JP2002270385A - Electric discharge lamp, electric discharge lamp equipment, and electric discharge lamp system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress sputtering at the time of lighting starting, and also to make the composition compact by making numbers of wiring of a power supply circuit minimum, and by putting a filament preheating means into effect. SOLUTION: In an electric discharge light 12 containing one pair of filaments F1 and F2 for electric discharge, power supply terminals T1 and T2 of one per every filaments connected to one end of each filaments F1 and F2, and a capacitor 13 connected between the other ends of each filaments F1 and F2, are provided. Preheating current flows on each the filaments F1 and F2 through the capacitor 13 at the time of lighting starting possess. It is connected to the power supply circuit 20 by 2 wiring through the power supply terminals T1 and T2. Between the one end of this filament and the other end is bypassed for each of every filaments F1 and F2, and the capacitors C1 and C2 for alternate-current bypassing for each the every filaments may be provided further. The capacitors 13, C1 and C2 are stored in a cap 12a of the electric discharge light 12 or in an adapter 14a, or in a socket 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultraviolet discharge lamp, a fluorescent lamp, and other discharge lamps used in an ultraviolet disinfection device or a sterilization device, and more particularly to a discharge lamp device including the discharge lamp. And a discharge lamp system including the discharge lamp or the discharge lamp device.

[0002]

2. Description of the Related Art Conventionally, there are two-terminal type and four-terminal type ultraviolet discharge lamps. FIG. 10 shows an example of a two-terminal type discharge lamp 10 and a power supply circuit 20 associated therewith. In the two-terminal type, one is provided at each end of a pair of discharge filaments F1, F2 in the discharge lamp 10. Power supply terminals T1 and T2 are provided, and are attached to and detached from the power supply circuit 20 via the power supply terminals T1 and T2. The power supply circuit 20 includes, for example, a DC converter 2 that converts a power supply from a commercial AC power supply 21 into a DC voltage.
2, an inverter circuit 23 for converting the DC voltage into a predetermined high-frequency voltage, and a series resonance circuit including a choke coil 24 and a capacitor 25. In general, in an ultraviolet disinfection device or a sterilization device, the power supply circuit 20 is disposed on the side of the control panel that is separated from the ultraviolet discharge lamp 10, so that the wiring section 30 therebetween is relatively long. In the two-terminal type, since the number of wirings in the wiring section 30 is only two, the configuration is simple and the cost is low. In addition, since the base structure of the discharge lamp 10 requires only two terminals, the structure is simplified, and the cost of the discharge lamp 10 itself is low. On the other hand, while having such advantages, since the high-frequency signal is directly applied at the time of starting the lighting without preheating the filaments F1 and F2, sputtering occurs and the lamp life is shortened. The same problem can occur not only in the ultraviolet discharge lamp but also in other discharge lamps.

On the other hand, in the four-terminal type discharge lamp 11, as shown in FIG. 11, if only one power supply terminal T1, T2 is provided at each end of a pair of discharge filaments F1, F2 in the discharge lamp 11, respectively. And each filament F
Preheating terminals T3 and T4 are provided at the other ends of F1 and F2, respectively. The preheating terminals T3 and T4 are connected to the wiring section 3
0, the preheating transformer 26 on the power supply circuit 20 side
Is connected to the secondary side. In such a four-terminal type,
Since the filaments F1 and F2 are preheated at the start of lighting, sputtering can be prevented and the lamp life can be extended. On the other hand, since the number of wires in the wiring unit 30 is four, the configuration is complicated and the cost is high. Further, the base structure of the discharge lamp 11 has four terminals, which is complicated, and the cost of the discharge lamp 11 itself increases. Further, a preheating transformer 26 is provided on the power supply circuit 20 side.
This is disadvantageous also in this respect. The same problem can occur not only in the ultraviolet discharge lamp but also in other discharge lamps.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to minimize the number of wires to the power supply circuit side, and to perform sputtering at the time of starting lighting by preheating the filament. An object of the present invention is to provide a discharge lamp, a discharge lamp device, and a discharge lamp system which can suppress the lamp life and prolong the life of the lamp, and which can be easily handled as a compact structure as a whole.

