US20120315134A1 - Fan impeller structure - Google Patents
Fan impeller structure Download PDFInfo
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- US20120315134A1 US20120315134A1 US13/159,364 US201113159364A US2012315134A1 US 20120315134 A1 US20120315134 A1 US 20120315134A1 US 201113159364 A US201113159364 A US 201113159364A US 2012315134 A1 US2012315134 A1 US 2012315134A1
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- fan impeller
- impeller structure
- wind inlet
- blades
- blade
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/203—Cooling means for portable computers, e.g. for laptops
Definitions
- the present invention relates generally to a fan impeller structure, and more particularly to an improved fan impeller structure, which has higher wind pressure and higher wind intensity to provide excellent heat dissipation effect.
- the thickness of the laptop is thinner and thinner. Consequently, due to limitation of the space, the heat generated by the electronic components inside the laptop, such as the central processing unit (CPU) and south/north bridge chipset, can be hardly efficiently dissipated. In this case, the heat will accumulate to cause a rise of temperature.
- CPU central processing unit
- south/north bridge chipset the heat generated by the electronic components inside the laptop
- a thin-type fan or so-called blower
- blower is directly disposed on the CPU to forcedly quickly dissipate the heat generated by the CPU to external environment so as to keep the CPU normally working at high speed.
- FIG. 1A is a perspective assembled view of a conventional blower.
- FIG. 1B is perspective exploded view of the conventional blower.
- FIG. 1C is sectional view of the conventional blower.
- the blower includes a frame body 10 , a cover body 12 and an impeller 14 .
- the frame body 10 has a receiving space 101 for receiving the impeller 14 .
- the frame body 10 further has a wind outlet 103 through which the air is exhausted from the receiving space 101 .
- the impeller 14 has multiple blades 141 annularly arranged on the circumference of the impeller 14 .
- the impeller 14 is rotatably disposed in the receiving space 101 .
- the cover body 12 has a wind inlet 121 in communication with the receiving space 101 .
- the cover body 12 is mated with the frame body 10 to form the blower.
- the impeller 14 When the impeller 14 operates, the external air is sucked through the wind inlet 121 into the receiving space 101 to create an axial flow 15 between the impeller 14 and the blades 141 . Under the centrifugal force of the impeller 14 , the axial flow 15 is converted into a radial flow 16 . The radial flow 16 is guided by the blades 141 to flow out from the wind outlet 103 so as to dissipate heat.
- the heat dissipation effect of the conventional blower is poor. This is because there is a gap 17 between the cover body 12 and the blades 141 in the receiving space 101 .
- the radial flow 16 is likely to partially escape from the wind inlet 121 through the gap 17 .
- the wind pressure and wind intensity exhausted from the blower will apparently decrease. That is, the conventional blower can hardly provide sufficient wind pressure and wind intensity. Therefore, the heat dissipation effect provided by the conventional blower is poor.
- the conventional blower has the following shortcomings:
- the conventional blower can hardly provide sufficient wind pressure and wind intensity.
- the radial flow is likely to partially escape from the wind inlet through the gap between the cover body and the blades in the receiving space.
- a primary object of the present invention is to provide an improved fan impeller structure, which has enhanced wind pressure and wind intensity.
- a further object of the present invention is to provide the above fan impeller structure, which is able to provide excellent heat dissipation effect.
- the fan impeller structure of the present invention includes a frame body, a cover body and a hub.
- the frame body has a receiving space.
- the cover body has a wind inlet in communication with the receiving space.
- the hub is rotatably disposed in the receiving space and has multiple blades annularly arranged on a circumference of the hub. Each blade has a top end and a bottom end. The top end has a projection extending from the top end toward the cover body. An axial space is defined between the blades and the hub. The projections formed at the top ends of the blades are able to effectively prevent the air flowing within the receiving space from escaping. Accordingly, the wind pressure and wind intensity are enhanced to achieve an excellent heat dissipation effect.
- FIG. 1A is a perspective assembled view of a conventional blower
- FIG. 1B is perspective exploded view of the conventional blower
- FIG. 1C is sectional assembled view of the conventional blower
- FIG. 2A is a perspective assembled view of a first embodiment of the present invention
- FIG. 2B is a perspective exploded view of the first embodiment of the present invention.
- FIG. 3A is another perspective assembled view of the first embodiment of the present invention.
- FIG. 3B is another perspective exploded view of the first embodiment of the present invention.
- FIG. 4A is a sectional assembled view of the first embodiment of the present invention in a first aspect
- FIG. 4B is a sectional assembled view of the first embodiment of the present invention in a second aspect
- FIG. 4C is a sectional assembled view of the first embodiment of the present invention in a third aspect
- FIG. 5A is a perspective view of the hub of the present invention.
- FIG. 5B is a perspective view of another hub of the present invention.
- FIG. 6 is a perspective exploded view of a second embodiment of the present invention.
