Filter integrity tester
First Claim
1. A method of testing filter integrity comprising:
- vaporizing a hydrophilic test chemical in air to form a vapor;
injecting the vapor into an inlet air stream of an adsorbent filter;
detecting the existence and concentration of the vapor in an outlet air stream from the filter, the detecting step including;
collecting a portion of the vapor from said outlet air stream from said filter;
generating a volume of clean air,enriching a portion of said volume of clean air with said collected hydrophilic test chemical; and
determining the existence and extent of a leak in the filter.
8 Assignments
0 Petitions
Accused Products
Abstract
An apparatus and method for testing the integrity of a filter under humid conditions is provided. The apparatus includes an injection assembly which is located on a first side of the filter and a detection assembly which is spaced from the injection assembly and located on a second side of the filter. The injection assembly injects a mixture of an air stream and a hydrophilic test chemical vapor of a known concentration through the filter. The injection assembly includes a sealed vaporizer which generates the mixture of the air stream and the hydrophilic test chemical vapor. The vaporizer includes a contact bed having an inert packing media for vaporizing the hydrophilic test chemical. The detection assembly detects a concentration peak of the hydrophilic test chemical vapor exiting the filter. The detection assembly includes a chemical sampling member, a chemical enriching member and a chemical detector. At least one micro-controller communicates with the injection assembly and the detection assembly for controlling same.
27 Citations
11 Claims
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1. A method of testing filter integrity comprising:
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vaporizing a hydrophilic test chemical in air to form a vapor; injecting the vapor into an inlet air stream of an adsorbent filter; detecting the existence and concentration of the vapor in an outlet air stream from the filter, the detecting step including; collecting a portion of the vapor from said outlet air stream from said filter; generating a volume of clean air, enriching a portion of said volume of clean air with said collected hydrophilic test chemical; and determining the existence and extent of a leak in the filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification