Patent ID: 9700822
Date: 2017-07-11
CPC Classifications: B01D

Claim:
1. An air exchange device comprising: an air-guiding tube having a first end and a second end opposite to each other, with the first end having a first inlet and a first outlet, and with the second end having a second inlet and a second outlet; a partition arranged inside the air-guiding tube to completely divide the inside of the air-guiding tube into a first air-guiding space and a second air-guiding space, wherein the partition prevents air flow between the first and second air-guiding spaces, with the first air-guiding space communicating with the first inlet and the second inlet, and with the second air-guiding space communicating with the first outlet and the second outlet; a first filter filtering air flow through the first inlet of the first air-guiding space of the air-guiding tube; a second filter filtering air flow through the second inlet of the first air-guiding space of the air-guiding tube; and at least one fan adapted to draw and expel air and combined with the air-guiding tube; wherein bores of meshes of the first filter are larger than bores of meshes of the second filter.