- FIG. 6A is a sectional assembled view of the second embodiment of the present invention in a first aspect
- FIG. 6B is a sectional assembled view of the second embodiment of the present invention in a second aspect
- FIG. 7A is a sectional assembled view of the second embodiment of the present invention in a third aspect
- FIG. 7B is a sectional assembled view of the second embodiment of the present invention in a fourth aspect
- FIG. 8A is a sectional assembled view of the second embodiment of the present invention in a fifth aspect
- FIG. 8B is a sectional assembled view of the second embodiment of the present invention in a sixth aspect.
- FIG. 9 is a wind pressure versus wind intensity curve diagram of the present invention and the conventional blower.
- the fan impeller structure of the present invention includes a frame body 2 , a cover body 3 and a hub 4 .
- the frame body 2 has a receiving space 20 for receiving the hub 4 .
- the frame body 2 further has a wind outlet 22 formed on one side of the frame body 2 in communication with the receiving space 20 .
- the cover body 3 has a wind inlet 31 in communication with the receiving space 20 .
- the hub 4 is rotatably disposed in the receiving space 20 .
- the hub 4 has multiple blades 41 annularly arranged on the circumference of the hub 4 .
- Each blade 41 has a top end 411 and a bottom end 412 .
- the top end 411 has a projection 42 extending from the top end 411 to the cover body 3 .
- An axial space 5 is defined between the blades 41 and the hub 4 . The air is guided from the wind inlet 31 into the receiving space 20 to form an axial flow 6 within the axial space 5 .
- the projections 42 of the top ends 411 of the blades 41 can be positioned at regular intervals (not shown) or at irregular intervals (as shown in FIGS. 5A and 5B ) or without any interval (as shown in FIGS. 2B and 3B ).
- the projection 42 has three aspects.
- FIGS. 4A and 2B show a first aspect in which the projection 42 has a first extension section 421 protruding from the top end 411 of the blade 41 in adjacency to an inner side of the blade 41 , that is, one side of the blade 41 proximal to the hub 4 .
- the first extension section 421 protrudes into the wind inlet 31 of the cover body 3 .
- the first extension section 421 has a first flow guide side 4211 facing the edge of the wind inlet 31 .
- a first flow way 43 is formed between the first flow guide side 4211 and the edge of the wind inlet 31 in communication with the wind inlet 31 and the receiving space 20 . Slight air is guided from the wind inlet 31 of the cover body 3 through the first flow way 43 into the receiving space 20 .
- each two adjacent blades 41 are interconnected by a connection section 47 .
- the connection section 47 extends between the top ends 411 of the blades 41 in adjacency to the outer sides thereof.
- the connection sections 47 are connected in an annular form.
- FIGS. 3B and 4B show a second aspect in which the projection 42 has a second extension section 423 protruding from the top end 411 of the blade 41 in adjacency to the outer side of the blade 41 .
- the second extension section 423 has a second flow guide side 4231 distal from the wind inlet 31 . Slight air in the wind inlet 31 of the cover body 3 will create slight wind pressure between the second flow guide side 4231 and the wind inlet 31 to help in preventing the air flowing within the receiving space 20 from escaping out of the wind inlet 31 . However, the air in the receiving space 20 is prevented from escaping out of the wind inlet 31 mainly by means of the second extension section 423 .
- each two adjacent blades 41 are interconnected by a connection section 47 in adjacency to the outer sides of the blades 41 .
- the second aspect is different from the first aspect in that the connection sections 47 extend between the top ends 411 of the blades 41 in adjacency to the outer sides of the blades 41 and are connected between the second extension sections 423 of the projections 42 in an annular form.
- FIGS. 4C , 2 B and 3 B show a third aspect, which is a combination of the first and second aspects.
- the projection 42 has a first extension section 421 and a second extension section 423 .
- the first and second extension sections 421 , 423 respectively protrude from the top end 411 of the blade 41 in adjacency to the inner and outer sides of the blade 41 .
- the first and second extension sections 421 , 423 are substantially identical to the first and second aspects in structure, connection relationship and effect and thus will not be repeatedly described hereinafter.
- the third aspect is mainly different from the first and second aspects in that the first and second extension sections 421 , 423 together define a substantially U-shaped stop space 46 in communication with the first flow way 43 and the wind inlet 31 .
- the first and second extension sections 421 , 423 serve to prevent the air flowing within the receiving space 20 from escaping out of the wind inlet 31 .
- connection sections 47 of the third aspect are arranged in positions identical to that of the second aspect and thus will not be further described hereinafter.
- FIG. 9 is a wind pressure versus wind intensity curve diagram of the present invention and the conventional blower. It can be known from the diagram that the wind pressure versus wind intensity curve T 2 of the present invention is obviously higher than the wind pressure versus wind intensity curve T 1 of the conventional blower so that the wind pressure and wind intensity of the present invention are greatly increased.
- a flow guide passage 414 is defined between each two adjacent blades 41 in communication with the axial space 5 and the receiving space 20 for guiding in the axial flow 6 flowing within the axial space 5 .
- FIGS. 2A , 2 B and 4 A Please refer to FIGS. 2A , 2 B and 4 A.