[0005]

According to a first aspect of the present invention, a discharge lamp includes a discharge lamp body including a pair of discharge filaments, and a base provided on the discharge lamp body, wherein each of the filaments is provided. One end of each power supply terminal for each filament connected to one end of the filament, and a capacitor housed inside the base and connected between the other ends of the filaments. I do. A discharge lamp according to a second aspect of the present invention is a discharge lamp main body including a pair of discharge filaments, and an adapter attached to the discharge lamp main body, wherein each of the filaments is connected to one end of the filament. One that exposes one power supply terminal and one that is housed inside the adapter,
A capacitor connected between the other ends of the filaments. A discharge lamp device according to a third aspect of the present invention is a discharge lamp including a pair of discharge filaments,
A socket in which terminals connected to each end of each filament are exposed, and a socket to which the discharge lamp is detachably attached, wherein one terminal is connected to each filament connected to one end of each filament of the discharge lamp. A power supply terminal is connected to a power supply line, and a capacitor housed inside the socket and connected between terminals connected to the other ends of the filaments of the discharge lamp.

According to a fourth aspect of the present invention, in the discharge lamp or the discharge lamp device, an AC current bypass capacitor for each filament, which bypasses between one end and the other end of the filament, Is further provided. A discharge lamp system according to a fifth aspect of the present invention includes the discharge lamp or the discharge lamp device, a power supply line connected to one power supply terminal for each filament, and the power supply line. And a power supply circuit for supplying power to the discharge lamp through the power supply circuit.

[0007]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a discharge lamp 12 according to the present invention. The main body of the discharge lamp 12 includes a glass tube 12c, bases 12a and 12b provided at both ends thereof, and a glass tube 12c provided therein. And a pair of discharge filaments F1 and F2. One base 12
a, one power supply terminal T1, T for each filament connected to one end of each filament F1, F2.
2 are provided to be exposed in a plug-in type. That is, one end of one filament F1 is connected to the terminal T1 via a connection inside the base 12a, and one end of the other filament F2 is connected to the base 12a via a connection line 12d extending along the outside of the glass tube 12c. To the terminal T2 provided at A capacitor 13 is inserted and connected between the other ends of the filaments F1 and F2, and the capacitor 13 is housed inside one of the bases 12a. That is, the other end of one filament F1 is
The other end of the other filament F2 is connected to the other end of the capacitor 13 inside the base 12a via a connection line 12e extending along the outside of the glass tube 12c. Connect. In the drawing, the capacitor 13 is illustrated as being housed inside the base 12a, but may be housed inside the other base 12b.

In the case of FIG. 1, a socket (not shown) to which the discharge lamp 12 is detachably mounted is provided corresponding to one base 12a. The number of wirings of the wiring portion 30 extending from the socket (not shown) to the power supply circuit 20 is only two corresponding to the two terminals T1 and T2, and has a simple configuration in which the number of wirings is minimized. Has become. In the configuration of FIG. 1, the condenser 13 is connected to the base 12 a or 12 a of the discharge lamp 12.
Since the discharge lamp 12 is housed inside the discharge lamp 12, the external appearance of the discharge lamp 12 can be made compact and easy to handle. It is to be noted that the two plug-type terminals T1 and T2 are not limited to being provided on one side of the base 12a, and the other plug-type terminal T2 may be provided on the side of the other base 12b. In that case, a socket (not shown) to which the discharge lamp 12 is detachably mounted is provided corresponding to both the bases 12a and 12b.

FIG. 2 shows the discharge lamp 12 connected to a power supply circuit 20.
1 shows an example of an electric circuit of a discharge lamp system connected to the above. A power supply circuit 20 is provided with a DC converter 22 for converting a power supply from a commercial AC power supply 21 into a DC voltage, similarly to the conventional one.
And an inverter circuit 23 for converting the DC voltage into a predetermined high-frequency voltage, and a choke coil 24. The capacitor that forms a series resonance circuit together with the choke coil 24 is provided by the capacitor 13 on the discharge lamp 12 side, and therefore does not need to be provided on the power supply circuit 20 side. That is, the capacitor 13 performs both the resonance action and the filament preheating action. Here, the capacitor 13 is connected to each filament F
1 and F2, it is provided not on the power supply circuit 20 but on the discharge lamp 12 side.
Therefore, as described above, the power supply circuit 20 and the discharge lamp 12
The number of wirings of the wiring part 30 connecting the two may be only two connecting to the two power supply terminals T1 and T2, and the wiring can be simplified.

