CN100404813C - Shroud and blower using the same - Google Patents
Shroud and blower using the same Download PDFInfo
- Publication number
- CN100404813C CN100404813C CNB2005100875907A CN200510087590A CN100404813C CN 100404813 C CN100404813 C CN 100404813C CN B2005100875907 A CNB2005100875907 A CN B2005100875907A CN 200510087590 A CN200510087590 A CN 200510087590A CN 100404813 C CN100404813 C CN 100404813C
- Authority
- CN
- China
- Prior art keywords
- air
- annular portion
- gas flow
- fan
- flow adjusting
- 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
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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
Abstract
A shroud includes a ring portion (210) 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), enlarged from the ring portion (210) towards upstream in the airflow. The fan is located opposite to a heat exchanger (1) positioned upstream of the fan (100) in the airflow, and a center of the ring portion (210) is eccentric with respect to a center of the air introducing part (220). In the shroud, an airflow regulating plate (221) protrudes toward an upstream side of the airflow and forms a circular arc shape concentric with the ring portion (210) within a larger-area part (220a) of the air introducing part (220), which is formed due to the eccentrically located ring portion (210). Therefore, the first noise component of fan rotation noise can be effectively reduced without reducing an air amount passing through a heat exchanger.
Description
Technical field
The present invention relates to the axial blower of guard shield and this guard shield of use, for example they are suitable in the radiator of vehicle.More particularly, the present invention relates to have the guard shield of gas flow adjusting flange, it has reduced the noise that axial flow fan produces effectively.
Background technique
As the guard shield of the axial blower that is used for heat exchanger, a kind of guard shield has been described among the known JP-A-6-42498.In this guard shield, because the center of axial flow fan is provided with prejudicially with respect to heat exchanger, so, in the air of guard shield is introduced the part than the zonule of part, be provided with opening at the upstream side of axial flow fan.
As a rule, when the center of axial flow fan is eccentric with respect to heat exchanger, the Rotation Noise of axial flow fan, especially the noise in the first frequency scope (the first noise composition) becomes fairly obvious.In this guard shield, by introducing atmosphere from described opening, the pressure in the upstream portion of axial flow fan is introduced the less area part of part and the big area part balance that becomes at the air of guard shield.As a result, the Rotation Noise of the axial flow fan in the first and the 3rd frequency range (the first and the 3rd noise composition) can be reduced.
Yet, in this guard shield,, reduce so pass through the air quantity of heat exchanger because atmosphere is introduced by opening.Therefore, the performance of heat exchanger is lowered.
JP-A-6-42498 also proposes a kind of guard shield, and wherein gas flow adjusting flange is radially inwardly outstanding.This gas flow adjusting flange is installed in the air of guard shield and introduces in the less area part of part.This structure is effectively to the Rotation Noise (the second and the 4th noise composition) that reduces in the second and the 4th frequency range, is invalid to the Rotation Noise (the first noise composition) that reduces in the first frequency scope still.
Summary of the invention
Consider the problems referred to above, the purpose of this invention is to provide a kind of fan Rotation Noise (the first noise composition) that can reduce in the first frequency scope, and do not reduce the guard shield of the air quantity that flows to heat exchanger.Another object of the present invention provides a kind of blower that uses described guard shield.
According to the present invention, guard shield comprises annular portion, and it is around the radially outer edge of the axial flow fan of blow air, and air introducing part, is used for introducing air to annular portion.Fan is positioned at the opposite side of heat exchanger, and described heat exchanger is positioned at the upstream of fan airstream, and air introducing part is expanded towards the air-flow upstream from annular portion.In addition, the center of annular portion is eccentric with respect to the center of air introducing part.
