JP2001025163A - Waiting power reducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce waiting power, that an electric apparatus which operates with the power of a power source obtained via a power transformer from a commercial AC power source, consumes in waiting mode. SOLUTION: This waiting power reducer is provided with a reactive current rectifying circuit 13, which rectifiers the reactive current taken out via a capacity coupling part Cc always connected to a commercial AC power source 10, and a signal receiver 14 is given operation power even in waiting mode by this rectified output, thereby made capable of receiving a starting signal at all times. This reducer is also provided with a command signal output part 15 which operates at all times by the rectified output of the reactive current rectifying circuit 13, and this output part 15 outputs a power supply command signal, when the signal receiver 14 has received the starting signal. The power supply command signal issued from the command signal output part 14 works on a power opening and closing executing part 20, and the power opening and closing execution part 20 shifts the power line opening and closing means 26 provided in series between the commercial AC power source 10 and the primary winding of an electrical apparatus power transformer 51 from the power line open state in waiting mode, up to that time to the power line close state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention operates to realize a predetermined function using a secondary output of a power transformer connected to a commercial AC power source as a power source in an operation mode,
In an electric device that is configured to be able to receive a start-up signal unpredictably transmitted from a signal transmission unit operated by a user even when the apparatus is inactive and not in operation, the power consumption during the standby is reduced. Device for reducing power.

[0002]

2. Description of the Related Art In various electric devices operated by a secondary output of a power transformer connected to a commercial AC power source, for example, a heater or a water heater such as a fan heater, signal transmitting means operated by a user, for example, a remote controller. In order to start the operation of the device at any time in response to a start signal transmitted as an infrared signal or a radio frequency signal from a controller (hereinafter referred to as a remote control), the device enters a standby mode even when the device is not operating and is at rest. In many cases, it is necessary to always supply power to the circuit portion that receives the signal. For this reason, conventionally, the primary side of the power transformer remains connected to the commercial AC power supply not only in the operation mode in which the equipment is operating but also in the standby mode, so that the primary current continues to flow, and the secondary side Power of about several watts was constantly generated.

[0003]

However, the power required for activating the device by recognizing the activating signal requires only a few milliwatts as long as the latest element technology or circuit technology is applied. It can be done with things. Nevertheless, as described above, conventionally, the main power supply is always operated and the power of several watts or more is called "standby power".
As a result, it is not desirable from the viewpoint of environmental problems related to energy consumption.

[0004] The present invention has been made in view of the above, and an object of the present invention is to provide a standby power reduction device for electric equipment which can significantly reduce standby power and contribute to energy saving. However, the purpose is to not break the situation where the equipment can be isolated from the commercial AC power supply system. In other words, electric shock,
In order to prevent leakage of electricity, it is assumed that the power of the equipment must be supplied via a power transformer as required for a heater or a water heater. Although some attempts have been made to reduce standby power, there are many ideas for transformerless devices that do not need to be insulated from commercial AC power systems, and they have been applied to devices that require insulation. Did not work.

[0005]

In order to achieve the above object, according to the present invention, in an operation mode, a predetermined function is performed by using a secondary output of a power transformer having a primary winding connected to a commercial AC power source as a power source power. In the standby mode, an electric device that operates to realize and that can enter a standby mode even during a pause in which no operation is performed and that can receive a startup signal unpredictably transmitted from a signal transmission unit operated by a user in the standby mode. A standby power reduction device; a reactive current rectifier circuit for rectifying a reactive current taken out through a capacitive coupling unit always connected to a commercial AC power supply; and a rectified output of the reactive current rectifier circuit, whereby operating power is reduced even in a standby mode. A signal receiving unit that can always receive the above-mentioned starting signal; and a rectifying output of the reactive current rectifying circuit, which is always operated, and when the signal receiving unit receives the starting signal, A command signal output section for outputting a power supply command signal; power line opening / closing means provided in series between a commercial AC power supply and a primary winding of a power transformer when receiving a power supply command signal from the command signal output section And a power supply switching unit for supplying the primary current from the commercial power supply to the primary winding of the power transformer by shifting the power supply line open state to the power supply line closed state in the standby mode up to that time. A reduction device is proposed.

