CN212784882U - Power supply switching circuit for emergency lighting lamp - Google Patents
Power supply switching circuit for emergency lighting lamp Download PDFInfo
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- CN212784882U CN212784882U CN202021653868.9U CN202021653868U CN212784882U CN 212784882 U CN212784882 U CN 212784882U CN 202021653868 U CN202021653868 U CN 202021653868U CN 212784882 U CN212784882 U CN 212784882U
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Abstract
The utility model discloses a power supply switching circuit for emergency lighting lamp, include: transformer, rectifier unit, one-level voltage stabilization unit, voltage detection unit, power switching unit, battery and second grade voltage stabilization unit, the primary coil and the commercial power electric connection of transformer, the secondary coil of transformer with rectifier unit's input electric connection, rectifier unit's positive output with one-level voltage stabilization unit's input electric connection, one-level voltage stabilization unit's output respectively with voltage detection unit, power switching unit electric connection, power switching unit still respectively with battery, second grade voltage stabilization unit's input electric connection, second grade voltage stabilization unit output and load electric connection. The utility model realizes automatic starting emergency lighting in power failure through the cooperation of the triode and the relay, the whole circuit is simplified, and the cost is lower; can realize the illumination of manual opening light through the button, it is more convenient to use.
Description
Technical Field
The utility model relates to an emergency lighting lamp technical field especially relates to a power supply switching circuit for emergency lighting lamp.
Background
When the emergency lighting lamp is used, the storage battery inside the emergency lighting lamp needs to be switched to supply power when the mains supply is powered off, so that the LED lamp beads can continuously illuminate for a period of time under the power supply of the storage battery. At present, most of power supply switching circuits on the market are relatively complex, and many power supply switching circuits are realized by controlling ICs (integrated circuits), so that the cost is high.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a power supply switching circuit for emergency lighting lamp.
The technical scheme of the utility model as follows: the utility model provides a power supply switching circuit for emergency lighting lamp, include: the power supply comprises a transformer, a rectifying unit, a primary voltage stabilizing unit, a voltage detecting unit, a power supply switching unit, a battery and a secondary voltage stabilizing unit, wherein a primary coil of the transformer is electrically connected with a mains supply, a secondary coil of the transformer is electrically connected with an input end of the rectifying unit, a positive output end of the rectifying unit is electrically connected with an input end of the primary voltage stabilizing unit, an output end of the primary voltage stabilizing unit is respectively electrically connected with the voltage detecting unit and the power supply switching unit, the power supply switching unit is also respectively electrically connected with the battery and an input end of the secondary voltage stabilizing unit, and an output end of the secondary voltage stabilizing unit is electrically connected with a load;
the primary voltage stabilization unit includes: the capacitor comprises a first voltage stabilizing chip, a first capacitor and a second capacitor, wherein the model of the first voltage stabilizing chip is LM 7815; the voltage detection unit includes: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a triode and a diode, wherein the triode is a PNP type triode; the power supply switching unit comprises a button and a relay; the secondary voltage stabilization unit includes: the capacitor comprises a second voltage stabilizing chip, a third capacitor, a fourth capacitor, a fifth resistor and a sixth resistor, wherein the model of the second voltage stabilizing chip is LM 317; the input end of the first voltage stabilizing chip is respectively electrically connected with one end of a first capacitor and the positive output end of a rectifying unit, the output end of the first voltage stabilizing chip is respectively electrically connected with one end of a second capacitor, one end of a button and one end of a first resistor, the other end of the first capacitor, the grounding end of the first voltage stabilizing chip and the other end of the second capacitor are all grounded, the other end of the first resistor is respectively electrically connected with one end of a second resistor and one end of a third resistor, the other end of the second resistor is grounded, the other end of the third resistor is respectively electrically connected with one end of a fourth resistor and the base of a triode, the other end of the fourth resistor, the emitting electrode of the triode and one end of a switch of a relay are respectively electrically connected with the positive electrode of a battery, and the collector electrode of the triode is respectively electrically connected with the negative electrode of a diode and the positive electrode of the battery, One end electric connection of the coil of relay, the positive pole of diode, the other end of relay coil, the negative pole of battery all ground connection, the other end of relay switch respectively with the other end of button, the input of second voltage stabilizing chip, the one end electric connection of third electric capacity, the output of second voltage stabilizing chip respectively with the one end of fifth resistance, the one end of fourth electric capacity, load end electric connection, the voltage regulation end of second voltage stabilizing chip respectively with the other end of fifth resistance, the one end electric connection of sixth resistance, the other end ground connection of sixth resistance.
Further, the third capacitor and the fourth capacitor are both polar capacitors.
Further, the output voltage of the primary voltage stabilizing unit is 15V.
