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:
Feb. 27, 2007
Filed:
Apr. 27, 2004
Yoshiaki Kurita, Shimizu, JP;
Kuniaki Takatuka, Fujieda, JP;
Tatsuo Ando, Shimizu, JP;
Noriaki Yamada, Shimizu, JP;
Satoshi Furusawa, Shimizu, JP;
Yoshiaki Kurita, Shimizu, JP;
Kuniaki Takatuka, Fujieda, JP;
Tatsuo Ando, Shimizu, JP;
Noriaki Yamada, Shimizu, JP;
Satoshi Furusawa, Shimizu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An inverter device for variably controlling an operating frequency of an electric motor, which drives a compressor in a refrigerating cycle. the inverter includes a box-like resin case, having a metal film for shielding being applied or plated on a surface thereof and having a step portion on which a terminal block for the motor is arranged. A first substrate having mounted thereon power semiconductor devices constituting a converter and an inverter so as to be immersed in gel, and the first substrate is mounted in the case and brought into proximity of radiation fins at a reverse surface thereof. A second substrate having mounted thereon interface connectors into which signals from detection sensors for temperatures and pressures in the refrigerating cycle are input and photo-couplers for transmitting the input signals, and the second substrate is mounted in the case above the first substrate.