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.:
Date of Patent:
Jun. 14, 2022
Filed:
Jan. 18, 2018
Ebm-papst Mulfingen Gmbh & Co. KG, Mulfingen, DE;
Ralph Wystup, Künzelsau, DE;
Markus Humm, Neiβbach, DE;
ebm-papst Mulfingen GmbH & Co. KG, Mulfingen, DE;
Abstract
The present disclosure relates to a device and to a method for detecting filter soiling of a filter system having at least an air filter installed in an air duct and an electrically controlled fan for producing an air flow in the air duct, wherein the device comprises at least a motor controller for controlling the fan motor by means of PWM control and an evaluating apparatus for determining the actual rotational speed (n) of the fan in accordance with the actual degree of modulation (T) of the motor current for achieving the present rotational speed (n), wherein, in the evaluating apparatus, setpoint value pairs (n, T) for the setpoint rotational speed (n) at a certain degree of modulation (T) are also stored, as well as a comparator in order to compare the actual value pairs (n, T) with the setpoint value pairs (n, T) and to obtain the degree of filter soiling of the air filter therefrom.