JPH0330913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an emergency lighting device that switches the lighting level in response to an external signal.

2. Description of the Related Art Conventionally, guide light devices have been known that emit flashing light in response to, for example, a fire signal. However, most of these have separate light sources for flashing and continuous illumination, such as illumination of guide display boards. Therefore, these products tend to be expensive and large in size. For this reason, it has been proposed to use a single light source, keep it on continuously at all times, and turn it on and off in emergencies. However, although mere blinking can improve the so-called eye-attractiveness that attracts the user's attention, the effect as an illumination is impaired. For example, in a guide light device, the so-called readability of identifying the contents of the display board is reduced. Therefore, it is desired to use a common light source, to turn on continuously at all times, and to repeat high and low levels during emergencies, thereby satisfying both eye appeal and legibility.

The present invention was made in consideration of the above circumstances, and is designed to repeat high and low illumination levels for emergency purposes, to prevent deterioration of lamp life as much as possible, to achieve stable lighting, and to achieve relatively high and low illumination levels. The object is to provide an emergency lighting device with a simple configuration.

The present invention has a first operating device for lighting the discharge lamp from a commercial power source, and a second operating device for lighting the electric lamp at high frequency when the commercial power source is out of service.
and the second actuating device are configured to have variable outputs, and when an emergency situation occurs during power supply of the commercial power source, the light output of the discharge lamp is periodically switched by the first actuating device, and at least The present invention is characterized in that when the light output of the discharge lamp is at a low level, the high frequency voltage of the second actuating device is supplied to the discharge lamp. According to the present invention, a high frequency voltage is supplied to the discharge lamp when the light output of the discharge lamp is at a low level when power is supplied from a regular power source, so that the electric lamp can be stably lit. In other words, it is known that when the light output of a discharge lamp is lowered (dimmed), the lamp current pause period becomes longer and unstable conditions such as flickering occur. By doing so, it is possible to compensate for the quiescent period of the lamp current, and stable lighting can be obtained. Furthermore, since the filament of the discharge lamp can be heated by the high-frequency voltage, the lamp life can be prevented from deteriorating.

Furthermore, since the present invention utilizes the second actuating device, which operates by being supplied with power from an emergency power source such as a battery during a power outage of the regular power source, as described above, when power is supplied to the regular power source, the configuration is simple. It is also possible to reduce the cost.

In the present invention, the first actuating device can be constituted by a well-known ballast and a dimming impedance element provided in series with the ballast. However, it is also possible to change the impedance element to a phase control element.

Further, in the present invention, the second actuating device mainly consists of a well-known inverter, and by changing the input voltage of each inverter or adding an impedance device capable of changing the impedance value to the output side of the inverter. It can be configured to change the output depending on the output.

Further, in the present invention, the first and second actuating devices are controlled in response to signals from an automatic or manual fire alarm, fire detector, or the like. The control device for controlling the first and second actuating devices may include an oscillator that periodically outputs a signal, a contact or non-contact switch device that responds to the output of the oscillator, and the like.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 denotes a regular power source, and 2 a discharge lamp, which is normally energized by the regular power source 1. Reference numeral 3 denotes a first operating device, which is interposed between the regular power source 1 and the discharge lamp 2, and is capable of switching the lighting level of the discharge lamp 2. That is, in this embodiment, a first impedance element 4 and a second impedance element 5 are connected in series, and one impedance element 5 can be short-circuited. The first impedance element 4 is a well-known Chi-Yoke coil type ballast, and the second impedance element 5 is a Chi-Yoke coil for dimming. Reference numeral 6 denotes a second actuating device, which is supplied with power from the emergency power source 7 during a power outage of the regular power source 1 and outputs a high frequency voltage to energize the discharge lamp 2. Also,
This second actuating device 6 is of a variable output type. In this embodiment, an impedance device 8 whose impedance value can be changed is provided on the output side of a well-known inverter 9.
In addition, in FIG. 1, the emergency power source 7 is a battery. For this reason, although a well-known charging circuit 10 is provided, the emergency power source 7 may be provided separately. Next, 11 is a control device that responds to an external signal, such as a signal from a fire alarm. 1st
In the figure, 12 is a relay linked to a fire alarm. The control device 11 responds to an external signal and controls the first actuating device 3 to periodically switch the lighting bell of the discharge lamp 2 when power is supplied from the regular power source 1, and also controls the second actuating device 3. The device 6 is controlled to supply the high frequency output of the second actuating device 6 to the discharge lamp 2 at least when the discharge pox 2 is lit at a low level by the first actuating device 3. Further, during a power outage of the regular power source 1, the output of the second actuating device 6 is changed periodically. In this embodiment, the control device 11 includes an oscillation device 13 that operates under the control of an external signal, that is, the relay 12, and this oscillation device 1.
an excitation coil 14 that is excited in accordance with the output of No. 3;
Contacts 15, 1 controlled by this excitation coil 14
6, 17, and 18. As the oscillation device 13, a well-known device can be used, but for example, as shown in FIG. Said tension oscillation circuit 19
It is possible to use a device having a reset circuit 23 of the PUT 22 shown in FIG. The output frequency of this oscillation device 13 is, for example, 1H _Z
It is. The contact 15 is provided in parallel with the second impedance element 5 in the first actuating device 3, and the contact 16 is provided to be able to change the impedance value of the impedance device 8 in the second actuating device 6. Further, the contact 17 is provided between the output terminal of the second actuating device 6 and the discharge lamp 2. Furthermore, a contact 18 is provided between the input of the oscillating device 13 and the input of the second actuating device 6 together with a diode 24 connected in parallel.

