JP2002334795A - Discharge lamp, discharge lamp device and discharge lamp system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a common ballast in discharge lamps having different ratings without shortening a filament life. SOLUTION: This discharge lamp is provided with a discharge lamp body 40 including a pair of discharging filaments F1 and F2, and alternating current bypassing capacitors C1 and C2 for the respective filaments for bypassing the alternating current between the one-side end of the filament and the other-side end thereof.

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 FIG. 10 shows an example of a conventional four-terminal type ultraviolet discharge lamp 9 and a power supply circuit 20 associated therewith.
Power supply terminals T1 and T2 are provided at one end of each of the pair of discharge filaments F1 and F2, and terminals T3 and T4 are provided at the other end of each of the filaments F1 and F2. Terminals T1, T2 and terminal T
3, the power supply circuit 20 is attached to and detached from the power supply circuit 20 via T4. The power supply circuit 20 includes, for example, a DC converter 22 that converts a power supply from a commercial AC power supply 21 into a DC voltage, an inverter circuit 23 that converts the DC voltage into a predetermined high-frequency voltage, a choke coil 24, and a capacitor 25. And a ballast comprising a series resonance circuit. In general,
In an ultraviolet disinfection device or a disinfection device, the power supply circuit 20 is disposed on the side of the control panel separated from the ultraviolet discharge lamp 9, and connected to the power supply terminals T 1 and T 2 of the discharge lamp 9 via the wiring portion 30. Supply discharge current. In this case, the discharge current is determined by the capacitor 25 forming a series resonance circuit together with the choke coil 24, and the discharge current is supplied to the filaments F1, F2 via the power supply terminals T1, T2.
Is applied directly to Usually, the ballast is designed according to the rating of the discharge lamp used, and the rated current of the discharge lamp controlled by the ballast is adapted. If a discharge current exceeding the rated current flows through the discharge lamp using a ballast that does not match the rating of the discharge lamp, the filament of the discharge lamp is easily consumed and the filament life is shortened.
Conventionally, it has been virtually impossible to use a ballast that does not meet the rating of the discharge lamp. Therefore, it is necessary to design and manufacture a ballast individually for each rating of each discharge lamp, which is costly. Similar problems are not limited to ultraviolet discharge lamps,
This can also occur with other discharge lamps.

[0003] Another discharge lamp 1 of a four-terminal type.
As shown in FIG. 11, 1 in the discharge lamp 11
Not only are the power supply terminals T1 and T2 provided at one end of each of the pair of discharge filaments F1 and F2, but also the preheating terminals T5 and T6 are provided at the other end of each filament F1 and F2. used. The preheating terminals T5 and T6 are connected to the secondary side of the preheating transformer 26 on the power supply circuit 20 side via the wiring section 30. In such a four-terminal type discharge lamp 11, the filaments F1 and F2 are preheated at the start of lighting, so that sputtering can be prevented and the lamp life can be extended. On the other hand, the preheating transformer 26 must be provided on the side of the power supply circuit 20, so that the configuration of the apparatus itself is complicated and the cost is increased. Also, power supply terminals T1,
A discharge current determined by a capacitor 25 forming a series resonance circuit together with the choke coil 24 is supplied to T2.
Since the discharge current is directly applied to each of the filaments F1 and F2, the same problem as described above occurs. The same problem can occur not only in the ultraviolet discharge lamp but also in other discharge lamps.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and has been made in view of the above circumstances, and has been made so that a common ballast can be used for discharge lamps having different ratings without shortening the filament life. And a discharge lamp device and a discharge lamp system.

[0005]

