JPH0546237Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a dimming device that dims a light source by phase control.

[Background technology]

BACKGROUND ART Conventionally, a light control device has been frequently used in which power is supplied from an AC power source to a light source such as an incandescent lamp, the phase of which is controlled through a semiconductor switching element for phase control.

Such a light control device is installed at a position that is easy for a person to operate so that the person can freely adjust the brightness of the light source. For this reason, they are often installed embedded inside walls, columns, or floors.

Therefore, the light control device is housed in a sturdy switch box made of plastic or metal so that it can be installed embedded in any location.

The rated load capacity of the light control device housed in such a switchbox is set within the range of the maximum load capacity. Here, the maximum load capacity means that the temperature at which the amount of heat generated from each component of the dimmer and the amount of heat dissipated from the switchbox is balanced is the rated temperature of any circuit component in this dimmer. When they are equal, this is the value found by multiplying the input current and input voltage of this light control device. And this maximum load capacity is
It is displayed on the switch box as the rating of the switch box.

Therefore, these combinations are usually regulated in advance,
The rated load capacity is designed to fall within the range of the maximum load capacity.

For example, you can store a 500w dimmer in a 500w switchbox, or store an 1100w dimmer in an 1100w switchbox.
There is an example in which a light control device for one circuit is configured. In addition, it can be used as a switch box for 1100w with a large shape.
In some cases, two 500W dimmers are housed to form a dual-circuit dimmer.

In this way, if the total rated load capacity of the housed dimmers falls within the range of the maximum load capacity displayed on the switchbox, then
It can be used practically without any problem.

However, in the conventional example shown in FIG. 6, a 500W dimmer 10 and a small 250W dimmer 20 are housed in a small 500W switch box 4, and the dimmer 20 is operated simultaneously. Since the dimmer 1 is configured to allow the use of two circuits, the total load capacity when used simultaneously is limited to 500W or less, and only one of the 250W dimmers 20 can be used. When using 500w switch box 4, if the rated load capacity is
There was a practical problem that it could only be used up to 250w.

Here, the light control device 1 has a plate 5 on the front thereof.
is attached to the notch of this plate 5.
A 500W dimmer 10 and a 200W dimmer 20 are installed. Both knobs 2, 2 of the respective dimmers 10, 20 are provided protruding from the front plate 5, and by rotating the knobs 2, the power to the load (not shown) is adjusted.

Therefore, for example, if two 500W dimming circuits are required, in the conventional example, the only option is to use a large switch box 4 for 1100W, which poses the problem of increasing the size and cost. .
In addition, for the small switch box 4 for 500w,
When trying to install two dimmer circuits, there was a problem that only a 500W dimmer and a 200W dimmer could be accommodated, and the dimming control amount for one was limited to 200W.

[Purpose of invention]

The present invention was devised to improve the above-mentioned problems, and its purpose is to provide a light control system in which multiple light dimmers are housed in a switch box, with approximately equal output from all light dimmers. An object of the present invention is to provide a compact light control device capable of providing the following.

[Disclosure of invention]

With this invention, the total load capacity when using multiple dimmers housed in a switchbox at the same time is
As long as it is always within the maximum load capacity of this switchbox, by setting the common circuit elements of each of the dimmers to a rating approximately equal to this maximum load capacity, the circuit elements can be made smaller and the common circuit elements can be It was created by focusing on the fact that it can be transformed into

Therefore, the rated load capacity of each dimmer is
Settings can be made until the maximum load capacity is approximately equal to the maximum load capacity, increasing the degree of freedom in combining dimming control amounts when multiple dimmers are used in combination, and common circuit elements have been standardized, resulting in a compact and compact design. It can be constructed at low cost.

(Example) Hereinafter, the present invention will be explained in detail based on an example. Incidentally, parts having the same functions as those of the conventional example are given the same reference numerals and redundant explanations will be omitted.

FIG. 1 shows the basic configuration of a dimming circuit.

1 is a light control device, in which a first light control device 1a is installed.
A second dimmer 1b is configured.

The first dimmer 1a is a first dimmer circuit A that is inserted in series between the AC power source E and the first incandescent lamp La1, and controls the dimming of the first incandescent lamp by phase control.
is formed.

Similarly, the second dimmer 1b is used for the incandescent lamp 1a2.
A second dimming circuit B is formed to control dimming.

FIG. 2 is an external view of the light control device of the present invention.

3 is a dimmer storage case;
It houses a dimmer 1a and a second dimmer 1b.

FIG. 3 is a circuit diagram showing a first embodiment of the present invention.

The power supply voltage of the AC power supply is applied to a series circuit of the first 500W incandescent lamp La1 and the first 500W dimmer 1a, and is further applied to the series circuit of the 500W first incandescent lamp La1.
It is also applied to the series circuit of 2 and the second dimmer 1b for 500W. and the first dimmer 1
The inductor L, which is a common circuit element between the dimmer a and the second dimmer 1b, is unified into one and miniaturized,
This is a 500W light control device 1, which is housed in a 500W switch box 4 shown in FIG.

The first dimmer 1a for 500W includes a series circuit of a switch SW1, a triax Q1, and an inductor L, which are connected in parallel to the output end of the AC power supply E via the first incandescent lamp La1 for 500W. Variable resistor VR1 connected to both ends of this triac Q1
and capacitor C2, and this connection point is connected to the gate terminal of triac Q1.
Trigger element Q2 such as SBS and the above triax Q
1 and a noise prevention capacitor C1 connected in parallel to a series circuit of an inductor L.

