JPS62119897A - Life extension device for incandescent lamp - 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] Lord! BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incandescent light bulb life extension device that extends the life of an incandescent light bulb and has an energy saving effect.

Replacement of incandescent light bulbs, etc. requires personnel to replace light bulbs in places with high ceilings, in places that cannot be easily reached, or in buildings with a large number of people such as hotels and restaurants. The overhead costs, including costs, are enormous.

Therefore, in order to extend the life of incandescent light bulbs, various incandescent light bulb life extension devices have been proposed and implemented.

As a means of achieving this, for a power supply voltage of 100 V,
There were methods of using a 0V incandescent light bulb, using a dimmer, or inserting a diode or thermistor into the circuit.

However, in the case of dimmers, although they are excellent at extending the life of incandescent light bulbs by suppressing inrush current and lighting at low voltages, the brightness settings must be adjusted every time the switch is turned on. (That is, manually setting the volume and brightness) is necessary and troublesome. In other words, the volume installed inside the dimmer has the function of limiting the inrush current flowing to the incandescent bulb and setting the conduction angle to the triac, so it is possible to reduce the inrush current. It is not possible to increase the conduction angle at the same time. Therefore, after the incandescent light bulb starts lighting, it is necessary to reset the volume in order to reach a predetermined brightness.

In addition, in the case of a diode, the brightness is about half of the normal brightness, making it dim, and in the case of a thermistor, the time it takes to turn on is not constant due to the difference in the capacity of the incandescent light bulb that is the load, which poses many practical problems. Conventional circuits using electronic circuits have complex structures, so it has been impossible to manufacture them at low cost.

The present invention was devised in view of the above circumstances, and aims to provide an incandescent light bulb life extension device that solves the above-mentioned technical problems, extends the life of an incandescent light bulb, and has an energy-saving effect. .

. , a device according to the present invention for reading a light bulb includes a triac connected in series to an incandescent light bulb, a delay circuit connected in parallel to the triac, and a first
and a series circuit of a resistor and a capacitor, and includes a control triac and a second resistor of lower value than the first resistor. A series circuit is connected in parallel to the first resistor, and the control triac is actuated by the delay circuit, and the triac is actuated based on the voltage charged to the capacitor via a trigger element. It is composed.

Immediately after the switch is turned on, current flows through the incandescent bulb through the trybook connected in series to the incandescent bulb with a conduction angle limited by the first resistor. When the delay circuit operates after a predetermined delay, the control triac turns on. Activation of the control triac gradually increases the conduction angle of the triac.

The causes of shortening the lifespan of incandescent light bulbs include the stress of large inrush currents during lighting, and the shortening of lifespan due to the ratio of lighting voltage to rated voltage.

First, the stress caused by the large inrush current during lighting is thought to be as follows. That is, the filament resistance of the incandescent light bulb before lighting is smaller than the rated resistance, and after lighting, the filament temperature rises and the resistance value gradually increases, eventually reaching the rated resistance.

Therefore, at the time of lighting, an instantaneous rush current flows 10 to 20 times the rated current. This large current applies stress to the filament.

Furthermore, the following formula exists for shortening the lifespan due to the ratio of lighting voltage to rated voltage.

FIG. 1 shows a block diagram of one embodiment of the invention. That is, in FIG. 1, a trybook 1 is connected in series to an incandescent light bulb 5.

However, the number of incandescent light bulbs is not limited to one, and includes cases where a plurality of incandescent light bulbs are connected in parallel.

Further, a delay circuit 6 is connected in parallel to the triac 1.

8 and 4 are series connection circuits of a resistor and a capacitor connected in parallel to the triac 1 and the delay circuit 6, and a trigger element 2 is connected between the intermediate connection point and the gate of the triac 1.

Further, a series connection circuit of a control triac 7 and a resistor 10 is connected in parallel to the resistor 8, and the gate of the control triac 7 is configured to be supplied with a gate current by the delay circuit 6.

Here, the resistance value of the resistor 8 is, for example, 1M ohm, and the resistance value of the resistor 10 is, for example, 220 ohms, so that the former is set to a higher resistance value than the latter.

Therefore, hereinafter, the resistor 8 will be referred to as a first resistor, and the resistor 10 will be referred to as a second resistor.

The operation of the incandescent lamp life extension device of the present invention will be explained below with reference to FIG.

(2) Initially (when the switch 9 is off), the triac 1, the control triac 7, and the trigger element 2 are all in an off state.

■By turning on the switch 9, the delay circuit 6 and the first resistor 8
A current flows through. Since the trigger current based on the first resistor 8 is small, the conduction angle of the current flowing through the triac 1 is extremely small, as indicated by 11 in FIG. That is, the inrush current to the incandescent light bulb is small.

■After the state (■) above continues for a predetermined time, when the set time of the delay circuit is reached, the gate current of the control triac 7 gradually increases, and in response to the increase in current, the gate current of the control triac 7
The load current increases. As the load current of the control triac 7 increases, the conduction angle of the triac 1 gradually increases, and the incandescent lamp 5 gradually becomes brighter (see FIG. 3).

■Finally, the triac 1 is mainly used as the second resistor 1
Conductivity occurs with a conduction angle defined by 0. Due to the conduction of triac 1, the incandescent light bulb becomes 100 as shown in 12 in Figure 3.
The lights will continue to be lit in a state similar to that of cedar.

Since the present invention is configured as described above, it is possible to suppress as much as possible the rush current caused by turning on the switch. Additionally, it is no longer necessary to operate the volume to set the brightness, which was necessary when using a conventional dimmer.

That is, by using the incandescent lamp life extension device according to the present invention, by simply turning on the switch, the lighting operation of the incandescent lamp can be started with a low inrush current, and the incandescent lamp can be automatically turned on to a predetermined brightness. It is very convenient because it can do this, and since it is lit at a lower voltage than the rated voltage of the incandescent bulb, it is possible to extend the life of the incandescent bulb.

Furthermore, by using the device of the present invention, energy saving effects can also be expected.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is an example of changes over time in a load current flowing through an incandescent light bulb. 1...Triac, 2...Trigger element, 4
... Capacitor, 5 ... Incandescent light bulb, 6 ...
Delay circuit, 7: Control triac, 8: First resistor, 9: Switch, 10: Second resistor.

Claims (2)

[Claims] (1) A triac connected in series to an incandescent light bulb, a delay circuit connected in parallel to the triac, and a series circuit of a first resistor and a capacitor, the value of which is lower than that of the control triac and the first resistor. A series circuit consisting of a second resistor is connected in parallel to the first resistor, and the control triac is actuated by the delay circuit, and the triac receives the voltage charged in the capacitor via a trigger element. An incandescent light bulb life extension device characterized in that it is configured to operate based on. (2) The incandescent lamp life extending device according to claim 1, wherein a plurality of said incandescent lamps are connected in parallel.