CN102828975B - Low-power ventilator - Google Patents
Low-power ventilator Download PDFInfo
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- CN102828975B CN102828975B CN201210237445.2A CN201210237445A CN102828975B CN 102828975 B CN102828975 B CN 102828975B CN 201210237445 A CN201210237445 A CN 201210237445A CN 102828975 B CN102828975 B CN 102828975B
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Abstract
A low-power ventilator comprises an impeller, a motor and a power supply device of the motor. The impeller is directly driven by the motor. The low-power ventilator is characterized in that the impeller is a centrifugal impeller, the diameter of the impeller is not larger than 200mm, the quantity of blades of the impeller ranges from 25 to 50, the rated rotational speed of the impeller is not lower than 950r/m, and the impeller further comprises a volute surrounding the impeller and an air outlet connected with an external pipeline. The motor is a permanent-magnetic direct-current motor. The power supply device comprises a group of single-phase alternating-current power supplies, each single-phase alternating-current power supply supplies power to an alternating-current input end of a single-phase rectifier after being serially connected with a resistor, and a direct-current output end of the rectifier is connected to a power input end of the permanent-magnetic direct-current motor. According to the design, the air quantity of the low-power ventilator can be stabilized by automatically adjusting power voltage outputted to the permanent-magnetic direct-current motor in a simple mode.
Description
Technical field
The present invention relates to a kind of low power ventilation 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 technique
Actual air volume when traditional low power ventilation fan specifically uses is often lower than the nominal air quantity of product, and the degree that air quantity declines is relevant with the state of exhaust outlet with the intake grill of ventilator.First, the air quantity under concrete use installment state is relevant with the pressure difference of exhaust outlet place air ambient with the intake grill of ventilator.Such as, when the exhaust outlet of ventilator is in face of strong reverse wind direction open air exhaust, namely its actual air volume obviously declines than the nominal air quantity of product.Pipe type ventilator is usually in intake grill or/and exhaust outlet connecting tube is to carry air, the nominal air quantity that pipeline will make the actual air volume specifically installed and used under state be less than product to the on-way resistance of air-flow, its degree reduced and the length of pipeline and the quantity positive correlation of elbow.Due to air outlet of ventilator place environment and disunity and intake grill thereof or/and the quantity of the length of pipeline that connects of exhaust outlet and elbow is relevant with installation site.The uncertainty of actual air volume when this just causes ventilator specifically to use, affects Design of ventilation and practical effect.
Summary of the invention
Technical problem to be solved by this invention is, proposes a kind of low power ventilation fan, and it compares traditional low power ventilation fan can improve the situation that actual air volume under using state departs from product nominal air quantity.
The technological scheme that the present invention solve the technical problem is, a kind of low power ventilation fan, comprising: impeller, the motor of this impeller of Direct driver, the power supply unit of this motor; It is characterized in that:
---described impeller is receded disk impeller, and impeller diameter is within 200mm, the number of blade 25 ~ 50, and rated speed is not less than 950r/m, also comprises the volute of wound impeller and is connected the exhaust outlet of external pipe;
---described motor is permanent magnet direct current motor; Described power supply unit comprises one group of single phase alternating current power supply; Power to the ac input end of a single-phase rectifier after the source-series impedance of this single-phase alternating current, the DC output end of this rectifier is access to the power input of described permanent magnet direct current motor.
The ingenious part of this design is, can utilize the characteristic of connected resistance fit permanent magnet direct current motor in centrifugal fan, in a simple manner decoupled automatically the supply voltage that exports to permanent magnet direct current motor of adjustment with the air quantity of stable ventilator:
---the characteristic of small compact radial ventilator is that the input current making motor under original input voltage while the increase of air output resistance reduces down to the air quantity under the pressure produced at original rotating speed reduces.The reduction of this electric current makes the voltage drop in connected impedance reduce, and under identical power supply voltage, thus the input voltage of motor improves.Even if the rotating ratio Wechselstrommotor of the voltage permanent magnet direct current motor of this raising significantly improves, thus the pressure of ventilator improve.The pressure of this raising overcomes being conducive to the air output resistance increased described ventilator, and the air quantity of ventilator is kept.
