JPH01246791A - Fluorescent lamp with electric bulb base - Google Patents

Abstract

PURPOSE:To stop repeated twinkling at the final period of the lifetime of a fluorescent lamp quickly by furnishing a means to enlarge the preheating current for starting to flow through the fluorescent lamp when a starter device is in continuity. CONSTITUTION:A means 8 to provide excessive preheat current for starting consists of a compensation winding additionally wound on a core of a discharge lamp stabilizer 5, and when a starter device 6 is in continuity and the preheat current for starting flows through a fluorescent lamp 4, the series synthesized impedance of the main winding of discharge lamp stabilizer 5 and the compensation winding shall be made smaller than the sole impedance of the main winding so as to enlarge the preheat current for starting. This means 8 causes the discharge lamp stabilizer 8 to run temperature quickly and excessively when twinkle is begun in the final period of the lifetime of the fluorescent lamp 4 to blow a thermo-fuse of a security device 7, and power supply is shut off to extinguish the fluorescent lamp 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a lamp cap type fluorescent lamp having a built-in ballast, starting device, etc.

[Conventional technology]

Figure 5 shows a perspective view of a conventional light bulb base type fluorescent lamp;
The figure shows the electrical circuit diagram of a lamp base type fluorescent lamp. Fifth
In the figure and Fig. 6, 1 is a base, 2 is a resin lamp cover, 3 is a globe, 4 is a fluorescent lamp, 5 is a discharge lamp ballast, 6 is a starting device such as a glow starter, and 7 is a temperature fuse. In the heat-responsive protection device, 30 is an AC power source.

The conventional light bulb cap type fluorescent lamp described above integrates the fluorescent lamp 4, the discharge lamp ballast 5, the starting device 6, etc., and when the fluorescent lamp 4 reaches the end of its life, the discharge lamp ballast 5 and the starting device 6 They cannot be reused and are disposable.

In such a conventional light bulb cap type fluorescent lamp, when the fluorescent lamp 4 reaches the end of its life and the emitter wears out, it is no longer able to maintain the lighting state, and the operation of starting, lighting, and turning off is repeated. As a result, not only does the unpleasant blinking operation of the fluorescent lamp 4 continue, but also a starting preheating current flows through the fluorescent lamp 4 continuously and intermittently. This preheating current for starting is normally larger than the dump current when the fluorescent lamp 4 is normally lit, and the amount of heat generated from the discharge lamp ballast 5 is larger than when the fluorescent lamp 4 continues to be lit normally, so that the condition (
Depending on the power supply voltage (1, ambient temperature, etc.), the lamp cover 2 may melt or the discharge lamp ballast 5 may emit smoke.

Therefore, as shown in FIG. 2, in the conventional light bulb cap type fluorescent lamp, a thermally responsive protection device consisting of a temperature fuse is installed in the current path to the fluorescent lamp 4 in series with the discharge lamp ballast 5 in this example. 7 was inserted, and the thermally responsive protection device 7 was thermally coupled to the discharge lamp ballast 5 as shown by the broken line.

With this configuration, when the fluorescent lamp 4 reaches the end of its life and the discharge lamp ballast 5 generates excessive heat due to repeated start-up-turn-off operations, the heat-responsive protection device 7 is fused and opened. The power supply to the fluorescent lamp 4 is cut off to prevent unpleasant blinking of the fluorescent lamp 4, melting of the lamp cover 2, and smoke generation of the discharge lamp ballast 5.

[Problem to be solved by the invention]

The above-mentioned conventional light bulb base type fluorescent lamp has different lighting conditions: when the fluorescent lamp 4 continues to be in a normal lighting state, and when the fluorescent lamp 4 reaches the end of its life and repeats the operation of starting, turning on, and turning off. The difference in the current flowing through the lamp ballast 5 is small, and even when the operation of starting, turning on, and turning off the light is repeated, sufficient heat is generated from the discharge lamp ballast 5 to quickly melt down the heat-responsive protection device 7. is not obtained, and the thermally responsive protection device 7 is delayed in fusing, and especially when the power supply voltage is low or the ambient temperature is low, the fluorescent lamp 4 reaches the end of its life and repeats the operation of starting, turning on, and turning off. Even when the discharge lamp ballast 5 generates heat, the temperature rise is small, and the heat-responsive protection device 7 may not blow out. As a result,
The unpleasant blinking operation of the fluorescent lamp 4 continues.