- the external air is sucked through the wind inlet 31 of the cover body 3 into the axial space 5 .
- Slight air in the wind inlet 31 is guided through the first flow way 43 into the receiving space 20 to restrain the air in the receiving space 20 from escaping out of the receiving space 20 .
- the axial flow 6 flowing within the axial space 5 is converted into a radial flow 7 under the centrifugal force of the rotating hub 4 .
- the radial flow 7 is thrown out through the flow guide passages 414 between the blades 41 and eventually exhausted from the receiving space 20 through the wind outlet 22 . This can effectively enhance the wind pressure and wind intensity as a whole so as to achieve an excellent heat dissipation effect.
- FIGS. 6 and 6A show a second embodiment of the present invention.
- the second embodiment is substantially identical to the first embodiment in structure, connection relationship and effect.
- the second embodiment is only different from the first embodiment in that the cover body 3 has a lip section 32 formed along the edge of the wind inlet 31 of the cover body 3 opposite to the projections 42 . That is, the lip section 32 extends along the edge of the wind inlet 31 and protrudes from the edge toward the receiving space 20 .
- the lip section 32 has a first end face 321 facing the hub 4 and a second end face 322 opposite to the first end face 321 .
- the projection 42 has six aspects.
- FIGS. 6A and 6 show the first aspect.
- the lip section 32 substantially is in the form of a hook or has a bent form.
- the projection 42 substantially has a trapezoid form.
- the projection 42 has a first extension section 421 protruding from the top end 411 of the blade 41 in adjacency to an inner side of the blade 41 , that is, one side of the blade 41 proximal to the hub 4 .
- the first extension section 421 protrudes into the wind inlet 31 of the cover body 3 .
- the first extension section 421 has a first flow guide side 4211 facing the first end face 321 .
- a first flow way 43 is formed between the first flow guide side 4211 and the first end face 321 in communication with the wind inlet 31 and the receiving space 20 .
- the first flow way 43 has an arcuate form. Slight air is guided from the wind inlet 31 of the cover body 3 through the first flow way 43 into the receiving space 20 .
- each two adjacent blades 41 are interconnected by a connection section 47 .
- the connection section 47 extends between the top ends 411 of the blades 41 in adjacency to the outer sides thereof.
- the connection sections 47 are connected in an annular form.
- FIG. 6B is a sectional view of a second aspect.
- the second aspect is only different from the first aspect in that in the second aspect, the lip section 32 and the projection 42 of the first aspect are substantially changed into an inclined form.
- FIGS. 6 and 7A show a third aspect in which the lip section 32 substantially is in the form of a hook or has a bent form and the projection 42 substantially has the form of a strip.
- the projection 42 has a second extension section 423 protruding from the top end 411 of the blade 41 in adjacency to the outer side of the blade 41 .
- the second extension section 423 has a second flow guide side 4231 facing the second end face 322 of the lip section 32 .
- a second flow way 44 is formed between the second flow guide side 4231 and the second end face 322 .
- the second flow way 44 is substantially L-shaped in communication with the wind inlet 31 and the receiving space 20 .
- Slight air in the wind inlet 31 of the cover body 3 is indirectly guided by the second flow guide side 4231 into the second flow way 44 so as to create slight wind pressure in the second flow way 44 to help in preventing the air flowing within the receiving space 20 from escaping out of the wind inlet 31 .
- the air in the receiving space 20 is prevented from escaping out of the wind inlet 31 mainly by means of the second extension section 423 .
- each two adjacent blades 41 are interconnected by a connection section 47 in adjacency to the outer sides of the blades 41 .
- the third aspect is different from the second aspect in that the connection sections 47 extend between the top ends 411 of the blades 41 in adjacency to the outer sides of the blades 41 and are connected between the second extension sections 423 of the projections 42 in an annular form.
- FIG. 7B is a sectional view of a fourth aspect.
- the fourth aspect is only different from the third aspect in that in the fourth aspect, the lip section 32 and the projection 42 of the third aspect are substantially changed into an inclined form.
- FIGS. 6 and 8A show a fifth aspect, which is a combination of the first and third aspects.
- the lip section 32 substantially is in the form of a hook or has a bent form.
- the projection 42 has a first extension section 421 substantially in a trapezoid form and a second extension section 423 substantially in the form of a strip.
- the first and second extension sections 421 , 423 respectively protrude from the top end 411 of the blade 41 in adjacency to the inner and outer sides of the blade 41 .
- the first and second extension sections 421 , 423 of the fifth aspect are substantially identical to the first and third aspects in structure, connection relationship and effect and thus will not be repeatedly described hereinafter.
- the fifth aspect is mainly different from the first and third aspects in that the first and second extension sections 421 , 423 together define a substantially U-shaped stop space 46 in communication with the first flow way 43 , the second flow way 44 and the wind inlet 31 . Slight air in the wind inlet 31 of the cover body 3 is guided through the first flow way 43 into the stop space 46 and the second flow way 44 , whereby slight wind pressure is created in the stop space 46 and the second flow way 44 to restrain the air in the receiving space 20 from escaping out of the receiving space 20 .
