EP1624196B1 - Shroud and blower using the same - Google Patents
Shroud and blower using the same Download PDFInfo
- Publication number
- EP1624196B1 EP1624196B1 EP05015433.5A EP05015433A EP1624196B1 EP 1624196 B1 EP1624196 B1 EP 1624196B1 EP 05015433 A EP05015433 A EP 05015433A EP 1624196 B1 EP1624196 B1 EP 1624196B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring portion
- fan
- airflow
- regulating plate
- shroud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Definitions
- the present invention relates to a shroud and an axial flow blower using the same, which are suitably used for a radiator of a vehicle, for example. More specifically, the present invention relates to a shroud having an airflow regulating plate, which effectively reduces rotation noise caused by an axial flow fan.
- IP 2003 343394 A discloses an airflow regulating plate 19 which is provided on both sides of a ring portion 16 in a light-left direction which regulating plate has a circular-arc shape extending continuously from the top end to the bottom end of the shroud.
- JP 56 162 469 U3 shows a center of a ring portion in an eccentric position with respect to the center of the shroud.
- JP-A-6-42498 further proposed a shroud in which an airflow regulating plate projects radially towards the inside.
- This airflow regulating plate is installed in the smaller-area part of the air introducing part of the shroud.
- This structure is effective for decreasing the rotational noise in the second and fourth frequency ranges (the second and the fourth noise components), but is not effective for decreasing the rotation noise in the first frequency range (the first noise component).
- a shroud includes a ring portion (210) for surrounding a radial outer rim of an axial flow fan (100) for blowing air, and an air introducing part (220) for introducing air to the ring portion (210).
- the fan (100) is located opposite to a heat exchanger (1) positioned upstream of the fan (100) in an airflow, and the air introducing part (220) is enlarged from the ring portion (210) towards upstream in the airflow.
- a center of the ring portion (210) is eccentric with respect to a center of the air introducing part (220).
- the air introducing part (220) has a large-area part (220a) and a small-area part (220b) which are formed due to the eccentrically located ring portion (210) with respect to the air introducing part (220), and an airflow regulating plate (221) is provided on the large-area part (220a) to project toward an upstream side of the airflow and has a circular-arc shape concentric with the ring portion (210). Accordingly, the airflow regulating plate (221) restricts the air from flowing to the ring portion along the wall surface of the larger-area part (220a) of the air introducing part (220). Therefore, an interference of an axial airflow with the air flowing along the wall surface of the larger-area part can be suppressed.
- the fan rotation noise in the first frequency range (the first noise component) can be reduced.
- no opening is provided in the air introducing part (220). Therefore, when this shroud is used for a blower for cooling a heat exchanger, the noise can be effectively reduced without reducing the amount of air flowing towards the heat exchanger.
- L / D can be set such that 0.34 ⁇ L / D ⁇ 0.44. In this case, the fan rotation noise can be further reduced.
- R / D can be set such that 0.57 ⁇ R / D ⁇ 0.74.
- a projecting length (h) of the airflow regulating plate (221) can be set within a range of 7 mm and 12 mm. In this case, the fan rotation noise can be effectively reduced.
- a plurality of the airflow regulating plates (221) are arranged to be concentric with the ring portion (210).
- a shroud 200 of the present invention is used for an axial flow blower 10 (an electric fan) for a radiator 1 (heat exchanger).
- the axial flow blower 10 is formed by assembling an axial flow fan 100 and a motor 300.
- Figs. 1A and 1B show the structure of the axial flow blower 10.
- the axial flow blower 10 (hereinafter blower 10) is fixed to the radiator 1 for a vehicle at an engine side with mounting members 230 provided at four corners of the shroud 200.
- the blower 10 sends cool air to a core portion la of the radiator 1.
- the blower 10 is an air-intake type blower 10, which draws air from the side of a vehicle grill to the engine side, that is, from the core portion 1a of the radiator 1 to the axial flow fan 100.
- the axial flow fan 100 (hereinafter fan) is made of polypropylene containing about 20% of glass fiber.
- a fan boss 110 and blades 120 are integrally formed by an injection molding.
- the fan boss 110 is cylindrical-shaped with one closed end.
- a metal insert 111 made of aluminum is insert-formed at the center area of the closed end of the fan boss 110. Further, a shaft slit 112 for receiving a shaft 310 of the motor 300 is provided at the center of the metal insert 111.
