Air-curtain device

Abstract

Disclosed is an air-curtain device (1) which can be positioned across the top of an openingsuch as a doorway (2), and comprises main air driving means (3) for providing a main airstream across the opening (2) to form a main air-curtain (4), and lateral air driving means (5) for providing a lateral airstream angled relative to the airstream from the main air driving means (3) to form a lateral air-curtain (6).

Description

BACKGROUND OF THE INVENTION[0001]An air-curtain or air-door provides a directed flow of air, or an airstream, across a doorway, entrance or other opening in order to provide separation between the masses of air on either side of the opening. Commonly, an air-curtain is provided by a downwardly directed blower fan, which produces a continuous flow of air across the full extent of the opening. Such a flow of air impedes mixing of the air masses on either side of the opening. The air blown from the air-curtain may be heated. This is particularly relevant where there is a temperature difference between the air on either side of the opening, and it is desired to keep the air on one side of the opening (normally the inside of a building) warm. Conversely, the air may be cooled where it is desired that the air on the inside of the building be kept cooler than that on the outside.[0002]In order to work efficiently, the air-stream produced by the air-curtain device should travel directly acr...

AI Technical Summary

Benefits of technology

[0003]According to a first aspect of the invention, there is provided an air curtain device according to claim 1. In accordance with this aspect, provision of lateral air driving means, which deliver an air-curtain which is angled to that of the main air driving means, all

Problems solved by technology

Such a flow of air impedes mixing of the air masses on either side of the opening.

This results in a red

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