CN102434471B - Cross-flow fan - Google Patents
Cross-flow fan Download PDFInfo
- Publication number
- CN102434471B CN102434471B CN201110340570.1A CN201110340570A CN102434471B CN 102434471 B CN102434471 B CN 102434471B CN 201110340570 A CN201110340570 A CN 201110340570A CN 102434471 B CN102434471 B CN 102434471B
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- CN
- China
- Prior art keywords
- impeller
- flow fan
- cross flow
- rotation
- side end
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- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Abstract
The invention provides a cross-flow fan, which reduces the NZ noise generated locally and especially reduces the NZ noise generated at the end portion. The cross-flow fan (1) comprises a first impeller (11A) arranged on the mounting end of the lateral end plate of a motor of the cross-flow fan; and a second impeller (11B) arranged through the first impeller (11A) and an end plate (13); and a third impeller (11C) arranged through the second impeller (11B) and the end plate (13). The lengths of the impellers along the rotating shafts thereof are respectively A, B and C, which satisfy the relationship of B<A<C.
Description
Technical field
The present invention relates to one and can reduce noise, the cross flow fan of particularly can reduction relevant to rotating speed and number of blade rotation sound (NZ sound), the cross flow fan particularly using in the indoor unit of air conditioner.
Background technique
With reference to Fig. 6, existing cross flow fan is described.In Fig. 6, cross flow fan 1 has multiple blades 11,12 and multiple end plate 13.In cross flow fan 1, make the relatively axial Central Symmetry configuration of multiple end plates 13, and the interval by end plate 13 between each is formed as at axial central part and two end part narrower than other parts, at the short blade 11 of this narrow apart section configuration length of blade, at the long long blade 12 of apart section configuration length of blade.
Patent documentation 1: Japan opens clear 64-41690 communique in fact
But above-mentioned existing cross flow fan is effectively for the NZ sound producing at the whole length range of fan, but the in the situation that of producing NZ sound in part, particularly for obtaining sufficient effect near the NZ sound producing axial end.Generally, loading in the air conditioner of cross flow fan, there is electric component at the motor side that makes fan rotation.Therefore in the end of cross flow fan of a side with motor, electric component, suck air-flow or blow out air turbulence, having impelled the generation of NZ sound.Like this, the NZ sound that existing cross flow fan produces for the part from fan is invalid.
Summary of the invention
The object of the invention is to solve above-mentioned problem, the cross flow fan that can reduce the rotation sound (NZ sound) that depends on rotating speed and the number of blade is provided.
In order to address the above problem, cross flow fan of the present invention has the first impeller, the second impeller and trilobed wheel successively from motor installation side end, the axial length of rotation of axial Length Ratio second impeller of rotation of the first impeller is long, shorter than the axial length of the rotation of trilobed wheel.
Cross flow fan of the present invention can reduce near the NZ sound from producing the end of fan.
Brief description of the drawings
Fig. 1 is the stereogram that is mounted with the indoor unit of the air conditioner of the cross flow fan of embodiments of the present invention 1.
Fig. 2 is the sectional view that is mounted with the indoor unit of the air conditioner of the cross flow fan of embodiments of the present invention 1.
Fig. 3 is the front elevation of the cross flow fan of embodiments of the present invention 1.
Fig. 4 is the front elevation of the cross flow fan of embodiments of the present invention 2.
Fig. 5 is the front elevation of the cross flow fan of embodiments of the present invention 3.
Fig. 6 is the front elevation of existing cross flow fan.
Reference character
1 cross flow fan
2 main bodys
3 suction ports
4 heat exchangers
5 blow-off outlets
6 ventilating paths
7 stabilizers
8 rear guides
Blade Shang Xia 9
10 left and right blades
11 impellers (blade)
11A the first impeller
11B the second impeller
11C trilobed wheel
13 end plates
13A motor installation side end plate
13B bearing side end panel
14 axle sleeves
15 axles
22 blades
Embodiment
The first invention is a kind of cross flow fan, it is provided with at multiple impellers near the position of periphery with multiple blades, and there is the motorized motor installation side end of peace and the bearing side end at the other end of motor installation side end, in this cross flow fan, be disposed with the first impeller, the second impeller and trilobed wheel from motor installation side end, the axial length of rotation of axial Length Ratio second impeller of rotation of the first impeller is long, and shorter than the axial length of rotation of trilobed wheel.
