CN201437787U - Inner rotor type DC fan - Google Patents
Inner rotor type DC fan Download PDFInfo
- Publication number
- CN201437787U CN201437787U CN2009201583647U CN200920158364U CN201437787U CN 201437787 U CN201437787 U CN 201437787U CN 2009201583647 U CN2009201583647 U CN 2009201583647U CN 200920158364 U CN200920158364 U CN 200920158364U CN 201437787 U CN201437787 U CN 201437787U
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- Prior art keywords
- stator
- fan
- rotor
- permanent magnet
- containing space
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- Expired - Lifetime
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Abstract
The utility model provides an inner rotor type DC fan comprising a housing, a rotor, a stator, a fan wheel and a control drive unit, wherein, the housing is provided with an accommodating space, the rotor is rotationally accommodated in the accommodating space and is provided with a permanent magnet, the stator is fixedly arranged in the accommodating space by surrounding the rotor, and is further provided with at least one coil, the fan wheel is jointed to one end of the rotor, and the control drive unit is accommodated in the accommodating space and is electrically connected with the coil of the stator. Therefore, the control drive unit generates a control current, which is directly transferred to the coil of the stator, so as to magnetize a plurality of the magnet pole faces of the stator facing the permanent magnet, and the magnet pole faces' magnetization as magnetic poles can further lead to improved sensitivity and accuracy in the control over the DC fan.
Description
Technical field
The utility model is about a kind of DC fan, especially about a kind of inner rotor type DC fan.
Background technique
Please refer to shown in Figure 1ly, it illustrates the assembled sectional view of an existing inner rotor type DC fan, and this DC fan 9 is made of a housing 91, a stator 92, a rotor 93 and an impeller 94.This housing 91 has a containing space 910, for ccontaining this stator 92 and rotor 93; This stator 92 is fixed in the internal surface of this housing 91; These rotor 93 rotating being located in this containing space 910; This impeller 94 then is incorporated into an end of this rotor 93.
Referring again to shown in Figure 1, this stator 92 has a permanent magnet ring 921 and a brush 922.Wherein, this permanent magnet ring 921 is around this rotor 93, and this brush 922 then is adjacent to an end of this permanent magnet ring 921, and for being connected to a direct current power supply.On the other hand, this rotor 93 has an axostylus axostyle 931, a coiling 932 and one commutator 933 unshakable in one's determination, and wherein an end of this axostylus axostyle 931 passes this housing 91; This coiling unshakable in one's determination 932 is sheathed on this axostylus axostyle 931, and has an outer circumferential face towards this permanent magnet ring 921, and this coiling unshakable in one's determination 932 is provided with to form an air gap at interval with this permanent magnet ring 921, and when the coil of electric current by this coiling unshakable in one's determination 932, this electric current promptly produces the effect of magnetic interlinkage with the magnetic field of this permanent magnet ring 921; This commutator 933 also is sheathed on this axostylus axostyle 931 and is electrically connected with the coil of this coiling unshakable in one's determination 932, and this commutator 933 has an outer circumferential face for the slidably electrically contact of this brush 922.
According to above-mentioned existing structure of direct current fan, when this direct current power supply direct current during to the brush 922 of this stator 92, the coil of this coiling iron core 932 promptly delivered to this direct current by the commutator 933 of this rotor 93 by this brush 922.Whereby, this direct current formed electric current in this coil promptly produces the effect of magnetic interlinkage with the magnetic field of this permanent magnet ring 921, and then promotes this rotor 93 and be rotated with respect to this stator 92.In addition, adjust the electric current in the coil of this coiling iron core 932 by this direct current of control, can determine the rotating speed of this rotor 93.
Yet, because this commutator 933 is to constitute by being parallel to this axostylus axostyle 931 and separating several commutator segments that are provided with, so when this brush 922 when wherein a commutator segment switches to another adjacent commutator segment, promptly be easy between this brush 922 and commutator 933, produce spark, and produce disturb simultaneously and influence system automatic control.In addition, because this brush 922 must closely be connected to the outer circumferential face of this commutator 933, to guarantee the electrical contact between this brush 922 and the commutator 933, therefore not only must regularly replace the excessively brush 922 of abrasion, also must regularly handle the outer circumferential face of this commutator 933, influence electric conductivity between this brush 922 and the commutator 933 with the carbon distribution of avoiding aforesaid spark to be produced.In addition, though can determine the rotating speed of this rotor 93 by this direct current of control, but because this brush 922 is respectively to switch between this commutator segment, cause the direct current that conducts by this brush 922 and commutator 933 very easily thereby produce and disturb, cause this existing DC fan to be applicable to and accurately to control in the product of rotation speed of the fan.
