Protect lighting drive circuits, power distribution equipment, and lighting systems

Abstract

This utility model relates to the field of power supply and distribution technology, specifically to a lighting drive circuit, power distribution equipment, and lighting system. The lighting drive circuit includes: a power switch, a contactor, a battery, and a lighting lamp; one end of the power switch is connected to a power line, and the other end is connected to the power supply terminal of the contactor. The first normally open contact of the contactor is located at the output terminal of the lighting lamp. The lighting lamp is connected to the power line and also to one end of the battery, the other end of which is connected to the power line. When the power switch is in the open state, the contactor disconnects the first normally open contact, cutting off the circuit between the lighting lamp and the power line. When the power line is de-energized, the battery generates an emergency power supply signal to drive the lighting lamp to illuminate. By setting up a contactor independently controlled by the power switch, the on / off state of the main circuit for general lighting is dynamically managed, and the charging line downstream of the lighting lamp is used to ensure that the lighting lamp automatically illuminates to provide backup lighting in the event of a non-active power outage.

Description

Technical Field

[0001] This utility model relates to the field of power supply and distribution technology, and in particular to a lighting drive circuit, power distribution equipment and lighting system. Background Technology

[0002] Lighting systems are electrical systems that ensure the safety and well-being of personnel. In recent years, the requirements for emergency lighting in guest rooms, apartments, and other similar settings have increased, and the application scenarios for emergency lighting have become increasingly widespread. Emergency lighting is generally powered by mains electricity and provides normal illumination for daily production and life, primarily to improve people's visual comfort. Emergency lighting, however, is a crucial safeguard in special scenarios. It typically only illuminates during fire emergencies or when the mains power fails. Its reliability directly affects personnel evacuation, emergency equipment operation, and the safety of life and property during sudden power outages.

[0003] Currently, standard emergency lighting systems typically use independent emergency lighting fixtures that are directly connected to the mains power supply for continuous charging. This requires an additional power supply circuit and is not controlled by a switch, increasing construction costs and wiring complexity, wasting energy, and reducing the reliability of batteries in emergency situations.

[0004] The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0005] The main purpose of this utility model is to provide a solution for lighting drive circuits, power distribution equipment and lighting systems, aiming to solve the technical problem that independent circuit lighting requires additional switching operations and has logical conflicts in the prior art.

[0006] In a first aspect, this utility model provides a lighting driving circuit, which includes: a power switch, a contactor, a storage battery, and a lighting lamp; One end of the power switch is connected to the power cord, and the other end of the power switch is connected to the power supply terminal of the contactor. The first normally open contact of the contactor is located at the output terminal of the lighting lamp. The lighting lamp is connected to the power cord and is also connected to one end of the battery. The other end of the battery is connected to the power cord. The contactor is used to disconnect the first normally open contact to cut off the circuit between the lighting lamp and the power line when the power switch is in the off state. The battery is used to generate an emergency power supply signal to drive the lighting lamp to light up when the power line is de-energized.

[0007] Optionally, when the power switch is in the closed state, the contactor closes the first normally open contact to conduct the circuit between the lighting lamp and the power line, and the power supply signal generated by the power line drives the lighting lamp to light up.

[0008] Optionally, the lighting drive circuit further includes: a lighting switch; The lighting switch is connected in series between the lighting lamp and the power cord; When the power switch is closed and the lighting switch is closed, the power supply signal generated by the power line drives the lighting lamp to light up.

[0009] Optionally, the battery is also used to charge based on the power supply signal generated by the power line when the power switch is closed and the power line is not disconnected.

[0010] Optionally, the battery is also used to charge based on the power supply signal generated by the power line when the power switch is in the off state and the power line is not disconnected.

[0011] Optionally, the lighting drive circuit further includes: a first circuit breaker and a second circuit breaker; The first circuit breaker is connected in series between the lighting fixture and the power line; The second circuit breaker is connected in series between the power supply switch and the power line.

[0012] Optionally, the lighting drive circuit further includes at least one power supply circuit; Each of the aforementioned power outgoing circuits is connected to the power line through the second normally open contact of the contactor; The contactor is also used to disconnect the second normally open contact to cut off the power supply between the power line and the power outgoing circuit when the power switch is in the off state.

