CN103629134A - Inductive fan safety device - Google Patents
Inductive fan safety device Download PDFInfo
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- CN103629134A CN103629134A CN201210311298.9A CN201210311298A CN103629134A CN 103629134 A CN103629134 A CN 103629134A CN 201210311298 A CN201210311298 A CN 201210311298A CN 103629134 A CN103629134 A CN 103629134A
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Abstract
The invention discloses an inductive fan safety device. The inductive fan safety device is connected with a power source through a transformer, and comprises an oscillation circuit, an emitter coupling triggering circuit and an energy consumption braking circuit, wherein the power source input end of the oscillation circuit is connected with the output end of the transformer; the output end of the oscillation circuit is connected with the input end of the emitter coupling triggering circuit; the output end of the emitter coupling triggering circuit is connected with the input end of the energy consumption braking circuit; the output end of the energy consumption braking circuit is connected with a fan outer cover. The inductive fan safety device can cut off the power source when the human body approaches the position about 1cm from the fan outer cover, force a motor to stop rotating immediately, and achieve the very good safety effect.
Description
Technical field
The present invention relates to a kind of fan safety device, more relate to the induction type fan safety device that a kind of sensitivity and safety factor are higher.
Background technique
Common domestic electric fan has protective housing, but some children are for naughty, like with finger, removing to touch the blade of rotation, this just easily causes danger, and currently used fan safety device, great majority are contactors, electric fan will just can be cut off the electricity supply when falling down, therefore, safety effect does not play good effect.
Summary of the invention
Object of the present invention provides a kind of sensitivity and the higher induction type fan safety device of safety factor with regard to being in order to address the above problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention is connected with power supply by transformer, comprises oscillating circuit, emitter-base bandgap grading emitter coupled logic circuit and energy-dissipating brake circuit; The power input of wherein said oscillating circuit is connected with the output terminal of described transformer, the output terminal of described oscillating circuit is connected with the input end of described emitter-base bandgap grading emitter coupled logic circuit, the output terminal of described emitter-coupled circuit is connected with the input end of described energy-dissipating brake circuit, and the output terminal of described energy-dissipating brake circuit connects fan housing.
The structure of described oscillating circuit is: one end of the low voltage side of described transformer connects one end of the 5th diode, the other end of described the 5th diode is connected with the other end of the low voltage side of described transformer by the 7th electric capacity, one end of described the 7th electric capacity is connected with the collector electrode of the 4th triode after by the 3rd electric capacity, the emitter of described the 4th triode is connected with the other end of described the 7th electric capacity by the 7th resistance, and the two ends of described the 3rd diode are also parallel with the second relay.
The structure of described emitter-base bandgap grading emitter coupled logic circuit is: the first relay is connected the collector electrode of the 3rd triode with the one end after the second diodes in parallel, the emitter of described the 3rd triode is connected with the emitter of the second triode, described the first relay is connected with the collector electrode of described the second triode by the 5th resistance with the other end after the second diodes in parallel, the collector electrode of described the second triode is connected with the base stage of described the 3rd triode by the second resistance, the emitter of described the second triode is connected with the other end of the low voltage side of described transformer by the 3rd resistance, the base stage of described the 3rd triode is connected with the other end of the low voltage side of described transformer by the 4th resistance.
The structure of described energy-dissipating brake circuit is: inductance, the second electric capacity and the two ends after the 3rd capacitances in series are connected respectively the output terminal of described emitter-base bandgap grading emitter coupled logic circuit, the two ends of described inductance are parallel with the first electric capacity, the two ends of described the second electric capacity connect respectively the collector and emitter of the first triode, the two ends of described the 3rd electric capacity are parallel with the 6th resistance, one end of described the 6th resistance is connected with the base stage of described the first triode by the 5th electric capacity, the two ends of described the 5th electric capacity are in parallel with the second resistance, the base stage of described the first triode connects successively the first resistance and is connected with the other end of inductance after slide rheostat, the emitter of described the first triode is connected to fan housing.
Beneficial effect of the present invention is:
The present invention can cut off the electricity supply in human body proximity fan housing 1cm, and forces motor stall immediately, has played extraordinary safety effect.
Accompanying drawing explanation
Fig. 1 is structural principle block diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention is connected with power supply by transformer B, comprise oscillating circuit, emitter-base bandgap grading emitter coupled logic circuit and energy-dissipating brake circuit; The power input of wherein said oscillating circuit is connected with the output terminal of described transformer, the output terminal of described oscillating circuit is connected with the input end of described emitter-base bandgap grading emitter coupled logic circuit, the output terminal of described emitter-coupled circuit is connected with the input end of described energy-dissipating brake circuit, and the output terminal of described energy-dissipating brake circuit connects fan housing.