In described guard shield, air is introduced part and is had big area part and zonule part, their formation is that part is eccentric to be provided with because annular portion is introduced with respect to air, and gas flow adjusting flange is arranged in the big area part, outstanding to the air-flow upstream side, it has the circular shape concentric with annular portion.Therefore, the gas flow adjusting flange limit air is introduced the wall flow of big area part partly to annular portion along air.Therefore, axial flow can be suppressed with the interference of the wall flow air of the big area part in edge.As a result, the fan Rotation Noise in the first frequency scope (the first noise composition) can be reduced.In the present invention, in air is introduced partly, opening is not set.Therefore, when this guard shield was used in the blower that is used for cooling heat exchanger, noise can be reduced effectively, and does not reduce the air quantity that flows to heat exchanger.
When the internal diameter of annular portion is set as D, when the length on the circumferencial direction of the gas flow adjusting flange of circular shape was set as L, L/D can be set as 0.34≤L/D≤0.44.In this case, the fan Rotation Noise can be further reduced.
In addition, when the internal diameter of annular portion is set as D, when the radius of curvature of the gas flow adjusting flange of circular shape was set as R, R/D can be set as 0.57≤R/D≤0.74.In addition, the outstanding length h of gas flow adjusting flange can be set in the scope of 7mm to 12mm.In this case, the fan Rotation Noise can be reduced effectively.
In the present invention, gas flow adjusting flange can be made of single plate, perhaps a plurality of gas flow adjusting flanges can be set, and concentric with annular portion (210).
Description of drawings
Other purpose of the present invention and advantage will become more apparent in the preferred embodiment detailed description with the accompanying drawing, wherein:
Figure 1A is the plan view that shows the axial blower structure, and Figure 1B is the schematic cross-section of Figure 1A;
Fig. 2 is the schematic cross-section that shows the functional effect of the gas flow adjusting flange in the axial blower;
Fig. 3 shows when radius of curvature R changes the plotted curve of the relation between fan Rotation Noise in the first frequency scope (the first noise composition) and the L/D in critical field;
Fig. 4 shows when outstanding length h changes the plotted curve of the relation between fan Rotation Noise in the first frequency scope (the first noise composition) and the L/D in critical field;
Fig. 5 is presented at the present invention to use in the state before, and fan Rotation Noise level (sound level) is with respect to the plotted curve of frequency; With
Fig. 6 is the schematic cross-section that shows the air stream of the axial blower that does not have gas flow adjusting flange.
Embodiment
Preferred implementation of the present invention will here be described with reference to the accompanying drawings.
In this embodiment, guard shield 200 of the present invention is used in the axial blower 10 (electric fan) of radiator (heat exchanger) 1.Axial blower 10 forms by assembling axial flow fan 100 and motor 300.Figure 1A and 1B show the structure of axial blower 10.
Axial blower 10 (hereinafter to be referred as blower 10) is fixed on the radiator 1 of vehicle motor one side by the installation elements 230 on 200 4 angles of guard shield.The core 1a of radiator 1 delivered to cool air by blower 10.Blower 10 is air-inlet type blowers 10, it with air from vehicle grille one side draught to motor one side, just, be drawn to axial flow fan 100 from the core 1a of radiator 1.
Axial flow fan 100 (hereinafter to be referred as fan) is to be made by the polypropylene that contains 20% glass fibre of having an appointment.Fan propeller boss 110 and blade 120 are made by injection moulding integral body.
Radially several blades 120 of Yan Shening (as being seven blades in the present embodiment) are arranged on the excircle of fan propeller boss 110.Here, the external diameter of fan 100 is set to 360mm.For the external diameter of fan 100,, be located at usually in the scope of 250mm to 400mm according to its vehicle assembling or required blowability.
Air introduce part 220 from annular portion 210 towards the air-flow upstream side (radiator 1 place one side) expand smoothly.The profile (profile) that air is introduced part 220 is a rectangle, with corresponding with the shape of the core 1a of radiator 1.Part 220 is introduced at the center of annular portion 210 with respect to air center is provided with (here prejudicially, it is located at the right part of Fig. 1 by off-centre), make that other parts that guard shield 200 is prevented from and is located in the vehicle disturb when guard shield 200 is mounted on the vehicle.
