Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Hidesuke Hayakawa

Hirotaka Masui

Takashi Ikeda

Shigeo Takata

Shinji Hattori

Masafumi Ando

A first communication section in an optical communication interface communicates with outdoor units and indoor units using a first communication method. A central management controller communicates with the optical communication interface using the first communication method and manages the outdoor units and the indoor units according to the first communication method. A second method communication section in a second communication method indoor unit of a different manufacturer communicates with a second method communication section in a second communication method outdoor unit using a second communication method. The optical communication interface and the second communication method indoor unit exchange information by optical communication with each other using respective optical communication sections.

Equipment item management system, control method thereof, and equipment item management apparatus

Even at spots, such as a window side and the back side of a room, where air conditioning loads are different from each other, comfortable air conditioning is obtained at low cost using a common air conditioning unit. One indoor apparatus and wireless transceiver having a ZigBee-compliant transmission device are installed in the room. Sensor units having temperature/humidity sensors and ZigBee-compliant wireless transceivers are installed at plural indoor spots where the air conditioning loads are different from each other. A controller in the indoor-apparatus receives sensor information (temperature/humidity information) via the wireless transceivers from the sensor units, and computes a weight average based on the sensor information and weight values that are pre-stored in the storing devices and that correspond to the sensor units. Using the computed value as a control value, the controller controls an air conditioning unit.

Air conditioning system

An owner concludes with a facility maintenance company a contract for maintenance of electric facilities and an operation control monitor device installed in a building of the owner. The electric facility manufacturer gives the company permission to access the device from a terminal through the Internet as a communication network. The company receives continuous monitor data items of the electric facilities collected by the device. The manufacturer accesses the device from a terminal through the network and also receives the continuous monitor data items of the electric facilities.

Growing community of inventors

Tokyo, Japan

Hidesuke Hayakawa