With this configuration, a power switch (not shown) provided on the side of the power supply circuit 20 is turned on to turn on the discharge lamp 1.
At the time of lighting start for starting power supply to the second power supply terminal 2, one power supply terminal T1, one end of one filament F1, and the other end of the one filament F1 pass through the capacitor 13 and one end of the other filament F2. A preheating current flows through a route passing through the other end of the other filament F2 and the other power supply terminal T2. FIG. 3 exemplifies the voltage characteristics between the filaments F1 and F2, that is, the voltage of the capacitor 13 at the time of starting the lighting. "ON" indicates the time when the power switch is turned on, and "start" indicates the discharge starting time. The period from “ON” to “start” corresponds to the preheating period, during which the voltage gradually increases, and when the discharge start voltage is reached, the discharge between the filaments F1 and F2 starts.
This makes it possible to suppress the sputtering of the filament at the time of starting the lighting by the filament preheating effect, thereby extending the lamp life.

In the example shown in FIG. 1, a capacitor 13 is housed in a base 12a (or 12b) when the discharge lamp 12 is manufactured. On the other hand, a discharge lamp 12 according to another embodiment of the present invention shown in FIG. 4 shows an example in which a capacitor 13 is arranged in an adapter 14a attached to one base 11a of a discharge lamp body 11. I have. In this case, the discharge lamp main body 11 itself is provided with the respective bases 11 at the manufacturing stage.
It may be manufactured as a total four-terminal type discharge lamp having two terminals at a and 11b. Then, an adapter 14a is attached to such a four-terminal type discharge lamp body 11, and a capacitor 13 is disposed inside the adapter 14a. In the adapter 14a, each filament F1, F2
One power supply terminal T1 and T2 for each filament connected to one end of the plug is inserted and exposed in a plug type.

For example, one base 11 of the discharge lamp body 11
a, one end of one filament F1 is connected to one plug type terminal T1 via the terminal of the base 11a, and the other end of the filament F1 is connected to one end of the capacitor 13 via the terminal of the base 11a. Connected. And the other base 11b of the discharge lamp body 11
Is not provided with a plug-type terminal, and one end of the other filament F2 is connected to a connection line 11d extending along the outside of the discharge lamp body 11 via a terminal of a base 11b. Connection line 11d
Through the plug-type terminal T2 provided on the other adapter 14a side. Also, the other filament F2
Is connected to the other end of the capacitor 13 inside the adapter 14a via a connection line 11e extending along the outside of the discharge lamp body 11 via the adapter 14b. In the drawing, the capacitor 13 is illustrated as being housed inside the adapter 14a, but may be housed inside the other adapter 14b.

FIG. 4 also shows a socket (not shown) in which the discharge lamp 12 having the adapter 14a is detachably mounted.
Is provided corresponding to one adapter 14a.
The number of wires of the wiring portion 30 extending from the socket (not shown) to the power supply circuit 20 is only two corresponding to the two terminals T1 and T2. The circuit configuration is the same as in FIG. Therefore,
It has a simple configuration with a minimum number of wires. Also,
In the configuration of FIG. 4 as well, since the capacitor 13 is housed inside the adapter 14a on the discharge lamp 12 side, the appearance of the discharge lamp 12 can be made compact and easy to handle. In the example of FIG. 4, no extra processing is required at the stage of manufacturing the discharge lamp body 11, and the completed discharge lamp body 1
1 when attaching the adapter 14a to the
Can be stored, so that there is an advantage that manufacturing is simple. Note that the present invention is not limited to the example in which the two plug-type terminals T1 and T2 are both provided on one adapter 14a, and the other plug-type terminal T2 may be provided on the other adapter 14b. In that case, a socket (not shown) to which the discharge lamp 12 is detachably mounted is provided corresponding to both adapters 14a and 14b.

FIG. 5 shows a discharge lamp device according to an embodiment of the present invention, in which the discharge lamp 12 itself is not provided with a capacitor 13 and the socket 1 to which the discharge lamp 12 is detachably mounted.
5 is provided with a capacitor 13. In this case, at both ends of the discharge lamp body 11 of the discharge lamp 12, adapters 14b and 14c are provided as in FIG. 4, but an adapter 14c which replaces the adapter 14a in FIG.
The adapter 14c is configured as a four-terminal plug so that it can be inserted into and removed from the socket 15 without providing the capacitor 13 therein. A capacitor 13 is provided inside the socket 15. When a four-terminal plug type adapter 14c attached to the discharge lamp body 11 is inserted into the socket 15, the filaments F1, F2 of the discharge lamp body 11 are inserted.
One power supply terminal T1, T2 for each filament connected to one end of the discharge lamp main body 11 is connected to two power supply lines of the wiring section 30, and connected to the other end of each filament F1, F2 of the discharge lamp body 11. The capacitor 13 is connected between T4. The number of wires of the wiring portion 30 extending from the socket 15 to the power supply circuit 20 is only two corresponding to the two terminals T1 and T2, and the circuit configuration of the discharge lamp system including the power supply circuit 20 is as follows. It is the same as FIG. Therefore,
It has a simple configuration with a minimum number of wires. Also,
In the configuration of FIG. 5 as well, since the capacitor 13 is housed inside the socket 15, the appearance of the discharge lamp 12 can be made compact and easy to handle.

