JPH0582269A - Discharge lamp lighting device and illuminating device - Google Patents

Abstract

PURPOSE:To prevent breakage of a discharge lamp caused by overcurrent even if an electric power supply line from an alternating current power supply is connected falsely to the illuminating equipment side in a discharge lamp lighting device and an illuminating device provided with a pulse generating circuit arranged separately from a ballast. CONSTITUTION:Three-wire wiring is carried out between a ballast block A and an illuminating equipment B, and switch means (51 and 52) which are operated by using voltage outputted from two wires among the three output wires of the ballast block A and control an electric power supply to the pulse generating circuit 3 side from an alternating current power supply 1 outputted through the other two wires among the three output wires by switching on/off, are arranged on the illuminating equipment B side. Thereby, only when wiring is carried out correctly, the alternating current power supply is carried out to the pulse generating circuit 3, and a discharge lamp 4 is lit up, and when the two-wire electric power supply line of the alternating current power supply is wired falsely to the illuminating equipment B side without passing through the ballast block A, the alternating current power supply to the pulse generating circuit 3 is cut off. Thereby, breakage of the discharge lamp 4 caused by false wiring can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device and a lighting device, and more particularly to a mercury lamp, a metal halide lamp,
The present invention relates to a discharge lamp lighting device and a lighting device, which prevent damage to a discharge lamp caused by incorrect wiring of a power line in a lighting device for a high pressure discharge lamp such as a high pressure sodium lamp.

[0002]

2. Description of the Related Art In general, a lighting device for a high pressure discharge lamp is shown in FIG.
As shown in (1), it comprises an AC power supply 1, a ballast 2, a pulse generation circuit 3 for generating a pulse for starting a discharge lamp, and a discharge lamp 4. A power switch SW is arranged near the AC power supply 1. In such a discharge lamp lighting device, the ballast 2 and the pulse generating circuit 3 are separately arranged and the ballast 2 and the pulse generating circuit 3 are integrally arranged as shown in FIG. There is.

In recent years, lighting equipment using a high-pressure discharge lamp as described above has come to be used as means for illuminating products in spots in stores and the like. In such a spot lighting fixture, a lighting fixture may be mounted by providing a hole in the ceiling, and in this case, it is necessary to place a pulse generating circuit and a ballast in one place inside the ceiling in a large space. .. Therefore, as shown in FIG. 4, the pulse generating circuit 3 and the ballast 2 are separately arranged, and the pulse generating circuit 3 is placed near the high pressure discharge lamp 4 (the pulse generating circuit 3 is separated from the high pressure discharge lamp 4). Since the generated pulse is attenuated by the wiring when placed, the ballast 2 having a large space is placed at a place distant from them. (If a plurality of high-pressure discharge lamps are used, a plurality of ballasts are arranged at one place.) Therefore, in FIG. 4, the pulse generation circuit 3 and the discharge lamp 4 are combined as a lighting fixture B, while the ballast 2 Are included in ballast block A.

By the way, in the case where the lighting fixture side including the pulse generating circuit and the high pressure discharge lamp and the ballast are separated from each other, there are the following problems. In FIG. 4, the power supply lines at both ends of the AC power supply 1 are connected to the input terminals a and a'of the ballast block A including the ballast 2, and the both ends on the output side of the ballast block A are the pulse generating circuit 3 and the high pressure discharge lamp. Four
Is connected to the input terminals b and b'of the luminaire B.
Here, the ballast block A and the luminaire B are wired separately in a store or the like as described above. When making such wiring, the operator needs
There is a possibility that the power supply line of the book may be directly led to the input terminals b and b ′ of the lighting fixture B without passing through the ballast block A. If the lighting device B is directly connected without passing through the ballast 2 as described above, the pulse generation circuit 3 operates to start the lighting of the discharge lamp 4, and an excessive current instantaneously flows due to the negative resistance characteristic of the discharge lamp 4, The high pressure discharge lamp 4 is destroyed.
At times, the discharge lamp burst and was dangerous.

[0005]

As described above, in the past,
Since the ballast block and the luminaire have two-wire wiring, there is a problem that the power lines from both ends of the AC power source are directly wired to the luminaire without passing through the ballast block.