[0013] Optionally, the lighting drive circuit may further include a third circuit breaker, the same number as the power outgoing circuits. The third circuit breaker is located at one end of each of the power outgoing circuits near the second normally open contact of the contactor.

[0014] Secondly, this utility model provides a power distribution device, which includes: the lighting drive circuit described above.

[0015] Thirdly, this utility model provides a lighting system, which includes the lighting system described above.

[0016] This utility model provides a lighting drive circuit, power distribution equipment, and lighting system. The lighting drive circuit includes a power switch, a contactor, a battery, and a lighting lamp. One end of the power switch is connected to a power line, and the other end is connected to the power supply terminal of the contactor. The first normally open contact of the contactor is located at the output terminal of the lighting lamp. The lighting lamp is connected to the power line and also to one end of the battery, with the other end of the battery connected to the power line. The contactor, when the power switch is in the off state, disconnects the first normally open contact, cutting off the circuit between the lighting lamp and the power line. The battery, when the power line is de-energized, generates an emergency power supply signal to drive the lighting lamp to illuminate. By setting a contactor independently controlled by the power switch, the on / off state of the main lighting circuit is dynamically managed, and the charging line downstream of the lighting lamp ensures that the lighting lamp automatically illuminates to provide backup lighting in the event of a non-active power outage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the lighting drive circuit of this utility model; Figure 2 This is a schematic diagram of the structure of the second embodiment of the lighting drive circuit of this utility model; Figure 3 This is a schematic diagram of the circuit breaker configuration in the second embodiment of the lighting drive circuit of this utility model; Figure 4 This is a schematic diagram of the structure of multiple outgoing lines in the second embodiment of the lighting drive circuit of this utility model.

[0019] Explanation of icon numbers: SW1, Power switch; SW2, Lighting switch; L1, Lighting lamp; L2, Ultraviolet lamp; KM, Contactor; BAT, Battery; BUS, Power cord; KT1, First circuit breaker; KT2, Second circuit breaker.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly. Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the lighting drive circuit of this utility model, based on Figure 1 A lighting drive circuit is proposed to ensure safety.

[0023] In this embodiment, the lighting drive circuit includes: a power switch SW1, a contactor KM, a battery BAT, and a lighting lamp L1; one end of the power switch SW1 is connected to the power line BUS, and the other end of the power switch SW1 is connected to the power supply terminal of the contactor KM. The first normally open contact (O1) of the contactor KM is located at the output terminal of the lighting lamp L1. The lighting lamp L1 is connected to the power line BUS, and the lighting lamp L1 is also connected to one end of the battery BAT. The other end of the battery BAT is connected to the power line BUS.

[0024] It should be noted that the contactor KM can be used to disconnect the first normally open contact and cut off the circuit between the lighting lamp L1 and the power line BUS when the power switch SW1 is in the off state; the battery BAT can be used to generate an emergency power supply signal to drive the lighting lamp L1 to light up when the power line BUS is de-energized.

[0025] It should be understood that a power switch can be an electrical switch with on / off function, capable of controlling the power supply status of an AC contactor coil. It typically operates manually (e.g., rotary, push-button, or lever type), controlling circuit conduction internally through the closing or opening of contacts. The rated current of the power switch must match the controlled AC contactor coil (usually a low-current specification, such as 1-5A) to ensure safe carrying of the coil's operating current. A contactor can be an AC contactor, capable of quickly cutting off the AC main circuit and frequently connecting and disconnecting the current control circuit. It is used to control motors as the controlled object, and can also be used to control power loads such as factory equipment, electric heaters, machine tools, and various power units. Contactors not only connect and disconnect circuits but also provide undervoltage release protection. Contactors have a large control capacity and are suitable for frequent operation and remote control. A contactor includes at least one normally open contact, and optionally, a normally closed contact. When the contactor receives a power supply signal from the power supply line at the power supply end (i.e., when the power switch is closed), it can control the normally open contact to close and the normally closed contact to open. When the contactor does not receive a power supply signal from the power supply line at the power supply end (i.e., when the power switch is off or the power line is de-energized), it can control the normally open contacts to open and the normally closed contacts to close.

