公开(公告)号：EP3889439A1

公开(公告)日：2021-10-06

申请号：EP19890168.8

申请日：2019-11-22

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka ,  FUNADA, Kazuya

IPC: F04D29/38

Abstract: An inner peripheral blade (15) is formed at an inner peripheral part of a blade of a propeller fan. A plurality of blade elements of the inner peripheral blade include a first blade element (15a) arranged on a front edge (12-F) side of the blade, and a second blade element (15b) arranged to be adjacent to the first blade element on a rear edge (12-R) side of the blade. On the blade surface part (12c), a first opening (16) passing through the blade surface part from a negative pressure side toward a positive pressure side is provided between the first blade element and the second blade element. When an apex projecting from a positive pressure surface (12p) of the first blade element is A, a distance from a center axis (O) to the apex A is r1, and a point having the distance r from the center axis on a front edge in a rotation direction of the first blade element is B, a chord length (W1) of the first blade element along a direction connecting the apex A with the point B, is equal to or larger than a chord length (W2) of the second blade element along a direction connecting an apex C with a point D when an apex projecting from a positive pressure surface of the second blade element is C, a distance from the center axis to the apex C is r2, and a point having the distance r2 from the center axis on a front edge in a rotation direction of the second blade element is D.

公开(公告)号：EP4317824A1

公开(公告)日：2024-02-07

申请号：EP22779874.1

申请日：2022-03-09

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka

IPC: F24F13/20 ,  F24F1/0073 ,  F04D17/04

Abstract: An air conditioning device includes a tangential fan (8), a columnar support (6), a heat exchanger (3) that is disposed between the columnar support (6) and the tangential fan (8), and a mechanism configured to rotate the tangential fan (8) around a rotation axis (16) and cause air to pass through the heat exchanger (3). At least some part of the columnar support (6) is placed along a straight line that is inclined with respect to the rotation axis (16).

公开(公告)号：EP3889440A1

公开(公告)日：2021-10-06

申请号：EP19890563.0

申请日：2019-11-22

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka ,  FUNADA, Kazuya

IPC: F04D29/38

Abstract: A propeller fan includes a hub (11) including a side surface around a center axis (O), and a plurality of blades disposed on the side surface of the hub. An inner peripheral blade extending from the side surface of the hub toward an outer edge is formed on a positive pressure surface (12p) of a blade surface part (12c) at an inner peripheral part of each of the blades. A plurality of blade elements of the inner peripheral blade include a first blade element (15a) arranged on a front edge side in a rotation direction of the blade, and a second blade element (15b) arranged to be adjacent to the first blade element on a rear edge side in the rotation direction of the blade. A first opening (16), which passes through the blade surface part from a negative pressure side toward a positive pressure side (P), is provided between the first blade element and the second blade element on the blade surface part. A space between an outer edge of the first blade element extended from the side surface toward an outer edge side of the blade, and an outer edge of the second blade element extended from the side surface toward the outer edge side of the blade on the positive pressure surface side, is opened from the side surface in a radial direction of the blade surface part, so that an air current coming from the negative pressure side toward the positive pressure side through the first opening, flows from the first opening toward the outer edge side of the blade along the positive pressure surface.

公开(公告)号：EP3889438A1

公开(公告)日：2021-10-06

申请号：EP19890036.7

申请日：2019-11-22

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka ,  FUNADA, Kazuya

IPC: F04D29/38

Abstract: A propeller fan includes a hub (11) including a side surface (11a) around a center axis (O), and a plurality of blades disposed on the side surface of the hub. An inner peripheral blade, which extends from the side surface of the hub toward an outer edge side, is formed on a positive pressure surface of a blade surface part at an inner peripheral part of each of the blades. The inner peripheral blade projects from the positive pressure surface of the blade surface part toward a positive pressure side, includes a front edge (15a-F) in a rotation direction (R) of the inner peripheral blade that is formed in a curved shape to be separated from a reference line (S1) toward the front edge side in the rotation direction of the blade, the reference line connecting a lower end (E3) positioned on the positive pressure surface at a base end of the inner peripheral blade connected to the side surface of the hub with an outer edge (E1) of the inner peripheral blade that is extended from the side surface toward an outer edge side of the blade and positioned on the positive pressure surface, and satisfies H/L ≥ 0.1, where L is a length of the reference line and H is a maximum value of a distance between the reference line and the front edge of the inner peripheral blade.

公开(公告)号：EP4317697A1

公开(公告)日：2024-02-07

申请号：EP22779776.8

申请日：2022-03-02

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka

IPC: F04D17/04

Abstract: A blower (1) includes a cross flow fan (8), a mechanism configured to rotate the cross flow fan (8) about a rotation axis (16), a front tongue part (14) that is arranged in front of the cross flow fan (8), and a back tongue part (15) that is arranged in back of the cross flow fan (8), wherein a front fan facing surface (54) of the front tongue part (14), the front fan facing surface (54) facing the cross flow fan (8), includes a plurality of front non-flat portions (58) on which non-flatness is formed, and a plurality of front flat portions (59) on which no non-flatness formed, a back fan facing surface (64) of the back tongue part (15), the back fan facing surface (64) facing the cross flow fan (8), includes a plurality of back non-flat portions (65) on which non-flatness formed, and a plurality of back flat portions (66) on which no non-flatness is formed, and the plurality of back non-flat portions (65) respectively face the plurality of front flat portions (59) and the plurality of back flat portions (66) respectively face the plurality of front non-flat portions (58).

