Mitsubishi Electric Corporation

Fuyuki Sato

Toshihiro Mega

Genta Yoshimura

Kenjiro Miura

Sosuke Minamida

Yasutaka Ochiai

Kazuhiro Komatsu

Yoshinori Nakajima

Tomooki Ukiana

Shinichiro Otani

Kazuo Tomisawa

Hiroki Kawano

Nobuaki Tasaki

Masahito Matsushita

Kazuyuki Nagahiro

Tomohiro Narui

Satoko Tomita

Kosuke Iwasaki

Kazumi Ueno

Yosuke Kaneko

Shuichi Murayama

A management device includes: an acquisition unit that acquires operating history data for an equipment device in a prescribed time period; and a classification processing unit that classifies, based on the operating history data acquired by the acquisition unit, an operating pattern of the equipment device in the prescribed time period. The classification processing unit includes: an operating pattern calculation unit that calculates a first operating pattern in a first time period and a second operating pattern in a remaining second time period when the prescribed time period is divided into unit time periods; a change calculation unit that calculates a degree of change in the operating pattern using the first operating pattern and the second operating pattern when the prescribed time period is divided into unit time periods; a split point calculation unit that calculates, as a split time point, a time point where the degree of change satisfies a prescribed condition for the prescribed time period; and a split processing unit that splits the prescribed time period at the calculated split time point.

Management device, management system, and management method for classifying an operation pattern

A refrigeration cycle apparatus includes a refrigeration cycle circuit that has a compressor, a condenser, an expansion device, and an evaporator that are connected through a pipe, the refrigeration cycle circuit being configured to allow refrigerant to circulate in the refrigeration cycle circuit, and a controller configured to determine whether the refrigerant leaks or whether the expansion device malfunctions on the basis of a degree of subcooling at an outlet of the condenser and a degree of superheat at an outlet of the evaporator or a degree of superheat at a suction port of the compressor.

Refrigeration cycle apparatus

A power consumption estimation device () which estimates power consumption of each of one object facility () or more whose operation statuses can be monitored includes: a total power vector generation unit () to acquire time-series data of total power consumption; a status matrix generation unit () to acquire time-series data of an operation parameter of the one object facility () or more; a reference signal generation unit () to generate one reference signal or more; a contribution degree estimation unit () to perform multiple regression analysis by taking the total power consumption as an objective variable, and the operation parameter of the one object facility () or more and a component value of the one reference signal or more, as explanatory variables, to thereby calculate a contribution degree of each of the one object facility () or more; and a breakdown calculation unit () to multiply the contribution degree of the object facility () and the operation parameter of the object facility (), to thereby calculate power consumption of the object facility ().

Power consumption estimation device

Including a data acquisition unit () that periodically acquires various measured temperatures of a liquid pipe (), a gas pipe (), and an intake port from an air conditioner controller (), an operating state determination unit () that determines an operating state of an indoor unit () on the basis of the acquired various measured temperatures, a blowing temperature estimation unit () that estimates a blowing temperature from the indoor unit on the basis of the acquired various measured temperatures and an estimation model set in accordance with the determined operating state, and a blowing temperature display unit () that displays an estimated value of the blowing temperature.

Air conditioner blowing temperature estimation apparatus and computer-readable recording medium

A management system and a management method according to the invention calculate, on the basis of collected weather information, an operation record of a device, a state value and an acceptable range set for an area where the device is installed, and power-suppression-time during which electric power is suppressed, change-time during which the state value of the area is changed in response to the power-suppression-time by operations of the device, generate, using the calculated change-time, a control-schedule for controlling the device, and control the device. This enables reduction of electric power usage with the state value set for the area where the device is installed kept within the range in accordance with the power-suppression-time.

Management system and management method

There is provided air-conditioning control in a low power operation so as not to exceed a target demand power amount in a predetermined measurement period while preventing deterioration of comfortableness of a living space. There include a reducible-power-amount estimation unit configured to calculate, for each group, a reducible power amount by making indoor units perform, for each group, a shut-off operation for a minimum shut-off time in the first half of a demand time limit, and a reduced-power-amount determination unit configured to distribute, when a power consumption amount predicted by a power consumption amount prediction unit exceeds a target demand power amount after the first half of the demand time limit passes, the exceeding power amount to each zone, evenly distribute, in each zone, the distributed power amount to each group, and calculate, based on the reducible power amount of each group, a shut-off time of each group when each group performs the shut-off operation to reduce the distributed power amount.

Demand control device and computer readable medium

An air-conditioning control apparatus controlling a plurality of air conditioners calculates an adjustment time for adjusting a temperature of an area to be adjusted by the air conditioners to be controlled to between a desired temperature and an allowable temperature, generates a control schedule based on the adjustment time, and controls the air conditioners with the generated control schedule, instead of controlling with a preset stop time which is fixed, in order to bring the temperature around the air conditioners to the desired temperature. Thus, the air conditioners can be made to stop heat exchange before the desired temperature is reached, so that power consumption can be reduced.

Air-conditioning control apparatus, air-conditioning control system, and air-conditioning control method

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Tokyo, Japan

Fuyuki Sato