JPH03149779A - Load control device - Google Patents

Abstract

PURPOSE:To prevent the chattering of switch elements by feeding the power from a power source when a plug connection detecting device detects the connection of a plug continuously for a preset period. CONSTITUTION:When a plug 16 is connected to a receptacle 2, the information of an information setting means 18 is detected by a plug connection detecting device 9, if the plug connection detecting device 9 detects the connection of the plug 16 continuously for a preset period via a control device 20, switch elements 7a and 8a are closed to connect the power source to power connecting terminals 3 and 4, and the power from the power source is fed to the receptacle 2. If the plug connection detecting device 9 does not detect the connection of the plug 16, switch elements 7a and 8a are released to stop the power from the power source. Even if the plug 16 is swayed when it is connected or disconnected from the receptacle 2, switch elements 7a and 8a are connected after the plug 16 is connected to the receptacle 2 for a preset period, thus the chattering of switch elements 7a and 8a can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a load control device that supplies an optimal type of power to a domestic power device when the plug of the device is connected to an outlet.

[Prior art 1] Fig. 6 is a circuit diagram showing a load control device described in, for example, Japanese Utility Model Application Publication No. 62-145449. It has an outlet (2) that supplies power supplied from the
For example, the power supply connection terminal (3) is connected to a commercial AC power supply AClo.
oV is supplied.

A contact (8a) of a relay (8) as a switch element is connected between the power supply connection terminal (3) and the outlet (2).
are connected in series.

In addition, the load control device (1) is an NA as a control device.
It has an ND circuit (12), and a NAND circuit (12).
On the input side of the plug connection detection device W, which is composed of a plurality of jacks (9a to 9e) and a pull-up resistor (10).
(9) is connected, and when all the outputs of the plug connection detection device (9) are rH level, the NAND circuit (12
) output becomes rL rubel, and if even one of the outputs of the identification device Ml (9) becomes rL rubel, the output becomes rH rubel.

A resistor (14) is connected to the output side of the NAND circuit (12).
), and the transistor (15) controls the relay (8) according to the output of the NAND circuit (12), that is, the output of the plug connection detection device (9). .

In addition, a plug (16) for supplying power to the load device (19) can be connected to the outlet (2), and the plug (16) can be connected to the outlet (2) to supply power to the load device (19). It consists of a connection blade (17) that supplies power to the information setting device (18).

Furthermore, the information setting device (18) includes a plug connection detection device (9).
) is provided with a plurality of conductive pins (18a to 18e) for connection to jacks (9a to 9e), and load information is set depending on the combination of presence and absence of these pins (18a to 18e).

Next, the operation will be explained.

When power is applied from the power connection terminal (3) and before the plug (16) is connected, the plug connection detection device (9)
Since pin 18 is not connected to the jacks (9a to 9e), the output of the plug connection detection device (9) is all rH.
It's in Loubel.

In this state, all inputs of the NAND circuit (12) are r
Since it is at H level, the output of the NAND circuit (12) is rL level, and the transistor (15) is turned off.

Therefore, the relay (8) is also OFF, its contact (8a) is open, the outlet (2) is disconnected from the power connection terminal (3), and no voltage is applied to the outlet (2). ) is safe even if you accidentally insert a metal object into it.

Next, when the plug (16) is inserted into the Funcent (2), the connecting blade (17) is connected to the outlet (2). In addition, the bins (188 to 18) of the information setting device (18)
e) is the jack (9a to 9) of the plug connection detection device (9).
e), in the example of FIG. 6, all the jacks (9a to 9e) are connected to the bins (18a to 18e), so the output of the plug connection detection device (9) is all rL.
Becomes Rubel.

Since the input of the NAND circuit (12) is rL rubel, its output is rH rubel, and the base current is supplied to the transistor (15) to turn it on.

When the transistor (15) turns on, the relay (8) turns on.
NL, the power from the power connection terminal (3) is connected to the outlet (2).
) and is applied to the load device (19) via the plug (16).
) is applied.

In this way, power is applied to the outlet (2) only when the plug (16) is connected, so as soon as the plug (16) is removed from the outlet (2), the power is cut off to ensure safety. ing.

