CN202326335U - Capacitance type inductive fan safety device - Google Patents
Capacitance type inductive fan safety device Download PDFInfo
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- CN202326335U CN202326335U CN 201120460070 CN201120460070U CN202326335U CN 202326335 U CN202326335 U CN 202326335U CN 201120460070 CN201120460070 CN 201120460070 CN 201120460070 U CN201120460070 U CN 201120460070U CN 202326335 U CN202326335 U CN 202326335U
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Abstract
The utility model discloses a capacitance type inductive fan safety device. The safety device is connected with a power supply through a transformer and comprises an oscillation circuit, an emitter coupling trigger circuit and an energy consumption braking circuit, wherein a power input end of the oscillation circuit is connected with an output end of the transformer; the output end of the oscillation circuit is connected with the input end of the emitter coupling trigger circuit; the output end of the emitter coupling trigger circuit is connected with the input end of the energy consumption braking circuit; and the output end of the energy consumption braking circuit is connected with a fan cover. When a distance between human body and the fan cover is 1cm, the power supply is cut off and a motor is forced to stop running immediately, so that excellent protecting effect is achieved.
Description
Technical field
The utility model relates to a kind of electric fan safty device, more relates to the higher capacitive induction electric fan safty device of a kind of sensitivity and safety factor.
Background technique
Common domestic electric fan all has protective housing, but the child who has is from naughty, likes going to bump rotating blades with finger; This just causes danger easily; And the present electric fan safty device that adopt, 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
The purpose of the utility model with regard to be to provide in order to address the above problem a kind of when staff reach from electric fan protective housing 1cm local time, electric fan will be braked the capacitive induction electric fan safty device of stall.
The utility model is realized above-mentioned purpose through following technological scheme:
The utility model is connected with power supply through 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 said transformer; The output terminal of said oscillating circuit is connected with the input end of said emitter-base bandgap grading emitter coupled logic circuit; The output terminal of said emitter-coupled circuit is connected with the input end of said energy-dissipating brake circuit, and the output terminal of said energy-dissipating brake circuit connects fan housing.
The structure of said oscillating circuit is: an end of the low voltage side of said transformer connects an end of the 5th diode; The other end of said the 5th diode is connected with the other end of the low voltage side of said transformer through the 7th electric capacity; One end of said the 7th electric capacity is connected with the collector electrode of the 4th triode through behind the 3rd electric capacity; The emitter of said the 4th triode is connected with the other end of said the 7th electric capacity through the 7th resistance, and the two ends of said the 3rd diode also are parallel with second relay.
The structure of said emitter-base bandgap grading emitter coupled logic circuit is: the end after first relay and the second diode parallel connection is connected the collector electrode of the 3rd triode; The emitter of said the 3rd triode is connected with the emitter of second triode; The other end after said first relay and the second diode parallel connection is connected through the collector electrode of the 5th resistance with said second triode; The collector electrode of said second triode is connected with the base stage of said the 3rd triode through second resistance; The emitter of said second triode is connected with the other end of the low voltage side of said transformer through the 3rd resistance, and the base stage of said the 3rd triode is connected with the other end of the low voltage side of said transformer through the 4th resistance.
The structure of said energy-dissipating brake circuit is: the two ends after inductance, second electric capacity and the 3rd capacitances in series are connected the output terminal of said emitter-base bandgap grading emitter coupled logic circuit respectively; The two ends of said inductance are parallel with first electric capacity; The two ends of said second electric capacity connect the collector and emitter of first triode respectively; The two ends of said the 3rd electric capacity are parallel with the 6th resistance; One end of said the 6th resistance is connected with the base stage of said first triode through the 5th electric capacity; The two ends of said the 5th electric capacity are parallelly connected with second resistance, and the base stage of said first triode is connected with the other end of inductance after connecting first resistance and slide rheostat successively, and the emitter of said first triode is connected to fan housing.