Thus, the second impeller changes the generation direction of sound, and the first impeller raises pressure, and trilobed wheel improves wind pushing performance, can not reduce wind pushing performance thus and be reduced in the local NZ sound producing in end.
The second invention is in the first invention, and the axial length of rotation of the impeller between trilobed wheel and bearing side end is identical with the axial length of rotation of the second impeller or trilobed wheel.
Thus, can reduce NZ sound, and be the length identical with the longest trilobed wheel by making remaining impeller, can give full play to the wind pushing performance as fan.Or, be the length identical with the second the shortest impeller by making remaining impeller, can make intensity and rigidity reinforced as fan, reduce quiet deflection.In addition can sharing die, can boost productivity.
The 3rd invention is in the first invention, between trilobed wheel and bearing side end, and the impeller that alternately the axial length of configuration rotation is identical with the second impeller and the axial length of the rotation impeller identical with trilobed wheel.
Thus, further form different wind speed profile, the sound intensity (Sound Intensity) of generation is different respectively, therefore can relax the NZ sound producing with certain frequency.
Use brief description of the drawings embodiments of the present invention below.
(mode of execution 1)
Fig. 1 is the stereogram with the indoor unit of the air conditioner of the cross flow fan of embodiments of the present invention 1, and Fig. 2 is the sectional view in the I-I cross section representing in Fig. 1 of this indoor unit.In Fig. 1, the main body 2 of the indoor unit of air conditioner is provided with at the suction port 3 of front surface or upper surface setting and the blow-off outlet 5 arranging in lower surface front.In Fig. 2, in the inside of main body 2, be provided with the heat exchanger 4 that is roughly inverted v-shaped, and large to the cross flow fan 1 configuring between the shape of inverted v-shaped at heat exchanger 4.
Ventilating path 6 from cross flow fan 1 to blow-off outlet 5 comprises: the part in the front side that approaches cross flow fan 1 is extended the stabilizer 7 arranging along running shaft direction; The upper wall that upside from stabilizer 7 to blow-off outlet 5 forms; Guide 8 from the rear side of cross flow fan 1 to 5 one-tenth lower wall of blow-off outlet; Sidewall with left and right.In addition, be provided with cross section in the downstream side of ventilating path 6 and be circular-arc, the above-below direction of controlling blow out air roughly towards blade up and down 9, and control blow out air left and right directions towards left and right blade 10.
Utilize motor (not shown) that cross flow fan 1 is rotated, flow into main body 2 from the air of the interior space via suction port 3 thus.And then undertaken flowing into cross flow fan 1 after heat exchange by heat exchanger 4.The air flowing out from cross flow fan 1 via comprise stabilizer 7 and the ventilating path 6 of guide 8 etc., blow out to the interior space from blow-off outlet 5.Now, utilize control above-below direction towards blade up and down 9 and control left and right directions towards left and right blade 10, carry out the direction control of air-flow.
Fig. 3 is the front elevation of the cross flow fan of embodiments of the present invention 1.Cross flow fan 1 is by utilizing abreast support board (end plate) 13 in conjunction with forming at axle direction in multiple impellers (blade) 11.Each impeller (blade) 11 near periphery be provided with the multiple blades 22 parallel with running shaft.End (right-hand end of Fig. 3) a side of cross flow fan 1 is provided with motor installation side end plate 13A, this motor installation side end plate 13A has the axle sleeve 14 as the hole for connecting motor (not shown) axle, be provided with bearing side end panel 13B at the other end (left end of Fig. 3), this bearing side end panel 13B has the axle 15 of the bearing (not shown) of the sidewall setting that is inserted in ventilating path 6.Below using the end of a side that is provided with motor installation side end plate 13A as motor installation side end, the end of a side that is provided with bearing side end panel 13B is described as bearing side end.
The trilobed wheel 11C that be arranged in the first impeller 11A of the motor installation side end plate 13A side of cross flow fan 1, the second impeller 11B arranging by the first impeller 11A and end plate 13, arranges by the second impeller 11B and end plate 13, forms the length difference of their blade 22.And the length of the blade 22 of formation the first impeller 11A is greater than the length of the blade 22 that forms the second impeller 11B and is less than the length of the blade 22 that forms trilobed wheel 11C.That is, be A, B, C if make the first impeller 11A, the second impeller 11B, the axial length of trilobed wheel 11C rotation separately, the pass of length is B < A < C.
