JP2695493B2 - Load control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a load control device that supplies an optimum type of power to a household power device when the plug of the power device is connected to an outlet.

[Prior Art] FIG. 6 is a circuit diagram showing a load control device described, for example, in Japanese Utility Model Laid-Open No. 145449/1987. In the figure, the load control device (1) includes a power supply connection terminal (3). It has an outlet (2) for supplying the electric power supplied from, and the power supply connection terminal (3) is supplied with, for example, a commercial AC power supply of AC100V.

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

In addition, the load control device (1) includes a NAND as a control device.
A circuit (12) is provided, and a plug connecting device (9) including a plurality of jacks (9a to 9e) and a pull-up resistor (10) is connected to the input side of the NAND circuit (12). Therefore, when all the outputs of the plug connection detecting device (9) are at "H" level, the output of the NAND circuit (12) becomes "L" level, and even one of the outputs of the identifying device (9) is at "L" level. When the level becomes high, the output becomes "H" level.

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

Also, a plug (16) for supplying power to the load device (19) can be connected to the outlet (2),
The plug (16) is composed of a connection blade (17) which is connected to the outlet (2) and supplies electric power to the load device (19), and an information setting device (18).

Further, the information setting device (18) has a plurality of conductive pins (18a to 18e) for connecting to the jacks (9a to 9e) of the plug connection detecting device (9).
~ 18e) The load information is set according to the combined configuration with or without.

 Next, the operation will be described.

The plug connection detection device (9) before the plug (16) is connected while power is applied from the power supply connection terminal (3).
Since the pin 18 is not connected to the jacks (9a-9e), the outputs of the plug connection detecting device (9) are all at the "H" level.

In this state, the inputs of the NAND circuit (12) are all "H".
Therefore, the output of the NAND circuit (12) is at the "L" level, and the transistor (15) is off.

Therefore, the relay (8) is also turned off, the contact (8a) is opened, the outlet (2) is disconnected from the power connection terminal (3), and no power is applied to the outlet (2). It is safe to insert metal etc.

Next, when the plug (16) is inserted into the outlet (2), the connection blade (17) is connected to the outlet (2). Further, when the pins (18a to 18e) of the information setting device (18) are connected to the jacks (9a to 9e) of the plug connection detecting device (9), all the jacks (9a to 9e) in the example of FIG. )
Are connected to the pins (18a to 18e), the outputs of the plug connection detecting device (9) are all at "L" level.

Then, since the input of the NAND circuit (12) becomes "L" level, its output becomes "H" level, 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
Power from the power connection terminal (3)
And power is applied to the load device (19) via the plug (16).

In this way, since power is applied to the outlet (2) only when the plug (16) is connected, the power is cut off at the same time as the plug (16) is unplugged from the outlet (2) 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 / disconnected from the outlet (2), the plug (16) is swung while swinging. When connected, the pins (18a-18e) of the plug (16) and the jacks (9a-9e) of the outlet (2) are repeatedly connected and disconnected to make contact (8
There was a problem that a) causes chattering.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain 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. To do.

[Means for Solving the Problems] A load control device according to the present invention includes an openable and closable switch element connected to a power supply connection terminal for connecting an electric power source, and a switch element connected to a load side plug. Power supply for supplying power to the load, a plug connection detecting device that detects the connection state when the plug and the outlet are connected and outputs a connection completion signal, and a connection completion signal from the plug connection detecting device And a control device that closes the switch element so that the electric power from the electric power source is supplied to the load only when is continuously received for a predetermined time.

Specifically, a power supply connection terminal for connecting a power supply for power,
A switch element that can be opened and closed connected to the power supply connection terminal,
A load control device comprising: an outlet that outputs a power source for power supply connected by the switch element; and a plug that is connected to the outlet and supplies power to a load, wherein the plug is configured to supply power from the power source. A connection unit for receiving the connection blade, and a connection unit provided separately from the connection blade, the outlet has a coupling unit for coupling with the connection unit, and the device further has a connection unit and a coupling unit. Comparing the detection information transmitted from the detection means with the delay detection information transmitted from the delay means. And a control means for connecting the switch element when the two coincide with each other.

