole, medium hole and micropore distributor online, cooperate with the gradient regulation of vacuum degree and temperature, make rubber solution form drop bar matching its rheological property in different devolatilization stage.Bottom wide-neck screw pump realizes zero liquid holdup direct discharge, eliminate flow dead angle.The application effectively realizes the efficient, mild devolatilization of high viscosity heat-sensitive synthetic rubber, and the final volatile content can be stably controlled below 500ppm, and the product does not occur obvious thermal crosslinking.

The present invention provides an on-line instant drying device and method for 3D printing consumables based on microwave, belonging to the technical field of 3D printing. The device includes a microwave shielding resonant cavity, a microwave source, a PTFE microwave transparent catheter, a hot air blower, an infrared temperature measuring probe, a PID controller and an exhaust hole; microwave chokes and cutoff waveguides are provided at the inlet and outlet of the resonant cavity, and the catheter forms a folded-back structure in the cavity, and the consumables pass through the resonant heating area multiple times; the microwave source emits microwaves of 0.3 GHz to 300 GHz to achieve volume heating, and is combined with hot air scavenging and moisture removal. The infrared temperature measurement and the PID controller constitute a high-precision closed-loop temperature control, which can be compatible with the linkage expansion of solid-state microwave sources and humidity sensors. The beneficial effects of the present invention: Abandoning the off-line baking of the whole roll and adopting on-line flow instant drying, solving the contradiction between the standing wave in the microwave cavity and the space utilization rate, achieving second-level dehydration, plug-and-play, high efficiency and energy saving, and avoiding the thermal aging of the consumables, with microwave leakage protection, applicable to the on-line drying of FDM 3D printing engineering consumables such as PA nylon, PC, and TPU.