- the first and second extension sections 421 , 423 serve to prevent the air flowing within the receiving space 20 from escaping out of the wind inlet 31 .
- connection sections 47 of the fifth aspect are arranged in positions identical to that of the third aspect and thus will not be further described hereinafter.
- FIG. 8B is a sectional view of a sixth aspect.
- the sixth aspect is only different from the fifth aspect in that in the sixth aspect, the lip section 32 and the first and second extension sections 421 , 423 of the projection 42 of the fifth aspect are substantially changed into an inclined form.
- the configurations of the lip section 32 and the projection 42 are not limited to the above six aspects.
- the lip section 32 can be designed with a configuration adapted to or not adapted to that of the projection 42 as necessary to achieve the purpose of preventing the air in the receiving space 20 from escaping.
- the frame body 2 , the cover body 3 and the hub 4 with the blades 41 having the projections 42 are assembled to achieve the purpose of preventing the air in the receiving space 20 from escaping. Accordingly, the wind pressure and wind intensity are effectively enhanced to achieve an excellent heat dissipation effect.
- the present invention has the following advantages:
Abstract
A fan impeller structure includes a frame body, a cover body and a hub. The frame body has a receiving space. The cover body has a wind inlet in communication with the receiving space. The hub is rotatably disposed in the receiving space and has multiple blades annularly arranged on a circumference of the hub. Each blade has a top end and a bottom end. The top end has a projection extending from the top end toward the cover body. An axial space is defined between the blades and the hub. The projections formed at the top ends of the blades are able to effectively prevent the air flowing within the receiving space from escaping. Accordingly, the wind pressure and wind intensity are enhanced to achieve an excellent heat dissipation effect.
Description
- 1. Field of the Invention
- The present invention relates generally to a fan impeller structure, and more particularly to an improved fan impeller structure, which has higher wind pressure and higher wind intensity to provide excellent heat dissipation effect.
- 2. Description of the Related Art
- Following the rapid advance of electronic and information technologies, all kinds of electronic products (such as desktop computers and laptops) have been more and more popularly used and widely applied to various fields. There is a trend to miniaturize the size and thin the thickness of the electronic products.
- As exemplified with a laptop, the thickness of the laptop is thinner and thinner. Consequently, due to limitation of the space, the heat generated by the electronic components inside the laptop, such as the central processing unit (CPU) and south/north bridge chipset, can be hardly efficiently dissipated. In this case, the heat will accumulate to cause a rise of temperature.
- In order to avoid temporary or permanent failure of the laptop due to overheating of the CPU, conventionally, a thin-type fan (or so-called blower) is directly disposed on the CPU to forcedly quickly dissipate the heat generated by the CPU to external environment so as to keep the CPU normally working at high speed.
- Please refer to
FIGS. 1A , 1B and 1C.FIG. 1A is a perspective assembled view of a conventional blower.FIG. 1B is perspective exploded view of the conventional blower.FIG. 1C is sectional view of the conventional blower. The blower includes aframe body 10, acover body 12 and animpeller 14. Theframe body 10 has areceiving space 101 for receiving theimpeller 14. Theframe body 10 further has awind outlet 103 through which the air is exhausted from thereceiving space 101. - Please refer to
FIGS. 1B and 1C . Theimpeller 14 hasmultiple blades 141 annularly arranged on the circumference of theimpeller 14. Theimpeller 14 is rotatably disposed in thereceiving space 101. Thecover body 12 has awind inlet 121 in communication with thereceiving space 101. Thecover body 12 is mated with theframe body 10 to form the blower. - When the
impeller 14 operates, the external air is sucked through thewind inlet 121 into thereceiving space 101 to create anaxial flow 15 between theimpeller 14 and theblades 141. Under the centrifugal force of theimpeller 14, theaxial flow 15 is converted into aradial flow 16. Theradial flow 16 is guided by theblades 141 to flow out from thewind outlet 103 so as to dissipate heat. - The heat dissipation effect of the conventional blower is poor. This is because there is a
gap 17 between thecover body 12 and theblades 141 in thereceiving space 101. Theradial flow 16 is likely to partially escape from thewind inlet 121 through thegap 17. This leads to pressure relief phenomenon (or so-called wind leak phenomenon). As a result, the wind pressure and wind intensity exhausted from the blower will apparently decrease. That is, the conventional blower can hardly provide sufficient wind pressure and wind intensity. Therefore, the heat dissipation effect provided by the conventional blower is poor. According to the above, the conventional blower has the following shortcomings: - 1. The conventional blower can hardly provide sufficient wind pressure and wind intensity.
- 2. The heat dissipation effect provided by the conventional blower is poor.
- 3. The radial flow is likely to partially escape from the wind inlet through the gap between the cover body and the blades in the receiving space.
- A primary object of the present invention is to provide an improved fan impeller structure, which has enhanced wind pressure and wind intensity.