[0026] Specifically, the contactor and power switch can be connected to the outgoing terminals of the uninterruptible power supply (UPS) circuit. The UPS circuit can be a dedicated power supply circuit independently led out from the inter-floor distribution box, unaffected by local power outages within the building, and always maintaining connection to the public power grid.

[0027] Understandably, the first normally open contact of the contactor is located at the output terminal of the lighting fixture, using a line taken from the downstream of the lighting fixture circuit to power the battery. The battery needs to have a power failure detection function. The battery itself can be a sealed lead-acid battery or a lithium-ion battery, selected according to capacity requirements, used to store electrical energy and provide emergency power for the lighting fixtures. The power failure detection function can be implemented by using a built-in voltage sensor and signal processing unit to monitor the voltage of the connected power line in real time and set a voltage threshold as the judgment basis. When the power switch is closed and the battery detects that the power line is not disconnected (the power line voltage is higher than the set voltage threshold), the battery charges based on the power supply signal generated by the power line. When the power switch is open and the battery detects that the power line is not disconnected (the power line voltage is higher than the set voltage threshold), it charges based on the power supply signal generated by the power line. Therefore, the battery can be charged regardless of whether the power switch is off, always maintaining enough power to supply lighting in an emergency.

[0028] Current standard emergency lighting systems use independent emergency lighting fixtures (including batteries and charging / discharging control circuits). These fixtures are typically directly connected to the mains power supply for continuous charging. When a mains power outage is detected (regardless of the cause), the control circuit automatically switches to battery power, illuminating the fixtures (usually a forced start, not controlled by a switch). Fire-specific emergency lighting must also meet fire safety regulations (such as duration, brightness, and location). Alternatively, a standby backup lighting circuit with an independent switch can be used. This involves setting up an independent backup lighting circuit within the room, powered by mains power. This circuit typically draws a power source directly from the distribution box (not controlled by the room's main switch, such as from the floor distribution box) to power the fixtures, and uses a separate wall switch to control their operation. Standard emergency lighting in the above scheme cannot be controlled by a regular switch. Alternatively, backup lighting based on human body induction / motion detection can be used, where backup lighting fixtures (usually with batteries) incorporate human infrared sensors (PIR) or millimeter-wave radar motion detectors. This solution combines mains power detection with sensor-controlled operation. When mains power is available, the lights automatically turn on when someone is detected and the ambient light is dim, and turn off when no one is present. However, when the mains power fails, the lights are forcibly turned on regardless of whether anyone is detected. This human body detection solution has low reliability and also suffers from the potential for false activation and high cost.

[0029] In practice, when the homeowner enters the room, they turn on the power switch to draw power. At this time, the contactor is energized, and its first normally open contact is closed. The lights function normally, and the battery is charged. The lights are powered by the power cord. When the homeowner leaves the room, they turn off the power switch, and the first normally open contact of the contactor is open. The power supply circuit between the power cord and the lights is broken, and the lights will not turn on. However, the battery remains connected to the power cord and is charging.

[0030] When a leakage current trips or a mains power outage occurs in the room, meaning the power supply line is de-energized, the contactor is de-energized, and the first normally open contact of the contactor is open. The power supply circuit between the power line and the lighting is broken, so the lighting will not turn on. At the same time, the battery is also de-energized and cannot continue to charge. At this time, the battery switches to a discharging state to turn on the lighting and ensure illumination.

[0031] In this embodiment, the emergency lighting drive circuit includes: a power switch, a contactor, a battery, and a lighting lamp; one end of the power switch is connected to a power line, and the other end of the power switch is connected to the power supply terminal of the contactor; the first normally open contact of the contactor is located at the output terminal of the lighting lamp; the lighting lamp is connected to the power line, and the lighting lamp is also connected to one end of the battery, the other end of the battery being connected to the power line; the contactor is used to disconnect the first normally open contact to cut off the circuit between the lighting lamp and the power line when the power switch is in the off state; the battery is used to generate an emergency power supply signal to drive the lighting lamp to light up when the power line is de-energized. By setting a contactor independently controlled by the power switch, the on / off state of the main circuit for ordinary lighting is dynamically managed, and the charging line downstream of the lighting lamp is used to ensure that the lighting lamp automatically lights up as backup lighting in the event of a non-active power outage.

