JP2000134825A - Power source switching device for electrical appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce electric power during remote control standby in an electrical appliance such as a TV set. SOLUTION: A casing 1 which includes a terminal for connecting an electric wire from a solar battery 2, an attachment plug 6 inserted into a lighting line socket, and a plug socket 13 for plugging a TV set 10, accommodates a battery 16 charged by receiving a DC output voltage of a solar battery 2, an inverter 17 for converting the DC output voltage of the solar battery 2 into an AC voltage, a current transformer 20 for detecting current running through the TV set 10, a comparing circuit 21 for comparing the output signal with the signal of a preset value, and a relay 18 conducting switching between the inverter 17 side and the lighting line side for the plug socket 13, into which the plug 12 of the TV set 10 is inserted based on the output signal. The TV set 10 needs on power supply from a lighting line while the TV set 10 is on standby, thus it is possible to attain drastic energy saving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to switching of the power supply of electric equipment mainly applied to household electric equipment using a remote controller, such as a television receiver, a video recording / reproducing apparatus, an indoor air conditioner or a fan. It concerns the device.

[0002]

2. Description of the Related Art A remote control is attached to a television receiver (hereinafter referred to as a television), a video recorder (hereinafter referred to as a video), an indoor air conditioner (hereinafter referred to as an air conditioner), or a fan. On, off and various controls can be performed. Many remote controllers of this type use infrared rays, and the above-mentioned televisions, videos and the like are provided with a receiving circuit for receiving infrared signals. When a remote controller is operated, a signal emitted from the remote controller is always used. The corresponding operation is performed. To this end, a power supply for standby of the remote controller is always supplied to the receiving circuit, so that about 5 to 6 watts of power is consumed.

At present, one house has a plurality of televisions and videos, and an air conditioner and a fan are provided for each room. Therefore, the power consumption of the above-mentioned standby power supply also increases, not only affecting the electricity rate,
Even in the sense of conserving limited power resources, some means of reducing this is needed. However, at present, no effective means for solving this has been proposed.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and a power source for standby of an electric device is provided by a solar cell, or a power source of a remote controller for controlling on / off of the electric device. Is provided by a solar cell to provide a power supply switching device for electrical equipment that saves power consumption.

[0005]

According to the present invention, as a means for solving the above-mentioned problems, in the invention described in claim 1, a solar cell and a DC output current of the solar cell are converted into an AC current. An inverter to be switched, a switching means for switching between an output current of the inverter and a current supplied from a power line when receiving a control signal and supplying the load to a load, and detecting whether the load is in a standby state and detecting the state of the load. And an operation detecting means for transmitting a switching control signal to the switching means.

According to a second aspect of the present invention, in the first aspect, the operation detecting means detects a current flowing through a load, and an output signal of the current transformer. Is compared with a signal of a preset value.

Further, in the invention described in claim 3, a casing having a terminal for connecting an electric wire from a solar cell, a plug for insertion into a power line outlet, and an outlet for inserting a plug for load. Inside, a battery that is charged by receiving the DC output voltage of the solar cell, an inverter that is connected in parallel to the battery and converts the DC output voltage of the solar cell into an AC voltage, and a car that detects the current flowing to the load Rent transformer and a comparison circuit for comparing the output signal thereof with a signal of a preset value, and a relay for switching between the inverter side and the light line side to an outlet into which a plug of the load is inserted by an output signal of the comparison circuit. And is accommodated.

According to the invention described in claim 4, a solar cell, a control circuit that uses a DC output current of the solar cell as a power source, and outputs a control signal when receiving an infrared signal, And switching means for switching on and off the power from a power line to be supplied to the load when the signal is received.

Further, in the invention described in claim 5, a terminal for connecting an electric wire from a solar cell, a plug for insertion into a power line outlet, an outlet for inserting a plug for load, and an infrared ray from a remote controller. Inside a casing having a light receiving element for receiving a signal, a battery charged by receiving the DC output voltage of the solar cell, and a control signal connected in parallel with the battery and receiving an infrared signal from a remote controller. A control circuit for outputting, and an output signal of the control circuit, for turning on a power supply from a power line to be supplied to a load;
A relay for switching off is housed.

