CN112762009B - Cross-flow blade, cross-flow fan and air conditioner - Google Patents
Cross-flow blade, cross-flow fan and air conditioner Download PDFInfo
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- CN112762009B CN112762009B CN202110117164.2A CN202110117164A CN112762009B CN 112762009 B CN112762009 B CN 112762009B CN 202110117164 A CN202110117164 A CN 202110117164A CN 112762009 B CN112762009 B CN 112762009B
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- cross
- blade
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- pressure surface
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present disclosure provides a cross-flow blade, a cross-flow fan and an air conditioner, the cross-flow blade including: the blade body is provided with a pressure surface; the pressure surface comprises at least three arcs; taking the arc diameter of the pressure surface corresponding to the midpoint O of the chord length L of the blade body as D, taking the rotating shaft center of the through-flow fan blade as the center of a circle, taking the end part of the blade body close to the center of a circle as a first end, and taking the end part of the blade body far away from the center of a circle as a second end; the diameter of an arc corresponding to the arc of the section a from the midpoint O to the first end is Da, and the requirement that Da is (1+ Ta%) × D is met; the arc diameter of the b-th arc from the midpoint O to the second end is Db, and Db ═ 1+ Tb%) × D. According to the cross-flow fan blade, the pressure surface is designed in a multi-section type circular arc mode, the circular arc is in a gradually expanding shape from the middle point O of the chord length L to the two ends, the aerodynamic resistance caused by inflow and outflow of airflow from the pressure surface can be effectively reduced, the running load of a fan can be improved, and the power of a motor can be reduced; meanwhile, the vortex noise caused by the wake of the cross-flow fan blade can be reduced, and the corresponding noise is reduced.
Description
Technical Field
The disclosure belongs to the technical field of air conditioners, and particularly relates to a cross-flow blade, a cross-flow fan and an air conditioner.
Background
The cross flow fan has the advantages of simple structure, small volume and good binary property, can freely select the length of the impeller according to the air quantity requirement, uniformly and intensively supplies air, and is widely applied to systems such as air conditioners and the like. The working characteristics of the device include: when the impeller runs in a stable rotating mode, gas flows in and out of the blade cascade twice, the gas does deceleration movement when entering and exiting the blade cascade for the first time, the gas does acceleration movement when entering and exiting the blade cascade for the second time, the absolute speed of the gas is in the acceleration process in the whole moving process, and the result is that the rotating blade cascade does work on the gas.
The cross flow blades used in the related art to avoid the air flow separation phenomenon cannot effectively reduce aerodynamic resistance caused by the inflow and outflow of air flow from the pressure surface, and can cause vortex noise.
Disclosure of Invention
Therefore, the technical problem to be solved by the present disclosure is to provide a cross-flow blade, a cross-flow fan and an air conditioner, in which aerodynamic resistance caused by inflow and outflow of an airflow from a pressure surface cannot be effectively reduced, and eddy noise is caused.
In order to solve the above problems, the present disclosure provides a cross-flow blade including:
the blade body is provided with a pressure surface;
the pressure surface comprises at least three arcs;
taking the arc diameter of the pressure surface corresponding to the midpoint O of the chord length L of the blade body as D, taking the rotating shaft center of the through-flow fan blade as the center of a circle, taking the end part of the blade body close to the center of a circle as a first end, and taking the end part of the blade body far away from the center of a circle as a second end;
the diameter of an arc corresponding to the arc of the section a from the midpoint O to the first end is Da, and the requirement that Da is (1+ Ta%) × D is met; the arc diameter of the b-th section of arc from the midpoint O to the second end is Db, and the Db is (1+ Tb%). times.D;
wherein a and b are integers greater than or equal to 1.
In some embodiments, Ta-0.5-6, and/or Tb-2-16 are satisfied.
In some embodiments, Ta < Tb is satisfied when a ═ b.
In some embodiments, when c is a +1, Tc/Ta is 0.78-0.92; and/or, when d is b +1, Td/Tb is 0.78-0.92.
In some embodiments, the thickest part of the blade body is located at 7.5% to 25% of the chord length L starting from the first end.
A cross-flow fan comprises at least one cross-flow blade.
An air conditioner comprises at least one through-flow blade.
In some embodiments, the cross-flow fan is disposed on the cross-flow fan, and the air conditioner further includes a scroll casing, the cross-flow fan is disposed in the scroll casing, and the scroll casing is provided with an air inlet and an air outlet.
In some embodiments, a heat exchanger is provided in the air inlet, and/or an air deflector is provided in the air outlet.
The cross-flow blade, the cross-flow fan and the air conditioner provided by the disclosure have the following beneficial effects:
according to the cross-flow fan blade, the pressure surface is designed in a multi-section type circular arc mode, the circular arc is in a gradually expanding shape from the middle point O of the chord length L to the two ends, the aerodynamic resistance caused by inflow and outflow of airflow from the pressure surface can be effectively reduced, the running load of a fan can be improved, and the power of a motor can be reduced; meanwhile, the vortex noise caused by the wake of the cross-flow fan blade can be reduced, and the corresponding noise is reduced.
