JP2002318645A - Stand-by power reducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stand-by power reducing device equipped with a timer mechanism for reducing stand-by power, and for efficiently functioning the reference timer of the timer mechanism. SOLUTION: This stand-by power reducing device 1 is provided with a commercial power source 2, a switching means 3 for supplying and interrupting the power of the commercial power source 2 to/with a power source transformer T1, and a controller 6 having a timer mechanism 14 incorporating a reference timer and a storage part 11. This device is also provided with a pulse generating means 9 for generating a pulse prepared by the frequency of the commercial power source 2 and an oscillator 12 for oscillating the pulse. When the commercial power source is supplied, the reference timer is operated by using the pulse of the pulse generating means 9 as the reference clock, and the data obtained by counting the pulses of the oscillator 12 in a fixed time are stored in the storage part 11, and after the commercial power source 2 is supplied, the power supply is interrupted when equipment to be controlled is on standby, and the reference timer is operated by using the data of the storage part 11 as the reference clock.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standby power reducing device that can reduce standby power when a controlled device is on standby (stop) using a power supply such as a commercial power supply.

[0002]

2. Description of the Related Art Conventionally, control devices for various controlled devices are:
For example, as shown in FIG.
A commercial power supply 52 is connected to the primary side of the power transformer 51, and a contact 53 of a transformer energizing relay is provided between the commercial power supply 52 and the primary side of the power transformer 51, and a rectifier is provided on the secondary side. A control device 56 is connected via a power supply for the control device having a circuit 54, a constant voltage circuit 55, and the like. Further, a load 5 such as a coil of a relay for operating electric components such as a cooling fan and a heater is provided to the control device 56.
7 is connected.

When the operation of the controlled device is started by turning on the operation switch 58, the contact 53 of the transformer energizing relay is closed in conjunction with the operation of the operation switch 58, and power is supplied to the control device 56. At the same time, energization of the load 57 is started. When the operation switch 58 is turned off, the contact 53 of the relay is opened, the power supply of the control device 56 is cut off, and the power supply to the load 57 is stopped.

As described above, the control device 56 of the controlled device is
However, during operation of the controlled device, power is supplied, but during standby, power supply is cut off and power is not consumed.

[0005]

However, there is a recent control device 56 of a controlled device which incorporates a timer mechanism, for example. In order to create a reference timer for this timer mechanism, the control device 56 is actually controlled. Even when the equipment is not operating, power is supplied to the control device 56, current flows in both the primary circuit and the secondary circuit, and power is consumed. Its power consumption cannot be ignored (about 2
4W).

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and a commercial power supply is connected to a primary side of a power transformer, and a control device is connected to a secondary side of the transformer. It is an object of the present invention to significantly reduce standby power of a controlled device and to accurately operate a reference timer of a timer mechanism.

[0007]

In order to achieve the above object, an invention according to claim 1 includes a power transformer, a commercial power supply connected to a primary side of the power transformer, and an input of the commercial power supply. In a standby power reduction device for a controlled device, comprising: a switching unit for supplying / interrupting to a power transformer, and a control unit having a timer mechanism and a storage unit having a built-in reference timer, a pulse generated at the frequency of the commercial power supply. A generator and an oscillator that oscillates a pulse having a frequency higher than the commercial power supply frequency are provided.When the commercial power is turned on, the reference timer is operated using the pulse of the pulse generator as a reference clock, and the oscillator pulse is counted for a certain period of time. The obtained data is stored in a storage unit, and after the commercial power is turned on, when the controlled device is on standby, the power supply is cut off by the switching unit, Characterized by operating the reference timer data 憶部 as the reference clock.

According to a second aspect of the present invention, in the standby power reducing apparatus according to the first aspect, a voltage monitoring unit for monitoring a secondary voltage of a power transformer is provided in the control means, and In standby mode, when the power supply to the power transformer is cut off and the voltage of the voltage monitoring unit falls below a predetermined low voltage, the switching unit is switched to supply power to the power transformer.

According to a third aspect of the present invention, in the standby power reducing apparatus according to the first or second aspect, when the input to the power supply transformer is resumed when the controlled device is on standby, the pulse generating means is activated. The reference timer is operated using the pulse as a reference clock, and data obtained by counting the pulses of the oscillator for a certain period of time is stored in a storage unit. And operates a reference timer.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram of a standby power reducing device according to an embodiment of the present invention. This standby power reduction device (hereinafter simply referred to as a reduction device) 1 has a power transformer T1,
A commercial power supply (single-phase 10
0V) 2 is connected, and between the commercial power supply 2 and the power transformer T1, a contact SW2 of a relay and a switching circuit 3 for supplying / cutting off the input of the commercial power supply 2 to / from the power transformer T1 are provided in parallel. I have. The control device 6 is connected to the secondary side of the power transformer T1 via the rectifier circuit 4 and the constant voltage circuit 5.
Are connected, a relay operation circuit 7, an operation circuit 8 for switching the switching circuit 3, and a pulse generation circuit 9 are provided.

The switching circuit 3 includes a phototriac PC1
When the phototriac PC1 is turned on, the commercial power supply 2 is energized to the primary winding, so that a current flows through the primary winding of the power transformer T1 and power is supplied to the secondary side, and the secondary side is supplied. The power is supplied to the control device 6 and the like connected to the.

The contact SW2 of the relay is a contact of the relay that supplies an input to the power transformer T1 when the power is turned on, and closes when power is not supplied to the drive coil of the relay and opens when power is supplied.

The rectifier circuit 4 is connected to the secondary winding of the power transformer T1 and has a diode bridge DB1 for full-wave rectification of the secondary output, and a diode bridge DB1.
Has a smoothing capacitor C1 for smoothing the output subjected to full-wave rectification.

