CN201209798Y - LED full automatic synchronization emergency lighting circuit - Google Patents

Abstract

The utility model discloses an LED full automatic synchronization emergency lighting circuit, comprising a lighting power supply, a lighting fitting, an automatic control circuit and a driving circuit, wherein the lighting power supply is connected with the automatic control circuit and the driving circuit, the automatic control circuit is connected with the lighting fitting, the lighting power supply is a DC power supply; the lighting fitting is the LED with high brightness; the automatic control circuit includes a light control circuit composed of a photoconductuive cell and an electric control circuit composed of a AC sample circuit. The light control circuit and the electric control circuit are connected with a control circuit through and a circuit, a trigger circuit and the control circuit. The utility model directly selects the DC power supply of a communication device as the power supply of the emergency light. The power supply is characterized by including: 1. large capacity; 2. convenient maintenance; 3. simple mounting; 4 saved invest devotion, low cost; 5. perfect power supply establishment, strong function; 6. lighting synchronization.

Description

LED automatic synchronous emergency lighting circuit

technical field

The utility model relates to a lighting circuit, in particular to an LED full-automatic synchronous emergency lighting circuit.

Background technique

According to the investigation of the communication equipment room, the emergency lighting of each equipment room is not standardized at present, and can be summarized into two categories.

1. Small and informal: there are miner's lamps, emergency exit lights, and some even use flashlights for emergency lighting. This type of emergency lighting is a very simple lamp with many shortcomings. For example, 1), small capacity: generally 2-4Ah, the backup DC power supply of communication equipment, after the AC power failure, the design use time is generally about 8-10 hours, and the lighting time of this type of lamp is no more than 4 hours 2), inconvenient maintenance: the battery of the emergency light needs to be charged and discharged regularly, otherwise it will affect the service life of the battery, so that the battery must be charged and discharged regularly by a special person, which is labor-intensive and time-consuming; 3) Inconvenient to use: when the AC power fails in the dark, it is necessary to look for lamps in the dark, and when operating the equipment, a special person must hold the lamp for lighting, which is very inconvenient to use.

2. Special emergency lighting: generally large-scale formal emergency lighting equipment. For example, AC backup generator, large-capacity 220-volt DC inverter power supply, etc. This type of power supply device is mainly used for power supply for large-scale communication equipment, important departments and equipment, and is not designed for emergency lighting. It is a dual-purpose power supply equipment, and lighting is only part of it. This kind of equipment is relatively large, complex in structure, high in cost, difficult to popularize, and suitable for centralized emergency lighting.

According to the analysis of the above situation, the emergency lighting of the communication room is currently a weak link, there is a gap in the middle, and there is a lack of a popular special emergency lighting device.

Contents of the invention

The purpose of the utility model is to provide an LED fully automatic synchronous emergency lighting circuit.

In order to achieve the above object, the utility model adopts the following technical solutions:

The utility model includes a lighting power supply, a lighting lamp, an automatic control circuit and a driving circuit. The above-mentioned lighting power supply is connected with the automatic control circuit and the driving circuit, and the automatic control circuit is connected with the lighting lamp. The above-mentioned lighting power supply adopts a DC power supply; the lighting lamp is High-brightness light-emitting diode; the above-mentioned automatic control circuit includes a light control circuit composed of photosensitive elements and an electric control circuit composed of an AC sampling circuit. The light control circuit and the electric control circuit are connected to the control circuit through an AND gate circuit and a trigger circuit.

The above driving circuit is a linear constant voltage driving circuit.

The above-mentioned drive circuit is a high-frequency switch type constant voltage drive circuit.

A current-limiting protection circuit is provided between the above-mentioned driving circuit and the lighting fixture.

The utility model adopting the above-mentioned technical solution directly selects the DC power supply of the communication equipment as the power supply of the emergency light. This power supply has the following characteristics: 1. The capacity is very large, for a 4A load, the capacity of the storage battery is about 200Ah; 2. The maintenance is very convenient, and there are personnel in the power supply team to carry out regular maintenance on the communication power supply; 3. The installation is simple and convenient. Since the power supply room is close to the machine room, the wiring installation is more convenient; 4. There is no need to add additional power supply equipment, which saves this part of capital investment, and the cost is very low; When designing the load current, several loads can be carried at the same time, each of which has a dedicated protection device; 6. It can realize synchronous lighting. Because the current of the lighting device is small and the capacity of the DC power supply is large, it can always follow the equipment For lighting. In addition, the utility model chooses the ultra-high-brightness light-emitting diode with the smallest power consumption as the light source, and its characteristics have the following points: 1. High efficiency and low power consumption. Compared under the same illuminance, its luminous efficiency is the highest. Minimum power consumption; 2. Long life. Under normal use, the life of high-power LED tubes can reach 5,000 hours, and the life of low-power LED tubes is longer; 3. The cost is relatively low, and the cost itself is not high. Coupled with the long life, therefore, the chances of replacement are less. The addition of the automatic control circuit greatly facilitates the work of the maintenance personnel and avoids the confusion when the power is cut off in the dark. Some over-current protection measures have been taken in the circuit, such as fuses are installed on the circuit, and current-limiting protection circuits are set in the circuit. Once the lighting group has a short circuit, or the current is too large for some reason, the protection circuit will Automatically turns off the power to the light group.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is the circuit diagram of embodiment 1 in the utility model;

Fig. 3 is the circuit diagram of embodiment 2 in the utility model.