Drawings
FIG. 1 is a schematic view of the structure of a cross-flow blade and the diameter of an arc corresponding to an a-th arc according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of the arc diameter of a circle segment b of an embodiment of the present disclosure;
FIG. 3 is a schematic view of the through-flow blade drag of an embodiment of the present disclosure;
FIG. 4 is a cross flow vane and related art air flow test curve of an embodiment of the present disclosure;
FIG. 5 is a noise test plot of a through-flow vane of an embodiment of the present disclosure and a related art;
fig. 6 is a schematic structural diagram of an air conditioner according to an embodiment of the present disclosure.
The reference numerals are represented as:
1. a blade body; 2. a pressure surface; 3. a volute; 4. an air inlet; 5. an air outlet; 6. a heat exchanger; 7. an air deflector; 8. a first end; 9. a second end.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
As shown in fig. 1 to 5, an embodiment of the present disclosure provides a cross flow blade, including: the blade comprises a blade body 1, wherein a pressure surface 2 is arranged on the blade body 1; the pressure surface 2 comprises at least three arcs; taking the arc diameter of the pressure surface 2 corresponding to the midpoint O of the chord length L of the blade body 1 as D, taking the rotating axis of the through-flow fan blade as the center of a circle, taking the end part of the blade body 1 close to the center of a circle as a first end 8, and taking the end part of the blade body 1 far from the center of a circle as a second end 9; the arc diameter corresponding to the arc of the section a from the midpoint O to the first end 8 is Da, and satisfies Da ═ 1+ Ta%) × D; the arc diameter of the b-th arc from the midpoint O to the second end 9 is Db, and Db ═ 1+ Tb%) × D; wherein a and b are integers greater than or equal to 1.
According to the cross-flow fan blade, the pressure surface 2 is designed in a multi-section type circular arc mode, the circular arc is in a gradually expanding shape from the middle point O of the chord length L to the two ends, the aerodynamic resistance caused by inflow and outflow of airflow from the pressure surface 2 can be effectively reduced, the running load of a fan can be improved, and the power of a motor can be reduced; meanwhile, the vortex noise caused by the wake of the cross-flow fan blade can be reduced, and the corresponding noise is reduced.
In some embodiments, Ta is 0.5 to 6, and the value of Ta for the arc becomes progressively smaller the closer to the first end 8. Tb is 2-16, and the value of Tb corresponding to the arc gradually decreases as the distance from the second end 9 increases. When this range is satisfied, the through-flow blades have less aerodynamic resistance and less vortex noise.
In some embodiments, when a is b, Ta < Tb is satisfied, so that the divergent amplitude of the first end 8 of the cross-flow blade is smaller than that of the second end 9, so that the aerodynamic resistance of the cross-flow blade is smaller and the vortex noise is smaller.
In some embodiments, when c is a +1, Tc/Ta is 0.78-0.92; and/or when d is equal to b +1, Td/Tb is equal to 0.78-0.92, so that the air inlet and outlet efficiency and the noise can be considered, and the optimal resistance reduction and noise reduction effects can be achieved.
In some embodiments, the thickest part of the blade body 1 is located at 7.5% -25% of the chord length L from the first end 8, so that the air inlet and outlet efficiency and noise can be considered, and the optimal resistance reduction and noise reduction effects can be achieved.
When the airflow enters the first end 8 from the front of the blade, the airflow velocity on the upper and lower surfaces of the airfoil is different due to the viscosity of the air, and a pressure difference is formed, so that a lift force Fl is generated. The airfoil resistance Fd is generated by the effects of the front-back pressure difference, the surface viscosity and the like. The resistance Fd is a component parallel to the incoming flow direction, and adopts a gradually expanding blade shape to reduce the resistance and maintain the corresponding lift force.
The test on the complete machine can realize larger air volume, and simultaneously, the load of the motor is reduced, and the noise of the complete machine is reduced. The test comparison of the shell shows that the air volume is improved by about 3-5%, the power is reduced by about 2-4%, and the noise is reduced by about 1-1.5 dB.
The embodiment provides a crossflow blower comprising at least one crossflow blade as described above.
As shown in fig. 6, the present embodiment provides an air conditioner including at least one cross flow blade as described above.
In some embodiments, the cross-flow blade is arranged on a cross-flow fan, the air conditioner further comprises a volute 3, the cross-flow fan is arranged in the volute 3, and the volute 3 is provided with an air inlet 4 and an air outlet 5. The air inlet 4 is internally provided with a heat exchanger 6, and/or the air outlet 5 is provided with an air deflector 7.
According to the air conditioner disclosed by the embodiment of the disclosure, air flow flows into the evaporator from the air inlet 4 above the air conditioner, flows along the scroll 3 after being accelerated by the cross-flow fan, and finally flows out from the air outlet 5, and can be guided by the air deflector 7.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present disclosure is to be considered as limited only by the preferred embodiments and not limited to the specific embodiments described herein, and all changes, equivalents and modifications that come within the spirit and scope of the disclosure are desired to be protected. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present disclosure, and these improvements and modifications should also be considered as the protection scope of the present disclosure.