- the outer diameter of the fan 100 is set at 360mm. As to the outer diameter of the fan 100, it is generally set in a range between 250mm and 400mm in accordance with its mountability to the vehicle or required air blowing capabilities.
- the shroud 200 is made of polypropylene containing about 25% to 30% of glass fiber and is integrally formed with a ring portion 210, an air introducing part 220, the mounting portions 230, etc.
- the ring portion 210 is provided for surrounding the radial outer rim of the fan 100.
- a motor supporting portion (not shown) for supporting the motor 300 is provided downstream of the ring portion 210 in the airflow, at the inner diameter side of the ring portion 210.
- a clearance (e.g., 4mm) is ensured between the fan 100 and the ring portion 210 so as to prevent interference therebetween.
- the inner diameter D of the ring portion 210 is set at 368mm, as an example.
- the air introducing part 220 is enlarged smoothly from the ring portion 210 towards the upstream side of the airflow (to the side of the radiator 1).
- the outline (the outer shape) of the air introducing part 220 is rectangular-shaped to correspond to the shape of the core portion 1a of the radiator 1.
- the center of the ring portion 210 is eccentrically arranged (here, it is eccentrically arranged at the right part in Fig. 1 ) with respect to the center of the air introducing part 220, so that the shroud 200 is prevented from interfering with other parts provided in the vehicle when it is mounted to the vehicle.
- the air introducing part 220 is divided into a larger-area part 220a (the left part in Fig. 1A ) and a smaller-area part 220b (the right part in Fig. 1A ), due to the eccentric arrangement of the ring portion 210.
- the airflow regulating plate 221 is provided on an inner surface of this larger-area part 220a of the air introducing part 220.
- the airflow regulating plate 221 is circular-arc shaped to be concentric with the ring portion 210.
- the airflow regulating plate 221 is a plate member having a thickness of 2mm and projects towards upstream in the airflow.
- the airflow regulating plate 221 can be integrally formed with the larger-area part 220a of the air introducing part 220.
- the airflow regulating plate 221 is divided into two parts, one is provided upper and the other is provided below in the vertical direction of Fig. 1A .
- the dimensions of the airflow regulating plate 221 are indicated such that, a length in the circumferential direction is as L , a curvature radius (a length from the center of the ring portion 210 to the outer periphery of the airflow regulating plate 221) is as R and a projecting length is as h .
- the motor 300 is fixed to the motor supporting portion of the ring portion 210, and shaft 310 of the motor 300 is inserted into the shaft slit 112 of the fan 100 so that the motor 300 is fixed to the fan 100.
- the motor 300 is a generally known DC ferrite motor and is connected to a controller (not shown).
- the controller varies an average current value by changing a ratio between ON period and OFF period during which the current is running through the motor 300.
- an amount of airflow is controlled by varying the rotational speed of the fan 100 which is directly connected to the controller. In the normal use range of the blower 10, the rotational speed is set approximately at 1700 rpm.
- the fan 100 is rotated by the function of the motor 300 and sends air for cooling towards the core part 1a of the radiator 1 thereby heat radiation from the cooling water of the radiator 1 is promoted.
- Fig. 5 shows a confirmation result when the blower 10 is attached to the radiator 1 in a state in which the airflow regulating plate 221 is not provided.
- the fan rotation noise in the first frequency range of approximately 200 Hz (first noise component) occurs noticeably.
- the first noise component is calculated such that, rotational frequency (28 Hz) of the fan 100 X blade numbers (7) ⁇ the first noise component (200Hz region). That is, 28 Hz X 7 ⁇ 200Hz region.
- This fan rotation noise becomes a problem when amplified at the time of being transmitted to the vehicle.
- the airflow regulating plate 221 restricts the air from flowing along the wall surface of the larger-area part 220a of the air introducing part 220 into the ring portion 210. Therefore, the interference in the airflow can be reduced thereby the fan rotation noise in the first frequency range (the first noise component) can be reduced.
- the length in the circumferential direction of the airflow regulating plate 221 is set as L
- the inner diameter of the ring portion 210 is set as D
- the curvature radius of the airflow regulating plate 221 is set as R .
- the fan rotation noise in the first frequency range has been examined by varying R with respect to a ratio L / D .
- a projecting length h of the airflow regulating plate is 7mm. A sufficient noise reduction effect is obtained when L / D is within the range of 0.34 and 0.44, as shown in Fig. 3 .
