CN101825094B - Radiating fan - Google Patents

Abstract

The invention relates to a radiating fan, comprising a fan frame, a stator, a rotor and at least one locating piece, wherein the stator and the rotor are combined at the inner side of the fan frame, and the stator is used for driving the rotor to rotate; the rotor is provided with a fan wheel, and the fan wheel is provided with a plurality of blades; and the at least one locating piece is combined with the fan frame and is provided with a baffle which extends above the rotating range of the blades of the rotor. Thus, in the process of transporting, loading, packaging or operating of the radiating fan, even the radiating fan is impacted by excessive external force, the locating piece still can be used for effectively preventing the rotor from separating from the fan frame, and the arrangement of the locating piece can not excessively influence the air inflow of the fan frame; and the locating piece can also be quickly combined at the preset position of the fan frame, so that the radiating fan can not be excessively restricted in the assembling process, thereby improving the assembling convenience.

Description

Radiation fan

Technical field

The present invention is relevant for a kind of radiation fan, especially a kind of small-sized axial-flow type radiator fan of guaranteeing that rotor can not deviate from arbitrarily.

Background technique

Electronic product generally is towards directions such as microminiaturized trend research and development design now, and therefore, general common on the market axial-flow type radiator fan also can cooperate towards microminiaturized direction research and development design.For example: also have relevant practitioner to replace tradition like members such as cramps with the magnetic element; And can reach the function that prevents that rotor from deviating from equally; Overall volume and axial height so as to the existing radiation fan of effective reduction; And the spinning movement of holding concurrently and can stablizing this radiation fan, reaching microminiaturized purpose, and then convenient this radiation fan is installed on hypomegetic electronic equipment or electronic instrument.

Please with reference to shown in Figure 1, disclose and a kind ofly replace the existing radiation fan 8 of traditional cramp with the magnetic element, this radiation fan 8 comprises a skeleton frame 81, a stator 82, a rotor 83 and a magnetic element 84.This skeleton frame 81 has a central siphon 811; This stator 82 is incorporated into the periphery wall of this central siphon 811; This rotor 83 is provided with an axostylus axostyle 831 and a permanent magnet 832, and wherein this rotor 83 is by the central siphon 811 of these axostylus axostyle 831 these skeleton frames 81 of rotatable combination; This magnetic element 84 is arranged at these skeleton frame 81 inboards and keeps a magnetic spacing with this permanent magnet 832, and utilizes the magnetic effect that is produced between the two, breaks away from these skeleton frames 81 to prevent this rotor 83.

Yet; When this radiation fan 8 in the actual process of carrying, load, packing or turning round, during like the collision of the excessive external force of careless experience, because this radiation fan 8 utilizes this magnetic element 84 and the magnetic effect each other of this permanent magnet 832; To avoid this rotor 83 to break away from this skeleton frame 81; Therefore, only under the condition of the magnetic effect of single magnetic element 84, can't guarantee that still this rotor 83 can not break away from this skeleton frame 81 arbitrarily by this.

M309021 number " micro fan " novel patent of TaiWan, China certificate number and for example.Please with reference to shown in Figure 2, this another 9 of existing radiation fans comprise an impeller 91, a shell block 92 and a bottom plate 93.This impeller 91 is provided with an axostylus axostyle 911 and a permanent magnet 912; This shell block 92 has an intake grill 921, and this intake grill 921 is provided with an intilted water conservancy diversion flange 922; This bottom plate 93 combines these shell blocks 92, and this bottom plate 93 has a central siphon 931, and this central siphon 931 can supply the axostylus axostyle 911 of this impeller 91 to combine, and in these bottom plate 93 inner edges one magnetic location piece 932 is set.Whereby; Should remove this magnetic location piece 932 and the magnetic effect each other of this permanent magnet 912 capable of using by existing radiation fan 9; To avoid this impeller 91 to break away from outside this shell block 92, also can cooperate the design of this water conservancy diversion flange 922, be unlikely to break away from arbitrarily this shell block 92 further to guarantee this impeller 91.