Of course, the configuration of the present invention can be developed as a lower-level configuration when shifting from the operation mode to the standby mode. In addition to the above-described basic configuration, the signal receiving unit is provided with a device operation stop signal from the signal transmission means. The command signal output unit outputs a power supply command signal or a power cutoff command signal when the signal receiving unit receives the device operation stop signal, and the power supply opening / closing execution unit cuts off the power supply command signal. When the power supply cutoff command signal is received, the power supply line opening / closing means shifts from the power supply line closed state to the power supply line open state under the previous operation mode, and the primary current supplied from the commercial power supply to the primary winding of the power supply transformer. Can be shut off, thereby returning to the state under the standby mode.

Further, as a lower-order aspect of the present invention,
If the rectified power of reactive current is not enough to drive the power supply line switching means, and a certain amount of power is required, power is supplied when it is necessary, but power is not consumed in standby mode. The switching unit includes a driver unit that selectively sets the power line switching unit to the power line closed state when the operating power is supplied, and a driver power control circuit that controls power supply to the driver unit. When the driver power supply control circuit receives the power supply command signal, it supplies operating power to the driver means from the commercial AC power supply, and when the power supply command signal is cut off or receives the power cutoff command signal, the driver means It is also proposed to configure so as to cut off the operating power provided to the vehicle.

[0008]

FIG. 1 shows an embodiment of the present invention. In the illustrated case, the electric device main body 50 to be controlled is described as a heater such as a fan heater, but the electric device main body or the heater 50 is a power source in which a primary winding is connected to the commercial power source 10 in an operation mode. Operated by the secondary output of the transformer 51, it realizes a predetermined function, that is, a function of basically heating the room to a set temperature. At this time, a device control device 52, which can be generally configured to include a microcomputer (hereinafter, also referred to as a microcomputer in the drawings) controls the overall operation of the device main body 50. The type of control itself is not directly defined by the present invention, and may be any form of existing equipment. However, as typified by the heater here, in the present invention, the device main body 50 needs to adopt insulation from a commercial power supply, and is not a transformerless configuration.
It is assumed that the power transformer 51 is required.

As described above, a conventional heater or the like generally has a remote controller (hereinafter, referred to as a remote controller) even when it is not operating, that is, when it is not operating.
In order to receive the transmission signal St from the signal transmission means 11 configured as 11, since the power must be continuously supplied to the receiving circuit, there is always conduction between the commercial AC power supply 10 and the primary winding of the power supply transformer 51. And a power output was generated on the secondary side. However, this has caused a great waste of power consumption.As a result of the present invention, as a result of solving this point, first, selectively connecting the commercial AC power supply 10 and the primary winding of the power transformer 51 selectively. A power line opening / closing means 26 for opening and closing the power line between them is interposed. As will be confirmed later, the power supply line opening / closing means 26 is connected to the power supply line between the commercial AC power supply 10 and the primary winding of the power supply transformer 51 when the device main body 50 is at rest and in the standby mode. , So that no power is supplied to the power transformer 51 at all. Therefore, naturally, the power transformer 51 in the standby mode
Is zero.

In order to reduce the power consumption as much as possible when receiving the signal St transmitted from the signal transmitting means 11 even in the standby mode, the apparatus of the present invention employs a commercial AC power supply. Reactive current (leakage current) that can be extracted from the power supply 10 is intended to be used effectively, contrary to its name. As is well known, power consumption due to a reactive current having a phase difference of 90 ° flowing through a reactance circuit such as a short circuit of an AC power supply with a capacitor is zero. Therefore, in the apparatus of the present invention, the commercial AC power supply 10
The reactive current is extracted from the commercial AC power supply through the
The signal receiving unit 14 capable of receiving the signal St sent from 11 is constantly operated.

