CN211860603U - Lamp emergency module - Google Patents

Abstract

The utility model is suitable for a lighting circuit technical field provides a lamps and lanterns emergency module, include: the emergency power supply circuit, the emergency control circuit and the emergency light source circuit; the emergency power supply circuit converts commercial power into battery voltage to supply power for the emergency control circuit and the emergency light source circuit; the emergency control circuit generates a PWM signal when detecting that the impedance of the two ends of the commercial power zero line and the commercial power live line is smaller than a threshold value, and sends the PWM signal to the emergency light source circuit; and the emergency light source circuit controls the on and off of the emergency light source according to the PWM signal. The utility model provides a lamps and lanterns emergency module can the direct mount in various lamps and lanterns, and need not to change the drive circuit and the light source lamp pearl of original lamps and lanterns, makes the automatic luminous of emergency light source under the condition that the power failure appears in the commercial power, conveniently plays emergency lighting's effect.

Description

A lighting emergency module

technical field

The utility model belongs to the technical field of lighting circuits, in particular to a lamp emergency module.

Background technique

The current mains-powered lamps can only achieve the function of lighting when the mains is normal. When encountering a power failure, it will immediately stop emitting light, causing inconvenience to users. In special environments such as production workshops, the lighting suddenly loses. It may also cause an accident and endanger the safety of the user.

Utility model content

In view of this, the embodiment of the present invention provides a lamp emergency module to solve the problem that the lamp cannot be illuminated in the case of a power failure in the prior art.

A first aspect of the embodiments of the present utility model provides a lamp emergency module, including: an emergency power supply circuit, an emergency control circuit and an emergency light source circuit;

The input end of the emergency power supply circuit and the AC input impedance detection end of the emergency control circuit are respectively connected to the commercial power; the output end of the emergency power supply circuit is respectively connected to the input end of the emergency control circuit and the emergency light source circuit The output terminal of the emergency control circuit is connected to the signal input terminal of the emergency light source circuit;

The emergency power supply circuit converts the commercial power into battery voltage, and provides the battery voltage to the emergency control circuit and the emergency light source circuit;

The emergency control circuit generates a PWM signal when the AC input impedance detection terminal detects that the impedance at both ends of the mains zero live wire is less than a threshold value, and sends the PWM signal to the emergency light source circuit;

The emergency light source circuit controls the emergency light source to turn on and off according to the PWM signal.

In an embodiment of the present invention, the emergency power supply circuit includes a constant voltage circuit and a battery management circuit;

The input end of the constant voltage circuit is the input end of the emergency power supply circuit, the output end of the constant voltage circuit is connected to the input end of the battery management circuit; the output end of the battery management circuit is the emergency power supply circuit the output terminal;

The constant voltage circuit converts the commercial power into a constant voltage, and provides the constant voltage to the battery management circuit;

The battery management circuit converts the constant voltage into the battery voltage, and provides the battery voltage to the emergency control circuit and the emergency light source circuit.

In an embodiment of the present invention, the constant voltage circuit includes a rectifier bridge circuit that converts commercial power from an AC voltage to a DC voltage, a filter circuit that filters the DC voltage, and a filter circuit that filters the DC voltage. A constant voltage chip circuit that converts the voltage into a constant voltage;

The first AC input terminal of the rectifier bridge circuit is connected to the mains live wire, the second AC input terminal of the rectifier bridge circuit is connected to the mains neutral wire, and the first DC output of the rectifier bridge circuit The terminal is connected to the input terminal of the filter circuit, the second DC output terminal of the rectifier bridge circuit is grounded; the output terminal of the filter circuit is connected to the input terminal of the constant voltage chip circuit, and the output terminal of the constant voltage chip circuit is connected to the ground. The output terminal is the output terminal of the constant voltage circuit.

In an embodiment of the present invention, the battery management circuit includes a battery management chip, a battery pack and a thermistor;

The voltage input pin of the battery management chip is connected to the voltage input end of the battery management circuit; the positive electrode of the battery pack serves as the voltage output end of the battery management circuit and the battery voltage detection pin of the battery management chip connected, the negative electrode of the battery pack is grounded; the first end of the thermistor is connected to the battery temperature detection input pin of the battery management chip, and the second end of the thermistor is grounded.

In an embodiment of the present utility model, the lamp emergency module further includes a first normally closed switch;

The first normally closed switch is connected in series between the positive electrode of the battery pack and the battery voltage detection pin of the battery management chip.