Because annular portion 210 is by arranged off-centre, air introduces that part 220 is divided into bigger regional 220a (left half of Figure 1A) and than zonule 220b (right half of Figure 1A).Shown in Figure 1B, gas flow adjusting flange 221 is arranged on air and introduces on this internal surface than big area part 220a of part 220.
Gas flow adjusting flange 221 is circular shapes, and is concentric with annular portion 210.Gas flow adjusting flange 221 is that thickness is the board member of 2mm, and outstanding to the air-flow upstream.For example, gas flow adjusting flange 221 can be introduced the big area part 220a formation one of part 220 with air.In this embodiment, gas flow adjusting flange 221 is divided into two parts, a top that is located at the Vertical direction of Figure 1A, and another is located at the below of the Vertical direction of Figure 1A.In order to be more readily understood following explanation, the size of gas flow adjusting flange 221 is specified like this: the length on the circumferencial direction is L, and radius of curvature 210 (from the center of annular portion 210 to the length of the periphery of gas flow adjusting flange 221) is R, and outstanding length is h.
Motor 300 is fixed on the motor supporting part of annular portion 210, and the axle 310 of motor 300 is inserted in the axle seam 112 of fan 100, makes motor 300 be fixed to fan 100.Here, motor 300 is known DC ferrite (ferrite) motor, and it is connected to the controller (not shown).Controller by change during the ON and during the OFF between ratio change average current value, electric current flows through motor 300 during this period.Corresponding with the cooling capacity that radiator 1 is required, throughput is to control by the rotating speed that changes the fan 100 that directly is connected on the controller.In the normal operating range of blower 10, rotating speed approximately is located at 1700rpm.
In above-mentioned blower 10, fan 100 rotates by motor 100 operations, and the air that it will be used to cool off is sent to the core 1a of radiator 1, thereby the thermal radiation of the cooling water of radiator 1 is promoted.
The off-centre of the annular portion 210 of guard shield 200 is provided with to be introduced part 220 with air and is divided into big area part 220a and less area part 220b.Fig. 5 has shown under the state that gas flow adjusting flange 221 is not set, the affirmation result when blower 10 is connected on the radiator 1.As shown in Figure 5, the fan Rotation Noise in the first frequency scope of about 200Hz (the first noise composition) is more remarkable.The first noise composition is calculated as follows,
Just,
The zone.When this fan Rotation Noise was exaggerated when being transferred to vehicle, the fan Rotation Noise became a problem.Consider that the problems referred to above can take place, as shown in Figure 6,, introduce the air-flow and collide along the axial air-flow of the rotation of fan 100 (interference) of the big area part 220a of part 220 along air because in the zone of annular portion 210.
In the present invention, as shown in Figure 2, the wall that gas flow adjusting flange 221 limit air are introduced the big area part 220a of part 220 along air flows into annular portion 210.Therefore, the interference of air-flow can be lowered, thereby the Rotation Noise (the first noise composition) of fan in the first frequency scope can be lowered.
In Fig. 3, the length of the circumferencial direction of gas flow adjusting flange 221 is set as L, and the internal diameter of annular portion 210 is set as D, and the radius of curvature of gas flow adjusting flange 221 is set as R.Fan Rotation Noise in the first frequency scope (the first noise composition) is detected by changing R with respect to ratio L/D.Here, the outstanding length h of gas flow adjusting flange is 7mm.When L/D is in 0.34 to 0.44 the scope, can obtains enough noises and reduce effect, as shown in Figure 3.
About the radius of curvature R of gas flow adjusting flange 221, gas flow adjusting flange 221 can obtain better Rotation Noise more and reduce effect more near annular portion 210.When R is made as 211mm, obtain the maximum reduction of noise, approximately 4.5dB.Even R reaches 271mm and also can obtain this effect.When the ratio R/D with regard to radius of curvature R and annular portion 210 inside diameter D considers this effect, when R/D is in 0.57 to 0.74 scope, can obtain enough effects.
