JPS5857795B2 - Dimming evacuation guide light - Google Patents

Description

[Detailed Description of the Invention] When smoke occurs indoors due to a fire, etc., the blinking time interval of the guide light is changed depending on the concentration of the smoke, that is, the visible dust of the guide light, thereby making it safer. This invention also relates to guide lights that are devised so that evacuation can be carried out quickly and in a timely manner.

2. Description of the Related Art Conventionally, there is a guiding light shown in FIG. 1, which is installed in a building and used to indicate a safe evacuation direction in an emergency.

That is, the front surface of the illustrated case 1 of the guide light is formed of a white acrylic board 2, and the words "arrow" 3 and "emergency exit" 4 are displayed on this acrylic board.

The electric circuit diagram of the guide light is shown in Figure 2.
The power supplied from the AC power supply 5 is supplied to the ballast 6 and the switching unit I.
A fluorescent lamp light source 11 is turned on via the light source 9.

At the same time, an internal power source 8 such as a storage battery is charged through the charger section 7.

If an emergency such as a fire occurs in such a state and the AC power supply 5 is cut off, the internal power supply 8 will be used instead of the power supply 5.
Power is supplied to the inverter unit 10 through the contacts of the switching unit ■9, which converts the DC to high frequency AC.
The fluorescent lamp light source 11 is turned on.

Of course, such guide lights inside a building indicate the location of the nearest evacuation exit, but if a fire happens to occur and the concentration of smoke inside the building increases, it will naturally It becomes difficult to see, especially when the external power source is cut off and the internal storage battery power source is used, as the light source dims over time and becomes even more difficult to see.

From this point of view, from both the legibility of the "arrow" and "emergency exit" characters written on the acrylic board on the front of the guide light, and the visibility (easiness of noticing) of the guide light indicating the evacuation exit,
A method has been proposed in which the light source is blinked to increase the evasion effect and to make effective use of the storage battery, and the optimum blinking cycle is determined from both legibility and visibility.

It is known that the longer the blinking cycle is, the more effective the legibility is, and the shorter the blinking cycle is, the more effective the visibility is.

However, conventional guide lights flash at regular intervals regardless of the surrounding smoke condition, so as the smoke density increases, legibility deteriorates, making evacuations dependent only on visibility, making them less effective. It wasn't a good method.

In addition, when the smoke density became too thick, even if the guide lights were flashed, the light would be scattered, and the storage batteries would be wasted.

The present invention eliminates the above-mentioned drawbacks and automatically changes the blinking time interval of the guide light depending on the density of smoke surrounding the guide light, taking into account readability and visibility, thereby enabling safe and quick evacuation. The purpose of this is to make more effective use of storage batteries, and in normal conditions when there is no smoke in the surrounding area, the flashing time interval is slightly longer to improve readability, and when there is smoke surrounding the guide light, In addition, as smoke density increases, legibility cannot be expected, so visibility should be emphasized, and the blinking cycle should be changed in the absence of smoke. The longer length reduces the power consumption of the storage battery and accelerates the flashing cycle when the smoke density increases.

An embodiment of the guide light according to the present invention will be described below with reference to FIGS. 3 and 4.

In the drawings, the same reference numerals are used for the same parts as in FIGS. 1 and 2.

That is, FIG. 3 shows a case in which a through hole 12 is provided in the casing of the conventional guide light shown in FIG. 1 so that surrounding smoke can easily enter the inside.

Further, FIG. 4 is a circuit diagram thereof, in which 14 is a light receiving detection element that detects the brightness of the light source, 15 is a conversion unit that converts the output signal of this detection element into a blinking time interval of the lamp light source 11, and 13 is this conversion unit. This is a switching section (2) that blinks the lamp light source 11 according to an output signal from the first section. Second
It is additionally attached to the one shown in the figure.

The brightness detection element 14 is mounted at a suitable distance from the lamp light source 11, and is configured so that surrounding smoke can easily enter the space inside the housing.

In such a configuration, when the above-mentioned general AC power source is cut off in an emergency such as a fire, the lamp light source 11 is turned on from the internal power source 8 via the switching section 9, the switching section 13, and the inverter section 10. However, the brightness when the light is turned on is detected and the light blinks repeatedly at predetermined intervals.

Under normal conditions where there is no smoke in the surrounding area, even if the blinking time interval is made longer, the guidance light can fully perform its intended display function.

However, if smoke builds up in the surrounding area and enters the interior of the guide light, the illuminance on the surface of the detection element 14 in the gap naturally decreases.

In general, in this type of detection element, when the illuminance decreases, the resistance of the element and thus the current changes, so the degree of this change is converted into the magnitude of the blinking time interval, thereby changing the blinking time interval of the lamp light source. .

Specifically, when smoke is rising, the blinking time is increased to make the guidance light display more visible.

In the embodiment of the present invention described above, the case is described in which the illumination light source of the guide light itself is used as the light source of the detection element, but of course, even if a separate detection light source is provided as an alternative to this, the same result will occur. Of course, the light source and its detection element may be provided outside the housing of the guide light, for example, in a hallway through which smoke passes.

As explained above, in the guide light according to the present invention, the blinking time interval of the display light source changes depending on the state or concentration of smoke around the guide light, so the intended display is particularly easy to see, and this makes it possible to improve the effectiveness of the guide light. Not only can this be used to guide evacuations, but it also has the effect of allowing the emergency internal storage battery power source to be used more efficiently.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventionally used guide light, Fig. 2 is a circuit diagram of the one shown in Fig. 1, Fig. 3 is a perspective view of a guide light according to the present invention, and Fig. 4 is a guide light according to the present invention. It is a circuit block diagram of a light. In the figure, 1 is the housing of the guide light, 5 is an AC power supply, 8 is an internal storage battery power supply, 11 is a light source, 12 is a through hole, 13 is for a blinking switching part, 14 is a light reception detection element, and 15 is a conversion part. .

Claims (1)

[Scope of Claims] 1. A light source that is continuously lit by an external AC power source and is lit intermittently by an internal DC power source in the event of a power outage of this power source, in which the light source circuit is provided with a light source that controls the brightness of the light source. a light reception detection element 14 that detects the light, a conversion section 15 that converts the output from this element into the magnitude of the blinking time interval of the light source, and a blinking switching section 13 that blinks the light source according to the output from this conversion section. A blinking evacuation guide light, characterized in that the blinking time interval of the light source is shortened in accordance with an increase in the light shielding density of smoke or the like surrounding the light source. 2 A light source that is controlled to selectively perform continuous lighting and intermittent lighting, and a light receiving detection element that operates in response to this light source are provided in a housing, and the housing has communication between the inside and outside, and the surrounding area. A blinking evacuation guide light according to claim 1, which is provided with a through hole through which a light shielding material such as smoke flows. 3 A light source that performs continuous lighting and intermittent lighting is installed inside the housing and outside the housing, and by reducing the illuminance of the light receiving detection element installed opposite to the light source outside the housing, it can be used to display characters inside the housing, evacuation direction, etc. A blinking evacuation guide light according to claim 1, wherein the blinking time interval of the light source is shortened.