Yet; Because the water conservancy diversion flange 922 of aforementioned existing radiation fan 9 is the link spring shape flange around the intake grill that is arranged at this shell block 92 921 inboards; Though this water conservancy diversion flange 922 can effectively prevent this impeller 91 and break away from this shell block 92; Cause the bore of this intake grill 921 to dwindle also, and then influence the air output of this existing radiation fan 9, cause its radiating effect not good.Moreover; More because the intake grill 921 of this shell block 92 is provided with this water conservancy diversion flange 922; Therefore, this existing radiation fan 9 then must be especially with after being assembled in this bottom plate 93 like associated components such as impeller 91, axostylus axostyle 911 and central siphons 931 in advance when actual assembled; Can again this shell block 92 be mutually combined with this bottom plate 93; Also promptly this shell block 92 and this bottom plate 93 also can't so make the assembling of this existing radiation fan 9 receive not little restriction, also cause the inconvenience in the assembling by one-body molded as a fan frame.

Summary of the invention

The main goal of the invention of the present invention provides a kind of radiation fan, can not break away from skeleton frame arbitrarily to guarantee rotor.

Another purpose of radiation fan of the present invention is to make this radiation fan still keep predetermined radiating effect.

The another purpose of radiation fan of the present invention is to guarantee that this radiation fan is unlikely to receive too much restriction in assembling.

For reaching aforementioned goal of the invention, technological means that the present invention used and the effect that can reach by this technological means include:

A kind of radiation fan comprises a fan frame, a stator, a rotor and a bounding means.This fan frame has a wind inlet and an exhaust outlet; It is inboard that this stator is incorporated into this fan frame; This rotor is through this stator of the rotatable combination of rotating shaft; And this rotor has an impeller; This impeller is provided with several blades; Respectively this blade has one first end angle of contiguous this wind inlet and one second end angle of contiguous this exhaust outlet respectively, upwards has one first spacing in the footpath of this rotating shaft between the first end angle of wherein any two adjacent blades and the second end angle; This bounding means is incorporated into the wind inlet periphery of this fan frame; This bounding means has a catch of the blade rotating range top that extends to this rotor; This catch has one first side and one second side; Have one second spacing between this first side and second side, this second spacing is greater than this first spacing.Whereby, can reach and prevent that effectively this rotor breaks away from arbitrarily this fan frame, and keep this radiation fan and have many effects such as certain radiating effect.

Another kind of radiation fan comprises a fan frame, a stator, a rotor and several bounding meanss.This fan frame has a wind inlet and an exhaust outlet; It is inboard that this stator is incorporated into this fan frame; This rotor combines this stator, and this rotor has an impeller, and this impeller is provided with several blades; Respectively this bounding means is incorporated into the wind inlet periphery of this fan frame respectively; Respectively this bounding means has a catch of the blade rotating range top that extends to this rotor respectively; Wherein the blade of this rotor is in this inboard any position of fan frame, the top of the wherein blade that the catch that all has at least one bounding means is positioned at this rotor on axially.Whereby, can reach equally and prevent that this rotor breaks away from arbitrarily this fan frame, and keep many effects such as the certain radiating effect of this radiation fan.

The wind inlet periphery of said fan frame is provided with a fixing part, and this bounding means combines the fixing part of this fan frame.Whereby, can conveniently this bounding means be incorporated into the predetermined position of this fan frame, to reach the effect that promotes the assembling convenience.

Said fixing part is a location groove, and this bounding means comprises a body and and combines projection, this combinations projection to be formed at this body bottom, and this combination projection is arranged in this positioning groove, and other this catch is formed at a side periphery of this body.Whereby, this bounding means engaging mode capable of using is incorporated into this fixing part, can be incorporated into more quickly and easily in this positioning groove for this bounding means.

Form several perforation in the formed positioning groove of the fixing part of said fan frame, several locating columns are formed on the body bottom of this bounding means, and respectively this locating column is incorporated into several perforation in this positioning groove.Whereby, promote this bounding means and this fixing part linking steady character effect each other to reach.

