An emergency lighting device

Abstract

The utility model provides a kind of emergency lighting device, its power module is connected with commercial power through power switch, for providing power supply for other module;Detection module includes commercial power detection unit and power-off reason detection unit, and located in the rear end of power switch;Control module is connected with the commercial power voltage signal output end of commercial power detection unit, the power-off reason signal output end of power-off reason detection unit and the lighting control end of lighting module, can identify the power-off reason according to the output signal of detection module, avoid the problem that power switch is opened false trigger emergency lighting, and control lighting module to light when judging for commercial power outage.The utility model provides a kind of emergency lighting device, which can distinguish between power failure and power switch disconnection, can be set in the rear end of power switch, and can be connected in parallel in the original lighting equipment, without the need to transform indoor electrical wiring, easy to install, can effectively improve the emergency response capability in the room, improve safety.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to an emergency lighting device. Background Technology

[0002] The fundamental purpose of emergency lights is to provide crucial illumination in emergency situations where the main power supply fails (such as in the event of a fire, earthquake, or power outage caused by circuit failure).

[0003] Emergency lights are typically installed in environments with poor natural lighting, such as hallways, corridors, and basements, and automatically turn on during power outages. Emergency lights usually require independent wiring and a separate connection to the mains power. In residential buildings, for already renovated homes, the cost of cutting grooves and wiring specifically for emergency lights is high and inconvenient, resulting in most residential buildings lacking emergency lights and compromising safety. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide an emergency lighting device to solve the problem that emergency lights require independent wiring and are not easy to embed in existing wiring, resulting in most residential buildings having no emergency lights in their indoor areas and insufficient safety.

[0005] This utility model provides an emergency lighting device, comprising: a power supply module, a lighting module, a control module, and a detection module, wherein... The power module includes an energy storage battery and is connected to the mains power supply via a power switch to provide power to other modules. The detection module includes a mains power detection unit and a power failure cause detection unit. The mains power detection unit and the power failure cause detection unit are connected to the power supply circuit of the power module and are located at the rear end of the power switch. The control module is connected to the mains voltage signal output terminal of the mains power detection unit, the power failure reason signal output terminal of the power failure reason detection unit, and the lighting control terminal of the lighting module.

[0006] Optionally, the power failure cause detection unit includes an excitation circuit and a data acquisition circuit, wherein, The input terminal of the excitation circuit is connected to the first voltage signal output terminal of the power supply module, and the output terminal of the excitation circuit is connected to the first power supply line of the power supply module. The input terminal of the acquisition circuit is connected to the second power line of the power module, and a voltage acquisition node in the acquisition circuit is the output terminal of the power failure reason signal.

[0007] Optionally, it also includes a neutral wire abnormality detection circuit, wherein the second power line is a neutral wire, and the neutral wire abnormality detection circuit includes a first resistor, a first diode and a first switching transistor connected in series between the second voltage signal output terminal of the power module and ground, the control terminal of the first switching transistor is connected to a voltage acquisition node in the acquisition circuit, the anode of the first diode is connected to the neutral wire abnormality signal input terminal of the control module, and the control module is also connected to a neutral wire abnormality indicator.

[0008] Optionally, a first capacitor is connected in series on the first power line of the power module, and the output terminal of the excitation circuit is connected between the first capacitor and the power switch.

[0009] Optionally, the power module includes a rectifier circuit, a charging circuit, a boost circuit, and a linear regulator circuit, wherein, The input terminal of the rectifier circuit is connected to the mains power through the power switch, and the output terminal of the rectifier circuit is connected to the input terminal of the charging circuit. The input terminal of the boost circuit is connected to the output terminal of the energy storage battery, and the output terminal of the boost circuit is connected to the power supply terminal of the lighting module. The input terminal of the linear voltage regulator circuit is connected in parallel to the output terminal of the rectifier circuit and the output terminal of the boost circuit, and the output terminal of the linear voltage regulator circuit is connected to the power supply terminal of the control module.

[0010] Optionally, the charging circuit includes: a constant current charging unit, which is connected between the output terminal of the rectifier circuit and the energy storage battery. The control terminal of the constant current charging unit is also grounded through a third transistor, and the control terminal of the third transistor is connected to the charging control signal output terminal of the control module.

[0011] Optionally, the control terminal of the boost circuit is also connected to the boost switch control signal output terminal of the control module.

[0012] Optionally, the energy storage battery is connected to a first voltage acquisition unit and a second voltage acquisition unit. The output terminal of the first voltage acquisition unit is connected to the energy storage power monitoring signal input terminal of the control module, and the output terminal of the second voltage acquisition unit is connected to the gate drive signal input terminal of the control module.