[Operation] The load control device according to the present invention outputs the connection completion signal from the plug connection detection device when the plug is connected to the outlet, and switches only when the control device continuously receives the connection completion signal for a predetermined time. Close the element, connect the power supply to the power supply connection terminal, supply the power from the power supply to the outlet, release the switch element when the plug connection detection device does not detect the plug connection, and disconnect from the power supply. Power off.

Embodiment 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) for supplying power supplied from power supply connection terminals (3) and (4) to a load. Outlet (2)
Is provided on the front surface of the load control device (1) and may have a structure capable of connecting an ordinary plug, but may have a special structure.

A plurality of different types of power are supplied to the power connection terminals (3) and (4). For example, the power connection terminal (3) has a commercial AC power of 100 V AC, and the power connection terminal (4) has a power supply terminal (4). Is supplied with a commercial AC power supply of 200V AC.

Further, 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), and the power connection terminal (4) and the outlet (2). And a contact (7a) of a relay (7) is connected in series.

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

Further, (9) is the same as the plug connection detecting device shown in FIG. 6, and operates a plurality of jacks (9a-9e), respective jacks (9b-9e) and this load control device (1). And a pull-up resistor (10) connected between the DC power supplies.

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

The jacks (9a-9e) are terminals for inputting the power source used by the connected equipment and other load information.

Further, a plug (16) for supplying power to the lighting and air conditioner, which is a load device (19), can be connected to the outlet (2), and the plug (16) is connected to the outlet (2). Connection blade that is connected to receive power (17)
And a plurality of pins (18a-18) for connecting to the jacks (9c-9e) and inputting the connection information of the plug (16) and load information such as the power source of the load device to the plug connection detection device (9).
e) and an information setting device (18).

And, the pins (18a to 18e) are respectively jacks (9a to 9a) when the connecting blade (17) is connected to the outlet (2).
e) is to be connected. This Jack (9a
~ 9e) serves as the coupling unit of the claims.

Further, the pin (18b) is for inputting that the flag (16) is connected, and the connection (coupling) between the pin (18a-18e) and the jack (9a-9e) is detected. Thus, it is detected that the plug (16) is connected to the outlet (2). The types of pins (18c-18e) provided on the flag (16) are for inputting load information. For example, when there is a pin (18c), it indicates that the device operates with an AC100V power supply, when there is no pin (18c), it indicates that the device is AC200V, and pins (18d, 18e) indicate the load device name depending on its presence or absence. Indicates. In this example, the pin (18
d, 18e), two types of equipment can be shown.

A load device (19) is connected to the flag (16), and pins (18c-1 to 18c-1
Predetermined pin in 8e) is set.

For example, if the load device (19) is a light source that operates at 100 VAC, the pins (18c, 18d) among the pins (18-18e)
Only long ones are used.

Further, a controller (20) as a control device is connected to the output side of the plug connection detection device (9), and a data transmission device (sends load information to the centralized display device on the output side of the controller (20) ( 21) is connected, and one terminal is connected to the NAND circuits (24, 25) input via the delay circuit (23).

Further, the NAND circuit (24) is connected to the relay (8), and the NAND circuit (25) is connected to the relay (7). The controller (20) is a plug connection detecting device (9)
Each time the plug detects a plug connection, it receives a connection completion signal from the jack (9b) of the plug connection detection device (9), and upon receipt of this signal, the delay circuit (23) and the NAND circuit (24) or NAND.
The "H" level is output to the circuit (25).