Note that the fact that the heat-responsive protection device 7 does not blow out means that
Since the discharge lamp ballast 5 generates less heat, there is no problem in preventing the lamp cover 2 from melting and the discharge lamp ballast 5 from generating smoke.

An object of the present invention is to provide a light bulb cap type fluorescent lamp that can quickly stop unpleasant flickering at the end of its life even when the power supply voltage is low or the ambient temperature is low. be.

[Means to solve the problem]

The light bulb cap type fluorescent lamp of the present invention responds to heat generation due to continuous intermittent energization of the starting preheating current flowing through the fluorescent lamp, the discharge lamp ballast, the starting device, and the fluorescent lamp to at least the energizing path of the starting preheating current. A light bulb base type fluorescent lamp integrated with a heat-responsive protection device for shutting off, characterized in that it is provided with means for increasing the starting preheating current that increases the starting preheating current that flows through the fluorescent lamp when the starting device is turned on. .

[For production]

According to the configuration of the present invention, since the starting preheating current increasing means is provided, the starting preheating current flowing through the fluorescent lamp when the starting device is turned on becomes excessive.

As a result, when the fluorescent lamp reaches the end of its life and begins to blink repeatedly, the thermally responsive protection device opens in response to the rapid heat generation caused by the excessive starting preheating current. Therefore, when the fluorescent lamp reaches the end of its life and repeats the blinking operation, the supply of at least the starting preheating current to the fluorescent lamp is quickly interrupted, and the fluorescent lamp is turned off.

In addition, since the starting preheating current becomes excessive, even when the power supply voltage is low or the ambient temperature is low, the amount of heat generated by the continuous and intermittent application of the starting preheating current becomes sufficiently large.
The heat-responsive protection device shuts off quickly even when the power supply voltage is low or the ambient temperature is low.

〔Example〕

A first embodiment of this invention will be described based on FIG.

This bulb cap type fluorescent lamp includes a fluorescent lamp 4, a discharge lamp ballast 5 connected in series to the fluorescent lamp 4, a starting device 6 connected between a pair of non-power side electrode terminals of the fluorescent lamp 4, and a discharge lamp ballast 5 connected in series to the fluorescent lamp 4. The device 7 is integrated with a heat-responsive image 3 that cuts off at least the energization path of the starting preheating current in response to heat generation due to continuous intermittent energization of the starting preheating current flowing through the fluorescent lamp 4 when the starting device 6 is turned on. The light bulb cap type fluorescent lamp is characterized in that a starting preheating current increasing means 8 is provided for increasing the starting preheating current flowing through the fluorescent lamp 4 when the starting device 6 is turned on.

Specifically, in terms of an electric circuit, this light bulb cap type fluorescent lamp connects a fluorescent lamp 4 to an AC power source 30 via a series circuit of a thermally responsive protection device 7 consisting of a temperature fuse and a discharge lamp ballast 5. A starting device 6 comprising a glow starter and starting preheating current increasing means 8 are connected between a pair of non-power supply side electrode terminals of the fluorescent lamp 4.

In this case, the starting preheating current increasing means 8 consists of a compensation winding additionally wound around the iron core of the discharge lamp ballast 5. This compensation winding is connected to the main winding of the discharge lamp ballast 5 and the compensation 1! when the starting device 6 is conductive and a preheating current for starting is flowing through the fluorescent lamp 4. ! The series composite impedance of the wire is
It has a function of making the impedance of the main winding of the discharge lamp ballast 5 smaller than that of the main winding alone and making the starting preheating current larger than that without the compensation winding.

In addition, in terms of structure, the fluorescent lamp 4. Discharge lamp ballast5. Starting device 16. The thermally responsive protection device 7 and the compensation/winding which is the starting preheating current increasing means 8 are integrated as in the conventional example. Further, a thermally responsive protection device 7 is thermally coupled to the discharge lamp ballast 5.

This light bulb cap type fluorescent lamp has a starting preheating current increasing means 8.
is provided, the fluorescent lamp 4 is turned off when the starting device 6 is turned on.
The starting preheating current flowing to the engine becomes excessive. In this case, the compensation winding serving as the starting preheating current increasing means 8 increases the starting preheating current flowing through the fluorescent lamp 4 when the starting device 6 is turned on without increasing the lamp current during lighting.