In addition, the multiple impellers 11 that arrange between trilobed wheel 11C and bearing side end panel 13B are configured to, and rotate axial length identical with the axial length of rotation of trilobed wheel 11C.That is the axial length of rotation and the trilobed wheel 11C of the multiple impellers 11 that arrange between trilobed wheel 11C and bearing side end panel 13B are similarly C.
Like this, in present embodiment 1, each length of 3 impellers starting from the motor installation side end of cross flow fan 1 is changed.In the air conditioner that is mounted with cross flow fan, make the motor side configuration electric component of fan rotation.In addition, in the situation that air conditioner is added to additional function, be generally configured in motor side for the electric component of additional function.As such additional function, for example, can enumerate electric vacuum cleaner, deodorizer, ion generator etc.Therefore,, by configuring these electric components, motor, near suction air-flow motor installation side end or blow out air turbulence, impels NZ sound to produce.
But, as present embodiment 1, change by each length of 3 impellers making to start from motor installation side end, can make wind speed profile change, promote sonorific randomness.The trilobed wheel 11C that leaves motor installation side end is positioned at the position that can bring into play as fan wind pushing performance, therefore the longest by making to rotate axial length C, can improve wind pushing performance.In addition, in the impact that is subject to motor installation side end, the region that the first impeller 11A that flowing resistance increases is positioned at, need to make wind pushing performance (pressure) improve, and preferably makes the axial length A of rotation of the first impeller 11A follow trilobed wheel 11C elongated.On the other hand, have with the motor installation side end plate 13A of the first impeller 11A adjacency the axle sleeve 14 that motor reel is installed, the surrounding of this axle sleeve 14 is made up of the insulation rubber for vibration-inhibition.So, for vibration-inhibition and raising intensity, require the axial length A of rotation of the first impeller 11A shorter.Therefore, preferably the axial length A of the rotation of the first impeller 11A is shorter than the length C of trilobed wheel 11C.
And, the the second impeller 11B being clipped by the first impeller 11A and trilobed wheel 11C, preferably compares with the first impeller 11A and trilobed wheel 11C, rotates axial length B less, can change thus the generation direction (sound intensity, Sound Intensity) of sound.Relax thus NZ sound.
As mentioned above, the cross flow fan of present embodiment 1, make the axial length A of rotation of the first impeller 11A longer than the length B of the second impeller 11B, and the length C than trilobed wheel 11C is short, thereby the second impeller 11B changes the generation direction of sound, and the first impeller 11A makes pressure rise, trilobed wheel 11C improves wind pushing performance, can not reduce wind pushing performance thus and be reduced in the local NZ sound (depending on the rotation sound of rotating speed and the number of blade) producing in end.
In addition, be all the length C identical with trilobed wheel 11C by the multiple impellers 11 that make to arrange between trilobed wheel 11C and bearing side end panel 13B, can improve wind pushing performance.That is, in the multiple impellers 11 that are arranged between trilobed wheel 11C and bearing side end panel 13B, use the blade 22 that the trilobed wheel 11C the longest with the axial length of rotation is identical, can give full play to wind pushing performance as fan thus.In addition, because can use and the impeller of trilobed wheel 11C same shape, thus can sharing die, can boost productivity.
(mode of execution 2)
Fig. 4 is the front elevation of the cross flow fan 1 of embodiments of the present invention 2.The difference of the cross flow fan of present embodiment 2 and mode of execution 1 is, by the multiple impellers 11 that arrange between trilobed wheel 11C and bearing side end panel 13B, is all set as the rotation axial length B identical with the second impeller 11B.Can become thus the fan that intensity and rigidity are strong.That is, rotate by use the blade 22 that axial length is identical with the second the shortest impeller 11B, can make intensity and rigidity reinforced as fan, reduce quiet deflection.In addition, because can use and the impeller of the second impeller 11B same shape, thus can sharing die, can boost productivity.
(mode of execution 3)
Fig. 5 is the front elevation of the cross flow fan of embodiments of the present invention 3.The difference of the cross flow fan of present embodiment 3 and mode of execution 1 is, by the multiple impellers 11 that arrange between trilobed wheel 11C and bearing side end panel 13B, forms in the mode of alternate configurations the second impeller 11B and trilobed wheel 11C.Thus, can reduce the NZ sound producing from the whole region of fan.That is, the multiple impellers 11 that arrange between trilobed wheel 11C and bearing side end panel 13B have the blade 22 of different length B, C, form thus different wind speed profile, and consequently, the sound intensity of generation is different, therefore can relax the NZ sound producing with certain frequency.In addition, because can use and the impeller of the second impeller 11B and trilobed wheel 11C same shape, thus can sharing die, can boost productivity.