In the illustrated case, the reactive current rectifier circuit 13 includes, but is not limited to, a bridge rectifier type rectifier circuit 13a, a smoothing capacitor 13b for smoothing its output, and a zener diode 13c which preferably forms a simple stabilized power supply. The capacitive coupling section Cc is composed of a pair of capacitors 12a and 12b respectively connected in series between both ends of the commercial AC power supply 10 and one of the two AC inputs of the bridge type rectifier circuit 13a. . However, of course, a pair of capacitors in the capacitive coupling section Cc
One of 12a and 12b can be replaced with a simple line, and in other words, a capacitive coupling circuit capable of extracting a reactive current may be used. Although it is a detailed matter, in the case of the circuit configuration shown in the figure, the time constant differs between the case where both the capacitors 12a and 12b are used and the case where one of them is omitted, and the electric cord is inserted into a commercial power outlet. Then, since a difference occurs in the time from when the standby power reduction device described below starts up, it may be necessary to adjust the capacitance of the capacitor.

The signal receiving section 14 includes, for example, a case where the signal transmitting means 11 is a so-called infrared remote controller and the transmission signal St is an infrared signal, and a case where the signal transmitting means 11 is a remote controller which includes an infrared light receiving element and uses a radio frequency. May include a receiving circuit for receiving the radio frequency signal. In any case, using the current circuit technology, the operating power required for such a signal receiving unit 14 can be configured to be extremely small, and a minute power obtained by rectifying the reactive power is sufficient. Here, an infrared remote controller is assumed.

[0013] However, the signal transmitting means 11 is supplied to the signal receiving unit 14 to which the operating power is always supplied even in the standby mode.
, The start signal of the device transmitted as the transmission signal St arrives,
When the signal receiving unit 14 receives and detects this, the detection signal or the received signal Sr is sent to the subsequent command signal output unit 15. This command signal output unit 15 is also a reactive current rectifier circuit.
The rectified output of 13 is always operating as operating power, and outputs a power supply command signal So to the power supply opening / closing execution unit 20 based on the signal Sr indicating that the start signal has been received from the signal receiving unit 14, Similarly, if a recent circuit technique is used, the command signal output unit 15 can be configured to include a microcomputer, for example, so that it can operate with extremely low power. In other words, the power supply command signal So may be a signal having very little energy in terms of energy. For example, a voltage that consumes little power in principle by, for example, increasing the input impedance of the subsequent circuit system. It can be configured by signaling.

When the power supply switching unit 20 receives the power supply command signal So from the command signal output unit 15, a power supply line interposed in the power supply line between the commercial AC power supply 10 and the primary winding of the power transformer 51 is provided. The opening / closing means 26 is driven to shift from the power line open state to the power line closed state in the previous standby mode. As a result, operating power is supplied from the commercial AC power supply 10 to the device main body 50 via the power transformer 51, and the device main body can be shifted from the standby mode to the operation mode.

Therefore, as described above, if the power supply command signal So selectively output from the command signal output unit 15 can be made extremely small in terms of energy, the command signal output unit Only by the signal receiving unit 15 and the signal receiving unit 14, the standby power consumed in the standby mode can be significantly reduced, and in fact, the experimental apparatus of the present applicant has succeeded in reducing the power to at most several milliwatts. .