[Problems to be Solved by the Invention] Since the conventional load control device is configured as described above, when the plug (16) is connected to or unplugged from the outlet (2), the plug (16) is oscillated. When connected,
There was a problem in that the pins (18a to 18e) of the plug (16) and the jacks (9a to 9e) of the outlet (2) were repeatedly connected and disconnected, causing chattering in the contacts (8a).

This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a load control device that prevents chattering by connecting a power source to an outlet only when a plug is connected to the outlet for a predetermined time. do.

[Means for Solving the Problems] A load control device according to the present invention includes a power supply connection terminal for connecting a power source, a switch element that can be opened and closed connected to the power supply connection terminal, and a switch element connected by the switch element. An outlet that outputs power, a plug that is connected to the outlet and supplies power to a load, an information setting means provided on the plug, and detecting information on the information setting means when the plug is connected to the outlet. a plug connection detection device, which supplies power from a power source when the plug connection detection device detects a plug connection for a predetermined period of time; and a power source when the plug connection detection device does not detect a plug connection; A control device that controls opening and closing of the switch element so as to stop power from the power source] A load control device according to the present invention includes a plug connection detection device when a plug is connected to an outlet. detects the information of the information setting means, and when the plug connection detection device detects the connection of the plug continuously for a predetermined period of time by the control device, closes the switch element and connects the power source to the power supply connection terminal;
Power from the power source is supplied to the outlet, and when the plug connection detection device does not detect connection of the plug, the switch element is released and power from the power source is stopped.

[Implementation I14] An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the load control device (1) has an outlet (2) that supplies power supplied from power supply connection terminals (3) and (4) to the load.

The outlet (2) is provided on the front side of the load control device (1), and may have a structure to which a normal plug can be connected, but may also have a special structure.

The power supply connection terminals (3) and (4) are each supplied with a plurality of different types of power. For example, the power supply connection terminal (3) is supplied with a commercial AC power source Acioov, and the power supply connection terminal (4) is supplied with a plurality of different types of power. is supplied with a commercial AC power supply of 200V AC. 'Also, a contact (8a) of a relay (8) as a switch element is connected in series between the power connection terminal (3) and the outlet (2). ) is connected to the relay (7
) are connected in series.

Note that one of the contacts (7a) and (8a) is connected to the respective power supply connection terminals (3) and (4), and the other is connected to the outlet (2).

Furthermore, (9) is similar to the plug connection detection device shown in FIG.
) and a pull-up resistor (10) connected between a DC power source and a DC power source for operating the device.

And the jack (9a) is connected to ground,
The jack (9b) is the plug (16) and the outlet (2)
This is a terminal for detecting that it is connected to the

Further, the jacks (9c to 9e) are terminals for inputting the power source used by the connected equipment and other load information.

Furthermore, a plug (16) for supplying power to lighting and air conditioners, which are load devices (19), can be connected to the outlet (2), and the plug (16) can be connected to the outlet (2). Connecting blade (1) to connect and receive power supply
7) and the jacks (9a to 9e) and connect the plugs (1
An information setting device (18) consisting of a plurality of bins (18a to 18e) for inputting the connection information of 6) and load information such as the power source used by the load device to the plug connection detection device (9).
).

The bins (18a to 18e) each have a jack (9) when the connecting blade (17) is connected to the outlet (2).
a to 9e).

Further, the bin (18b) is for inputting that the plug (16) is connected, and the bins (18c to 18e) are for inputting that the plug (16) is connected.
) is for inputting load information. For example, when there is a bottle (18C), it indicates that the device operates on AClooV power supply, and when there is no bottle (18c),
c200V, and the bins (18d, 18e)
indicates the load equipment name depending on its presence or absence. In this collar, there are two bottles (18fd, 18e), so four types of equipment can be shown.

A load device (19) is connected to the plug (16), and depending on the type of the load device (19), a bin (19) is connected in advance.
8C to 18e) is set.

For example, is the load device (19) AC100V? - In the case of working lighting, the longer pins (18c, 18d) of the pins (18c to 18e) are used.

In addition, a controller (20) as a control device is connected to the output side of the plug connection detection device H (9), and a data transmission for sending load information to a central display device is connected to the output side of the controller (20). device (21) is connected, and one human power is connected to the NA via the delay circuit (23).
ND circuits (24, 25) are connected.

Further, a relay (8) is connected to the NAND circuit (24), and a relay (7) is connected to the NAND circuit (25). The controller (20) operates a delay circuit (
23) and NAND circuit (24) or NAND circuit (2
5) Output rH rubel.

