CN105673539A - Single-phase axial-flow ventilator - Google Patents
Single-phase axial-flow ventilator Download PDFInfo
- Publication number
- CN105673539A CN105673539A CN201610208187.3A CN201610208187A CN105673539A CN 105673539 A CN105673539 A CN 105673539A CN 201610208187 A CN201610208187 A CN 201610208187A CN 105673539 A CN105673539 A CN 105673539A
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- China
- Prior art keywords
- motor
- phase
- access
- circuit
- impeller
- Prior art date
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- 230000002457 bidirectional effect Effects 0.000 claims description 18
- 238000009423 ventilation Methods 0.000 claims description 16
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000005070 sampling Methods 0.000 description 7
- 230000036772 blood pressure Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Motor And Converter Starters (AREA)
- Control Of Multiple Motors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a single-phase axial-flow ventilator. The single-phase axial-flow ventilator comprises an axial-flow impeller and a single-phase electromotor for directly driving the impeller, wherein the diameter of the impeller is less than or equal to 250mm, and the impeller is provided with 3 to 9 blades; and a rated speed is not lower than 700 r/m. The single-phase axial-flow ventilator also comprises a control circuit board, wherein the electromotor is enabled to be connected with a single-phase power supply by virtue of a thyristor; and the current of the electromotor is continuously measured, and a shifting-phase angle of the thyristor is controlled according to the current feedback. By virtue of the design, various influences can be weakened, and the air volume of the ventilator is stabilized.
Description
Technical field
The present invention relates to a kind of single-phase axial fan, particularly relate to the cooperation of its machinery, motor and circuit structure, in International Patent Classification (IPC), classification can belong to F04D25/08, F04D19/00 and F04D17/08.
Background technology
Traditional single-phase ventilator air performance is partially soft, when its air outlet is in face of strong reverse wind direction open air aerofluxus, actual air volume is decreased obviously than nominal air quantity, or in air inlet or/and air outlet connect pipeline to carry air time, the on-way resistance of air-flow is also made the actual air volume quantity positive correlation less than nominal air quantity, the degree of reduction and the length of pipeline and elbow by pipeline. Due to air outlet of ventilator place environment disunity and air inlet thereof or/and the quantity of the length of pipeline that connects of air outlet and elbow is relevant with installation site. This result in ventilation blower specifically used time the uncertainty of actual air volume, affect Design of ventilation and practical effect. Small compact radial ventilation blower is proposed, with regard to this problem, the method for being effectively improved by the present inventor earlier application ZL201210237445.2, but the method is inapplicable to the axial fan that air performance is different.
Summary of the invention
The technical problem to be solved is, it is proposed to a kind of single-phase axial fan, the situation of the deviation product nominal air quantity that can be effectively improved under use state actual air volume.
This invention address that the technical scheme of described technical problem is, a kind of single-phase axial fan, including aial flow impeller and the single-phase motor directly driving this impeller, it is characterised in that:
Described impeller diameter is within 250mm, the number of blade 3～9;
Rated speed is not less than 700r/m;
Also include control circuit plate, make described motor be access to single phase poaer supply through IGCT; It measures continuously electric current of motor, and described in this Current Feedback Control the phase shifting angle of IGCT.
Owing to the air quantity of ventilation blower is proportional to the rotating speed of impeller, the electric current of the rotating speed inverse ratio motor of impeller, the phase shifting angle of the electric current inverse ratio IGCT of motor, namely the design of this Current Feedback Control can weaken various impacts described in background technology, stablizes the air quantity of ventilation blower.
It designs further, described control circuit plate includes: single phase poaer supply input, connect the circuit output end of single-phase motor, bidirectional thyristor, have and hold altogether and the electronic control circuit of this DC power supply terminal held altogether, signal input part and control output end relatively; And:
One of circuit output end of described connection single-phase motor is access to a pole of described single phase poaer supply input, this outfan once Opposite direction connection diode, dropping resistor and at least include a Zener diode branch road and the parallel circuit of a filter capacitor branch road, be access to another pole of single phase poaer supply input;
In described parallel circuit two common node, high potential person connects described DC power supply terminal, and relatively electronegative potential person connects described end altogether;
2nd main electrode of described bidirectional thyristor is access to described high potential common node through current sense resistor, and the 1st main electrode is access to the two of the circuit output end of described connection single-phase motor;
The junction point of described bidirectional thyristor the 2nd main electrode and current sense resistor is access to described signal input part;
The control pole of described bidirectional thyristor is access to described control output end.
In above-mentioned control circuit plate:
By Ohm's law, the voltage on current sense resistor is proportional to the electric current passed through;
By kirchhoff the 2nd law, the junction point of IGCT the 2nd main electrode and the current sense resistor voltage to holding altogether, namely superpose sum equal to the DC power supply terminal voltage to holding altogether with the voltage drop on current sense resistor;
DC power supply terminal is to holding the voltage constant for Zener diode and filter capacitor parallel circuit altogether.