The second dimmer 1b for 500W is constructed in the same manner, so its explanation will be omitted.

Here, the first dimmer 1a and the second dimmer 1b
The inductor L, which is a common circuit element with the switch box 4, is configured to be a single inductor L that can be used up to 500 W, which is the maximum load capacity of the switch box 4.

The resistance value of the variable resistor VR1 is changed in conjunction with the rotation of the knob 2 shown in FIG. Just like a switch opens when you open the door,
They are constructed in conjunction with each other.

The operating state shown in FIG. 3 will be explained below.

When AC power supply E is applied, variable resistor VR1
The capacitor C2 is charged through the capacitor C2, and the voltage gradually increases. When the voltage of capacitor C2 reaches the breakover voltage of trigger element Q2 after a predetermined period of time, the charge of capacitor C2 reaches the trigger element Q2.
1 gate as an on signal. and,
Triack Q1 conducts and the first
Incandescent light La1 → Switch SW1 Triack Q1
A current flows through the closed circuit from → inductor L → AC power supply E, and the first incandescent lamp La1 lights up.

Next, when it is desired to dim the light, the time required for the capacitor C2 to reach the breakover voltage can be adjusted using the variable resistor VR1.

Here, the series circuit of capacitor C1 and inductor L is a filter for reducing noise generated due to the steep current flowing through triac Q1 due to phase control.

The second dimmer 1b for 500W also operates in the same manner, so its explanation will be omitted.

In this way, since the noise prevention inductor L, which is a common circuit element, is shared and reduced to one, the two dimmers 1a and 1b can be constructed inexpensively and compactly. I was able to store two 500W dimmers in it.

Also, since both of the dimmers installed are 500W, you can obtain a load capacity of up to 500W even when using only one of the dimmers. This also has the effect of increasing the degree of freedom in combining both dimmers.

Furthermore, the rated load capacity of the dimmer 1 housing both dimmers must be set within the maximum load capacity of the switchbox 4; The maximum load capacity is 500W, the rated load capacity of the dimmer 1 is 500W,
Rated load capacity of each dimmer 1a, 1b
Since it is set to the same rating as 500W, the valuable space inside the switchbox 4 can be used extremely effectively, and further miniaturization can be achieved.

Next, FIG. 4 shows a second embodiment of the present invention, which differs from the first embodiment in that the AC power source is of a single-phase three-wire type.

Here, the voltage between a and b and between b and g is 100V, and the voltage between a and b is 100v.
g is 200v.

In this way, the single-phase three-wire AC power source has the advantage of being extremely easy to connect.

FIG. 5 shows a third embodiment of the present invention. In contrast to the first embodiment in which the inductor is used as a common circuit element, this embodiment uses a triac heat sink 6 as a common circuit element. This is what was used. Therefore, each dimmer is configured to be electrically independent, and only the heat sink 6 is shared.

The heat sink 6 can be configured in common when the triax Q1 is 5A and the triax Q3 is 0A.
1A for Triack Q1, 4A for Triack Q3
This is because the case is almost the same.

This is approximately the maximum on-voltage of the triax.
At 1.4v, total loss of 7w for the former and total loss for the latter
This is because it is the same as 1.4w + 5.6w = 7.0w.

Here, 7 is a screw that fixes both triaxes Q1 and Q3 to the heat sink 6.

It should be noted that the entire description of the first embodiment of the present invention is
The maximum load capacity was 500w, and the rated load capacity was used, but it goes without saying that anything other than 500w is fine.
It goes without saying that it is not necessary that all the dimmers have the same maximum load capacity and rated load capacity, and that the rated load capacities of the plurality of dimmers do not need to be the same. Further, the common circuit element is not limited to the inductor L and the heat sink 6 of this embodiment, but any circuit element that can be used in common may be used.

The key is to set the rated load capacity of a dimmer consisting of multiple dimmers within the maximum load capacity of the switchbox 4, and set the rating of the common circuit elements of the multiple dimmers within the range of the maximum load capacity of the switchbox 4. Any type may be used as long as it is set approximately equal to the rated load capacity and the number of common circuit elements is smaller than the number of dimmers.

[Effect of idea]

As described above, the present invention reduces the number of common circuit elements of a plurality of dimmers to less than the number of dimmers, and
Since the actual capacity of the common circuit element was set approximately equal to the rated load capacity, it became possible to set the rated load capacity of each dimmer until it became approximately equal to the maximum load capacity, and it was possible to set the rated load capacity of each dimmer until it became approximately equal to the maximum load capacity. This has the remarkable effect of increasing the degree of freedom in combining the amount of dimming control when using a combination of light devices, and since common circuit elements are shared, the structure can be made smaller and cheaper. .

[Brief explanation of the drawing]

Figure 1 is a basic configuration diagram of a light control circuit, Figure 2 is a front view of the light control device of the present invention, b is a side view, and Figure 3 is a circuit configuration diagram showing the first embodiment of the present invention. , 4th
The figure is a circuit diagram showing a second embodiment of the present invention, FIG. 5 is a circuit diagram showing a third embodiment of the present invention, and FIG.
The figure is a configuration diagram showing a conventional example. 1... Dimmer, 1a, 1b... Dimmer, 4...
...Switchbox, 6, L...Common circuit element.

Claims (1)

[Scope of utility model registration request] A plurality of dimmers are stored in a switchbox, and within the maximum load capacity of the switchbox,
In a light control device that sets a rated load capacity,
The number of common circuit elements of the plurality of dimmers is smaller than the number of dimmers, and the substantial capacity of the common circuit element is set to be approximately equal to the rated load capacity. light device.