Said stator has a power supply wiring, and this power supply wiring one end stretches through to the outside of this fan frame via this positioning groove, and this power supply wiring is held between this bounding means and this fixing part.Whereby, make this power supply wiring have the effect of better locating effect to reach.

Have one the 3rd spacing between first end angle of arbitrary blade of said rotor and the first end angle of adjacent another blade, formed second spacing is greater than the 3rd spacing between first side of this bounding means and second side.Whereby, can prevent effectively that respectively the first end angle of this blade surpasses this bounding means end face, prevent deviating from effect to reach better rotor.

Said fan frame inboard is provided with a balancing patch, and the impeller inboard of this rotor has a permanent magnet, corresponding this balancing patch of magnetic of this permanent magnet.Whereby, can more effectively prevent that this rotor breaks away from this fan frame, and with the effect of stablizing this rotor rotation.

One portion of stratum is formed on the formed positioning groove of the fixing part of said fan frame bottom, and this bounding means bottom shape is to shape that should portion of stratum.Whereby, make the power supply wiring that is held between this bounding means and this fixing part can form kink shape, so that reach better positioning action, and with the effect of anti-pull.

Beneficial effect of the present invention is: radiation fan of the present invention is mainly by the design of this bounding means; Make this radiation fan in the actual process of carrying, load, packing or turning round; Even as when accidentally meeting with the collision of excessive external force, can guarantee that still this rotor can not break away from this fan frame arbitrarily.Moreover; Bounding means of the present invention is not to be the link spring shape flange around being arranged at this wind inlet inboard, and therefore, this bounding means still is unlikely to cause the bore of this wind inlet excessively to dwindle; To avoid air output to reduce, so can make radiation fan of the present invention keep certain radiating effect.In addition, by the design of this bounding means, the present invention's one-body molded mode capable of using is made this fan frame; And after this fan frame supplies this stator and the assembling of this rotor; Can directly this bounding means be incorporated into fast the fixing part of this fan frame, accomplish the assembling operation of this radiation fan whereby, therefore; Radiation fan of the present invention can not receive too big restriction in assembling, and holds concurrently and can promote its assembling convenience.

Description of drawings

Fig. 1: the assembled sectional view of existing radiation fan.

Fig. 2: the three-dimensional exploded view of another kind of existing radiation fan.

Fig. 3: the three-dimensional exploded view of the radiation fan of first embodiment of the invention.

Fig. 4: the plan view of the radiation fan of first embodiment of the invention.

Fig. 5: the three-dimensional exploded view of the radiation fan of second embodiment of the invention.

Fig. 6: the plan view of the radiation fan of second embodiment of the invention.

Fig. 7: the plan view of the another kind of radiation fan of second embodiment of the invention.

Fig. 8: the three-dimensional exploded view of the radiation fan of third embodiment of the invention.

Fig. 9: the plan view of the radiation fan of third embodiment of the invention.

Figure 10: the rotor of the radiation fan of third embodiment of the invention schematic representation in the running.

Figure 11: the partial sectional view when the fan frame fixed base of radiation fan of the present invention forms portion of stratum.

The primary component symbol description:

1,2,3 radiation fans 10,10 ' are fanned frame 11 frameworks

111 wind inlets, 112 exhaust outlets, 12 load bearing seats, 121 links

122 central siphons, 13 fixing parts, 131 perforation, 132 portions of stratum

31 rotating shafts of 20 stators, 21 power supply wirings, 30 rotors

32 impellers, 321 blade 321a, the first end angle 321b, the second end angle

33 permanent magnets, 40 bounding meanss, 41 bodies, 411 locating columns

42 combine projection 43 catch 431 first sides 432 second sides

50 bounding meanss, 51 bodies, 511 locating columns 52 combine projection

53 catch, 531 first sides, 532 second sides, 60 bounding meanss

61 bodies, 611 locating columns 62 combine projection 63 catch

8 radiation fans, 81 skeleton frames, 811 central siphons, 82 stators

83 rotors, 831 axostylus axostyles, 832 permanent magnets, 84 magnetic elements

9 radiation fans, 91 impellers, 911 axostylus axostyles, 912 permanent magnets

92 shell blocks, 921 intake grills, 922 water conservancy diversion flanges, 93 bottom plates

