IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0167990
(2002-06-10)
|
우선권정보 |
KR-0032757 (2001-06-12); KR-0032756 (2001-06-12) |
발명자
/ 주소 |
- Cho, Kyung Seok
- Min, Ok Ryul
- Park, Chang Ho
|
출원인 / 주소 |
- Halla Climate Control Corp.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
5 |
초록
▼
Disclosed is an axial flow fan capable of achieving reduction of noise while having a high blowing efficiency compared to the power consumption of a motor adapted to drive the axial flow fan. The axial flow fan includes a hub, and a plurality of blades extending radially around the hub. Each blade h
Disclosed is an axial flow fan capable of achieving reduction of noise while having a high blowing efficiency compared to the power consumption of a motor adapted to drive the axial flow fan. The axial flow fan includes a hub, and a plurality of blades extending radially around the hub. Each blade has a sweep angle varying gradually from a backward angle at a root of the blade connected to the hub to a forward angle at a tip of the blade, while having a flow dispersion region having a plurality of regions where the sweep angle is alternately changed, at a region defined between a backward sweep angle region at the root of the blade and a forward sweep angle region at the tip of the blade. Each blade has a longitudinal cross section curved to have a wave structure between the root of the blade and the tip of the blade. The axial flow fan may further include a fan band connecting tips of the blades. The axial flow fan achieves reduction of blowing noise by receiving air in a dispersed state at the leading edge of each blade, discharging air in a dispersed state at the trailing edge of each blade, and offsetting turbulent flows of air by virtue of the wave-shaped longitudinal cross-sectional structure of each blade.
대표청구항
▼
1. An axial flow fan including a hub, and a plurality of blades extending radially around the hub, wherein:each of the blades has a sweep angle varying gradually from a backward angle at a root of the blade connected to the hub to a forward angle at a tip of the blade; each of the blades has a flow
1. An axial flow fan including a hub, and a plurality of blades extending radially around the hub, wherein:each of the blades has a sweep angle varying gradually from a backward angle at a root of the blade connected to the hub to a forward angle at a tip of the blade; each of the blades has a flow dispersion region having a plurality of regions where the sweep angle is alternately changed, at a region defined between a backward sweep angle region at the root of the blade and a forward sweep angle region at the tip of the blade; and each of the blades has a leading edge extending from the root of the blade to the tip of the blade, and has a sweep angle varying gradually from a maximum backward angle at the root of the blade to a maximum forward angle at the tip of the blade while being alternately changed in direction at an intermediate portion of the leading edge from a backward direction, corresponding to a sweep direction at the root of the blade, to a forward direction, and then from the forward direction to the backward direction, so that the sweep angle is finally changed from the backward direction to the forward direction corresponding to a sweep direction at the tip of the blade. 2. The axial flow fan according to claim 1, wherein each of the blades has a trailing edge having the same sweep angle variation characteristics as those of the leading edge.3. The axial flow fan according to claim 1, further comprising:a fan band connecting tips of the blades. 4. The axial flow fan according to claim 1, wherein each of the blades has a width gradually increasing as the blade extends from its root to its tip.5. The axial flow fan according to claim 1, wherein each of the blades has a longitudinal cross section curved to have a wave structure between the root of the blade and the tip of the blade.6. The axial flow fan according to claim 1, wherein the absolute value of the forward sweep angle in the flow dispersion region on a mid-chord line between leading and trailing edges of the each of the blades corresponds to ⅔ or less of the absolute value of the backward sweep angle at the root of the blade.7. The axial flow fan according to claim 6, wherein the absolute value of the backward sweep angle in the flow dispersion region corresponds to ⅔ or less of the absolute value of the forward sweep angle at the tip of the blade.8. The axial flow fan according to claim 1, wherein the flow dispersion region of each of the blades is defined within a range of 0.15 to 0.75 of a non-dimensional radius expressed by the following expression: where “r” is a radial length from a center of the hub to an optional point on the blade, “Rh” is a radius of the hub, and “Rt” is a radial length from the center of the hub to the tip of the blade.9. An axial flow fan including a hub, and a plurality of blades extending radially around the hub, wherein:each of the blades has a sweep angle varying gradually from a forward angle at a root of the blade to a backward angle at a tip of the blade; and each of the blades has a flow dispersion region having a plurality of regions where the sweep angle is alternately changed, at a region defined between a forward sweep angle region at the root of the blade and a backward sweep angle region at the tip of the blade. 10. The axial flow fan according to claim 9, wherein each of the blades has a leading edge extending from the root of the blade to the tip of the blade, and has a sweep angle varying gradually from a maximum forward angle at the root of the blade to a maximum backward angle at the tip of the blade while being alternately changed in direction at an intermediate portion of the leading edge from a forward direction, corresponding to a sweep direction at the root of the blade, to a backward direction, and then from the backward direction to the forward direction, so that the sweep angle is finally changed from the forward direction to the backward direction corresponding to a sweep direction at the tip of the blade.11. An axial flow fan including a hub, and a plurality of blades extending radially around the hub, wherein:each of the blades has a sweep angle varying gradually from a backward angle at a root of the blade connected to the hub to a forward angle at a tip of the blade; each of the blades has a flow dispersion region having a plurality of regions where the sweep angle is alternately changed, at a region defined between a backward sweep angle region at the root of the blade and a forward sweep angle region at the tip of the blade; and each of the blades has a longitudinal cross section curved to have a wave structure between the root of the blade and the tip of the blade.
이 특허에 인용된 특허 (5)
-
Perosino Alessandro (Turin ITX), Axial fan, particularly for motor vehicles.
-
Patel ; Jay, Fan with noise reduction.
-
Capdevila Hugo,CAX, High efficiency, low solidity, low weight, axial flow fan.
-
Gray ; III Leslie M. (Lincoln MA), High strength fan.
-
Kondo Fumio (Nagoya JPX) Taniguchi Masami (Nagoya JPX) Hayashi Masateru (Aichi-ken JPX) Ito Akihiro (Aichi-ken JPX), Propeller fan.
이 특허를 인용한 특허 (6)
-
Stevens, William; Stairs, Robert W., Axial fan assembly.
-
Stevens, William; Stairs, Robert W., Axial fan assembly.
-
Cho,Kyungseok; Park,Seyoung, Axial-flow fan.
-
Cho,Kyungseok; Park,Seyoung; Park,Changho, Axial-flow fan.
-
Gervais, Marc; Gresle, Benoit; Finck, Sebastein; Sudre, Laurent, Blade for a helicopter anti-torque device.
-
Harvey, Neil W.; Bolger, John J., Compressor aerofoil.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.