Emergency lighting circuit and control method thereof, emergency lighting system

Abstract

The present application relates to an emergency lighting circuit and its control method, and an emergency lighting system. The emergency lighting is monitored by detecting whether the charging management device in the emergency lighting circuit has power input. When there is no power input to the charging management device, the emergency lighting will be started, and the power transmitted to the load lighting device will be switched to the emergency battery device through the power switching device. After being processed by the boost inverter device, suitable power is provided to the load lighting device. The power detection device detects the input power signal of the boost inverter device, and adjusts the power of the load lighting device through the input power signal. The operating power of the load lighting device is adjusted by the input power signal of the boost inverter device. The input voltage of the boost inverter device is a DC low voltage, which is easy to detect. In addition, the scheme does not need to isolate high voltage voltage and current for power detection, which effectively reduces the detection cost and has strong power detection reliability.

Description

Technical Field

[0001] The present application relates to the field of lighting technology, and in particular to an emergency lighting circuit and a control method thereof, and an emergency lighting system. Background Art

[0002] Emergency lighting is the lighting that is activated when the power supply of normal lighting fails. Emergency lighting is an important safety facility in modern public buildings and industrial buildings. It is closely related to personal safety and building safety. When a fire or other disaster occurs in a building and the power supply is interrupted, emergency lighting plays an important role in personnel evacuation, fire rescue work, and the continued operation of important production and work or necessary operations.

[0003] There are many solutions for emergency lighting at present. When starting emergency lighting, most of them detect the voltage and current at the output of the boost inverter module, and then adjust the power so that the emergency lighting equipment can operate at the required power. However, in actual operation, the output of the boost inverter module is an unsafe high voltage, which is not easy to detect. The traditional emergency lighting system has the disadvantage of poor reliability of power detection. Summary of the invention

[0004] Based on this, it is necessary to provide an emergency lighting circuit and a control method thereof, and an emergency lighting system to address the problem of poor power detection reliability of traditional emergency lighting systems.

[0005] A control method for an emergency lighting circuit comprises: detecting in real time whether a charging management device of the emergency lighting circuit has electric energy input; when the charging management device has no electric energy input, controlling a power supply switching device of the emergency lighting circuit to switch to powering a load lighting device through an emergency battery device of the emergency lighting circuit; obtaining an input-end power signal of a boost inverter device of the emergency lighting circuit, and performing power regulation on the load lighting device according to the input-end power signal; the input-end power signal is detected and sent by a power detection device of the emergency lighting circuit, the charging management device and the power supply switching device are connected to an external power supply, the charging management device is connected to the emergency battery device, the emergency battery device is connected to the input end of the boost inverter device and the power detection device, the output end of the boost inverter device is connected to the power supply switching device, and the power supply switching device is connected to the load lighting device.

[0006] In one embodiment, after the step of detecting in real time whether the charging management device of the emergency lighting circuit has power input, it also includes: when the charging management device has power input, controlling the power supply switching device of the emergency lighting circuit to switch to power the load lighting equipment through an external power supply.

[0007] In one embodiment, when the charging management device has electric energy input, it also includes: receiving an external dimming signal input by a user, and adjusting the power of the load lighting device according to the external dimming signal.

[0008] In one embodiment, the step of obtaining the input-end power signal of the boost inverter device of the emergency lighting circuit includes: collecting the input-end voltage signal and the input-end current signal of the boost inverter device of the emergency lighting circuit in real time; and obtaining the input-end power signal according to the input-end voltage signal and the input-end current signal.

[0009] In one embodiment, when there is no power input to the charging management device, after the step of controlling the power supply switching device of the emergency lighting circuit to switch to power the load lighting equipment through the emergency battery device of the emergency lighting circuit, before the step of obtaining the input end power signal of the boost inverter device of the emergency lighting circuit and adjusting the power of the load lighting equipment according to the input end power signal, it also includes: controlling the dimming switching device of the emergency lighting circuit to switch to the emergency dimming operation state.