[0013] Optionally, the control module is also connected to an ambient light sensor and a temperature sensor.

[0014] Optionally, the control module is also connected to a working status indicator light and a mode selection switch.

[0015] The emergency lighting device provided by this utility model includes: a power supply module, a lighting module, a control module, and a detection module. The power supply module includes a storage battery and is connected to the mains power supply via a power switch to provide power to other modules. The detection module includes a mains power detection unit and a power failure cause detection unit, which are connected to the power supply module's power circuit and located at the rear end of the power switch. The control module is connected to the mains voltage signal output terminal of the mains power detection unit, the power failure cause signal output terminal of the power failure cause detection unit, and the lighting control terminal of the lighting module. It can identify whether there is a power failure based on the mains voltage signal. After identifying a power failure, it determines whether the power failure is due to the power switch being actively disconnected or a mains power outage, thus avoiding the problem of the emergency lighting being accidentally triggered when the power switch is disconnected. When a mains power outage is determined, it controls the lighting module to illuminate. The emergency lighting device provided by this utility model can identify and distinguish between power outages and power switch disconnection. It can be installed at the rear end of the power switch and can be connected in parallel with the existing lighting equipment without modifying the indoor electrical wiring. This provides convenience for improving indoor emergency lighting and enhances the safety of emergency response in the home. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main module structure of the emergency lighting device in this embodiment of the utility model; Figure 2 This is a circuit diagram of the control module of the emergency lighting device in this embodiment of the present utility model; Figure 3 This is a partial circuit diagram of the power supply module of the emergency lighting device in this embodiment of the utility model; Figure 4 This is a partial circuit diagram of the detection module of the emergency lighting device in this embodiment of the utility model; Figure 5 This is a circuit diagram of the mains power detection unit of the emergency lighting device in this embodiment of the utility model; Figure 6 This is a circuit diagram of the boost circuit of the power module of the emergency lighting device in this embodiment of the present invention; Figure 7 This is a circuit diagram of the voltage regulator circuit of the power module of the emergency lighting device in this embodiment of the present invention; Figure 8 This is a circuit diagram of the lighting module of the emergency lighting device in this embodiment of the utility model.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] To address the issue that emergency lights require independent wiring, making them inconvenient to integrate into existing wiring, resulting in the lack of emergency lighting in most residential areas and insufficient safety, this invention provides an emergency lighting device. Its power module connects to the mains power supply via a power switch to provide power to other modules. The detection module includes a mains power detection unit and a power failure cause detection unit, located at the rear end of the power switch. The control module connects to the mains voltage signal output terminal of the mains power detection unit, the power failure cause signal output terminal of the power failure cause detection unit, and the lighting control terminal of the lighting module. It can identify the cause of power failure based on the output signal of the detection module, preventing accidental triggering of emergency lighting when the power switch is disconnected. It can be located at the rear end of the power switch and can be connected in parallel with existing lighting equipment without requiring modifications to indoor electrical wiring. Installation is convenient, effectively improving the emergency response capability of residences and enhancing safety.

[0022] Specifically, such as Figure 1As shown, the emergency lighting device in this embodiment is located at the rear end of the power switch, requiring no separate wiring and can be connected in parallel with existing electrical equipment. It includes a power module 20, a lighting module 40, a control module 10, and a detection module 30. The power module 20 includes an energy storage battery and is connected to the mains power supply via the power switch. It draws power from the mains power to provide power to other modules and to supply power to other modules via the energy storage battery during power outages. The detection module 30 includes a mains power detection unit and a power failure cause detection unit. The mains power detection unit and the power failure cause detection unit are connected to the power draw circuit of the power module 20 and are located at the rear end of the power switch 40. The control module 10 is connected to the mains voltage signal output terminal of the mains power detection unit, the power failure cause signal output terminal of the power failure cause detection unit, and the lighting control terminal of the lighting module.

[0023] In use, the control module 10 determines whether there is a power failure based on the mains voltage signal. It can compare the mains voltage with the reference voltage. When the mains voltage is greater than the reference voltage, it is determined that there is power. When the mains voltage is less than the reference voltage, it is determined that there is a power failure. The reference voltage data can be stored in the control module 10.

[0024] In the power failure cause detection, the control module 10 determines whether the mains power is cut off or the power switch is turned off based on the status of the power failure cause signal.

[0025] like Figure 2 As shown, the control module 10 is mainly implemented through the microcontroller U2, and data such as the reference voltage can be stored in the registers inside the microcontroller.