Therefore, voltage on current sense resistor is clamped in based on the direct current power source voltage held altogether, to its measure required altogether and clamper problem by dexterously in conjunction with solution, namely IGCT the 2nd main electrode and the junction point of current sense resistor successfully export corresponding single-phase motor alternating current and can by usual voltage as measured by single-chip microcomputer one electron-like control circuit to described electronic control circuit. Having the technical effect that of this design
Resistance blood pressure lowering sampling is used to compare the traditional current transformer of use or up-to-date current sensor special chip, less costly and small volume;
Save if single-chip microcomputer one electron-like control circuit is at the commonly required pretreatment circuit of Measuring Alternating Current Signal, as used the clamp circuit etc. of resistance, electric capacity and diode combinations or operational amplifier, except can reducing cost, also measurement can be had and respond faster, improve reliability.
The design further of this circuit board is that the junction point of described bidirectional thyristor the 2nd main electrode and current sense resistor is access to described signal input part through a bleeder circuit. This bleeder circuit can make described signal input part obtain the signal amplitude being suitable for. The lower resistance of this bleeder circuit capacitor that preferably parallel connection one is suitable, with filtering interfering.
When described impeller diameter is within 150mm, described motor adopts shaded-pole motor, less costly and have good speed adjusting performance.
When described impeller diameter is more than 150mm, described motor adopts permanent split capacitor motor, has higher efficiency.
Technical scheme and effect will be further described in conjunction with accompanying drawing in a specific embodiment.
Accompanying drawing explanation
Fig. 1 is the basic frame for movement master map of embodiment of the present invention ventilation blower;
Fig. 2 is embodiment of the present invention ventilation blower circuit board control circuit schematic diagram.
Detailed description of the invention
The present invention the 1st embodiment ventilator structure is as shown in Figure 1, it is improve to form on the basis of embodiment 1 ventilation fan described in the present inventor's earlier application 200910038848.2, mainly include the motor 2 being fixed on casing 3 and the aial flow impeller 1 being connected to this motor output shaft, major improvement is that:
Motor 2 changes Shading-pole Induction Motor into;
Impeller 1 diameter is 125mm, has 4 blades, rated speed 1400r/m; Other rotating speed, diameter and 3,5 or 6 blades can also be designed as by air performance requirement, but not more than 9 blades, diameter is not larger than 250mm;
Extension circuit plate 4 in casing 3, and by external electrical network alternating current power supply after tradition ventilation blower original terminal board input namely to motor, change into and powering to motor 2 through circuit board 4.
The control circuit of circuit board 8 is as in figure 2 it is shown, specifically include that
Single phase poaer supply input, its 2 pole respectively AC_INPUT1 and AC_INPUT2;
Connect the circuit output end of single-phase motor, its 2 pole respectively MOTOR11 and MOTOR12;
Bidirectional thyristor Q1;
Single-chip microcomputer U1, its 8th foot is lower margin VSS altogether, and the 1st foot is DC source foot VDD, and the 2nd～7 foot is the I/O port being numbered GP0～GP5.
In figure:
One pole AC_INPUT1 of single phase poaer supply input connects one of the outfan of single-phase motor MOTOR11 through Thermal Cutoffs F1, this junction point, through the diode D1 of Opposite direction connection, resistance R11 and R12, the circuit that is formed in parallel by Zener diode DZ1, filter capacitor C7 and C8, resistance R16, is access to another pole AC_INPUT2 of single phase poaer supply input;
Above-mentioned parallel circuit two common node, with dropping resistor R12 junction point person for the present embodiment circuit hold GND altogether, its connect single-chip microcomputer U1 the 8th foot namely be total to lower margin VSS; Another common node connects single-chip microcomputer U1 the 1st foot and DC source foot VDD, as the DC power supply terminal VCC of the present embodiment circuit. Filtering due to the rectification of diode D1, the blood pressure lowering of resistance R11 and R12, the voltage stabilizing of Zener diode DZ1 and filter capacitor C7, C8, hold between GND and DC power supply terminal VCC altogether above-mentioned, formed with DC power supply terminal VCC to hold altogether GND (hereinafter referred to as " and ") for the direct current power source voltage of positive 5V, work for single-chip microcomputer U1;
2nd main electrode (i.e. commonly called T2) of bidirectional thyristor Q1 is access to DC power supply terminal VCC through current sense resistor R22; 1st main electrode (i.e. commonly called T1) is access to above-mentioned connection single-phase motor another outfan MOTOR12;
2nd main electrode of bidirectional thyristor Q1 and the junction point of current sense resistor R22 are connected the I/O port GP4 of single-chip microcomputer U1 through resistance R24. GP4 is simultaneously through resistance R23 and electric capacity C10 earth. Resistance R24 and R23 constitutes the differential pressure drop volt circuit to described junction point voltage sampling over the ground. Electric capacity C10 plays Anti-Jamming;