In addition, as shown in Figure 4, (R=231mm when 251mm) changing, is collided with the air-flow that flows into annular portion 210 and the interference that causes is suppressed by the air-flow of the big area part 220a that introduces part 220 along air from 7mm to 12mm as outstanding length h.As a result, noise can reduce (Δ 2.5 is to Δ 4dB) greatly.
In the present invention, introduce in the part 220, do not reduce so pass through the air quantity of the core 1a of radiator 1 because there is opening to be located at air.
(other preferred embodiment)
In the embodiment of foregoing description, gas flow adjusting flange 221 is interpreted as introducing the gas flow adjusting flange that the big area part 220a of part 220 is wholely set with air.Yet gas flow adjusting flange 221 can also be independent of air to be introduced part 220 and forms, can to introduce part 220 integrally formed with air.
The profile that air is introduced part 220 is not limited only to rectangle, can also make other shape into as circular or oval.
Gas flow adjusting flange 221 not necessarily is divided into two parts, and can also be formed by single plate, or be formed by a plurality of parts more than two parts.
Fan 100 is used for the electric blower 10 that rotated by motor 300.Yet the engine blower that is rotated by the driving force of vehicle motor also can use.
The foregoing description has been explained and has been used for supplying the fan 100 of air to radiator 1.Yet fan 100 can be to use the object in other heat exchanger, as be used for the condensation air-conditioning refrigerant condenser, be used for the oil cooler of cold oil, or be used for cooling off the intercooler (interstage cooler) that sucks air.
This changes and improvements will be understood to be within the scope of the present invention that claims define.
Claims (10)
1. guard shield comprises:
Annular portion (210), it is around being used for the radially outer edge of axial flow fan (100) of blow air, and described fan (100) is positioned at the offside of heat exchanger (1), and described heat exchanger (1) is positioned at the upstream of the air-flow of fan (100), and
Air is introduced part (220), be used for air is introduced annular portion (210), described air is introduced part and is expanded towards the air-flow upstream from annular portion (210), wherein the center of annular portion (210) is eccentric with respect to the center of air introducing part (220), and described guard shield is characterised in that:
Air is introduced part (220) and is had big area part (220a) and zonule part (220b), and big area part (220a) and zonule part (220b) form owing to annular portion (210) is provided with prejudicially with respect to air introducing part (220); With
Gas flow adjusting flange (221), it is located on the big area part (220a), with outstanding, and has and the concentric circular shape of annular portion (210) towards the air-flow upstream side, wherein,
When the internal diameter of annular portion (210) is set as D, when the length on the circumferencial direction of the gas flow adjusting flange of circular shape (221) is set as L, 0.34≤L/D≤0.44.
2. guard shield according to claim 1 is characterized in that:
When the internal diameter of annular portion (210) is set as D, when the radius of curvature of the gas flow adjusting flange of circular shape (221) is set as R, 0.57≤R/D≤0.74.
3. guard shield according to claim 1 is characterized in that:
The outstanding length (h) of gas flow adjusting flange (221) is in the scope of 7mm to 12mm.
4. according to the described guard shield of arbitrary claim among the claim 1-3, it is characterized in that:
Gas flow adjusting flange (221) is single plate.
5. according to the described guard shield of arbitrary claim among the claim 1-3, it is characterized in that:
A plurality of gas flow adjusting flanges (221) and the concentric setting of annular portion (210).
6. blower comprises:
Be used for the axial flow fan (100) of blow air, described fan (100) is positioned at the offside of heat exchanger (1), and described heat exchanger (1) is positioned at the upstream of the air-flow of fan (100);
Guard shield (200), it comprises: annular portion (210), it is around the radially outer edge of axial flow fan (100); Introduce part (220) with air, be used for air is introduced annular portion (210), described air is introduced part and is expanded towards the air-flow upstream from annular portion (210), wherein the center of annular portion (210) is eccentric with respect to the center of air introducing part (220), and described guard shield is characterised in that:
Air is introduced part (220) and is had big area part (220a) and zonule part (220b), and big area part (220a) and zonule part (220b) form owing to annular portion (210) is provided with prejudicially with respect to air introducing part (220); With
Gas flow adjusting flange (221), it is located on the big area part (220a), with outstanding towards the air-flow upstream side, and has and the concentric circular shape of annular portion (210); Wherein
When the internal diameter of annular portion (210) is set as D, when the length on the circumferencial direction of the gas flow adjusting flange of circular shape (221) is set as L, 0.34≤L/D≤0.44.
