Sanyo Electric Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Tsuyoshi Kawaai

Masaru Koshiba

Ken Aoki

Hideki Nakajima

Kazuhiro Sekiguchi

Teruo Shimizu

Takayuki Matsuhashi

Atsushi Ohuchi

A cooling systemis constructed to have a refrigeration circuitin which low-temperature showcasesas plural load facilities are connected to a rack system refrigerating machinein parallel through refrigerant pipesand, a main controllerfor generating and outputting control data of compressorsconstructing the rack system refrigerating machineon the basis of the cooling state of the low-temperature showcases, and a compressor controllerwhich is constructed to acquire control setting required for capacity control of the compressorsas main elements of the rack system refrigerating machine, receives control data from the main controllerand controls the compressorson the basis of the control setting and the control data.

Cooling system

In a controller for a refrigerating system including refrigerating machines and showcases, a showcase that is about to execute a defrost operation is detected on the basis of a defrost operation indicating information. When the controller receives a notification indicating start of the defrost operation from the showcase concerned or on the basis of a comparison result between a pre-stored defrost-operation start time and the present time, at least one of the refrigerating machines is instructed to reduce the output power thereof. When the showcase finishes the defrost operation, the at least one of the refrigerating machines is instructed to increase the output power thereof so that the output power of the refrigerating machine is set to stationary output power.

Controller and control method for refrigerating system

According to a controller for a cooling system, when an optimum value of a low-pressure side pressure set value corresponding to an operation environmental condition to be generated is registered in a data base, the optimum value of the low-pressure side pressure set value is used. In a case where the optimum value of the low-pressure side pressure set value is not registered in the data base, when an optimum value of a low-pressure side pressure set value Ps corresponding to an operation environmental condition adjacent to the operation environmental condition to be generated is registered, the optimum value of the low-pressure side pressure set value Ps is used.

Controller for cooling system

A demand control systemaccording to the present invention includes a CPUand a power database. The power databasestores actual data in a state where the actual data are classified according to environmental conditions, the actual data being based on a consumption integration value of power actually consumed by the power consuming device. The CPUcalculates a predicted integration value of power predicted to be consumed in the demand time period, by using contents stored in the power databaseat a start or before the start of the current demand time period. Further, the CPUlowers a power target value when the calculated predicted integration value falls below the power target value being a target value of the power to be consumed in the demand time period.

Demand control system, demand controller, demand program, and demand controlling method

A monitoring system is provided for remotely monitoring in-store equipment. A controller is provided in each store for monitoring and controlling in-store equipment. A monitoring computer is connected to the controller in each store through a communication line. The controller includes data transmission means for transmitting to the monitoring computer data related to each in-store equipment and predetermined measurement data, and display means for displaying power saving advice information fed from the monitoring computer, and the monitoring computer comprising power saving advice information production means for producing power saving advice information for efficiently operating each in-store equipment on the basis of the data received from the controller, and power saving advice information transmission means for transmitting to the controller the produced power saving advice information.

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Uji, Japan

Tsuyoshi Kawaai