CN1847668A - Blade unit of centrifugal fan - Google Patents
Blade unit of centrifugal fan Download PDFInfo
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- CN1847668A CN1847668A CN 200510064574 CN200510064574A CN1847668A CN 1847668 A CN1847668 A CN 1847668A CN 200510064574 CN200510064574 CN 200510064574 CN 200510064574 A CN200510064574 A CN 200510064574A CN 1847668 A CN1847668 A CN 1847668A
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- blade
- centrifugal fan
- blade part
- wheel hub
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Abstract
The present invention relates to blade unit of centrifugal fan. The blade unit includes at least one hub and several blades stretching outwards from the hub. Each of the blades has one first blade part and one second blade part axially set to avoid inverse overflow of the fluid through the inlet.
Description
Technical field
The present invention relates to a kind of blade unit of centrifugal fan, relate in particular to a kind of blade unit of centrifugal fan of heat radiation.
Background technique
Progress along with science and technology, product also develops towards high-performance, high frequency, high-speed and lightening direction gradually, and chip size is microminiaturized gradually, cause the heat generation density of electrical assembly more and more higher, and the electronic product that moves under the condition of high temperature is easy to generate wild effect, becomes one of present research and development of products key of success so can heat properly be got rid of.
In the past, because the computer heating value is little, less demanding to radiation system.Present COMPUTER CALCULATION speeds up, powerful, for solving the problem of electrical assembly heat radiation effectively, and then the heat that electrical assembly produces taken out of to the casing outside, usually, some cooling mechanisms are installed additional in portion within it, and for example thermopipette (thermosyphon), heat pipe (heat pipe) and radiating fin (heat sink) etc. help electrical assembly and entire system heat radiation.But when considering that economic benefit and heat sinking function have both, can be accepted by general user by fan (fan) the collocation radiation system that radiating fin constituted.Blast fan drives via power plant and converts electrical energy into mechanical energy, energy causes gas flow by the transmission of blade, in order to increasing the convection coefficient in the space, and utilize variation in pressure and speed to increase flowing of being produced, directly heat is taken away and reached the purpose of heat radiation from radiating fin.But in order to promote the heat dissipating capacity of radiation system in limited usage space, the design of fan just becomes important research project.
And general the most often use the fan in heat radiation to be axial flow and centrifugal two kinds, wherein, its gas flow direction of centrifugal fan is radially, or square with the axis.During wheel rotation, gas is entered by the impeller center, by the action of centrifugal force acquisition energy of gas itself.Because gas is to do radial outflow along blade, so the shape of blade can influence the performance of whole blower fan, so afterwards flexure type, (b) radial mode reach (c) three kinds on front curve type etc. can be divided into (a) according to the form of its blade.Centrifugal fan is because blast is higher, so be usually used in the bigger system of resistance, again because the flow field in the centrifugal fan is very complicated, after fluid enters the impeller center, turn round radially with impeller, so fluid can produce the phenomenon of reflux (recirculation), adverse current (reversed flow) and fluid breakdown (separation) in impeller, makes that the flow field in the impeller becomes complicated.Therefore, how improving these problems, is the target that present research institute pays attention to promote radiating effect.
See also Fig. 1, Fig. 2, it is depicted as the blade structure of general known centrifugal fan, as shown in the figure, its have a wheel hub 11 and a plurality of around the wheel hub 11 outward extending flabellum 12.These flabellums 12 are to be formed at around the wheel hub radially, and being changed in the radial direction at these flabellums 12.For example these flabellums 12 are near a side of wheel hub 11, and this flabellum is flat (as Fig. 1); Perhaps to the end near the outside, fully court radially bends (as Fig. 2) to these flabellums 12 by an end of wheel hub 11.
