JPS59211999A - Device for firing discharge lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a lighting device for a discharge lamp arranged in a showcase, and more particularly to a lighting device for a discharge lamp equipped with a dimmer.

(B) Prior Art Conventionally, for example, in a refrigerated showcase, the dimmers for the discharge lamps installed inside and outside the refrigerator were installed in a distribution board in the supermarket where the showcase was installed, for example, in the management room. In particular, the dimmer is installed on the distribution side of the molded circuit breaker, which is a branch circuit in the distribution board, to the showcase. Here, the dimmer is provided with a timer mechanism that delays dimming, and by turning on the circuit breaker, the timer mechanism starts operating and dims the discharge lamp of the lamp for a predetermined period of time. I was delaying things. However, the timer mechanism does not work in conjunction with turning on and off the lighting switch of the showcase (the lighting switch is turned on only after the timer mechanism times up and the light control device enters the dimming state). When this occurs, the timer mechanism does not operate and the timer mechanism does not operate when the light switch is turned on again after time has elapsed and the temperature of the tube wall of the discharge lamp has decreased. Electric lights become dimmable, resulting in poor lighting performance (it takes a long time to turn on, a decrease in illuminance, flickering, etc.), and the radioactive material coated on the filament inside the discharge lamp scatters. The amount of the discharge lamp increases, resulting in a disadvantage that the life of the discharge lamp is shortened.

(c) Purpose of the Invention To prevent the occurrence of deterioration in lighting performance, decrease in illuminance, and decrease in life of discharge lamps caused by dimming being performed immediately when lighting a discharge lamp arranged in a low-temperature showcase. It is in.

B) Structure of the Invention The present invention provides an internal and external discharge lamp disposed in a low-temperature showcase, a ballast and a lighting tube connected in parallel to the discharge lamp, and a supply of electric power to the discharge lamp. a lighting switch that is connected to an AC power source and switches the discharge lamp on and off, and a bidirectional element that controls the phase of power supplied to the discharge lamp;
a timer mechanism that is energized when at least the interior discharge lamp is turned on and delays dimming of at least the interior discharge lamp among the discharge lamps for a predetermined period of time; A discharge lamp lighting device equipped with a dimmer device equipped with a pulse generation circuit that controls turning off, which reliably prevents deterioration of lighting performance, decrease in illuminance, occurrence of flickering, etc. when lighting a discharge lamp. This prevents the discharge lamp from having a short lifespan.

(E) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. ( ) is a refrigerated oven showcase shown as a low-temperature showcase.The main body (2) has a U-shaped cross section, has an opening (3) on the front, and has a plurality of shelves (4) installed inside the refrigerator. ... and the front end of the ceiling wall are provided with internal discharge lamps (hereinafter referred to as internal lights) (5), respectively. In addition, a small number of external discharge lamps (hereinafter referred to as external lamps 5) (6) are arranged in the second part of the opening (3).

FIG. 2 shows a discharge lamp lighting device shown as an embodiment of the present invention, in which only one interior light is shown and illustrations of other interior lights connected in parallel are omitted.

A lighting tube (7) is connected in parallel to the interior light (5) and exterior light (6).
, (8) and first and second ballasts (9), 00) are connected.

(11) is a light control device that controls the phase of the current flowing to the interior light (5) and the exterior light (6) to control the light, and is a bidirectional, sex element (hereinafter referred to as the product name TRIAC). Q21
and a pulse generating circuit Q4 that controls the on/off of a timer mechanism (131 and triac Q2) that operates the triac (+21) when a predetermined time, for example, 20 minutes has elapsed after energization. Here, the first electrode (6A) of the TRIAC Q bottle i outside light (6) and the first ballast (
9) Between.

This triac (121 games) (1
2A) is a triac by controlling the ON point of triac Q21.

A pulse generation circuit Q41 is connected to control the light inside the refrigerator (5) and the outside light (6) by controlling the conduction angle of zero, and the anode (12A) is further connected to the second ballast QQ. ing. Further, one end of the timer mechanism (13) is connected to the eleventh second ballast (9), the middle point (9A) of the mouse, (IO
A) and AC power supply (+51 one output terminal (15A)
The other end is connected to a light switch, which will be described later. (+6) is a lighting switch that controls the lighting state of the interior light (5) and the exterior light (6), and is connected to the other output terminal (15B) of the AC power source a9. Light switch (
+61 consists of the first power line aη, the second power line (18 and a sliding switch (16A), and the first power line 07
) is equipped with a full light contact 4, an external light contact (211), and is connected to the try book 0 and the external light (6), and is connected to the second power line (l), a full light contact C! (C) It is connected to the timer mechanism (131 and the interior light (5), and the sliding switch (16A) is on the first and second lines 07),
On QB, all lights are on position I2a, outside light is on position (c),
and the all-lights-off position (E) to switch the lighting state.

The operation of the lighting device will be described below.