In an embodiment of the present invention, the battery management circuit further includes a charging indicator light;

The charging indicator light is connected between the voltage input pin and the status pin of the battery management chip.

In an embodiment of the present invention, the electric AC input impedance detection terminal of the emergency control circuit includes a first impedance detection terminal and a second impedance detection terminal, and the first impedance detection terminal is connected to the neutral line of the commercial power, so The second impedance detection terminal is connected to the mains live wire; the emergency control circuit includes an emergency chip; the emergency chip includes a neutral wire detection pin and a live wire detection pin;

The neutral wire detection pin is connected to the first impedance detection terminal of the emergency control circuit, the live wire detection pin is connected to the second impedance detection terminal of the emergency control circuit; the voltage input terminal of the emergency chip is connected to The voltage input end of the emergency control circuit; the enabling pin of the emergency chip is the output end of the emergency control circuit.

In an embodiment of the present utility model, the lamp emergency module further includes a first normally open switch for performing a power failure test;

The first end of the first normally open switch is connected to the zero line detection pin of the emergency chip, and the second end of the first normally open switch is connected to the live line detection pin of the emergency chip.

In an embodiment of the present invention, the emergency light source circuit includes a booster chip and an emergency light string;

The voltage input end of the booster chip is connected to the voltage input end of the emergency light source circuit; the signal input end of the booster chip is connected to the signal input end of the emergency light source circuit; the output end of the booster chip is connected to the The positive pole of the emergency light string; the negative pole of the emergency light string is grounded.

A second aspect of the present invention provides a lamp, comprising a lamp module and the above-mentioned lamp emergency module, wherein both the lamp module and the lamp emergency module are connected to the mains;

The lamp module is used for receiving commercial power to generate a light source;

The lamp emergency module is used for charging and storing energy according to the received mains power, and generating an emergency light source when the impedance at both ends of the zero live wire of the mains is less than a threshold value.

Compared with the prior art, the embodiments of the present utility model have the following beneficial effects: the present utility model provides a lamp emergency module, including: an emergency power supply circuit, an emergency control circuit and an emergency light source circuit; the emergency power supply circuit converts the commercial power into The battery voltage supplies power to the emergency control circuit and the emergency light source circuit; the emergency control circuit generates a PWM signal when the detected impedance at both ends of the neutral live line of the mains is less than the threshold, and sends the PWM signal to the emergency light source circuit; the emergency light source circuit controls the emergency light source circuit according to the PWM signal The light source turns on and off. The lamp emergency module provided by the utility model can be directly installed in various lamps without changing the driving circuit and the light source lamp beads of the original lamp, so that the emergency light source automatically emits light in the event of a power failure in the mains, which is convenient for emergency use. The role of lighting.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present utility model. For some novel embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a block diagram of a lamp emergency module provided by an embodiment of the present invention;

2 is a circuit diagram of a constant voltage circuit provided by an embodiment of the present invention;

3 is a circuit diagram of a battery management circuit provided by an embodiment of the present invention;

4 is a circuit diagram of an emergency control circuit provided by an embodiment of the present invention;

5 is a circuit diagram of an emergency light source circuit provided by an embodiment of the present invention;

6 is a circuit diagram of a three-speed dial switch provided by an embodiment of the present invention;

FIG. 7 is a schematic block diagram of a lamp provided by an embodiment of the present invention.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to illustrate the technical solutions of the present utility model, the following specific embodiments are used to illustrate.

Referring to FIG. 1, a first aspect of the embodiment of the present invention provides a lighting emergency module 20, including:

Emergency power supply circuit 100, emergency control circuit 200 and emergency light source circuit 300;

The input end of the emergency power supply circuit 100 and the AC input impedance detection end of the emergency control circuit 200 are respectively connected to the mains; the output end of the emergency power supply circuit 100 is respectively connected to the input end of the emergency control circuit 200 and the voltage input end of the emergency light source circuit 300 ; The output end of the emergency control circuit 200 is connected to the signal input end of the emergency light source circuit 300;

The emergency power supply circuit 100 converts the commercial power into battery voltage, and provides the battery voltage to the emergency control circuit 200 and the emergency light source circuit 300;

The emergency control circuit 200 generates a PWM signal when the AC input impedance detection terminal detects that the impedance at both ends of the mains neutral wire is less than a threshold value, and sends the PWM signal to the emergency light source circuit 300;

The emergency light source circuit 300 controls the emergency light source to turn on and off according to the PWM signal.