First, when the AC power supply 30 is turned on when it is not at the end of its life, the starting device 6
conducts, a starting preheating current flows through the fluorescent lamp 4, and the fluorescent lamp 4 is preheated, and then the fluorescent lamp 4 is turned on by the kick voltage generated when the starting device 6 is opened. At this time, since the period during which the starting preheating current is flowing is very short, the temperature fuse, which is the thermally responsive protection device 7, will not melt.

On the other hand, when it reaches the end of its lifespan, it operates as follows.

That is, when the AC power 'a30 is turned on, the starting device is turned on for a short period of, for example, about 1 second or less, and after the starting preheating current flows through the fluorescent lamp 4 and the fluorescent lamp 4 is preheated, the starting device 6 is opened. The kick voltage generated by this causes the fluorescent lamp 4 to turn on. However, fluorescent lamp 4
cannot sustain the lighting and immediately goes out, and the starting device 6 becomes conductive again to repeat the above operation, and the intermittent starting preheating current continues to flow.

In this case, since the compensation winding increases the starting preheating current, when the fluorescent lamp 4 reaches the end of its life and starts blinking, the discharge lamp ballast 5 quickly and excessively generates heat. Then, due to this excessive heat generation, the temperature fuse which is the protection device 7 is blown and opened, the power supply to the fluorescent lamp 4 is cut off, and the fluorescent lamp 4 is turned off.

In addition, since the starting preheating current becomes excessive, even when the power supply voltage is low or the ambient temperature is low, the amount of heat generated by the continuous and intermittent application of the starting preheating current becomes sufficiently large.
A heat-responsive protective bag even when the power supply voltage is low or the ambient temperature is low! 7 will immediately shut it down.

This light bulb cap type fluorescent lamp is equipped with a starting preheating current increasing means 8 that increases the starting preheating current flowing through the fluorescent lamp 4 when the starting device 6 is turned on, so that it can be used when the power supply voltage is low or the ambient temperature is low. However, the unpleasant blinking operation of the fluorescent lamp at the end of its life can be quickly stopped.

A second embodiment of the invention will be described based on FIG.

This light bulb cap type fluorescent lamp uses a starting device 13 instead of the starting device 6 shown in FIG. 1, and uses starting preheating current increasing means 10 instead of starting preheating current increasing means 8. The other configurations are the same as in the first embodiment.

The starting device 13 is composed of a series circuit of a resistor 9 and a mechatronic switch 11 connected between a pair of non-power side electrode terminals of the fluorescent lamp 4, and a control circuit 12 connected in parallel to this series circuit, and is configured to control the starting preheating current. The increasing means 10 is composed of a diode inserted in a series circuit of a resistor 9 and a mechatronic switch 11. The mechatronic switch 11 is a bimetallic switch and is opened by the heat generated by a control heater (not shown). It has become.

In this starting device 13, when the AC power source 30 is turned on, the mechatronic switch 11 is turned on for, for example, about 1 second by the control action of the control circuit 12, and a starting preheating current flows through the fluorescent lamp 4 during that period, and then Mechatronic switch 1
1 is turned off, a kick voltage is generated, and the fluorescent lamp 4 is lit by this kick voltage. In this case, a diode serving as the starting preheating current increasing means IO is inserted in the energization path of the starting preheating current, and the half-wave energization of the discharge lamp ballast 5 due to the rectifying action of this diode causes the discharge lamp ballast 5 to The impedance is lower than when the current is applied in both waves, and compared to the conventional circuit shown in FIG. 6, only the starting preheating current can be increased.

Even in such a lamp cap type fluorescent lamp, as in the first embodiment, when the lamp is lit normally, the preheating current for starting flows only for a very short period of about 1 second, so the discharge lamp is stable. There is almost no temperature rise in the container 5, and the protection device 7 will never open.

On the other hand, when the fluorescent lamp 4 reaches the end of its life and is unable to maintain its lighting state, the mechatronic switch 11 repeatedly turns on and off, and a large starting preheating current flows continuously and intermittently, the discharge lamp ballast 5 suddenly and The temperature will rise excessively and the protection device 7 will open.

This embodiment has the same effects as the first embodiment.

A third embodiment of the invention will be described based on FIG.

This light bulb cap type fluorescent lamp has the protective device 7 shown in FIG. 2 thermally coupled to the resistor 9, and the other configurations are the same as in the second embodiment.

In this embodiment, the temperature fuse, which is the protection device 7, will blow in response to an excessive temperature rise in the resistor 9 when the starting preheating current flows continuously and intermittently.

