Patent ID: 8702483

Claim:
An assembly of pipe hood and pipe unit for a ventilating fan, comprising; a front cover, a rear cover; a pipe unit; a baffle vertically provided in the pipe unit to divide the pipe unit into an air inlet pipe and an air outlet pipe on left and right sides respectively; a partition plate vertically provided in the rear cover corresponding to the baffle to divide the space enclosed by the front cover and the rear cover into an air inlet side and an air outlet side on the left and right sides respectively; an external air inlet opening and an external air outlet opening provided on an outer side of the rear cover on the left and right sides respectively; an internal air inlet opening and an internal air outlet opening provided on an inner side of the rear cover on the left and right sides respectively; and an air inlet passage and an air outlet passage formed in parallel to each other on the left and right sides respectively, wherein the internal air inlet opening is provided with an extended wall adjacent to the partition plate, the extended wall spanning a portion of the partition plate, the partition plate is provided with raised portions that are raised toward the air inlet side on an air inlet side of said portion of the partition plate spanned by the extended wall, and there is no raised portion raised toward the air outlet side on an air outlet side of said portion of the partition plate spanned by the extended wall, and the partition plate is provided with at least one raised portion that is raised toward the air outlet side on an air outlet side of a remaining portion of the partition plate not spanned by the extended wall.