CN213028665U - Emergency power supply switching control circuit and emergency lighting equipment - Google Patents
Emergency power supply switching control circuit and emergency lighting equipment Download PDFInfo
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- CN213028665U CN213028665U CN202022305280.0U CN202022305280U CN213028665U CN 213028665 U CN213028665 U CN 213028665U CN 202022305280 U CN202022305280 U CN 202022305280U CN 213028665 U CN213028665 U CN 213028665U
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Abstract
The utility model relates to an emergency power supply technical field. The utility model discloses an emergency power supply switches control circuit and emergency lighting equipment, wherein, emergency power supply switches control circuit includes switching circuit, detection circuitry and drive circuit, switching circuit is used for switching input power and charges or rechargeable battery supplies power for emergency load, detection circuitry is used for detecting the power supply condition of input power and gives drive circuit with detected signal transmission, drive circuit switches according to detected signal corresponding drive switching circuit, detection circuitry adopts bleeder circuit to realize, switching circuit adopts the relay to realize. The utility model discloses but fast switch to emergency state when the input power outage, input power can be switched to for battery charge state by emergency state fast when going up again, and circuit structure is simple, only need a small amount of conventional discrete device can, need not specific chip, with low costs, occupation space is little.
Description
Technical Field
The utility model belongs to the technical field of emergency power supply, specifically relate to an emergency power supply switches control circuit and emergency lighting equipment.
Background
Lighting that is enabled by a failure of the power supply for normal lighting (primarily mains) is referred to as emergency lighting. Emergency lighting is an important safety facility for modern public buildings and industrial buildings, is generally installed in places such as corridors, warehouses, tunnels and the like, and is closely related to personal safety and building safety. When a fire or other disasters happen to a building and the power supply is interrupted, emergency lighting plays an important role in evacuation of personnel, fire rescue work, important production, continuous operation of work or necessary operation and disposal.
Traditional emergency lighting's power switching circuit's circuit structure is more complicated, and circuit assembly is troublesome, and the cost is higher, and need use relevant chip when detecting the power signal of input, and the cost is higher, and competitive advantage is not enough on the market.
Disclosure of Invention
An object of the utility model is to provide an emergency power supply switching control circuit and emergency lighting equipment are used for solving the technical problem that the above-mentioned exists.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides an emergency power supply switches control circuit, includes switching circuit, detection circuitry and drive circuit, and switching circuit is used for switching input power supply and charges or rechargeable battery supplies power for emergency load, and detection circuitry is used for detecting the power supply condition of input power supply and gives drive circuit with detected signal transmission, and drive circuit switches according to detected signal corresponding drive switching circuit, and detection circuitry adopts bleeder circuit to realize, and switching circuit adopts the relay to realize.
Further, the detection circuit comprises a diode D5, a capacitor C6, a resistor R20 and a resistor R21, the positive end of the diode D5 is connected with an input power supply, the negative end of the diode D5 is sequentially connected with a resistor R20 and a resistor R21 in series and is grounded, the capacitor C6 is connected with a resistor R20 and a resistor R21 which are connected in series in parallel, and a node between the resistor R20 and the resistor R21 serves as the output end of the detection circuit and is connected with the input end of the driving circuit.
Further, the driving circuit is realized by adopting an NPN triode, the NPN triode is connected in series in a coil power supply loop of the relay, and a base electrode of the NPN triode is connected with an output end of the detection circuit.
Furthermore, the driving circuit further comprises a current limiting resistor R22, and the current limiting resistor R22 is connected in series with the NPN transistor.
Further, the switching circuit is realized by a single-pole double-throw relay.
Furthermore, the test circuit is used for shielding the detection signal output to the drive circuit.
Furthermore, the test circuit is composed of a key switch.
The utility model also discloses an emergency lighting equipment, this emergency lighting equipment is equipped with foretell emergency power supply switching control circuit.