[0010] An emergency lighting circuit comprises: a charging management device, an emergency battery device, a boost inverter device, a power detection device, a power supply switching device and an emergency control device, wherein the charging management device is connected to an external power supply, the emergency battery device and the emergency control device are respectively connected to the charging management device, the emergency battery device is connected to the input end of the boost inverter device and the power detection device, the power detection device is connected to the emergency control device, the control end of the boost inverter device is connected to the emergency control device, the output end of the boost inverter device is connected to the power supply switching device, the power supply switching device is connected to an external power supply, the emergency control device is connected to the power supply switching device, the power supply switching device is connected to a load lighting device, and the emergency control device is connected to the load lighting device; the emergency control device is used to perform emergency lighting control according to the above-mentioned control method.

[0011] In one embodiment, the emergency lighting circuit further includes a dimming switching device, the emergency control device is connected to the load lighting equipment through the dimming switching device, and the dimming switching device is connected to an external dimming device.

[0012] In one embodiment, the emergency control device includes an emergency dimmer and a processor, the processor is connected to the emergency dimmer, the emergency dimmer and the processor are respectively connected to the dimming switching device, and the input end and control end of the charging management device, the power supply switching device, and the boost inverter device are respectively connected to the processor.

[0013] In one embodiment, the emergency battery device includes a storage battery and a sampling resistor, the first end of the storage battery is connected to the charging management device and the boost inverter device, the second end of the storage battery is connected to the first end of the sampling resistor, the charging management device and the power detection device, and the second end of the sampling resistor is connected to the boost inverter device.

[0014] An emergency lighting system comprises a load lighting device and the above-mentioned emergency lighting circuit, wherein the emergency control device is used to perform emergency lighting control according to the above-mentioned control method.

[0015] The above-mentioned emergency lighting circuit and its control method, as well as the emergency lighting system, monitor whether the lighting is normal by detecting whether there is power input to the charging management device in the emergency lighting circuit. When there is no power input to the charging management device, it indicates that the power supply of the external power supply has failed. At this time, the emergency lighting will be started, and the power transmitted to the load lighting device will be switched to the emergency battery device through the power switching device, and the suitable power will be provided to the load lighting device after being processed by the boost inverter device. At the same time, the power detection device detects the input power signal of the boost inverter device, and adjusts the power of the load lighting device through the input power signal to realize the emergency lighting operation. The above-mentioned scheme realizes the operation power adjustment of the load lighting device through the input power signal of the boost inverter device. The input voltage of the boost inverter device is a DC low voltage, which is easy to detect; and the scheme does not need to isolate the high voltage voltage and current for power detection, which effectively reduces the detection cost and has strong power detection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of a control method for an emergency lighting circuit in an embodiment;

[0018] Figure 2 This is a schematic diagram of the structure of an emergency lighting circuit in one embodiment;

[0019] Figure 3 A schematic flow chart of a control method for an emergency lighting circuit in another embodiment;

[0020] Figure 4 It is a schematic flow chart of a control method of an emergency lighting circuit in another embodiment;

[0021] Figure 5A schematic diagram of a control method for an emergency lighting circuit in yet another embodiment;

[0022] Figure 6 This is a schematic diagram of the structure of an emergency lighting circuit in another embodiment;

[0023] Figure 7 FIG. 2 is a schematic diagram of the structure of an emergency lighting circuit in another embodiment. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0025] See also Figure 1 , a control method for an emergency lighting circuit includes step S100, step S200 and step S300.

[0026] Step S100, detecting in real time whether the charging management device of the emergency lighting circuit has power input.

[0027] Specifically, the charging management device is a device that uses an external power supply to manage the charging of the energy storage device. Since the external power supply is generally an AC power supply, the charging management device generally includes an AC-DC converter (such as a rectifier), a current limiting device, and a voltage limiting device. The charging management device can convert the external AC power supply into a DC power supply of the voltage or current required by the energy storage device, so as to realize the charging of the energy storage device and ensure charging safety. In the scheme of this embodiment, the emergency lighting circuit is provided with an emergency control device, which is connected to the charging management device and can collect the AC voltage signal input to the charging management device or the DC voltage signal converted by the charging management device according to the AC voltage signal in real time, so as to detect whether the external AC power supply is normally connected to power the load lighting equipment.

