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Browse Prior Art Database

Rear Turbulence Control

IP.com Disclosure Number: IPCOM000049674D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Pulaski, L: AUTHOR

Abstract

This article teaches that turbulent air in vertical laminar flow work station can be controlled and effectively eliminated, thus preventing any significant build-up of contamination in the rear of the station.

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Rear Turbulence Control

This article teaches that turbulent air in vertical laminar flow work station can be controlled and effectively eliminated, thus preventing any significant build-up of contamination in the rear of the station.

In present vertical, laminar flow, work stations the air flow at the rear of the station is turbulent, causing contamination build-up which is detrimental to any product therein. This problem has now been solved by providing a variable self- controlling pressure relief at the rear of the station and level with the bench surface 12 which permits a controlled constant amount of air to exit thereby effectively eliminating turbulence in the station.

As shown in the figure, the variable self-controlling pressure relief mechanism 10 is a louvered grate composed of a plurality of parallel louvers 13 each of which is suspended by pivot pins at each end (not shown) and balanced so that each louver will normally be closed but will automatically open when air flows into the station. The amount of exhaust is controlled by the size of the louvers which are designed to permit a constant percentage of the air flow into the station to exit. If we assume a 6'-wide station 2.5' in depth with a flow of 1500 cubic feet of air per minute flowing into the station, a 3"x6" louver grate permits a 10% exhaust of air at the rear of the station and this prevents turbulence in the station.

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