The delay circuit (23), as shown in detail in FIG.
Differentiation circuit (28) consisting of a capacitor (26) and a resistor (27) for differentiating the output (100) from the controller (20)
And a monostable multivibrator (29) that restarts the delay operation each time a delay start trigger is input, and a positive logic NO
Differentiator circuit (3) consisting of a T circuit (30) and a capacitor (31) and a resistor (32) that differentiate the output of the positive logic NOT circuit (30).
3) and a negative logic NOT circuit (35) and a negative logic NOT circuit (35) that are provided in parallel with the flip-flop (34) input to the input terminal from the differentiation circuit (33)
A differentiating circuit (38) consisting of a capacitor (36) and a resistor (37) for differentiating the output of is connected to the R input terminal of the flip-flop (34) and is delayed by a predetermined time Td (for example, 3 seconds). Is set to.

As shown in FIG. 2 (b), when the signal (100) from the controller (20) becomes “H” level, the differentiating circuit (2
The pulse signal is output from 8). Since this pulse signal is input to the monostable multivibrator (29), the monostable multivibrator (29) outputs an "H" level signal for a fixed time (Td).

This output is inverted by the positive logic NOT circuit (30) and input to the differentiating circuit (33), which outputs a pulse signal. Since this pulse signal is input to the S input terminal of the flip-flop (34), an "H" level output is output from the Q output terminal of the flip-flop (34). On the other hand, since the signal (100) is also input to the negative logic NOT circuit (35),
When the input signal (100) is inverted and the signal (100) falls, a pulse signal is output from the differentiating circuit (38). Since this pulse signal is input to the R input terminal of the flip-flop (34), the output from the flip-flop (34) becomes "L" level due to the fall of the signal (100).

Therefore, the output signal of the delay circuit (23) becomes "H" level after a lapse of a predetermined time (Td) from the last rise of the signal (100), and falls at the same time as the fall of the signal (100).

Further, since the load control device (1) is installed at a desired place in the home or the like, each is connected to the power supply line as shown in FIG. 3, and the data transmission device (21) is centralized via the data bus. It is connected to the display device (22).

FIG. 4 shows a data transmission device (2
1) shows the formation of a signal frame of load information sent from the centralized display device (22), and (44) is the self address (SA) of the load control device (1) that sends out the signal frame.

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

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

And the data (48) is the set voltage of the load device (19),
It consists of load device name, current current, error information, etc.

 Next, the operation of the present embodiment will be described.

A voltage is applied to the power connection terminals (3) and (4) to start the operation of the load control device (1), but when the plug (16) is not connected, the jack of the plug connection detection device (9). (9a to 9e) Nothing is connected, so all outputs are at "H" level and the controller (20) receiving this signal judges that the plug (16) is not connected and does not supply power. .

When the next plug (16) is connected to the outlet (2), the connection blade (17) is fitted and connected to the outlet (2), and the pins (18a to 18e) of the plug connection detection device (9). Connected to jacks (9a-9e).

In this state, the jacks (9a-9e) are at the same potential as the ground, that is, at the "L" level.

Then, when the jacks (9b) and (9c) are at the “L” level, the controller (20) determines that the load device (19) is connected when the AC100V power source is used as the power supply, and the ON signal (100) is set to NAN.
Output to D circuit (24).

One of the ON signals (100) output to the NAND circuit (24) is delayed by the delay circuit (23) for a predetermined time Td (3 seconds), and is continuously output from the controller for the delay time Tb (3 seconds). Unless the ON signal of continues to the NAND circuit (24)
No ON signal is supplied. Therefore (plug (16)
The relay (8) operates only when the power is reliably connected to the outlet (2), and chattering does not occur at the contact (8a).

Then, after the delay time Td (3 seconds) has elapsed, the NAND circuit (2
Both inputs of 4) become "H" level, current is passed through the relay (8), the contact (8a) is closed, and the outlet (2) is closed.
AC100V supplied from the power supply connection terminal (3) is applied, and this power (AC100V) is supplied to the load device (1) via the connection blade (17).
Supplied to 9).

At this time, the data transmission device (21) is connected to the controller (20)
The load information obtained from the above is serially transmitted to the centralized display device (22) according to the signal frame format of FIG. 4 by the CSMD / CD (Carrier Sense Multiple Access / Collision Detection) method, etc., and the centralized display device (22) is an outlet. The load information of the load device (19) connected via the plug (16) is displayed in (2). This allows the centralized display device (22) to recognize what kind of load is connected to the load control device (1).