However, when the power supply line opening / closing means 26 is finally closed by the power supply commanding signal So via the power supply opening / closing execution unit 20, power is generated only by the reactive current output from the reactive current rectifier circuit 13. May be missing.
For example, in the case of using a normally open relay contact having a high reliability during long-term use as the power supply line opening / closing means 26, the power supply opening / closing execution unit 20 includes, as the driver means 23 for selectively closing this, It must have a relay excitation coil 23. In such a case, the operating power from the commercial AC power supply 10 must be supplied to the exciting coil 23, but the situation in which power is always supplied to the driver means 23 even in the standby mode is the purpose of the present invention. Rebel against Thus, as described above, when the driver means 23 finally closes the power supply opening / closing means 26, when a large amount of power is required, power supply to the driver means 23 is performed in the power supply opening / closing section execution unit 20. The power supply command signal So from the command signal output unit 15 is provided to control the driver power control circuit 22 in the power supply opening / closing execution unit 20 so as to substantially control the driver power supply control circuit 22. When the driver power supply control circuit 22 receives the signal So, it is preferable that the operating power obtained by rectifying the commercial AC power supply 10 via the rectifier circuit 21 be supplied to the driver means 23. The rectifier circuit 21 may have any suitable configuration, such as the bridge type shown in the drawing.

The driver power supply control circuit 22 can be easily constructed by a general circuit technique, and responds to the input of the power supply command signal So as a minute energy or voltage signal from the rectifier circuit 21 to the driver means 23. As a circuit for closing the power supply line to the power supply. However, although not limited, in a normally conceivable circuit configuration, the driver power supply control circuit 22 includes a semiconductor power switching element, and a driver means from the rectifier circuit 21 with a predetermined duty ratio to secure a predetermined output voltage. Since a line to 23 is choppered or a switching circuit including a dedicated switching transformer is used, a high-frequency AC component may be superimposed on the output. Even in the case shown in the figure, such a circuit configuration is assumed, and the output current of the driver power supply control circuit 22 is a diode 24a and a smoothing capacitor 24.
b, after smoothing by the smoothing circuit comprising
Has been applied.

In any case, when the driver means 23 consumes a considerably large amount of power, the operating power is supplied to the driver means only when necessary via the driver power supply control circuit 22 as described above. Substantially consuming power in the standby mode is the signal receiving unit 14 and the command signal output unit, each of which can be configured to use only a small amount of power.
Only 15 can be obtained, which is a very desirable result in terms of "energy saving".

The power supply line opening / closing means 26 includes a commercial AC power supply 10 and a power transformer primary winding in addition to the above-mentioned normally open relay contact.
It is also possible to use a semiconductor power switching element in which an element line is interposed in series in the power supply line between 51. In such a case, naturally, the driver means 23 can be configured as a driver circuit including a driver transistor that controls the element line of the element to be selectively turned on. Also in this case, the driver power supply control circuit 22
It is desirable that the driver circuit 23 be supplied with operating power only when it receives a power supply command signal So from the command signal output unit 15. However, conversely, in the case where the power supply line opening / closing means 26 can be driven by an electric signal of extremely small energy, for example, a microcomputer or the like included in the command signal output unit 15 is used as a driver means, and its selective output is used. A certain power supply command signal So may be used as a driver signal as it is, and the power supply line opening / closing means 26 may be closed by this. In that case, the driver power supply control circuit 22 becomes unnecessary.

Furthermore, the signal transmitting means 11 operated by the user to selectively transmit the activation signal may be a manually operated electromechanical switch. In this case, a signal receiving unit wired to the manual operation switch 11
14 can generally be made very simple. For example, if a series circuit of the switch and the resistor is assembled and a line is drawn out from a connection point between the resistor and the switch, a voltage is generated in the line only when the switch is turned on, so that it is determined that a start signal is generated. can do. It is easy for the microcomputer included in the command signal output unit 15 to understand this signal, and the power supply command signal So may be output based on the signal.

