This utility model discloses a novel internal circulation range hood, including a
smoke extraction box
assembly, a housing
assembly, and a fan
assembly. The housing assembly includes a housing body and a
front cover; the upper opening of the housing body houses a liftable
smoke extraction box assembly. The fan assembly includes a fan body and a fan wheel assembly. The fan body divides the inner cavity of the housing body into a non-communicating front chamber and a rear chamber; the rear chamber is connected to the
smoke extraction box assembly. The area above the fan body in the front chamber forms a smoke exhaust channel, and the areas on the left and right sides of the front chamber form purification channels. The purification channels are connected to the smoke exhaust channels, and purification components are installed within the purification channels. The exhaust vent of the purification channels is located on the front side of the housing body. The smoke extraction port of the fan body is connected to the rear chamber, and the smoke exhaust port is connected to the smoke exhaust channel. This utility model range hood balances high smoke purification efficiency with a small space occupation, is easy to install, and has an overall aesthetically pleasing design. Furthermore, the smoke extraction box assembly moves smoothly and is easy and quick to assemble and disassemble.