- the curvature radius R of the airflow regulating plate 221 As to the curvature radius R of the airflow regulating plate 221, the closer the airflow regulating plate 221 is to the ring portion 210, the better effect in the reduction of the rotation noise is obtained.
- R is set at 211mm, the maximum reduction in the noise, which is around 4.5 dB, is obtained. This effect is obtained even R up to 271mm.
- this effect is considered in view of the ratio ( R / D ) of the curvature radius R to the inner diameter D of the ring portion 210, the sufficient effect can be obtained when R / D is within the range of 0.57 and 0.74.
- the airflow regulating plate 221 is explained as the one integrally provided with the larger-area part 220a of the air introducing part 220.
- the airflow regulating plate 221 also can be formed independently from the air introducing part 220, and can be integrated with the air introducing part 220.
- the outline shape of the air introducing part 220 is not limited to rectangular, but can be modified to other shapes such as circular or elliptical shape.
- the airflow regulating plate 221 can be formed by plural parts more than two.
- the fan 100 is used for the electric blower 10 rotated by the motor 300.
- an engine fan rotated by driving force of a vehicular engine can be also used.
- the fan 100 for supplying air to the radiator 1.
- the fan 100 can be a subject for use in other heat exchangers such as a condenser for condensing refrigerant of an air-conditioner, an oil cooler for cooling oil or an intercooler for cooling drawn air.
Description
- The present invention relates to a shroud and an axial flow blower using the same, which are suitably used for a radiator of a vehicle, for example.. More specifically, the present invention relates to a shroud having an airflow regulating plate, which effectively reduces rotation noise caused by an axial flow fan.
-
IP 2003 343394 A -
JP 56 162 469 U3 - As a shroud of an axial flow blower used for a heat exchanger, the one described in
JP-A-6-42498 - Normally, when the center of the axial flow fan is eccentric with respect to the heat exchanger, rotation noise of the axial flow fan, especially in a first frequency range (a first noise component) becomes obvious. In this kind of shroud, by introducing atmosphere from the opening, pressures in the upstream part of the axial flow fan become balanced at the smaller-area and larger-area parts of the shroud air introducing part As a result, the rotation noise of the axial flow fan in the first and the third frequency ranges (the first and the third noise components) can be reduced.
- In this shroud, however, because the atmosphere is introduced through the opening, the amount of air passing through the heat exchanger decreases. Therefore, the performance of the heat exchanger worsens.
-
JP-A-6-42498 - In view of the foregoing problem, it is an object of the present invention to provide a shroud which enables to reduce the fan rotation noise in the first frequency range (the first noise component) without decreasing the air amount flowing to the heat exchanger. It is another object of the present invention to provide a blower using the shroud.
- This object is achieved by the features in
claim 1. - According to the present invention, a shroud includes a ring portion (210) for surrounding a radial outer rim of an axial flow fan (100) for blowing air, and an air introducing part (220) for introducing air to the ring portion (210). The fan (100) is located opposite to a heat exchanger (1) positioned upstream of the fan (100) in an airflow, and the air introducing part (220) is enlarged from the ring portion (210) towards upstream in the airflow. Furthermore, a center of the ring portion (210) is eccentric with respect to a center of the air introducing part (220).
- In the shroud, the air introducing part (220) has a large-area part (220a) and a small-area part (220b) which are formed due to the eccentrically located ring portion (210) with respect to the air introducing part (220), and an airflow regulating plate (221) is provided on the large-area part (220a) to project toward an upstream side of the airflow and has a circular-arc shape concentric with the ring portion (210). Accordingly, the airflow regulating plate (221) restricts the air from flowing to the ring portion along the wall surface of the larger-area part (220a) of the air introducing part (220). Therefore, an interference of an axial airflow with the air flowing along the wall surface of the larger-area part can be suppressed. As a result, the fan rotation noise in the first frequency range (the first noise component) can be reduced. In the present invention, no opening is provided in the air introducing part (220). Therefore, when this shroud is used for a blower for cooling a heat exchanger, the noise can be effectively reduced without reducing the amount of air flowing towards the heat exchanger.
- When an inner diameter of the ring portion (210) is set as D and a length in a circumferential direction of the circular-arc shaped airflow regulating plate (221) is set as L, L/D can be set such that 0.34 ≦ L/D ≦ 0.44. In this case, the fan rotation noise can be further reduced.