[0026] Please refer to further details. Figure 3 and Figure 4 The power module 20 includes a rectifier circuit 21, which converts AC mains power into a DC signal and outputs a first DC voltage VDD. The charging circuit 22 charges the energy storage battery BT1 based on the first DC voltage VDD. The rectifier circuit 21 includes a rectifier bridge BD1, and a third capacitor C3 and a Zener diode ZD1 are connected to the positive output terminal of the rectifier bridge BD1 to improve the stability of the first DC voltage VDD. The current direction between the rectifier circuit 21 and the charging circuit 22 is defined by a diode D1.

[0027] The power failure cause detection unit is connected to the input path of the rectifier circuit 21 and is located after the power switch S0. It includes an excitation circuit and a acquisition circuit. The input terminal of the excitation circuit is connected to the first voltage signal output terminal of the power module 20 (providing 10V DC power supply; in this embodiment, 10V is used as an example, but the actual value can be selected according to specific needs, and this application does not make a special limitation on its specific value). The output terminal of the excitation circuit is connected to the first power line of the power module 20. The input terminal of the acquisition circuit is connected to the second power line of the power module 20. A voltage acquisition node in the acquisition circuit is the power failure cause signal output terminal, and the power failure cause signal VIS-AD is provided to the control module 10.

[0028] When the control module 10 is powered on for the first time, the power switch S0 is in the off state. The excitation circuit injects a DC voltage signal into the first power line according to the 10V DC power supply. The control module 10 collects and records the first value of the power failure reason signal VIS-AD.

[0029] After the power switch S0 is closed and the emergency lighting device is connected to the mains power, the power switch S0 is actively disconnected, the system loses power, and the control module 10 collects and records the second value of the power failure cause signal VIS-AD. At this time, the second value is equal to the first value, and it can be determined that the power failure is caused by the power switch S0 being disconnected.

[0030] When the power switch S0 is closed and the mains power fails, the power line is still connected to the external load through the power switch S0. The DC voltage signal injected into the excitation circuit also acts on the external load. The current of the external load flows into the acquisition circuit, and the current of the acquisition circuit increases. At this time, the control module 10 acquires and records the third value of the power failure reason signal VIS-AD. If the third value is greater than the first value, it can be determined that the power failure reason is the mains power failure.

[0031] Among them, such as Figure 5 As shown, the mains power detection unit mainly detects the magnitude of the first DC voltage VDD, divides the first DC voltage VDD by a resistor, provides the mains voltage signal VIN-AD to the control module 10 for judgment, and stabilizes the mains voltage signal VIN-AD by a capacitor.

[0032] like Figure 4 As shown, in this embodiment, a diode D4 and a resistor R21 are connected in series from the input end to the output end of the excitation circuit to ensure the unidirectionality of the excitation circuit and prevent AC mains power from interfering with the power supply module 20 through the excitation circuit.

[0033] The acquisition circuit uses multiple resistors connected in series, with an intermediate node of the resistors serving as the voltage acquisition node to provide the power failure reason signal VIS-AD. The power failure reason signal VIS-AD is regulated by a capacitor.

[0034] To prevent the DC output of the excitation circuit from being short-circuited by the rectifier circuit 21 and to ensure that the excitation signal can effectively act on the acquisition circuit, in this embodiment, a first capacitor C1 is connected in series on the first input path of the rectifier circuit 21. The output terminal of the excitation circuit is connected between the first capacitor C1 and the power switch S0. Specifically, the output terminal of the excitation circuit is connected to node L1, which is located between the fuse F1 and the first capacitor C1. The fuse F1 is located between the power switch S0 and the first capacitor C1. The first capacitor C1 can prevent the excitation signal from acting on the third capacitor C3 through the rectifier bridge BD1, thus avoiding interference with the detection of the mains power.

[0035] The acquisition circuit of this utility model is also used for neutral wire detection, and also includes a neutral wire abnormality detection circuit. To facilitate the arrangement of the neutral wire abnormality detection circuit, in this embodiment, the second power line is the neutral wire N. The neutral wire abnormality detection circuit and the acquisition circuit share a voltage divider resistor. The neutral wire abnormality detection circuit includes a first resistor R18, a first diode D6, and a first switch Q5 connected in series between the second voltage signal output terminal (providing 3.3V DC power supply) of the power module and ground. The control terminal of the first switch Q5 is connected to a voltage acquisition node in the acquisition circuit. The anode of the first diode D6 is connected to the neutral wire abnormality signal input terminal of the control module 10 to provide a neutral wire abnormality signal AC-DET. The control module 10 is also connected to a neutral wire abnormality indicator.