[0028] It should be pointed out that the specific structure of the charging management device is not unique, as long as it has the AC-DC conversion function and the current limiting charging and voltage limiting charging functions for the energy storage device. For example, in a more detailed embodiment, the charging management device is connected to an external AC power supply, and a fuse is set at the connection with the live wire of the external AC power supply, and then a rectifier device is connected behind the fuse to perform AC-DC conversion, and finally the DC power output by the rectifier device is transformed, current limited, etc., to achieve voltage limiting and current limiting charging of the back-end emergency battery device.

[0029] Step S200, when there is no power input to the charging management device, the power supply switching device of the emergency lighting circuit is controlled to switch to powering the load lighting equipment through the emergency battery device of the emergency lighting circuit.

[0030] Specifically, the lack of power input to the charging management device may be due to the lack of AC power input at the input end of the charging management device, or the lack of DC output at the DC output end of the charging management device. In either case, it indicates that the external power supply connected to the charging management device has failed. The external power supply is also used to power the load lighting equipment. When it is detected that the charging management device has no power input, it means that the external power supply cannot normally power the load lighting equipment. At this time, the emergency control device will switch the power supply line through the power supply switching device, and switch the line that was originally powered by the external power supply directly to the load lighting equipment to power the load lighting equipment through the power stored in the emergency battery device.

[0031] It should be noted that the specific type of the power supply switching device is not unique. In one embodiment, the power supply switching device is specifically a switch device. When performing power supply switching, the emergency control device only needs to control the switch device corresponding to the emergency battery device to be turned on, or the switch device corresponding to the external power supply to be turned on, so as to realize the power supply line switching operation. The specific type of the switch device is not unique, and a transistor, a relay, etc. can be used, as long as the switch function can be realized under the control of the emergency control device.

[0032] Step S300, obtaining an input-end power signal of a boost inverter device of an emergency lighting circuit, and performing power regulation on a load lighting device according to the input-end power signal.

[0033] Specifically, the input power signal is detected and sent by the power detection device of the emergency lighting circuit. Please refer to Figure 2 The charging management device 10 and the power supply switching device 60 are connected to an external power supply, the charging management device 10 is connected to the emergency battery device 20, the emergency battery device 20 is connected to the input end of the boost inverter device 30 and the power detection device 40, the output end of the boost inverter device 30 is connected to the power supply switching device 60, and the power supply switching device 60 is connected to the load lighting equipment.

[0034] In the solution of this embodiment, the charging management device 10, the power supply switching device 60, the power detection device 40 and the boost inverter device 30 are all connected to the emergency control device 50. After entering the emergency lighting state, the electric energy stored in the emergency charging device will be released. Through the boost and inversion of the boost inverter device 30, the originally stored low-voltage direct current is converted into electric energy with a higher voltage, thereby realizing the power supply operation of the load lighting equipment. At the same time, a power detection device 40 is also provided between the input end of the boost inverter device 30 and the output of the emergency battery device 20. When the emergency lighting is started, the power device can detect the input end power signal of the input end of the boost inverter device 30 in real time, and then output a corresponding dimming signal to the load lighting equipment in combination with the input end power signal, thereby adjusting the load lighting equipment to the corresponding power operation.

[0035] Similarly, the specific structure of the boost inverter device 30 is not unique. In one embodiment, the boost inverter device 30 may include two parts, namely an inverter and a boost transformer. The inverter is connected to the emergency battery device 20, and the boost transformer is connected to the inverter and the power supply switching device 60, so as to invert and boost the DC power output by the emergency battery device 20 to provide high-voltage power for the load lighting equipment.

[0036] See also Figure 3 In one embodiment, after step S100, the method further includes step S400.

[0037] Step S400, when the charging management device has power input, the power supply switching device of the emergency lighting circuit is controlled to switch to power the load lighting device through an external power supply.

[0038] Specifically, when the emergency lighting circuit is in operation, the emergency control device 50 detects whether the charging management device 10 has power input. If the charging management device 10 has power input, it means that the external power supply is valid, and the external power supply can supply power to the load lighting device. Therefore, at this time, the emergency control device 50 controls the power supply switching device 60 to switch to the circuit that supplies power to the load lighting device through the external power supply, so as to realize the lighting operation in the normal state. That is, if the emergency lighting state has been entered before, the power supply circuit is switched. If it is continuously detected that the charging management device 10 has power input, it is only necessary to maintain the current power supply circuit.