The apparatus according to this embodiment can be advantageously applied to a case where the apparatus shifts from the operation to the standby mode. When the transmission signal St selectively transmitted by the signal transmission means by the user operation is a device operation stop signal, the reception unit
The signal form may be determined so that the information recognizable by the command signal output unit 15 via 14 is different from when the start signal was received. If the command signal output unit 15 detects the reception of this operation stop signal via the signal receiving unit 14, the power supply command signal So that the command signal output unit 15 has sent to the power supply opening / closing execution unit 20 until then is interrupted. Alternatively, by configuring the power supply opening / closing execution unit 20 to transmit a power cutoff command signal for causing the power supply line opening / closing means 26 to return to the original open state from the previously closed power supply line, The apparatus returns to the initial standby mode, that is, the power using the reactive current is supplied only to the signal receiving unit 14 and the command signal output unit 15, and the apparatus main body 50 is not supplied with any power from the commercial AC power supply 10. be able to. As described above, when the driver power supply control circuit 22 is used, the power supply command signal So is cut off or the power cutoff command signal is received,
The driver power supply control circuit 22 is also configured to stop the supply of operating power to the driver means 23.

As described above, when the device control device 52 generally including a microcomputer controls the entire operation of the device body 50, the power transformer 51 of the device body 50 is used.
However, the fact that the power is supplied to the power supply does not necessarily mean that the device is configured to immediately start operating. Rather,
When an operation start signal is applied to the device control unit 52 in a state where the operation power is supplied to the device control unit 52, it is quite often the case that the control unit 52 is configured to start the control operation only there. . Therefore, in the device according to this embodiment of the present invention, the signal communication unit 30 is separately provided to satisfy this condition.

That is, when the start signal as the transmission signal St from the signal transmission means 11 is given to the signal receiving unit 14 while in the standby mode, the present apparatus operates in accordance with the mechanism already described and outputs the command signal output unit. Based on a command from the controller 15, operating power is supplied to the driver means 23 via the driver power supply control circuit 22, and the power supply transformer 51 is energized. At this time, in the illustrated apparatus, the operating power is also supplied to the transmission unit 31 of the signal communication unit 30 via the driver power supply control circuit 22 at the same time. In this case, the transmission unit of the signal communication unit is desirably a light transmission unit 31 that follows optical signal communication for the reason described later, and the light transmission unit 31 includes, for example, a light emitting element 31a and its driver transistor 31b. In series. Driver transistor 31b
Here, a light emitting element 31a is configured as a bipolar npn transistor, and its main current path between the emitter and the collector is formed of a light emitting diode.
And in series.

An output of a command signal output unit 15 which can be constituted by a microcomputer, for example, is connected to a base terminal which is a control input of the driver transistor 31b. When outputting the power supply command signal So, after a predetermined time delay, a significant voltage signal with a significant pulse width or a significant pulse train voltage signal having a logical value is applied to the base terminal of the driver transistor. Is applied. As a result, the light emitting element 31a emits light in response to the input signal, and the receiving unit provided in cooperation with the device control unit 52.
32 (in this case, the light receiving unit 32)
a) receives this signal and transmits it to the device control unit 52. Receiver
The operating power to 32 may be provided via power transformer 51. The command signal output unit 15 outputs the power supply command signal So and the signal communication unit 30 is operated with a predetermined time delay after the signal supply unit outputs the power supply command signal So. This is because a signal is sent when stable operation is started by creating a condition that operating power is given in advance. When stopping the device, in principle, it is sufficient to simply open the power supply line opening / closing means 26 by the operation described above, but if necessary,
First, if it is necessary to send a stop signal to the device control unit 52 and then turn off the power of the device, the command signal output unit 15 first transmits a stop signal in a specific signal form via the signal communication unit 30 and then transmits a predetermined signal. A power cutoff command signal may be sent to the power supply opening / closing execution unit 20 with a time delay of or the power supply command signal So may be cut off.