Utilizability in industry
As mentioned above, cross flow fan of the present invention can relax the abnormal sound of the specific frequencies such as rotation sound (NZ sound).The low noise of gas fan can be realized thus, the purposes of the gas fan of the air-conditioning internal stowage of using etc. at home-use, business, automobile can be applied to.
Claims (3)
1. a cross flow fan, it is provided with at multiple impellers near the position of periphery with multiple blades, and have the motorized motor installation side end of peace and the bearing side end at the other end of described motor installation side end, this cross flow fan is characterised in that:
Be disposed with the first impeller, the second impeller and trilobed wheel from described motor installation side end, described in the axial Length Ratio of rotation of described the first impeller, the axial length of rotation of the second impeller is long, and shorter than the axial length of the rotation of described trilobed wheel.
2. cross flow fan according to claim 1, is characterized in that:
The axial length of rotation of the impeller between described trilobed wheel and described bearing side end is identical with the axial length of rotation of described the second impeller or described trilobed wheel.
3. cross flow fan according to claim 1, is characterized in that:
Between described trilobed wheel and described bearing side end, alternately dispose impeller and the axial length of the rotation impeller identical with described trilobed wheel that the axial length of rotation is identical with described the second impeller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010216453A JP5659406B2 (en) | 2010-09-28 | 2010-09-28 | Cross flow fan |
| JP2010-216453 | 2010-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102434471A CN102434471A (en) | 2012-05-02 |
| CN102434471B true CN102434471B (en) | 2014-09-03 |
Family
ID=45982749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110340570.1A Active CN102434471B (en) | 2010-09-28 | 2011-09-28 | Cross-flow fan |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5659406B2 (en) |
| CN (1) | CN102434471B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015010730A (en) * | 2013-06-27 | 2015-01-19 | パナソニック株式会社 | Air conditioner |
| JP6256595B2 (en) * | 2014-03-25 | 2018-01-10 | 京セラドキュメントソリューションズ株式会社 | Cross flow fan, electronic equipment, impeller |
| CN107588041A (en) * | 2017-09-07 | 2018-01-16 | 珠海格力电器股份有限公司 | Cross flow wind wheel and air conditioner |
| JP7370220B2 (en) * | 2017-09-27 | 2023-10-27 | ダイキン工業株式会社 | air conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3048571A1 (en) * | 1980-12-22 | 1982-07-22 | Ltg Lufttechnische Gmbh, 7000 Stuttgart | Helical impeller blade cross-flow fan - has cut=off gap specified for max pressure ratio and efficiency at min. noise |
| CN1854526A (en) * | 2005-04-21 | 2006-11-01 | 海尔集团公司 | Transverse flow fan of indoor unit of air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6441690U (en) * | 1987-09-05 | 1989-03-13 | ||
| JPH05340378A (en) * | 1992-06-08 | 1993-12-21 | Mitsubishi Electric Corp | Cross flow fan |
| JPH102576A (en) * | 1996-06-17 | 1998-01-06 | Toshiba Corp | Indoor fan of air conditioner |
| JP2002048085A (en) * | 2000-07-28 | 2002-02-15 | Mitsubishi Electric Corp | Impeller for compound multiblade blower, compound multiblade blower and air conditioner |
-
2010
- 2010-09-28 JP JP2010216453A patent/JP5659406B2/en not_active Expired - Fee Related
-
2011
- 2011-09-28 CN CN201110340570.1A patent/CN102434471B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3048571A1 (en) * | 1980-12-22 | 1982-07-22 | Ltg Lufttechnische Gmbh, 7000 Stuttgart | Helical impeller blade cross-flow fan - has cut=off gap specified for max pressure ratio and efficiency at min. noise |
| CN1854526A (en) * | 2005-04-21 | 2006-11-01 | 海尔集团公司 | Transverse flow fan of indoor unit of air conditioner |
Non-Patent Citations (3)
| Title |
|---|
| JP特開2002-48085A 2002.02.15 |
| JP特開平10-2576A 1998.01.06 |
| JP特開平5-340378A 1993.12.21 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102434471A (en) | 2012-05-02 |
| JP5659406B2 (en) | 2015-01-28 |
| JP2012072675A (en) | 2012-04-12 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |