Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An axial-flow fan according to the present disclosure can increase the amount of the airflow and simultaneously reduce the noise level. A plurality of stationary blades 11A to 11D are curved, in a convex manner, toward a rotating direction of an impeller. The plurality of stationary blades 11A to 11D are generally inclined so that discharge-side edge portions 11d thereof are located more forward than suction-side edge portions 11c thereof in the rotating direction. An inclination angle ?4 of each of the plurality of stationary blades 11A to 11D in the vicinity of the external end portion 11a is larger than the inclination angle ?3 in the vicinity of the internal end portion 11b. The inclination angle is gradually changed from the vicinity of the external end portion 11a toward the vicinity of the internal end portion 11b.

Abstract: 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>P>M. A length L1 of the front blades measured in an axial direction is set longer than a length L2 of the rear blades measured in the axial direction.

Abstract: 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 blades 5 are disposed in a circumferential direction of a rotary shaft 8 at equidistant intervals. A plurality of stationary blades 11 are disposed in the vicinity of a discharge opening 16 of an air channel portion 19 of a housing 3. The stationary blades are disposed in the circumferential direction of the rotary shaft 8 at equidistant intervals. The number of the rotary blades is seven (7) and the number of the stationary blades 11 is eight (8).

Abstract: 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 portion 33 is provided to form a guide groove 31 between the guide wall portion 33 and one stationary blade 11. The one stationary blade 11 is disposed in the vicinity of a lead wire engaging portion 25 provided at a housing 3. The guide groove 31 receives a plurality of lead wires 10 and guides the lead wires 10 to the lead wire engaging portion 25. When the guide wall portion 33 is provided and the lead wires 10 are received in the guide groove 31, presence of the lead wires 10 may have less adverse effect on the air volume and the static pressure, and may generate less noise.

Abstract: A counter rotating axial flow fan that reduces vibration generation over a wide rotational speed range. A disk-shaped cushioning member is disposed between a circular plate portion of a first support frame main body half portion and a circular plate portion of a second support frame main body half portion. The cushioning member is compressed, with hook portions forming a plurality of engaging portions and hole portions forming a plurality of engaged portions completely engaged with each other.

Abstract: 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.

Abstract: 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.

Abstract: 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>P>M. A length L1 of the front blades measured in an axial direction is set longer than a length L2 of the rear blades measured in the axial direction.

Abstract: 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 blades 5 are disposed in a circumferential direction of a rotary shaft 8 at equidistant intervals. A plurality of stationary blades 11 are disposed in the vicinity of a discharge opening 16 of an air channel portion 19 of a housing 3. The stationary blades are disposed in the circumferential direction of the rotary shaft 8 at equidistant intervals. The number of the rotary blades is seven (7) and the number of the stationary blades 11 is eight (8).