CN107543094A - A kind of LED lamp with function of emergency illumination - Google Patents

Abstract

The invention discloses an LED lamp with an emergency lighting function, comprising a lamp housing, a battery, a driving power supply, a first LED lamp group and a second LED lamp group, a first LED lamp group and a second LED lamp group are arranged in the lamp housing Each group includes a plurality of LED lamps, and the plurality of LED lamps of the second LED lamp group are connected in parallel; the first LED lamp group is connected to a driving power supply, and the driving power supply is connected to the mains; there is one battery, and the battery is connected to the second LED lamp A control circuit is arranged in the lamp housing, and when the mains power is cut off, the control battery supplies power for the second LED lamp group. The first LED lamp group is powered by the mains for normal lighting, and the multiple LED lamps of the second LED lamp group are connected in parallel, and are directly powered by a single battery when the mains power is cut off, so as to function as emergency lighting. Reasonable and complete utilization of battery power is more energy-saving and environmentally friendly, and the circuit structure is simple.

Description

A LED lamp with emergency lighting function

technical field

The invention relates to an LED lamp, in particular to an LED lamp with an emergency lighting function.

Background technique

LED lamps are widely used for work, study and living lighting because of their energy saving, environmental protection and excellent light source quality. Most of the LED lamps in the prior art, especially LED fluorescent lamps (or LED tubes), generally do not have the function of emergency lighting. For sudden power outages in the power grid, generally, a matching generator is used to generate power, or another Install emergency lighting equipment to solve the problem of temporary lighting. At present, there are also a small number of LED lamps with emergency lighting functions. Specifically, the battery is used to supply power to multiple LED lamps of LED lamps when the mains power is out. This certainly solves the emergency lighting problem of LED lamps, but there are also the following shortcomings : The storage battery is large in size, heavy in weight, and takes up a lot of space, so it cannot be installed in the LED lamp. Multiple LED lamps of LED lamps generally adopt the form of series connection, which requires 12V voltage. The batteries are connected in series for power supply, which will consume power, which is not conducive to energy saving. When the batteries are connected in series for charging, the batteries are easily damaged due to the inconsistent charging process of each battery. Once one of the batteries is damaged, the entire set of batteries will not be able to supply power normally. , In addition, the LED lamps of the existing LED lamps are connected in series. Once one of the LED lamps is damaged, the lamp will not be able to illuminate normally; if a single battery with a lower rated voltage is used, the output voltage of the battery needs to be boosted. Processing, and this will introduce more electronic components, not only the circuit structure is more complex, but also not conducive to energy saving.

Contents of the invention

The present invention provides an LED lamp with emergency lighting function, which overcomes the shortcomings of the LED lamp with emergency lighting function described in the background art.

The technical solution adopted by the present invention to solve the technical problem is: an LED lamp with emergency lighting function, including a lamp housing, a battery, a driving power supply, a first LED lamp group and a second LED lamp group are arranged in the lamp housing, and the second LED lamp group Both the first LED lamp group and the second LED lamp group include a plurality of LED lamps, and the plurality of LED lamps of the second LED lamp group are connected in parallel; the first LED lamp group is connected to a driving power supply, and the driving power supply is connected to the mains; One, the battery is connected to the second LED lamp group, and a control circuit is arranged in the lamp housing. When the mains power is cut off, the control battery supplies power to the second LED lamp group.

Further, the control circuit includes an automatic switch, the automatic switch is connected to the electric circuit between the battery and the second LED lamp group, and the electric input end of the automatic switch is connected to the mains or the driving power supply, when the mains is off When the power is on, the automatic switching switch connects the electric circuit between the battery and the second LED lamp group, and when the mains power is on, the automatic switching switch disconnects the electric circuit between the battery and the second LED lamp group.

Further, the battery is a rechargeable battery, and the control circuit further includes a charging circuit, which is connected to the battery and the mains, and controls charging of the battery when the mains is energized through the charging circuit.

Further, the automatic transfer switch is a triode switch circuit or a relay switch.

Further, the triode switch circuit includes a PNP type triode and a capacitor, the base of the triode is connected to the live line of the mains through at least one diode and at least one resistor, the emitter of the triode is connected to the positive pole of the battery, and the collector of the triode is grounded through the capacitor; The negative pole of the battery is grounded, the positive poles of the LED lamps in the second LED lamp group are respectively connected to the positive poles of the battery, and the negative poles of the LED lamps in the second LED lamp group are respectively connected to the collectors of the triode.