As shown in Figure 2: the structure of described oscillating circuit is: one end of the low voltage side of transformer B connects one end of the 5th diode D5, the other end of the 5th diode D5 is connected with the other end of the low voltage side of transformer B by the 7th capacitor C 7, one end of the 7th capacitor C 7 is connected with the collector electrode of the 4th triode BG4 afterwards by the 3rd capacitor C 3, the emitter of the 4th triode BG4 is connected with the other end of the 7th capacitor C 7 by the 7th resistance R 7, and the two ends of the 3rd diode D3 are also parallel with the second relay J 2.
As shown in Figure 2: the structure of described emitter-base bandgap grading emitter coupled logic circuit is: the first relay J 1 is connected the collector electrode of the 3rd triode BG3 with the one end after the second diode D2 parallel connection, the emitter of the 3rd triode BG3 is connected with the emitter of the second triode BG2, the first relay J 1 is connected with the collector electrode of the second triode BG2 by the 5th resistance R 5 with the other end after the second diode BG2 parallel connection, the collector electrode of the second triode BG2 is connected with the base stage of the 3rd triode BG3 by the second resistance R 2, the emitter of the second triode BG2 is connected with the other end of the low voltage side of transformer B by the 3rd resistance R 3, the base stage of the 3rd triode BG3 is connected with the other end of the low voltage side of transformer B by the 4th resistance R 4.
As shown in Figure 2: the structure of described energy-dissipating brake circuit is: inductance L, two ends after the second capacitor C 2 is connected with the 3rd capacitor C 3 are connected respectively the output terminal of described emitter-base bandgap grading emitter coupled logic circuit, the two ends of inductance L are parallel with the first capacitor C 1, the two ends of the second capacitor C 2 connect respectively the collector and emitter of the first triode BG1, the two ends of described the 3rd capacitor C 3 are parallel with the 6th resistance R 6, one end of the 6th resistance R 6 is connected with the base stage of the first triode BG1 by the 5th capacitor C 5, the two ends of the 5th capacitor C 5 are in parallel with the second resistance R 2, the base stage of the first triode BG1 connects successively the first resistance R 1 and is connected with the other end of inductance L after slide rheostat W, the emitter of the first triode BG1 is connected to fan housing.
In conjunction with Fig. 1 and Fig. 2, after switching on power, fan motor energising, electric fan is started working.The alternating voltage of 220V, after power transformer B step-down, the 5th diode D5 rectification, the 7th electric capacity D7 filtering, is supplied with each transistor and is made operating voltage.At this moment the oscillator work that the first triode BG1 etc. forms, in the 6th resistance R 6, the signal of output is added to the base stage of the second triode BG2 after the first diode D1 rectification.The emitter-base bandgap grading emitter coupled logic circuit that the second triode BG2, the 3rd triode BG3 etc. form.When having oscillator signal input, the second triode BG2 becomes saturated, and the 3rd triode BG3 limit is cut-off state, and relay J 1 is not inhaled.Now the 4th triode BG4 does not work because upper offset circuit disconnects, motor normal rotation.
When hand is during apart from fan cover 1cm, due to the existence of human body distributed capacity, be equivalent to add individual electric capacity in earthquake loop, normal resonant condition is destroyed, and circuit is failure of oscillation immediately, and the VDC of the at this moment negative pole of D1 output is down to and is approached 0V by 7V.So the second triode BG2 becomes cut-off from conducting, it is moving that the 3rd triode BG3 becomes turn-on relay J1 suction, and the normally-closed contact of circuit breaker J1-2 is opened, and has cut off the power supply of fan; The normally opened contact of circuit breaker J1-1 is closed, power supply is given the 4th capacitor C 4 chargings, this charging current makes BG4 conducting, the second relay J 2 is inhaled moving, and circuit breaker J2-1 connects, and the direct current after the 4th diode D4 rectification is added on motor, owing to being direct current, make stator produce a D.C. magnetic field, rotor is no longer rotated, so electric fan stall immediately.After one second kind, the charging current of the 4th capacitor C 4 equals zero, the 4th triode BG4 by, the second relay J 2 discharges, braking process finishes, if staff does not leave electric fan, and the first still adhesive of relay J 1, the second relay J 2 discharges, and electric fan stall is always till in one's hands leaving.
As shown in Figure 2: after the regulation of electrical circuit is good, 1., 2. lighting outlet is connect to the plug of fan power; 3., 4. connect 220V civil power; 5. be connected on the retaining screw of protective cover of electric fan.
