Hitachi, Ltd.

Hitachi, Ltd., Trustee, for the Benefit of Hitachi Air Conditioning Systems Co., Ltd.

Keiji Satou

Masamichi Mochizuki

Tatsuya Sugiyama

Hiroyuki Ueda

Noriyuki Bunkou

Yoshiyukie Yamanashi

Masami Ozaki

In a service system of an air conditioner connected through a network to a monitoring center, the air conditioner receives radio wave transmitted from a GPS satellite to transmit information of the received radio wave and a manufacturer's serial number on the air conditioner to the monitoring center and the monitoring center performs service of the air conditioner on the basis of the received information and the serial number. The service system of the air conditioner can perform service, update or renewal, maintenance and the like of an air conditioner more correctly and exactly and attain speedup thereof.

Monitoring center and service system of air conditioner

An air-conditioning system having a plurality of air conditioners, each air conditioner including an outdoor transmission/receiving unit for transmitting by superposing the operation data on an outdoor power line for supplying power to an outdoor unit and receiving the operation data superposed on the outdoor power line, an indoor transmission/receiving unit for transmitting by superposing the operation data on an indoor power line for supplying power to an indoor unit and receiving the operation data superposed on the indoor power line, an outdoor conversion unit for transmitting by converting the operation data superposed on the outdoor power line into a signal and receiving and superposing the signal on the outdoor power line, and an indoor conversion unit for transmitting by converting the operation data superposed on the indoor power line into a signal and receiving and superposing the signal on the indoor power line.

Air conditioning system

Growing community of inventors

Fujikawa, Japan

Keiji Satou