[0039] In one embodiment, when the charging management device has electric energy input, it also includes: receiving an external dimming signal input by a user, and adjusting the power of the load lighting device according to the external dimming signal.

[0040] Specifically, in this embodiment, when performing normal lighting operations, the emergency lighting circuit is also connected to a dimming device, and the user can input a dimming signal through the dimming device, thereby realizing power adjustment operation of the load lighting equipment under normal lighting conditions, so that the load lighting equipment can illuminate at the brightness required by the user, which can effectively improve the operational convenience of the emergency lighting circuit.

[0041] It should be noted that in the solution of this embodiment, the emergency lighting circuit further includes a dimming switching device, the emergency control device 50 is connected to the load lighting device through the dimming switching device, and the dimming switching device is connected to the external dimming device. Through the dimming switching device, the external dimming operation can be cut off in the emergency lighting state, and in the normal lighting state, the external dimming function is turned on, and the load lighting device is adjusted to the required power according to the dimming signal input by the user through the external dimming device.

[0042] See also Figure 4 In one embodiment, step S100 includes step S110 and step S120.

[0043] Step S110, collecting the input terminal voltage signal and the input terminal current signal of the boost inverter device of the emergency lighting circuit in real time; Step S120, obtaining the input terminal power signal according to the input terminal voltage signal and the input terminal current signal.

[0044] Specifically, the way in which the power detection device 40 acquires the input-end power signal of the boost inverter device 30 is not unique. In this embodiment, the emergency battery device 20 includes a storage battery and a sampling resistor. The first end of the storage battery is connected to the charging management device 10 and the boost inverter device 30. The second end of the storage battery is connected to the first end of the sampling resistor, the charging management device 10 and the power detection device 40. The second end of the sampling resistor is connected to the boost inverter device 30. Therefore, when acquiring the input-end power signal of the boost inverter device 30, it is only necessary to sample the voltage and current through the sampling resistor to obtain the input-end voltage signal and the input-end current signal of the boost inverter device 30, and the input-end power signal of the boost inverter device 30 can be directly calculated.

[0045] It is understandable that in other embodiments, other methods may be used to obtain the input power signal of the boost inverter device 30. For example, it may be directly implemented through a mutual inductor, a power sampling chip, etc.

[0046] See also Figure 5 In one embodiment, after step S200 and before step S300, the method further includes step S210.

[0047] Step S210, controlling the dimming switching device of the emergency lighting circuit to switch to the emergency dimming operation state.

[0048] Specifically, as shown above, the emergency lighting circuit also includes a dimming switching device, the emergency control device 50 is connected to the load lighting device through the dimming switching device, and the dimming switching device is connected to an external dimming device. Therefore, in this embodiment, after the emergency lighting circuit is controlled to enter the emergency lighting state, before the operating power of the load lighting device is adjusted according to the input end power signal of the boost inverter device 30, it is also necessary to control the dimming switching device to switch. Thus, the power adjustment of the load lighting device is achieved through automatic adjustment of the emergency control device 50.

[0049] Furthermore, in one embodiment, the operation of controlling the dimming switching device of the emergency lighting circuit to switch to the emergency dimming operation state also includes disconnecting the connection between the external dimming device and the load lighting device. That is, in this embodiment, in the emergency lighting state, the power adjustment of the load lighting device can only be achieved through the emergency control device 50, and the user cannot adjust it according to his own needs, thereby ensuring the operation stability of the emergency lighting state. It can be understood that in another embodiment, the connection between the external dimming device and the load lighting device may not be disconnected, so that even in the emergency lighting state, the corresponding power adjustment can be performed according to the user's needs.

[0050] It should be noted that the specific type of the dimming switching device is not unique. In one embodiment, similar to the above-mentioned power supply switching device 60, the dimming switching device can also be a switch device. When switching the dimming mode, it is only necessary for the emergency control device 50 to control the switch device corresponding to the required dimming channel to be turned on. The specific type of the switch device is not unique, and a transistor, a relay, etc. can be used, as long as the switch function can be realized under the control of the emergency control device 50.