More and, not only there is the defective that can't accurately control in above-mentioned existing DC fan 9, and when the load of this DC fan 9 changes to some extent, must by extra detective device (for example: mechanical governor, electronic speed regulator, tach signal producer or optical encoder) actual speed of this DC fan 9 be fed back in addition, so that correspondence is adjusted this galvanic magnitude of voltage and make this DC fan 9 in an expectation rotating speed running down; , cause the raising of the manufacture cost of this DC fan 9 thus, and the validity of this detective device itself also will influence the quality of rotating speed control.For these reasons, existing DC fan has necessity of being improved really.
The model utility content
The utility model provides a kind of inner rotor type DC fan, mainly be to produce the control electric current and directly will control the coil that electric current exports a stator to by a control drive unit, so that this DC fan has high control sensitivity and control accuracy, and can be its main goal of the invention for carrying out intelligent rotating speed control.
The utility model provides a kind of inner rotor type DC fan, is this stator to be directly fixed in the containing space of a housing in the mode that ejection formation coats, and to improve the assembling convenience of this DC fan, is its another goal of the invention.
The utility model provides a kind of inner rotor type DC fan, has the permanent magnet and the magnetic pole strength of same axial length, so that have preferable driving efficient between the stator of this DC fan and the rotor, is its another goal of the invention.
For reaching aforementioned goal of the invention, technological means that the utility model used and the effect that can reach by this technological means include:
A kind of inner rotor type DC fan comprises a housing, a rotor, a stator, an impeller and a control drive unit.This housing has a bearing frame, and this bearing frame forms a containing space; This rotor is rotating to be placed in this containing space, and this rotor has an axostylus axostyle and a permanent magnet, and the outside circumference of this axostylus axostyle is fixed in this permanent magnet socket; This stator is fixedly arranged in the containing space of bearing frame and around this rotor setting, and this stator has the outer circumferential face of several magnetic pole strengths towards this permanent magnet, formation one air gap between this magnetic pole strength and this permanent magnet respectively, and this stator has at least one coil in addition; This impeller is incorporated into an end of this axostylus axostyle; This control drive unit is located in this containing space, and is electrically connected with the coil of this stator.Wherein, this control drive unit is for producing the coil that the control electric current directly is sent to this stator, forms a magnetic pole with this magnetic pole strength magnetization respectively.Whereby, the control electric current that this control drive unit is exported need not pass through any brush and commutator, can directly export this stator to, so can improve the control sensitivity and the validity of this DC fan.
The housing of described inner rotor type DC fan is incorporated into this stator in the mode that ejection formation coats.Whereby, can further reduce the assembling complexity of this DC fan.
The permanent magnet of described inner rotor type DC fan this rotor axially on length, with this magnetic pole strength this rotor axially on length identical.
In sum, useful technique effect of the present utility model is: inner rotor type DC fan of the present utility model is that the control electric current of directly this control drive unit being exported with pinpoint accuracy is delivered to this stator, can effectively avoid this control electric current to contain excessive clutter, and more can carry out intelligent rotating speed control by this control drive unit.In addition, the mode that more can select directly to coat with ejection formation is directly fixed on this stator in the containing space of this housing, and then effectively improves the assembling convenience of DC fan of the present utility model.
Description of drawings
Fig. 1: a kind of assembled sectional view of existing DC fan.
Fig. 2: the three-dimensional exploded view of the preferred embodiment of inner rotor type DC fan of the present utility model.
Fig. 3: the assembled sectional view of the preferred embodiment of inner rotor type DC fan of the present utility model.
The primary component symbol description:
1 housing, 10 containing spaces, 11 wind-guiding housings, 111 intake grills
112 exhaust outlets, 12 bearing frames, 121 bodies, 122 base plates
123 locating pieces, 124 openings, 13 links, 14 runners
15 clutch shaft bearings, 16 second bearings, 2 stators, 21 ring bodies
211 inner peripheral surfaces, 22 poles, 221 magnetic pole strengths, 23 coils
3 rotors, 31 axostylus axostyles, 32 permanent magnets, 4 impellers
5 control drive unit, 9 DC fan, 91 housings, 910 containing spaces
92 stators, 921 permanent magnet ring 922 brushes 93 rotors
931 axostylus axostyles, 932 coilings, 933 commutators, 94 impellers unshakable in one's determination
Embodiment
For above-mentioned and other purpose of the present utility model, feature and advantage can be become apparent, preferred embodiment of the present utility model cited below particularly, and conjunction with figs. are described in detail below:
Please refer to shown in Fig. 2 and 3, it is exploded perspective view and the assembled sectional view that illustrates the inner rotor type DC fan of the utility model preferred embodiment.The DC fan of the utility model preferred embodiment comprises a housing 1, a stator 2, a rotor 3, an impeller 4 and a control drive unit 5.This housing 1 has a containing space 10, for being installed with this stator 2, rotor 3 and control drive unit 5; This stator 2 is fixedly arranged on the internal face of this housing 1; This rotor 3 passes this stator 2, and an end of this rotor 3 stretches out this housing 1; This impeller 4 is incorporated into the end that this rotor 3 stretches out this housing 1; This control drive unit 5 is electrically connected with this stator 2, and for being connected to an external power supply.Whereby, when electric current was controlled in these control drive unit 5 outputs one to this stator 2, this stator 2 promptly drove these rotor 3 these impellers 4 of drive and is rotated start with respect to this housing 1.
