JPS6132394A - Emergency illuminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to emergency lighting equipment including guide lights, etc., and in particular to emergency lighting equipment with a built-in battery that keeps the lamp lit in the event of a power outage due to an emergency such as a fire outbreak. Regarding lighting equipment.

During normal times, the lamps are powered by a commercial AC power supply, and in the event of a power outage when the commercial AC power supply is cut off due to an earthquake or fire, emergency lighting equipment that uses a dedicated power supply to keep the lamps lit is an emergency lighting device. Widely used as lights and guide lights in places where large animals gather.

This emergency lighting equipment generally has a built-in battery that uses a rechargeable secondary battery as a dedicated power source for emergencies.The secondary battery is charged with the rectified voltage of the commercial AC power supply during normal times, and is used as a dedicated power source in case of an emergency. If there is a power outage, the lamp will continue to be lit by power supplied from the secondary battery. The lamp then remains lit for a period of time determined by the capacity of the secondary battery. In the event of an emergency, lamps must be lit at a certain level of brightness and for a certain period of time (20 minutes for guide lights and 30 minutes for emergency lights in Japan).

o < ° Hiroshi Ruguchi By the way, the lamp lighting circuit for emergency lighting equipment with a built-in battery consists of a normal lighting circuit that lights the lamp using a commercial AC power source, and a charging circuit that charges the secondary battery during normal times. and an emergency lighting circuit that uses the rechargeable battery's charge to keep the lamp on in an emergency.If the power goes out in an emergency, the lamp will stay on for a predetermined amount of time (30 minutes) at a certain level of illuminance. It is desirable for the lamp to be turned on in such an emergency with higher illuminance and to last for a longer period of time, and this requirement can be easily achieved by using a high-capacity secondary battery. However, as the capacity of secondary batteries increases, they become larger, have larger ff1ffi, and become more expensive, making them impractical.There is a natural limit to the battery capacity, and the lamp lighting in an emergency is determined by the battery capacity. It is difficult to increase both the illumination intensity and the lighting duration, and if the illuminance is increased, the lighting duration will be shortened, and in the event of a long power outage, the emergency lamp will turn off in the middle of the power outage, which is inconvenient. If the duration was increased, the illuminance would naturally have to be lowered, which caused problems such as inconvenience for people evacuating using the light of emergency lamps.

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The present invention has been made in view of the above-mentioned problems of emergency lighting equipment with a built-in battery.The technical means of the present invention to solve this problem is to turn on the emergency lighting equipment with a built-in battery that operates in the event of an AC power outage. The circuit is equipped with an automatic dimming means that switches the illuminance of the lamp into multiple stages divided by a predetermined lighting time.

By installing the above-mentioned automatic dimming means, the illumination intensity is gradually lowered when the lamp is turned on during an AC power outage, and the consumption rate of the charging energy of the built-in battery is gradually slowed down, resulting in the lamp being turned on. The duration can be increased. In addition, automatic light control is possible, such as turning on the lamp at high illuminance for a short period of 5 to 10 minutes after the occurrence of an emergency, and then turning on the lamp at lower illuminance afterwards. It is possible to facilitate the evacuation and guidance of people within a short period of time.

A basic embodiment of the present invention will be described below with reference to FIG. 1, and a specific embodiment will be described below with reference to FIG. 2.

In Figure 1, (1) is a commercial AC power supply, (2) is an emergency lighting equipment lamp such as a discharge lamp such as a fluorescent lamp, and (3) is a discharge lamp such as a fluorescent lamp.
) is a normal lighting circuit that lights a discharge lamp (2) using a commercial AC power source (1) under normal conditions, and (4) is a commercial AC power source (1).
A secondary battery such as a sealed cylindrical nickel-cadmium battery is charged under normal conditions.Charging is performed using a full-wave rectified DC voltage that steps down the AC from the commercial AC power supply (1) using a step-down full-wave rectifier (5). be exposed. (6) is a discharge lamp (
2) is an emergency lighting circuit that lights up in an emergency; (7) is a normally closed switch (opens when the relay is energized) connected in series between the secondary battery (4) and the emergency lighting circuit (6); )
is a relay connected in parallel to the commercial AC power source (1), and its contacts connect the discharge lamp (2) to the lighting circuit in normal times and in an emergency as appropriate. In an emergency when the supply of commercial AC power (1) is cut off, the contacts are closed, the discharge lamp (2) is connected to the emergency lighting circuit, and the switch (7) is closed.

The above may be a lighting circuit of a normal emergency lighting equipment, and the feature of the present invention is that the emergency lighting circuit (6) has the following automatic dimming means (9).
).

The automatic light opening means (9) is activated from the time an emergency situation occurs and automatically switches the illumination intensity of the discharge lamp (2) during emergency lighting into multiple stages separated by a predetermined lighting time, and the illuminance of the emergency lighting The switching is performed by, for example, increasing or decreasing the lamp current, depending on the lighting method of the emergency lighting circuit (6).
Further, the time 11 control for illuminance switching is performed by a timer circuit using a CR time constant. This automatic light opening means (9) has an emergency lighting duration of about 30 minutes or more for general emergency lighting equipment, and the time required for people to evacuate after the occurrence of an emergency is mainly about the first 10 minutes. Therefore, a two-step dimming method in which the discharge lamp (2) is turned on at the highest illuminance for 10 minutes from the time of the occurrence of an emergency, and after 10 minutes, the illuminance is lowered to the minimum necessary and maintained, or Practically effective is a structure that performs dimming in three or more stages, in which the illuminance is gradually reduced to the necessary minimum level after 10 minutes have elapsed.