[0051] The control method of the emergency lighting circuit described above monitors whether the lighting is normal by detecting whether there is power input to the charging management device 10 in the emergency lighting circuit. When there is no power input to the charging management device 10, it indicates that the power supply of the external power supply has failed. At this time, the emergency lighting will be started, and the power transmitted to the load lighting device will be switched to the emergency battery device 20 through the power switching device 60, and the power will be provided to the load lighting device after being processed by the boost inverter device 30. At the same time, the power detection device 40 detects the input power signal of the boost inverter device 30, and adjusts the power of the load lighting device through the input power signal to realize the emergency lighting operation. The above scheme realizes the operation power adjustment of the load lighting device through the input power signal of the boost inverter device 30. The input voltage of the boost inverter device 30 is a DC low voltage, which is easy to detect; and the scheme does not need to isolate the high voltage voltage and current for power detection, which effectively reduces the detection cost and has strong power detection reliability.

[0052] See also Figure 2 An emergency lighting circuit includes: a charging management device 10, an emergency battery device 20, a boost inverter device 30, a power detection device 40, a power supply switching device 60 and an emergency control device 50, wherein the charging management device 10 is connected to an external power supply, the emergency battery device 20 and the emergency control device 50 are respectively connected to the charging management device 10, the emergency battery device 20 is connected to the input end of the boost inverter device 30 and the power detection device 40, the power detection device 40 is connected to the emergency control device 50, the control end of the boost inverter device 30 is connected to the emergency control device 50, the output end of the boost inverter device 30 is connected to the power supply switching device 60, the power supply switching device 60 is connected to an external power supply, the emergency control device 50 is connected to the power supply switching device 60, the power supply switching device 60 is connected to a load lighting device, and the emergency control device 50 is connected to the load lighting device; the emergency control device 50 is used to perform emergency lighting control according to the above-mentioned control method.

[0053] Specifically, the charging management device 10 is a device that uses an external power supply to manage the charging of the energy storage device. In the solution of this embodiment, the emergency lighting circuit is provided with an emergency control device 50, which is connected to the charging management device 10 and can collect the AC voltage signal input to the charging management device 10 or the DC voltage signal converted by the charging management device 10 according to the AC voltage signal in real time, so as to detect whether the external AC power supply is normally connected to the load lighting device.

[0054] It should be noted that the specific structure of the charging management device 10 is not unique, as long as it has the AC-DC conversion function and the current limiting charging and voltage limiting charging functions for the energy storage device. Figure 6 The charging management device 10 is connected to an external AC power supply, and a fuse is set at the connection with the live wire of the external AC power supply. Then, a rectifier device is connected behind the fuse to perform AC-DC conversion. Finally, the DC power supply output by the rectifier device is transformed and current limited to achieve voltage-limited and current-limited charging of the rear-end emergency battery device 50.

[0055] The lack of power input to the charging management device 10 may be due to the lack of AC power input at the input end of the charging management device 10, or the lack of DC output at the DC output end of the charging management device 10. In either case, it indicates that the external power supply connected to the charging management device 10 has failed. The external power supply is also used to power the load lighting equipment. When it is detected that the charging management device 10 has no power input, it means that the external power supply cannot normally power the load lighting equipment. At this time, the emergency control device 50 will switch the power supply line through the power supply switching device 60, and switch the line that originally directly charges the load lighting equipment by the external power supply to power the load lighting equipment through the power stored in the emergency battery device 20.

[0056] It should be noted that the specific type of the power supply switching device 60 is not unique. In one embodiment, the power supply switching device 60 may be used in combination with the power supply switching device 60 of FIG. Figure 6 The power supply switching device 60 is specifically a switch device. When switching the power supply, the emergency control device 50 only needs to control the switch device corresponding to the emergency battery device 20 to be turned on, or the switch device corresponding to the external power supply to be turned on, so as to realize the power supply line switching operation. The specific type of the switch device is not limited, and a transistor, a relay, etc. can be used, as long as the switch function can be realized under the control of the emergency control device 50.

