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:
Oct. 03, 2017
Filed:
May. 29, 2014
Delta Electronics, Inc., Taoyuan Hsien, TW;
Jung-Yuan Chen, Taoyuan Hsien, TW;
Yen-Hung Chen, Taoyuan Hsien, TW;
Ching-Sen Hsieh, Taoyuan Hsien, TW;
Yueh-Hsin Liu, Taoyuan Hsien, TW;
Chen-Chien Kao, Taoyuan Hsien, TW;
Shih-Yuan Chiang, Taoyuan Hsien, TW;
Jian-Cun Lin, Taoyuan Hsien, TW;
DELTA ELECTRONICS, INC., Taoyuan Hsien, TW;
Abstract
An anti-air-return fan system includes a motor, a driving control circuit, and a rotation judgment circuit. The driving control circuit is electrically connected to the motor. The driving control circuit has a driving signal for driving the motor to rotate according to the driving signal. The rotation judgment circuit outputs a judgment signal to the driving control circuit when detecting that the motor reversely rotate. The driving control circuit executes a braking according to the judgment signal. The driving control circuit drives the motor to operate when the rotation judgment circuit detects that the motor doesn't rotate reversely.