CN207219118U - A LED circuit with emergency lighting - Google Patents

Abstract

The utility model discloses a kind of band emergency lighting LED circuit, including AC distribution device, monitor, the output end of the AC distribution device connects with the input of AC voltage regulator and charger, the charger output termination battery, the output end and battery of the AC voltage regulator are connected to switching switch, the AC LEDs both ends of built-in constant-current circuit are connected to by switching switch, include LED chip in the AC LEDs of the built-in constant-current circuit, altered in the LED chip and be connected to constant-current control circuit, the constant-current control circuit can make the electric current for flowing through LED chip stable in setting, ensure that LED life-span is unaffected.The design of the AC LEDs of constant-current circuit built in the utility model use, not only reduce LED volume and weight, improve application space, save the cost of rod changer assembly, 15~30% power loss when the also LED of saving over is changed between direct current, alternating current, improve the luminous efficiency of integral LED.

Description

A LED circuit with emergency lighting

technical field

The utility model relates to the technical field of LED circuits, in particular to an LED circuit with emergency lighting.

Background technique

With the development of industrial and commercial lighting, more and more places need uninterrupted lighting, such as subway stations, supermarkets, etc. Not only require power saving, high brightness, and long life, but also must ensure uninterrupted lighting. Currently commonly used incandescent lamps, fluorescent lamps, high-pressure sodium lamps, etc. are powered by the AC grid. Even an optimally designed AC grid will inevitably suffer blackouts. In order to ensure uninterrupted lighting, it is usually necessary to install an emergency lighting power supply.

A traditional uninterruptible power supply consists of rectifiers, batteries and inverters. When the power grid is normally powered, the AC power is converted into DC power by the rectifier to charge the battery. When the grid power supply is interrupted, the battery converts the DC power into AC power through the inverter to supply power to the lighting fixtures. This kind of uninterrupted lighting system is very costly, and at the same time, due to multiple changes, the power consumption is also relatively large.

In recent years, semiconductor lighting (LED) powered by DC power supply has been developed rapidly. This lighting is 90% more energy-saving than incandescent lamps. Under the same power, LED has a luminous intensity that is more than 40% higher than ordinary fluorescent lamps and high-pressure sodium lamps. The life of the lamp can reach 100,000 hours, and the color rendering index can reach more than 80, which is much higher than that of high-pressure sodium lamps.

However, LEDs are driven with DC, and an inverter is necessary to convert the AC input to a DC output. Due to the large size and heavy weight of the converter, it not only increases the cost, but also consumes power conversion, and its life cannot match the life of the LED, which has become a "bottleneck" problem that LED applications need to break through.

Utility model content

The technical problem to be solved by the utility model is to provide a design of an AC LED lamp with a built-in constant current circuit, which not only reduces the volume and weight of the LED, but also improves the application space, saves the cost of the converter assembly, and saves the cost of the LED in the past. 15∼30% power consumption when switching between DC and AC power, this LED circuit with emergency lighting improves the luminous efficiency of the whole LED.

In order to solve the above technical problems, the utility model provides an LED circuit with emergency lighting, including an AC distributor and a monitor, characterized in that the output of the AC distributor is connected to the input of the AC voltage stabilizer and the charger , the output terminal of the charger is connected to the storage battery, the output terminal of the AC voltage stabilizer and the storage battery are connected to the switch, and are connected to both ends of the AC LED lamp of the built-in constant current circuit through the switch, and the AC of the built-in constant current circuit The LED lamp includes an LED chip, and a constant current control circuit is connected to the LED chip. The constant current control circuit can stabilize the current flowing through the LED chip at a specified value, so as to ensure that the life of the LED is not affected.

Further, the monitor is connected with an AC voltage stabilizer, a charger, a storage battery, and a switch.

Further, the monitor is used to monitor various parameters of the AC voltage stabilizer, the charger, the storage battery, and the switching switch, and the monitor can control the AC voltage stabilizer and the charger of the uninterrupted lighting device , battery, switch to implement remote monitoring to ensure reliable work of lighting fixtures.

Furthermore, there are two sets of storage batteries, one set is used as the main set and the other set is standby, and the two sets of storage batteries are replaced by automatic switching or manual switching.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model adopts the AC LED lamp technology which has developed rapidly in recent years; the AC LED lamp does not need a power converter, which not only reduces the volume and weight of the LED, improves the application space, saves the cost of the converter assembly, but also saves In the past, 15∼30% of the power consumption was lost when LEDs switched between DC and AC, which improved the luminous efficiency of the overall LED; The system structure is of great significance; AC LED lamps save 90% of electricity than incandescent lamps, and their luminous intensity is more than 40% higher than that of ordinary fluorescent lamps and high-pressure sodium lamps at the same power, and their lifespan can reach 100,000 hours, and their color rendering index can reach More than 80, much higher than the high pressure sodium lamp.

2. The AC LED lamp of the utility model is connected in series with a constant current control circuit in the LED chip, even if the voltage of the external AC power supply increases or the forward voltage drop of the LED chip decreases, the current flowing through the LED chip can also be stabilized at a specified value , to ensure that the life of the LED is not affected, so that the AC LED lamp can work under the DC input voltage, so the expensive high-power inverter is saved in the emergency lighting power system, and one conversion is reduced, making the system more efficient While the reliability and reliability have been greatly improved, the initial investment of the uninterrupted lighting system has also been greatly saved.