Further, the control circuit also includes a current stabilizer, the ground terminal of the current stabilizer is grounded, the power supply terminal is connected to the positive pole of the battery through the automatic transfer switch, and the output terminal is connected to each LED of the second LED lamp group. negative terminal of the lamp.

Further, a plurality of LED lamps of the first LED lamp group are connected in series, and/or, the battery is a lithium battery or a nickel-metal hydride battery.

Further, the lamp housing includes a lamp tube and lamp caps assembled at both ends of the lamp tube, and the first LED lamp group and the second LED lamp group are installed on a strip-shaped substrate.

Further, the lamp tube includes a lamp holder and a lampshade, the lamp holder includes a mounting plate and a semicircular tube shell, the mounting plate is fixed inside the tube shell, and an accommodating cavity is formed between the two, the battery, the drive The power supply and the control circuit are arranged in the accommodating cavity, and the base plate is fixed on the mounting plate; the shape of the lampshade is adapted to the tube shell, and the two are connected and matched.

Further, the first LED lamp group and the second LED lamp group are arranged in at least one row along the length direction of the substrate, and in the same row, the LED lamps of the first LED group and the LED lamps of the second LED lamp group are arranged crosswise or, the first LED lamp group and the second LED lamp group are respectively arranged in at least one row along the length direction of the substrate.

Compared with the prior art, the present invention has the following beneficial effects:

1. It includes the first LED light group and the second LED light group. The first LED light group is powered by the mains for normal lighting. The multiple LED lights of the second LED light group are connected in parallel. A single battery with a lower rated voltage can directly supply power to play the function of emergency lighting. It can make reasonable and complete use of the power of the battery, which is more energy-saving and environmentally friendly, and the circuit structure is simple; the battery is one, which can be built into the lamp, and There is no problem of being easily damaged by series charging; the multiple LED lamps of the second LED lamp group are connected in parallel, once one or a small part of the LED lamps is damaged, the working status of the remaining LED lamps will not be affected, so that the second LED lamp group can still Provide emergency lighting.

2. The control circuit includes an automatic switching switch, which can quickly switch to the battery to supply power to the second LED light group when the mains power is cut off, so as to realize automatic management.

3. The lamp housing includes a lamp tube and lamp holders assembled at both ends of the lamp tube, so that the LED lamp constitutes an LED lamp tube, which fills the gap that the existing LED lamp tubes generally do not have emergency lighting.

4. The first LED lamp group and the second LED lamp group are arranged in at least one row along the length direction of the substrate, and in the same row, the LED lamps of the first LED lamp group and the LED lamps of the second LED lamp group are arranged crosswise, or, The first LED lamp group and the second LED lamp group are respectively arranged in at least one row along the length direction of the substrate, so that the LED lamps have the same lighting effect when performing normal lighting and emergency lighting, which can meet normal use.

The present invention will be further described in detail below with reference to the drawings and embodiments; however, the LED lamp with emergency lighting function of the present invention is not limited to the embodiments.

Description of drawings

Fig. 1 is the exploded schematic view of the present invention;

Fig. 2 is a circuit principle block diagram of the present invention;

Fig. 3 is a schematic diagram of the circuit connection of the present invention.

detailed description

For the embodiment, please refer to Fig. 1-Fig. 3, an LED lamp with emergency lighting function according to the present invention includes a lamp housing, a battery 3, a driving power supply 4, a first LED lamp group 5, a second LED lamp group6. The lamp housing includes a lamp tube 1 and lamp caps 2 assembled at both ends of the lamp tube 1, so that the LED lamp constitutes an LED lamp tube. The first LED lamp group 5 and the second LED lamp group 6 are installed on the same elongated substrate 7, the first LED lamp group 5 and the second LED lamp group 6 both include a plurality of LED lamps, and the first LED lamp group 5 A plurality of LED lamps of the second LED lamp group 6 are connected in series one by one, and a plurality of LED lamps of the second LED lamp group 6 are connected in parallel. The first LED lamp group 5 is connected to the driving power 4 , and the driving power 4 is connected to the mains 10 . There is one battery 3 , and a lithium battery (or a nickel metal hydride battery) with a rated voltage of DC3.7V is used. The battery 3 is connected to the second LED lamp group 6 . A control circuit is arranged inside the lamp housing, and the battery 3 is controlled to supply power to the second LED lamp group 6 when the mains power is cut off.

In this embodiment, the control circuit includes an automatic switch 8, which is connected to the electric circuit between the battery 3 and the second LED lamp group 6, and the electric input end of the automatic switch 8 is connected to the mains 10 , when the commercial power 10 is powered off, the automatic switch 8 connects the electric circuit between the battery 3 and the second LED lamp group 6, and when the commercial power 10 is powered on, the automatic switch 8 disconnects the battery 3 and the second LED lamp group 6 electrical circuit.