In view of the above, the present invention relates to a discharge lamp lighting device and a lighting device in which a ballast is arranged away from a lighting fixture including a discharge lamp and a pulse generation circuit, and a wiring error such as a power supply line occurs and a discharge caused by the wiring error occurs. An object of the present invention is to provide a discharge lamp lighting device and a lighting device capable of preventing the destruction of an electric lamp.

[0007]

The invention according to claim 1 is
Including a ballast, the input side has two input parts for connecting the two power lines from the AC power source, while the output side has three output lines, two with the same potential and one with different potential. It operates by using the voltage outputted from the ballast block having the drawn-out configuration and the two lines having different potentials among the three output lines of the ballast block, and the other of the three output lines. Switch means for controlling ON / OFF of the output voltage from the ballast block, which is supplied through the two wires, and a pulse for operating the output voltage supplied through the switch means to generate a high voltage pulse for starting the discharge lamp. It is characterized by comprising a generating circuit and a discharge lamp which is lit by a voltage supplied through the pulse generating circuit.

According to a second aspect of the present invention, a ballast is provided, and two input parts for connecting two power source lines from an AC power source are provided on the input side, while two output lines are drawn to the output side. With the ballast block of the configuration, the pulse generator circuit that operates at the voltage supplied through the output line of this ballast block, and generates the high-voltage pulse for starting the discharge lamp, and the voltage supplied through this pulse generator circuit. A discharge lamp that is lit,
This discharge lamp is provided in series with a fuse that blows when the discharge lamp current exceeds a predetermined value.

According to a third aspect of the present invention, the lighting fixture includes a discharge lamp, the switch means and the pulse generating circuit according to the first aspect, and the ballast block according to the first aspect is arranged separately from the lighting fixture. It is characterized by having done.

According to a fourth aspect of the invention, the lighting fixture includes a discharge lamp, the pulse generating circuit and the fuse according to the second aspect, and the ballast block according to the second aspect is arranged separately from the lighting fixture. It is characterized by that.

[0011]

According to the first aspect of the present invention, since the wire between the ballast block and the pulse generating circuit is made into a three-wire wiring by using the switch means, the two-wire power supply line from the AC power supply is not connected to the ballast block. There is no risk of connection to the drawing pulse generation circuit side. In addition, the switch means can detect the voltage only when it is wired correctly and can operate the pulse generating circuit by closing the contact, and if the wiring is incorrect, the pulse generating circuit does not operate. There is no risk of destroying the discharge lamp.

In the second aspect of the present invention, since the protective fuse is provided in series with the discharge lamp on the side of the pulse generating circuit, the power line from the AC power source is erroneously connected to the pulse generating circuit without passing through the ballast block. As a result, even if the pulse generating circuit operates and an excessive current flows through the discharge lamp, the fuse is blown and the discharge lamp can be protected.

[0013]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a block diagram showing a discharge lamp lighting device and a lighting device according to an embodiment of the present invention.

In FIG. 1, two power supply lines from both ends of the AC power supply 1 are connected to two input terminals a and a'of the ballast block A, respectively. In the ballast block A, one input terminal a is connected to one end of the ballast 2, and two output lines are drawn from the output end of the ballast 2. Also,
The line connected to the other input terminal a'of the ballast block A is directly drawn out as an output line. Therefore, three lines are drawn out from the ballast block A. The three lines drawn from the ballast block A are respectively connected to the three input terminals b, b ″, b ′ of the luminaire B. The input terminals b, b ″ are the output terminals of the ballast 2. From the input terminal a'of the ballast block A is connected to the input terminal b '.
The luminaire B includes a relay including a relay drive unit 51 and a relay contact 52, a pulse generation circuit 3, and a discharge lamp 4. A relay driver 51 is connected between the input terminal b ″ and the input terminal b ′, and a relay contact 52 is inserted in series in the line between the input terminal b and the pulse generation circuit 3.
The pulse generating circuit 3 is turned on / off by turning on / off the relay contact 52.
Also, the power supply to the discharge lamp 4 can be turned on and off.