931 central siphons

Embodiment

For letting above-mentioned and other purposes, characteristic and the advantage of the present invention can be more obviously understandable, hereinafter is special lifts preferred embodiment of the present invention, and cooperates appended graphicly, elaborates as follows:

Please with reference to Fig. 3 and shown in Figure 4, be the radiation fan 1 of first embodiment of the invention, this radiation fan 1 comprises a fan frame 10, a stator 20, a rotor 30 and a bounding means 40, wherein:

This fan frame 10 has a framework 11 and a load bearing seat 12.These framework 11 two ends are respectively equipped with a wind inlet 111 and an exhaust outlet 112; And wind inlet 111 peripheries of this framework 11 are provided with a fixing part 13 in addition; This fixing part 13 can be designed to various in order to this structure that bounding means 40 carries out dismounting to be provided, for example: positioning groove, positioning hole or positioning convex column etc., in embodiment as shown in the figure; This fixing part 13 is a location groove, several perforation 131 of preferable formation in this positioning groove; 12 of this load bearing seats are incorporated into the exhaust outlet 112 of this framework 11 with several links 121, and this load bearing seat 12 is provided with a central siphon 122.

This stator 20 is incorporated into the load bearing seat 12 of this fan frame 10 and is positioned at this central siphon 122 peripheries, and in addition, this stator 20 has a power supply wiring 21, and these power supply wiring 21 1 ends are preferable can to stretch through to the outside of this fan frame 10 via these fixing part 13 formed positioning grooves.

This rotor 30 has a rotating shaft 31, an impeller 32 and a permanent magnet 33.These rotating shaft 31 1 ends combine this impeller 32, and the other end combines the central siphon 122 of this fan frame 10, so that this this stator 20 of rotor 30 rotatable combinations; This impeller 32 is provided with several blades 321; Respectively this blade 321 has one first end angle 321a of contiguous this wind inlet 111 respectively; And one second end angle 321b of contiguous this exhaust outlet 112; Wherein as shown in Figure 4, upwards have one first spacing (D1) between the first end angle 321a of any two adjacent blades 321 and the second end angle 321b in the footpath of this rotating shaft 31; 33 of this permanent magnets are incorporated into inboard and this stator 20 of contraposition of this impeller 32.

This bounding means 40 is for being incorporated into the member of the fixing part 13 of this framework 11 removably, so this bounding means 40 based under the condition that can combine this fixing part 13, also can cooperate the structure space form of this fixing part 13 and be designed to various shape.As shown in Figure 3; When this fixing part 13 selects formation one to locate groove; 40 of bounding meanss can be designed to comprise a body 41 and and combine projection 42, and several locating columns 411 can be formed on these body 41 bottoms, and 42 of this combination projections are formed at these body 41 bottoms and respectively between this locating column 411; Whereby; The combination projection 42 of this bounding means 40 can be arranged in these fixing part 13 formed positioning grooves; Respectively this locating column 411 then is incorporated into several perforation 131 in this positioning groove; With the linking steady character between this bounding means 40 of effective lifting and this fixing part 13, and make this bounding means 40 can be incorporated into wind inlet 111 peripheries of this fan frame 10 really.

Again, this bounding means 40 has a catch 43 of the blade 321 rotating ranges top that extends to this rotor 30 in addition, and this catch 43 is formed at a side periphery of this body 41; In addition; This catch 43 has one first side 431 and one second side 432; As shown in Figure 4; Have one second spacing (D2) between this first side 431 and this second side 432, this second spacing (D2) is greater than aforementioned first spacing (D1), so that this bounding means 40 can be with to prevent that this rotor 30 breaks away from these fan frames 10.

