CN2627252Y - Asymmetric double air intake centrifugal fan - Google Patents
Asymmetric double air intake centrifugal fan Download PDFInfo
- Publication number
- CN2627252Y CN2627252Y CN 03247394 CN03247394U CN2627252Y CN 2627252 Y CN2627252 Y CN 2627252Y CN 03247394 CN03247394 CN 03247394 CN 03247394 U CN03247394 U CN 03247394U CN 2627252 Y CN2627252 Y CN 2627252Y
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- CN
- China
- Prior art keywords
- motor
- centrifugal impeller
- air inlet
- centrifugal
- suction port
- 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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Abstract
A dissymmetric centrifugal blower with double air inlet comprises an air inlet, a volute casing, a centrifugal impeller, and an electric motor, the air inlet caliber at the electric motor side is larger than the air inlet caliber at the electric motor opposite side; the inner and outer diameters of the centrifugal impeller at the electric motor side is larger than the inner and outer diameters of the centrifugal impeller at the electric motor opposite side; the outer diameter of the centrifugal impeller at the electric motor side is larger than the outer diameter of the centrifugal impeller at the electric motor opposite side, the air inlet conditions at both sides of the air blower are changes, thereby the aerodynamic forces of impellers at two sides are essentially same, the electric motor shaft is under balanced force, meanwhile, because the wind pressures generated by the impellers at two sides are essentially same, the turbulence noise and vibration noise are eliminated.
Description
Technical field
The utility model relates to a kind of centrifugal blower, especially a kind of two air inlet centrifugal blowers that are applicable to fields such as air conditioner, household electric appliance, vehicle, ventilation equipment.
Background technique
In background technique, the bore of the two air inlet centrifugal blower motor side suction ports of symmetric type is identical with the bore of opposite side suction port, the external diameter of both sides centrifugal impeller is identical, boss ratio is also identical, because stopping of motor, make that the both sides inlet air conditions is different, cause the aerodynamic force difference of both sides centrifugal impeller, thereby cause the motor shaft discontinuity equalization, produced vibration noise, simultaneously owing to the both sides centrifugal impeller does not move at same operating point, the difference of its pressure and make air-flow in the spiral case become chaotic has produced eddy current crack, has increased flow losses.
Summary of the invention
The purpose of this utility model is: provide a kind of asymmetric two air inlet centrifugal blowers, can not only effectively reduce vibration noise, and can also reduce eddy current crack, reduce flow losses, play the overall noise that reduces blower fan, the effect of raising the efficiency.
The object of the present invention is achieved like this: the two air inlet centrifugal blowers of a kind of asymmetric, comprise suction port, spiral case, centrifugal impeller, motor, and suction port is divided into the suction port of motor side, the suction port of motor offside.Its special way is: the bore of the suction port of the relative aperture motor offside of the suction port of motor side is big.
The bore of the suction port of motor side be the motor offside the suction port bore 1.01--10 doubly.
The bore of the suction port of motor side is 1.25 times of suction port bore of motor offside.
The boss ratio of motor side centrifugal impeller is bigger than the boss ratio of motor offside centrifugal impeller.
The boss ratio of motor side centrifugal impeller is 1.01-10 a times of motor offside centrifugal impeller boss ratio.
The boss ratio of motor side centrifugal impeller is 1.1 times of motor offside centrifugal impeller boss ratio.
The external diameter of motor side centrifugal impeller is bigger than the external diameter of motor offside centrifugal impeller.
The external diameter of motor side centrifugal impeller is 1.01--10 a times of motor offside centrifugal impeller external diameter.
The external diameter of motor side centrifugal impeller is 1.5 times of motor offside centrifugal impeller external diameter.
Suction port is cone barrel type, for the arc tubular or for arc.
The two air inlet centrifugal blowers of the utility model asymmetric, the bore of the suction port of the relative aperture motor offside of the suction port of motor side is big; The boss ratio of motor side centrifugal impeller is bigger than the boss ratio of motor offside centrifugal impeller; The external diameter of motor side centrifugal impeller is bigger than the external diameter of motor offside centrifugal impeller.Changed the inlet air conditions of blower fan both sides, caused the aerodynamic force of both sides centrifugal impeller basic identical, the motor shaft stress equalization because the blast that the both sides centrifugal impeller produces is substantially the same, has been eliminated eddy current crack, vibration noise simultaneously.
Description of drawings
Fig. 1 is the plan view of the two air inlet centrifugal blowers of the utility model asymmetric.
Fig. 2 is the left view of the two air inlet centrifugal blowers of the utility model asymmetric.
Fig. 3 is the right elevation of the two air inlet centrifugal blowers of the utility model asymmetric.
Fig. 4 is that the suction port of the two air inlet centrifugal blowers of the utility model asymmetric is the front view of arc.
Fig. 5 is that the suction port of the two air inlet centrifugal blowers of the utility model asymmetric is the front view of arc tubular.
