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, 2004
Filed:
Aug. 30, 2002
Applicant:
Inventors:
Kouichi Satoh, Tokyo, JP;
Seiji Yanagisawa, Tokyo, JP;
Shu Watabe, Tokyo, JP;
Yukihiro Fujita, Tokyo, JP;
Akio Shima, Tokyo, JP;
Yuji Tanaka, Tokyo, JP;
Shinichi Takahashi, Tokyo, JP;
Hiroshi Kunii, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B 2/700 ;
U.S. Cl.
CPC ...
F25B 2/700 ;
Abstract
In the air-conditioning system, a primary side to generate heat includes a heat storage and a heat source and produces cool or warm water using an inexpensive commercial power source such as a nighttime power source. A system collaboration unit is disposed between a motor to drive a water pump and a power source. The unit is connected to the motor via a cable. An output from the inverter is connected to the motor via a cable.