- A further object of the present invention is to provide the above fan impeller structure, which is able to provide excellent heat dissipation effect.
- To achieve the above and other objects, the fan impeller structure of the present invention includes a frame body, a cover body and a hub. The frame body has a receiving space. The cover body has a wind inlet in communication with the receiving space. The hub is rotatably disposed in the receiving space and has multiple blades annularly arranged on a circumference of the hub. Each blade has a top end and a bottom end. The top end has a projection extending from the top end toward the cover body. An axial space is defined between the blades and the hub. The projections formed at the top ends of the blades are able to effectively prevent the air flowing within the receiving space from escaping. Accordingly, the wind pressure and wind intensity are enhanced to achieve an excellent heat dissipation effect.
- The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
-
FIG. 1A is a perspective assembled view of a conventional blower; -
FIG. 1B is perspective exploded view of the conventional blower; -
FIG. 1C is sectional assembled view of the conventional blower; -
FIG. 2A is a perspective assembled view of a first embodiment of the present invention; -
FIG. 2B is a perspective exploded view of the first embodiment of the present invention; -
FIG. 3A is another perspective assembled view of the first embodiment of the present invention; -
FIG. 3B is another perspective exploded view of the first embodiment of the present invention; -
FIG. 4A is a sectional assembled view of the first embodiment of the present invention in a first aspect; -
FIG. 4B is a sectional assembled view of the first embodiment of the present invention in a second aspect; -
FIG. 4C is a sectional assembled view of the first embodiment of the present invention in a third aspect; -
FIG. 5A is a perspective view of the hub of the present invention; -
FIG. 5B is a perspective view of another hub of the present invention; -
FIG. 6 is a perspective exploded view of a second embodiment of the present invention; -
FIG. 6A is a sectional assembled view of the second embodiment of the present invention in a first aspect; -
FIG. 6B is a sectional assembled view of the second embodiment of the present invention in a second aspect; -
FIG. 7A is a sectional assembled view of the second embodiment of the present invention in a third aspect; -
FIG. 7B is a sectional assembled view of the second embodiment of the present invention in a fourth aspect; -
FIG. 8A is a sectional assembled view of the second embodiment of the present invention in a fifth aspect; -
FIG. 8B is a sectional assembled view of the second embodiment of the present invention in a sixth aspect; and -
FIG. 9 is a wind pressure versus wind intensity curve diagram of the present invention and the conventional blower. - Please refer to
FIGS. 2A , 2B, 3A, 3B, 4A and 4B. According to a first embodiment, the fan impeller structure of the present invention includes aframe body 2, acover body 3 and ahub 4. Theframe body 2 has a receivingspace 20 for receiving thehub 4. Theframe body 2 further has awind outlet 22 formed on one side of theframe body 2 in communication with the receivingspace 20. - The
cover body 3 has awind inlet 31 in communication with the receivingspace 20. Thehub 4 is rotatably disposed in the receivingspace 20. Thehub 4 hasmultiple blades 41 annularly arranged on the circumference of thehub 4. Eachblade 41 has atop end 411 and abottom end 412. Thetop end 411 has aprojection 42 extending from thetop end 411 to thecover body 3. Anaxial space 5 is defined between theblades 41 and thehub 4. The air is guided from thewind inlet 31 into the receivingspace 20 to form anaxial flow 6 within theaxial space 5. - The
projections 42 of the top ends 411 of theblades 41 can be positioned at regular intervals (not shown) or at irregular intervals (as shown inFIGS. 5A and 5B ) or without any interval (as shown inFIGS. 2B and 3B ). Theprojection 42 has three aspects.FIGS. 4A and 2B show a first aspect in which theprojection 42 has afirst extension section 421 protruding from thetop end 411 of theblade 41 in adjacency to an inner side of theblade 41, that is, one side of theblade 41 proximal to thehub 4. Thefirst extension section 421 protrudes into thewind inlet 31 of thecover body 3. - The
first extension section 421 has a firstflow guide side 4211 facing the edge of thewind inlet 31. Afirst flow way 43 is formed between the firstflow guide side 4211 and the edge of thewind inlet 31 in communication with thewind inlet 31 and the receivingspace 20. Slight air is guided from thewind inlet 31 of thecover body 3 through thefirst flow way 43 into the receivingspace 20. - In addition, each two
adjacent blades 41 are interconnected by aconnection section 47. Theconnection section 47 extends between the top ends 411 of theblades 41 in adjacency to the outer sides thereof. Theconnection sections 47 are connected in an annular form. -
FIGS. 3B and 4B show a second aspect in which theprojection 42 has asecond extension section 423 protruding from thetop end 411 of theblade 41 in adjacency to the outer side of theblade 41. Thesecond extension section 423 has a secondflow guide side 4231 distal from thewind inlet 31. Slight air in thewind inlet 31 of thecover body 3 will create slight wind pressure between the secondflow guide side 4231 and thewind inlet 31 to help in preventing the air flowing within the receivingspace 20 from escaping out of thewind inlet 31. However, the air in the receivingspace 20 is prevented from escaping out of thewind inlet 31 mainly by means of thesecond extension section 423. - Similar to the first aspect, in the second aspect, each two