The pole that controls of bidirectional thyristor Q1 is access to the I/O port GP2 of single-chip microcomputer through resistance R19;
One pole AC_INPUT1 of single phase poaer supply input is connected in series the I/O port GP1 of single-chip microcomputer U1 through the junction point of one of the outfan MOTOR11 of fuse F1 and single-phase motor through resistance R9, R10, GP1 is simultaneously through resistance R18 ground connection, and resistance R24 and R23 constitutes the differential pressure drop volt circuit of the voltage sampling over the ground of the power supply to the pole AC_INPUT1 from single phase poaer supply input. GP1 connects DC power supply terminal VCC through resistance R17 simultaneously and constitutes the upper clamper needed for Measuring Alternating Current Signal through electric capacity C9 ground connection. Electric capacity C9 plays Anti-Jamming;
The A place of the 1st main electrode connection single-phase motor another outfan MOTOR12 of bidirectional thyristor Q1 is connected in series the I/O port GP0 of single-chip microcomputer U1 through resistance R20, R13, GP0 is simultaneously through resistance R14 ground connection, and resistance R20 and R13 constitutes the differential pressure drop volt circuit to the voltage sampling over the ground of the motor from A place. GP0 connects DC power supply terminal VCC through resistance R15 simultaneously and constitutes the upper clamper measured needed for alternating voltage through electric capacity C6 ground connection. Electric capacity C6 plays Anti-Jamming;
One pole AC_INPUT1 of single phase poaer supply input is also connected in series the I/O port GP5 of single-chip microcomputer U1 through the junction point of one of the outfan MOTOR11 of fuse F1 and single-phase motor through resistance R7, R8, therefore coordinate the structure of I/O port after making alternating current power supply blood pressure lowering, provide to GP5 and control zero cross signal Tong Bu with AC supply voltage needed for bidirectional thyristor Q1 triggers.GP5, simultaneously through capacitor C5 ground connection, plays Anti-Jamming;
Single-chip microcomputer U1 plug-in, the I/O port GP2 making single-chip microcomputer exports the triggering pulse with variable phase shifting angle according to input and the plug-in of other I/O port, control the conducting of bidirectional thyristor Q1, thus startup and the operating of the single-phase motor of circuit output end MOTOR11, MOTOR12 can be controlled to be connected to by the electric current of the motor measured continuously. Such as, when the gas-flow resistance of ventilation blower increases, the rotating speed of single-phase motor will reduce and electric current increases, by the I/O port GP4 of single-chip microcomputer U1, the plug-in of single-chip microcomputer U1 detects that the phase shifting angle triggering pulse that the voltage signal of current sense resistor R22 makes GP2 export reduces, the angle of flow of bidirectional thyristor Q1 thus increase, the supply voltage that single-phase motor obtains increases, and makes the rotating speed of single-phase motor recover, thus stablizing air quantity.
This circuit use resistance sampling measure electric current have certain power attenuation and thus heating, should be noted by single-chip I/O mouth performance select alap sampling voltage, meet the needs of engineering survey precision. Small size motor within input power tens of watts, suitably selects sampling voltage, and this power attenuation can be limited within the 1% of motor input power. When motor rated voltage is higher, electric current is also less, and this power attenuation can be lower.
The precision of this circuit dc power voltage relies on Zener diode, should be noted its precision of voltage regulation. The needs of the engineering survey precision of the voltage clamp that common Zener diode can meet in general electrical equipment on current sense resistor.
One of the following design belonged within scope can be had to change:
Thermal Cutoffs F1 can change the protection device or circuitry instead of being located at external circuit into, i.e. one of pole AC_INPUT1 outfan being directly connected to single-phase motor of single phase poaer supply input MOTOR11;
Diode D1, dropping resistor R11 and R12 series sequence can be any;
The electronic control circuit that is made up of discrete component replaces single-chip microcomputer, is formed and single automatically adjusts the closed loop feedback control at turn on thyristors angle detect motor current, and cost can be relatively low;
Motor adopts permanent split capacitor motor, the situation that suitable impeller diameter is bigger.
Experiments show that, the single-phase ventilation blower of the embodiment of the present invention has good constant wind dose-effect fruit.
Claims (6)
1. a single-phase axial fan, including aial flow impeller and the single-phase motor directly driving this impeller, it is characterised in that:
Described impeller diameter is within 250mm, the number of blade 3～9;
Rated speed is not less than 700r/m;
Also include control circuit plate, make described motor be access to single phase poaer supply through IGCT; It measures continuously electric current of motor, and described in this Current Feedback Control the phase shifting angle of IGCT.