Specifically, the threshold of the impedance at both ends of the neutral live wire of the commercial power is 500K ohms.

In this embodiment, when the commercial power is normal, the commercial power supplies power to the emergency power supply circuit 100, so that the emergency power supply circuit 100 charges and stores energy; the emergency power supply circuit 100 supplies power to the emergency control circuit 200 and the emergency light source circuit 300; When the mains power fails, the AC input impedance detection terminal of the emergency control circuit 200 detects that the impedance at both ends of the mains neutral wire is less than 500K ohms. At this time, the emergency control circuit 200 generates a PWM signal and sends the PWM signal to the emergency light source circuit 300. The light source circuit 300 emits light under the drive of the PWM signal; when the commercial power returns to normal, the AC input impedance detection terminal of the emergency control circuit 200 detects that the impedance at both ends of the neutral live wire of the commercial power is greater than 500K ohms, and the emergency control circuit 200 stops generating the PWM signal, The emergency light source circuit 300 stops receiving the PWM signal and stops emitting light.

In an embodiment of the present invention, the emergency power supply circuit 100 includes a constant voltage circuit and a battery management circuit;

As shown in Figure 2, Figure 2 shows the circuit schematic diagram of the constant voltage circuit, which is detailed as follows:

The input end of the constant voltage circuit is the input end of the emergency power supply circuit 100, the output end of the constant voltage circuit is connected to the input end of the battery management circuit; the output end of the battery management circuit is the output end of the emergency power supply circuit 100;

The constant voltage circuit converts the commercial power into a constant voltage and provides a constant voltage to the battery management circuit;

The battery management circuit converts the constant voltage into the battery voltage, and supplies the battery voltage to the emergency control circuit 200 and the emergency light source circuit 300 .

In an embodiment of the present invention, the constant voltage circuit includes a rectifier bridge circuit BD1 that converts the commercial power from an AC voltage to a DC voltage, a filter circuit that filters the DC voltage, and converts the filtered DC voltage into a Constant voltage chip circuit with constant voltage;

The first AC input terminal of the rectifier bridge circuit BD1 is connected to the mains live wire, the second AC input terminal of the rectifier bridge circuit BD1 is connected to the mains neutral wire, and the first DC output terminal of the rectifier bridge circuit BD1 is connected to the input terminal of the filter circuit connected, the second DC output end of the rectifier bridge circuit BD1 is grounded; the output end of the filter circuit is connected to the input end of the constant voltage chip circuit, and the output end of the constant voltage chip circuit is the output end of the constant voltage circuit.

In this embodiment, the filter circuit includes a first capacitor C1, a second capacitor C2, a first resistor R1 and a first inductor L1; the constant voltage chip circuit includes a constant voltage chip U1, a second resistor R2, a third resistor R3, a Four resistors R4, fifth resistors R5, second inductors L2, third capacitors C3, fourth capacitors C4, first diodes D1 and second diodes D2.

Specifically, the mains live wire is connected to the first AC input terminal of the rectifier bridge circuit BD1 through the fuse FR1, and the mains neutral wire is connected to the second AC input terminal of the rectifier bridge circuit BD1; the first DC output terminal of the rectifier bridge circuit BD1 is connected to the The input end of the filter circuit is connected; the second DC output end of the rectifier bridge circuit BD1 is grounded.

The input end of the filter circuit is respectively connected to the first end of the first inductor L1, the first end of the first resistor R1 and the first end of the first capacitor C1, the second end of the first inductor L1 and the first end of the first resistor R1. The two terminals and the first terminal of the second capacitor C2 are respectively connected to the output terminal of the filter circuit; the second terminal of the first capacitor C1 and the second terminal of the second capacitor C2 share the ground.

The input end of the constant voltage chip circuit is connected to the Drain pin of the constant voltage chip U1, the VDD pin of the constant voltage chip U1 is grounded, the GND pin is grounded through the second resistor R2, and the FB pin is connected to the first end of the third resistor R3 and the first end of the fourth resistor R4, the CS pin of the constant voltage chip U1 is connected to the second end of the fourth resistor R4, the first end of the third capacitor C3 and the negative electrode of the second diode D2; the fourth resistor R4 The second end of the third capacitor C3 and the second end of the third capacitor C3 are connected to the first end of the second inductor L2 and the cathode of the first diode D1. The anode of the second diode D2, the second end of the second inductor L2, the first end of the fourth capacitor C4 and the first end of the fifth resistor R5 are commonly connected to the output end of the constant voltage chip circuit. The anode D1 of the first diode, the second end of the fourth capacitor C4 and the second end of the fifth resistor R5 share the ground.