A discharge lamp according to the present invention comprises a discharge lamp body including a pair of discharge filaments, a discharge lamp body for each of the filaments, and a bypass between one end and the other end of the filament. And an AC current bypass capacitor. According to this, even if a discharge current exceeding the rating of the discharge lamp is supplied from the ballast, the flow of current to the filament is bypassed by the bypass capacitor, so that the consumption of the filament can be prevented. The life can be properly maintained. Therefore, a common ballast can be shared by discharge lamps having different ratings, so that it is possible to save time and effort in designing and manufacturing the ballast, thereby reducing costs. At least one of the AC current bypass capacitors described above is connected to the inside of a base provided in the discharge lamp body, the inside of an adapter attached to the discharge lamp body, or the inside of a socket to which the discharge lamp is detachably attached. May be provided.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of a discharge lamp 41 according to the present invention.
Glass tube 42c and bases 4 provided at both ends thereof
2a and 42b and a pair of discharge filaments F1 and F2 provided therein. In one of the bases 42a, one power supply terminal T1 connected to one end of the filament F1 and one terminal T3 connected to the other end of the filament F1 are provided to be exposed in a plug-in type. I have. Further, in the other base 42b, one power supply terminal T2 connected to one end of the filament F2 and one terminal T4 connected to the other end of the filament F2 are provided to be inserted and plugged, respectively. Have been. In each base 42a, 42b,
AC current bypass capacitors C1 and C2 are inserted and connected to bypass between one end and the other end of each of the filaments F1 and F2.
a, 42b. That is, in one base 42a, one end of the filament F1 is connected to one end of the capacitor C1 via the internal connection, and the other end of the filament F1 is connected to the capacitor C1 via the internal connection.
1 to the other end. In the other base 42b, one end of the filament F2 is connected to one end of the capacitor C2 via an internal connection, and the other end of the filament F2 is connected to the other end of the capacitor C2 via an internal connection. The capacitances of the capacitors C1 and C2 are the same.

In the case of FIG. 1, a socket (not shown) to which the discharge lamp 41 is detachably mounted is provided with both bases 42a and 42a.
It is provided corresponding to the side of b. The number of wires of the wiring portion 30 extending from this socket (not shown) to the power supply circuit 20 shown in FIG. 2 is four corresponding to the four terminals T1 to T4. In the configuration of FIG. 1, since the capacitors C1 and C2 are housed inside the bases 42a and 42b of the discharge lamp 41, the appearance of the discharge lamp 41 can be made compact and easy to handle.

FIG. 2 shows that the discharge lamp 41 is connected to a power supply circuit 2.
1 shows an example of an electric circuit of a discharge lamp system connected to 0.
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.
An inverter circuit 23 for converting the DC voltage into a predetermined high-frequency voltage; a choke coil 24 and a capacitor 1
3 and a ballast comprising a series resonance circuit. The capacitor 13 forming a series resonance circuit together with the choke coil 24 is connected to each filament F1, F2 in the discharge lamp 41.
To be connected between the terminals T3 and T4 on the other end side.

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 4.
At the time of lighting and starting to supply power to the power supply 1, one power supply terminal T 1, one AC current bypass capacitor C 1, one terminal T 3, through the capacitor 13, the other terminal T 4, and the other AC current bypass A discharge current flows through a route that passes through the capacitor C2 and the other power supply terminal T2. Thus, the filament F1,
By providing the AC current bypass capacitors C1 and C2 for each of the filaments F2, the filaments F1 and F2 can be turned on at the start of lighting.
2 can be suppressed. Thus, the current directly applied to each of the filaments F1 and F2 at the time of starting the lighting is suppressed, and the life of the filaments F1 and F2 can be further extended. Further, the filaments F1 and F2 are preheated based on the discharge current flowing through the series resonance circuit including the choke coil 24 and the capacitor 13, so that the filament preheating effect can suppress the sputtering at the time of starting the lighting, and the lamp life Can be extended. When the potential difference between the filaments F1 and F2 in the discharge lamp 41 reaches a predetermined discharge start voltage, discharge starts.

In FIG. 1, the capacitors C1 and C2 are separately housed in the bases 42a and 42b. However, the capacitors C1 and C2 are housed together in one of the bases 42a (or the base 42b). You may. As shown in FIG. 3, in one base 42a, one power supply terminal T1 and one terminal T3 respectively connected to one end and the other end of one filament F1 are provided in a plug-type manner. And one power supply terminal T connected to one end and the other end of the other filament F2.
2 and one terminal T4 are provided to be exposed in a plug-in type, respectively. That is, one end and the other end of one filament F1 are connected to the terminals T1 and T3 via the connection inside the base 42a, and one end and the other end of the other filament F2 respectively extend along the outside of the glass tube 42c. Base 4 through connection lines 42d and 42e
It is connected to terminals T2 and T4 provided on the side of 2a. Capacitors C1 and C2 are inserted and connected between one end and the other end of each of the filaments F1 and F2 via internal connections.