When the power switch SW is turned on in the properly connected state as shown in FIG. 1, the voltage from the AC power source 1 is supplied to the relay drive section 51 and the relay contact 52 is turned on. Therefore, the pulse generation circuit 3 operates to generate a high-voltage pulse and turn on the discharge lamp 4.

By the way, when wiring in the state of FIG.
The operator mistakenly connected the two power lines at both ends of the AC power source 1 directly to the input terminal b of the lighting fixture B without passing through the ballast block A,
If two are connected to either b ′ or b ″, the voltage is supplied only to two of the three input terminals b, b ′, and b ″ of the luminaire B. The power supply voltage is not supplied to the pulse generation circuit 3 because the section 51 does not operate and the relay contact 52 does not turn on, or the power supply voltage generates a pulse even when the relay drive section 51 operates and the relay contact 52 turns on. Discharge lamp 4 not supplied to circuit 3
There is no lamp current flowing through. Therefore, if the wiring is incorrect, the discharge lamp 4 does not light up and is not damaged.

FIG. 2 is a block diagram showing a modification of FIG. In this figure, 3 between ballast block A and luminaire B
The drawing configuration is changed, and the input terminal a ′ of the ballast block A is connected to the input terminal b ′ of the lighting fixture B, while the input terminal b ″ is connected to the input terminal b ″ of the lighting fixture B. The relay drive unit 51 is connected between b.

FIG. 3 is a block diagram showing another embodiment of the present invention. In the embodiment of FIG. 3, a fuse 6 is provided in the luminaire B in the conventional example of FIG. 4 in series with the discharge lamp 4 so as to blow when an excessive current exceeding the rated current flows. If this is done, ballast block A will be
Even if both ends of the AC power supply 1 are directly connected to the input terminals b and b ′ of the lighting fixture B without the intervention of the pulse generator 3 and the pulse generating circuit 3 operates as a result, if an excessive current of a predetermined value or more flows in the discharge lamp 4, The fuse 6 can be blown to protect the discharge lamp 4 from damage.

[0019]

As described above, according to the present invention, in the discharge lamp lighting device in which the ballast and the pulse generating circuit are separately arranged, the pulse generating circuit does not have the AC power supply line through the ballast. Even if it is erroneously connected to the side, the discharge lamp can be prevented from being destroyed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a discharge lamp lighting device and a lighting device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a modified example of FIG.

FIG. 3 is a block diagram showing a discharge lamp lighting device and a lighting device according to another embodiment of the present invention.

FIG. 4 is a block diagram showing a conventional discharge lamp lighting device and a conventional lighting device.

[Explanation of symbols]

 1 AC power supply 2 Ballast 3 Pulse generation circuit 4 Discharge lamp 6 Fuse 51 Relay drive unit 52 Relay contact A Ballast block B Lighting equipment

Claims (4)

[Claims] 1. A ballast, which includes a ballast and is connected to an input side of an AC power source.
Ballast block having two input parts for connecting two power supply lines, and three output lines with two lines having the same potential and one line having different potential on the output side, and this ballast block Of the three output lines of the ballast block which are operated by using the voltages output from the two lines having different potentials and are supplied through the other two lines of the three output lines. A switch means for controlling on / off of the output voltage, a pulse generation circuit which operates at an output voltage supplied through the switch means and generates a high-voltage pulse for starting a discharge lamp, and a voltage supplied through the pulse generation circuit A discharge lamp lighting device, comprising: 2. A ballast including a ballast, which is connected to an input side of an AC power source.
A ballast block having two input sections for connecting two power supply lines, and two output lines drawn to the output side, and a voltage supplied through the output line of the ballast block, A pulse generation circuit that generates a high-voltage pulse for starting the discharge lamp, a discharge lamp that is lit by the voltage supplied through the pulse generation circuit, and a discharge lamp current that exceeds the specified value are provided in series with this discharge lamp. A discharge lamp lighting device, comprising: a fuse that blows when it is turned on. 3. The lighting fixture comprises a discharge lamp, the switch means and the pulse generating circuit according to claim 1, and the ballast block according to claim 1 is arranged separately from the lighting fixture. Lighting equipment. 4. A lighting device comprising a discharge lamp, a pulse generating circuit and a fuse according to claim 2, and the ballast block according to claim 2 being arranged apart from the lighting device. apparatus.