Sanyo Denki Co., Ltd.

Katsumichi Ishihara

Honami Oosawa

Yoshihiko Aizawa

Takahisa Toda

Yo Muramatsu

Masahiro Koike

Hikaru Urushimoto

Toshiyuki Nakamura

Akira Nakayama

Hiromitsu Kuribayashi

Tomoaki Ikeda

Masashi Nomura

Naoki Murakami

Atsushi Yanagisawa

Tatsuya Midorikawa

Takashi Kaise

Tomoko Hayashi

Masato Kakeyama

Seiji Nishimura

Honami Ohsawa

An axial fan includes an impeller configured to be driven by a motor and rotate about a rotation axis, a control board configured to supply electric power to the motor, and a cover portion covering the control board, in which a lead wire is attached to the control board, the cover portion includes a top surface facing the control board; and a side peripheral surface extending from the top surface in a direction of the rotation axis, the top surface is provided with a first window portion, the first window portion is configured to allow a potting agent that seals the lead wire to be introduced therethrough, the side peripheral surface is provided with a second window portion, the second window portion is configured to allow the lead wire to be pulled out therethrough, and the first window portion is separated from the second window portion by a bridge portion.

Axial fan having control board cover with windows at top surface and side peripheral surface of control board cover

A measurement device includes: a casing that includes a first air duct with an air inlet; a straightening grid; a first chamber; an opening plate including an opening; a second chamber; pressure sensors configured to measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber; a specific opening configured to allow the opening plate to be replaceable; an open/close portion configured to open and close the specific opening; and a duct forming a second air duct between the measurement device and a measurement target.

Measurement device for measuring airflow volume and a ventilation resistance and having a specific opening for allowing an opening plate to be replaceable and differential pressure measurement arrangement

A measurement device for measuring an airflow volume of a wind-blowing apparatus includes, a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air, an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough, pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct, and an orifice provided on the opening member to change a size of the opening.

Measurement device having variable opening orifice for measuring airflow volume and ventilation resistance of wind blowing apparatus

A waterproof axial flow fan includes: a rotor having a rotating shaft pivotally supported by a bearing in a rotatable manner, an impeller provided to a tip of the rotating shaft and a rotor cover; a stator having a winding and a circuit board, a surface of which is coated with an electrically insulating synthetic resin; and at least one ring collection groove part formed in a resin surface opposing to the rotor cover at an apex of the stator so as to surround a tip of a bearing holding part for holding the bearing.

Waterproof axial flow fan

A measurement device for measuring an airflow volume and a ventilation resistance of a wind-blowing apparatus includes: a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air; an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough; pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct; and an opening member replacing mechanism that forms a part of the air duct, the opening member replacing mechanism being configured to allow the opening member to be replaceable.

Measurement device for measuring airflow volume and ventilation resistance of wind-blowing apparatus

Block components having a conductive property are mounted on lands for connection to a harness so as to increase the height of the lands on a circuit board which is to be connected to windings.

Assembly method of an inline type fan motor

An axial flow fan includes a blade having a curved portion formed in the vicinity of a radially outer end portion positioned opposite to the base portion in the radial direction of the peripheral wall portion of the hub. The curved portion is convex in the rotation direction, concave in the direction opposite to the rotation direction, and extends along the radially outer end portion of the blade. The curved portion extends from a rear end edge of the blade, positioned on a side where one end of the base portion of the blade is positioned, and extends in the radial direction of the hub to the vicinity of a front end edge of the blade, positioned on a side where the other end of the base portion of the blade is positioned and extending in the radial direction.

Axial flow fan

A first motor rotates, in one of two rotating directions, the first impeller including a plurality of front blades in a suction opening portion of a housing. The second motor rotates, in the other rotating direction opposite to the one rotating direction, the second impeller including a plurality of rear blades in a discharge opening portion of the housing. A plurality of stationary blades are arranged between the first impeller and the second impeller in the housing. When the number of the front blades is N, that of the stationary blades is M, and that of the rear blades is P, their relationship is defined as N&#x3e;P&#x3e;M. A length Lof the front blades measured in an axial direction is set longer than a length Lof the rear blades measured in the axial direction.

Counter-rotating axial-flow fan

The present invention provides an axial flow fan capable of increasing an air volume and static pressure more than conventional axial flow fans. A plurality of rotary bladesare disposed in a circumferential direction of a rotary shaftat equidistant intervals. A plurality of stationary bladesare disposed in the vicinity of a discharge openingof an air channel portionof a housing. The stationary blades are disposed in the circumferential direction of the rotary shaftat equidistant intervals. The number of the rotary blades is seven (7) and the number of the stationary bladesis eight (8).

The present invention provides an axial flow fan capable of increasing an air volume and a static pressure more than conventional axial flow fans, and also capable of reducing generation of noise. A guide wall portionis provided to form a guide groovebetween the guide wall portionand one stationary blade. The one stationary bladeis disposed in the vicinity of a lead wire engaging portionprovided at a housing. The guide groovereceives a plurality of lead wiresand guides the lead wiresto the lead wire engaging portion. When the guide wall portionis provided and the lead wiresare received in the guide groove, presence of the lead wiresmay have less adverse effect on the air volume and the static pressure, and may generate less noise.

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.

Brushless fan motor

A first motorrotates, in one of two rotating directions, the first impellerincluding a plurality of front bladesin a suction opening portionof a housing. The second motorrotates, in the other rotating direction opposite to the one rotating direction, the second impellerincluding a plurality of rear bladesin a discharge opening portionof the housing. A plurality of stationary bladesare arranged between the first impellerand the second impellerin the housing. When the number of the front bladesis N, that of the stationary bladesis M, and that of the rear bladesis P, their relationship is defined as N&#x3e;P&#x3e;M. A length Lof the front bladesmeasured in an axial direction is set longer than a length Lof the rear bladesmeasured in the axial direction.

An axial-flow fan with double impellers is provided that can produce a larger amount of air and a higher static pressure than can be achieved with conventional fans. The axial-flow fan with double impellers has a first axial-flow fan unit and a second axial-flow fan unit. The first axial-flow fan unit includes a first case, a first impeller and a plurality of webs that fix a first motor to the first case. The second axial-flow fan unit includes a second case, a second impeller and a plurality of webs that fix a second motor to the second case. The first case and the second case are coupled together to form a housing. The webs of the first axial-flow fan unit and the webs of the second axial-flow fan unit are combined together to form a plurality of stationary webs arranged in the housing. The number of front blades provided at the first impeller is set to five, the number of stationary blades is set to three, and the number of rear blades provided at the second impeller is set to four.

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Nagano, Japan

Katsumichi Ishihara