7results about "Ventilation panels with screening provisions" patented technology

This application provides a communication device. The communication device includes a circuit board assembly and a shielding and heat dissipation assembly. The circuit board assembly includes multiple board groups arranged sequentially along a vertical direction. The multiple board groups are electrically connected to each other. The shielding and heat dissipation housing includes a first shielding cavity, a second shielding cavity, and a first heat sink. Along the vertical direction, the circuit board assembly is located between the first shielding cavity and the second shielding cavity. The first heat sink is disposed on the side of the first shielding cavity facing away from the circuit board assembly. A first receiving space is provided within the first shielding cavity. A portion of the circuit board assembly is located within the first receiving space. A second receiving space is provided within the second shielding cavity. A portion of the circuit board assembly is located within the second receiving space. Multiple thermally conductive bumps are provided on the opposing surfaces of the first and second shielding cavities. The thermally conductive bumps are in contact with the circuit board assembly. The communication device of this application can solve the problem of large size caused by heat dissipation and radiation shielding treatment in existing communication devices.

Methods and systems for an electronic package for a vehicle are provided. In one example, the electronic package includes a chassis having a plurality of bent tabs forming a plurality of respective vent openings in the chassis, and a circuit board coupled to the chassis, wherein the bent tabs directly contact the circuit board.

A propulsion system for an aerial vehicle with a suppressed radar observability comprises one or more rotors (100) with rotor blades (no); a fuselage (200), a tubular channel structure (300), and a shielding structure (400). The fuselage (200) provides a support for the one or more rotors (100) and at least one integrated engine (210) to drive the one or more rotors (100), wherein the rotor blades (110) protrude radially outwards from the fuselage (200). The tubular channel structure (300) circumferentially extends around the fuselage (200) and covers the protruding rotor blades (110), wherein the tubular channel structure (300) includes an inlet (310) and an outlet (320) between which the rotor blades (110) are arranged to drive a propulsion airflow (F). The shielding structure (400) is formed at the inlet (310) and / or at the outlet (320) for radar signals to suppress radar detection of the rotor blades (110).

The invention discloses a high-stability high-frequency welding system electromagnetic anti-interference device, and belongs to the technical field of welding, the high-stability high-frequency welding system electromagnetic anti-interference device comprises a mounting plate, the upper surface of the mounting plate is in bolted connection with a shell, the upper surface of the mounting plate is fixedly connected with a motor, the outer wall of the shell is in bolted connection with a material box, and the surface of the shell is fixedly connected with a circulating cooling pipe; the output end of the motor is fixedly connected with a two-way lead screw, and the surface of the two-way lead screw is in threaded connection with a movable plate. According to the high-stability electromagnetic anti-interference device for the high-frequency welding system, firstly, the mounting plate is mounted in the high-frequency welding system, when the temperature in the shell is too high, the motor is started, the pressing plate does reciprocating rectilinear motion in the vertical direction, then cooling liquid in the material box does reciprocating motion in the material box and the circulating cooling pipe, and the cooling effect is achieved; meanwhile, dust on the surface of the heat dissipation opening can be cleaned, the cleaning roller rotates anticlockwise, dust cannot enter the shell, and stability of internal electronic instruments is guaranteed.

Described herein is electromagnetic shielding that is configured to attenuate electromagnetic interference (EMI) by at least a threshold amount when the EMI has a frequency within a predefined frequency range. The electromagnetic shielding includes a layer of metal, such as aluminum foil, and a layer of thermoplastic polymer fabric (such as woven polyethylene fabric), where the electromagnetic shielding has several apertures that extend therethrough. The electromagnetic shielding is at least partially draped over electronic equipment that is to be shielded from EMI.

A thermal component has a shield portion and a heat exchanger portion. The shield portion includes a plurality of cells adapted to inhibit radio radiation (RF) having a frequency within a target frequency range, while the heat exchanger portion includes a plurality of elongated channels, each one of the elongated channels being physically connected to and in fluid communication with at least one corresponding cell of the plurality of cells.

This venting device (1) is configured to be positioned across an opening (5) formed in the wall (7) of a metal housing (3), said device (1) forming a conduit (13) passing through said wall (7) and comprising a membrane (15) filtering the air, impermeable to water and dust, positioned across said conduit (13), the device (1) comprising a metal portion (31) aligned with the opening (5) and having transverse dimensions equivalent to the transverse dimensions of said opening (5), said metal portion (31) being electrically connected to the housing (3). Figure for the abbreviation: Fig. 1