See also Fig. 3,4,5, it is depicted as this fan and is hubbed at the interior schematic representation of housing.As shown in the figure, this fan includes a upper shell 13 and a lower shell body 14, wherein offer one first open-work 131 on the surface of this upper shell 13, offer one second open-work 141 on the surface of this lower shell body 14, and this upper shell 13 and lower shell body 14 capable of being combined being integral, and and then define a snail type runner 15 to be installed with this wheel hub 11 and these flabellums 12, and a side of this upper shell 13 and lower shell body 14 is formed with an outlet 16 and is communicated with this snail type runner 15, when this wheel hub 11 and 12 rotations of these flabellums, and then suction fluid, promptly this fluid is entered by first open-work 131 and second open-work 141 respectively, and the power of rotation makes the suitable flabellum 12 of fluid after external radiation, blows out towards outlet 16 along this snail type runner 15 again.
The axial direction of above-mentioned these flabellums 12 is a lineal shape, be identical at first open- work 131 and 141 blast that can produce of second open-work when sucking fluid.But, in practical application, have problem: when this fluid is flowed into by first open-work 131 and second open-work 141, because the inflow condition difference (for example second open-work, 141 places are provided with a plurality of ribs) of first open-work 131 and second open-work 141, when the resistance that exports 16 places is slightly high, fluid can not flowed out by outlet 16 fully, and these some fluids of failing to flow out can be gone out by first open-work 131 or second open-work, 141 adverse currents, so not only reduce the Fluid Volume of the inflow at first open-work 131 or second open-work, 141 places, and the fluid of adverse current also can produce bump and the noise of increase fan with the fluid that flows into.
Summary of the invention
For effectively addressing the above problem, main purpose of the present invention provide a kind of at the wheel hub peripheral shaft to a plurality of one first flabellums and one second flabellum are set, with the feed pressure of inflow place of control different fluid, and then be added to air quantity and reduce noise.
In order to realize above-mentioned purpose, the blade unit of centrifugal fan of the present invention, at least include a wheel hub and a plurality of this wheel hub flabellum on every side that is connected in, it has one first blade part and one second blade part, this first blade part is with second blade part and is not connected shape, and this first blade and second blade are axial setting.
Another design of this case is to include a wheel hub and a plurality of this wheel hub flabellum on every side that is connected at least, and it has one first blade part and one second blade part, and this first blade part is with second blade part and is connected shape, and this first blade and second blade are axial setting.
Description of drawings
Characteristic on above-mentioned purpose of the present invention and structure thereof and the function will describe according to the preferred embodiment of accompanying drawing, thereby can more in depth understand.
Fig. 1 is first kind of blade structure schematic representation of general known centrifugal fan;
Fig. 2 is second kind of blade structure schematic representation of general known centrifugal fan;
Fig. 3 is applied to the decomposing schematic representation in the lower shell body on for general known centrifugal fan;
Fig. 4 is applied to the combination of the solid in lower shell body schematic representation on for general known centrifugal fan;
Fig. 5 is the cross-sectional schematic of Fig. 4;
Fig. 6 is the schematic perspective view of the present invention's first preferred embodiment;
Fig. 7 is the schematic top plan view of the present invention's first preferred embodiment;
Fig. 8 is applied to the decomposing schematic representation of lower shell body for the present invention's first preferred embodiment;
Fig. 9 is applied to the combination schematic representation of lower shell body for the present invention's first preferred embodiment;
Figure 10 is applied to the cross-sectional schematic of lower shell body for the present invention's first preferred embodiment;
Figure 11 is the schematic top plan view of another form of first blade part of the present invention's first preferred embodiment and second blade part;
Figure 12 is first blade part of the present invention's first preferred embodiment and the schematic top plan view of a form again of second blade part;
Figure 13 is the schematic perspective view of the present invention's second preferred embodiment;
Figure 14 is first blade part of the present invention's second preferred embodiment and the cross-sectional schematic of second blade part;
Figure 15 is the cross-sectional schematic of another form of first blade part of the present invention's second preferred embodiment and second blade part;
Figure 16 is first blade part of the present invention's second preferred embodiment and the cross-sectional schematic of a form again of second blade part;
Figure 17 is the schematic perspective view of the present invention's the 3rd preferred embodiment;
Figure 18 is the schematic top plan view of the present invention's the 3rd preferred embodiment.
