Patent ID: 9534610
Date: 2017-01-03
CPC Classifications: F04D,F04F

Claim:
1. A fan assembly for generating an air flow within a room, the fan assembly comprising: an impeller and a motor for driving the impeller to draw an air flow into the fan assembly, and a casing having an interior passage comprising an inlet section comprising at least one air inlet through which the air flow enters into the fan assembly, an impeller housing section which houses the impeller and the motor, and a conduit section extending from the at least one air inlet to the impeller housing section which conveys the air flow from the at least one air inlet to the impeller housing section, wherein the inlet section is located upstream from a scroll section having a cross-sectional area that decreases from a scroll inlet section to a scroll outlet section, the scroll inlet section comprising an inlet port for receiving the air flow and the scroll outlet section comprising an outlet port for emitting a first portion of the air flow into the casing, the scroll section having at least one air outlet for emitting a second portion of the air flow from the casing, the inlet section extends about at least part of the scroll section such that air flows in the at least one air inlet through the conduit section adjacent the at least part of the scroll section before entering the impeller housing section in the inlet section in an arcuate path about the at least part of the scroll section; the casing defining a bore through which air from outside the fan assembly is drawn by the air emitted from said at least one air outlet, wherein the air flow passes sequentially through the conduit section, the impeller housing section, the scroll inlet section through the inlet port, and the scroll outlet section where the first portion of the air flow re-enters the scroll inlet section through the outlet port and the second portion of the air flow is emitted through the at least one air outlet.