One of modular design of this technological scheme is: described single phase alternating current power supply is for connecting external power supply one phase terminal and a neutral line terminal; Described permanent magnet direct current motor is low voltage permanent magnetic brushless direct current motor, and described single-phase rectifier is bridge rectifier; Described impedance is AC capacitor, described phase terminal is access to described bridge rectifier one ac input end through this AC capacitor, another ac input end of described bridge rectifier is access to neutral line terminal, and the DC output end of described bridge rectifier is access to the power input of described low voltage permanent magnetic brushless direct current motor.
The permanent magnet direct current motor of low voltage can obtain more stable input current in the power supply circuits of series impedance step-down, namely can have more stable Driving Torque, thus stablize the air quantity of ventilator according to the principle of motor.Adopt AC capacitor as impedance, reliable operation and cost is lower.
Two of the modular design of this technological scheme is: described single phase alternating current power supply is for connecting external power supply one phase terminal and a neutral line terminal; Described permanent magnet direct current motor is low voltage permanent magnetic brushless direct current motor, and described single-phase rectifier is the half-wave rectifier be made up of the 1st diode and the 2nd diode; Described impedance is AC capacitor, described phase terminal is access to the 1st diode one pole through this AC capacitor, 1st another pole of diode is access to a terminal of the power input of described low voltage permanent magnetic brushless direct current motor, and described neutral line terminal is access to another terminal of the power input of described low voltage permanent magnetic brushless direct current motor; 2nd diode one pole is access to neutral line terminal, and another pole is access to the joint of described AC capacitor and the 1st diode, and in this joint, the polarity of the 1st diode is contrary with the polarity of the 2nd diode.
One way rectifier compares that full wave rectifier structure is simple and cost is low, but the AC ripple that direct current exports is larger.
In order to alleviate the pulsation that rectification exports, preferably at the electrolytic condenser of the power input of a motor enough capacity in parallel.In addition be that described AC capacitor is preferably parallel with discharge resistance, in order to maintenance safety.
Technological scheme of the present invention and effect will be further described in a specific embodiment by reference to the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the basic mechanical structure plan view of embodiment of the present invention ventilator;
Fig. 2 is the embodiment of the present invention 1 blower motor control circuit schematic diagram;
Fig. 3 is the embodiment of the present invention 2 blower motor control circuit schematic diagram;
Fig. 4 is the embodiment of the present invention 1 ventilator and improvement front ventilator performance characteristic comparison diagram.
Embodiment
The basic mechanical structure of embodiment of the present invention ventilator as shown in Figure 1, is improve to form on a traditional centrifugal free air inlet type pipe type ventilator of family expenses small-power.This fan impeller is centrifugal, diameter 200mm, the number of blade 32, rated speed 1380r/m; Also can change less diameter, more blade (within 50) and higher rotating speed into, exhaust outlet adapter nominal length is 3m.Main improvement comprises:
---be fixed on the motor 17 of casing, change by former Wechselstrommotor the brushless, permanently excited direct current motor that voltage rating is the included brushless commutating circuit of 18V into;
---add circuit board 8 and AC capacitor 13.
---after the original terminal board 6 of all blower fans of external electrical network ac power supply autobiography inputs, change into through AC capacitor 13 step-down and circuit board 8 rectification, change DC low-voltage into, power to motor 17.
In this ventilator, motor 17 drives original receded disk impeller 3 to operate in the spiral case of wound impeller, indoor air passes through original decoration panel 4 and enters impeller 3 from the intake grill 5 of spiral case, through impeller 3 after accelerating in volute, discharges from the exhaust outlet 2 of original connection external pipe.
The control circuit of the embodiment of the present invention 1 ventilator as shown in Figure 2, the original phase terminal 11 of tradition ventilation machine changes into and is access to bridge rectifier 15 1 ac input end through AC capacitor 13, another ac input end of bridge rectifier 15 is access to original neutral line terminal 12, and the DC output end of bridge rectifier 15 presses two poles of polarity connection toward motor 17 power input respectively.In addition, the DC output end of bridge rectifier 15 is parallel with the electrolytic condenser 16 of larger capacity; AC capacitor 13 is parallel with discharge resistance 14, and the electric charge accumulated when AC capacitor of releasing during for shutting down 13 is energized, with electric shock-preventing.In ventilator, it is constant that phase terminal 11 and neutral line terminal 12 are positioned at Fig. 1 middle connecting terminal plate 6, and bridge rectifier 15, electrolytic condenser 16 and discharge resistance 14 are installed on circuit board 8 shown in Fig. 1.