公开(公告)号：EP3290715B1

公开(公告)日：2020-04-15

申请号：EP17184976.3

申请日：2017-08-04

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka

IPC: F04D29/38 ,  F04D29/68

公开(公告)号：EP3406912A1

公开(公告)日：2018-11-28

申请号：EP18160576.7

申请日：2018-03-07

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka ,  FUNADA, Kazuya

IPC: F04D29/32 ,  F04D29/38 ,  F04D29/66 ,  B64C11/16

CPC classification number: F04D29/325 ,  F04D29/38 ,  F04D29/384 ,  F04D29/388 ,  F04D29/661 ,  F05B2240/30

Abstract: A propeller fan includes: a hub having a side surface about a center axis; and a plurality of blades provided on the side surface of the hub. Each blade includes an inner peripheral portion positioned closer to a base portion of the each blade connected to the hub, and an outer peripheral portion positioned closer to an outer edge of the each blade. A ratio r/R between a radius r as a distance from the center axis to a boundary between the inner peripheral portion and the outer peripheral portion and a radius R as a distance from the center axis to the outer edge of each blade is equal to or lower than 0.4. A relational expression of V1

公开(公告)号：EP3290715A1

公开(公告)日：2018-03-07

申请号：EP17184976.3

申请日：2017-08-04

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka

IPC: F04D29/38 ,  F04D29/68

Abstract: An axial fan (5) includes: a hub; a plurality of blades (12) arranged in a circumferential direction of the hub (11); a cutout (18) in a rear edge part (17) of each of the plurality of blades, the cutout divides the rear edge part into an outer rear edge part (17A) and an inner rear edge part (17B); a first groove part (21) disposed in the outer rear edge part, the first groove part including a plurality of grooves extending toward the front edge part; and a second groove part (22) disposed in the inner rear edge part, the second groove part including a plurality of grooves extending toward the front edge part, the plurality of grooves of the first groove part and the plurality of grooves of the second groove part having different shapes when viewed in a rotational axis direction of the hub.

Abstract translation: 轴流式风扇（5）包括：轮毂; 沿所述轮毂（11）的圆周方向布置的多个叶片（12）; 在所述多个叶片中的每一个的后缘部分（17）中的切口（18），所述切口将所述后缘部分分成外后缘部分（17A）和内后缘部分（17B）; 设置在所述外后缘部中的第一槽部（21），所述第一槽部包括朝向所述前缘部延伸的多个槽; 和设置在所述内后缘部中的第二槽部（22），所述第二槽部包括朝向所述前缘部延伸的多个槽，所述第一槽部的所述多个槽和所述第二槽的多个槽 当在毂的旋转轴线方向上观察时具有不同形状的部分。

公开(公告)号：EP3376125A1

公开(公告)日：2018-09-19

申请号：EP18156790.0

申请日：2018-02-14

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka

IPC: F24F1/38 ,  F24F1/56

CPC classification number: F24F1/38 ,  F24F1/56 ,  F24F13/084 ,  F24F2221/16

Abstract: An outdoor unit of an air conditioner includes: a housing including a bottom surface, a side surface, and an upper surface; an outdoor heat exchanger arranged along the side surface of the housing; a blowing fan arranged on the upper surface of the housing; a bell mouth arranged around the blowing fan; a fan guard provided to cover an upper portion of the blowing fan; and a height changing member provided between the fan guard and the bell mouth and configured to change a height of the fan guard with respect to the blowing fan.

公开(公告)号：EP3299632A1

公开(公告)日：2018-03-28

申请号：EP17176027.5

申请日：2017-06-14

Applicant: Fujitsu General Limited

Inventor： SAWADA, Hirotaka

IPC: F04D29/38 ,  F04D29/68

CPC classification number: F24F1/06 ,  F04D29/181 ,  F04D29/325 ,  F04D29/38 ,  F04D29/384 ,  F04D29/388 ,  F04D29/4226 ,  F04D29/681 ,  F05D2240/126 ,  F05D2240/304 ,  F05D2300/43 ,  F24F7/007

Abstract: An axial fan (5) includes: a cutout (18) in a rear edge part of each of the plurality of blades, the rear edge part (17) being opposite to a front edge part (16) of the each of the plurality of blades in a rotational direction of the each of the plurality of blades, the cutout extending from the rear edge part toward the front edge part such that the cutout divides the rear edge part into an outer rear edge part (17A) and an inner rear edge part (17B); a rib (30a) in a blade surface (12a) of the each of the plurality of blades, the rib extending from the hub toward an outer circumference of the each of the plurality of blades along the front edge part (16); and a first thickness-reduced part (31) adjacent to an end of the rib (30a), the end of the rib being closer to the outer circumference, the each of the plurality of blades being thinned in the first thickness-reduced part.

Abstract translation: 一种轴流式风扇（5），其特征在于，在所述多个叶片的后端部具有切口（18），所述后端部（17）与所述多个叶片的各个叶片的前缘部（16） 在所述多个叶片中的每一个叶片的旋转方向上的叶片，所述切口从所述后边缘部分朝向所述前边缘部分延伸，使得所述切口将所述后边缘部分分成外后缘部分（17A）和内后缘部分 部分（17B）; 所述多个叶片中的每个叶片的叶片表面中的肋状物，所述肋状物沿着所述前缘部分从所述毂状物朝向所述多个叶片中的每个叶片的外周缘延伸; 以及与所述肋（30a）的一端相邻的第一减薄部分（31），所述肋的所述端部更靠近所述外周，所述多个刀片中的每一个在所述第一减厚部分中变薄。