Such a signal communication unit 30 can be expected to be used more effectively. Generally, when an infrared signal for changing, for example, a set temperature is transmitted from the remote controller when the device body 50 such as a heater is in use, the device control unit 52 receives the signal and performs control according to the signal content. Works like that.
In such a case, a dedicated receiving unit is usually provided. However, in the present apparatus, as shown in the drawing, since the signal receiving unit 14 is already provided, it can be used as a receiving unit for such a control signal. . That is, a signal carrying device setting information or setting change information (for example, a signal for changing a desired room temperature) transmitted from the signal transmitting unit 11 is received by the signal receiving unit 14, and the command signal output unit 15 receives the signal. The device control unit 52 via the signal communication unit 30 in a signal form according to the content
Can be configured to transmit the signal. This way,
The signal receiving unit 14, the command signal output unit 15, and the signal communication unit 30 can always be used even after the device main body 50 is powered on, which is reasonable.

The reason why the optical communication structure including the light emitting element 31a and the light receiving element 32a is adopted for the signal communication section 30 is that it is necessary to provide the equipment main body 50 with insulation from the commercial AC power supply 10 as described above. In some cases, such a requirement is not impaired even when the light transmitting unit 31 is configured to be driven by a commercial AC power supply as illustrated. Of course, such a light transmitting unit and a light receiving unit can be constituted by a single, extremely small so-called photocoupler as a component.

In the illustrated embodiment, the operating power of the signal communication unit 30, particularly the transmission unit (light transmission unit) 30, is rationally and selectively supplied by sharing the driver power supply control circuit 22. However, of course, in principle, a dedicated power supply control circuit for the signal communication unit may be provided. Designated signal output section
It is sufficient that the power supply control circuit for the signal communication unit supplies the operating power from the commercial AC power supply to the signal communication unit, particularly the transmission unit 31, as the power supply command signal is output from the power supply instruction signal.

[0028]

According to the present invention, the presence of a power transformer is indispensable because it is necessary to ensure insulation from a commercial AC power supply, and even if the main body of the apparatus is in a substantially stopped state, an external signal is required. In a device that must be in the standby mode to receive the signal, the power consumption during the standby can be significantly reduced as compared with the related art. Eliminating wasteful energy consumption can also contribute to environmental issues.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a standby power reduction device according to a preferred embodiment of the present invention.

[Explanation of symbols]

 10 Commercial AC power supply 11 Signal transmission unit 12 Capacitive coupling unit 13 Reactive current rectifier circuit 14 Signal reception unit 15 Command signal output unit 20 Power supply switching unit 22 Power supply control circuit for driver 23 Driver unit 26 Power supply line switching unit 30 Signal communication unit 31 Transmitter section 32 Receiver section 50 Device main unit 51 Power transformer 52 Device control section

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K068 KA00 KB00 LA06 MB00 5G065 AA01 DA06 DA07 EA06 FA02 JA02 JA07 KA08 LA07 MA01 MA07 MA10 NA04 NA09 NA10 5G066 LA03 5K048 AA16 BA08 BA14 DA01 DB01 DB04 DC01 EB02 HA05 HA07 HA32

Claims (11)