[0036] When the neutral wire grounding is abnormal, the neutral wire becomes energized, which can drive the first switching transistor Q5 to conduct. The voltage of the neutral wire abnormality signal AC-DET is pulled down from 3.3V to ground. The control module 10 identifies the neutral wire abnormality based on the neutral wire abnormality signal AC-DET and can remind the user of insufficient electrical safety through the neutral wire abnormality indicator, so that the user can deal with it in time and avoid electrical safety accidents caused by the neutral wire abnormality. The neutral wire abnormality indicator may include, for example, an LED indicator light or a buzzer. The LED indicator light can be driven by the microcontroller U2 of the control module 10, which is easy to implement.

[0037] To meet the system's power requirements, in this embodiment, please refer to... Figure 3 , Figure 6 , Figure 7 and Figure 8 In this embodiment, the power module 20 also includes a boost circuit and a linear regulator circuit. The input terminal of the boost circuit is connected to the output terminal BAT+ of the energy storage battery BT1, and the output terminal of the boost circuit is connected to the power supply terminal of the lighting module 40. The boost chip U3 converts the output voltage of the energy storage battery BT1 into 10V DC power supply, which is used as the driving voltage of the lighting module 40 and the driving voltage of the excitation circuit.

[0038] like Figure 7As shown, the input terminal of the linear voltage regulator circuit 24 is connected to the output terminal of the rectifier circuit 21 and the output terminal of the boost circuit 23 respectively through two diodes, and they are connected in parallel. The linear voltage regulator chip U1 converts the voltage to obtain a 3.3V regulated output. The output terminal of the linear voltage regulator circuit 24 is connected to the working power supply terminal of the control module 10 to provide a 3.3V regulated power supply for the microcontroller U2, ensuring the reliability of the microcontroller U2.

[0039] When mains power is connected, the linear voltage regulator circuit 24 operates based on the first DC voltage VDD. To avoid wasting power on the energy storage battery BT1, the control module 10 also controls the boost circuit 23 to stop. Specifically, the microcontroller U2 provides a boost switch control signal ON / OFF to control the operation of the boost chip U3, thereby controlling whether the boost circuit 23 is enabled. When the first DC voltage VDD returns to zero, the control module 10 determines that power has been lost and simultaneously enables the boost circuit 23. When mains power fails, the boost switch control signal ON / OFF can be pulled up by the output voltage of the energy storage battery BT1, triggering the enable terminal EN of the boost chip U3, controlling the boost chip U3 to automatically power on. When mains power is available, the microcontroller U2 provides a boost switch control signal ON / OFF to change the enable state of the boost chip U3, turning off the boost circuit 23 and avoiding wasting power on the energy storage battery BT1.

[0040] To ensure charging efficiency, such as Figure 3 As shown, the charging circuit 22 includes a constant current charging unit, which is connected between the output of the rectifier circuit 21 and the energy storage battery BT1. The constant current charging unit mainly consists of transistors Q1 and Q6 and corresponding resistors. The control terminal of the constant current charging unit (the base of transistor Q1) is also grounded through a third transistor Q3. The control terminal of the third transistor Q3 is connected to the charging control signal output terminal of the control module. According to the charging control signal CH-EN, when the energy storage battery BT1 is fully charged, the third transistor Q3 is turned on by the charging control signal CH-EN, thereby pulling down the base of transistor Q1 to ground and turning off the constant current charging unit.

[0041] To facilitate power monitoring of the energy storage battery BT1, the energy storage battery BT1 is also connected to a first voltage acquisition unit. The first voltage acquisition unit acquires the voltage of the energy storage battery BT1 through a voltage divider resistor and a voltage stabilizing capacitor, and provides the energy storage battery voltage signal VBAD output.

[0042] like Figure 8As shown, the switching of the lighting module 40 is controlled by the switching transistor Q2. The driving voltage of the driving signal LED-EN of the switching transistor Q2 is required to be high. In order to drive the switching transistor Q2, the energy storage battery BT1 is also connected to a second voltage acquisition unit. The second voltage acquisition unit obtains the driving voltage signal Vcom from the energy storage battery BT1 through a voltage divider resistor and a voltage regulator capacitor. The output terminal of the driving voltage signal is connected to the gate driving signal input terminal of the control module 10.

[0043] The control module 10 also monitors the operating current of the lighting module 40, collects the lighting drive current signal Ise, and monitors the operating status of the lighting module 40 based on the lighting drive current signal Ise.

[0044] The lighting drive current signal Ise and the drive voltage signal Vcom are also connected to the microcontroller U2 through an RC filter circuit.