- Further, when an inner diameter of the ring portion (210) is set as D and a curvature radius of the circular-arc shaped airflow regulating plate (221) is set as R, R/D can be set such that 0.57 ≦ R/D ≦ 0.74. Furthermore, a projecting length (h) of the airflow regulating plate (221) can be set within a range of 7 mm and 12 mm. In this case, the fan rotation noise can be effectively reduced.
- In the present invention, a plurality of the airflow regulating plates (221) are arranged to be concentric with the ring portion (210).
- Additional objects and advantages of the present invention will be more readily apparent from the following detailed description of preferred embodiments when taken together with the accompanying drawings, in which:
-
Fig. 1A is a front view showing a structure of an axial flow blower, andFig. 1B is a schematic sectional view ofFig. 1A ; -
Fig. 2 is a schematic sectional view showing a functional effect of an airflow regulating plate in the axial flow blower; -
Fig. 3 is a graph showing the relationship between fan rotation noise in a first frequency range (a first noise component) and L/D, when a curvature radius R is changed within a standard range; -
Fig. 4 is a graph showing the relationship between fan rotation noise in the first frequency range (first noise component) and L/D, when a projecting length h is changed within a standard range; -
Fig. 5 is a graph showing the fan rotation noise level (sound level) with respect to a frequency in a state before the present invention is applied; and -
Fig. 6 is a schematic sectional view showing an air flow in an axial flow blower without an airflow regulating plate. - A preferred embodiment of the present invention will be described hereinafter with reference to the appended drawings.
- In this embodiment, a
shroud 200 of the present invention is used for an axial flow blower 10 (an electric fan) for a radiator 1 (heat exchanger). Theaxial flow blower 10 is formed by assembling anaxial flow fan 100 and amotor 300.Figs. 1A and 1B show the structure of theaxial flow blower 10. - The axial flow blower 10 (hereinafter blower 10) is fixed to the
radiator 1 for a vehicle at an engine side with mountingmembers 230 provided at four corners of theshroud 200. Theblower 10 sends cool air to a core portion la of theradiator 1. Theblower 10 is an air-intake type blower 10, which draws air from the side of a vehicle grill to the engine side, that is, from thecore portion 1a of theradiator 1 to theaxial flow fan 100. - The axial flow fan 100 (hereinafter fan) is made of polypropylene containing about 20% of glass fiber. A
fan boss 110 andblades 120 are integrally formed by an injection molding. - The
fan boss 110 is cylindrical-shaped with one closed end. Ametal insert 111 made of aluminum is insert-formed at the center area of the closed end of thefan boss 110. Further, a shaft slit 112 for receiving ashaft 310 of themotor 300 is provided at the center of themetal insert 111. - Several blades 120 (e.g., seven blades, in this embodiment) extending radially are provided on the outer circumference of the
fan boss 110. Here, the outer diameter of thefan 100 is set at 360mm. As to the outer diameter of thefan 100, it is generally set in a range between 250mm and 400mm in accordance with its mountability to the vehicle or required air blowing capabilities. - The
shroud 200 is made of polypropylene containing about 25% to 30% of glass fiber and is integrally formed with aring portion 210, an air introducing part 220, the mountingportions 230, etc. - The
ring portion 210 is provided for surrounding the radial outer rim of thefan 100. A motor supporting portion (not shown) for supporting themotor 300 is provided downstream of thering portion 210 in the airflow, at the inner diameter side of thering portion 210. A clearance (e.g., 4mm) is ensured between thefan 100 and thering portion 210 so as to prevent interference therebetween. In this embodiment, the inner diameter D of thering portion 210 is set at 368mm, as an example. - The air introducing part 220 is enlarged smoothly from the
ring portion 210 towards the upstream side of the airflow (to the side of the radiator 1). The outline (the outer shape) of the air introducing part 220 is rectangular-shaped to correspond to the shape of thecore portion 1a of theradiator 1. The center of thering portion 210 is eccentrically arranged (here, it is eccentrically arranged at the right part inFig. 1 ) with respect to the center of the air introducing part 220, so that theshroud 200 is prevented from interfering with other parts provided in the vehicle when it is mounted to the vehicle. - The air introducing part 220 is divided into a larger-area part 220a (the left part in
Fig. 1A ) and a smaller-area part 220b (the right part inFig. 1A ), due to the eccentric arrangement of thering portion 210. As shown inFig. 1B , theairflow regulating plate 221 is provided on an inner surface of this larger-area part 220a of the air introducing part 220. - The