[Claims] In an operation mode, a secondary side output of a power transformer in which a primary winding is connected to a commercial AC power supply operates to realize a predetermined function by using a secondary side output as power supply power, and stands by even during a pause when the operation is not performed. A standby power reduction device for an electric device capable of receiving a start signal unpredictably transmitted from a signal transmission means operated by a user in a standby mode in the standby mode; A reactive current rectifier circuit for rectifying a reactive current taken out through the connected capacitive coupling unit; operating power is provided even in the standby mode by a rectified output of the reactive current rectifier circuit, and the start signal can always be received. A signal receiving unit; a command signal that is always operated by the rectified output of the reactive current rectifier circuit and outputs a power supply command signal when the signal receiving unit receives the start signal. An output unit; upon receiving the power supply command signal from the command signal output unit, sets a power supply line opening / closing means provided in series between the commercial AC power supply and a primary winding of the power supply transformer to a standby mode up to that time; A power supply opening / closing execution unit that causes a primary current to be supplied from the commercial power supply to the primary winding of the power supply transformer by shifting from a power supply line open state below to a power supply line closed state. 2. The standby power reducing device according to claim 1, wherein the signal receiving unit is capable of receiving a device operation stop signal from the signal transmitting unit; and the command signal output unit is configured to receive the signal. When the receiving unit receives the device operation stop signal, the power supply command signal is cut off or a power cutoff command signal is output; and the power supply opening / closing execution unit is cut off or receives the power cutoff command signal. And the power supply line opening / closing means shifts from the power supply line closed state to the power supply line open state in the operation mode up to that time, and cuts off the primary current supplied from the commercial power supply to the primary winding of the power supply transformer. Returning to a state in the standby mode. 3. The standby power reducing device according to claim 2, wherein the power supply switching unit selectively supplies the power supply line switching unit to a power supply line closed state by supplying operating power. A driver power supply control circuit for controlling power supply to the driver means; the driver power supply control circuit operates the driver means from the commercial AC power supply when receiving the power supply command signal; Supplying electric power and, when the power supply command signal is cut off or receiving the power cutoff command signal, cuts off operating power supplied to the driver means from the commercial AC power supply;
A standby power reduction device for electrical equipment, characterized in that: 4. The standby power reducing apparatus according to claim 3, wherein the power supply line switching means is a normally open relay contact interposed in series in the power supply line; and the driver means supplies the operating power. A relay excitation coil for closing the relay contact when activated. 5. The standby power reducing device according to claim 3, wherein the power supply line opening / closing means includes an in-element line in series with the power supply line between the commercial AC power supply and the power supply transformer primary winding. And a driver circuit for closing the element line of the semiconductor switching element when the operating power is supplied when the operating power is supplied. And a standby power reduction device for electrical equipment. 6. The standby power reducing apparatus according to claim 1, wherein the signal transmitting unit is a remote controller that transmits the start signal as an infrared signal; and the signal receiving unit can receive the infrared signal. Including a light receiving element;
A standby power reduction device characterized by the above-mentioned. 7. The standby power reducing device according to claim 1, wherein the signal transmitting unit is a remote controller that transmits the activation signal as a radio frequency signal; and the signal receiving unit receives the radio frequency signal. A standby circuit for reducing standby power. 8. The standby power reducing device according to claim 1, wherein the signal transmitting unit includes a manual operation switch unit wired to the signal receiving unit; and the signal receiving unit includes a manual operation switch unit. A standby power reduction device, comprising: a circuit for determining that the start signal has been received when the start signal is set to the ON position. 9. The standby power reducing apparatus according to claim 1, wherein the electric device has a device control unit for controlling an operation of the electric device; and the device control unit is in a state where power is supplied. Receiving the operation start instruction signal, the device operation is started; the command signal output unit outputs the power supply command signal, and then, after a predetermined time delay, sends a signal to the device control unit. Outputting the operation start instruction signal via a communication unit; 10. The standby power reduction apparatus according to claim 1, wherein the electric device has a device control unit for controlling an operation of the electric device; and the device control unit is in a state where power is supplied. When receiving the setting information or the setting change information in the above, it is configured to perform a control according to the content; the signal receiving unit, the setting information signal carrying the setting information sent from the signal transmitting means or The command signal output unit is configured to receive a setting change information signal carrying setting change information; or the setting information signal or the setting carrying the setting change information is transmitted by the signal receiving unit. Receiving the change information signal and transmitting the setting information or the setting change information to the device control unit via the signal communication unit; 11. The standby power reduction device according to claim 9, wherein the signal communication unit has a light transmitting unit and a light receiving unit that communicate by placing a signal on light. Operating power is supplied from the commercial AC power supply by operating the power control circuit for the signal communication unit as the command signal output unit outputs the power supply command signal; the operating power to the light receiving unit is The standby power reduction device is provided through a power transformer of the device body.