adjacent blades 41 are interconnected by aconnection section 47 in adjacency to the outer sides of theblades 41. The second aspect is different from the first aspect in that theconnection sections 47 extend between the top ends 411 of theblades 41 in adjacency to the outer sides of theblades 41 and are connected between thesecond extension sections 423 of theprojections 42 in an annular form. -
FIGS. 4C , 2B and 3B show a third aspect, which is a combination of the first and second aspects. In the third aspect, theprojection 42 has afirst extension section 421 and asecond extension section 423. The first andsecond extension sections top end 411 of theblade 41 in adjacency to the inner and outer sides of theblade 41. The first andsecond extension sections second extension sections U-shaped stop space 46 in communication with thefirst flow way 43 and thewind inlet 31. Slight air in thewind inlet 31 of thecover body 3 is guided through thefirst flow way 43 into thestop space 46, whereby slight wind pressure is created in thestop space 46 to restrain the air in the receivingspace 20 from escaping out of the receivingspace 20. The first andsecond extension sections space 20 from escaping out of thewind inlet 31. - The
connection sections 47 of the third aspect are arranged in positions identical to that of the second aspect and thus will not be further described hereinafter. - All of the above aspects of
projections 42 can effectively prevent the air flowing within the receivingspace 20 from escaping out of thewind inlet 31. Accordingly, the wind intensity and wind pressure exhausted from thewind outlet 22 are enhanced.FIG. 9 is a wind pressure versus wind intensity curve diagram of the present invention and the conventional blower. It can be known from the diagram that the wind pressure versus wind intensity curve T2 of the present invention is obviously higher than the wind pressure versus wind intensity curve T1 of the conventional blower so that the wind pressure and wind intensity of the present invention are greatly increased. - Moreover, a
flow guide passage 414 is defined between each twoadjacent blades 41 in communication with theaxial space 5 and the receivingspace 20 for guiding in theaxial flow 6 flowing within theaxial space 5. This will be described as follows with the first aspect ofprojection 42 taken as an example: - Please refer to
FIGS. 2A , 2B and 4A. When theblades 41 of thehub 4 operate, the external air is sucked through thewind inlet 31 of thecover body 3 into theaxial space 5. Slight air in thewind inlet 31 is guided through thefirst flow way 43 into the receivingspace 20 to restrain the air in the receivingspace 20 from escaping out of the receivingspace 20. At this time, theaxial flow 6 flowing within theaxial space 5 is converted into aradial flow 7 under the centrifugal force of therotating hub 4. Theradial flow 7 is thrown out through theflow guide passages 414 between theblades 41 and eventually exhausted from the receivingspace 20 through thewind outlet 22. This can effectively enhance the wind pressure and wind intensity as a whole so as to achieve an excellent heat dissipation effect. - Please refer to
FIGS. 6 and 6A , which show a second embodiment of the present invention. The second embodiment is substantially identical to the first embodiment in structure, connection relationship and effect. The second embodiment is only different from the first embodiment in that thecover body 3 has alip section 32 formed along the edge of thewind inlet 31 of thecover body 3 opposite to theprojections 42. That is, thelip section 32 extends along the edge of thewind inlet 31 and protrudes from the edge toward the receivingspace 20. Thelip section 32 has afirst end face 321 facing thehub 4 and asecond end face 322 opposite to thefirst end face 321. - In this embodiment, the
projection 42 has six aspects.FIGS. 6A and 6 show the first aspect. Thelip section 32 substantially is in the form of a hook or has a bent form. Theprojection 42 substantially has a trapezoid form. Theprojection 42 has afirst extension section 421 protruding from thetop end 411 of theblade 41 in adjacency to an inner side of theblade 41, that is, one side of theblade 41 proximal to thehub 4. Thefirst extension section 421 protrudes into thewind inlet 31 of thecover body 3. - The
first extension section 421 has a firstflow guide side 4211 facing thefirst end face 321. Afirst flow way 43 is formed between the firstflow guide side 4211 and thefirst end face 321 in communication with thewind inlet 31 and the receivingspace 20. Thefirst flow way 43 has an arcuate form. Slight air is guided from thewind inlet 31 of thecover body 3 through thefirst flow way 43 into the receivingspace 20. - In addition, each two
adjacent blades 41 are interconnected by aconnection section 47. Theconnection section 47 extends between the top ends 411 of theblades 41 in adjacency to the outer sides thereof. Theconnection sections 47 are connected in an annular form. - Please refer to
FIGS. 6 and 6B .FIG. 6B is a sectional view of a second aspect. The second aspect is only different from the first aspect in that in the second aspect, thelip section 32 and theprojection 42 of the first aspect are substantially changed into an inclined form. -
