CN105275875A - Centrifugal fan blade and centrifugal fan - Google Patents
Centrifugal fan blade and centrifugal fan Download PDFInfo
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- CN105275875A CN105275875A CN201510673174.9A CN201510673174A CN105275875A CN 105275875 A CN105275875 A CN 105275875A CN 201510673174 A CN201510673174 A CN 201510673174A CN 105275875 A CN105275875 A CN 105275875A
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Abstract
The invention provides a centrifugal fan blade and a centrifugal fan. The centrifugal fan blade comprises a front cover plate (10), a rear cover plate (20) and a plurality of blades (30) arranged between the front cover plate (10) and the rear cover plate (20). Blade profile inlet angles at the joints of the blades (30) and the front cover plate (10) are betaa1, and blade profile inlet angles at the joints of the blades (30) and the rear cover plate (20) are betab1, wherein betaa1 is smaller than betab1. According to the centrifugal fan blade and the centrifugal fan, the blade profile inlet angles at the joints of the blades (30) and the front cover plate (10) are smaller than the blade profile inlet angles at the joints of the blades (30) and the rear cover plate (20), and therefore the impact of airflow at an inlet can be reduced, noise is lowered, and the pneumatic efficiency of the fan blade is improved.
Description
Technical field
The present invention relates to centrifugal blower field, in particular to a kind of centrifugation blade and centrifugal blower.
Background technique
In prior art, the backward centrifugation blade of courtyard machine to back shroud entrance edge of blade from front shroud along the circumferential direction without significant change, is unfavorable for reducing equipment acoustic noise, and is unfavorable for improving tonequality in phase angle; The less easy generation air-flow stagnant area of angle of exit edge of blade and front shroud, reduces fan efficiency.
Summary of the invention
The present invention aims to provide a kind of centrifugation blade and the centrifugal blower that can improve reduction noise.
The invention provides a kind of centrifugation blade, comprise front shroud, back shroud and be arranged on the multiple blades between front shroud and back shroud, the blade profile Inlet cone angle of blade and front shroud joint is β a1; The blade profile Inlet cone angle of blade and back shroud joint is β b1, wherein, and β a1 < β b1.
Further, the blade profile Inlet cone angle of blade is the trend increased gradually along front shroud to back shroud direction.
Further, the blade profile chord length of blade is the trend increased gradually along front shroud to back shroud direction.
Further, blade is crossing with the first blade profile of front shroud joint and the second blade profile of blade and back shroud joint.
Further, the front acies of the first blade profile is positioned at the fan blade rotary side of the front acies of the second blade profile, and the fan blade derotation that the rear acies of the first blade profile is positioned at the rear acies of the second blade profile is changed one's position.
Further, the blade inlet edge of blade extends along sense of rotation from front shroud to back shroud, and curvature is in increase tendency gradually.
Present invention also offers a kind of centrifugal blower, comprise aforesaid centrifugation blade.
According to centrifugation blade of the present invention and centrifugal blower, by the blade profile Inlet cone angle making the blade profile Inlet cone angle of blade and front shroud joint be less than blade and back shroud joint, thus the impact loss of air-flow in inlet can be reduced, reduce noise, improve fan blade pneumatic efficiency.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic perspective view according to centrifugation blade of the present invention;
Fig. 2 is the projection drawing of centrifugation blade according to the present invention in back shroud plane.
Description of reference numerals:
10, front shroud; 20, back shroud; 30, blade.
Embodiment
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, according to centrifugation blade of the present invention, the multiple blades 30 comprising front shroud 10, back shroud 20 and be arranged between front shroud 10 and back shroud 20, blade 30 is β a1 with the blade profile Inlet cone angle of front shroud 10 joint; Blade 30 is β b1 with the blade profile Inlet cone angle of back shroud 20 joint, wherein, and β a1 < β b1.The present invention is less than the blade profile Inlet cone angle β b1 of blade 30 and back shroud 20 joint by making blade 30 with the blade profile Inlet cone angle β a1 of front shroud 10 joint, thus can reduce the impact loss of air-flow in inlet, reduces noise, improves fan blade pneumatic efficiency.
Preferably, the blade profile Inlet cone angle of blade 30 is the trend increased gradually along front shroud 10 to back shroud 20 direction, thus make blade profile Inlet cone angle meet Changing Pattern from front shroud 10 to back shroud 20 flow angle, more be conducive to reducing air-flow at the impact loss of blade 30 inlet and noise, improve fan blade pneumatic efficiency.