As a modification of FIG. 5, as shown in FIG. 6, two sockets 15a and 15b are provided in the discharge lamp 12 without the adapters 14b and 14c.
May be provided corresponding to each of the bases 11a and 11b of the discharge lamp body 11. In that case, the capacitor 13
A connection line 11e is provided inside one of the sockets 15a (or 15b) to connect the capacitor 13 between the other ends of the filaments F1 and F2 of the discharge lamp body 11, as shown in the figure. Wiring. Even in this case,
The wiring section 30 extending from the sockets 15a and 15b to the power supply circuit 20 has only two wirings, and has a simple configuration in which the number of wirings is minimized. Also in the configuration of FIG. 6, since the capacitor 13 is housed inside the socket 15a (or 15b), the appearance of the discharge lamp 12 can be made compact and easy to handle.

FIG. 7 shows another embodiment of the present invention. FIG.
Is basically the same as the embodiment of FIG.
The only difference from FIG. 2 is that alternating current bypass capacitors C1 and C2 are provided for each filament F1 and F2 to bypass between one end and the other end of the filament F1 and F2. As described above, the AC current bypass capacitors C1, C2 are provided for each of the filaments F1, F2.
By providing C2, the current flowing directly to each of the filaments F1 and F2 at the time of starting the lighting can be suppressed, and the life of the filament can be further extended. The arrangement of these AC current bypass capacitors C1 and C2 is the same as in the example of FIG. 1, FIG. 4, FIG. 5 or FIG.
In the bases 12a and 12b, the adapters a and 14b, the socket 15, and the sockets 15a and 15b.

For example, in the case where the capacitor 13 is housed in the base 12a (or 12b) of the discharge lamp 12 as shown in FIG. 1, the AC current of the first filament F1 is changed as shown in FIG. A bypass capacitor C1 and an AC current bypass capacitor C2 for the second filament F2
Are preferably housed in one base 12 a of the discharge lamp 12. In this case, as shown in FIG.
If all the capacitors 13, C1 and C2 housed inside are mounted on the printed circuit board 16, the assembly work at the time of manufacturing becomes easy. As another example, as shown in FIG. 8C, the AC current bypass capacitor C1 of the first filament F1 is housed in one base 12a of the discharge lamp 12, and the AC current bypass capacitor C1 of the second filament F2 is housed. The capacitor C2 may be housed in the other base 12b of the discharge lamp 12.

Similarly to the above, as shown in FIG.
Of the capacitor 13 in the second adapter 14a (or 14b).
8A, both the AC current bypass capacitor C1 of the first filament F1 and the AC current bypass capacitor C2 of the second filament F2 are connected to one of the adapters of the discharge lamp 12, as in FIG. It is good to house in 14a (or 14b). Or, FIG.
Similarly, the AC current bypass capacitor C1 of the first filament F1 is connected to one of the adapters 14a of the discharge lamp 12.
And the capacitor C2 for AC current bypass of the second filament F2 is connected to the other adapter 14 of the discharge lamp 12.
b.

For example, in the case where the capacitor 13 is housed in the socket 15 as shown in FIG. 5, as shown in FIG. 9, the AC current bypass capacitor C1 of the first filament F1 and the second filament The AC current bypass capacitor C2 of F2 is housed in the socket 15. Similarly, as shown in the example of FIG.
In the case where the capacitor 13 is housed inside one of the a and 15b, the AC current bypass capacitor C1 of the first filament F1 is housed in one socket 15a,
The AC current bypass capacitor C2 of the second filament F2 may be housed in the other socket 15b of the discharge lamp 12.

In each of the embodiments, since each of the capacitors 13, C1 and C2 has a small capacity that is optimally determined in terms of design, it is compact in the base of the discharge lamp, in the adapter of the discharge lamp, or in the socket. It can be stored in In each of the embodiments, FIG.
Similarly to the example of (b), the capacitors 13 and C housed in the base of the discharge lamp, the adapter of the discharge lamp, or the socket.
By mounting 1, C2 on a printed circuit board, manufacturing and assembling work is facilitated, and it contributes to downsizing. The type of the discharge lamp to which the present invention is applied may be of any type, such as an ultraviolet discharge lamp or a fluorescent lamp, depending on the purpose of use.