FIGS. 6 and 7A show a third aspect in which thelip section 32 substantially is in the form of a hook or has a bent form and theprojection 42 substantially has the form of a strip. Theprojection 42 has asecond extension section 423 protruding from thetop end 411 of theblade 41 in adjacency to the outer side of theblade 41. Thesecond extension section 423 has a secondflow guide side 4231 facing thesecond end face 322 of thelip section 32. Asecond flow way 44 is formed between the secondflow guide side 4231 and thesecond end face 322. Thesecond flow way 44 is substantially L-shaped in communication with thewind inlet 31 and the receivingspace 20. Slight air in thewind inlet 31 of thecover body 3 is indirectly guided by the secondflow guide side 4231 into thesecond flow way 44 so as to create slight wind pressure in thesecond flow way 44 to help in preventing the air flowing within the receivingspace 20 from escaping out of thewind inlet 31. However, the air in the receivingspace 20 is prevented from escaping out of thewind inlet 31 mainly by means of thesecond extension section 423. - Similar to the second aspect, in the third aspect, each two
adjacent blades 41 are interconnected by aconnection section 47 in adjacency to the outer sides of theblades 41. The third aspect is different from the second aspect in that theconnection sections 47 extend between the top ends 411 of theblades 41 in adjacency to the outer sides of theblades 41 and are connected between thesecond extension sections 423 of theprojections 42 in an annular form. - Please refer to
FIGS. 6 and 7B .FIG. 7B is a sectional view of a fourth aspect. The fourth aspect is only different from the third aspect in that in the fourth aspect, thelip section 32 and theprojection 42 of the third aspect are substantially changed into an inclined form. -
FIGS. 6 and 8A show a fifth aspect, which is a combination of the first and third aspects. In the fifth aspect, thelip section 32 substantially is in the form of a hook or has a bent form. Theprojection 42 has afirst extension section 421 substantially in a trapezoid form and asecond extension section 423 substantially in the form of a strip. The first andsecond extension sections top end 411 of theblade 41 in adjacency to the inner and outer sides of theblade 41. The first andsecond extension sections second extension sections U-shaped stop space 46 in communication with thefirst flow way 43, thesecond flow way 44 and thewind inlet 31. Slight air in thewind inlet 31 of thecover body 3 is guided through thefirst flow way 43 into thestop space 46 and thesecond flow way 44, whereby slight wind pressure is created in thestop space 46 and thesecond flow way 44 to restrain the air in the receivingspace 20 from escaping out of the receivingspace 20. The first andsecond extension sections space 20 from escaping out of thewind inlet 31. - The
connection sections 47 of the fifth aspect are arranged in positions identical to that of the third aspect and thus will not be further described hereinafter. - Please refer to
FIGS. 6 and 8B .FIG. 8B is a sectional view of a sixth aspect. The sixth aspect is only different from the fifth aspect in that in the sixth aspect, thelip section 32 and the first andsecond extension sections projection 42 of the fifth aspect are substantially changed into an inclined form. - In practice, the configurations of the
lip section 32 and theprojection 42 are not limited to the above six aspects. Thelip section 32 can be designed with a configuration adapted to or not adapted to that of theprojection 42 as necessary to achieve the purpose of preventing the air in the receivingspace 20 from escaping. - In conclusion, in the present invention, the
frame body 2, thecover body 3 and thehub 4 with theblades 41 having theprojections 42 are assembled to achieve the purpose of preventing the air in the receivingspace 20 from escaping. Accordingly, the wind pressure and wind intensity are effectively enhanced to achieve an excellent heat dissipation effect. In comparison with the conventional device, the present invention has the following advantages: - 1. The wind pressure and wind intensity as a whole are enhanced.
- 2. An excellent heat dissipation effect is achieved.
- 3. The air flowing within the receiving space is effectively prevented from escaping out of the wind inlet.
- The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. It is understood that many changes and modifications of the above embodiments can be made without departing from the spirit of the present invention. The scope of the present invention is limited only by the appended claims .
Claims (22)
1. A fan impeller structure comprising:
a frame body having a receiving space;
a cover body having a wind inlet in communication with the receiving space; and
a hub rotatably disposed in the receiving space, the hub having multiple blades annularly arranged on a circumference of the hub, each blade having a top end and a bottom end, the top end having a projection extending from the top end toward the cover body, an axial space being defined between the blades and the hub.
2. The fan impeller structure as claimed in claim 1 , wherein the frame body further has a wind outlet in communication with the receiving space.
3. The fan impeller structure as claimed in claim 1 , wherein the cover body has a lip section formed along an edge of the wind inlet of the cover body opposite to the projections, the lip section having a first end face facing the hub and a second end face opposite to the first end face.
4. The fan impeller structure as claimed in claim 1 , wherein the projection has a first extension section protruding from the top end of the blade in adjacency to an inner side of the blade, the first extension section protruding into the wind inlet.
5. The fan impeller structure as claimed in claim 4 , wherein the first extension section has a first flow guide side facing the edge of the wind inlet, a first flow way being formed between the first flow guide side and the edge of the wind inlet in communication with the wind inlet and the receiving space.