[0045] In this embodiment, as Figure 2 As shown, the control module 10 is also connected to an ambient light sensor (including a photoresistor R26) and a temperature sensor (including temperature resistors RT1 and RT2) to monitor ambient light intensity and ambient temperature. When the ambient light intensity is sufficient, even if the mains power fails, the lighting module 40 will not be controlled to light up. When the temperature is abnormal, the lighting module 40 will be automatically controlled to light up regardless of the cause of the power failure.

[0046] The control module 10 is also connected to a working status indicator LED11 and a mode selection switch S1 to determine whether the control module 10 is working properly. The mode selection switch S1 has three states, corresponding to automatic mode (Auto), constant light mode (COMMON), and off mode (OFF). The constant light mode can be used to replace the main lighting when it is damaged; the off mode can be used during transportation to prevent it from turning on automatically and wasting the energy storage battery; the automatic mode (Auto) automatically controls whether the lighting module is lit based on environmental factors, power failure, etc.

[0047] The emergency lighting device provided by this utility model can identify and distinguish between power outages and power switch disconnection. It can be installed at the rear end of the power switch and can be connected in parallel with the existing lighting equipment without modifying the indoor electrical wiring. This provides convenience for improving indoor emergency lighting and enhances the safety of emergency response in the home.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. An emergency lighting device, characterized in that, include: The module includes a power supply module, a lighting module, a control module, and a detection module. The power module includes an energy storage battery and is connected to the mains power supply via a power switch to provide power to other modules. The detection module includes a mains power detection unit and a power failure cause detection unit. The mains power detection unit and the power failure cause detection unit are connected to the power supply circuit of the power module and are located at the rear end of the power switch. The control module is connected to the mains voltage signal output terminal of the mains power detection unit, the power failure reason signal output terminal of the power failure reason detection unit, and the lighting control terminal of the lighting module.

2. The emergency lighting device according to claim 1, characterized in that, The power failure cause detection unit includes an excitation circuit and a data acquisition circuit, wherein... The input terminal of the excitation circuit is connected to the first voltage signal output terminal of the power supply module, and the output terminal of the excitation circuit is connected to the first power supply line of the power supply module. The input terminal of the acquisition circuit is connected to the second power line of the power module, and a voltage acquisition node in the acquisition circuit is the output terminal of the power failure reason signal.

3. The emergency lighting device according to claim 2, characterized in that, It also includes a neutral wire abnormality detection circuit, wherein the second power line is the neutral wire, and the neutral wire abnormality detection circuit includes a first resistor, a first diode and a first switching transistor connected in series between the second voltage signal output terminal of the power module and ground. The control terminal of the first switching transistor is connected to a voltage acquisition node in the acquisition circuit, and the anode of the first diode is connected to the neutral wire abnormality signal input terminal of the control module. The control module is also connected to a neutral wire abnormality indicator.

4. The emergency lighting device according to claim 2, characterized in that, A first capacitor is connected in series on the first power line of the power module, and the output terminal of the excitation circuit is connected between the first capacitor and the power switch.

5. The emergency lighting device according to claim 1, characterized in that, The power module includes a rectifier circuit, a charging circuit, a boost circuit, and a linear regulator circuit, wherein... The input terminal of the rectifier circuit is connected to the mains power through the power switch, and the output terminal of the rectifier circuit is connected to the input terminal of the charging circuit. The input terminal of the boost circuit is connected to the output terminal of the energy storage battery, and the output terminal of the boost circuit is connected to the power supply terminal of the lighting module. The input terminal of the linear voltage regulator circuit is connected in parallel to the output terminal of the rectifier circuit and the output terminal of the boost circuit, and the output terminal of the linear voltage regulator circuit is connected to the power supply terminal of the control module.

6. The emergency lighting device according to claim 5, characterized in that, The charging circuit includes a constant current charging unit, which is connected between the output terminal of the rectifier circuit and the energy storage battery. The control terminal of the constant current charging unit is also grounded through a third transistor, and the control terminal of the third transistor is connected to the charging control signal output terminal of the control module.

7. The emergency lighting device according to claim 5, characterized in that, The control terminal of the boost circuit is also connected to the boost switch control signal output terminal of the control module.

8. The emergency lighting device according to claim 1, characterized in that, The energy storage battery is connected to a first voltage acquisition unit and a second voltage acquisition unit. The output terminal of the first voltage acquisition unit is connected to the energy storage power monitoring signal input terminal of the control module, and the output terminal of the second voltage acquisition unit is connected to the gate drive signal input terminal of the control module.

9. The emergency lighting device according to claim 1, characterized in that, The control module is also connected to an ambient light sensor and a temperature sensor.

10. The emergency lighting device according to claim 1, characterized in that, The control module is also connected to a working status indicator light and a mode selection switch.

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