Radiation fan of the present invention can be assembled in rear flank in this fan frame 10 with this stator 20 and this rotor 30 when actual assembled is used, this bounding means 40 is assembled in wind inlet 111 peripheries of this fan frame 10 again, can accomplish assembling operation, so have the convenience in the assembling; In addition, when this bounding means 40 was incorporated into this fixing part 13, the power supply wiring 21 of this stator 20 also can be held between this bounding means 40 and this fixing part 13, so that this power supply wiring one preferred positioning effect to be provided.The more important thing is that because the catch 43 of this bounding means 40 extends to the rotating range top of the blade 321 of this rotor 30, and this second spacing (D2) is greater than this first spacing (D1); Therefore, radiation fan 1 of the present invention is in the process of carrying, loading or packing, even this radiation fan 1 suffers the improper bump of external force, but still can not break away from this fan frame 10 arbitrarily to guarantee this rotor 30 by the block effect of this catch 43; Moreover, when this stator 20 drives these rotor 30 spinning movements, also can prevent that effectively this rotor 30 breaks away from this fan frame 10 accidentally in rotary course, can rotate to guarantee this radiation fan 1 smoothly by this catch 43.

Again; Radiation fan 1 of the present invention also can be provided with a balancing patch (not illustrating) on this load bearing seat 12, this balancing patch is that permeability magnetic material is made, so that this permanent magnet 33 of corresponding magnetic; And then this balancing patch capable of using and this permanent magnet 33 magnetic effect each other; The structural design of the aforementioned bounding means 40 of further again collocation breaks away from this fan frame 10 with more effective this rotor 30 that prevents in rotary course, and double this rotor 30 balance and stabilities that can make turn round; This balancing patch so bounding means 40 can be arranged in pairs or groups, and be that this rotor 30 prevents that the function of deviating from provides a better effect.

Please with reference to Fig. 5 and shown in Figure 6, be the radiation fan 2 of second embodiment of the invention, this radiation fan 2 comprises a fan frame 10, a stator 20, a rotor 30 and a bounding means 50 equally.It is identical with the described structure characteristic of aforementioned first embodiment wherein should to fan frame 10, stator 20 and rotor 30, therefore repeats no more.In addition, as shown in Figure 6, upwards have one the 3rd spacing (D3) between the first end angle 321a of the first end angle 321a of arbitrary blade 321 of this rotor 30 and adjacent another blade 321 in the footpath of this rotating shaft 31.

The bounding means 50 preferable bodies 51, that comprise of second embodiment of the invention combine a projection 52 and a catch 53.131 several locating columns 511 of respectively boring a hole that can be incorporated into this fan frame 10 are formed on this body 51 bottoms; This combination projection 52 is formed at this body 51 bottoms, so that be arranged in this fixing part 13 formed positioning grooves; This catch 53 is formed at a side periphery of this body 51; And this catch 53 has one first side 531 and one second side 532; As shown in Figure 6, have one second spacing (D2) between this first side 531 and this second side 532, this second spacing (D2) is greater than aforementioned the 3rd spacing (D3).

The difference of the bounding means 50 of second embodiment of the invention and first embodiment's bounding means 40 only is: by the design of this second spacing (D2) greater than the 3rd spacing (D3); Cooperate between first side 531 and second side 532 of this catch 53 formed one to stop scope again; Make this stop that scope can axially contain two blades 321; And this stops that scope also can axially contain at least one first end angle 321a of this two blade 321; For example: as shown in Figure 6, can contain two first end angle 321a simultaneously; Or as shown in Figure 7, only contain one first end angle 321a.Whereby, in the process of this rotor 30, can prevent effectively that respectively the first end angle 321a of this blade 321 surpasses these bounding means 50 end faces, and then provide these rotor 30 better preventing to deviate from effect in high speed rotating action.

Please with reference to Fig. 8 and shown in Figure 9, be the radiation fan 3 of third embodiment of the invention, this radiation fan 3 comprises a fan frame 10 ', a stator 20, a rotor 30 and several bounding meanss 60 equally.Wherein the difference of this fan frame 10 ' and first embodiment's fan frame 10 only is: wind inlet 111 peripheries of this framework 11 are provided with two fixing parts 13 (can set up according to actual demand is more than two); Again, 30 of this stator 20 and rotors are identical with the described structure characteristic of aforementioned first embodiment, therefore repeat no more.In addition, as shown in Figure 9, each blade 321 of this rotor 30 upwards has a gap (d) in the footpath of this rotating shaft 31 each other.