[0057] After entering the emergency lighting state, the electric energy stored in the emergency charging device will be released, and the originally stored low-voltage direct current will be converted into electric energy with a higher voltage through the boost and inversion action of the boost inverter device 30, thereby realizing the power supply operation for the load lighting equipment. At the same time, a power detection device 40 is also provided between the input end of the boost inverter device 30 and the output of the emergency battery device 20. When the emergency lighting is started, the power device can detect the input end power signal of the input end of the boost inverter device 30 in real time, and then combine the input end power signal to output a corresponding dimming signal to the load lighting equipment, thereby adjusting the load lighting equipment to the corresponding power operation.

[0058] The specific structure of the boost inverter device 30 is not unique. In one embodiment, please refer to Figure 6 The boost inverter device 30 may include two parts, namely, an inverter and a boost transformer. The inverter is connected to the emergency battery device 20, and the boost transformer is connected to the inverter and the power supply switching device 60, so as to invert and boost the DC power output by the emergency battery device 20 to provide high-voltage power for the load lighting equipment.

[0059] See also Figure 7In one embodiment, the emergency lighting circuit further includes a dimming switching device 70, the emergency control device 50 is connected to the load lighting device through the dimming switching device 70, and the dimming switching device 70 is connected to an external dimming device.

[0060] Specifically, in the solution of this embodiment, the emergency lighting circuit further includes a dimming switching device 70, the emergency control device 50 is connected to the load lighting device through the dimming switching device 70, and the dimming switching device 70 is connected to the external dimming device. Through the dimming switching device 70, the external dimming operation can be cut off in the emergency lighting state, and in the normal lighting state, the external dimming function is turned on, and the load lighting device is adjusted to the required power according to the dimming signal input by the user through the external dimming device.

[0061] See also Figure 7 In one embodiment, the emergency control device 50 includes an emergency dimmer 52 and a processor 51 (specifically, it can be a single-chip microcomputer or a micro control unit), the processor 51 is connected to the emergency dimmer 52, the emergency dimmer 52 and the processor 51 are respectively connected to the dimming switching device 70, and the input end and control end of the charging management device 10, the power supply switching device 60, and the boost inverter device 30 are respectively connected to the processor 51.

[0062] Specifically, the emergency lighting circuit further includes a dimming switching device 70, the emergency dimmer 52 of the emergency control device 50 is connected to the load lighting device through the dimming switching device 70, and the dimming switching device 70 is connected to an external dimming device. Therefore, in this embodiment, after the emergency lighting circuit is controlled to enter the emergency lighting state, before the operating power of the load lighting device is adjusted according to the input end power signal of the boost inverter device 30, the processor 51 will also switch the dimming switching device 70, so that the emergency dimmer 52 is connected to the load lighting device through the dimming switching device 70, so that the power adjustment of the load lighting device is achieved through the automatic adjustment of the emergency dimmer 52.

[0063] It can be understood that in one embodiment, while the emergency dimmer 52 realizes automatic power adjustment of the load lighting device, the processor 51 can also control the dimming switching device 70 to realize dimming switching. In one embodiment, the dimming switching operation of the dimming switching device 70 can be realized by the emergency dimmer 52 and the processor 51 in parallel, or can be realized by only one of the emergency dimmer 52 or the processor 51.

[0064] Furthermore, in one embodiment, the operation of controlling the dimming switching device 70 of the emergency lighting circuit to switch to the emergency dimming operation state also includes disconnecting the connection between the external dimming device and the load lighting device. That is, in this embodiment, in the emergency lighting state, the power adjustment of the load lighting device can only be achieved through the emergency control device 50, and the user cannot adjust it according to his own needs, thereby ensuring the operation stability of the emergency lighting state. It can be understood that in another embodiment, the connection between the external dimming device and the load lighting device may not be disconnected, so that even in the emergency lighting state, the corresponding power adjustment can be performed according to the user's needs.

[0065] It should be noted that the specific type of the dimming switching device 70 is not unique. Figure 6 In one embodiment, similar to the power supply switching device 60, the dimming switching device 70 can also be a switch device. When switching the dimming mode, the emergency control device 50 only needs to control the switch device corresponding to the required dimming channel to be turned on. The specific type of the switch device is not limited, and a transistor, a relay, etc. can be used, as long as the switch function can be realized under the control of the emergency control device 50.

