CN201225297Y - DC fan using AC power supply - Google Patents
DC fan using AC power supply Download PDFInfo
- Publication number
- CN201225297Y CN201225297Y CNU2008200544496U CN200820054449U CN201225297Y CN 201225297 Y CN201225297 Y CN 201225297Y CN U2008200544496 U CNU2008200544496 U CN U2008200544496U CN 200820054449 U CN200820054449 U CN 200820054449U CN 201225297 Y CN201225297 Y CN 201225297Y
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- power supply
- fan
- blower fan
- utility
- changeover device
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Abstract
The utility model relates to a DC fan using an AC supply, which comprises a DC motor, a stator core, an impeller and a power supply changeover device, wherein the power supply changeover device converts input the AC supply into a DC supply which is output to the DC motor for driving the DC motor to rotate. The utility model integrates the advantages of convenient applied supply of an AC fan and small power, heavy wind rate and static wind pressure of the DC fan, and has wide market prospect.
Description
Technical field
The utility model relates to axial-flow blower, relates in particular to a kind of small-power dc fan that uses ac power supply work.
Background technique
Axial-flow blower is used for needs and ventilates and each occasion of cooling off, comprises every field such as PC, electric equipment and factory installation.Axial-flow blower generally includes a mutliblade impeller, and these blades are clocklike around the hub member setting; Rotor; Stator iron core and housing, protective housing etc.When impeller during by the motor driving of blower fan, the air pressure by blade lowers, and causes producing air and moves to blower fan continuously.Then, fan blade rising pressure promotes the rear of air from blower fan laterally, and the air that moves produces air-flow, and this air-flow plays and ventilates and cooling action.
Obviously, the air quantity of this air-flow is big more, and the heat dissipation potential of blower fan is also high more.This is because the thermal capacitance of air is certain, bigger air quantity, and just more air can be taken away more heat in the unit time.Therefore under the identical situation of radiating fin material, mikey volume, air quantity is the most direct performance index of weighing the blower fan heat dissipation potential.Air quantity refers to that the blower fan per minute is sent or the inhaled air total volume, if calculate by cubic feet, unit is exactly CFM; If calculate by cubic meter, be exactly CMM, the air quantity unit that the heat radiation product often uses is CFM.
Fan blade is big more, and rotating speed is high more, and its CFM is just high more, so rotating speed also is one of performance index of weighing the blower fan heat dissipation potential.Rotation speed of fan is meant the number of times of the blade per minute rotation of blower fan, and unit is: rev/min (rpm).Blade rotational speed by the quantity of the number of turn of motor interior loop, operating voltage, fan blade, inclination angle, highly, diameter and bearing arrangement determine jointly.Under the situation that blower fan structure is fixed and temperature rise and voltage allow, the rotating speed of dc fan (promptly using galvanic blower fan) changes synchronously with the variation of operating voltage.
But too high rotating speed can cause bigger noise, causes people's discomfort.Therefore, the static blast of blower fan also is an important indicator of weighing fan performance.The unit of static blast is a handkerchief, and static blast is big more, and it is good more to dispel the heat.
Existing small-power axial-flow blower is divided into two classes, and a class is an AC blower fan, is characterized in: the power height of blower fan, and air quantity is little, and static blast is little.An other class is a dc fan, is characterized in: the power of blower fan is low, and air quantity is big, and static blast is big.But dc fan can't use civil power (Ac just) work.
Therefore, exist a kind of demand in the industry: use general Ac to be working power, reach the axial flow motor of low-power, big air quantity and big static blast.
Summary of the invention
The utility model provides a kind of dc fan that uses ac power supply, and its technological scheme that adopts is as follows:
A kind of dc fan that uses ac power supply comprises:
Direct current generator; Be arranged at the stator iron core in the direct current generator; Impeller is connected with stator iron core; Housing is arranged on impeller outer;
On the top of housing one power supply changeover device is set, an end of this power supply changeover device connects ac power supply, and the other end is connected with the direct current generator circuit, and the input voltage of power supply changeover device is that scope is 85 volts-264 volt AC voltages, and output voltage is a VDC.
The utility model has the advantages that:
1. air quantity is big: the blower fan with 120*120*38t (mm) specification is an example, adopts the 220V Ac equally, and the air quantity of AC blower fan is 80CFM, and fan delivery of the present utility model can reach 180CFM;
2. static pressure is big: the blower fan with 120*120*38t (mm) specification is an example, adopts the 220V Ac equally, and the static pressure of AC blower fan is 0.3inch/H
2O, blower fan static pressure of the present utility model is increased to 0.6 inch/H
2O;
3. rotating speed is big: the blower fan with 120*120*38t (mm) specification is an example, adopts the 220V Ac equally, and the rotating speed of AC blower fan is 2700RPM, and rotation speed of fan of the present utility model can reach 3800RPM;
4. power little (energy saving): the blower fan with 120*120*38t (mm) specification is an example, adopts the 220V Ac equally, is reaching identical 80CFM air quantity and 0.3inch/H
2During O, the power of common AC blower fan is 20-22W, and power of fan of the present utility model can be reduced to 7-8W.
