LOW NOISE AIR CIRCULATION DEVICE

摘要

An air warmer has a housing whereinto is positioned a noise reduction mechanism having a casing that encases a sound reducing structure having a maze like cavity. An axial fan is positioned within the sound reducing structure. In operation, air is drawn into the sound reducing structure by the fan along a first tortuous passage. The air is directed by the fan through another tortuous passage to an air outlet to inflate a convective blanket with an air hose connected to the air outlet. The configuration of the maze like cavity and the material from which the nosie reducing structure is formed reduce the noise generated by the fan. A heater is provided proximate to the air outlet to heat the output air. A filter is provided at the air inlet to filter the ambient air drawn into the warmer.

主权项

1. An air blower, comprising:
a housing having an inner wall defining a chamber, an inlet and an outlet; a noise reducing mechanism within the chamber having one and other tortuous passages; and a fan having an air intake and an air exhaust in fluid communication with the one and other tortuous passages, respectively; wherein the one tortuous passage establishes an air input path between the inlet of the housing and the air intake of the fan, and the other tortuous passage establishes an air output path between the outlet of the housing and the air exhaust of the fan; wherein air is drawn into the housing via the inlet and output from the housing via the outlet; and wherein when a convective blanket is coupled to the outlet of the blower, the blanket is inflated by the air output from the outlet.