The utility model has the advantages of:
the utility model discloses but fast switch to emergency state when the input power outage, input power can be switched to for battery charging state by emergency state fast when going up again, and circuit structure is simple, only need a small amount of conventional discrete device can, need not relevant chip, easily realize, with low costs, occupation space is little, has improved market competition advantage.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of the emergency power switching control circuit of the present invention;
fig. 2 is a circuit diagram of an emergency power switching control circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of another circuit according to an embodiment of the present invention.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, an emergency power switching control circuit includes a switching circuit 1, a detection circuit 4 and a driving circuit 3, where the switching circuit 1 is used to switch an input power 5 to charge a rechargeable battery 2 or the rechargeable battery 2 supplies power to an emergency load 6, the detection circuit 4 is used to detect the power supply condition of the input power 5 and transmit a detection signal to the driving circuit 3, the driving circuit 3 correspondingly drives the switching circuit 1 to switch according to the detection signal, the detection circuit 4 is implemented by using a voltage division circuit, and the switching circuit 1 is implemented by using a relay.
In this embodiment, the input power source 5 is a commercial power source, but is not limited thereto, and in some embodiments, may be another common power source.
As shown in fig. 2, in the present embodiment, the detection circuit 4 includes a diode D5, a capacitor C6, a resistor R20 and a resistor R21, a positive terminal of the diode D5 is connected to the input power source 5, specifically, in the present embodiment, a positive terminal of the diode D5 is connected to an output positive terminal Vs of a power circuit, and an input terminal of the power circuit is connected to the input power source 5.
The negative end of the diode D5 is connected in series with a resistor R20 and a resistor R21 in sequence and grounded AGND, a capacitor C6 is connected in parallel with the resistor R20 and the resistor R21 which are connected in series, and the node between the resistor R20 and the resistor R21 is the output end of the detection circuit 4 and is connected with the input end of the drive circuit 3.
In this embodiment, the power circuit is a constant voltage circuit, and the specific circuit structure please refer to fig. 3, which is not detailed, but not limited thereto, and in other embodiments, the power circuit may be implemented by other existing power circuits.
By adopting the detection circuit 4, the circuit structure is simple, the implementation is easy, the cost is low, and the driving effect is good, but not limited to this, in some embodiments, the detection circuit 4 can also be implemented by adopting other existing voltage division circuits.
In this embodiment, the switching circuit 1 is implemented by using the single-pole double-throw relay K1, and has a simple structure, easy implementation, low cost, and high reliability, and certainly, in some embodiments, the switching circuit 1 may also be implemented by using other relays, such as a double-pole double-throw relay.
The common contact of the relay K1 is connected to the positive electrode JBAT of the rechargeable battery BT, and the normally closed contact BOOST of the relay K1 is connected to the emergency load 6, in this embodiment, the normally closed contact BOOST of the relay K1 is connected to the emergency load 6 through a discharge circuit, and the emergency load 6 is an emergency lamp, but is not limited thereto.
In this embodiment, the discharging circuit is a BOOST voltage BOOST circuit, and the specific circuit structure please refer to fig. 3, which is not to be described in detail, but is not limited thereto.
The normally open contact BAT + of the relay K1 is connected with the output end of a charging circuit, and the input end of the charging circuit is connected with the output end of the constant voltage circuit. Referring to fig. 3, a detailed circuit structure of the charging circuit is not described in detail, but the charging circuit is not limited thereto, and in other embodiments, the charging circuit may be implemented by other existing charging circuits.
In this embodiment, the driving circuit 3 is implemented by using an NPN transistor Q2, a coil of a collector series relay K1 of the NPN transistor Q2 is connected to the other output terminal VOUT of the constant voltage circuit, a base of the NPN transistor Q2 is connected to a node between the resistor R20 and the resistor R21, and an emitter of the NPN transistor Q2 is grounded AGND.
Further, in this embodiment, the driving circuit 3 further includes a current-limiting resistor R22, and the current-limiting resistor R22 is connected in series with the NPN transistor Q2, so as to protect the coils of the NPN transistor Q2 and the relay K1, and improve safety and reliability.
In the embodiment, the relay further comprises a freewheeling diode D6, and the freewheeling diode D6 is arranged in parallel with the coil of the relay K1.
Further, in the present embodiment, the test circuit 7 is further included, and the test circuit 7 is configured to mask the detection signal output to the driving circuit 3.
Specifically, in this embodiment, the test circuit 7 is composed of a key switch S1, the first terminal of the key switch S1 is connected to the base of the NPN triode Q2, the second terminal of the key switch S1 is grounded AGND, and the key switch S1 is pressed to be closed and then opened when released.