Note that in this circuit, although the voltage of the AC power source 30 is still applied to the fluorescent lamp 4, preheating is not performed, so the blinking operation is not repeated.

In this embodiment, the protection device 7 is opened by the heat generated by the resistor 9 in the current path dedicated to supplying the preheating current.
Since the resistor 9 does not generate heat during normal lighting, there is no need to set the fusing temperature of the temperature fuse, which is the protective device 7, so high that the heat generated by the current flowing during normal lighting does not cut it off, and this makes it difficult to detect abnormalities in the fluorescent lamp 4. You can improve your abilities.

Therefore, the protection device 7 can be opened more quickly than in the second embodiment.

Other effects are similar to those of the second embodiment.

A fourth embodiment of the invention will be described based on FIG. 4.

This bulb cap type fluorescent lamp uses a starting device 20 in place of the starting device 13 shown in FIG.

This starting device 20 includes a pulse transformer 14, a voltage responsive switch (SSS) 15, a capacitor 16, and a diode 1.
8 and a resistor 19, a capacitor serving as a starting preheating current increasing means 17 is connected in parallel to a parallel circuit of a diode and a resistor 19, and a temperature fuse serving as a protection device 7 is connected to increase the starting preheating current of the starting device 20. The resistor 19 is inserted in series in the current-carrying path of the resistor 19, and is thermally coupled to the resistor 19.

In this starting device 20, by the switching action of the voltage responsive switch 15, a sufficient preheating current for starting is passed through the fluorescent lamp 4 during the positive half cycle of the AC power supply 30, and a pulse voltage necessary for starting is generated during the negative half cycle. It is configured to allow

Due to the circuit operation during the pulse generation period in the above-mentioned negative half cycle, charge is accumulated in the capacitor of the starting preheating 'rIi flow excessive flow film formation means with the polarity shown in the figure, and the AC power supply 30
When the voltage polarity of the voltage response switch 15 is reversed to the royal power, the voltage of the AC power supply 30 and the voltage of the capacitor, which is the starting preheating current increasing means 17, are added and applied to the voltage response switch 15. The ignition phase is advanced and a large starting preheating current flows.

After the fluorescent lamp 4 is started, the voltage across the fluorescent lamp 4 drops to a value lower than the breakover voltage of the voltage responsive switch 15, so the voltage responsive switch 715 does not become conductive.

At the end of the life of the fluorescent lamp 4, the starting circuit 20 repeats the starting operation. As a result, the resistor connected in parallel to the capacitor, which is the starting preheating current increasing means 17, rapidly generates heat and rises in temperature, causing the protection device 7 to melt.

The effects of this embodiment are similar to those of the third embodiment.

〔Effect of the invention〕

According to the light bulb cap type fluorescent lamp of the present invention, since the starting preheating current increasing means is provided to increase the starting preheating current flowing through the fluorescent lamp when the starting device is turned on, it is possible to increase the starting preheating current when the power supply voltage is low or the ambient temperature is low. Even when the temperature is low, it is possible to quickly stop the unpleasant flickering operation of a fluorescent lamp at the end of its life.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of a first embodiment of the present invention;
FIG. 2 is a circuit diagram showing the configuration of a second embodiment of the present invention;
FIG. 3 is a circuit diagram showing the configuration of a third embodiment of the present invention;
FIG. 4 is a circuit diagram showing the configuration of a fourth embodiment of the present invention;
FIG. 5 is a perspective view showing the configuration of a conventional light bulb base type fluorescent lamp;
FIG. 6 is also an electrical circuit diagram. 4...Fluorescent lamp, 5...Discharge lamp ballast, 6...
Starting device, 7...Protective device, 8...Starting preheating current over-increasing means, 30...AC power supply M3 Fig. 4 Fig. 5 Fig. 6

Claims (1)

[Claims] A fluorescent lamp, a discharge lamp ballast connected in series to the fluorescent lamp, a starting device connected between a pair of non-power side electrode terminals of the fluorescent lamp, and a starting device that flows to the fluorescent lamp when the starting device is conductive. In a light bulb cap type fluorescent lamp integrated with a heat-responsive protection device that cuts off at least a starting preheating current conduction path in response to heat generation due to continuous intermittent energization of a preheating current, the fluorescent lamp A light bulb cap type fluorescent lamp characterized by being provided with a starting preheating current increasing means for increasing the starting preheating current flowing through the lamp.