Patent ID: 9746195
Date: 2017-08-29
CPC Classifications: F24F

Claim:
1. A ceiling mounted ventilation fan comprising: a main housing; and a fan unit installed in the main housing, wherein the main housing includes a first opening communicating with a duct connected to an air outlet of the fan unit, and a second opening provided in a bottom part of the main housing so as to communicate with an interior of a room by being positioned adjacent to an aperture in a ceiling of the room, the fan unit includes a fan, and a fan casing positioned so as to surround the fan, the fan casing having an air inlet opened in the main housing, the fan casing includes a first engagement member releasably engaged with the first opening of the main housing, and a second engagement member releasably engaged with an inner wall of the main housing, and the fan casing is located in an installed position that is shifted, in a horizontal direction, with respect to a position vertically aligned with the second opening, the fan casing being slidably movable in the horizontal direction in relation to the main housing, wherein positioning of the fan casing in the installed position in the main housing is achieved when the first engagement member is engaged with the first opening and the second engagement member is engaged with the inner wall of the main housing, and visual confirmation of a state of engagement between the second engagement member and the inner wall of the main housing is provided through the second opening when the positioning of the fan casing in the installed position is achieved, the second opening, the inner wall and the second engagement member being configured to provide the visual confirmation.