CN202334990U - Light-emitting diode (LED) emergency light control circuit adopting normally-closed contact to control charging - Google Patents
Light-emitting diode (LED) emergency light control circuit adopting normally-closed contact to control charging Download PDFInfo
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- CN202334990U CN202334990U CN2011203677171U CN201120367717U CN202334990U CN 202334990 U CN202334990 U CN 202334990U CN 2011203677171 U CN2011203677171 U CN 2011203677171U CN 201120367717 U CN201120367717 U CN 201120367717U CN 202334990 U CN202334990 U CN 202334990U
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Abstract
The utility model relates to a light-emitting diode (LED) emergency light control circuit adopting a normally-closed contact to control charging. The LED emergency light control circuit comprises a commercial power input part, a commercial power detection part, a capacitor step-down rectification charging part, a switch, a constant-voltage circuit, an eight-pin time-base integrated circuit (NE555), an optical coupler circuit, an LED lamp and a storage battery, and is characterized in that: the normally-closed contact of an alternating current relay, the storage battery and the LED lamp form a loop for detecting a commercial power signal; the commercial power is subjected to capacitor step-down rectification, and then forms a charging loop together with the normally-closed contact of the alternating current relay and the storage battery; and the NE555 controls the opening and closing of the normally-closed contact of the alternating current relay by controlling the gating of an optical coupler, so that if only the commercial power exists, the storage battery can be charged by the commercial power, and can be prevented from being damaged. The LED emergency light control circuit adopting the normally-closed contact to control charging is particularly suitable for pilot lights of building fire control, caution lights and family emergency lights.
Description
Technical field
The utility model relates to a kind of LED emergency light control circuit that adopts normally-closed contact control charging, is specially adapted to avigation light, warning lamp and family's emergency light of building fire-fighting.
Background technology
Existing LED emergency lighting circuit, charging circuit all are to adopt relay normally open contact to control, and when a certain reason (long like the external power interruption duration), the voltage drop of storage battery is low to moderate below the actuating of relay value, often can't work.Storage battery can't charge, and will cause the permanent damages of storage battery like this, has a strong impact on performance of products.
Summary of the invention
In view of above-mentioned technical deficiency, the purpose of the utility model provides a kind of LED emergency light control circuit that adopts normally-closed contact control charging.This circuit adopts the light AC relay to detect city's signal of telecommunication.The LED lamp did not work when realization had civil power, and in the time of no civil power, the LED lamp is bright.The charging circuit of storage battery is by capacitance decompression, and rectifier bridge and relay normally-closed contact constitute, and guarantees can both charge a battery when civil power is arranged as long as battery tension is low, has overcome disadvantages of background technology.
The utility model adopts following scheme to realize: a kind of LED emergency light control circuit that adopts normally-closed contact control charging comprises the civil power input, city's electro-detection; The capacitance decompression rectification charging, switch, voltage stabilizing circuit; 8 pin time-base integrated circuit (NE555) and photoelectric coupled circuit, LED lamp, storage battery; It is characterized in that: adopt the normally closed interlock and the storage battery of AC relay, the LED lamp constitutes the loop and detects city's signal of telecommunication, and civil power constitutes charge circuit with direct current relay normally closed interlock, storage battery after the capacitance decompression rectification; The gating of 8 pin time-base integrated circuits (NE555) control optocoupler is controlled opening of direct current relay normally closed interlock and disconnected; As long as realize that civil power is arranged, civil power can charge a battery, and avoids the damage of storage battery.
In a preferred embodiment, the relay of electro-detection is selected AC relay for use in the city.
In a preferred embodiment, storage battery links to each other with the optocoupler input through the normally open contact of AC relay.
In a preferred embodiment, storage battery is selected the 12v lead acid accumulator.
The utility model detects and control method, novelty, and implementation is specifically practical, can be widely used in building fire-fighting avigation light, warning lamp and family's emergency light.
Description of drawings
Fig. 1 is the utility model circuit theory sketch map.
Fig. 2 is the utility model circuit embodiments circuit diagram.
Embodiment
As shown in Figure 1, the purpose of the utility model provides a kind of LED emergency light control circuit that adopts normally-closed contact control charging, comprises the civil power input; City's electro-detection, capacitance decompression rectification charging, switch; Voltage stabilizing circuit, NE555 and photoelectric coupled circuit, LED lamp; Storage battery is characterized in that: adopt the normally closed interlock and the storage battery of AC relay, the LED lamp constitutes the loop and detects city's signal of telecommunication; Civil power after the capacitance decompression rectification with direct current relay relay normally closed interlock, storage battery constitutes charge circuit, the gating of NE555 control optocoupler is controlled opening of direct current relay normally closed interlock and disconnected; As long as realize that civil power is arranged, civil power can charge a battery, and avoids the damage of storage battery.
Fig. 2 is the specific embodiment circuit diagram, is having under the situation of civil power, and AC relay has detected city's signal of telecommunication, and this moment, relay K 0 was logical, and the normally closed contact K0 that closes of relay K 0 breaks off, and emergency light LED does not work.Do not having under the situation of civil power, AC relay detects does not have city's signal of telecommunication, relay K 0 outage this moment, and the normally closed contact K0 closure of closing of relay K 0, emergency light LED does not work.
