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. 19, 2019
Filed:
Dec. 14, 2011
Kazunori Hatakeyama, Tokyo, JP;
Syota Kamiya, Tokyo, JP;
Kenta Yuasa, Tokyo, JP;
Shinya Matsushita, Tokyo, JP;
Shinsaku Kusube, Tokyo, JP;
Tsutomu Makino, Aichi, JP;
Kazunori Hatakeyama, Tokyo, JP;
Syota Kamiya, Tokyo, JP;
Kenta Yuasa, Tokyo, JP;
Shinya Matsushita, Tokyo, JP;
Shinsaku Kusube, Tokyo, JP;
Tsutomu Makino, Aichi, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A heat pump device includes an inverter control unit for controlling an inverter. The inverter control unit includes a constraint-energization control unit that, during operation standby of a compressor, determines whether heating to the compressor is necessary, on the basis of a refrigeration stagnation amount in the compressor, and, when having determined that heating to the compressor is necessary, selects, according to the refrigeration stagnation amount, any one of direct-current energization for supplying a direct-current voltage to the motor and high-frequency energization for supplying a high-frequency voltage having a frequency higher than a frequency during a normal operation to the motor, so as to output a constraint energization command for carrying out constraint energization of the motor; and a driving-signal generating unit that generates a driving signal on the basis of the constraint energization command.