A discharge lamp 41 according to another embodiment of the present invention shown in FIG. 4 includes two bases 42a, 42 of a discharge lamp body 40.
An example is shown in which capacitors C1 and C2 are arranged in adapters 43a and 43b attached to 2b. In this case, the discharge lamp 41 itself may be manufactured as a four-terminal type discharge lamp having two terminals in each of the bases 42a and 42b at the manufacturing stage. An adapter 43 is attached to such a four-terminal type discharge lamp body 40.
a, 43b, and these adapters 43a, 43b
, Capacitors C1 and C2 are respectively arranged. In each adapter 43a, 43b, each filament F1, F
The terminals T1 and T3 and the terminals T2 and T4 of each filament connected to one end and the other end of the plug 2 are inserted and exposed in a plug type.

For example, one base 42 of the discharge lamp body 40
a, one end of one filament F1 is connected to one plug type terminal T1 via one terminal of the base 42a, and the filament F1 is connected to the other end of the filament F1.
Is connected to the other plug-type terminal T3 via the other terminal of the base 42a. Then, one end and the other end of the filament F1 are connected to the capacitor C1 via both terminals of the base 42a. In the adapter 43b attached to the other base 42b of the discharge lamp main body 40, one end of the other filament F2 is connected to one plug type terminal T2 via one terminal of the base 42b, and the other end of the filament F2 is connected to the other end. The other terminal of the base 42b is connected to the other plug-type terminal T4. One end and the other end of the filament F2 are connected to the capacitor C2 via both terminals of the base 42b.

In the case of FIG. 4, similarly to the discharge lamp 41 shown in FIG. 1, a socket (not shown) to which the discharge lamp 41 is detachably mounted corresponds to both adapters 43a and 43b. Provided. The number of wires of the wiring portion 30 extending from the socket (not shown) to the power supply circuit 20 is four corresponding to the four terminals T1 to T4, and the circuit of the discharge lamp system including the power supply circuit 20 is also provided. The configuration is the same as in FIG. Also, in the configuration of FIG. 4, since the capacitors C1 and C2 are housed inside the adapters 43a and 43b, the appearance of the discharge lamp 41 can be made compact.
It becomes easy to handle. In the example of FIG.
No extra processing is required at the stage of manufacturing the 0, and the capacitors C1 and C2 may be housed when the adapters 43a and 43b are attached to the completed discharge lamp body 40, so that there is an advantage that the manufacturing is simple.

A discharge lamp 41 according to another embodiment of the present invention shown in FIG. 5 has capacitors C1 and C2 in an adapter 43c attached to one base 42a of the discharge lamp body 40.
The example which arrange | positions is shown. Also in this case, the discharge lamp 41 itself is in the manufacturing stage, and each of the bases 42a, 42
It may be manufactured as a total four-terminal type discharge lamp having two terminals at b. Then, the adapters 43c and 43d are attached to the four-terminal type discharge lamp body 40, and either one of the adapters 43c (or the adapter 4c) is attached.
The capacitors C1 and C2 are arranged inside 3d). In each of the adapters 43c and 43d, the terminals T1 and T3 and the terminals T2 and T4 of each filament connected to one end and the other end of the filaments F1 and F2 are inserted and exposed in a plug type.

For example, one base 42 of the discharge lamp body 40
a, one end of one filament F1 is connected to one plug type terminal T1 via one terminal of the base 42a, and the filament F1 is connected to the other end of the filament F1.
Is connected to the other plug-type terminal T3 via the other terminal of the base 42a. Then, one end and the other end of the filament F1 are respectively connected to the capacitor C1 via the connection inside the adapter 43c. The adapter 43d attached to the other base 42b of the discharge lamp body 40 has no plug-type terminal, and the other filament F2
Of the discharge lamp body 4 via one terminal of the base 42b.
It is connected to a connection line 43e extending along the outside of 0, and further connected to a plug-type terminal T2 provided on the adapter 43c via the connection line 43e. The other end of the other filament F2 is connected to a connection line 43f extending along the outside of the discharge lamp main body 40 via the other terminal of the base 42b, and further provided to the adapter 43c via the connection line 43f. Connects to plug type terminal T4. Then, one end and the other end of the filament F2 are respectively connected to the capacitor C2 via the connection inside the adapter 43c.