7. blower according to claim 6 is characterized in that:
When the internal diameter of annular portion (210) is set as D, when the radius of curvature of the gas flow adjusting flange of circular shape (221) is set as R, 0.57≤R/D≤0.74.
8. according to the described blower of each claim among the claim 6-7, it is characterized in that:
The outstanding length (h) of gas flow adjusting flange (221) is in the scope of 7mm to 12mm.
9. according to each described blower among the claim 6-7, it is characterized in that: gas flow adjusting flange (221) is single plate.
10. according to the described blower of each claim among the claim 6-7, it is characterized in that: a plurality of gas flow adjusting flanges (221) are provided with one heart with annular portion (210).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004225830A JP4380454B2 (en) | 2004-08-02 | 2004-08-02 | Shroud |
| JP2004225830 | 2004-08-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1734071A CN1734071A (en) | 2006-02-15 |
| CN100404813C true CN100404813C (en) | 2008-07-23 |
Family
ID=35266869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100875907A Expired - Fee Related CN100404813C (en) | 2004-08-02 | 2005-07-28 | Shroud and blower using the same |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1624196B1 (en) |
| JP (1) | JP4380454B2 (en) |
| CN (1) | CN100404813C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105579713A (en) * | 2013-10-29 | 2016-05-11 | 株式会社电装 | Air-blowing device |
Families Citing this family (9)
| 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 |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5024267A (en) * | 1989-06-28 | 1991-06-18 | Aisin Kako Kabushiki Kaisha | Cooling apparatus for heat exchanger |
| JP2001254698A (en) * | 2000-03-10 | 2001-09-21 | Maruyama Mfg Co Ltd | Centrifugal air blower and portable working machine |
| US20020076323A1 (en) * | 2000-12-15 | 2002-06-20 | Matsushita Electric Industrial Co., Ltd. | Air blower |
| CN2526566Y (en) * | 2002-01-07 | 2002-12-18 | 九德松益股份有限公司 | Low-noise fan |
| US20040009062A1 (en) * | 2002-07-15 | 2004-01-15 | Kyungseok Cho | Fan shroud assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56162469U (en) * | 1980-04-30 | 1981-12-03 | ||
| JP4191431B2 (en) * | 2002-05-27 | 2008-12-03 | 三菱重工業株式会社 | cooling fan |
-
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
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5024267A (en) * | 1989-06-28 | 1991-06-18 | Aisin Kako Kabushiki Kaisha | Cooling apparatus for heat exchanger |
| JP2001254698A (en) * | 2000-03-10 | 2001-09-21 | Maruyama Mfg Co Ltd | Centrifugal air blower and portable working machine |
| US20020076323A1 (en) * | 2000-12-15 | 2002-06-20 | Matsushita Electric Industrial Co., Ltd. | Air blower |
| CN2526566Y (en) * | 2002-01-07 | 2002-12-18 | 九德松益股份有限公司 | Low-noise fan |
| US20040009062A1 (en) * | 2002-07-15 | 2004-01-15 | Kyungseok Cho | Fan shroud assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105579713A (en) * | 2013-10-29 | 2016-05-11 | 株式会社电装 | Air-blowing device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1624196A2 (en) | 2006-02-08 |
| EP1624196A3 (en) | 2012-08-08 |
| CN1734071A (en) | 2006-02-15 |
| EP1624196B1 (en) | 2014-03-26 |
| JP2006046113A (en) | 2006-02-16 |
| JP4380454B2 (en) | 2009-12-09 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20200728 |
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| CF01 | Termination of patent right due to non-payment of annual fee |