[0021]

As described above, according to the present invention, in a discharge lamp including a pair of discharge filaments, one power supply terminal is provided for each filament connected to one end of each filament, and each filament is connected to one end of each filament. A discharge lamp, a discharge lamp device, or a discharge lamp system in which a capacitor is connected between the other ends of the filaments, so that the number of wires between the power supply circuit and the discharge lamp body is one power supply for each filament. While a minimum of two wires can be connected to the supply terminal, one power supply terminal, one end of one filament, the other end of the one filament, the capacitor, and the other Since a preheating current flows through the end, the other end of the other filament, and the other power supply terminal, the filament preheating effect suppresses sputtering at the start of lighting. It can be, it is possible to prolong the lamp life, an excellent effect that. Further, by providing an AC current bypass capacitor for each filament, the current flowing directly to each filament can be suppressed, and the life of the filament can be further extended. In addition, since the capacitor and the AC current bypass capacitor are configured to be housed in the base of the discharge lamp, the adapter of the discharge lamp, or the socket, the appearance of the discharge lamp can be made compact and easy to handle. Things.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a discharge lamp according to the present invention.

FIG. 2 is a schematic circuit diagram showing one embodiment of a discharge lamp system in which the discharge lamp according to the embodiment is connected to a power supply circuit.

FIG. 3 is a view exemplifying a voltage characteristic between filaments at the time of starting lighting in the embodiment.

FIG. 4 is a schematic sectional view showing another embodiment of the discharge lamp according to the present invention.

FIG. 5 is a schematic sectional view showing an embodiment of the discharge lamp device according to the present invention.

FIG. 6 is a schematic sectional view showing another embodiment of the discharge lamp device according to the present invention.

FIG. 7 is a schematic circuit diagram showing another embodiment of the discharge lamp system according to the present invention.

8 is a schematic sectional view showing an embodiment of a discharge lamp according to the present invention to which the circuit configuration of FIG. 7 is applied.

9 is a schematic cross-sectional view showing one embodiment of a discharge lamp device according to the present invention to which the circuit configuration of FIG. 7 is applied.

FIG. 10 is a schematic circuit diagram showing an example of a conventional discharge lamp system.

FIG. 11 is a schematic circuit diagram showing another example of a conventional discharge lamp system.

[Explanation of symbols]

 12 Discharge lamp F1, F2 Discharge filament T1, T2 Power supply terminal 11a, 11b, 12a, 12b Base 11d, 11e, 12d, 12e Connection line 12c Glass tube 13 Capacitor 14a, 14b Adapter 15, 15a, 15b Socket 20 Power supply Circuit 30 Wiring section C1, C2 AC current bypass capacitor

Claims (6)

[Claims] 1. A discharge lamp main body including a pair of discharge filaments, and a base provided on the discharge lamp main body, one power supply terminal for each filament connected to one end of each of the filaments. And a capacitor housed inside the base and connected between the other ends of the filaments. 2. A discharge lamp main body including a pair of discharge filaments, and an adapter attached to the discharge lamp main body, wherein one power supply terminal for each filament connected to one end of each filament is provided. A discharge lamp comprising: an exposed part; and a capacitor housed inside the adapter and connected between the other ends of the filaments. 3. A discharge lamp including a pair of discharge filaments, wherein the discharge lamp includes a terminal connected to each end of each of the filaments, and a socket to which the discharge lamp is detachably attached. One in which each terminal connected to one end of each filament of the discharge lamp is connected to a power supply line as a power supply terminal; and the terminal is housed inside the socket, A discharge lamp device comprising: a capacitor connected between terminals connected to the other ends of the filaments. 4. An AC current bypass capacitor for each filament, which bypasses between one end and the other end of the filament for each filament.
A discharge lamp or a discharge lamp device according to any one of claims 1 to 3. 5. The AC current bypass capacitor,
The discharge lamp or discharge lamp according to claim 4, wherein the discharge lamp or discharge lamp is housed inside a base of the discharge lamp body, inside an adapter attached to the discharge lamp body, or inside a socket to which the discharge lamp is detachably attached. Lighting device. 6. A discharge lamp or a discharge lamp device according to claim 1, a power supply line connected to one power supply terminal for each filament, and a power supply line. And a power supply circuit for supplying power to the discharge lamp via wiring.