Sanyo Denki Co., Ltd.

Naoki Murakami

Masashi Murakami

Takashi Kawashima

Katsumichi Ishihara

Hiromitsu Kuribayashi

Souma Araki

Honami Osawa

Koji Ueno

Naoya Ozumi

A waterproof fan includes: a rotating blade configured to be rotatable about a rotation axis; a rotor including a permanent magnet; a stator including a plurality of stator cores located on an inner diameter side relative to the rotating blade, the plurality of stator cores extending in a radial direction relative to the rotation axis, and windings each wound around a respective stator core; a circuit board electrically connected to the windings; a waterproof cover including a first resin, the waterproof cover covering the circuit board; and a molded portion including a second resin, the molded portion covering at least the stator, the waterproof cover includes: a partitioning portion separating the windings from the circuit board; and a protruding portion protruding from the partitioning portion into a space between the windings, and gaps between the windings, and the partitioning portion and the protruding portion are filled with the second resin.

Waterproof fan

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 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 brushless fan motor, in which cooling effect on a stator may be enhanced, is provided. A center through hole is formed in a center of a bottom wall portion of a first brushless fan motor. Vane portions are formed on an inner wall portion of the brushless fan motor and are formed into a shape which allows ambient air to be drawn in through the center through hole. Through holes are formed in an end plate portion of the first brushless fan motor in order to introduce the ambient air, which has been drawn in through the center through hole, inside a rotor cover.

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Tokyo, Japan

Naoki Murakami