The beneficial effect of the utility model is:
The utility model can be cut off the electricity supply when human body is near fan housing 1cm, and forces motor stall immediately, has played extraordinary safety effect.
Description of drawings
Fig. 1 is the structural principle block diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in Figure 1: the utility model is connected with power supply through transformer B, 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 said transformer; The output terminal of said oscillating circuit is connected with the input end of said emitter-base bandgap grading emitter coupled logic circuit; The output terminal of said emitter-coupled circuit is connected with the input end of said energy-dissipating brake circuit, and the output terminal of said energy-dissipating brake circuit connects fan housing.
As shown in Figure 2: the structure of said oscillating circuit is: an end of the low voltage side of transformer B connects the 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 through the 7th capacitor C 7; One end of the 7th capacitor C 7 is connected with the collector electrode of the 4th triode BG4 through the 3rd capacitor C 3 backs; The emitter of the 4th triode BG4 is connected with the other end of the 7th capacitor C 7 through the 7th resistance R 7, and the two ends of the 3rd diode D3 also are parallel with second relay J 2.
As shown in Figure 2: the structure of said emitter-base bandgap grading emitter coupled logic circuit is: the end after first relay J 1 and the second diode D2 parallel connection is connected the collector electrode of the 3rd triode BG3; The emitter of the 3rd triode BG3 is connected with the emitter of the second triode BG2; The other end after first relay J 1 and the second diode BG2 parallel connection is connected with the collector electrode of the second triode BG2 through the 5th resistance R 5; The collector electrode of the second triode BG2 is connected with the base stage of the 3rd triode BG3 through 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 through the 3rd resistance R 3, and the base stage of the 3rd triode BG3 is connected with the other end of the low voltage side of transformer B through the 4th resistance R 4.
As shown in Figure 2: the structure of said energy-dissipating brake circuit is: the two ends after inductance L, second capacitor C 2 and 3 series connection of the 3rd capacitor C are connected the output terminal of said emitter-base bandgap grading emitter coupled logic circuit respectively; The two ends of inductance L are parallel with first capacitor C 1; The two ends of second capacitor C 2 connect the collector and emitter of the first triode BG1 respectively; The two ends of said 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 through the 5th capacitor C 5; The two ends of the 5th capacitor C 5 are parallelly connected with second resistance R 2, and the base stage of the first triode BG1 is connected with the other end of inductance L after connecting first resistance R 1 and slide rheostat W successively, and the emitter of the first triode BG1 is connected to fan housing.
In conjunction with Fig. 1 and Fig. 2, after the energized, the fan motor energising, electric fan is started working.After the alternating voltage process PT power transformer B step-down of 220V, the 5th diode D5 rectification, the 7th electric capacity D7 filtering, supply with each transistor and make work voltage.At this moment the oscillator work formed such as the first triode BG1, the signal of output is added to the base stage of the second triode BG2 after through the first diode D1 rectification on the 6th resistance R 6.The emitter-base bandgap grading emitter coupled logic circuit that the second triode BG2, the 3rd triode BG3 etc. form.When oscillator signal was imported, the second triode BG2 became saturated, and the 3rd triode BG3 limit is a cut-off state, and relay J 1 is not inhaled.This moment, the 4th triode BG4 did not work the motor normal rotation because of the upper offset circuit breaks off.
When hand during apart from fan cover 1cm, because the existence of human body distributed capacity is equivalent to add in the earthquake loop individual electric capacity, normal resonant condition is destroyed, and circuit is failure of oscillation immediately, and the VDC of the negative pole of D1 output is at this moment reduced near 0V by 7V.End so the second triode BG2 is become by 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, and power supply gives the 4th capacitor C 4 chargings, and this charging current makes the BG4 conducting; 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 the motor; Owing to be direct current; Make stator produce a D.C. magnetic field, make rotor no longer rotate, so electric fan stall immediately.The charging current of the 4th capacitor C 4 equals zero after one second kind, the 4th triode BG4 by, second relay J 2 discharges; Braking process finishes, if staff does not leave electric fan, the first still adhesive of relay J 1; Second relay J 2 discharges, the electric fan stall is in one's hands always leave till.
