JPS5854800Y2 - Energy-saving automatic light flasher - Google Patents

Description

[Detailed explanation of the idea] Nowadays, people are calling for power saving, and street lights are left on until it gets sufficiently light in the early morning, which is unnecessary lighting. It is desirable to have a light-off sensitivity that does not cause any inconvenience or danger, and also saves power.

Figure 1 shows a circuit wiring diagram of a conventional non-contact automatic light flashing mechanism that controls the triac gate current and flashes the load light by operating circuit A using a reed relay, and its operation is performed at night. When AC power is applied between power terminals 1 and 2, the current passing through the current limiting capacitor 3 is converted to DC by the bridge rectifier 4 and flows to the electromagnetic coil 5 of the reed relay, so the reed switch 6 is closed and the triac 7 closes the gate. When excited, conduction is established between T-1 and T-2, and the load lamp 8 connected to it is lit, but around sunrise, the resistance value of the photoconductive cell 9 gradually decreases due to sunlight irradiation. The current that has been flowing through the electromagnetic coil 5 is gradually transferred to the photoconductive cell 9, and eventually the electromagnetic coil 5 decreases to the open current value, the reed switch 6 is opened, and the gate of the triac 7 stops being excited. Shi T-1,
There is no conduction between T-2 and the load lamp 8 is turned off, but when the rice is submerged again, the resistance value of the photoconductive cell gradually increases and the electromagnetic coil reaches the current value, which closes the reed switch 6 and turns off the load lamp 8. lights up and spends the night.

A reed relay is a combination of a reed switch and an electromagnetic coil to operate it.
This is an enclosed contact in which a pair of magnetic lead pieces are sealed together with an inert gas inside a glass tube.

An example of its use is in an electromagnetic coil.If a current of C03mA is applied, the magnetic lead pieces will attract each other and the contact will close, but due to the hysteresis phenomenon of the magnetic lead pieces, the electromagnetic coil current will not be reduced to 1.5mA. The contact does not open, that is, the open current value is 1 while the touching current value is 3 mA.
．． Since it is 5 mA, the impression/open current ratio is 0.5, which is a value of about 0.4 to 0.6 in a general reed relay.

In this case, the operation circuit A shown in FIG.
, 2, and by newly connecting an auxiliary capacitor 10 between this junction P and the T-2 terminal of the triac 7, the load light 8 can be turned off by advancing the light-off operation time at sunrise. Figure 2 shows the circuit connections for a power-saving device that shortens the lighting time.

To explain the operation of the operating circuit A using diagrams, Fig. 3 shows the daytime state, in which the triac 7 is in an open circuit state, so the load light 8 is off, and the current limiting capacitor 3 and the auxiliary capacitor 10 are in the load light. However, the resistance value of the load lamp is negligibly small compared to the capacitive reactance of the capacitor, so the equivalent circuit is as shown in FIG.

Figure 5 shows the nighttime state, where the triac 7 is in a closed circuit state, so the load light 8 is on, and the triac 7 is in a closed state.
The T-2 terminal of is at the same potential as the power supply terminal 2, and the auxiliary capacitor 10 is connected in series with the current limiting capacitor 3 and in parallel with the coil circuit, and the equivalent circuit thereof is as shown in FIG.

That is, in daytime conditions, the combined current of the current limiting capacitor 3 and the auxiliary capacitor 10 flows through the electromagnetic coil 5 as well as the photoconductive cell 9.
However, under nighttime conditions, current limiting condenser 3
Since only the current flows and is also bypassed to the auxiliary capacitor 10 connected in parallel with the electromagnetic coil 5, the electromagnetic coil current has a somewhat lower value than in the daytime state.

Figure 7 is a graph showing the relationship between external light illuminance and electromagnetic coil current when using a conventional operation circuit.The electromagnetic coil current gradually increases as the illuminance decreases at sunset, and reaches a point where it reaches 3 mA at an illuminance of 20 lux. The switch closes, and the load light turns on, and after one night, around sunrise, the electromagnetic coil current gradually decreases, and when it reaches 1.5 mA at an illuminance of 100 lux, the reed switch opens. The load lights will be turned off accordingly.

Figure 8 is a graph based on the operating circuit of the present invention.As the illuminance decreases during rice submersion, the electromagnetic coil current gradually increases, and when it reaches 3 mA at an illuminance of 20 lux, the electric switch closes and the triac T- 1, T-2 becomes conductive, the load lamp lights up, and the wiring diagram shown in Figure 3 is automatically converted to the wiring diagram in Figure 5, so the electromagnetic coil current drops to 2 mA, but the lead Since the relay's open current value does not drop to 1.5 mA, the light remains on all night.

Around sunrise, the electromagnetic coil current gradually decreases as the illuminance rises, and when it reaches 1.5 mA at an illuminance of 35 lux, the reed switch opens and the triac's T-1 and T-2 are disconnected. Continuity occurs and the load light turns off, and the wiring diagram shown in Figure 5 is automatically converted to the wiring diagram in Figure 3, so the electromagnetic coil current rises to 2.5 mA, but the reed relay's current value is 3 mA. Since the lights do not reach this point, the lights remain off until daytime.

Conventionally, the lights would not turn off unless the illuminance reached 100 lux at sunrise, but now they turn off at 35 lux, meaning that the lights go out earlier by the time difference between them, reducing the amount of time the load lights are turned on at night, which reduces power consumption. consumption can be saved.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of a conventional non-contact automatic light flasher, Figure 2 is a circuit diagram of the power-saving type according to the present invention, Figure 3 is a daytime operation circuit diagram, and Figure 4 is an equivalent circuit diagram of Figure 3. , Figure 5 is an operation circuit diagram at night, Figure 6 is an equivalent circuit diagram of Figure 5,
Figure 7 shows the illumination intensity and coil current graph in the conventional circuit.
Figure 8 is a graph of illuminance and coil current in the proposed circuit.

Claims (1)

[Scope of utility model registration request] For the purpose of controlling the gate current of the switching element triac 7 for blinking the load lamp 8, a coil circuit combining a current limiting capacitor 3, a bridge rectifier 4, and a reed relay electromagnetic coil 5, and a photoconductive cell 9 are connected in series and in parallel. In the operating circuit A where the circuit is connected between the power supply terminals 1 and 2, by additionally connecting an auxiliary capacitor 10 between this junction point P and the T-2 terminal of the triac 7, the light-off operation can be performed at a time when the external light illuminance is low. This is a power-saving automatic light flasher that saves power by shortening the lighting time of the load light 8.