The delay circuit (23), as shown in detail in FIG. 2(a),
A differentiation circuit (28) consisting of a capacitor (26) and a resistor (27) that differentiates the output (100) from the controller (20) restarts the delay operation every time a delay start trigger is input manually.

A monostable multi-by-break (29), a positive logic NOT circuit (30), a differentiation circuit (33) consisting of a capacitor (31) and a resistor (32) for differentiating the output of the positive logic NOT circuit (30), and this differentiation circuit (33). A negative logic NOT circuit (35) which has a flip-flop (34) inputted to the input terminal from the circuit (33) and is provided in parallel with these, and a capacitor for differentiating the output of the negative logic NOT circuit (35). (
A differentiating circuit (38) consisting of a resistor (36) and a resistor (37) is connected to the R input terminal of the flip-flop (34), and is set to delay for a predetermined time Td (for example, 3 seconds delay).

As shown in FIG. 2(b), when the signal (100) from the controller (20) becomes rH rubel, the differentiating circuit (
28) outputs a pulse signal. Since this pulse signal is input to the monostable multivibrator (29), the rH rubel signal for a certain period of time (Td) is output from the monostable multivibrator (29).

This output is inverted by the logic FlNOT circuit (30) and input to the differentiation circuit (33), from which a pulse signal is output. This pulse signal is a flip-flop (34
), the rH rubel is output from the Q output terminal of this flip-flop (34). On the other hand, the negative logic NOT circuit (35) also receives a signal (100).
is input, the input signal (400) is inverted, and a pulse signal is output from the differentiating circuit (38) when the signal (100) falls. Since this pulse signal is input to the R input terminal of the flip-flop (34), the output from the flip-flop (34) becomes rL level due to the fall of the signal (100).

Therefore, the output signal of the delay circuit (23) is the signal (100)
After a predetermined time (Td) has elapsed since the last rise of signal (100), it becomes rH rubel and falls simultaneously with the fall of signal (100).

In addition, since the load control device (1) is installed at a desired location in the home, etc., each is connected to a power supply line as shown in Fig. 3, and the data transmission device (21) is centrally connected via a data bus. It is connected to the display device W (22).

Figure 4 shows the data transmission device (21
) shows the signal frame format of the load information sent from the central display device (22), and (44) is the self-address (SA) of the load control device (1) that sends the signal frame.

Further, (45) is a destination address (DA) from which the signal frame is received, and (46) is a control code (CC) indicating control information of the signal frame and attributes of data (48).

Further, (47) is a byte count (BC) indicating the message length of data (48), and (49) is a frame check code (FCC) used for controlling transmission errors of the entire control signal.

The data (48) includes the set voltage of the load device (19), the name of the load device, the current current, abnormality information, etc.

Next, the operation of this embodiment will be explained.

Voltage is applied to the power supply connection terminals (3) and (4), and the load control device (1) starts operating, but when the plug (16) is not connected, the jack of the plug connection detection device (9) Since nothing is connected to (9a to 9e), all outputs are rH rubel, and the controller (20) receiving this signal determines that the plug (16) is not connected and does not supply power.

Next, when the plug (16) is connected to the outlet (2), the connection blade (17) is fitted and connected to the outlet (2), and the bins (18a to 18e) are connected to the plug connection detection device (
9) jacks (9a to 9e).

In this state, the jacks (9a to 9e) have the same potential as the ground, that is, rL rubel.

When the jacks (9b) and (9c) become "L" level, the controller (20) determines that the load device (19) powered by ACIooV is connected, and sends the ON signal (100) to the NAND circuit (24). ).

ON signal (100) output to NAND circuit (24)
One of them is delayed for a predetermined time Td(3) by a delay circuit (23).
The ON signal is not supplied to the NAND circuit (24) unless the ON signal from the controller continues during this delay time Td (3 seconds). Therefore, the plug (16) is securely connected to the outlet (2).
), the relay (8) operates only when the contact (
No chattering occurs in 8a).

After the delay time Td (3 seconds) has elapsed, the power of both the NAND circuit (24) becomes rH rubel, and the relay (8
), the contact (8a) is closed, and AClo is supplied to the outlet (2) from the power connection terminal (3).
oV is applied, and this power (AClooV) is applied to the connecting blade (1
7) to the load device (19).