Further, the output voltage of the secondary voltage stabilizing unit is 6V.
By adopting the scheme, the utility model realizes automatic starting of emergency lighting in power failure through the cooperation of the triode and the relay, the whole circuit is simplified, and the cost is lower; can realize the illumination of manual opening light through the button, it is more convenient to use.
Drawings
Fig. 1 is a connection block diagram of the present invention.
Fig. 2 is a circuit diagram of the first-level voltage stabilizing unit, the voltage detecting unit, the power switching unit and the second-level voltage stabilizing unit of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and fig. 2, in this embodiment, the present invention provides an automatic power supply switching circuit for an emergency lighting lamp, including: transformer 1, rectifier unit 2, one-level voltage stabilizing unit 3, voltage detection unit 4, power switching unit 5, battery 6 and second grade voltage stabilizing unit 7, the voltage of battery 6 is 12V, transformer 1's primary coil and commercial power electric connection, transformer 1's secondary coil with rectifier unit 2's input electric connection, rectifier unit 2's positive output with one-level voltage stabilizing unit 3's input electric connection, one-level voltage stabilizing unit 3's output respectively with voltage detection unit 4, power switching unit 5 electric connection, power switching unit 5 still respectively with battery 6, second grade voltage stabilizing unit 7's input electric connection, second grade voltage stabilizing unit 7 output and load electric connection.
The primary voltage stabilization unit 3 includes: the circuit comprises a first voltage stabilizing chip U1, a first capacitor C1 and a second capacitor C2, wherein the model of the first voltage stabilizing chip U1 is LM7815, and the output voltage of the first voltage stabilizing chip U1 is 15V; the voltage detection unit 4 includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a triode Q1 and a diode D1, wherein the triode Q1 is a PNP type triode Q1; the power switching unit 5 includes a button and a relay K1; the secondary voltage stabilization unit 7 includes: the circuit comprises a second voltage stabilizing chip U2, a third capacitor C3, a fourth capacitor C4, a fifth resistor R5 and a sixth resistor R6, wherein the third capacitor C3 and the fourth capacitor C4 are polar capacitors, the model of the second voltage stabilizing chip U2 is LM317, and the output voltage of the second voltage stabilizing chip U2 is 6V; an input end of the first voltage stabilizing chip U1 is electrically connected to one end of a first capacitor C1 and a positive output end of the rectifying unit 2, an output end of the first voltage stabilizing chip U1 is electrically connected to one end of a second capacitor C2, one end of a button, and one end of a first resistor R1 (note that, in other embodiments of the present disclosure, a diode for preventing reverse connection may be disposed at an end of the button close to the first voltage stabilizing chip U1), the other end of the first capacitor C1, a ground end of the first voltage stabilizing chip U1, and the other end of the second capacitor C2 are all grounded, the other end of the first resistor R1 is electrically connected to one end of the second resistor R2 and one end of a third resistor R3, the other end of the second resistor R2 is grounded, the other end of the third resistor R3 is electrically connected to one end of the fourth resistor R4 and a base of a triode Q1, the other end of the fourth resistor R4, the emitter of the triode Q1 and one end of the switch of the relay K1 are all electrically connected with the anode of the battery 6, the collector of the triode Q1 is respectively and electrically connected with the cathode of the diode D1 and one end of the coil of the relay K1, the anode of the diode D1, the other end of the coil of the relay K1 and the cathode of the battery 6 are all grounded, the other end of the relay K1 switch is respectively and electrically connected with the other end of the button, the input end of the second voltage-stabilizing chip U2 and one end of the third capacitor C3, the output end of the second voltage regulation chip U2 is respectively and electrically connected with one end of the fifth resistor R5, one end of the fourth capacitor C4 and the load end, the voltage regulation end of the second voltage regulation chip U2 is electrically connected to the other end of the fifth resistor R5 and one end of the sixth resistor R6, respectively, and the other end of the sixth resistor R6 is grounded.
It is noted that the transformer and the rectifying unit of the present solution can be implemented by using the prior art which can implement the object of the present solution. Other embodiments of this scheme also can add switch circuit between one-level voltage stabilizing unit and second grade voltage stabilizing unit, for example increase the switch circuit who links to each other with fire extinguishing system, realize that switch circuit is closed when fire control alarm makes emergency lighting lamp realize the illumination.