Shown in Fig. 2 and 3, the housing 1 of the utility model preferred embodiment has a wind-guiding housing 11 and a bearing frame 12, the axial two ends of this wind-guiding housing 11 form an intake grill 111 and an exhaust outlet 112 respectively, and the inside of this bearing frame 12 promptly is provided with this containing space 10, this bearing frame 12 is arranged in this wind-guiding housing 11, and between this intake grill 111 and exhaust outlet 112.Wherein, be to interconnect between this wind-guiding housing 11 and the bearing frame 12 with a connection piece 13 at least, so that form a runner 14 between this wind-guiding housing 11 and bearing frame 12, and this wind-guiding housing 11, bearing frame 12 and link 13 are preferable forms in one-body molded mode.Again, these link 13 preferable exhaust outlets 112 that are adjacent to this wind-guiding housing 11, and this link 13 can be selected structures such as rib or stator blade for use.In addition, according to the applicable cases of DC fan of the present utility model, this housing 1 also can only comprise the bearing frame 12 with this containing space 10.
More in detail, bearing frame 12 of the present utility model is preferably by a body 121, a base plate 122 and positioning piece 123 to be formed jointly, wherein this body 121 mutually combines with this containing space 10 of common formation with this base plate 122, and this locating piece 123 is fixedly arranged in this containing space 10.In addition, this bearing frame 12 has more the top that an opening 124 is formed at this body 121, and towards this intake grill 111, and this opening 124 can be in conjunction with a clutch shaft bearing 15, this locating piece 123 then can be in conjunction with one second bearing 16, this clutch shaft bearing 15 and second bearing 16 this DC fan axially on the contraposition setting.
Shown in Fig. 2 and 3, the stator 2 of the utility model preferred embodiment is to be provided with around this rotor 3, and is fixedly arranged between this first and second bearing 15,16, and wherein this stator 2 comprises a ring body 21, several poles 22 and several coils 23.The inboard of this ring body 21 forms an inner peripheral surface 211; Respectively an end of this pole 22 connects the inner peripheral surface 211 of this ring body 21, respectively the other end of this pole 22 then extends and forms a magnetic pole strength 221 to the center of this ring body 21, wherein these several poles 22 are preferably equally spaced being arranged on this inner peripheral surface 211, and arrange radially according to the center of this ring body 21; These several coils 23 are wound in this several poles 22 respectively.Whereby, when importing electric current to this coil 23 respectively, the magnetic pole strength 221 of promptly magnetisable respectively this pole 22 and form a magnetic pole, and then activate this rotor 3.In addition, when the bearing frame 12 of this housing 1 selected mode with ejection formation to form, the mode that can utilize ejection formation to coat directly was incorporated into this stator 2 internal face of this bearing frame 12.Whereby, the assembling complexity of DC fan of the present utility model can significantly reduce.
Shown in Fig. 2 and 3, this rotor 3 is rotating being placed in this containing space 10, and this rotor 3 has an axostylus axostyle 31 and a permanent magnet 32.One end of this axostylus axostyle 31 in conjunction with and pass this clutch shaft bearing 15 so that stretch out this bearing frame 12 and be incorporated into this impeller 4, the other end of this axostylus axostyle 31 then is incorporated into this second bearing 16; The outside circumference of this axostylus axostyle 31 is fixed in these permanent magnet 32 sockets, and this permanent magnet 32 has an outer circumferential face towards the magnetic pole strength 221 of this pole 22 respectively.Wherein, this rotor 3 axially on, the length of this permanent magnet 32 is identical with the length of this magnetic pole strength 221, so that this permanent magnet 32 just can interact with these magnetic pole strength 221 formed magnetic poles, makes inner rotor type DC fan of the present utility model have preferable driving efficient.In addition, the outer circumferential face of this permanent magnet 32 and respectively all have an air gap between this magnetic pole strength 221.This control drive unit 5 is fixedly arranged between this base plate 122 and the locating piece 123, and this control drive unit 5 is electrically connected with respectively this coil 23 of this stator 2.