In this embodiment, the constant voltage circuit converts the wide-voltage commercial power of 100V to 240V into a constant DC voltage of 5V.

In one embodiment of the present invention, referring to FIG. 3, FIG. 3 shows a schematic circuit diagram of a battery management circuit, and the details are as follows:

The battery management circuit includes a battery management chip U2, a battery pack BAT and a thermistor NTC;

The voltage input pin of the battery management chip U2 is connected to the voltage input end of the battery management circuit; the positive electrode of the battery pack BAT is used as the voltage output end of the battery management circuit to be connected to the battery voltage detection pin of the battery management chip U2, and the negative electrode of the battery pack BAT is connected to the battery voltage detection pin of the battery management chip U2. Ground; the first end of the thermistor NTC is connected to the battery temperature detection input pin of the battery management chip U2, and the second end of the thermistor NTC is grounded.

In an embodiment of the present invention, the emergency lamp module further includes a first normally closed switch P3;

Referring to FIG. 6 , the first normally closed switch P3 is connected in series between the positive electrode of the battery pack BAT and the battery voltage detection pin of the battery management chip U2.

In an embodiment of the present invention, the battery management circuit further includes a charging indicator LED;

The charging indicator LED is connected between the voltage input pin and the status pin of the battery management chip U2.

In this embodiment, referring to FIG. 3 , the battery management circuit includes a battery management chip U2, a battery pack BAT, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a thermistor NTC, a fifth capacitor C5, and a sixth resistor R6. Capacitor C6, seventh capacitor C7, third inductor L3, third diode D3 and light emitting diode LED.

Specifically, the voltage input end of the battery management circuit is connected to the first end of the third inductor L3, the first end of the fifth capacitor C5, the first end of the sixth resistor R6, and the VIN pin of the battery management chip U2. The AGND pin of the battery management chip U2 is connected to the second end of the fifth capacitor C5 and grounded. The LX pin of the battery management chip U2 is connected to the second end of the third inductor L3 and the anode of the third diode D3. The VBS pin of the battery management chip U2 is connected to the negative electrode of the third diode D3 and the first end of the sixth capacitor C6, and the second end of the sixth capacitor C6 is grounded. The BAT pin of the battery management chip is connected to the first terminal of the seventh capacitor C7 and the voltage output terminal BAT+ of the battery management circuit, and the second terminal of the seventh capacitor C7 is grounded. A first normally closed switch P3 is connected in series between the positive electrode of the battery pack BAT and the battery voltage detection pin of the battery management chip U2. The negative electrode of the battery pack BAT is connected to the first end of the thermistor NTC and the first end of the eighth resistor R8 and is grounded. The second end of the thermistor NTC and the second end of the eighth resistor R8 are connected to the battery temperature detection input pin of the battery management chip. The ICHG pin of the battery management chip U2 is grounded through the seventh resistor R7. The STAT pin of the battery management chip U2 is connected to the positive pole of the charging indicator LED, and the negative pole of the charging indicator LED is connected to the second end of the sixth resistor R6.

In an embodiment, the battery pack BAT includes a dual-cell lithium battery.

In this embodiment, the battery management circuit has functions of trickle charge protection, overcharge protection, overdischarge protection and overtemperature protection. Specifically, when the battery management chip U2 detects that the battery pack BAT voltage is lower than 5.6V, it stops discharging; when the battery pack BAT voltage is lower than the trickle charging voltage of 6V, it performs trickle charging; when the battery pack BAT voltage is higher than the trickle charging voltage When the charging voltage is 6V, fast charging is performed until the battery pack BAT voltage reaches 8.4V, then the charging is stopped.

In this embodiment, the battery management chip U2 can perform charge stop protection for the battery pack BAT by monitoring the voltage on the thermistor NTC.

In this embodiment, the charging indicator LED is on when charging, and the charging indicator LED is turned off when fully charged; when the battery management chip U2 detects that the temperature of the battery pack BAT is abnormal, the output is short-circuited, the charging time is overtime, or the temperature is too high, The charging indicator LED will flash at a frequency of 1.6HZ.

