CN2408278Y - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
- Publication number
- CN2408278Y CN2408278Y CN 00227275 CN00227275U CN2408278Y CN 2408278 Y CN2408278 Y CN 2408278Y CN 00227275 CN00227275 CN 00227275 CN 00227275 U CN00227275 U CN 00227275U CN 2408278 Y CN2408278 Y CN 2408278Y
- Authority
- CN
- China
- Prior art keywords
- casing
- air
- worm gear
- blade
- air door
- 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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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a novel centrifugal fan, which comprises a snailed casing, an electromotor fixedly connected with the casing and an air draft device arranged in the casing, wherein, an air door and an air outlet are arranged on the casing, an air inlet is arranged on the air door, and the electromotor drives the air draft device. The utility model is characterized in that the air draft device is a worm wheel, leaf blades of the worm wheel are composed of long leaf blades and short leaf blades, and the long leaf blades and the short leaf blades are equidistantly and alternately arranged on the circumference of a soleplate of the worm wheel; an air outlet passage is formed between an air outlet of the leaf blade and the casing and is communicated with the air outlet of the casing, and an air suction opening of the worm wheel is opposite to the air inlet of the air door. The utility model enhances the pressure of ejective gas and has the advantages of cabinet and shapely appearance, simple structure and low price.
Description
The utility model relates to a kind of novel centrifugal blower fan.
The present centrifugal blower that uses, generally by casing, be located at the blower fan that impeller in the casing and impeller are rotated.It is the rotation by impeller, and the gas that sucks is improved pressure, sprays from exhaust outlet again; The gas pressure of its ejection is lower, and it self volume ratio is bigger and heavy.
The purpose of this utility model provides and a kind ofly can spray the big gas of pressure, little, the lightweight centrifugal blower of volume.
In order to achieve the above object, the utility model is achieved in that it comprises casing, the motor of fixedlying connected with casing of volute and is located at the interior extractor fan of casing; On casing, be provided with air door and exhaust outlet, on air door, be provided with wind inlet; The driven by motor extractor fan; It is characterized in that: this extractor fan is a worm gear, and the blade of worm gear is made up of linear leaf and short blade, on the alternate circumference that is arranged in the worm gear base plate of their equidistant length; Form the air-out passage between the exhaust outlet of blade and the casing, this air-out passage is communicated with the exhaust outlet of casing; The worm gear air sucking mouth is facing to the wind inlet of air door.It is arc that wormwheel blade all is, its radian unanimity.Vertical equidistant of every blade is located on the circumference of worm gear wheel plate, and the circle edge of they and wheel plate has an angle: 110 °≤α≤155 °.Above-mentioned angle α is 125 °.
The utility model compared with prior art has following advantage:
1, improved the pressure of ejection gas;
2, profile is small and exquisite, attractive in appearance, and is in light weight;
3, simple in structure, low price.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
Below in conjunction with drawings and Examples the utility model is done further detailed description:
As shown in Figure 1, 2, comprise casing (8), the motor (9) of fixedlying connected of volute and be located at worm gear in the casing (8) with casing (8); On casing (8), be provided with air door (1) and exhaust outlet (8-1), on air door (1), be provided with wind inlet (1-1); The rotating shaft (6) of motor (9) is connected by key (5) with the wheel hub (4) of worm gear, and motor (9) drives worm gear; The blade of worm gear (3) is made up of linear leaf and short blade, and on the alternate circumference that is arranged in worm gear base plate (7) of their equidistant length, wormwheel blade (3) all is arc, its radian unanimity, and it is 125 ° that the circle edge of they and wheel plate (7) has an angle α.Form air-out passage (10) between the exhaust outlet of blade (3) and the casing (8), this air-out passage (10) is communicated with the exhaust outlet (8-1) of casing (8); The worm gear air sucking mouth is facing to the wind inlet (1-1) of air door (1).During work, connect power supply, the worm gear rotation sucks wind from wind inlet, spray from exhaust outlet.
Claims (4)
1, a kind of novel centrifugal blower fan comprises casing, the motor of fixedlying connected with casing of volute and is located at the interior extractor fan of casing; On casing, be provided with air door and exhaust outlet, on air door, be provided with wind inlet; The driven by motor extractor fan; It is characterized in that: this extractor fan is a worm gear, and the blade of worm gear (3) is made up of linear leaf and short blade, on the alternate circumference that is arranged in worm gear base plate (7) of their equidistant length; Form air-out passage (10) between the exhaust outlet of blade (3) and the casing (8), this air-out passage (10) is communicated with the exhaust outlet (8-1) of casing (8); The worm gear air sucking mouth is facing to the wind inlet (1-1) of air door (1).
2, novel centrifugal blower fan according to claim 1 is characterized in that: wormwheel blade (3) all is arc, its radian unanimity.
3, novel centrifugal blower fan according to claim 1 and 2 is characterized in that: vertical equidistant of every blade (3) is located on the circumference of worm gear wheel plate (7), and the circle edge of they and wheel plate (7) has an angle: 110 °≤α≤155 °.
4, novel centrifugal blower fan according to claim 3 is characterized in that: above-mentioned angle α is 125 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00227275 CN2408278Y (en) | 2000-01-27 | 2000-01-27 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00227275 CN2408278Y (en) | 2000-01-27 | 2000-01-27 | Centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2408278Y true CN2408278Y (en) | 2000-11-29 |
Family
ID=33590945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00227275 Expired - Fee Related CN2408278Y (en) | 2000-01-27 | 2000-01-27 | Centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2408278Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340776C (en) * | 2004-07-19 | 2007-10-03 | 吴伟 | Low noise high pressure centrifugal fan |
| CN103277326A (en) * | 2013-06-04 | 2013-09-04 | 上海布威重工机械有限公司 | Multi-vane fan |
| CN108278222A (en) * | 2018-01-11 | 2018-07-13 | 袁芳革 | Fume chamber exhaust fan |
-
2000
- 2000-01-27 CN CN 00227275 patent/CN2408278Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340776C (en) * | 2004-07-19 | 2007-10-03 | 吴伟 | Low noise high pressure centrifugal fan |
| CN103277326A (en) * | 2013-06-04 | 2013-09-04 | 上海布威重工机械有限公司 | Multi-vane fan |
| CN108278222A (en) * | 2018-01-11 | 2018-07-13 | 袁芳革 | Fume chamber exhaust fan |
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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 |