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. 02, 2010
Filed:
Apr. 26, 2005
Keizo Matsui, Hyogo, JP;
Hiroshi Hasegawa, Osaka, JP;
Fumitoshi Nishiwaki, Hyogo, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma-shi, JP;
Abstract
The present invention realizes a reliable heat pump apparatus and heat pump apparatus having high recovering efficiency. The heat pump apparatus includes an expanderfor expanding working fluid, a permanent magnet type synchronization power generatorwhich is disposed for recovering power by the expanderand which generates three phase AC power, and a first converterwhich converts the AC power to DC power, and which rotates the power generatorat a predetermined target number of revolutions by switching of a switching element group. The generated electricity is consumed by connection of an AC power supplyto a DC power line which is rectified and smoothened by a rectifier circuitand a smoothing capacitor, and by driving of an electric motorwhich rotates a compressorthrough a motor drive apparatus, and the power is efficiently recovered.