In the case of FIG. 5, a socket (not shown) to which the discharge lamp 41 is detachably mounted is connected to one of the adapters 43.
It is provided corresponding to the side of c. The number of wires of the wiring portion 30 extending from the socket (not shown) to the power supply circuit 20 is four corresponding to the four terminals T1 to T4, and the circuit of the discharge lamp system including the power supply circuit 20 is also provided. The configuration is
It is the same as FIG. Also, in the configuration shown in FIG. 5, since the capacitors C1 and C2 are housed inside the adapter 43c, the external appearance of the discharge lamp 41 can be made compact and easy to handle. Also in the example of FIG. 5, no extra processing is required at the stage of manufacturing the discharge lamp main body 40, and the capacitors C1 and C2 may be stored when the adapter 43c is attached to the completed discharge lamp main body 40. Also has the advantage of being simple.

The discharge lamp device according to the embodiment of the present invention shown in FIG.
And the capacitors C1 and C2 are provided on the side of the socket 44 to which the discharge lamp 41 is detachably attached. In this case, the discharge lamp body 40 of the discharge lamp 41
5 are provided with adapters 43d and 43g in the same manner as in FIG. 5, but an adapter 4d instead of the adapter 43c in FIG.
The adapter 43g is configured as a four-terminal plug so that it can be inserted into and removed from the socket 44 without providing the capacitors C1 and C2 in 3g. Capacitors C1 and C2 are provided inside the socket 44, and the discharge lamp body 4
When a four-terminal plug-type adapter 43g attached to the discharge lamp body 40 is inserted into the socket 44, a power supply terminal T1 connected to one end of one filament F1 of the discharge lamp body 40 is connected via one power supply line of the wiring section 30. Capacitor C1
And a terminal T3 connected to the other end of the filament F1 is connected to the other end of the capacitor C1 via one wire of the wiring portion 30. Also, the discharge lamp body 40
A power supply terminal T2 connected to one end of the other filament F2 is connected to one end of a capacitor C2 via the remaining one power supply line of the wiring section 30, and the filament F
The terminal T4 connected to the other end of the wiring part 30 is
It is connected to the other end of the capacitor C2 via this wiring. The number of wirings of the wiring portion 30 extending from the socket 44 to the power supply circuit 20 is four corresponding to the four terminals T1 to T4, and the circuit configuration of the discharge lamp system including the power supply circuit 20 is shown in FIG. Same as 2. Also in the configuration of FIG. 6, since the capacitors C1 and C2 are housed inside the socket 44, the appearance of the discharge lamp 41 can be made compact and easy to handle.

As a modification of FIG. 6, as shown in FIG. 7, two sockets 44a and 44b are connected to the discharge lamp 41 without the adapters 43d and 43g.
May be provided corresponding to the respective bases 42a and 42b of the discharge lamp main body 40. In that case, the capacitors C1, C
2 is provided inside both sockets 44a and 44b. That is, in the socket 44a, the capacitor C1
Is provided so as to connect one end and the other end of one filament F1 of the discharge lamp body 40, respectively. Socket 4
In 4b, the capacitor C2 is provided so as to connect one end and the other end of the other filament F2 of the discharge lamp body 40, respectively. Even in this case, since the capacitors C1 and C2 are housed inside the sockets 44a and 44b, the appearance of the discharge lamp 41 can be made compact and easy to handle.

FIG. 8 shows another embodiment of the present invention. FIG.
Is basically the same as the embodiment of FIG.
2 only in that one of the capacitors C1 and C2 provided for each filament F1 and F2 of the discharge lamp 41 is provided on the power supply circuit 20 side. As shown in the drawing, one end of a capacitor C1 is connected to an internal wiring 27a connected to a power supply terminal T1 connected to one end of one filament F1 of the discharge lamp 41, and a terminal connected to the other end of the filament F1. The other end of the capacitor C1 is connected to an internal wiring 27b connected to T3. As described above, on the power supply circuit 20 side, the AC current bypass capacitor C1 that bypasses between one end and the other end of one filament F1 of the discharge lamp 41 is provided.
2, the currents flowing directly to the filaments F1 and F2 at the time of starting the lighting can be suppressed by the AC current bypass capacitors C1 and C2 as in the case of FIG. 2, and the filament life can be further extended. .