airflow regulating plate 221 is circular-arc shaped to be concentric with thering portion 210. Theairflow regulating plate 221 is a plate member having a thickness of 2mm and projects towards upstream in the airflow. For example, theairflow regulating plate 221 can be integrally formed with the larger-area part 220a of the air introducing part 220. In this embodiment, theairflow regulating plate 221 is divided into two parts, one is provided upper and the other is provided below in the vertical direction ofFig. 1A . For easier understanding of the explanations to follow, the dimensions of theairflow regulating plate 221 are indicated such that, a length in the circumferential direction is as L, a curvature radius (a length from the center of thering portion 210 to the outer periphery of the airflow regulating plate 221) is as R and a projecting length is as h. - The
motor 300 is fixed to the motor supporting portion of thering portion 210, andshaft 310 of themotor 300 is inserted into the shaft slit 112 of thefan 100 so that themotor 300 is fixed to thefan 100. Here, themotor 300 is a generally known DC ferrite motor and is connected to a controller (not shown). The controller varies an average current value by changing a ratio between ON period and OFF period during which the current is running through themotor 300. In accordance with the required cooling capability of theradiator 1, an amount of airflow is controlled by varying the rotational speed of thefan 100 which is directly connected to the controller. In the normal use range of theblower 10, the rotational speed is set approximately at 1700 rpm. - In the
blower 10 structured as described, thefan 100 is rotated by the function of themotor 300 and sends air for cooling towards thecore part 1a of theradiator 1 thereby heat radiation from the cooling water of theradiator 1 is promoted. - The eccentricity of the
ring portion 210 of theshroud 200 divides the air introducing part 220 into the larger-area part 220a and the smaller-area part 220b.Fig. 5 shows a confirmation result when theblower 10 is attached to theradiator 1 in a state in which theairflow regulating plate 221 is not provided. As shown inFig. 5 , the fan rotation noise in the first frequency range of approximately 200 Hz (first noise component) occurs noticeably. The first noise component is calculated such that, rotational frequency (28 Hz) of the fan 100 X blade numbers (7) ≒ the first noise component (200Hz region). That is, 28 Hz X 7 ≒ 200Hz region. This fan rotation noise becomes a problem when amplified at the time of being transmitted to the vehicle. This is considered to happen, as shown inFig. 6 , because the airflow along the larger-area part 220a of the air introducing part 220 runs against (interferes) the airflow along the rotational axis direction of thefan 100 in the region of thering portion 210. - In the present invention, as shown in
Fig. 2 , theairflow regulating plate 221 restricts the air from flowing along the wall surface of the larger-area part 220a of the air introducing part 220 into thering portion 210. Therefore, the interference in the airflow can be reduced thereby the fan rotation noise in the first frequency range (the first noise component) can be reduced. - In
Fig. 3 , the length in the circumferential direction of theairflow regulating plate 221 is set as L, the inner diameter of thering portion 210 is set as D and the curvature radius of theairflow regulating plate 221 is set as R. The fan rotation noise in the first frequency range (the first noise component) has been examined by varying R with respect to a ratio L/D. Here, a projecting length h of the airflow regulating plate is 7mm. A sufficient noise reduction effect is obtained when L/D is within the range of 0.34 and 0.44, as shown inFig. 3 . - As to the curvature radius R of the
airflow regulating plate 221, the closer theairflow regulating plate 221 is to thering portion 210, the better effect in the reduction of the rotation noise is obtained. When R is set at 211mm, the maximum reduction in the noise, which is around 4.5 dB, is obtained. This effect is obtained even R up to 271mm. When this effect is considered in view of the ratio (R/D) of the curvature radius R to the inner diameter D of thering portion 210, the sufficient effect can be obtained when R/D is within the range of 0.57 and 0.74. - Also, as shown in
Fig. 4 , when the projecting length h is changed from 7mm to 12mm (R = 231mm, 251mm), the interference, caused by the airflow along the larger-area part 220a of the air introducing part 220 running against the airflow into thering portion 210, is suppressed. As a result, the noise can be greatly reduced (Δ2.5 to Δ4 dB). - In the present invention, since no opening is provided in the air introducing part 220, the air amount passing through the
core portion 1a of theradiator 1 is not decreased. - In the above-described embodiment, the
airflow regulating plate 221 is explained as the one integrally provided with the larger-area part 220a of the air introducing part 220. However, theairflow regulating plate 221 also can be formed independently from the air introducing part 220, and can be integrated with the air introducing part 220. - The outline shape of the air introducing part 220 is not limited to rectangular, but can be modified to other shapes such as circular or elliptical shape.