For example, in a supermarket where a refrigerated open showcase (1) is installed, at midnight after closing, the sliding switch (16A) of the light switch 061 is in the all-lights-off position (a), and the Both 0η and 0 chant are non-conductive, and the interior light (5) and exterior light (6) are not energized and are both turned off. In addition, when the sliding switch (16A) of the lighting switch (Ie) is slid to the outside light lighting position (251) when goods are brought in before the store opens, the first line A71 is conductive, but the second line continues to be turned on. is non-conducting, and the first line (I
Electricity is supplied to the outside light (6) through T) and it lights up.
The interior light (5) continues to be turned off. Here, the timer mechanism (13) of the light control device 01) is not energized via the second line 0 mark, and the phase control of the current flowing to the outside light (6) by the triac 02 is not performed. ) is fully lit, and the sliding switch (16A) is turned off to position 06.
) and the outside refrigerator light lighting position (25), the outside refrigerator light (6) is turned off or turned on fully. Next, when the sliding switch (16A) is slid to the all-lights-on position (24) at the time of store opening, the second line (11
9 is also conductive, and the timer mechanism 03 is connected via the second line 08).
) and the interior light (5) are energized, the timer mechanism (13) starts counting, and the interior light (5) is phase-controlled via the triac 0 in the same way as the exterior light (6). The current is supplied, and the interior lights (5) are fully lit. When a predetermined time elapses, for example 20 minutes, after all the lights are turned on, the temperature of the tube wall of the interior light (5) increases and the timer mechanism (13) counts up.
3) is output to the pulse generating circuit Q41, and the current flowing through the triac (12+) has an off time every half cycle due to the pulse from the pulse generating circuit (141), and the internal light (5) and external light (6) A phase-controlled composite current of the current flowing through the triac a and the current flowing from the AC power supply +151 through the output terminal (15A) flows, and both the interior light (5) and the exterior light (6) are dimmed. The light will continue to light up in the current state.

At this time, if you slide the sliding switch (16A) to the outside light ON position (C) or the all lights off position (E) at least once to de-energize the timer mechanism Q31, the timer mechanism Q31 will be reset and the sliding switch will start again. When the switch (16A) is slid to the all-lights-on position Q4, the timer mechanism (13&-!) starts counting and turns on the interior light (5) and exterior light (6).
is fully lit, and when the timer mechanism counts up after a predetermined period of time, dimming starts.

Therefore, the sliding switch of lighting switch QI19 (16A
) is moved to the all-lights-on position (c), the interior light (5) is always fully lit for a predetermined period of time until the pipe wall temperature rises, and when the interior light (5) is turned on, it is immediately dimmed. The rise in the temperature of the tube wall of the interior light (5) became extremely bad, and the interior light (5)
5), it is possible to prevent a decrease in illuminance and flicker from occurring, and it is also possible to prevent a decrease in the lifespan of the interior light (5).

FIG. 3 shows a discharge lamp lighting device for a refrigerated showcase shown as another embodiment, and the same reference numerals as those in FIG. 2 are the same, and detailed explanation will be omitted. In the discharge lamp lighting device shown in FIG.
A timer mechanism (131) is connected between the second line 08 of 6) and the anode of the triac 0.Therefore, as in the previous embodiment, the sliding switch (16A) is set to the all-lights-on position. When the timer mechanism (13) is energized,
The interior light (5) and exterior light (6) are fully lit for a predetermined period of time.
After the temperature of the tube wall of the interior light (5) has risen sufficiently, the interior light (5) and the exterior light (6) are turned on by phase control of try books a.
) is dimmed and when the interior light (5) is turned on, the interior light (5) is turned on.
), it is possible to reliably prevent deterioration in lighting performance, decrease in illuminance, and occurrence of flickering, and it is possible to prevent reduction in lifespan due to scattering of radioactive materials, etc.

Furthermore, as shown in FIG. 4, the lighting switch 06) is connected to the first line aη, the outside light switch (6S)
Even if 8) is replaced with a simple lighting switch Q6) equipped with an interior light switch (5S) and the interior light (5) and exterior light (6) are controlled to turn on and off on each side, the above embodiment will not work. Similar effects can be obtained.

(F) Effects of the Invention The present invention provides an external discharge lamp disposed in a low-temperature showcase and a discharge lamp lighting device for controlling the lighting of the external discharge lamp, which is connected in parallel with both discharge lamps. a ballast and a lighting tube; a lighting switch connected to an AC power supply that supplies power to the electric lights; and a lighting switch that turns on and off the electric lights; and a lighting switch that controls the phase of the current flowing to the electric lights. a timer mechanism that delays the start of dimming of the interior discharge lamp for a predetermined period of time;

The discharge lamp lighting device includes a dimmer device connected to the bidirectional element and equipped with a pulse generation circuit that controls turning on and off of the bidirectional element based on the operation of the timer mechanism. When the light switch turns on the internal discharge lamp, the internal discharge lamp is always turned on fully for a predetermined period of time, and after the tube wall temperature has risen sufficiently, it switches to dimming, so when the internal discharge lamp is turned on, It is possible to reliably prevent deterioration in lighting performance, decrease in illuminance, and occurrence of flickering in the interior discharge lamp, and also to prevent radioactive substances from scattering during lighting and shortening the life of the discharge lamp.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional view of a refrigerated open shutter case, Figs. 2 and 3 are schematic circuit diagrams of a discharge lamp lighting device shown as one embodiment of the present invention, and Fig. 4 is shown as another embodiment. FIG. 2 is a circuit diagram of a simple lighting switch. (1)...Refrigerated open showcase, (5)...
・Discharge lamp for inside the warehouse, (6)...Discharge lamp for outside the warehouse, (9)
, OQ...first and second ballast, 01)...dimmer, αri...bidirectional element, OJ...timer mechanism, 04)...pulse generation circuit, 05) ...AC power supply, 0e...Lighting switch. Figure 1 Figure 2

Claims (1)

[Claims] 1. In a discharge lamp lighting device that controls the lighting of internal discharge lamps and external discharge lamps arranged inside and outside of a low-temperature showcase, a ballast and a ballast connected in parallel with both discharge lamps are provided. A lighting tube, a lighting switch connected to an AC power source that supplies power to both discharge lamps, and controlling lighting and extinguishing of the indoor discharge lamp and external discharge lamp; a bidirectional element that controls the phase; a timer mechanism that delays the start of dimming of the interior discharge lamp for a predetermined period; 1. A discharge lamp lighting device comprising: a dimmer comprising a pulse generation circuit connected to a bidirectional element and controlling on/off of the bidirectional element based on operation of the timer mechanism.