[0032] Reference Figure 2 , Figure 2 This is a schematic diagram of the second embodiment of the lighting drive circuit of this utility model. Based on the first embodiment of the lighting drive circuit described above, a second embodiment of the lighting drive circuit of this utility model is proposed.

[0033] In this embodiment, the lighting drive circuit further includes a lighting switch SW2; the lighting switch SW2 is connected in series between the lighting lamp L1 and the power line BUS; when the power switch SW1 is closed and the lighting switch SW2 is closed, the power supply signal generated by the power line BUS drives the lighting lamp L1 to light up.

[0034] It should be noted that a lighting switch is a device that controls the opening and closing of contacts mechanically or electronically. It can manually or automatically disconnect or connect the circuit between the light fixture and the power supply. For example, a single-pole rocker switch can be used, installed on the wall, where pressing the panel drives the internal contacts to close or open. When the power switch is closed, the incoming terminal of the lighting switch is connected to the power line, and the outgoing terminal is connected to the light fixture. At this time, closing the lighting switch creates a complete circuit to light the lamp, and opening the lighting switch turns off the lamp.

[0035] It should be understood that since the battery is directly connected to the power line and does not go through the lighting switch, the battery will be charging regardless of whether the lighting switch is closed or open, as long as the power line is not disconnected. This solution uses the same components as the main lighting, allowing it to function as a regular light controlled by the lighting switch, and also to provide emergency lighting directly from the internal battery in the event of a power outage.

[0036] Reference Figure 3 , Figure 3This is a schematic diagram of the circuit breaker arrangement in the second embodiment of the lighting drive circuit of this utility model. The lighting drive circuit further includes: a first circuit breaker KT1 and a second circuit breaker KT2; the first circuit breaker KT1 is connected in series between the lighting lamp L1 and the power line BUS; the second circuit breaker KT2 is connected in series between the power switch SW1 and the power line BUS.

[0037] It should be noted that circuit breakers can provide overload and short-circuit protection for circuits. When the current in a circuit exceeds the rated value or a short circuit occurs, it can automatically disconnect the circuit to prevent equipment damage or electrical accidents. For example, a 16A miniature circuit breaker can be used to prevent safety problems caused by overload (such as too many lighting fixtures, increased resistance due to aging wiring, etc.) or short circuit (such as direct connection between the phase line and the neutral line due to damaged wiring insulation, etc.), thus ensuring the electrical safety of the system.

[0038] Furthermore, referring to Figure 4 , Figure 4 This is a schematic diagram of the structure of multiple outgoing lines in the second embodiment of the lighting drive circuit of this utility model. The lighting drive circuit may further include at least one power outgoing line circuit; each of the power outgoing line circuits is connected to the power line BUS through the second normally open contact (O2) of the contactor KM.

[0039] It should be noted that the contactor KM can also be used to disconnect the second normally open contact to cut off the power supply between the power line BUS and the power outgoing circuit when the power switch SW1 is in the open state.

[0040] It is understandable that the lighting drive circuit can also include various electrical devices (such as other types of lamps, appliances, etc.), and the power output circuit can connect the power line of the distribution box to the input terminal of each electrical device for power supply.

[0041] Furthermore, similar to the first circuit breaker KT1 and the second circuit breaker KT2 mentioned above, a third circuit breaker KT3 is installed at the end of each power outgoing circuit closest to the second normally open contact of the contactor. This is to prevent safety issues caused by overload or short circuit in each power outgoing circuit.

[0042] This embodiment ensures that the emergency lighting drive circuit also includes a lighting switch; the lighting switch is connected in series between the lighting lamp and the power line; when the power switch is closed and the lighting switch is also closed, the power supply signal generated by the power line drives the lighting lamp to light up. Under normal circumstances, the emergency lighting functions the same as ordinary lighting and is controlled by the ordinary lighting switch panel. This overcomes the disadvantage that standard emergency lighting cannot be controlled by daily switches. The emergency lighting will not be turned on when the owner is normally away from the house, ensuring its lifespan. In the event of a power outage, the emergency lighting will immediately turn on regardless of whether the main lighting is off. This solves the problem of requiring an additional switch operation for independent circuit emergency lighting, while avoiding the problems of low reliability, potential false activation, and high cost associated with human body induction solutions. This solution is implemented purely in hardware, offering advantages such as low cost, high reliability, fast response speed, and ease of implementation and maintenance.

