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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9200995 B1

PDFFull Text
Date of Patent:
Dec. 01, 2015

Filed:

Jan. 24, 2013

Method and apparatus for monitoring air filter condition

Applicant:

Abb Oy, Helsinki, FI;

Inventors:

Jero Ahola, Lappeenranta, FI;

Jussi Tamminen, Lappeenranta, FI;

Tero Ahonen, Lappeenranta, FI;

Assignee:

ABB TECHNOLOGY OY, Helsinki, FI;

Attorney:

Buchanan Ingersoll & Rooney PC

Primary Examiner:

Carol S Tsai

Int. Cl.
CPC ...
G01N 15/08 (2006.01); B01D 46/00 (2006.01); B01D 46/44 (2006.01); H01L 21/67 (2006.01); F24F 11/00 (2006.01); F04D 27/00 (2006.01); F24F 3/16 (2006.01);
U.S. Cl.
CPC ...
G01N 15/082 (2013.01); B01D 46/0086 (2013.01); B01D 46/444 (2013.01); F04D 27/001 (2013.01); F24F 3/161 (2013.01); F24F 11/0078 (2013.01); F24F 11/0079 (2013.01); H01L 21/67253 (2013.01); Y02B 30/746 (2013.01);
Abstract

A method and apparatus are disclosed for monitoring accumulation of dirt on an air filter of a ventilation system including the filter and a fan controlled by a frequency converter. An initial value for an operating parameter is determined. A present operating point is determined based on a characteristic curves, and the mechanical power and rotational speed of the fan. A present value for the operating parameter is determined based on the present operating point, and accumulation of dirt is determined on the air filter based on the initial and present values of the operating parameter.

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Ahola, Jero. (2015). Method and apparatus for monitoring air filter condition (U.S. Patent No. 9200995). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9200995

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