Having under the situation of civil power, civil power begins to charge a battery.External circuit connects the output of storage battery, after divider resistance R3, R4, R5 dividing potential drop, and in the branch pressure voltage value of sampled point A and B input terminal voltage value as the 6th pin and the 2nd pin of NE555, because
，
When the terminal voltage of storage battery was 14.5V, the output voltage values that A, B are 2 was respectively:
Output voltage values by 2 of A, B can be known:
This time NE555 the 3rd pin output be low level, optocoupler U3 conducting, relay K 1 coil gets electric, the normally closed interlock of relay K 1 breaks off, major loop does not drop into civil power.So can know, when storage battery voltage greater than 14.5V the time, major loop does not drop into civil power,, promptly civil power does not charge a battery.
When the terminal voltage of storage battery was 10.7V, the output voltage values that A, B are 2 was respectively:
Output voltage values by 2 of A, B can be known:
This time NE555 the 3rd pin output be high level, not conducting of optocoupler U3, relay K 1 coil blackout, the normally closed interlock of relay K 1 is closed, major loop drops into civil power, promptly civil power charges a battery.So can know, when the storage battery voltage was lower than 10.7V, major loop dropped into civil power.Like this when a certain reason (long) like the external power interruption duration; The voltage of storage battery seriously reduces; The voltage of storage battery do not reach relay operating value voltage, relay can not move, normally closed interlock is closed; External power just can charge a battery, and overcomes this problem of battery damage.
Can know that when accumulator voltage was higher than 10.7V and is lower than 14.5V, this time, the output voltage values by 2 of A, B can obtain:
When the voltage of storage battery is when dropping to 10.7V from 14.5V, the output of the 3rd pin of NE555 be low level, optocoupler U3 conducting; Relay K 1 coil gets; The normally closed interlock of relay K 1 breaks off, and major loop does not drop into civil power, and promptly civil power does not charge a battery.
When the voltage of storage battery is when rising to 14.5V from 10.7V, the output of the 3rd pin of NE555 be high level, not conducting of optocoupler U3, relay K 1 coil blackout, the normally closed interlock of relay K 1 is closed, major loop drops into civil power, promptly civil power charges a battery.
The above is merely the preferred embodiment of the utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model.
Claims (4)
1. a LED emergency light control circuit that adopts normally-closed contact control charging comprises the civil power input, city's electro-detection; The capacitance decompression rectification charging, switch, voltage stabilizing circuit; 8 pin time-base integrated circuit and photoelectric coupled circuit; The LED lamp, storage battery is characterized in that: adopt the normally closed interlock of AC relay and storage battery, LED lamp formation loop to detect city's signal of telecommunication; Civil power constitutes charge circuit with direct current relay normally closed interlock, storage battery after the capacitance decompression rectification, the gating of 8 pin time-base integrated circuits control optocoupler is controlled opening of direct current relay normally closed interlock and disconnected.
2. a kind of LED emergency light control circuit that adopts normally-closed contact control charging according to claim 1 is characterized in that the relay of the electro-detection in the city is selected AC relay for use.
3. a kind of LED emergency light control circuit that adopts normally-closed contact control charging according to claim 1 is characterized in that the normally open contact that storage battery passes through AC relay links to each other with the optocoupler input.
4. a kind of LED emergency light control circuit that adopts normally-closed contact control charging according to claim 1 is characterized in that storage battery selection 12v lead acid accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203677171U CN202334990U (en) | 2011-09-29 | 2011-09-29 | Light-emitting diode (LED) emergency light control circuit adopting normally-closed contact to control charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203677171U CN202334990U (en) | 2011-09-29 | 2011-09-29 | Light-emitting diode (LED) emergency light control circuit adopting normally-closed contact to control charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334990U true CN202334990U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203677171U Expired - Fee Related CN202334990U (en) | 2011-09-29 | 2011-09-29 | Light-emitting diode (LED) emergency light control circuit adopting normally-closed contact to control charging |
Country Status (1)
| Country | Link |
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| CN (1) | CN202334990U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825327A (en) * | 2014-02-25 | 2014-05-28 | 天津市畅和科技有限公司 | Trigger pulse output circuit for charger |
| CN110167237A (en) * | 2019-06-26 | 2019-08-23 | 广东南一华电气有限公司 | A kind of emergency lightening control circuit |
-
2011
- 2011-09-29 CN CN2011203677171U patent/CN202334990U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825327A (en) * | 2014-02-25 | 2014-05-28 | 天津市畅和科技有限公司 | Trigger pulse output circuit for charger |
| CN103825327B (en) * | 2014-02-25 | 2015-12-16 | 天津市畅和科技有限公司 | A kind of trigger impulse output circuit for charger |
| CN110167237A (en) * | 2019-06-26 | 2019-08-23 | 广东南一华电气有限公司 | A kind of emergency lightening control circuit |
| CN110167237B (en) * | 2019-06-26 | 2024-04-16 | 广东南一华电气有限公司 | Emergency lighting control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20140929 |
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| EXPY | Termination of patent right or utility model |