Sanyo Denki Co., Ltd.

Senju Sprinkler Company Limited

Mitsubishi Electric Corporation

Nohmi Bosai Ltd.

Masashi Murakami

Yutaka Tateishi

Naoki Murakami

Masakatsu Kikuchi

Yuki Iizawa

Souma Araki

Honami Osawa

Kazuhito Funae

Hirotaka Kameishi

Provided is a fan control apparatus which includes: a first sensor; a second sensor; an RF fan; and a controller. The first sensor is provided in a first room, and is configured to acquire a measured value of at least one condition selected from conditions of atmospheric pressure, temperature, and humidity for the first room, the second sensor is provided in a second room adjacent to the first room, and is configured to acquire a measured value of the same condition as the at least one selected condition for the second room, the RF fan is placed at a boundary between the first and second rooms, and the controller is configured to control a rotational speed and rotational direction of the RF fan in such a manner that the measured values of the first and second sensors are the same.

Fan control apparatus and fan control method

A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a deflector, at least one strut, and a guide ring. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The deflector has a receiving surface (valve-element supporting portion) and vanes extending from the receiving surface toward the body. The deflector scatters, outward in axis crossing directions of the nozzle, the fire-extinguishing liquid discharged from the nozzle and received by the receiving surface. The least one strut holds the deflector scattering the fire-extinguishing liquid. The guide ring is movable along the at least one strut and between a tip (main-body-side end portion) of the at least one strut and tips of the vanes.

Sprinkler head

A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a cylindrical frame, a set pin between the valve element and the disassembling unit, and a spring member engaged with the pin. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit includes a plunger having an interior circumferential surface. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The frame includes an upper part connected to the body and a lower part engaged with the disassembling unit. The pin includes a leg inserted in the plunger and including an inclined surface and a straight portion closer to the valve element. The straight portion is in contact with and slidable over the circumferential surface. The breakdown action causes the pin to move, with the inclined surface contacting the circumferential surface.

A cooling fan automatic control system includes: a temperature sensor configured to measure a temperature of an object to be cooled; a plurality of current sensors configured to measure power consumption by each of a plurality of cooling fans; and a controller which, when a measured temperature that is a measured value obtained by the temperature sensor is higher than a target cooling temperature of the object to be cooled, controls rotational speeds of the plurality of cooling fans so as to minimize a total of measured current values of the plurality of cooling fans obtained by the plurality of current sensors.

Cooling fan automatic control system and cooling fan automatic control device

A sprinkler headincludes a head bodyhaving a water discharging cylinderin the interior thereof, a frameconnected to the head body, a valve bodyprovided in the interior of the frameand closing a water discharging portof the water discharging cylinder, a thermosensitive portionconfigured to support the valve body, and a disk springprovided between the valve bodyand the thermosensitive portion. A set screwto be coupled to the thermosensitive portionis provided under the valve body, and the set screwis inserted into a through holeat the center of the disk spring. The set screwincludes a head portion and a leg portion, and the head portion is formed to be higher than the height of the disk spring

The portion of a board corresponding to the surrounding portion of a holeformed through the board is arranged to include a patternless sectionwhere a conductive filmis not provided.

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Tokyo, Japan

Masashi Murakami