In this embodiment, the battery 3 is a rechargeable battery, the control circuit also includes a charging circuit 9, the charging circuit 9 is connected to the battery 3 and the mains 10, and the charging circuit 9 is used to control the charging circuit 9 when the mains 10 is powered on. The battery 3 is charged. As shown in Figure 3, the charging circuit 9 specifically includes a rectification and filtering circuit (including MB6S chip U4 and capacitor C6), a power drive circuit (the core component is the power driver U3 of LNK306DNDN), a battery charging circuit (the core component is the battery of TP4056 Charger U2, connected with charging indicator light and full indicator light, the colors of the two indicator lights are different), the input of the rectification filter circuit is connected to the mains 10, the output is connected to the input of the power drive circuit, and the output of the power drive circuit is connected to the battery 3 (in FIG. 3, the component indicated by the symbol E is the battery 3, and the chip U1 is the driving power 4 of the first LED lamp group 5). When the mains 10 is powered on and the battery 3 is low, the charging circuit 9 controls the battery 3 to charge, and controls the battery 3 to stop charging when the battery 3 is fully charged, so as to avoid the battery 3 from being overcharged.

In this embodiment, the automatic transfer switch 8 is a triode switch circuit. As shown in Figure 3, the triode switch circuit includes a PNP type transistor Q1 and a capacitor C8, the base of the triode Q1 is connected to the live wire of the mains 10 through diodes D3, D6 and resistor R14, and the emitter of the triode Q1 is connected to the positive pole of the battery 3 , the collector of the transistor Q1 is grounded through the capacitor C8. The negative pole of the battery 3 is grounded, the positive poles of the LED lamps in the second LED lamp group 6 are respectively connected to the positive poles of the battery 3, and the negative poles of the LED lamps in the second LED lamp group 6 are respectively connected to the collector of the triode Q1.

In this embodiment, the control circuit also includes a current regulator U4 (the model of the current regulator is AMC7135), the ground terminal of the current regulator U4 is grounded, the power supply terminal is connected to the collector of the triode Q1, and the output terminal is connected to The negative electrode of each LED lamp of the second LED lamp group 6 . The setting of the current stabilizer U4 can prevent the LED lamps of the second LED lamp group 6 from being burned out due to excessive current at the moment of power-on.

In this embodiment, the lamp tube 1 includes a lamp holder made of metal and a lampshade 13, the lamp holder includes an integrally formed elongated mounting plate 11 and a semicircular tube shell 12, the mounting plate 11 is fixed inside the tube shell 12, An accommodating cavity is formed between the two, and the battery 3, the driving power supply 4, the automatic switch 8, the charging circuit 9 and the current stabilizer U4 are arranged in the accommodating cavity, and the substrate 7 is fixed on the mounting plate 11 ; The shape of the lampshade 13 is adapted to the tube shell 12, and the two snap fit.

In this embodiment, the first LED lamp group 5 and the second LED lamp group 6 are arranged in a row along the length direction of the substrate 7, and the LED lamps of the first LED group intersect with the LED lamps of the second LED lamp group 6 arrangement.

In this embodiment, the automatic transfer switch 8, the charging circuit 9, and the current regulator U4 can be integrated on the same circuit board.

When the mains 10 is normally powered, the driving power supply 4 converts the 220V, 50Hz mains 10 into 20-80V direct current to supply the first LED lamp group 5 to work, so that each LED lamp of the first LED lamp group 5 can be illuminated. At the same time, the transistor Q1 is cut off, so that the battery 3 does not supply power to the second LED lamp group 6 , the charging circuit 9 controls the battery 3 to charge, and automatically stops charging after the battery 3 is fully charged. When the mains 10 suddenly fails, the triode Q1 is turned on, and immediately switches to the battery 3 emergency power supply mode, and the battery 3 supplies power to the second LED lamp group 6 to maintain lighting. When the mains 10 resumes power supply, the automatic transfer switch 8 is switched on its own again, returning to the normal power supply mode of the first LED lamp group 5 by the mains 10, and the charging circuit 9 charges the battery 3 again for backup.

A plurality of LED lamps of the second LED lamp group 6 of the present invention are connected in parallel, and are directly powered by a single battery 3 with a lower rated voltage when the mains 10 is powered off. Reasonable and complete utilization, more energy saving and environmental protection, and simple circuit structure.