According to the first to third aspects of the present invention, when the load of the television or the like is in a standby state, the power supply of the receiving circuit for receiving a signal (generally, an infrared signal) from the remote control is supplied from the solar cell to the inverter Is supplied via When you send a signal to activate the TV with the remote control, a current that is several times the current that was flowing up to that point will flow. This change is detected by the operation detecting means, and a switching control signal is transmitted to the switching means. Thereby, the switching unit switches the circuit connected from the solar cell side to the circuit supplied from the power line.

[0011] In the invention of claims 4 and 5,
When a signal is sent from a remote controller to an infrared light receiving element arranged near the television, the switching means receives the signal and supplies a current supplied from the power line to the load.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment corresponding to claims 1 to 3 of the present invention will be described below with reference to FIG.
Terminals 4 and 5 to which the electric wire 3 from the solar cell 2 is connected, and terminals 8 and 9 to which the cord 7 of the plug 6 to be inserted into a power line outlet (not shown) are connected to the casing 1 of the standby power supply device. And terminals 14 and 15 connected to an outlet 13 for inserting a plug 12 attached to a cord 11 of the television 10 as a load.

The circuit inside the casing 1 will be described. The terminals 4 and 5 are connected to the battery 16 and the input side of the inverter 17. The battery 16 is charged by receiving the output voltage of the solar cell 2 and supplies current to the inverter 17 even when the solar cell 2 does not function, such as at night. One of the output sides of the inverter 17 is connected to a terminal 8 to which the plug 6 is connected and a terminal 14 to which the outlet 13 is connected.

The other output side of the inverter 17 is a relay 1
8 normally closed contacts 19a. The normally open contact 19b is connected to the terminal 9 to which the insertion plug 6 is connected. The primary coil 20a of the current transformer 20 is connected between the movable contact 19c of the relay 18 and the terminal 15. The secondary coil 20b of the current transformer 20 is connected to the input terminals 21a and 21b of the comparison circuit 21. The comparison circuit 21 has power supply terminals 21c, 21c.
d, in which the terminal 8, to which the plug 6 is connected,
9 is connected. The output terminal 21e of the comparison circuit 21,
The coil 22 of the relay 18 is connected to 21f.

A description will be given of the method of use and operation of the thus configured device. First, as a preparation, the solar cell 2 is installed on the roof of a building or the like so as to receive sunlight efficiently. As a result, the voltage generated by the solar cell 2 is constantly applied to the battery 16, so that the battery 16 is charged. The number of the batteries 16 is appropriately selected and connected in series, and the total generated voltage is made to match the generated voltage of the solar cell 2.

The plug 6 is plugged into a power line outlet (not shown) so as to constantly receive an AC voltage of 100 volts. In addition, the plug 12 is inserted into an outlet 13 so that a voltage from the terminals 14 and 15 is supplied to the television 10 as a load. The power switch of the main body of the television 10 is turned on, and the television 10 is in a standby state in which it operates when receiving an infrared signal from a remote controller (not shown).

Since the solar cell 2 has a sufficient amount of power generation in the daytime, the battery 16 is in a charged state, and all the current supply to the inverter 17 is performed by the solar cell 2. During the night when the sun goes down, the battery 16 charged during the day serves as a power source. The inverter 17 converts a DC voltage received from the solar cell 2 or the battery 16 into an AC voltage of 100 volts, and converts the AC voltage into a normally closed contact 19 a of the relay 18.
The output is output from the movable contact 19c to the outlet 13 via the primary coil 20a of the current transformer 20. As a result, the standby current flows through the television 10, and the television 10 maintains the standby state.

Primary coil 2 of current transformer 20
At 0a, a minute current flows when the television 10 is in a standby state. The power source for this is sufficiently provided by the amount of power generated by the solar cell 2 and the electromotive force of the battery 16. Since the current flowing through the primary coil 20a of the current transformer 20 is small, the voltage induced in the secondary coil 20b, that is, the voltage input to the input terminals 21a and 21b of the comparison circuit 21 is also small. For this reason, even if the voltage is compared with the voltage set in advance in the comparison circuit 21, the voltage does not exceed the set voltage, and the coil 22 of the relay 18 is not energized.

A person watching the television 10 operates a remote controller,
When the power switch is turned on, the television 10 is activated by receiving the infrared signal, and a current about 10 times that in the standby state flows. When the current rapidly increases, the voltage induced in the secondary coil 20b of the current transformer 20 increases, so that the voltage exceeds the voltage preset in the comparison circuit 21 and the output terminals 21e and 21f of the comparison circuit 21. Is connected to the coil 22 of the relay 18. When the coil 22 is energized, the movable contact 19c separates from the normally closed contact 19a that has been in contact therewith and comes into contact with the normally open contact 19b. When the movable contact 19c comes into contact with the normally open contact 19b, a current flows from the power line power supply (AC 100 volt) through the plug 6 to the television 10, which is a load.