Claims (7)
1. A flow through vane, comprising:
the blade body (1), the pressure surface (2) is arranged on the blade body (1);
the pressure surface (2) comprises at least three arcs;
taking the arc diameter of the pressure surface (2) corresponding to the midpoint O of the chord length L of the blade body (1) as D, taking the rotating axis of the through-flow fan blade as the center of a circle, taking the end part of the blade body (1) close to the center of a circle as a first end (8), and taking the end part of the blade body (1) far away from the center of a circle as a second end (9);
the diameter of a circular arc corresponding to the a-th circular arc from the middle point O to the first end (8) is Da, and Da = (1+ Ta%) × D is satisfied; the arc diameter of the b-th arc from the midpoint O to the second end (9) is Db, and Db = (1+ Tb%). times.D is satisfied;
wherein a and b are integers greater than or equal to 1;
when c = a +1, Tc/Ta = 0.78-0.92; and/or, when d = b +1, Td/Tb = 0.78-0.92;
ta =0.5-6, and/or Tb = 2-16.
2. The flow-through vane of claim 1 wherein Ta < Tb is satisfied when a = b.
3. The flow blade according to claim 1, characterized in that the blade body (1) is thickest at 7.5-25% of the chord length L starting from the first end (8).
4. Crossflow blower comprising at least one crossflow vane according to any of claims 1 to 3.
5. An air conditioner comprising at least one cross flow blade as set forth in any one of claims 1 to 3.
6. The air conditioner according to claim 5, wherein the cross-flow blade is arranged on a cross-flow fan, the air conditioner further comprises a volute (3), the cross-flow fan is arranged in the volute (3), and the volute (3) is provided with an air inlet (4) and an air outlet (5).
7. Air conditioner according to claim 6, characterized in that a heat exchanger (6) is arranged in the air inlet (4) and/or the air outlet (5) is provided with a wind deflector (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110117164.2A CN112762009B (en) | 2021-01-28 | 2021-01-28 | Cross-flow blade, cross-flow fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110117164.2A CN112762009B (en) | 2021-01-28 | 2021-01-28 | Cross-flow blade, cross-flow fan and air conditioner |
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| Publication Number | Publication Date |
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| CN112762009A CN112762009A (en) | 2021-05-07 |
| CN112762009B true CN112762009B (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110117164.2A Active CN112762009B (en) | 2021-01-28 | 2021-01-28 | Cross-flow blade, cross-flow fan and air conditioner |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277329A (en) * | 1999-06-11 | 2000-12-20 | 建谊国际有限公司 | Free fan with inclined airflow |
| CN1323952A (en) * | 2000-05-16 | 2001-11-28 | 松下电器产业株式会社 | Direct flow fan, and air conditioner having said fan |
| JP2012007473A (en) * | 2010-06-22 | 2012-01-12 | Panasonic Corp | Cross-flow fan and air conditioner equipped with the cross-flow fan |
| CN103573694A (en) * | 2012-07-26 | 2014-02-12 | 珠海格力电器股份有限公司 | Cross-flow impeller, cross-flow fan and wall-mounted air conditioner |
| CN104564804A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Wind wheel blade, cross-flow wind wheel and design method of wind wheel blade |
| DE102016211315A1 (en) * | 2016-06-23 | 2017-12-28 | MTU Aero Engines AG | Runner or vane with raised areas |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005201203A (en) * | 2004-01-19 | 2005-07-28 | Sanden Corp | Multiblade fan |
| JP4918650B2 (en) * | 2006-06-23 | 2012-04-18 | ダイキン工業株式会社 | Multi-wing fan |
| US9995316B2 (en) * | 2014-03-11 | 2018-06-12 | Revcor, Inc. | Blower assembly and method |
| DE102014012764A1 (en) * | 2014-09-02 | 2016-03-03 | Man Diesel & Turbo Se | Radial compressor stage |
| CN107313977B (en) * | 2017-07-25 | 2024-03-22 | 珠海格力电器股份有限公司 | Centrifugal fan blade, centrifugal fan and air conditioner |
-
2021
- 2021-01-28 CN CN202110117164.2A patent/CN112762009B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277329A (en) * | 1999-06-11 | 2000-12-20 | 建谊国际有限公司 | Free fan with inclined airflow |
| CN1323952A (en) * | 2000-05-16 | 2001-11-28 | 松下电器产业株式会社 | Direct flow fan, and air conditioner having said fan |
| JP2012007473A (en) * | 2010-06-22 | 2012-01-12 | Panasonic Corp | Cross-flow fan and air conditioner equipped with the cross-flow fan |
| CN103573694A (en) * | 2012-07-26 | 2014-02-12 | 珠海格力电器股份有限公司 | Cross-flow impeller, cross-flow fan and wall-mounted air conditioner |
| CN104564804A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Wind wheel blade, cross-flow wind wheel and design method of wind wheel blade |
| DE102016211315A1 (en) * | 2016-06-23 | 2017-12-28 | MTU Aero Engines AG | Runner or vane with raised areas |
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| Publication number | Publication date |
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| CN112762009A (en) | 2021-05-07 |
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