Please continue to refer to fig. 1 to fig. 2 in combination, in the operation of the present invention, the commercial power is converted into voltage by the transformer 1, and then the rectifier unit 2 is converted into direct current, and 15V voltage is output by the primary voltage stabilizer unit 3, and the output voltage can be used for supplying power to the lighting lamp, and also can be charged to the battery 6 through the charging circuit. The voltage detection circuit is used for detecting whether commercial power exists, the power supply switching unit 5 is used for switching power supplies, and the secondary voltage stabilization unit 7 is used for stabilizing voltage and supplying power supplies to lamp beads of the illuminating lamp. When commercial power exists, the button can be pressed, so that the power supply of the primary voltage stabilizing unit 3 is supplied to the lamp bead of the illuminating lamp through the secondary voltage stabilizing unit 7 for use, and the illuminating lamp is lightened. The utility model discloses the during operation, triode Q1's base passes through voltage is gathered to second resistance R2, when commercial power had a power failure, the voltage of triode Q1's base becomes the low level, makes triode Q1 switches on, relay K1's coil circular telegram, relay K1's switch is closed, diode D1 can prevent relay K1's coil both ends produce big back electromotive force, battery 6's power passes through relay K1's switch provides second grade steady voltage unit 7, and then provides the lamp pearl of light and make the light lighten.
In summary, the utility model realizes automatic starting of emergency lighting in power failure through the cooperation of the triode and the relay, the whole circuit is simplified, and the cost is lower; can realize the illumination of manual opening light through the button, it is more convenient to use.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A power switching circuit for an emergency lighting lamp, comprising: the power supply comprises a transformer, a rectifying unit, a primary voltage stabilizing unit, a voltage detecting unit, a power supply switching unit, a battery and a secondary voltage stabilizing unit, wherein a primary coil of the transformer is electrically connected with a mains supply, a secondary coil of the transformer is electrically connected with an input end of the rectifying unit, a positive output end of the rectifying unit is electrically connected with an input end of the primary voltage stabilizing unit, an output end of the primary voltage stabilizing unit is respectively electrically connected with the voltage detecting unit and the power supply switching unit, the power supply switching unit is also respectively electrically connected with the battery and an input end of the secondary voltage stabilizing unit, and an output end of the secondary voltage stabilizing unit is electrically connected with a load;
the primary voltage stabilization unit includes: the capacitor comprises a first voltage stabilizing chip, a first capacitor and a second capacitor, wherein the model of the first voltage stabilizing chip is LM 7815; the voltage detection unit includes: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a triode and a diode, wherein the triode is a PNP type triode; the power supply switching unit comprises a button and a relay; the secondary voltage stabilization unit includes: the capacitor comprises a second voltage stabilizing chip, a third capacitor, a fourth capacitor, a fifth resistor and a sixth resistor, wherein the model of the second voltage stabilizing chip is LM 317; the input end of the first voltage stabilizing chip is respectively electrically connected with one end of a first capacitor and the positive output end of a rectifying unit, the output end of the first voltage stabilizing chip is respectively electrically connected with one end of a second capacitor, one end of a button and one end of a first resistor, the other end of the first capacitor, the grounding end of the first voltage stabilizing chip and the other end of the second capacitor are all grounded, the other end of the first resistor is respectively electrically connected with one end of a second resistor and one end of a third resistor, the other end of the second resistor is grounded, the other end of the third resistor is respectively electrically connected with one end of a fourth resistor and the base electrode of a triode, the other end of the fourth resistor, the emitting electrode of the triode and one end of a switch of a relay are respectively electrically connected with the positive electrode of a battery, and the collector electrode of the triode is respectively electrically connected with the negative electrode of a diode and the positive electrode of the, One end electric connection of the coil of relay, the positive pole of diode, the other end of relay coil, the negative pole of battery all ground connection, the other end of relay switch respectively with the other end of button, the input of second voltage stabilizing chip, the one end electric connection of third electric capacity, the output of second voltage stabilizing chip respectively with the one end of fifth resistance, the one end of fourth electric capacity, load end electric connection, the voltage regulation end of second voltage stabilizing chip respectively with the other end of fifth resistance, the one end electric connection of sixth resistance, the other end ground connection of sixth resistance.
2. The power switching circuit for emergency lighting lamps according to claim 1, comprising: and the third capacitor and the fourth capacitor are both polar capacitors.
3. The power supply switching circuit for emergency lighting lamp according to claim 1, wherein the output voltage of the primary voltage stabilizing unit is 15V.
4. The power supply switching circuit for emergency lighting lamp according to claim 1, wherein the output voltage of the secondary voltage stabilizing unit is 6V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021653868.9U CN212784882U (en) | 2020-08-10 | 2020-08-10 | Power supply switching circuit for emergency lighting lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021653868.9U CN212784882U (en) | 2020-08-10 | 2020-08-10 | Power supply switching circuit for emergency lighting lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212784882U true CN212784882U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021653868.9U Active CN212784882U (en) | 2020-08-10 | 2020-08-10 | Power supply switching circuit for emergency lighting lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212784882U (en) |
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2020
- 2020-08-10 CN CN202021653868.9U patent/CN212784882U/en active Active
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