In other embodiments, the automatic transfer switch is a relay switch, the relay switch is a normally closed or conversion relay, its two coil input terminals are connected to the mains 10, and its contact group is connected between the battery and the second LED lamp group. in the electrical circuit.

In other embodiments, the lamp housing is a lamp housing of an LED downlight, so that the LED lamp constitutes an LED downlight. In addition, the lamp housing can also have other structures, so that the LED lamp can constitute other types of lamps.

In other embodiments, the first LED lamp group and the second LED lamp group are respectively arranged in at least one row along the length direction of the substrate.

In other embodiments, the electrical input end of the automatic transfer switch is connected to a driving power source.

The above embodiments are only used to further illustrate a LED lamp with emergency lighting function of the present invention, but the present invention is not limited to the embodiments, and any simple modification or equivalent change made to the above embodiments according to the technical essence of the present invention and modifications all fall within the scope of protection of the technical solution of the present invention.

Claims (10)

1. A kind of LED lamp with emergency lighting function, it is characterized in that: comprise lamp housing, battery, driving power supply, first LED lamp group and second LED lamp group are arranged in this lamp housing, the first LED lamp group and the second LED lamp group The LED lamp groups all include a plurality of LED lamps, and the plurality of LED lamps of the second LED lamp group are connected in parallel; the first LED lamp group is connected to a driving power supply, and the driving power supply is connected to the mains; there is one battery, and the battery is connected to the second LED lamp group. For the LED lamp group, a control circuit is arranged inside the lamp housing, and when the mains power is cut off, the control battery supplies power for the second LED lamp group. 2. The LED lamp with emergency lighting function according to claim 1, characterized in that: the control circuit includes an automatic switch, the automatic switch is connected in the electrical circuit between the battery and the second LED lamp group, and the The electrical input end of the automatic transfer switch is connected to the mains or the driving power supply. When the mains power is cut off, the automatic transfer switch connects the electrical circuit between the battery and the second LED lamp group. When the mains power is turned on, the automatic transfer switch disconnects the battery from the The electrical circuit of the second LED light group. 3. The LED lamp with emergency lighting function according to claim 2, characterized in that: the battery is a rechargeable battery, the control circuit also includes a charging circuit, the charging circuit is connected to the battery and the mains, through The charging circuit controls battery charging when mains power is applied. 4. The LED lamp with emergency lighting function according to claim 2, characterized in that: the automatic switching switch is a triode switching circuit or a relay switch. 5. The LED lamp with emergency lighting function according to claim 4, characterized in that: the triode switch circuit includes a PNP type triode and a capacitor, the base of the triode is connected to the live wire of the mains through at least one diode and at least one resistor , the emitter of the triode is connected to the positive pole of the battery, the collector of the triode is grounded through the capacitor; the negative pole of the battery is grounded, the positive poles of the LED lights of the second LED light group are respectively connected to the positive pole of the battery, and the LED lights of the second LED light group are respectively connected to the positive pole of the battery. The negative poles are respectively connected to the collectors of the triode. 6. The LED lamp with emergency lighting function according to claim 2, 4 or 5, characterized in that: the control circuit also includes a current stabilizer, the ground terminal of the current stabilizer is grounded, and the power supply terminal passes through the automatic The switch is connected to the positive pole of the battery, and the output end is connected to the negative poles of the LED lamps of the second LED lamp group. 7. The LED lamp with emergency lighting function according to claim 1, 2 or 3, characterized in that: a plurality of LED lamps of the first LED lamp group are connected in series, and/or, the battery is Lithium battery or NiMH battery. 8. The LED lamp with emergency lighting function according to claim 1, characterized in that: the lamp housing includes a lamp tube and lamp caps assembled at both ends of the lamp tube, the first LED lamp group and the second LED lamp group mounted on a strip substrate. 9. The LED lamp with emergency lighting function according to claim 8, wherein the lamp tube includes a lamp holder and a lampshade, the lamp holder includes a mounting plate and a semicircular tube shell, and the mounting plate is fixed inside the tube shell , and an accommodating cavity is formed between the two, the battery, the driving power supply and the control circuit are arranged in the accommodating cavity, the substrate is fixed on the mounting plate; the shape of the lampshade is adapted to the shell, and the two are connected Cooperate. 10. The LED lamp with emergency lighting function according to claim 8, characterized in that: the first LED lamp group and the second LED lamp group are arranged in at least one row along the length direction of the substrate, and in the same row, The LED lamps of the first LED group and the LED lamps of the second LED lamp group are arranged crosswise; or, the first LED lamp group and the second LED lamp group are respectively arranged in at least one row along the length direction of the substrate.