Fig. 6 is that the suction port of the two air inlet centrifugal blowers of the utility model asymmetric is the front view of cone barrel type.
Embodiment
101, motor side suction port, 102, motor is to side-inlet, 2, motor, 3, spiral case, 401, the motor side centrifugal impeller, 402, motor offside centrifugal impeller.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6.The two air inlet centrifugal blowers of the utility model asymmetric, comprise spiral case 3, centrifugal impeller 401,402, motor 2, suction port 101,102, motor 2 is fixed on the spiral case 3, can be arc as motor side suction port 101 and motor to the shape of side-inlet 102, the arc tubular, cone barrel type, and the relative aperture motor of motor side suction port 101 is big to the bore of side-inlet 102, the bore of motor side suction port 101 is that motor is to 1.01 of side-inlet 102 bores, 1.3,1.5,1.7,1.9,2,4,7,10 times, motor side suction port 101 is positioned at the side that spiral case 3 is installed motor 2, the suction port 102 of motor offside is positioned at the opposite side of spiral case 3, centrifugal impeller 401,402 is fixing with the axle of motor 2, centrifugal impeller 401,402 can be forward direction, the back to, radially, motor side centrifugal impeller 401 boss ratios are bigger than the boss ratio of motor offside centrifugal impeller 402, and the boss ratio of motor side centrifugal impeller 401 is 1.01 of motor offside centrifugal impeller 402 boss ratios, 1.3,1.7,1.9,2,4,10 times; The external diameter of motor side centrifugal impeller 401 is bigger than the external diameter of motor offside centrifugal impeller 402, the external diameter of motor side centrifugal impeller 401 is 1.01,1.3,1.5,1.7,1.9,2,4,10 times of motor offside centrifugal impeller 402 external diameters, driving two centrifugal impellers 401,402 that fuse by motor 2 rotates in spiral case 3, thereby drive gas motion, produce blast, wind speed, play draught effect.
Claims (10)
1, the two air inlet centrifugal blowers of a kind of asymmetric, comprise suction port, spiral case, centrifugal impeller, motor, suction port is divided into the suction port of motor side suction port, motor offside, it is characterized in that: the bore of the suction port of the relative aperture motor offside of the suction port of motor side is big.
2, the two air inlet centrifugal blowers of asymmetric according to claim 1 is characterized in that: the bore of the suction port of motor side be the motor offside the suction port bore 1.01--10 doubly.
3, the two air inlet centrifugal blowers of asymmetric according to claim 2 is characterized in that: the bore of the suction port of motor side is 1.25 times of suction port bore of motor offside.
4, according to claim 1, the two air inlet centrifugal blowers of 2 or 3 described asymmetrics, it is characterized in that: the boss ratio of motor side centrifugal impeller is bigger than the boss ratio of motor offside centrifugal impeller.
5, the two air inlet centrifugal blowers of asymmetric according to claim 4 is characterized in that: the boss ratio of motor side centrifugal impeller is 1.01-10 a times of motor offside centrifugal impeller boss ratio.
6, the two air inlet centrifugal blowers of asymmetric according to claim 5, it is characterized in that: the boss ratio of motor side centrifugal impeller is 1.1 times of motor offside centrifugal impeller boss ratio.
7, according to claim 1, the two air inlet centrifugal blowers of 2 or 3 described asymmetrics, it is characterized in that: the external diameter of motor side centrifugal impeller is bigger than the external diameter of motor offside centrifugal impeller.
8, asymmetric air inlet centrifugal blower according to claim 7 is characterized in that: the external diameter of motor side centrifugal impeller is 1.01-10 a times of motor offside centrifugal impeller external diameter.
9, asymmetric air inlet centrifugal blower according to claim 8 is characterized in that: the external diameter of motor side centrifugal impeller is 1.5 times of motor offside centrifugal impeller external diameter.
10, according to claim 1, the two air inlet centrifugal blowers of 2 or 3 described asymmetrics, it is characterized in that: suction port is cone barrel type, arc tubular or is arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03247394 CN2627252Y (en) | 2003-06-18 | 2003-06-18 | Asymmetric double air intake centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03247394 CN2627252Y (en) | 2003-06-18 | 2003-06-18 | Asymmetric double air intake centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2627252Y true CN2627252Y (en) | 2004-07-21 |
Family
ID=34252374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03247394 Expired - Fee Related CN2627252Y (en) | 2003-06-18 | 2003-06-18 | Asymmetric double air intake centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2627252Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10655640B1 (en) | 2011-10-20 | 2020-05-19 | Lti Holdings, Inc. | Double inlet centrifugal blower with PCB center plate |
-
2003
- 2003-06-18 CN CN 03247394 patent/CN2627252Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10655640B1 (en) | 2011-10-20 | 2020-05-19 | Lti Holdings, Inc. | Double inlet centrifugal blower with PCB center plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |