| 摘要 |
An assembly of pipe hood and pipe unit for a ventilating fan, comprising a front cover, a rear cover and a pipe unit, characterized in that: a baffle is vertically provided in the pipe unit to divide the pipe into an air inlet pipe and an air outlet pipe on the left and right sides respectively; a partition plate is 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 are provided on the outer side of the rear cover on the left and right sides respectively; an internal air inlet opening and an internal air outlet opening are provided on the inner side of the rear cover on the left and right sides respectively; an air inlet passage and an air outlet passage are formed in parallel to each other on the left and right sides respectively. Since the inflow air and the outflow air flow to the left and right sides respectively, the contaminated air discharged from the pipe unit can be prevented from mixing with the fresh air entering the room, and the ventilating effect can be ensured.
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