[0043] In addition, intelligent controllers / microcontrollers can be used to collect signals such as the status of the power switch, the total incoming voltage, and the status of the general lighting switch, and use logic judgment to control and ensure lighting and battery charging and discharging. Alternatively, a combination of special-function relays / contactors can be used, for example, adding a relay specifically for detecting the "uninterruptible power supply" status, whose contact signal is input to the battery control module as one of the conditions for "whether discharge is allowed".

[0044] This utility model also discloses a power distribution device, which includes the aforementioned lighting protection drive circuit.

[0045] It should be noted that the power distribution equipment includes the inter-floor power supply boxes that transmit power from the municipal transmission lines to the owners' rooms, as well as the owners' power supply boxes. The lighting drive circuit can be located within the owners' power supply box. Power transmission between power supply boxes can be achieved via cables (such as WDZB-YJY-B1-3X6 type cables), and the power supply circuits within the lighting drive circuit are also transmitted via cables (such as WDZC-BJY type cables).

[0046] Since the lighting system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0047] This utility model also discloses a lighting system, which includes the aforementioned power distribution equipment.

[0048] It should be noted that, in addition to the power distribution equipment mentioned above, the lighting system may also include other supporting circuits, such as electronic components for personnel detection.

[0049] Since the lighting system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A lighting drive circuit, characterized in that, The lighting drive circuit includes: a power switch, a contactor, a battery, and a lighting lamp; One end of the power switch is connected to the power cord, and the other end of the power switch is connected to the power supply terminal of the contactor. The first normally open contact of the contactor is located at the output terminal of the lighting lamp. The lighting lamp is connected to the power cord and is also connected to one end of the battery. The other end of the battery is connected to the power cord. The contactor is used to disconnect the first normally open contact to cut off the circuit between the lighting lamp and the power line when the power switch is in the off state. The battery is used to generate an emergency power supply signal to drive the lighting lamp to light up when the power line is de-energized.

2. The lighting drive circuit as described in claim 1, characterized in that, When the power switch is closed, the contactor closes the first normally open contact to connect the circuit between the lighting lamp and the power line, and the power supply signal generated by the power line drives the lighting lamp to light up.

3. The lighting drive circuit as described in claim 2, characterized in that, The lighting drive circuit also includes: a lighting switch; The lighting switch is connected in series between the lighting lamp and the power cord; When the power switch is closed and the lighting switch is closed, the power supply signal generated by the power line drives the lighting lamp to light up.

4. The lighting drive circuit as described in claim 3, characterized in that, The battery is also used to charge based on the power supply signal generated by the power line when the power switch is closed and the power line is not disconnected.

5. The lighting drive circuit as described in claim 4, characterized in that, The battery is also used to charge based on the power supply signal generated by the power line when the power switch is in the off state and the power line is not disconnected.

6. The lighting drive circuit as described in claim 5, characterized in that, The lighting protection drive circuit also includes: a first circuit breaker and a second circuit breaker. The first circuit breaker is connected in series between the lighting fixture and the power line; The second circuit breaker is connected in series between the power supply switch and the power line.

7. The lighting drive circuit as described in claim 1, characterized in that, The lighting drive circuit also includes at least one power supply circuit. Each of the aforementioned power outgoing circuits is connected to the power line through the second normally open contact of the contactor; The contactor is also used to disconnect the second normally open contact to cut off the power supply between the power line and the power outgoing circuit when the power switch is in the off state.

8. The lighting drive circuit as described in claim 7, characterized in that, The lighting drive circuit also includes a third circuit breaker with the same number of power outgoing circuits. The third circuit breaker is located at one end of each of the power outgoing circuits near the second normally open contact of the contactor.

9. A power distribution device, characterized in that, The power distribution equipment includes the lighting drive circuit as described in any one of claims 1 to 8.

10. A lighting system, characterized in that, The lighting system includes the power distribution equipment as described in claim 9.

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