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. 31, 2000
Filed:
Oct. 01, 1998
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kanagawa-Ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
361694 ; 361690 ; 361695 ; 361704 ; 361720 ; 174 161 ; 16510433 ; 16510434 ; 165185 ;
Abstract
In an enclosed control device including a casing enclosing an electronic circuit in a closed state, a centrifugal fan is also enclosed in the casing for enhancing the cooling of the electronic circuit. With a smoothing capacitor and a semiconductor element heating up, a temperature in the casing increases. Air flows to the side of the centrifugal fan. After passing through the centrifugal fan, the air disperses in the directions along the inner wall of the casing. This flow of air enhances heat transmission from the heated up smoothing capacitor and the semiconductor element to the air, and heat transmission from the air to the casing.