When the viewer of the television 10 stops operating the power switch of the remote controller to stop watching the television 10, the television 10 stops operating and returns to the standby state. Then, the current flowing through the primary coil 20a of the current transformer 20 is reduced to about one-tenth of that during the operation of the television 10, so that the voltage induced in the secondary coil 20b is reduced. Lower than the set voltage.
Therefore, the current supply to the coil 22 of the relay 18 connected to the output terminals 21e and 21f of the comparison circuit 21 is cut off, and the movable contact 19c switches to the normally closed contact 19a.
Therefore, the television 10 is supplied with the generated voltage of the solar cell 2 converted into AC by the inverter 17 (the electromotive voltage of the battery 16 at night).

FIG. 2 shows an embodiment corresponding to claims 4 and 5 of the present invention. This circuit is connected with the power switch of the load (such as a television) turned on so that a standby current does not flow when not operated by a remote controller. The power generated by the solar cell is used as a power source for a circuit that receives a signal from a remote controller. Since the standby current does not flow when the remote control is not used, it is not suitable for a video having a clock function and is suitable for a television, an air conditioner, a fan, or the like.

This circuit will be described with the same parts as in FIG. Stand-by power supply casing 1
Have terminals 4 and 5 to which the electric wire 3 from the solar cell 2 is connected.
And terminals 8 and 9 to which the cord 7 of the plug 6 is connected to a power line outlet (not shown), and the TV 1 as a load.
Terminals 14 and 15 connected to an outlet 13 into which an insertion plug 12 attached to a zero cord 11 is inserted, and terminals 24 and 25 to connect a light receiving element 23 described later are provided.

The circuit inside the casing 1 will be described. Terminals 4 and 5 are connected to battery 16 and power supply terminal 2 of control circuit 26.
6a and 26b are connected. The battery 16 is charged by receiving the output voltage of the solar cell 2 and supplies current to the control circuit 26 even when the solar cell 2 does not function, such as at night.

The control circuit 26 has power supply terminals 26a, 26
b, AC power supply terminals 26c and 26d, and input terminals 26e and 26f for inputting signals from the infrared light receiving element 23.
And output terminals 26 g and 26 h for supplying a current to the coil 22 of the relay 18. The AC voltage supplied to the AC power supply terminals 26c and 26d
For exciting the coil 22 of FIG. Relay 18
Are provided with a normally open contact 19b and a movable contact 19c. The normally open contact 19b is connected to the terminal 8, and the movable contact 19c is connected to the terminal 14. Terminals 9 and 15 are directly connected.

A description will be given of the method of use and operation of the thus configured device. Preparation before use is almost the same as in the previous embodiment. The plug 6 is plugged into a power line outlet (not shown) so as to always receive an AC voltage of 100 volts. The plug 12 is plugged into an outlet 13 and the terminal 1 is connected to the TV 10 as a load.
The voltage from 4 and 15 is supplied. However,
Unlike the previous embodiment, the television 10 turns on the power switch of the main body, turns on the power switch of the remote controller (not shown) (that is, operates), and inserts the plug 12 into the outlet 13.

A person watching the television 10 operates a remote controller,
When the power switch is turned on, an infrared signal emitted from the remote controller is received by the light receiving element 23 and input to the control circuit 26. When an infrared signal is input, the control circuit 26 supplies a current to the coil 22 of the relay 18 to excite it. When the coil 22 is excited, the movable contact 19c
Contacts the normally open contact 19b. As a result, the voltage of the power line is supplied to the television 10 as a load via the plug 6. As described above, since the power switch is turned on on both the main body side and the remote control side, the television 10 is immediately activated when the movable contact 19c of the relay 18 comes into contact with the normally open contact 19b.

When a viewer of the television 10 stops operating the television 10 by operating the power switch of the remote controller, the light receiving element 23 receives the infrared signal and inputs the infrared signal to the control circuit 26. The control circuit 26 cuts off the current supplied to the coil 22 of the relay 18 when an infrared signal is input. When the coil 22 is de-energized, the movable contact 19c is separated from the normally open contact 19b, so that no voltage is supplied to the TV 10, which is a load, and the load is turned off.