The bounding means 60 of third embodiment of the invention is two (also can set up according to actual demand is more than two), and respectively this bounding means 60 comprises a body 61, respectively and combines a projection 62 and a catch 63.131 several locating columns 611 of respectively boring a hole that can be incorporated into this fan frame 10 ' are formed on this body 61 bottoms; This combination projection 62 is formed at this body 61 bottoms, so that be arranged in this fixing part 13 formed positioning grooves; This catch 63 is formed at a side periphery of this body 61.

The difference of the bounding means 60 of third embodiment of the invention and first embodiment and second embodiment's bounding means 40,50 only is: the quantity of this bounding means 60 is several; Design by these several bounding meanss 60; Shown in figure 10; When no matter the blade 321 that makes this rotor 30 is positioned at the inboard any position of this fan frame 10 ' because of spinning movement, even the catch 63 of part bounding means 60 can be positioned at this gap (d), but still the top of the wherein blade 321 that the catch 63 that has a bounding means 60 at least can be positioned at this rotor 30 on axially; So that utilize 60 designs of arbitrary bounding means, and prevent that effectively this rotor 30 from deviating from arbitrarily.Whereby; Present embodiment can utilize the design of the catch 63 of several bounding meanss 60 really; To reach the effect that prevents that rotor 30 from deviating from, therefore, the length dimension of the catch 63 of present embodiment bounding means 60; Need not be designed to accurately to cooperate the dimensions length of the blade 321 of this rotor 30 as first embodiment or second embodiment's catch 43,53, so can promote the making convenience of this bounding means 60.

Again; See also shown in Figure 11; The radiation fan 1,2,3 that aforementioned first, second and third embodiment is disclosed; Preferablely also can form portions of stratum 132 (only propose explanation with first embodiment, also be applicable to second and third embodiment) in this formed positioning grooves of fixing part 13 bottom that fan frame 10, body 41 bottom shapes of this bounding means 40 are then to shape that should portion of stratum 132; Whereby, when this bounding means 40 was incorporated into the fixing part 13 of this fan frame 10,21 of power supply wirings that are held between this bounding means 40 and this fixing part 13 can form kink shape, so that reach better positioning action, and with the effect of anti-pull.

As stated; Radiation fan of the present invention is mainly by the design of this bounding means 40,50,60; Make this radiation fan 1,2,3 in the actual process of carrying, load, packing or turning round; Even as when accidentally meeting with the collision of excessive external force, can guarantee that still this rotor 30 can not break away from this fan frame 10,10 ' arbitrarily.Moreover; Bounding means 40,50,60 of the present invention is not for around being arranged at the inboard link spring shape flange of this wind inlet 111; Therefore; This bounding means 40,50,60 still is unlikely to cause the bore of this wind inlet 111 excessively to dwindle, and reduces to avoid air output, so can make radiation fan 1,2,3 of the present invention keep certain radiating effect.In addition, by the design of this bounding means 40,50,60, the present invention's one-body molded mode capable of using is made this fan frame 10,10 '; And after this fan frame 10,10 ' supplies this stator 20 and 30 assemblings of this rotor; Can be directly this bounding means 40,50,60 be incorporated into this fan frame 10,10 ' fixing part 13 fast, accomplishes the assembling operation of this radiation fan 1,2,3 whereby, therefore; Radiation fan 1,2,3 of the present invention can not receive too big restriction in assembling, and holds concurrently and can promote its assembling convenience.