- The
airflow regulating plate 221 can be formed by plural parts more than two. - The
fan 100 is used for theelectric blower 10 rotated by themotor 300. However, an engine fan rotated by driving force of a vehicular engine can be also used. - The above embodiment has been explained with the
fan 100 for supplying air to theradiator 1. However, thefan 100 can be a subject for use in other heat exchangers such as a condenser for condensing refrigerant of an air-conditioner, an oil cooler for cooling oil or an intercooler for cooling drawn air. - Such changes and modifications are to be understood as being within the scope of the present invention as defined by the appended claims.
Claims (6)
- A shroud comprising:a ring portion (210) for surrounding a radial outer rim of an axial flow fan (100) for blowing air, the fan (100) being located opposite to a heat exchanger (1) positioned upstream of the fan (100) in an airflow; andan air introducing part (220), for introducing air to the ring portion (210), enlarged from the ring portion (210) towards upstream in the airflow, wherein a center of the ring portion (210) is eccentric with respect to a center of the air introducing part (220), the shroud characterized in that;the air introducing part (220) has a large-area part (220a) and a small-area part (220b) which are formed due to the eccentrically located ring portion (210) with respect to the air introducing part (220); andan airflow regulating plate (221) is provided on the large-area part (220a) to project toward an upstream side of the airflow, and has a plurality of divided parts each having a circular-arc shape concentric with the ring portion (210).
- A shroud according to claim 1, wherein:the center of the ring portion (210) is arranged eccentrically in a right-left direction with respect to the center of the air introducing part (220), andthe airflow regulating plate (221) is divided into two parts in a vertical direction perpendicular to the right-left direction.
- A shroud according to claim 1 or 2, wherein:when an inner diameter of the ring portion (210) is set as D and a length in a circumferential direction of the circular-arc shaped airflow regulating plate (221) is set as L, 0.34 ≦ L/D ≦0.44.
- A shroud according to any one of claims 1 to 3, wherein:when an inner diameter of the ring portion (210) is set as D and a curvature radius of the circular-arc shaped airflow regulating plate (221) is set as R, 0.57 ≦ R/D ≦ 0.74.
- A shroud according to any one of claims 1-4, wherein:a projecting length (h) of the airflow regulating plate (221) is within a range of 7 mm and 12 mm.
- A blower comprising:an axial flow fan (100) for blowing air, the fan (100) being located opposite to a heat exchanger (1) positioned upstream of the fan (100) in an airflow;a shroud according to any of claims 1 to 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004225830A JP4380454B2 (en) | 2004-08-02 | 2004-08-02 | Shroud |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1624196A2 EP1624196A2 (en) | 2006-02-08 |
EP1624196A3 EP1624196A3 (en) | 2012-08-08 |
EP1624196B1 true EP1624196B1 (en) | 2014-03-26 |
Family
ID=35266869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05015433.5A Expired - Fee Related EP1624196B1 (en) | 2004-08-02 | 2005-07-15 | Shroud and blower using the same |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1624196B1 (en) |
JP (1) | JP4380454B2 (en) |
CN (1) | CN100404813C (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090220334A1 (en) * | 2008-02-28 | 2009-09-03 | Spx Cooling Technologies, Inc. | Fan shroud for heat exchange tower fans |
JP2010169007A (en) * | 2009-01-23 | 2010-08-05 | Calsonic Kansei Corp | Fan shroud structure |
JP5868294B2 (en) * | 2012-09-03 | 2016-02-24 | シャープ株式会社 | Hair dryer |
JP5965296B2 (en) * | 2012-11-22 | 2016-08-03 | 株式会社豊田自動織機 | Cooling fan device for vehicle |
JP6126421B2 (en) * | 2013-03-21 | 2017-05-10 | 三菱重工オートモーティブサーマルシステムズ株式会社 | Motor fan |
JP6156061B2 (en) * | 2013-10-29 | 2017-07-05 | 株式会社デンソー | Blower |
FR3023870B1 (en) * | 2014-07-15 | 2016-07-29 | Peugeot Citroen Automobiles Sa | MOTOR FAN GROUP INCORPORATING A NOZZLE AND A THERMAL SCREEN |