[0066] Please refer to Figure 6 In one embodiment, the emergency battery device 20 includes a battery and a sampling resistor, the first end of the battery is connected to the charging management device 10 and the boost inverter device 30, the second end of the battery is connected to the first end of the sampling resistor, the charging management device 10 and the power detection device 40, and the second end of the sampling resistor is connected to the boost inverter device 30.

[0067] Specifically, in the scheme of this embodiment, when acquiring the input power signal of the boost inverter device 30, it is only necessary to sample the voltage and current through the sampling resistor to obtain the input voltage signal and the input current signal of the boost inverter device 30, and the input power signal of the boost inverter device 30 can be directly calculated.

[0068] It is understandable that in other embodiments, other methods may be used to obtain the input power signal of the boost inverter device 30. For example, it may be directly implemented through a mutual inductor, a power sampling chip, etc.

[0069] The above-mentioned emergency lighting circuit monitors whether the lighting is normal by detecting whether there is power input to the charging management device 10 in the emergency lighting circuit. When there is no power input to the charging management device 10, it means that the power supply of the external power supply fails. At this time, the emergency lighting will be started, and the power transmitted to the load lighting equipment will be switched to the emergency battery device 20 through the power switching device 60, and the power will be provided to the load lighting equipment after being processed by the boost inverter device 30. Suitable power. At the same time, the power detection device 40 detects the input end power signal of the boost inverter device 30, and adjusts the power of the load lighting equipment through the input end power signal to realize the emergency lighting operation. The above scheme realizes the operation power adjustment of the load lighting equipment through the input end power signal of the boost inverter device 30. The input end voltage of the boost inverter device 30 is a DC low voltage, which is easy to detect; and the scheme does not need to isolate high voltage voltage and current for power detection, effectively reducing the detection cost, and has strong power detection reliability.

[0070] An emergency lighting system includes a load lighting device and the above-mentioned emergency lighting circuit. The emergency control device 50 is used to perform emergency lighting control according to the above-mentioned control method.

[0071] Specifically, the emergency lighting circuit is as shown in the above embodiments and the accompanying drawings, and the charging management device 10 is a device that uses an external power supply to manage the charging of the energy storage device. In the scheme of this embodiment, the emergency lighting circuit is provided with an emergency control device 50, which is connected to the charging management device 10 and can collect the AC voltage signal input to the charging management device 10 or the DC voltage signal converted by the charging management device 10 according to the AC voltage signal in real time, so as to detect whether the external AC power supply is normally connected to the load lighting equipment.

[0072] The lack of power input to the charging management device 10 may be due to the lack of AC power input at the input end of the charging management device 10, or the lack of DC output at the DC output end of the charging management device 10. In either case, it indicates that the external power supply connected to the charging management device 10 has failed. The external power supply is also used to power the load lighting equipment. When it is detected that the charging management device 10 has no power input, it means that the external power supply cannot normally power the load lighting equipment. At this time, the emergency control device 50 will switch the power supply line through the power supply switching device 60, and switch the line that originally directly charges the load lighting equipment by the external power supply to power the load lighting equipment through the power stored in the emergency battery device 20.

[0073] After entering the emergency lighting state, the electric energy stored in the emergency charging device will be released, and the originally stored low-voltage direct current will be converted into electric energy with a higher voltage through the boost and inversion action of the boost inverter device 30, thereby realizing the power supply operation for the load lighting equipment. At the same time, a power detection device 40 is also provided between the input end of the boost inverter device 30 and the output of the emergency battery device 20. When the emergency lighting is started, the power device can detect the input end power signal of the input end of the boost inverter device 30 in real time, and then combine the input end power signal to output a corresponding dimming signal to the load lighting equipment, thereby adjusting the load lighting equipment to the corresponding power operation.