Detailed ways

Example 1

As shown in Figure 1, the utility model includes a lighting power supply, a lighting lamp, an automatic control circuit and a driving circuit. The above-mentioned lighting power supply is connected with the automatic control circuit and the driving circuit, and the automatic control circuit is connected with the lighting lamp. DC power supply for communication equipment; lighting fixtures are ultra-high-brightness light-emitting diodes with minimal power consumption. The drive circuit is a linear constant voltage drive circuit. A current-limiting protection circuit is provided between the drive circuit and the lighting fixture, and the current-limiting protection circuit is a technology well known to those skilled in the art.

As shown in Figure 2, the above-mentioned automatic control circuit includes a light control circuit composed of photosensitive elements and an electric control circuit composed of an AC sampling circuit. circuit is connected. In addition, the DC power supply is connected to the light control circuit through a 12V voltage stabilizing circuit.

The above-mentioned light control circuit is mainly composed of a photosensitive diode D1, and the photosensitive diode D1 is "ANDed" with the signal output by the electric control circuit after being amplified by the second triode BG2. The electric control circuit performs AC sampling, rectification and filtering by the rectification circuit A, and then “ANDs” with the signal of the light control circuit. The above-mentioned 12V voltage regulator circuit is composed of a 7812 three-terminal voltage regulator integrated circuit. In order to reduce the cost, a 12V voltage regulator tube can be directly used to achieve the purpose. The inspection circuit is mainly composed of an inspection switch K. The control circuit uses chip 4011. In this embodiment, the driving circuit is a linear constant voltage driving circuit. The 7824 chip is used in the drive circuit, and its output voltage is 24V. With the 15V regulator D, the total output voltage can reach 39V ~ 40V. At the same time, since the 7824 chip only has three terminals of input, output and ground, and has no control terminal, a triode BG1 is added as an electronic switch. It works in the on and off state, and is usually in the off state. At this time, there is no current flow, it consumes essentially no power. When lighting is required, the control signal turns it on, and there is current flowing at this time, but the voltage drop between its collector and emitter is very small, and the power consumption is also very small, so the triode BG1 only needs to use Just one power tube.

Working process and principle of the present utility model are as follows:

①. During the day, when there is no AC power failure. Both the light control circuit and the electric control circuit output two negative signals, and the AND gate also outputs negative signals. After the inspection circuit reaches the trigger circuit, the trigger circuit sends a positive signal to the control circuit, and the control circuit locks the drive circuit. The drive has no voltage output, and the lighting not bright.

②, During the daytime, AC power failure. At this time, the output of the light control circuit is negative, the output of the electric control circuit is positive, and the output of the AND gate circuit is negative. The following process is the same as ①.

③. It was dark and the AC was not powered off. The output of the light control circuit is positive, the output of the electric control circuit is negative, and the output of the AND gate circuit is negative. The following process is the same as ①.

④, dark day, AC power failure. At this time, the light control circuit and the electric control circuit output two positive signals, and the AND gate circuit also outputs positive signals. After the inspection circuit is sent to the trigger circuit, the trigger circuit outputs a negative signal to the control circuit. The control circuit releases the blocking of the drive circuit, and the driver There is a voltage output, and the lights are turned on, which realizes the purpose of automatically turning on the emergency lights when it is dark or the light is insufficient, and the AC power is cut off.

Example 2

As shown in Figure 1, the utility model includes a lighting power supply, a lighting lamp, an automatic control circuit and a driving circuit. The above-mentioned lighting power supply is connected with the automatic control circuit and the driving circuit, and the automatic control circuit is connected with the lighting lamp. DC power supply for communication equipment; lighting fixtures are ultra-high-brightness light-emitting diodes with minimal power consumption. The drive circuit is a high-frequency switch type constant voltage drive circuit. A current limiting protection circuit is provided between the driving circuit and the lighting fixture.

As shown in Figure 3, the drive circuit is a high-frequency switch type constant voltage drive circuit. High-frequency switch drive circuit, high efficiency, wide adaptable range of input voltage. At present, the high-frequency switching drive circuit has been integrated and modularized, and the stability of the circuit has been greatly improved. There are also special drive modules for LEDs with various specifications, which can be developed as a series of products of the utility model. The high frequency switch type constant voltage driving circuit is well known to those skilled in the art.

Other technical characteristics and work process are identical with embodiment 1.

Claims (4)

1, the full-automatic emergency lighting circuit synchronously of a kind of LED, it comprises mains lighting supply, lighting, automatic control circuit and drive circuit, described mains lighting supply links to each other with drive circuit with automatic control circuit, automatic control circuit is connected with lighting, it is characterized in that: described mains lighting supply adopts dc source; Lighting is a high brightness LED; Described automatic control circuit comprise the light-operated circuit formed by light-sensitive element with by exchanging the electrical control circuit that sample circuit is formed, light-operated circuit is connected with control circuit by AND circuit, circuits for triggering with electrical control circuit.

2, the full-automatic emergency lighting circuit synchronously of LED according to claim 1, it is characterized in that: described drive circuit is linear constant voltage drive circuit.

3, the full-automatic emergency lighting circuit synchronously of LED according to claim 1, it is characterized in that: described drive circuit is a HF switch type constant voltage drive circuit.

4, according to claim 1 or the full-automatic emergency lighting circuit synchronously of 2 or 3 described LED, it is characterized in that: between described drive circuit and lighting, be provided with current-limiting protection circuit.

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