The control circuit of the embodiment of the present invention 2 ventilator as shown in Figure 3, it compares the circuit of the 1st embodiment's ventilator shown in Fig. 2, mainly former bridge rectifier 15 changes into the half-wave rectifier be made up of diode 18 and diode 19: phase terminal 11 is access to diode 18 1 pole through AC capacitor 13, another pole of diode 18 is access to a terminal of the power input of motor 17, and neutral line terminal 12 is access to another terminal of the power input of motor.One pole of diode 19 is access to neutral line terminal 12, and another pole is access to the joint of AC capacitor 13 and diode 18, and in this joint, the polarity of diode 19 is contrary with the polarity of diode 18.
Fig. 4 is the embodiment of the present invention 1 ventilator and prior art ventilator performance characteristic comparison diagram.In figure, curve A is the drag characteristic of the long airduct of 3m, curve B is the drag characteristic of the long airduct of 5m, curve C is the air quantity of prior art ventilator---Pressure characteristics, curve D is the air quantity of the embodiment of the present invention 1 ventilator---Pressure characteristics, and A, B are the operation point under ventilator adapter working state respectively with the intersection point of C, D.Can find out, when keeping nominal air delivery (air quantity during zero pressure) identical, the rated pressure (pressure during zero air quantity) of the embodiment of the present invention 1 ventilator increases substantially than prior art ventilator; And under adapter working state rated pressure (pressure during zero air quantity) increase substantially than prior art ventilator; Under the embodiment of the present invention 1 ventilator adapter working state, the air quantity of operation point also increases than prior art ventilator, especially the embodiment of the present invention 1 ventilator connect the long external pipe of 5m than the fall connecing 3m long external pipe air quantity (see instruction line segment F) compared to existing technology ventilator connect the long external pipe of 5m and have obvious minimizing than the fall (see indicating line segment E) connecing 3m long external pipe air quantity, namely air quantity is more stable.
The motor that the embodiment of the present invention uses is brushless, permanently excited direct current motor, in fact also can for there being the permanent magnet direct current motor of brush, and motor also can be designed to other voltage rating, but should not higher than 36V; And may need to increase electromagnetic interference suppression circuit and excess voltage protection.
The step-down impedance that the embodiment of the present invention uses is AC capacitor, but also can be inductance element.
Claims (4)
1. a low power ventilation fan, comprising: impeller, the motor of this impeller of Direct driver, the power supply unit of this motor; It is characterized in that:
---described impeller is receded disk impeller, and impeller diameter is within 200mm, the number of blade 25 ~ 50, and rated speed is not less than 950r/m, also comprises the volute of wound impeller and is connected the exhaust outlet of external pipe;
---described motor is permanent magnet direct current motor; Described power supply unit comprises one group of single phase alternating current power supply; Power to the ac input end of a single-phase rectifier after the source-series impedance of this single-phase alternating current, the DC output end of this rectifier is access to the power input of described permanent magnet direct current motor.
2. according to ventilator described in claim 1, it is characterized in that: described single phase alternating current power supply is for connecting external power supply one phase terminal and a neutral line terminal; Described permanent magnet direct current motor is low voltage permanent magnetic brushless direct current motor, and described single-phase rectifier is bridge rectifier; Described impedance is AC capacitor, described phase terminal is access to described bridge rectifier one ac input end through this AC capacitor, another ac input end of described bridge rectifier is access to neutral line terminal, and the DC output end of described bridge rectifier is access to the power input of described low voltage permanent magnetic brushless direct current motor.
3. according to ventilator described in claim 1, it is characterized in that: described single phase alternating current power supply is for connecting external power supply one phase terminal and a neutral line terminal; Described permanent magnet direct current motor is low voltage permanent magnetic brushless direct current motor, and described single-phase rectifier is the half-wave rectifier be made up of the 1st diode and the 2nd diode; Described impedance is AC capacitor, described phase terminal is access to the 1st diode one pole through this AC capacitor, 1st another pole of diode is access to a terminal of the power input of described low voltage permanent magnetic brushless direct current motor, and described neutral line terminal is access to another terminal of the power input of described low voltage permanent magnetic brushless direct current motor; 2nd diode one pole is access to neutral line terminal, and another pole is access to the joint of described AC capacitor and the 1st diode, and in this joint, the polarity of the 1st diode is contrary with the polarity of the 2nd diode.