In an embodiment of the present invention, as shown in FIG. 4 , FIG. 4 shows a schematic circuit diagram of the emergency control circuit 200 , and the details are as follows:

The AC input impedance detection terminal of the emergency control circuit 200 includes a first impedance detection terminal and a second impedance detection terminal, the first impedance detection terminal is connected to the neutral wire of the mains, and the second impedance detection terminal is connected to the live wire of the mains;

The emergency control circuit 200 includes an emergency chip U3; the emergency chip U3 includes a neutral line detection pin VN and a live line detection pin VL;

The neutral wire detection pin VN is connected to the first impedance detection terminal of the emergency control circuit, the live wire detection pin VL is connected to the second impedance detection terminal of the emergency control circuit; the voltage input terminal of the emergency chip U3 is connected to the voltage input terminal of the emergency control circuit ; The enable pin of the emergency chip is the output terminal of the emergency control circuit.

In this embodiment, the emergency control circuit includes an emergency chip U3, a ninth resistor R9, a tenth resistor R10, an eighth capacitor C8, a ninth capacitor C9 and a fourth diode D4.

Specifically, the VL pin of the emergency chip U3 is connected to the mains live wire, the VN pin of the emergency chip U3 is connected to the mains neutral line and the first end of the ninth capacitor C9, and the second end of the ninth capacitor C9 is connected to the emergency chip U3 The GND pin and the BATN pin share the same ground. The enable pin EN of the emergency chip U3 is connected to the output end of the emergency control circuit 200 through the ninth resistor R9. The BATP pin of the emergency chip U3 is connected to the first end of the tenth resistor R10, the negative electrode of the fourth diode D4 and the first end of the eighth capacitor C8, and the second end of the tenth resistor R10 is connected to the voltage of the emergency control circuit 200 The input terminal BAT+, the anode of the fourth diode D4 and the second terminal of the eighth capacitor C8 share the ground.

In this embodiment, the specific method for the emergency chip U3 to detect the mains power is to detect the impedance between the mains live line and the neutral line. When the impedance between the mains live line and the mains neutral line is greater than 500K ohms, the emergency chip U3 The enable pin does not output a signal; when the impedance between the mains live line and the mains neutral line is less than 500K ohms, the enable pin of the emergency chip U3 outputs a control signal, and the control signal is a high-level pulse width modulation PWM signal .

In an embodiment of the present invention, the emergency module of the lamp further includes a first normally open switch P1 for performing a power failure test;

4, the first end of the first normally open switch P1 is connected to the VN pin of the emergency chip U3, and the second end of the first normally open switch P1 is connected to the VL pin of the emergency chip U3.

Optionally, see FIG. 6 , which shows a circuit diagram of a third-speed dial switch. The first normally open switch P1 and the first normally closed switch P3 plus an empty switch P2 form a third-speed dial switch SW1.

Referring to Figure 3 and Figure 6, the first normally closed switch P3 is connected in series between the positive pole of the battery pack BAT and the battery voltage detection pin of the battery management chip U2, and is kept normally closed during the normal use of the lamp emergency module, that is, the battery pack The positive electrode of BAT is connected to the voltage output terminal of the battery management circuit, and the battery pack BAT supplies power to the emergency control circuit 200 and the emergency light source circuit 300 . When the third-speed DIP switch SW1 is turned to the first normally closed switch P3, that is, the first normally closed switch P3 is disconnected, the battery pack BAT is disconnected from the emergency control circuit 200 and the emergency light source circuit 300, and the lamp emergency module does not work at this time. , in order to protect the battery pack BAT and other components and reduce losses during the transportation of the emergency module of the luminaire or during the period of long-term non-use.

The first end of the first normally open switch P1 is connected to the VN pin of the emergency chip U3, and the second end is connected to the VL pin of the emergency chip. It is kept normally open during the normal use of the lamp emergency module, that is, it does not affect the emergency chip U3 to the market. Electrical detection function. The first normally open switch P1 is used to perform a power failure test, and only when the emergency module of the lamp is not installed on the mains, turn the third-speed dial switch SW1 to the first normally open switch P3. When the third gear switch SW1 is turned to the first normally open switch P1, that is, when the first normally open switch P1 is closed, the VN pin and the VL pin of the emergency chip U3 are short-circuited, and the impedance between the two pins is less than 500K ohms , the enable pin of the emergency chip outputs a PWM signal to control the emergency light source circuit 300 to emit light. At this time, it is possible to check whether the lamp emergency module can work normally without connecting the lamp emergency module to the mains.