Furthermore, in FIG. 1, 25 is a Luray excitation coil for power failure detection. This excitation coil 25
A contact 26 is provided between the emergency power supply 7 and the second actuating device 6, and another contact 27 switches the discharge lamp 2 to the starting circuit 28 for the regular electric lamp or to the output terminal of the second actuating device 6. It is provided so that it can be connected. Further, 29 supplies electric power to the control device 11, and a second
This is an auxiliary DC power source for supplying power to the second actuating device 6 when the second actuating device 6 is actuated. However, if power is supplied to the control device 11 and the second actuating device 6 from the emergency power source 7 or the charging circuit 10, the auxiliary DC power source 29 can be omitted.

Next, we will discuss the effect. First, when power is being supplied from the common power supply 1 and there is no external signal, the second impedance element 5 of the first actuating device 3 is short-circuited, and the discharge lamp 2 is lit at a level of 100%, for example. Next, when there is an external signal, the oscillation device 13 of the control device 11 outputs a 1H _Z signal. Therefore, the excitation coil 14 repeatedly turns on and off the contacts 15 and 16 by energizing and de-energizing, and also turns the contacts 15 and 16 on and off.
Turn 7 and 18 off and on. Therefore, the lighting level of the discharge lamp 2 is periodically switched. On the other hand, the inverter 9 of the second actuating device 6 is connected to the contact 18
It is operated by being periodically supplied with power through the circuit, and outputs a high frequency voltage. Furthermore, while the contacts 16 and 17 are also periodically turned on and off or turned off and on, high-frequency power is eventually supplied to the discharge lamp 2 only when the discharge lamp 2 is at a low lighting level due to the second impedance element 5. It is something. Moreover, the high frequency voltage is controlled to be low by the impedance device 8. At this time, discharge lamp 2
100% −26 via the first actuating device 3
If power is supplied for % lighting, and power is supplied for 0%-10% lighting via the second actuating device 6,
The discharge lamp 2 periodically repeats lighting from 100% to 36%.

Next, when the regular power supply 1 is out of power, the emergency power supply 7
At this time, when the second actuating device 6 outputs a high frequency voltage, the second actuating device 6 turns on the discharge lamp 2 at a certain level, for example 36%, because the control device 11 will not operate without an external signal. do. Furthermore, since the impedance value of the impedance device 8 can be periodically switched when an external signal is present, the discharge lamp 2 can periodically repeat 10% to 36% as described above.

In the present invention, the lighting level of the discharge lamp can be set arbitrarily. Further, when switching the lighting state during power supply from the regular power supply, the high frequency voltage may be supplied to the discharge lamp while the discharge lamp is lit at a high level.

As described in detail above, the present invention periodically switches the lighting level of a discharge lamp in response to an external signal, and when the lighting level of the discharge lamp is switched when power is supplied from a regular power source. At least when the discharge lamp is lit at a low level, high-frequency voltage is supplied to the discharge lamp, so the discharge lamp can be stably lit and the lamp life can be prevented from deteriorating. Further, since the second actuating device for use during a power outage is used as a means for supplying the high frequency voltage to the discharge lamp, the structure is simple and can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention.
The figure is a circuit diagram showing an example of an oscillation device. DESCRIPTION OF SYMBOLS 1... Regular power supply, 2... Discharge lamp, 3... First actuation device, 6... Second actuation device, 7... Field power supply, 11... Control device

Claims (1)

[Scope of Claims] 1. A discharge lamp that is always powered by a regular power source; A first operating device that is interposed between the discharge lamp and the regular power source and is capable of switching the lighting level of the discharge lamp; a variable-output second actuating device that is supplied with power from the emergency power source in the event of a power outage and outputs a high-frequency voltage to energize the discharge lamp; and the first actuator that responds to an external signal and operates when power is supplied from the regular power source. controlling a device to periodically switch the lighting level of the discharge lamp, and controlling the second actuating device to supply a high frequency voltage to the discharge lamp at least when the light output of the discharge lamp is at a low level; An emergency lighting device comprising: a control device that periodically changes the output of the second actuating device during a power outage of the regular power supply. 2. The first actuating device has first and second impedance elements connected in series, and one of the first and second impedance elements can be short-circuited. An emergency lighting device according to claim 1. 3. Claim 1 or 2, characterized in that the second actuating device comprises an inverter and an impedance device with variable impedance value provided on the output side of the inverter.
Emergency lighting equipment as described. 4. The control device includes a transmitting device that periodically generates an output in response to an external signal, an excitation coil that is excited when the output of the transmitting device is generated, and a control device that controls the first and second signals by being controlled by the excitation coil. 4. The emergency lighting device according to claim 1, further comprising a plurality of contacts for controlling an actuating device. 5. When the control device is powered by a regular power source,
The emergency lighting according to any one of claims 1 to 4, wherein the second actuating device is activated in synchronization when the light output of the discharge lamp is at a low level. Device. 6. The emergency lighting device according to claim 5, wherein the output of the second actuating device is reduced by the control device.