Next, a specific circuit example of the emergency lighting circuit (6) and the automatic light control means (9) is shown in FIG. 2 and will be described below.

When the DC voltage of the secondary battery (4) is input through the choke (10), the emergency lighting circuit (6) converts it to several tens of kiloliters.
It has a high frequency lighting circuit (11) that converts into a high frequency of z or more and applies it to the discharge lamp (2) to light it. The high frequency lighting circuit (11) has two transistors T'r1 and Tr2 connected in a bush-pull manner to the primary side of an oscillation transformer T, and when DC voltage from a secondary battery (4) is applied, the two transistors T'
r1 and Tr2 are alternately turned on and off, a high frequency voltage is generated on the secondary side of the oscillation transformer T, and the discharge lamp (2) is lit at high frequency.

The automatic dimming means (9) performs two-step dimming in which, in an emergency, the discharge lamp (2) is first lit with a high illumination intensity and then lit with a low illuminance. It is composed of two dimming capacitors C1 and C2. The dimming capacitors C1 and C2 are connected in parallel via a normally closed relay contact (13), and the two are connected in series to one circuit line between the secondary side of the oscillation transformer 1 and the discharge lamp (2). . The timer circuit (12) operates when the switch (7) is closed and the DC voltage of the secondary battery (4) is applied, and opens the relay contact (13) after a certain period of time. no t
Used in timer circuits using JJTs (unijunction transistors).

This timer circuit (12) uses a CR time constant, and when the DC voltage of the secondary battery (4) is applied, capacitor C3 starts charging via variable resistor R, and for a time set by variable resistor R. The terminal voltage of capacitor C3 is suitable for the peak point voltage of unijuction transistor UJT, and unijuction transistor UJT becomes conductive. Then, capacitor C3 is discharged, and accordingly, Cyrisk SCR becomes conductive, relay coil py is activated, and relay contact (13)
opens, the relay coil RY is self-retained and continues to open the relay contact (13) until the secondary battery (4) is discharged,
After that, the timer circuit (12) self-returns to its original state,
Relay contact (13) closes.

Assuming that the design time of the timer circuit (12) is 10 minutes,
The automatic light control means (9) performs the following operations.

First, an emergency occurs and the power goes out, and at the same time the switch (7) closes, the timer circuit (12) operates, and the relay coil py does not operate for the first 10 minutes, so the relay contact (
13) is in a closed state, and the discharge lamp (2) is maintained lit at an illuminance determined by the parallel capacitance of the two dimming capacitors C', , C2. Then, 10 minutes after the occurrence of the emergency, the relay coil R31 is activated and the relay contact (13) opens, and the discharge lamp (2) has an illuminance determined by the capacity of one opening capacitor C2, that is, the illuminance decreases by one rank due to the capacity reduction. The discharge lamp (2) continues to be lit. FIG. 3 shows the relationship between lighting time and illuminance of such a discharge lamp (2).

If you set the illuminance of the emergency lighting mentioned above to a value sufficient for people to evacuate for 10 minutes, and then set it to the minimum value determined by law after 10 minutes, the secondary battery (4) It is possible to provide an emergency lighting device that can light up the lamp in an emergency for a long time without increasing the capacity of the lamp, or by only increasing it slightly.

When the discharge lamp (2) is dimmed in three or more stages using the automatic dimming means (9), this can be easily achieved by using three or more dimming capacitors in parallel, two or more timer circuits in parallel, etc. be done.

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According to the present invention, it is possible to lengthen the duration of lamp lighting in an emergency without increasing the capacity of the secondary battery too much, and the illuminance of the lamp in an emergency can be initially set high and then lowered step by step. It becomes possible to select effective lighting after an emergency occurs, and it can be seen at a glance that the lamp is about to go off due to emergency dimming, which has practical value that can be very effective at the scene of an emergency ( We can provide emergency lighting equipment.

[Brief explanation of drawings]

Fig. 1 is a basic circuit diagram showing an embodiment of the present invention, Fig. 2 is a specific circuit diagram of the main part of Fig. 1, and Fig. 3 is an emergency lamp lighting time using the circuit of Fig. 2. It is a graph diagram showing the relationship between illuminance. (2) -Lamp [discharge lamp], (4) -Battery, (6)
-Emergency lighting circuit, (9).-Automatic dimming means. Patent applicant: NEC Home Electronics Co., Ltd. Agent: Gangwon Province
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Figure 43

Claims (1)

[Claims] (1) Emergency lighting characterized by having a lighting circuit that keeps the lamp lit using a built-in battery in the event of an AC power outage, and an automatic dimming means that switches the lamp's illuminance to multiple levels divided by a predetermined lighting time. utensils.