JP6390348B2 (en) * | 2014-10-29 | 2018-09-19 | 株式会社デンソー | Blower |
CN104879319B (en) * | 2015-05-25 | 2017-01-18 | 广东美的环境电器制造有限公司 | Base for bladeless fan and bladeless fan |
WO2017212893A1 (en) * | 2016-06-09 | 2017-12-14 | 株式会社デンソー | Blowing device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56162469U (en) * | 1980-04-30 | 1981-12-03 | ||
JPH0755293Y2 (en) * | 1989-06-28 | 1995-12-20 | アイシン化工株式会社 | Cooling device for heat exchanger |
JP3741255B2 (en) * | 2000-03-10 | 2006-02-01 | 株式会社丸山製作所 | Centrifugal blower and portable work machine |
JP4442029B2 (en) * | 2000-12-15 | 2010-03-31 | パナソニック株式会社 | Blower |
CN2526566Y (en) * | 2002-01-07 | 2002-12-18 | 九德松益股份有限公司 | Low-noise fan |
JP4191431B2 (en) * | 2002-05-27 | 2008-12-03 | 三菱重工業株式会社 | cooling fan |
KR100848569B1 (en) * | 2002-07-15 | 2008-07-25 | 한라공조주식회사 | A fan shroud |
-
2004
- 2004-08-02 JP JP2004225830A patent/JP4380454B2/en not_active Expired - Fee Related
-
2005
- 2005-07-15 EP EP05015433.5A patent/EP1624196B1/en not_active Expired - Fee Related
- 2005-07-28 CN CNB2005100875907A patent/CN100404813C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1734071A (en) | 2006-02-15 |
EP1624196A2 (en) | 2006-02-08 |
JP4380454B2 (en) | 2009-12-09 |
JP2006046113A (en) | 2006-02-16 |
EP1624196A3 (en) | 2012-08-08 |
CN100404813C (en) | 2008-07-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1624196B1 (en) | Shroud and blower using the same | |
KR100400153B1 (en) | Centrifugal multiblade blower | |
EP2333347B1 (en) | Axial flow fan with hub isolation slots | |
EP0886046B1 (en) | Engine cooling apparatus | |
US6896478B2 (en) | Dual fan blower with axial expansion | |
EP1485624B1 (en) | Engine-cooling fan assembly with overlapping fans | |
EP0569863A1 (en) | Low axial profile, axial flow fan | |
US20050135947A1 (en) | Engine cooling fan motor with reduced water entry protection | |
US7114921B2 (en) | Fan and blower unit having the same | |
JP4618077B2 (en) | Cooling fan and blower | |
WO2017051521A1 (en) | Temperature conditioning unit, temperature conditioning system, and vehicle | |
US11951797B2 (en) | Cooling pack assembly | |
JPH11173605A (en) | Outdoor unit of air conditioner | |
CN112383174A (en) | Engine-driven generator and engine generator unit thereof | |
JPH05322200A (en) | Room unit of air conditioning apparatus and cross flow fan thereof | |
KR100669917B1 (en) | Assembly of fan and shroud | |
JP2003214658A (en) | Outdoor unit of air conditioner | |
KR20220078299A (en) | An outdoor unit of an air conditioner | |
KR20160090249A (en) | Fan Shroud for Motor Vehicle | |
EP2514942B1 (en) | Vehicle heat- exchange module | |
KR100748141B1 (en) | Assembly of fan and shroud | |
JPH0533797A (en) | Push-in type axial fan | |
US20240141920A1 (en) | Fan shroud assembly | |
KR100748142B1 (en) | Assembly of fan and shroud | |
CN117212912A (en) | Air conditioner outdoor unit and air conditioner |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F04D 29/54 20060101ALI20120704BHEP Ipc: F04D 29/66 20060101AFI20120704BHEP |
|
17P | Request for examination filed |
Effective date: 20121005 |
|
AKX | Designation fees paid |
Designated state(s): DE FR IT |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20131015 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR IT |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602005043065 Country of ref document: DE Effective date: 20140508 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 602005043065 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 602005043065 Country of ref document: DE Effective date: 20141110 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602005043065 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20150106 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602005043065 Country of ref document: DE Effective date: 20150106 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20170705 Year of fee payment: 13 Ref country code: FR Payment date: 20170724 Year of fee payment: 13 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180715 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20190719 Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602005043065 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210202 |