2. ventilation blower described in claim 1, it is characterized in that, described control circuit plate includes: single phase poaer supply input, connect the circuit output end of single-phase motor, bidirectional thyristor, has and holds altogether and the electronic control circuit of this DC power supply terminal held altogether, signal input part and control output end relatively; It is characterized in that:
One of circuit output end of described connection single-phase motor is access to a pole of described single phase poaer supply input, this outfan once Opposite direction connection diode, dropping resistor and at least include a Zener diode branch road and the parallel circuit of a filter capacitor branch road, be access to another pole of single phase poaer supply input;
In described parallel circuit two common node, high potential person connects described DC power supply terminal, and relatively electronegative potential person connects described end altogether;
2nd main electrode of described bidirectional thyristor is access to described high potential common node through current sense resistor, and the 1st main electrode is access to the two of the circuit output end of described connection single-phase motor;
The junction point of described bidirectional thyristor the 2nd main electrode and current sense resistor is access to described signal input part;
The control pole of described bidirectional thyristor is access to described control output end.
3. ventilation blower described in claim 2, it is characterised in that: the junction point of described bidirectional thyristor the 2nd main electrode and current sense resistor is access to described signal input part through a bleeder circuit.
4. ventilation blower described in claim 3, it is characterised in that: lower resistor coupled in parallel one capacitor of described bleeder circuit.
5. ventilation blower described in any one of Claims 1 to 4, it is characterised in that: described impeller diameter is within 150mm, and described motor is shaded-pole motor.
6. ventilation blower described in any one of Claims 1 to 4, it is characterised in that: described impeller diameter is more than 150mm, and described motor is permanent split capacitor motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208187.3A CN105673539B (en) | 2016-04-05 | 2016-04-05 | A kind of single-phase axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208187.3A CN105673539B (en) | 2016-04-05 | 2016-04-05 | A kind of single-phase axial fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105673539A true CN105673539A (en) | 2016-06-15 |
| CN105673539B CN105673539B (en) | 2018-03-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610208187.3A Active CN105673539B (en) | 2016-04-05 | 2016-04-05 | A kind of single-phase axial fan |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5598071A (en) * | 1994-07-11 | 1997-01-28 | Seagate Technology | Method for starting and commutating a permanent-magnet direct current motor having a single phase winding |
| CN2829209Y (en) * | 2005-09-08 | 2006-10-18 | 单庚明 | Fan of exhaust fan |
| CN102130650A (en) * | 2011-01-07 | 2011-07-20 | 叶露微 | Method for testing and adjusting single-phase capacitor motor |
| CN102330702A (en) * | 2011-10-04 | 2012-01-25 | 叶露微 | Low-power ventilating fan |
| CN102828975A (en) * | 2012-07-06 | 2012-12-19 | 叶露微 | Low-power ventilator |
| CN105071721A (en) * | 2015-08-05 | 2015-11-18 | 叶露微 | Small-power ventilation fan directly driven by micro permanent magnet synchronous motor |
-
2016
- 2016-04-05 CN CN201610208187.3A patent/CN105673539B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5598071A (en) * | 1994-07-11 | 1997-01-28 | Seagate Technology | Method for starting and commutating a permanent-magnet direct current motor having a single phase winding |
| CN2829209Y (en) * | 2005-09-08 | 2006-10-18 | 单庚明 | Fan of exhaust fan |
| CN102130650A (en) * | 2011-01-07 | 2011-07-20 | 叶露微 | Method for testing and adjusting single-phase capacitor motor |
| CN102330702A (en) * | 2011-10-04 | 2012-01-25 | 叶露微 | Low-power ventilating fan |
| CN102828975A (en) * | 2012-07-06 | 2012-12-19 | 叶露微 | Low-power ventilator |
| CN105071721A (en) * | 2015-08-05 | 2015-11-18 | 叶露微 | Small-power ventilation fan directly driven by micro permanent magnet synchronous motor |
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| Publication number | Publication date |
|---|---|
| CN105673539B (en) | 2018-03-30 |
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| CB03 | Change of inventor or designer information |
Inventor after: Ye Luwei Inventor after: Qu Yaohan Inventor before: Ye Luwei |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180213 Address after: 529200 Guangdong Province, Jiangmen city Pengjiang District Binjiang Road No. 1 gold Linglu Applicant after: JiangMen JinLing Fan Manufactorying Co., Ltd. Address before: 529020 Guangdong East Road, Pengjiang District, East dike Bay Garden, one of the buildings, 102, 4, Applicant before: Ye Luwei |
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