Among the figure:
11 wheel hubs, 12 flabellums
13 upper shells, 131 first open-works
14 lower shell bodys, 141 second open-works
16 outlets of 15 volute runners
21 wheel hubs, 22 flabellums
221 roots, 222 first blade parts
223 second blade parts, 23 upper shells
231 first open-works, 24 lower shell bodys
241 second open-works, 25 volute runners
26 outlets, 32 flabellums
321 roots, 322 first blade parts
323 second blade parts, 42 flabellums
421 roots, 422 first blade parts
423 second blade parts
Embodiment
The invention provides a kind of blade unit of centrifugal fan.See also Fig. 6,7, it is depicted as the present invention's first preferred embodiment.As shown in the figure, the blade unit of this centrifugal fan includes wheel hub 21 and a plurality of flabellum 22.These flabellums 22 are connected in around this wheel hub 21, and each flabellum 22 has a root 221 and one first blade part 222, one second blade part 223.One end of root 221 is connected in around the wheel hub 21, and the other end outwards extends the first flabellum portion 222 and the second blade and blade portion 223 of being provided with respectively.In this preferred embodiment, the quantity of this first blade part 222 and second blade part 223 is identical and be vertically and do not connect the shape setting, promptly first blade part 222 and second blade part 223 are upper-lower position relation and arrange and be provided with, and this first blade part 222 radially bend direction and bend angle different with this second blade part 223.As shown in Figure 7, this first blade part 222 is formed between second blade part of these second blade parts 223 and vicinity, promptly is forked.
Please continue to consult Fig. 8,9,10, it is depicted as the present invention and is hubbed at the interior schematic representation of housing.As shown in the figure, include a upper shell 23 and a lower shell body 24, wherein offer one first open-work 231 on the surface of this upper shell 23, offer one second open-work 241 on the surface of this lower shell body 24.Upper shell 23 and lower shell body 24 capable of being combined being integral, and then define a volute runner 25 to be installed with this wheel hub 21 and these flabellums 22.One side of upper shell 23 and lower shell body 24 is formed with an outlet 26 and is communicated with this volute runner 25.When this wheel hub 21 and 22 rotations of these flabellums, and then suction fluid, this fluid is entered by first open-work 231 and second open-work 241 respectively, behind the runner between each flabellum 22 in these a plurality of flabellums 22 and the contiguous flabellum 22, utilize the power of rotation make fluid along each flabellum 22 to external radiation, blow out towards outlet along this volute runner 25 again.When fluid flows between flabellum 22 and the flabellum 22 by first open-work 231 and second open-work 241 respectively, first blade part 222 and 223 one-tenth axial upper and lower settings of second blade part by this flabellum 22, and this first blade part 222 is formed between second blade part of these second blade parts 223 and vicinity, make and to prevent to increase the segment fluid flow that causes between each runner and produce adverse current and flow out towards first open-work 231 or second open-work 241 because of exporting 26 impedance, thereby improve in the known technology and to overflow the fluid flow that causes because of fluid countercurrent current and reduce, and have minimizing produces noise because of the fluid impact of the fluid of adverse current and inflow characteristic.
In addition, described first blade part 222 and second blade part 223, its quantity can (as shown in figure 11) inequality, its thickness can identical or inequality (no icon), and its direction that radially bends (as shown in figure 12) and angle (no icon) can be identical, equally also can reach above-mentioned effect and effect.