Further, shown in composition graphs 2, β a2 refers to the angle of the blade profile that blade is crossing with front shroud and impeller outer edge circumferencial direction, and β b2 refers to the angle of the blade profile that blade is crossing with back shroud and impeller outer edge circumferencial direction.Usually, between β a2, β b2 value 30 ~ 50 degree, and meet β b2> β a2.That is, the angle of exit edge of blade and front shroud is comparatively large, is weakened the fluid stagnation district of this position by the angle increasing blade and front shroud, thus improves fan blade pneumatic efficiency.
Shown in composition graphs 2, the blade profile chord length of blade 30 in the trend increased gradually, effectively can improve the workmanship ability of blade 30 along front shroud 10 to back shroud 20 direction, and then improves the efficiency of centrifugation blade.Particularly, in fig. 2, blade 30 is la1 with the blade profile chord length of front shroud 10 joint, blade 30 is lb1, lb1 > la1 with the blade profile chord length of back shroud 20 joint, and by front shroud 10 to back shroud 20, blade profile chord length increases gradually, improves blade 30 in workmanship ability.
As shown in Figure 2, blade 30 is crossing with the first blade profile la of front shroud 10 joint and the second blade profile lb of blade 30 and back shroud 20 joint.Particularly, the front acies of the first blade profile is positioned at the fan blade rotary side of the front acies of the second blade profile, and the fan blade derotation that the rear acies of the first blade profile is positioned at the rear acies of the second blade profile is changed one's position.Realize the blade profile dislocation on blade 30 diverse location, thus reach the effect improving tonequality, but also effectively can ensure that blade 30 and front shroud 10 have larger angle to avoid blade 30 and front shroud 10 joint to produce serious air-flow stagnant area, thus effectively improve fan blade efficiency.More effectively, the blade inlet edge of blade 30 extends from front shroud 10 to back shroud 20 along sense of rotation, and curvature is in increase tendency gradually, the blade profile on blade 30 diverse location can be made further misplace, improve tonequality, reduction noise.
Present invention also offers a kind of centrifugal blower, comprise aforesaid centrifugation blade, thus reduce centrifugal fan noise, improve tonequality, improve fan efficiency.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
According to centrifugation blade of the present invention and centrifugal blower, the blade profile Inlet cone angle of blade 30 and back shroud 20 joint is less than with the blade profile Inlet cone angle of front shroud 10 joint by making blade 30, thus the impact loss of air-flow in inlet can be reduced, reduce noise, improve fan blade pneumatic efficiency.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a centrifugation blade, the multiple blades (30) comprising front shroud (10), back shroud (20) and be arranged between described front shroud (10) and back shroud (20), is characterized in that,
Described blade (30) is β a1 with the blade profile Inlet cone angle of described front shroud (10) joint;
Described blade (30) is β b1 with the blade profile Inlet cone angle of described back shroud (20) joint, wherein, and β a1 < β b1.
2. centrifugation blade according to claim 1, is characterized in that,
The blade profile Inlet cone angle of described blade (30) is the trend increased gradually along front shroud (10) to back shroud (20) direction.
3. centrifugation blade according to claim 1, is characterized in that,
The blade profile chord length of described blade (30) is the trend increased gradually along front shroud (10) to back shroud (20) direction.
4. centrifugation blade according to claim 1, is characterized in that,
Described blade (30) is crossing with the first blade profile of described front shroud (10) joint and the second blade profile of described blade (30) and described back shroud (20) joint.
5. centrifugation blade according to claim 4, is characterized in that,
The front acies of described first blade profile is positioned at the fan blade rotary side of the front acies of described second blade profile, and the fan blade derotation that the rear acies of described first blade profile is positioned at the rear acies of described second blade profile is changed one's position.
6. centrifugation blade according to any one of claim 1 to 5, is characterized in that,
The blade inlet edge of described blade (30) extends from front shroud (10) to back shroud (20) along sense of rotation, and curvature is in increase tendency gradually.