Claims (4)
1. an induction type fan safety device, is connected with power supply by transformer, it is characterized in that: comprise oscillating circuit, emitter-base bandgap grading emitter coupled logic circuit and energy-dissipating brake circuit; The power input of wherein said oscillating circuit is connected with the output terminal of described transformer, the output terminal of described oscillating circuit is connected with the input end of described emitter-base bandgap grading emitter coupled logic circuit, the output terminal of described emitter-coupled circuit is connected with the input end of described energy-dissipating brake circuit, and the output terminal of described energy-dissipating brake circuit connects fan housing.
2. induction type fan safety device according to claim 1, it is characterized in that: the structure of described oscillating circuit is: one end of the low voltage side of described transformer connects one end of the 5th diode, the other end of described the 5th diode is connected with the other end of the low voltage side of described transformer by the 7th electric capacity, one end of described the 7th electric capacity is connected with the collector electrode of the 4th triode after by the 3rd electric capacity, the emitter of described the 4th triode is connected with the other end of described the 7th electric capacity by the 7th resistance, and the two ends of described the 3rd diode are also parallel with the second relay.
3. induction type fan safety device according to claim 1, it is characterized in that: the structure of described emitter-base bandgap grading emitter coupled logic circuit is: the first relay is connected the collector electrode of the 3rd triode with the one end after the second diodes in parallel, the emitter of described the 3rd triode is connected with the emitter of the second triode, described the first relay is connected with the collector electrode of described the second triode by the 5th resistance with the other end after the second diodes in parallel, the collector electrode of described the second triode is connected with the base stage of described the 3rd triode by the second resistance, the emitter of described the second triode is connected with the other end of the low voltage side of described transformer by the 3rd resistance, the base stage of described the 3rd triode is connected with the other end of the low voltage side of described transformer by the 4th resistance.
4. induction type fan safety device according to claim 1, it is characterized in that: the structure of described energy-dissipating brake circuit is: inductance, the second electric capacity and the two ends after the 3rd capacitances in series are connected respectively the output terminal of described emitter-base bandgap grading emitter coupled logic circuit, the two ends of described inductance are parallel with the first electric capacity, the two ends of described the second electric capacity connect respectively the collector and emitter of the first triode, the two ends of described the 3rd electric capacity are parallel with the 6th resistance, one end of described the 6th resistance is connected with the base stage of described the first triode by the 5th electric capacity, the two ends of described the 5th electric capacity are in parallel with the second resistance, the base stage of described the first triode connects successively the first resistance and is connected with the other end of inductance after slide rheostat, the emitter of described the first triode is connected to fan housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210311298.9A CN103629134A (en) | 2012-08-29 | 2012-08-29 | Inductive fan safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210311298.9A CN103629134A (en) | 2012-08-29 | 2012-08-29 | Inductive fan safety device |
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| Publication Number | Publication Date |
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| CN103629134A true CN103629134A (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210311298.9A Pending CN103629134A (en) | 2012-08-29 | 2012-08-29 | Inductive fan safety device |
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| CN (1) | CN103629134A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19938319A1 (en) * | 1999-08-12 | 2001-02-15 | Motoren Ventilatoren Gmbh | Method and circuit for controlling RPMs in an electric motor driving a ventilating fan in a gaseous hot spa has a power input for an electrical energy source and a signal input for a sensor to detect noise, vibration or its mechanical load. |
| JP2009013890A (en) * | 2007-07-05 | 2009-01-22 | Nec Commun Syst Ltd | Power source circuit for fan and control method |
| CN102052340A (en) * | 2009-10-28 | 2011-05-11 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN202326335U (en) * | 2011-11-18 | 2012-07-11 | 成都思茂科技有限公司 | Capacitance type inductive fan safety device |
| CN202867295U (en) * | 2012-08-29 | 2013-04-10 | 成都槟果科技有限公司 | Induction electric fan safety device |
-
2012
- 2012-08-29 CN CN201210311298.9A patent/CN103629134A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19938319A1 (en) * | 1999-08-12 | 2001-02-15 | Motoren Ventilatoren Gmbh | Method and circuit for controlling RPMs in an electric motor driving a ventilating fan in a gaseous hot spa has a power input for an electrical energy source and a signal input for a sensor to detect noise, vibration or its mechanical load. |
| JP2009013890A (en) * | 2007-07-05 | 2009-01-22 | Nec Commun Syst Ltd | Power source circuit for fan and control method |
| CN102052340A (en) * | 2009-10-28 | 2011-05-11 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN202326335U (en) * | 2011-11-18 | 2012-07-11 | 成都思茂科技有限公司 | Capacitance type inductive fan safety device |
| CN202867295U (en) * | 2012-08-29 | 2013-04-10 | 成都槟果科技有限公司 | Induction electric fan safety device |
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Application publication date: 20140312 |