Claims (14)

1. radiation fan is characterized in that comprising:

A fan frame has a wind inlet and an exhaust outlet;

A stator is incorporated into this fan frame inboard;

A rotor; Through this stator of the rotatable combination of rotating shaft; This rotor has an impeller; This impeller is provided with several blades, and respectively this blade has one first end angle of contiguous this wind inlet and one second end angle of contiguous this exhaust outlet respectively, upwards has one first spacing in the footpath of this rotating shaft between the first end angle of wherein any two adjacent blades and the second end angle; And

A bounding means; Be incorporated into the wind inlet periphery of this fan frame; This bounding means has a catch of the blade rotating range top that extends to this rotor; This catch has one first side and one second side, has one second spacing between this first side and second side, and this second spacing is greater than this first spacing.

2. radiation fan as claimed in claim 1 is characterized in that: the wind inlet periphery of this fan frame is provided with a fixing part, and this bounding means is incorporated into the fixing part of this fan frame.

3. radiation fan as claimed in claim 2; It is characterized in that: this fixing part is a positioning groove; This bounding means comprises a body and a combination projection; This combination projection is formed at this body bottom, and this combination projection is arranged in this positioning groove, and other this catch is formed at a side periphery of this body.

4. radiation fan as claimed in claim 3 is characterized in that: form several perforation in the formed positioning groove of the fixing part of this fan frame, several locating columns are formed on the body bottom of this bounding means, and respectively this locating column is incorporated into each perforation in this positioning groove.

5. radiation fan as claimed in claim 3 is characterized in that: this stator has a power supply wiring, and this power supply wiring one end stretches through to the outside of this fan frame via this positioning groove, and this power supply wiring is held between this bounding means and this fixing part.

6. radiation fan as claimed in claim 5 is characterized in that: a portion of stratum is formed on the formed positioning groove of the fixing part of this fan frame bottom, and the body bottom shape of this bounding means is to shape that should portion of stratum.

7. like claim 1,2,3,4,5 or 6 described radiation fans; It is characterized in that: have one the 3rd spacing between first end angle of arbitrary blade of this rotor and the first end angle of adjacent another blade, formed second spacing is greater than the 3rd spacing between first side of this bounding means and second side.

8. like claim 1,2,3,4,5 or 6 described radiation fans, it is characterized in that: this fan frame inboard is provided with a balancing patch, and the impeller inboard of this rotor has a permanent magnet, corresponding this balancing patch of magnetic of this permanent magnet.

9. radiation fan is characterized in that comprising:

A fan frame has a wind inlet and an exhaust outlet;

A stator is incorporated into this fan frame inboard;

A rotor, in conjunction with this stator, this rotor has an impeller, and this impeller is provided with several blades; And

Several bounding meanss, the wind inlet that is incorporated into this fan frame respectively is peripheral, and respectively this bounding means has a catch of the blade rotating range top that extends to this rotor respectively;

Wherein the blade of this rotor is in this inboard any position of fan frame, and the catch that all has at least one bounding means is positioned at one of them blade top in the axial direction of this rotor.

10. radiation fan as claimed in claim 9 is characterized in that: the wind inlet periphery of this fan frame is provided with several fixing parts, and respectively this bounding means combines each fixing part of this fan frame respectively.

11. radiation fan as claimed in claim 10; It is characterized in that: respectively this fixing part is respectively a positioning groove; Respectively this bounding means comprises a body and a combination projection respectively; This combination projection is formed at this body bottom, and this combination projection is arranged in this positioning groove, and other this catch is formed at a side periphery of this body.

12. radiation fan as claimed in claim 11 is characterized in that: form several perforation in the formed positioning groove of each fixing part of this fan frame respectively, respectively several locating columns that combine respectively to be somebody's turn to do perforation are formed respectively on the body of this bounding means bottom.

13. radiation fan as claimed in claim 11; It is characterized in that: this stator has a power supply wiring; This power supply wiring one end stretches through to the outside of this fan frame via the positioning groove of one of them fixing part, and this power supply wiring is held between this bounding means and this fixing part.

14. radiation fan as claimed in claim 13 is characterized in that: a portion of stratum is formed on the formed positioning groove of the fixing part of this fan frame bottom, and the body bottom shape of this bounding means is to shape that should portion of stratum.

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