FIG. 9 shows still another embodiment of the present invention. The example of FIG. 9 has the same basic configuration as that of the embodiment of FIG. The only difference from FIG. Primary winding Tr of transformer T
1 is connected in series to the resonance capacitor 13, and a detection signal induced in the secondary winding Tr <b> 2 of the transformer T is input to the dimming control circuit 28. The winding C is connected in series between the power supply terminal T2 of the discharge lamp 41 and the inverter circuit 23. The winding C is a primary winding Tr1 of the transformer T.
And the winding directions are in opposite phases. The electromotive force generated in the primary winding Tr1 is canceled by the winding C having the opposite phase. With this configuration, when a power switch (not shown) provided on the side of the power supply circuit 20 is turned on to supply power to the discharge lamp 41, the primary winding Tr of the transformer T
An induced voltage is generated in the secondary winding Tr2 in accordance with the current flowing in 1, and a discharge current detection signal is given to the dimming control circuit 28. The dimming control circuit 28 controls the dimming of the discharge lamp 41 by controlling the inverter circuit 23 according to the discharge current detection signal.

In each of the embodiments, since each of the capacitors C1 and C2 has a small capacity which is optimally determined in design, it is compactly housed in a base of a discharge lamp, an adapter of a discharge lamp or a socket. Is what you can do. Further, a case where the capacitors C1 and C2 are housed in the base 42a of the discharge lamp 41 as shown in FIG.
The case of accommodating in the adapter 43c of the discharge lamp 41 as in the example of FIG.
When the capacitors C1 and C2 are mounted on a printed circuit board, the manufacturing and assembling work is facilitated, and the size is reduced. 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.

[0022]

As described above, according to the present invention, a discharge lamp body including a pair of discharge filaments, and one end of each of the filaments is bypassed for each of the filaments.
Since it has an AC current bypass capacitor for each filament, without shortening the filament life,
This has an excellent effect that a common ballast can be used for discharge lamps having different ratings.

[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 schematic sectional view showing a modification of the discharge lamp according to FIG. 1;

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 a modification of the discharge lamp according to FIG. 4;

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

FIG. 7 is a schematic sectional view showing another embodiment of the discharge lamp device according to the present invention.

FIG. 8 is a schematic circuit diagram showing another embodiment of the discharge lamp system according to the present invention.

FIG. 9 is a schematic circuit diagram showing still another embodiment of the discharge lamp system according to the present invention.

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.

[Description of References] C1, C2 AC current bypass capacitors F1, F2 Discharge filaments T1, T2 Power supply terminals T3, T4 terminals 20 Power supply circuit 28 Dimming control circuit 30 Wiring unit 40 Discharge lamp body 41 Discharge lamp 42a , 42b Base 42c Glass tube 42d, 42e, 43e, 43f Connection line 13 Resonance capacitor 43a, 43b, 43c, 43d, 43g Adapter 44, 44a, 44b Socket

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 3K014 AA02 BA02 BA04 DA01 DA04 EA04 HA03 HA04 LA04 3K072 AA02 AB09 AC02 AC11 BC01 CA16 DB01 DB03 DC02 DC07 DD04 DE02 GB01 HB03

Claims (5)

[Claims] A discharge lamp comprising: a discharge lamp body including a pair of discharge filaments; and an AC current bypass capacitor for each filament, which bypasses between one end and the other end of the filament. . 2. The discharge lamp according to claim 1, wherein at least one of the AC current bypass capacitors is accommodated in a base provided in the discharge lamp body. 3. The discharge lamp according to claim 1, further comprising an adapter attached to the discharge lamp main body, wherein at least one of the AC current bypass capacitors is housed inside the adapter. 4. The discharge lamp according to claim 1, further comprising: a socket to which the discharge lamp is detachably attached, wherein at least one of the AC current bypass capacitors is provided inside the socket. Is a discharge lamp device. 5. The discharge lamp or the 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, wherein at least one of the AC current bypass capacitors is housed on a side of the power supply circuit.