At this time, the data transmission device (21) is connected to the controller (20
) is serially transmitted to the central display device (22) using the CSMD/CD (carrier sense multiple access/collision detection) method according to the signal frame format shown in Figure 4.
2) displays load information of the load device (19) connected to the outlet (2) via the plug (16). This allows the centralized display device (22) to recognize what kind of load is connected to the load control device (1).

Also, if the power supply connected to the power supply connection terminal (4) is connected to the load device (
19), the controller (20) does not operate the relay (8) and the data transmission device! (21) transmits abnormality information to the central display device (22), and the central display device (22) generates an alarm.

When pulling out the plug (16) from the outlet (2), the pin (18b) separates from the jack (9b) and the jack (
9b) is the rH rubel signal to the controller (2
0) is detected and at the same time the OFF signal (100) is detected.
Since the signal (100) sent to the D circuit (24) and not delayed by the delay circuit (23) immediately becomes rL rubel, the output of the NAND circuit (24) immediately becomes r
The relay (8) is deactivated and the contact (8a) is opened.

As a result, power supply to the outlet (2) is stopped.

In addition, in the above embodiment, the contacts (7a, 8a) of the relays (7, 8) were connected directly to the outlet (2).
However, the present invention is not limited to this, and as shown in FIG. 5, a contact (39a) of a relay (39) as a switch element may be provided between the contacts (7a, 8a) and the outlet (2). In this case, the NAND circuit (40) is connected to the relay (39), one input of the NAND circuit (40) is directly connected to the controller (20), and the other input is connected through the delay circuit (23). and connect the contact (3) of the relay (39).
A similar effect can be obtained by connecting 9g) with a delay.

In addition, a plug connection detection device (9) and an information setting device f (18) are also included.
) is not limited to the method of the embodiment, it is sufficient if the device connected to the outlet (2) can be configured on the plug (16) side and identified on the outlet (2) side, for example, an information setting device (18) may include a configuration with multiple magnets and multiple Hall elements that detect these magnets, or a configuration in which the load is overprinted based on the presence or absence of a reflector installed on the plug side using a light emitting diode and a light receiver installed on the outlet side. .

Furthermore, although the above-mentioned embodiment has been described using an example in which a plurality of power supplies are connected, the present invention is not limited to the number of power supplies, and may be one power supply.

[Effects of the Invention] As explained above, according to the present invention, the switch element is closed and the power source is connected to the outlet only when the plug is connected to the outlet for a predetermined period of time.
Even if the plug is connected/unplugged while rocking when connecting/unplugging the plug to/from the outlet, the switch element is connected after the plug has been connected to the outlet for a predetermined period of time, thereby preventing chattering of the switch element.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of a load control device according to an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of a delay circuit and its timing chart according to an embodiment of the present invention, and FIG. 3 is a diagram showing the configuration of a load control device according to an embodiment of the present invention. A block diagram showing the connection between the device and the central display device, FIG. 4 is a diagram showing the signal frame format of load information sent from the data transmission device to the central display device, and FIG. 5 is a diagram showing load control according to another embodiment of the present invention. FIG. 6 is a circuit diagram showing the structure of a conventional load control device. In the figure, (1) is a load control device, (2) is an outlet, (3) and (4) are power supply connection terminals, (7a) and (8a)
) is a switch element, (9) is a plug connection detection device, (1
6) is a plug, (18) is a detected device, (19) is a load, and (20) is a control device. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Patent Attorney Masuo Oiwa (2 others) 4■Fu/1 -1\ 1 Input signal Zo. (b) Delay circuit and its timing diagram Fig. 2 12; r\ / l------11 = Conventional load control device No. 6gl December 20, 1999

Claims (1)

[Claims] A power supply connection terminal that connects a power supply, a switch element that can be opened and closed connected to the power supply connection terminal, an outlet connected by this switch element that outputs the power supply, and a power supply connected to this outlet that outputs power to a load. A load control device comprising: an information setting means provided on the plug; a plug connection detection device that detects information of the information setting means when the plug is connected to an outlet; and a plug connection detection device. When the plug connection detecting device detects the connection of the plug continuously for a predetermined period of time, power is supplied from the power source, and when the plug connection detection device does not detect the connection of the plug, the power from the power source is stopped. A load control device comprising: a control device that controls opening and closing of a switch element.