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:
Mar. 23, 2004
Filed:
May. 30, 2002
Yoshichika Hirao, Neyagawa, JP;
Naoki Kaise, Higashiosaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A cooling fan controller controls a voltage for driving a cooling fan on the basis of a temperature detected by a temperature sensor. A first controller controls voltage for driving the cooling fan to a minimum voltage for starting the cooling fan. A second controller controls the voltage for driving the cooling fan to a driving voltage value corresponding to the detected temperature after the cooling fan is started. A relationship between the detected temperature in the voltage for driving the cooling fan is such that the higher the detected temperature becomes the larger the voltage for driving the cooling fan becomes. A predetermined minimum voltage for cooling fan control is lower than the minimum voltage for starting the cooling fan and a predetermined maximum voltage for cooling fan control is higher than the minimum voltage for starting the cooling fan.