4. according to ventilator described in claim 2 or claim 3, it is characterized in that: a power input electrolytic condenser in parallel of described motor, described AC capacitor is parallel with resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237445.2A CN102828975B (en) | 2012-07-06 | 2012-07-06 | Low-power ventilator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237445.2A CN102828975B (en) | 2012-07-06 | 2012-07-06 | Low-power ventilator |
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| Publication Number | Publication Date |
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| CN102828975A CN102828975A (en) | 2012-12-19 |
| CN102828975B true CN102828975B (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210237445.2A Active CN102828975B (en) | 2012-07-06 | 2012-07-06 | Low-power ventilator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673539B (en) * | 2016-04-05 | 2018-03-30 | 江门市金羚排气扇制造有限公司 | A kind of single-phase axial fan |
| CN105864085B (en) * | 2016-05-02 | 2017-07-18 | 江门市金羚排气扇制造有限公司 | A kind of partition type ventilation fan |
| CN108980071B (en) * | 2018-07-01 | 2021-02-26 | 江门市金羚排气扇制造有限公司 | Low-power ventilation fan |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113692U (en) * | 1992-01-28 | 1992-08-26 | 何新法 | Clothes-hanger-type drying machine capable of heating |
| CN2145687Y (en) * | 1992-12-13 | 1993-11-10 | 胡立本 | Electric razor with dual luminotrons and self-control charging |
| CN2335334Y (en) * | 1998-07-08 | 1999-08-25 | 许津箔 | Electric-heating shoes drier |
| CN2829209Y (en) * | 2005-09-08 | 2006-10-18 | 单庚明 | Fan of exhaust fan |
| CN201039059Y (en) * | 2007-03-29 | 2008-03-19 | 许瑞琳 | AC/DC brushless DC wind blower |
| CN101539150A (en) * | 2009-04-21 | 2009-09-23 | 叶露微 | Ventilator driven by single-phase electric motor |
| EP2163833A2 (en) * | 2008-09-12 | 2010-03-17 | Delta Electronics, Inc. | Ventilator and its impeller |
-
2012
- 2012-07-06 CN CN201210237445.2A patent/CN102828975B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113692U (en) * | 1992-01-28 | 1992-08-26 | 何新法 | Clothes-hanger-type drying machine capable of heating |
| CN2145687Y (en) * | 1992-12-13 | 1993-11-10 | 胡立本 | Electric razor with dual luminotrons and self-control charging |
| CN2335334Y (en) * | 1998-07-08 | 1999-08-25 | 许津箔 | Electric-heating shoes drier |
| CN2829209Y (en) * | 2005-09-08 | 2006-10-18 | 单庚明 | Fan of exhaust fan |
| CN201039059Y (en) * | 2007-03-29 | 2008-03-19 | 许瑞琳 | AC/DC brushless DC wind blower |
| EP2163833A2 (en) * | 2008-09-12 | 2010-03-17 | Delta Electronics, Inc. | Ventilator and its impeller |
| CN101539150A (en) * | 2009-04-21 | 2009-09-23 | 叶露微 | Ventilator driven by single-phase electric motor |
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| CN102828975A (en) | 2012-12-19 |
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Owner name: JIANGMEN JINLING FAN MANUFACTORYING CO., LTD. Free format text: FORMER OWNER: YE LUWEI Effective date: 20141222 |
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Free format text: CORRECT: ADDRESS; FROM: 529020 JIANGMEN, GUANGDONG PROVINCE TO: 529000 JIANGMEN, GUANGDONG PROVINCE |
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Effective date of registration: 20141222 Address after: 529000 Guangdong Province, Jiangmen city Pengjiang District Binjiang Road No. 1 gold Linglu Applicant after: JiangMen JinLing Fan Manufactorying Co., Ltd. Address before: 529020, one of the 4 gardens in Causeway Bay, Causeway East Road, Pengjiang District, Guangdong, Jiangmen 102, China Applicant before: Ye Luwei |
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