7. a centrifugal blower, comprises centrifugation blade, it is characterized in that, the centrifugation blade of described centrifugation blade according to any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510673174.9A CN105275875B (en) | 2015-10-15 | 2015-10-15 | Centrifugation blade and centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510673174.9A CN105275875B (en) | 2015-10-15 | 2015-10-15 | Centrifugation blade and centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105275875A true CN105275875A (en) | 2016-01-27 |
| CN105275875B CN105275875B (en) | 2017-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510673174.9A Active CN105275875B (en) | 2015-10-15 | 2015-10-15 | Centrifugation blade and centrifugal blower |
Country Status (1)
| Country | Link |
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| CN (1) | CN105275875B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023862A (en) * | 2016-02-01 | 2017-08-08 | 宁波方太厨具有限公司 | A kind of top-sucking kitchen ventilator |
| CN107165859A (en) * | 2017-04-28 | 2017-09-15 | 广东威灵电机制造有限公司 | Movable vane wheel, blower fan system and electric tool |
| CN108843620A (en) * | 2018-06-06 | 2018-11-20 | 广州陈扬枝科技有限责任公司 | A kind of return channel blade and its design method |
| CN109779964A (en) * | 2019-04-02 | 2019-05-21 | 萨震压缩机（上海）有限公司 | Energy-saving centrifugal impeller |
| CN113028502A (en) * | 2021-03-26 | 2021-06-25 | Tcl空调器(中山)有限公司 | Fan and ventilation equipment |
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| JPH05312189A (en) * | 1992-05-13 | 1993-11-22 | Daikin Ind Ltd | Air conditioner |
| JP2003206892A (en) * | 2002-01-10 | 2003-07-25 | Mitsubishi Heavy Ind Ltd | Turbo fan and air conditioner therewith |
| JP2007170771A (en) * | 2005-12-26 | 2007-07-05 | Daikin Ind Ltd | Turbofan and indoor unit of air conditioner using the same |
| JP2007170331A (en) * | 2005-12-26 | 2007-07-05 | Daikin Ind Ltd | Turbofan and indoor unit of air conditioner using it |
| JP2008223741A (en) * | 2007-03-16 | 2008-09-25 | Daikin Ind Ltd | Centrifugal blower |
| JP2009150380A (en) * | 2007-11-26 | 2009-07-09 | Daikin Ind Ltd | Centrifugal fan |
| JP2010133254A (en) * | 2008-12-02 | 2010-06-17 | Daikin Ind Ltd | Centrifugal blower, and air conditioner provided with the same |
| JP2013117233A (en) * | 2008-04-18 | 2013-06-13 | Mitsubishi Electric Corp | Turbofan and air conditioner |
| CN205173054U (en) * | 2015-10-15 | 2016-04-20 | 珠海格力电器股份有限公司 | Centrifugation fan blade and centrifugal fan |
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2015
- 2015-10-15 CN CN201510673174.9A patent/CN105275875B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05312189A (en) * | 1992-05-13 | 1993-11-22 | Daikin Ind Ltd | Air conditioner |
| JP2003206892A (en) * | 2002-01-10 | 2003-07-25 | Mitsubishi Heavy Ind Ltd | Turbo fan and air conditioner therewith |
| JP2007170771A (en) * | 2005-12-26 | 2007-07-05 | Daikin Ind Ltd | Turbofan and indoor unit of air conditioner using the same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023862A (en) * | 2016-02-01 | 2017-08-08 | 宁波方太厨具有限公司 | A kind of top-sucking kitchen ventilator |
| CN107023862B (en) * | 2016-02-01 | 2019-11-12 | 宁波方太厨具有限公司 | A kind of top-sucking kitchen ventilator |
| CN107165859A (en) * | 2017-04-28 | 2017-09-15 | 广东威灵电机制造有限公司 | Movable vane wheel, blower fan system and electric tool |
| CN108843620A (en) * | 2018-06-06 | 2018-11-20 | 广州陈扬枝科技有限责任公司 | A kind of return channel blade and its design method |
| CN108843620B (en) * | 2018-06-06 | 2023-09-19 | 广州陈扬枝科技有限责任公司 | Reflux device blade and design method thereof |
| CN109779964A (en) * | 2019-04-02 | 2019-05-21 | 萨震压缩机（上海）有限公司 | Energy-saving centrifugal impeller |
| CN113028502A (en) * | 2021-03-26 | 2021-06-25 | Tcl空调器(中山)有限公司 | Fan and ventilation equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105275875B (en) | 2017-12-26 |
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