Both ends of the vacant switch P2 are vacant. When the third-speed DIP switch SW1 is turned to the vacant switch P2, the first normally closed switch P3 is normally closed, and the first normally open switch P1 is normally open. At this time, the battery pack BAT of the lamp emergency module is normal. Power is supplied to the emergency control circuit 200 and the emergency light source circuit 300, and the emergency control circuit 200 detects the commercial power normally, that is, the emergency module of the lamp works in a normal state at this time.

Referring to FIG. 5, FIG. 5 shows a schematic circuit diagram of the emergency light source circuit 300, and the details are as follows:

In an embodiment of the present invention, the emergency light source circuit 300 includes a booster chip U4 and an emergency light string LED2;

The voltage input end of the booster chip U2 is connected to the voltage input end of the emergency light source circuit 300; the signal input end of the booster chip U2 is connected to the signal input end of the emergency light source circuit 300; the output end of the booster chip U4 is connected to the positive electrode of the emergency light string LED2 ; The negative pole of the emergency light string LED2 is grounded.

In this embodiment, the emergency light source circuit 300 includes a tenth capacitor C10 , an eleventh capacitor C11 , a twelfth capacitor C12 , a thirteenth capacitor C13 , a tenth capacitor C13 , and a tenth capacitor C10 in addition to the booster chip U4 and the emergency light string LED2 A resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourth inductor L4 and a fifth diode D5; the light string LED2 includes a light emitting diode light string.

Specifically, the voltage input end of the emergency light source circuit 300 is connected to the first end of the thirteenth capacitor C13 and the first end of the fourth inductor L4; the second end of the fourth inductor L4 is connected to the SW pin of the booster chip U4 and the first end of the fourth inductor L4. The anode of the five diodes D5, the VDD pin of the boost chip U4 is connected to the first end of the twelfth capacitor C12, and the second end of the twelfth capacitor C12 and the second end of the thirteenth capacitor C13 share the ground. The VIN pin of the boost chip U4 is connected to the cathode of the fifth diode D5, the first end of the tenth capacitor C12, the first end of the thirteenth resistor R13 and the first end of the eleventh resistor R11. The CS pin of the boost chip U4 is connected to the second end of the eleventh resistor R11 and the positive electrode of the light string LED2; the negative electrode of the light string LED2 and the second end of the tenth capacitor C10 share the ground. The OVP pin of the boost chip U4 is connected to the second end of the thirteenth resistor R13 and the first end of the twelfth resistor R12. The COMP pin of the boost chip U4 is connected to the first end of the eleventh capacitor C11 , and the second end of the eleventh capacitor C11 and the second end of the twelfth resistor R12 share the ground. The ADJ pin of the boost chip U4 is the signal input end of the emergency light source circuit 300 . The GND terminal of the boost chip U4 is grounded.

Referring to FIG. 7 , a second aspect of the present invention provides a lamp 1, including a lamp module 10 and the above-mentioned lamp emergency module 20, the lamp module 10 and the lamp emergency module 20 are both connected to the mains;

The lamp module 10 is used for receiving commercial power to generate a light source;

The lamp emergency module 20 is used for charging and storing energy according to the received mains power, and generating an emergency light source when the impedance at both ends of the mains neutral wire is less than a threshold value.

In the present embodiment, the lamp module 10 may include various forms of driving components and light strings. When the lamp module 10 and the lamp emergency module 20 are connected to the same mains, it can be realized that the lamp module 10 cannot fail in the event of a mains failure. When working and emitting light, the lamp emergency module 20 automatically detects the abnormality of the commercial power supply and emits light, so as to realize the emergency function.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: The technical solutions recorded in each embodiment are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the various embodiments of the present invention, and are It should be included within the protection scope of the present invention.

Claims (10)

1. A light fixture emergency module, comprising: the emergency power supply circuit, the emergency control circuit and the emergency light source circuit;

the input end of the emergency power supply circuit and the alternating current input impedance detection end of the emergency control circuit are respectively connected with a mains supply; the output end of the emergency power supply circuit is respectively connected with the input end of the emergency control circuit and the voltage input end of the emergency light source circuit; the output end of the emergency control circuit is connected with the signal input end of the emergency light source circuit;

the emergency power supply circuit converts the commercial power into battery voltage and provides the battery voltage for the emergency control circuit and the emergency light source circuit;

the emergency control circuit generates a PWM signal when the alternating current input impedance detection end detects that the impedance of the two ends of the commercial power zero line and the commercial power live line is smaller than a threshold value, and sends the PWM signal to the emergency light source circuit;

and the emergency light source circuit controls the on and off of the emergency light source according to the PWM signal.

