Humidification apparatus

Claim 1

Apparatus for humidifying and evaporatively cooling the air in a room, comprising: an enclosure having an inlet port for receiving room air; a fogging chamber in said enclosure, communicating with said input port; an outlet port communicating with said fogging chamber for returning air to the room; a circulating fan for creating a draft of air through said inlet port, fogging chamber, and outlet port; an ultrasonic fogging device disposed in said fogging chamber, the fogging device including: a nozzle having an elongated open-ended passageway formed therein for receiving a supply of compressed air and an opening which communicates with said passageway through which a supply of water can enter the passageway; a parabolic resonator cup spaced from and facing the opening of the nozzle passageway; manually adjustable mounting means for said resonator cup for manually adjusting the spacing between said resonator cup and the opening of the nozzle passageway; said fogging device being oriented in said fogging chamber such that said spacing is transverse the direction of air circulation through said chamber; and a filter disposed in said enclosure in the path of the humidified and cooled air from said fogging chamber, said filter containing silica to combine with calcium-containing residue in the humidified air.