Description of drawings
Below in conjunction with accompanying drawing,, will make the technical solution of the utility model and other beneficial effects apparent by detailed description to embodiment of the present utility model.
Fig. 1 is the utility model schematic representation;
Fig. 2 is an embodiment's being connected with DC brushless direct-current blower fan internal circuit board of the utility model power supply changeover device a circuit diagram;
Fig. 3 is another embodiment's of being connected with DC brushless direct-current blower fan internal circuit board of the utility model power supply changeover device a circuit diagram.
Embodiment
In order further to understand feature of the present utility model, see also following about detailed description of the present utility model and accompanying drawing, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for protection domain of the present utility model is limited.
As shown in Figure 1, be product diagram of the present utility model.Axial-flow blower of the present utility model comprises: direct current generator 101, stator iron core 102, impeller 103, housing 104, a power supply changeover device 105 is set on housing 104, and it is converted to the Ac of being imported and drives the direct current that direct current generator 101 rotates, through stator iron core 102, the rotation impeller 103 of direct current generator 101 is rotated, and plays the effect of ventilating with cooling.
Power supply changeover device 105 can be arranged on the top of dc fan housing 4.
The input voltage of power supply changeover device 5 can adopt: 85V-264V Ac or a certain fixedly alternating voltage.
Direct current generator 101 can adopt brshless DC motor.
Fig. 2 is connected one of them embodiment's circuit diagram with DC brushless direct-current blower fan internal circuit board for the utility model power supply changeover device.Present embodiment adopts the 85V-264V Ac.Mains supply 201 enters power supply changeover device 105, through EMI circuit 202, rectifying and wave-filtering 203, Power Conversion 204, rectifying and wave-filtering 205, by output module 206 output DCs, drives 207 work of brush DC blower fan.Sampling module 208 connects direct current output modules 206, and the magnitude of voltage of current output DC is offered mu balanced circuit 209, adjusts Power Conversions 204 by PWM controller 210, guarantees that the dc voltage value of being exported is constant.Because of adopting general Ac is working power, and is converted to the running of dc powered brushless direct-current blower fan by power supply changeover device 5, therefore, has both possessed the advantage of dc fan low-power, big air quantity and big static blast, also possesses the advantage that the AC blower fan power supply is popularized.
Fig. 3 is another embodiment's of being connected with DC brushless direct-current blower fan internal circuit board of the utility model power supply changeover device a circuit diagram.Present embodiment adopts the Ac of fixed voltage value.Mains supply 301 enters power supply changeover device 5, through capacitance decompression module 302, rectifying and wave-filtering 303, by output module 304 output DCs, drives 305 work of brush DC blower fan.Because of adopting general Ac is working power, and is converted to the running of dc powered brushless direct-current blower fan by power supply changeover device 5, therefore, has both possessed the advantage of dc fan low-power, big air quantity and big static blast, also possesses the advantage that the AC blower fan power supply is popularized.
Should be understood that; above-mentioned detailed description to embodiment is only in order to understand the utility model; for those of ordinary skills; can be improved according to the above description or conversion; for example power supply changeover device 105 can be arranged on the top of housing 104; also can be arranged at other positions such as left side, rear portion, so long as reach all improvement of this purpose and the protection domain that conversion all should belong to the utility model claims.
Claims (2)
1. dc fan that uses ac power supply comprises:
Direct current generator;
Be arranged at the stator iron core in this direct current generator;
Impeller is connected with this stator iron core;
Housing is arranged on this impeller outer; It is characterized in that,
On the top of this housing one power supply changeover device is set, one end of this power supply changeover device connects ac power supply, the other end is connected with this direct current generator circuit, and the input voltage of this power supply changeover device is that scope is 85 volts-264 volt AC voltages, and output voltage is a VDC.
2. the dc fan of use ac power supply according to claim 1 is characterized in that, this direct current generator is a brshless DC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200544496U CN201225297Y (en) | 2008-01-04 | 2008-01-04 | DC fan using AC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200544496U CN201225297Y (en) | 2008-01-04 | 2008-01-04 | DC fan using AC power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201225297Y true CN201225297Y (en) | 2009-04-22 |
Family
ID=40598183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200544496U Expired - Lifetime CN201225297Y (en) | 2008-01-04 | 2008-01-04 | DC fan using AC power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201225297Y (en) |
-
2008
- 2008-01-04 CN CNU2008200544496U patent/CN201225297Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090422 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Kagu Electric Equipment Co., Ltd., Shanghai Document name: Notification of Expiration of Patent Right Duration |
|
| DD01 | Delivery of document by public notice |