2. A lamp emergency module as claimed in claim 1, wherein said emergency supply circuit comprises a constant voltage circuit and a battery management circuit;

the input end of the constant voltage circuit is the input end of the emergency power supply circuit, and the output end of the constant voltage circuit is connected with the input end of the battery management circuit; the output end of the battery management circuit is the output end of the emergency power supply circuit;

the constant voltage circuit converts commercial power into constant voltage and provides the constant voltage for the battery management circuit;

the battery management circuit converts the constant voltage to the battery voltage and provides the battery voltage to the emergency control circuit and the emergency light source circuit.

3. The lamp emergency module of claim 2, wherein the constant voltage circuit comprises a rectifier bridge circuit for converting the commercial power from an ac voltage to a dc voltage, a filter circuit for filtering the dc voltage, and a constant voltage chip circuit for converting the filtered dc voltage to a constant voltage;

a first alternating current input end of the rectifier bridge circuit is connected with the live wire of the commercial power, a second alternating current input end of the rectifier bridge circuit is connected with the zero line of the commercial power, a first direct current output end of the rectifier bridge circuit is connected with the input end of the filter circuit, and a second direct current output end of the rectifier bridge circuit is grounded; the output end of the filter circuit is connected with the input end of the constant voltage chip circuit, and the output end of the constant voltage chip circuit is the output end of the constant voltage circuit.

4. The lamp emergency module of claim 2, wherein the battery management circuit comprises a battery management chip, a battery pack, and a thermistor;

a voltage input pin of the battery management chip is connected with a voltage input end of the battery management circuit; the positive pole of the battery pack is used as the voltage output end of the battery management circuit and is connected with the battery voltage detection pin of the battery management chip, and the negative pole of the battery pack is grounded; the first end of the thermistor is connected with a battery temperature detection input pin of the battery management chip, and the second end of the thermistor is grounded.

5. The lamp emergency module of claim 4, further comprising a first normally closed switch;

the first normally-closed switch is connected in series between the positive electrode of the battery pack and a battery voltage detection pin of the battery management chip.

6. The lamp emergency module of claim 4, wherein the battery management circuit further comprises a charge indicator light;

the charging indicator light is connected between the voltage input pin and the status pin of the battery management chip.

7. The lamp emergency module of claim 1, wherein the ac input impedance detection terminal of the emergency control circuit comprises a first impedance detection terminal and a second impedance detection terminal, the first impedance detection terminal is connected to a neutral line of a utility power, and the second impedance detection terminal is connected to a live line of the utility power;

the emergency control circuit comprises an emergency chip; the emergency chip comprises a zero line detection pin and a live line detection pin;

the zero line detection pin is connected with a first impedance detection end of the emergency control circuit, and the live line detection pin is connected with a second impedance detection end of the emergency control circuit; the voltage input end of the emergency chip is connected with the voltage input end of the emergency control circuit; and an enabling pin of the emergency chip is an output end of the emergency control circuit.

8. The lamp emergency module of claim 7, further comprising a first normally open switch for performing a power outage test;

the first end of the first normally-open switch is connected with the zero line detection pin of the emergency chip, and the second end of the first normally-open switch is connected with the live line detection pin of the emergency chip.

9. The lamp emergency module of claim 1, wherein the emergency light source circuit comprises a boost chip and an emergency light string;

the voltage input end of the boosting chip is connected with the voltage input end of the emergency light source circuit; the signal input end of the boosting chip is connected with the signal input end of the emergency light source circuit; the output end of the boosting chip is connected with the anode of the emergency lamp string; the negative pole of the emergency lamp string is grounded.

10. A luminaire comprising a luminaire module and a luminaire emergency module according to any one of claims 1 to 9, both of said luminaire module and said luminaire emergency module being connected to mains electricity;

the lamp module is used for receiving commercial power to generate a light source;

the lamp emergency module is used for charging and storing energy according to received commercial power and generating an emergency light source when the impedance at two ends of the commercial power zero line and the commercial power zero line is smaller than a threshold value.

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