In the two embodiments described above, the power supply to the television 10 is switched by the relay 18 as an electromagnetic device.
However, instead of this, a switch circuit using a semiconductor may be used, and further, a circuit using a photocoupler may be used. In the case of a circuit using these semiconductors, the switching time is very short, so that a sense of incongruity does not occur as compared with a conventional general device not using this device.

In the embodiment shown in FIGS. 4 and 5, the remote controller can be shared with a television or the like, but it is preferable to use a remote controller having a different frequency from that of the television or the like. For example, this power supply switching device can be used as it is for various types of televisions and the like manufactured by many manufacturers.

[0030]

Since the present invention is a power supply switching device for electric equipment configured as described above, according to the first aspect of the present invention, a standby state in which a control signal is not transmitted by a remote controller or the like is provided. In such a case, the television or the like does not need to receive power supply from the power line, so that significant energy saving can be achieved.
Since the control signal can be easily transmitted by a remote controller or the like, there is no difference from the conventional operation and the operability is good.

According to the second aspect of the present invention, an important one of the circuits described in the first aspect is constituted by a current transformer and a comparison circuit, so that it can be easily implemented. become. Furthermore, according to the third aspect of the invention, the specific members housed inside the casing are limited, so that the first aspect of the invention can be easily realized.

According to the fourth aspect of the present invention, the solar cell only needs to supply power to the control circuit, so that the solar cell can be small and the circuit configuration can be simplified.
Since there is no need to detect a change in current flowing through a load such as a television, there is no restriction on the size and type of the electrical device serving as the load. According to the fifth aspect of the present invention, since the specific members housed inside the casing are limited, the realization of the fourth aspect of the invention is facilitated.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing another example of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Solar cell 4 terminal 5 terminal 6 insertion plug 8 terminal 9 terminal 10 television 13 outlet 16 battery 17 inverter 18 relay 20 current transformer 21 comparison circuit 23 light receiving element 26 control circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04Q 9/00 311 H01L 31/04 K F term (Reference) 5F051 BA05 JA17 KA03 KA03 KA05 5G003 AA06 BA03 DA06 FA02 GB06 5G015 FA08 GA04 HA04 HA12 JA05 JA35 JA52 5K046 BA07 BB06 CC05 CC09 CC16 CC18 5K048 AA03 AA16 BA03 CA11 DA01 DB02 DC01 EA01 EA21 EB13

Claims (5)

[Claims] 1. A solar cell, an inverter for converting a DC output current of the solar cell into an AC current, and, when receiving a control signal, switching between an output current of the inverter and a current supplied from a power line to a load. A power supply switching device for electric equipment, comprising: switching means for supplying, and operation detection means for detecting whether the load is in a standby state and transmitting a switching control signal to the switching means according to the state. . 2. The apparatus according to claim 1, wherein said operation detecting means is a current transformer for detecting a current flowing through a load, and a comparing circuit for comparing an output signal of said current transformer with a signal of a preset value. Item 7. A power supply switching device for an electric device according to Item 1. 3. A terminal for connecting an electric wire from the solar cell,
Inside the casing with the plug for the power line outlet and the outlet for inserting the plug for the load,
A battery that is charged by receiving the DC output voltage of the solar cell, an inverter that is connected in parallel to the battery and converts the DC output voltage of the solar cell into an AC voltage, a current transformer that detects a current flowing to a load, and A comparison circuit for comparing the output signal with a signal of a preset value, and a relay for switching between the inverter side and the light line side are housed in an outlet into which the plug of the load is inserted according to the output signal of the comparison circuit. A power supply switching device for electrical equipment, characterized in that: 4. A solar cell, a control circuit which uses a DC output current of the solar cell as a power source, and outputs a control signal when receiving an infrared signal, and a load when receiving a signal from the control circuit. A power supply switching device for electrical equipment, comprising: switching means for switching on and off power from a power line to be supplied. 5. A terminal for connecting an electric wire from a solar cell,
Inside the casing provided with a plug for plugging into a power line outlet, a plug for plugging in a load, and a light receiving element for receiving an infrared signal from a remote controller, is charged by receiving the DC output voltage of the solar cell. Battery and
A control circuit which is connected in parallel to the battery and outputs a control signal when receiving an infrared signal from a remote controller, and switches on / off power from a power line supplied to a load by an output signal of the control circuit. A power supply switching device for electrical equipment, wherein the power switching device houses a relay.