As shown in Figure 2: as after circuit is adjusted, 1., 2. lighting outlet to be connect the plug of fan power; 3., 4. connect the 220V civil power; 5. be connected on the retaining screw of electric fan safety cover.
Claims (4)
1. capacitive induction electric fan safty device are connected with power supply through 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 said transformer; The output terminal of said oscillating circuit is connected with the input end of said emitter-base bandgap grading emitter coupled logic circuit; The output terminal of said emitter-coupled circuit is connected with the input end of said energy-dissipating brake circuit, and the output terminal of said energy-dissipating brake circuit connects fan housing.
2. according to the said capacitive induction electric fan of claim 1 safty device; It is characterized in that: the structure of said oscillating circuit is: an end of the low voltage side of said transformer connects an end of the 5th diode; The other end of said the 5th diode is connected with the other end of the low voltage side of said transformer through the 7th electric capacity; One end of said the 7th electric capacity is connected with the collector electrode of the 4th triode through behind the 3rd electric capacity; The emitter of said the 4th triode is connected with the other end of said the 7th electric capacity through the 7th resistance, and the two ends of said the 3rd diode also are parallel with second relay.
3. according to the said capacitive induction electric fan of claim 1 safty device; It is characterized in that: the structure of said emitter-base bandgap grading emitter coupled logic circuit is: the end after first relay and the second diode parallel connection is connected the collector electrode of the 3rd triode; The emitter of said the 3rd triode is connected with the emitter of second triode; The other end after said first relay and the second diode parallel connection is connected through the collector electrode of the 5th resistance with said second triode; The collector electrode of said second triode is connected with the base stage of said the 3rd triode through second resistance; The emitter of said second triode is connected with the other end of the low voltage side of said transformer through the 3rd resistance, and the base stage of said the 3rd triode is connected with the other end of the low voltage side of said transformer through the 4th resistance.
4. according to the said capacitive induction electric fan of claim 1 safty device; It is characterized in that: the structure of said energy-dissipating brake circuit is: the two ends after inductance, second electric capacity and the 3rd capacitances in series are connected the output terminal of said emitter-base bandgap grading emitter coupled logic circuit respectively; The two ends of said inductance are parallel with first electric capacity; The two ends of said second electric capacity connect the collector and emitter of first triode respectively; The two ends of said the 3rd electric capacity are parallel with the 6th resistance, and an end of said the 6th resistance is connected with the base stage of said first triode through the 5th electric capacity, and the two ends of said the 5th electric capacity are parallelly connected with second resistance; The base stage of said first triode is connected with the other end of inductance after connecting first resistance and slide rheostat successively, and the emitter of said first triode is connected to fan housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120460070 CN202326335U (en) | 2011-11-18 | 2011-11-18 | Capacitance type inductive fan safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120460070 CN202326335U (en) | 2011-11-18 | 2011-11-18 | Capacitance type inductive fan safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202326335U true CN202326335U (en) | 2012-07-11 |
Family
ID=46438317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120460070 Expired - Fee Related CN202326335U (en) | 2011-11-18 | 2011-11-18 | Capacitance type inductive fan safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202326335U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629134A (en) * | 2012-08-29 | 2014-03-12 | 成都槟果科技有限公司 | Inductive fan safety device |
| CN108988294A (en) * | 2018-07-04 | 2018-12-11 | 广州市康超信息科技有限公司 | A kind of fan touches protection circuit |
-
2011
- 2011-11-18 CN CN 201120460070 patent/CN202326335U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629134A (en) * | 2012-08-29 | 2014-03-12 | 成都槟果科技有限公司 | Inductive fan safety device |
| CN108988294A (en) * | 2018-07-04 | 2018-12-11 | 广州市康超信息科技有限公司 | A kind of fan touches protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121118 |