When the controller (20) determines that the power source connected to the power source connecting terminal (4) is not suitable for the load device (19), the controller (20) does not operate the relay (8) and the data transmission device (21). ) Transmits the abnormal information to the central display device (22),
An alarm is issued from the central display device (22).

When pulling out the plug (16) from the outlet (2), the pin (18b) separates from the jack (9b) and the jack (9b)
At the same time that the controller (20) detects the signal of "h" level, the OFF signal (100) is transmitted to the NAND or the circuit (24) and the signal (100) which is not delayed by the delay circuit (23). Immediately becomes "L" H level, the output of the NAND circuit (24) immediately becomes "H" level, the relay (8) is deactivated, and the contact (8a) is opened.

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

Although the contacts (7a, 8a) of the relays (7, 8) are directly connected to the outlet (2) in the above-described embodiment, the present invention is not limited to this, and the contacts (7a, 8a) are not limited to this. (39) as a switch element between the socket and the outlet (2)
The contact (39a) may be provided. If you do this,
Connect the NAND circuit (40) to the relay (39), and
0) One input is directly connected to the controller (20) and the other input is connected via the delay circuit (23), and the relay (39) contact (39a) is delayed and connected. Produce an effect.

In addition, the plug connection detection device (9) and the information setting device (1
The method 8) is not limited to the method of the embodiment, and it suffices that the device connected to the outlet (2) can be set on the plug (16) side and this can be identified on the outlet (2) side. Configuration of multiple magnets as the device (18) and multiple Hall elements that detect these magnets, and configuration that identifies the load based on the presence or absence of the emitting diode installed on the outlet side and the reflector installed on the plug side of the light receiver But good.

Furthermore, in the above-described embodiment, an example in which a plurality of power sources is connected has been described, but the present invention is not limited to the number of power sources and one power source may be used.

As described 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 time. Therefore, the plug is connected to the outlet.・ When pulling out, connect the plug while swinging it. ・ Even if the plug is pulled out, chattering at the time of connection between the plug and the outlet does not cause chattering in the switch element. The effect that it can prevent being destroyed is acquired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing a configuration of a load control device according to an embodiment of the present invention, and FIG. 2 is a diagram showing a configuration of a delay circuit according to an embodiment of the present invention and a timing chart thereof. FIG. 3 is a block diagram showing the connection between the load control device and the centralized display device. FIG. 4 is a diagram showing a signal frame format of load information sent from the data transmission device to the centralized display device. FIG. A circuit diagram showing a configuration of a load control device of another embodiment,
FIG. 6 is a circuit diagram showing a configuration 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) are switch elements, and (9) is a plug connection detection device, ( 16) is a plug, (18) is a device to be detected, (19) is a load, and (20) is a control device. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Takeya 2-4-1 Nishitsujigaoka, Chofu-shi, Tokyo Tokyo Electric Power Co., Inc. Technical Research Institute (72) Ryoji Minagawa 2-14, Ofuna, Kamakura-shi, Kanagawa No. 40 Sanryyo Electric Co., Ltd. Living Systems Research Center (72) Inventor Yoshiyuki Honda 2-14-40 Ofuna, Kamakura City, Kanagawa Sanryo Electric Co., Ltd. Living System Research Center (56) Reference Japanese Patent Laid-Open No. 62- 277238 (JP, A) Actually opened 62-145449 (JP, U) Actually opened 63-56570 (JP, U) Actually opened 63-196530 (JP, U)

Claims (1)

(57) [Claims] 1. A switch element which can be opened and closed and which is connected to a power supply connection terminal for connecting a power supply for power, and an outlet which is connected to a plug on a load side and which is connected by the switch element to supply power to the load. , A plug connection detecting device which detects a connection state when the plug and the outlet are connected and outputs a connection completion signal, and only when a connection completion signal from the plug connection detecting device is continuously received for a predetermined time A load control device, comprising: a control device that closes the switch element to supply power from the power supply to the load.