2results about How to "Does not affect discharge" patented technology

The utility model provides a cover device for the door and window drain hole and door and window, the cover device for the door and window drain hole comprises a metal cover plate and a metal gauze, the metal cover plate is provided with a through hole, the area of the through hole can at least cover the door and window drain hole, the metal cover plate is also provided with a clamping structure, and the metal gauze is arranged on the metal cover plate. The clamping structure is used for being clamped in the door and window drain hole to fix the metal cover plate; the metal gauze element is arranged on one side of the metal cover plate and can cover the through hole. By the adoption of the cover device for the door and window drain hole, accumulated water in the door and window can flow to the external environment through the metal gauze and the drain hole, meanwhile, foreign matter in the external environment can be prevented from entering a room due to blocking of the metal gauze, and particularly mosquitoes and the like are blocked outside the metal gauze.

The utility model relates to a kind of foreign matter prevention heat dissipation structure and wireless charging device, wherein foreign matter prevention heat dissipation structure includes: mounting seat, including the air duct extending along height direction;And fan assembly, including fan seat and fan, the fan seat is connected with the mounting seat to form cavity, the fan is located in the cavity, the cavity is communicated with one end of the air duct, the other end of the air duct forms air outlet, the air outlet is equipped with non-woven fabric.The utility model can effectively block the invasion of external foreign matter from air outlet into air duct inside while not affecting the exhaust of heat dissipation airflow, ensure the heat dissipation efficiency and service life of heat dissipation structure.