Description of drawings

Fig. 1 is a structural block diagram of the LED circuit of Embodiment 1 provided by the present invention.

Fig. 2 is a structural block diagram of the LED circuit of Embodiment 2 provided by the present invention.

Fig. 3 is a schematic diagram of the circuit structure of the utility model.

In the figure: AC distributor 1, AC voltage stabilizer 2, charger 3, storage battery 4, switch 5, AC LED lamp with built-in constant current circuit 6, monitor 7.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be clearly defined defined.

Embodiment one:

Referring to Fig. 1 and Fig. 3, a LED circuit with emergency lighting includes an AC distributor 1, the output terminal of the AC distributor 1 is connected to the input terminal of the AC voltage stabilizer 2 and the charger 3, and the charging The output terminal of the device 3 is connected to the storage battery 4, the output terminal of the AC voltage stabilizer 2 and the storage battery 4 are connected to the switch 5, and are connected to both ends of the ACLED lamp 6 of the built-in constant current circuit through the switch 5, and the built-in constant current circuit The AC LED lamp 6 includes an LED chip 8, and a constant current control circuit 9 is connected to the LED chip 8. The constant current control circuit 9 can stabilize the current flowing through the LED chip 8 at a specified value to ensure the life of the LED. Not affected.

Embodiment two:

Referring to Figure 2, a LED circuit with emergency lighting includes an AC distributor 1 and a monitor 7, the output of the AC distributor 1 is connected to the input of the AC voltage stabilizer 2 and the charger 3, and the The output terminal of the charger 3 is connected to the storage battery 4, the output terminal of the AC voltage stabilizer 2 and the storage battery 4 are connected to the switch 5, and are connected to both ends of the LED lamp through the switch 5; the monitor 7 is connected to the AC voltage stabilizer 2 , charger 3, battery 4, switch 5 are connected; the monitor 7 is used to monitor various parameters of the AC voltage stabilizer 2, charger 3, battery 4, switch 5, and the monitor 7 is connected through the communication interface , The control center can remotely monitor the AC voltage stabilizer 2, charger 3, battery 4, and switch 5 of the uninterrupted lighting device to ensure that the lighting fixtures work reliably;

AC LED lights, if there is no constant current circuit, when the AC power rises, the current flowing through the LED will increase rapidly, which will seriously affect the life of the LED lamp; when the ambient temperature rises, the forward voltage of the LED chip will If the power supply voltage remains unchanged, the current flowing through the LED chip will increase, which will also affect the life of the LED lamp, so the constant current control circuit is an essential part of the LED lamp;

Referring to Fig. 3, in order to realize the constant current control, the utility model adopts the constant current control circuit 9 connected in series in the LED chip 8, even if the voltage of the external AC power source increases or the forward voltage drop of the LED chip 8 decreases, the LED The current of the chip 8 can also be stabilized at a specified value, ensuring that the lifespan of the LED is not affected.

As shown in Figure 3, resistors R1, R2, transistor V1, and precision adjustable voltage reference U1 (TL431) form a high-precision constant current circuit. The calculation formula is as follows:

Where: Ice is the constant current; Vref is the reference voltage of TL431.

To sum up, the AC LED lamp of the present utility model connects the constant current control circuit 9 in series with the LED chip, even if the voltage of the external AC power supply increases or the forward voltage drop of the LED chip decreases, the current flowing through the LED chip can also be reduced. Stable at the specified value to ensure that the life of the LED is not affected, so that the AC LED lamp can work under the DC input voltage, so the expensive high-power inverter is saved in the emergency lighting power system, and one conversion is reduced , The efficiency and reliability of the system have been greatly improved, and the initial investment of the uninterrupted lighting system has also been greatly saved.

The above are only preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, but any equivalent modification or change made by those of ordinary skill in the art according to the content disclosed in the present utility model, All should be included in the scope of protection described in the claims.

Claims (3)

1. An LED circuit with emergency lighting, including an AC distributor (1) and a monitor (7), characterized in that: the output terminal of the AC distributor (1), an AC voltage stabilizer (2) and a charger The input terminal of (3) is connected, the output terminal of the charger (3) is connected to the battery (4), the output terminal of the AC voltage stabilizer (2) and the battery (4) are connected to the switch (5), and by switching The switch (5) is connected to both ends of the AC LED lamp (6) with a built-in constant current circuit, and the AC LED lamp (6) with a built-in constant current circuit includes an LED chip (8), and the LED chip (8) goes up Connected with a constant current control circuit (9). 2. The LED circuit with emergency lighting according to claim 1, characterized in that: the monitor (7) is connected with the AC voltage stabilizer (2), charger (3), battery (4), switch (5) CONNECTIONS. 3. The LED circuit with emergency lighting according to claim 1, characterized in that: the storage battery (4) is provided with two groups, one group is active, and the other group is standby, and the two groups of storage batteries are automatically switched Or manually switch to replace.