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:
Nov. 24, 2015
Filed:
Aug. 06, 2012
Keiji Nagasaka, Tokyo, JP;
Hidetaka Sato, Tokyo, JP;
Koji Nakano, Tokyo, JP;
Shiro Matsubara, Tokyo, JP;
Satoshi Kominami, Tokyo, JP;
Kiyotaka Sumito, Tokyo, JP;
Kenji Shimizu, Tokyo, JP;
Keiji Nagasaka, Tokyo, JP;
Hidetaka Sato, Tokyo, JP;
Koji Nakano, Tokyo, JP;
Shiro Matsubara, Tokyo, JP;
Satoshi Kominami, Tokyo, JP;
Kiyotaka Sumito, Tokyo, JP;
Kenji Shimizu, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD., Kiyosu-shi, JP;
Abstract
A heater control device having at least two PTC heaters having PTC elements includes switching units which are provided so as to correspond to the PTC heaters and which switch an energized state and a non-energized state of the PTC elements by being turned ON and OFF, pattern information which defines state combination patterns of the energized state and the non-energized state of the PTC elements with respect to a required power value for the heater unit, and a ratio controlling unit which when the required power for the heater unit is at an intermediate value of the required power values defined in the pattern information, controls a ratio of the energized state to the non-energized state of the PTC elements based on a ratio of ON time to OFF time for which an average power within a certain period matches the required power.