See also Figure 13,14,15,16, it is depicted as second preferred embodiment of the present invention.As shown in the figure, its overall structure is roughly identical with last embodiment with function and mode of execution, does not repeat to introduce identical structure, effect and label at this.Its difference is that root 321 outward extending each first blade part 322 and second blade part 323 of these a plurality of flabellums 32 are the connection shape in this preferred embodiment.
In addition, the sectional view of this first blade part 322 and second blade part 323 can be two opposite triangular shaft and to connecting (as shown in figure 15) is set, or be that two opposite arc shafts are provided with (as shown in figure 16) to connecting, thereby can realize above-mentioned effect and effect.
See also Figure 17,18, it is depicted as the present invention's the 3rd preferred embodiment.As shown in the figure, its overall structure is roughly identical with preceding two embodiments with function and mode of execution, does not repeat to introduce identical, effect and label at this.Its difference is that root 421 outward extending first blade parts 422 of these a plurality of flabellums 42 and second blade part 423 are the connection shape for part, and part is and does not connect shape and forked, also can realize above-mentioned
Embodiment's effect and effect.
The above only is a preferable possible embodiments of the present invention, and all variations that utilizes said method of the present invention, shape, structure, device to do all should be contained within the application's the protection domain.
Claims (13)
1. the blade unit of a centrifugal fan is characterized in that, comprises at least:
One wheel hub;
A plurality of flabellums are connected in around this wheel hub, and it has one first blade part and one second blade part, and this first blade part is with second blade part and is not connected shape.
2. the blade unit of centrifugal fan as claimed in claim 1 is characterized in that, wherein this first blade and second blade are axial setting.
3. the blade unit of centrifugal fan as claimed in claim 1 or 2 is characterized in that, wherein the quantity of this first blade and second blade is identical or inequality.
4. the blade unit of centrifugal fan as claimed in claim 1 or 2 is characterized in that, wherein the thickness of this first blade and second blade is identical or inequality.
5. the blade unit of centrifugal fan as claimed in claim 1 or 2 is characterized in that, wherein this first blade and second blade to radially bend angle be identical or it is inequality to be angle.
6. the blade unit of centrifugal fan as claimed in claim 1 or 2 is characterized in that, wherein this first blade and second blade radially bends the direction difference or be the same radial bending direction.
7. the blade unit of a centrifugal fan is characterized in that, comprises at least:
One wheel hub;
A plurality of flabellums are connected in around this wheel hub, and it has one first blade part and one second blade part, and this first blade part is with second blade part and is connected shape.
8. the blade unit of centrifugal fan as claimed in claim 7 is characterized in that, wherein this first blade and second blade are axial setting.
9. as the blade unit of claim 7 or 8 described centrifugal fans, it is characterized in that wherein the quantity of this first blade and second blade is identical or be quantity inequality.
10. as the blade unit of claim 7 or 8 described centrifugal fans, it is characterized in that wherein the thickness of this first blade and second blade is identical or be thickness inequality.
11. the blade unit as claim 7 or 8 described centrifugal fans is characterized in that, wherein the degree of radially bending of this first blade and second blade is identical or be inequality.
12. the blade unit as claim 7 or 8 described centrifugal fans is characterized in that, wherein this first blade and second blade to radially bend direction different or identical.
13. the blade unit of a centrifugal fan is characterized in that, comprises at least:
One wheel hub;
A plurality of flabellums are connected in around this wheel hub, and it has one first blade part and one second blade part, and this first blade part is arranged to partly be connected shape and partly be with second blade part and is not connected shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510064574 CN1847668A (en) | 2005-04-15 | 2005-04-15 | Blade unit of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510064574 CN1847668A (en) | 2005-04-15 | 2005-04-15 | Blade unit of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1847668A true CN1847668A (en) | 2006-10-18 |
Family
ID=37077355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510064574 Pending CN1847668A (en) | 2005-04-15 | 2005-04-15 | Blade unit of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1847668A (en) |
-
2005
- 2005-04-15 CN CN 200510064574 patent/CN1847668A/en active Pending
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