When inner rotor type DC fan of the present utility model turned round, this control drive unit 5 received electric energy that this external power supply produced, and so as to producing this control electric current and being sent to the coil 23 of this stator 2.Whereby, the control electric current of the coil 23 by this stator 2 makes the magnetic pole strength 221 of this pole 22 form these magnetic poles, and produces mutual repulsion effects with the permanent magnet 32 of this rotor 3, and then drives this rotor 3 and drive these impellers 4 and be rotated start.Wherein, because DC fan of the present utility model need not passed through any extra brush and commutator, can directly should control electric current and be sent to this stator 2, so a structure can significantly reduce the interference that is produced really when this control electric current of transmission by this control drive unit 5.In view of the above, the circuit of this control drive unit 5 can be made of intelligent intergrated circuit, and can make this control electric current under the situation that can not be subjected to the influence of excessive interference or clutter, the control electric current that output has a pinpoint accuracy to this coil 23 respectively carries out rotating speed control, and then reaches the purpose with high control sensitivity and control accuracy.
More in detail, by a converter circuit being set, can produce feedback signal, so that DC fan of the present utility model is carried out accurate rotation speed servo control according to the running of this converter circuit in this control drive unit 5.In addition, also pulse modulation technology (Pulse Width Modulation) can be applied to this control envelope driver element 5, utilization changes the Pulse wave width of ON time and adjusts the average power that puts on this stator 2, and then changes its rotating speed.More and, can be directly detect and feed back the control electric current that it produces, so that when producing unusual operating condition, send alarm signal, or can be when DC fan of the present utility model and other devices carry out system combination for using by this control drive unit 5.
In sum, must transmit a direct current by brush and commutator compared to existing DC fan, thereby make this direct current produce excessive clutter, inner rotor type DC fan of the present utility model is that the control electric current of directly this control drive unit 5 being exported with pinpoint accuracy is delivered to this stator 2, can effectively avoid this control electric current to contain excessive clutter, and more can carry out intelligent rotating speed control by this control drive unit 5.In addition, the mode that more can select directly to coat with ejection formation is directly fixed on this stator 2 in the containing space 10 of this housing 1, and then effectively improves the assembling convenience of DC fan of the present utility model.
Claims (6)
1. inner rotor type DC fan is characterized in that comprising:
A housing has a bearing frame, and this bearing frame forms a containing space;
A rotor, rotating being placed in this containing space, this rotor has an axostylus axostyle and a permanent magnet, and the outside circumference of this axostylus axostyle is fixed in this permanent magnet socket;
A stator, be fixedly arranged in the containing space of bearing frame and around this rotor setting, this stator has several magnetic pole strengths towards the outer circumferential face of this permanent magnet, and respectively this magnetic pole strength forms air gap between this permanent magnet, and this stator has at least one coil in addition;
An impeller is incorporated into an end of this axostylus axostyle; And
A control drive unit is located in this containing space, and is electrically connected with the coil of this stator.
2. inner rotor type DC fan as claimed in claim 1 is characterized in that, the bearing frame of this housing is incorporated into this stator in the mode that ejection formation coats.
3. inner rotor type DC fan as claimed in claim 1 is characterized in that, this permanent magnet and this magnetic pole strength this rotor axially on length identical.
4. inner rotor type DC fan as claimed in claim 1 or 2, it is characterized in that the quantity of this coil is several, and stator has several poles in addition, these several poles promptly form these several magnetic pole strengths respectively towards an end of this rotor, and these several coils are wound in this several poles respectively.
5. inner rotor type DC fan as claimed in claim 4 is characterized in that, this stator has a ring body in addition, and respectively the other end of this pole is connected in the inner peripheral surface of this ring body.
6. as wherein each described inner rotor type DC fan of claim 1 to 3, it is characterized in that, this bearing frame comprises a body, a base plate and a locating piece, this body and base plate mutually combine and form this containing space, and this locating piece is fixedly arranged in this containing space and in abutting connection with this stator, and this control drive unit is fixedly arranged between this base plate and the locating piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201583647U CN201437787U (en) | 2009-05-22 | 2009-05-22 | Inner rotor type DC fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201583647U CN201437787U (en) | 2009-05-22 | 2009-05-22 | Inner rotor type DC fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201437787U true CN201437787U (en) | 2010-04-14 |
Family
ID=42399761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201583647U Expired - Lifetime CN201437787U (en) | 2009-05-22 | 2009-05-22 | Inner rotor type DC fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201437787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892995B (en) * | 2009-05-22 | 2012-05-16 | 建准电机工业股份有限公司 | Inner rotor type DC fan |
-
2009
- 2009-05-22 CN CN2009201583647U patent/CN201437787U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892995B (en) * | 2009-05-22 | 2012-05-16 | 建准电机工业股份有限公司 | Inner rotor type DC fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100414 Effective date of abandoning: 20090522 |