The working process is as follows:
when the commercial power (input power 5) normally works, after the commercial power is converted by the constant voltage circuit, the output positive terminal Vs outputs a forward voltage, the capacitor C6 is charged by the diode D5, the voltage of the resistor R21 slowly rises at this time, when the voltage reaches a certain value, the NPN triode Q2 is turned on, the coil of the relay K1 is turned on, the switch of the relay K1 is turned on, the commercial power charges the rechargeable battery BT through the charging circuit via the switch of the relay K1, and the rechargeable battery BT is disconnected from the discharging circuit.
When the commercial power is cut off, the voltage on the positive output end Vs is changed into 0V, the capacitor C6 discharges through the resistors R20 and R21, the NPN triode Q2 is cut off along with the reduction of the voltage of the capacitor C6, the coil of the relay K1 is disconnected, the switch of the relay K1 is opened, the rechargeable battery BT supplies power to the discharge circuit through the relay K1 to supply power to the emergency lamp, and meanwhile the rechargeable battery BT is disconnected with the charging circuit.
When the key switch S1 is pressed, the key switch S1 is closed and conducted, the voltage on the resistor R21 is reduced to 0V, the emergency lamp works in a power-off state at the moment, if the emergency lamp is normally lighted, the circuit works normally, and if the emergency lamp is not lighted, the emergency circuit works abnormally or the battery is damaged, maintenance is needed.
The utility model also discloses an emergency lighting equipment, this emergency lighting equipment is equipped with foretell emergency power supply switching control circuit.
The utility model discloses but fast switch to emergency state when the input power outage, input power can be switched to for battery charging state by emergency state fast when going up again, and circuit structure is simple, only need a small amount of conventional discrete device can, need not specific chip, easily realize, with low costs, occupation space is little, has improved market competition advantage.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides an emergency power supply switches control circuit which characterized in that: the emergency load detection circuit comprises a switching circuit, a detection circuit and a driving circuit, wherein the switching circuit is used for switching an input power supply to charge a rechargeable battery or the rechargeable battery supplies power to an emergency load, the detection circuit is used for detecting the power supply condition of the input power supply and transmitting a detection signal to the driving circuit, the driving circuit correspondingly drives the switching circuit to switch according to the detection signal, the detection circuit is realized by adopting a voltage division circuit, and the switching circuit is realized by adopting a relay.
2. The emergency power switching control circuit of claim 1, wherein: the detection circuit comprises a diode D5, a capacitor C6, a resistor R20 and a resistor R21, wherein the positive end of the diode D5 is connected with an input power supply, the negative end of the diode D5 is sequentially connected with a resistor R20 and a resistor R21 in series and is grounded, the capacitor C6 is connected with a resistor R20 and a resistor R21 which are connected in series in parallel, and a node between the resistor R20 and the resistor R21 is the output end of the detection circuit and is connected with the input end of the driving circuit.
3. The emergency power switching control circuit of claim 1, wherein: the driving circuit is realized by adopting an NPN triode, the NPN triode is connected in series in a coil power supply loop of the relay, and the base electrode of the NPN triode is connected with the output end of the detection circuit.
4. The emergency power switching control circuit of claim 3, wherein: the driving circuit further comprises a current limiting resistor R22, and the current limiting resistor R22 is connected with the NPN triode in series.
5. The emergency power switching control circuit of claim 1, wherein: the switching circuit is realized by a single-pole double-throw relay.
6. The emergency power switching control circuit of claim 1, wherein: the test circuit is used for shielding the detection signal output to the drive circuit.
7. The emergency power switching control circuit of claim 6, wherein: the test circuit is composed of a key switch.
8. An emergency lighting device, characterized by: the emergency lighting device is provided with the emergency power switching control circuit of any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022305280.0U CN213028665U (en) | 2020-10-16 | 2020-10-16 | Emergency power supply switching control circuit and emergency lighting equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022305280.0U CN213028665U (en) | 2020-10-16 | 2020-10-16 | Emergency power supply switching control circuit and emergency lighting equipment |
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| CN213028665U true CN213028665U (en) | 2021-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117996694A (en) * | 2024-04-07 | 2024-05-07 | 广东高斯宝电气技术有限公司 | Relay switching protection circuit for digital power supply and charging control method thereof |
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2020
- 2020-10-16 CN CN202022305280.0U patent/CN213028665U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117996694A (en) * | 2024-04-07 | 2024-05-07 | 广东高斯宝电气技术有限公司 | Relay switching protection circuit for digital power supply and charging control method thereof |
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