6. The fan impeller structure as claimed in claim 1 , wherein the projection has a second extension section protruding from the top end of the blade in adjacency to the outer side of the blade, the second extension section having a second flow guide side distal from the wind inlet.
7. The fan impeller structure as claimed in claim 1 , wherein the projection has a first extension section and a second extension section, the first and second extension sections respectively protruding from the top end of the blade in adjacency to the inner and outer sides of the blade, the first extension section protruding into the wind inlet.
8. The fan impeller structure as claimed in claim 7 , wherein the first extension section has a first flow guide side facing the edge of the wind inlet, a first flow way being formed between the first flow guide side and the edge of the wind inlet, the first and second extension sections together defining a stop space in communication with the first flow way and the wind inlet.
9. The fan impeller structure as claimed in claim 1 , wherein the projections of the top ends of the blades are positioned at intervals or without any interval.
10. The fan impeller structure as claimed in claim 5 , wherein each two adjacent blades are interconnected by a connection section, the connection section extending between the top ends of the blades in adjacency to the outer sides thereof, the connection sections being connected in an annular form.
11. The fan impeller structure as claimed in claim 6 , wherein each two adjacent blades are interconnected by a connection section, the connection section extending between the top ends of the blades in adjacency to the outer sides thereof, the connection sections being connected between the projections in an annular form.
12. The fan impeller structure as claimed in claim 8 , wherein each two adjacent blades are interconnected by a connection section, the connection section extending between the top ends of the blades in adjacency to the outer sides thereof, the connection sections being connected between the projections in an annular form.
13. The fan impeller structure as claimed in claim 3 , wherein the projection has a first extension section protruding from the top end of the blade in adjacency to an inner side of the blade, the first extension section protruding into the wind inlet.
14. The fan impeller structure as claimed in claim 13 , wherein the first extension section has a first flow guide side facing the first end face, a first flow way being formed between the first flow guide side and the first end face in communication with the wind inlet and the receiving space.
15. The fan impeller structure as claimed in claim 3 , wherein the projection has a second extension section protruding from the top end of the blade in adjacency to the outer side of the blade.
16. The fan impeller structure as claimed in claim 15 , wherein the second extension section has a second flow guide side facing the second end face, a second flow way being formed between the second flow guide side and the second end face in communication with the wind inlet and the receiving space.
17. The fan impeller structure as claimed in claim 3 , wherein the projection has a first extension section and a second extension section, the first and second extension sections respectively protruding from the top end of the blade in adjacency to the inner and outer sides of the blade, the first extension section protruding into the wind inlet.
18. The fan impeller structure as claimed in claim 17 , wherein the first extension section has a first flow guide side facing the edge of the wind inlet, a first flow way being formed between the first flow guide side and the edge of the wind inlet, the first and second extension sections together defining a stop space in communication with the first flow way and the wind inlet.
19. The fan impeller structure as claimed in claim 1 , wherein a flow guide passage is defined between each two adjacent blades in communication with the axial space and the receiving space for guiding in an axial flow flowing within the axial space.
20. The fan impeller structure as claimed in claim 14 , wherein each two adjacent blades are interconnected by a connection section, the connection section extending between the top ends of the blades in adjacency to the outer sides thereof, the connection sections being connected in an annular form.
21. The fan impeller structure as claimed in claim 16 , wherein each two adjacent blades are interconnected by a connection section, the connection section extending between the top ends of the blades in adjacency to the outer sides thereof, the connection sections being connected between the projections in an annular form.
22. The fan impeller structure as claimed in claim 18 , wherein each two adjacent blades are interconnected by a connection section, the connection section extending between the top ends of the blades in adjacency to the outer sides thereof, the connection sections being connected between the projections in an annular form.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/159,364 US20120315134A1 (en) | 2011-06-13 | 2011-06-13 | Fan impeller structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/159,364 US20120315134A1 (en) | 2011-06-13 | 2011-06-13 | Fan impeller structure |
Publications (1)
Publication Number | Publication Date |
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US20120315134A1 true US20120315134A1 (en) | 2012-12-13 |
Family
ID=47293343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/159,364 Abandoned US20120315134A1 (en) | 2011-06-13 | 2011-06-13 | Fan impeller structure |
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US (1) | US20120315134A1 (en) |
Cited By (3)
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USD751685S1 (en) * | 2013-08-06 | 2016-03-15 | Shinano Kenshi Co., Ltd. | Blower |
DE102015108489B3 (en) * | 2015-05-29 | 2016-09-29 | Halla Visteon Climate Control Corporation | Centrifugal blower unit, in particular for motor vehicle air conditioners |
US20180142693A1 (en) * | 2016-11-22 | 2018-05-24 | Ford Global Technologies, Llc | Blower assembly for a vehicle |
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Owner name: ASIA VITAL COMPONENTS CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHEN, WEI-CHENG, MR.;REEL/FRAME:026436/0385 Effective date: 20110613 |
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