[0074] The above-mentioned emergency lighting system monitors whether the lighting is normal by detecting whether there is power input to the charging management device 10 in the emergency lighting circuit. When there is no power input to the charging management device 10, it indicates that the power supply of the external power supply has failed. At this time, the emergency lighting will be started, and the power transmitted to the load lighting equipment will be switched to the emergency battery device 20 through the power supply switching device 60, and the power will be provided to the load lighting equipment after being processed by the boost inverter device 30. Suitable power. At the same time, the power detection device 40 detects the input end power signal of the boost inverter device 30, and adjusts the power of the load lighting equipment through the input end power signal to realize the emergency lighting operation. The above-mentioned scheme realizes the operation power adjustment of the load lighting equipment through the input end power signal of the boost inverter device 30. The input end voltage of the boost inverter device 30 is a DC low voltage, which is easy to detect; and the scheme does not need to isolate the high voltage voltage and current for power detection, which effectively reduces the detection cost and has strong power detection reliability.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A control method for an emergency lighting circuit, characterized in that: include: Real-time detection of whether the charging management device of the emergency lighting circuit has power input; When there is no power input to the charging management device, the power supply switching device of the emergency lighting circuit is controlled to switch to power the load lighting equipment through the emergency battery device of the emergency lighting circuit; Control the dimming switching device of the emergency lighting circuit to switch to the emergency dimming operation state; The control of the dimming switching device of the emergency lighting circuit to switch to the emergency dimming operation state includes: cutting off the connection between the external dimming device and the load lighting equipment; The input end power signal of the boost inverter device of the emergency lighting circuit is obtained, and the power of the load lighting device is adjusted according to the input end power signal; the input end power signal is detected and sent by the power detection device of the emergency lighting circuit, the charging management device and the power supply switching device are connected to an external power supply, the charging management device is connected to the emergency battery device, the emergency battery device is connected to the input end of the boost inverter device and the power detection device, the output end of the boost inverter device is connected to the power supply switching device, and the power supply switching device is connected to the load lighting device; The emergency battery device comprises a storage battery and a sampling resistor, wherein a first end of the storage battery is connected to the charging management device and the boost inverter device, a second end of the storage battery is connected to a first end of the sampling resistor, the charging management device and the power detection device, and a second end of the sampling resistor is connected to the boost inverter device; The step of obtaining the input end power signal of the boost inverter device of the emergency lighting circuit includes: Real-time acquisition of input terminal voltage signal and input terminal current signal of the boost inverter device of the emergency lighting circuit; An input-end power signal is obtained according to the input-end voltage signal and the input-end current signal.

2. The control method according to claim 1, characterized in that: After the step of detecting in real time whether the charging management device of the emergency lighting circuit has electric energy input, the method further includes: When the charging management device has electric energy input, the power supply switching device controlling the emergency lighting circuit switches to supply power to the load lighting device through an external power supply.

3. The control method according to claim 2, characterized in that: When the charging management device has electric energy input, it also includes: receiving an external dimming signal input by a user, and adjusting the power of the load lighting device according to the external dimming signal.

4. An emergency lighting circuit, characterized in that: include: Charging management device, emergency battery device, boost inverter device, power detection device, power supply switching device and emergency control device, The charging management device is connected to an external power supply, the emergency battery device and the emergency control device are respectively connected to the charging management device, the emergency battery device is connected to the input end of the boost inverter device and the power detection device, the power detection device is connected to the emergency control device, the control end of the boost inverter device is connected to the emergency control device, the output end of the boost inverter device is connected to the power supply switching device, the power supply switching device is connected to an external power supply, the emergency control device is connected to the power supply switching device, the power supply switching device is connected to a load lighting device, and the emergency control device is connected to a load lighting device; The emergency lighting circuit also includes a dimming switching device, the emergency control device is connected to the load lighting equipment through the dimming switching device, and the dimming switching device is connected to an external dimming device; The emergency battery device comprises a storage battery and a sampling resistor, wherein a first end of the storage battery is connected to the charging management device and the boost inverter device, a second end of the storage battery is connected to a first end of the sampling resistor, the charging management device and the power detection device, and a second end of the sampling resistor is connected to the boost inverter device; The emergency control device is used to perform emergency lighting control according to the control method according to any one of claims 1-3.

5. The emergency lighting circuit according to claim 4, characterized in that: The emergency control device includes an emergency dimmer and a processor, the processor is connected to the emergency dimmer, the emergency dimmer and the processor are respectively connected to the dimming switching device, and the input end and control end of the charging management device, the power supply switching device, and the boost inverter device are respectively connected to the processor.

6. An emergency lighting system, characterized in that: It comprises a load lighting device and the emergency lighting circuit according to claim 4 or 5, and the emergency control device is used to perform emergency lighting control according to the control method according to any one of claims 1-3.

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