The constant voltage circuit 5 has an integrated circuit IC1 for stabilizing the voltage output from the rectifier circuit 4. The output side of the integrated circuit IC1 is connected to the control device 6, and the constant voltage output is supplied to the control device 6. VDD2 is supplied.

The relay operating circuit 7 includes a transistor Q2 for outputting a constant voltage of the driving coil Z1 of the relay, and a driving coil Z.
1 and a drive transistor Q3 for the drive coil Z1. These are connected in series in order, connected to the output side of the rectifier circuit 4, and connected to the drive transistor Q3.
3 is connected to the control device 6 via a resistor R8.

The operation circuit 8 includes a resistor R7, a drive photodiode PD1 for turning on and off a phototriac PC1 of a switching circuit 3 provided on the primary side of the power transformer T1, and a drive transistor Q4 for the photodiode PD1. These are sequentially connected in series, one end of the operation circuit 8 is connected to the constant voltage output VDD2, the other end is connected to the ground, and the base of the driving transistor Q4 is connected to the control device 6 via the resistor R9. ing.

The pulse generating circuit 9 has a diode D1 and a transistor Q1. The collector of the transistor Q1 is connected to a constant voltage output VDD2 via a resistor R1, connected to the control device 6, and has a base connected to a power transformer. It is connected to the secondary winding of T1 and diode D1, and the emitter is connected to ground. A current having a full-wave waveform on the secondary side of the power transformer T1 is supplied to the base of the transistor Q1 via the resistor R5. Thereby, as shown in FIG. 2, the full-wave waveform on the secondary side of the power transformer T1 is compared with the DC voltage of the constant voltage output VDD2, and a pulse waveform is generated from the collector of the transistor Q1. Since a pulse can be generated using the commercial power supply 2, a precise and stable pulse can be supplied to the control device 6 using the pulse as a reference clock.

The control device 6 includes a microcomputer (hereinafter referred to as a microcomputer) for controlling electric components of the controlled device.
15, a voltage monitoring unit 13 for monitoring the secondary voltage of the power transformer T1 and a timer mechanism 14 for operating the electric components at a set time. The timer mechanism 14 has a built-in reference timer for measuring time and the like. As the input terminals of the control device 6, the power supply terminal 17 of the control device 6 connected to the output side of the constant voltage circuit 5, the monitoring terminal 21 for detecting the secondary voltage of the power transformer T1, and the pulse waveform are input. Pulse input terminal 2
2. An operation terminal 23 connected to the operation / stop switch SW1 of the controlled device is provided, and a constant voltage output transistor Q2 of the drive coil Z1 of the relay is provided as an output terminal;
Relay driving terminal 16 connected to relay driving transistor Q3, operation circuit terminal 1 connected to operation circuit 8
8 are provided.

The control unit 6 is provided with a storage unit 11 and an oscillator 12 having a ceramic oscillator, and has a built-in voltage monitoring unit 13 and timer mechanism 14. The ceramic oscillator 12 operates at low power and oscillates a pulse of about 80 MHz. Since this pulse has some variation in the cycle and lacks accuracy when used as a reference clock, the number of oscillator pulses for a certain period of time based on the power supply frequency is counted, and this count is used as a reference. The clock is used as a clock (for example, the number of pulses during 20 msec. Is counted, and 50 times the number is 1 second). This count number is stored in the storage unit 11 as data. The voltage monitoring unit 13 is connected between the resistors R2 and R3 connected in series to the output side of the rectifier circuit 5 to detect the output voltage of the rectifier circuit 5, and monitors the divided voltage of the rectifier circuit 5. ing.

The control device 6 is connected to a start / stop switch SW1 of the controlled device. When the start / stop switch SW1 is turned on, a signal is transmitted to the operation circuit 8 via the operation circuit terminal 18. Then, the operation circuit 8 is operated to turn on the phototriac PC1 to supply power to the power transformer T1.

When the voltage monitor 13 detects a value equal to or higher than a predetermined high voltage, the controller 6 controls the relay driving terminal 16.
A signal is transmitted to the relay operation circuit 7 via the, and the relay operation circuit 7 is operated.

Next, the reduction device 1 configured as described above will be described.
The operation of the controlled device during standby will be described.

When the commercial power supply 2 is turned on to the reduction device 1 (for example, the power plug of the controlled device is inserted into the power outlet), the contact SW2 of the relay is closed.
Power is supplied to the power transformer T1. A current flows through the rectifier circuit 4 and the constant voltage circuit 5, and power is supplied to the control device 6 and the pulse generation circuit 9 from the constant voltage output VDD2. The transistor Q1 turns on, the pulse generation circuit 9 operates,
A pulse is input to the control device 6, and the pulse activates the reference timer. Further, the voltage generated between the resistors R2 and R3 is monitored by the voltage monitoring unit 13, and the ceramic oscillator 12 oscillates a pulse.

Next, the control device 6 transmits a signal to the operation circuit 8 and the relay operation circuit 7 to operate the operation circuit 8 and the relay operation circuit 7. The photodiode PD1 operates to turn on the phototriac PC1 of the switching circuit 3 provided on the primary side of the power transformer T1, and current flows through the drive coil Z1 to open the contact SW2 of the relay.

Next, the number of pulses of the ceramic oscillator 12 is counted, and the counted number is stored as data in the storage unit 1.
1 is stored. At the time point when the information is stored, the control device 6 stops the signal to the operation circuit 8, and the switching circuit 3 is turned off. The power supply to the power transformer T1 is cut off, and the pulse generation circuit 9 stops generating pulses. Control device 6
Switches from the pulse of the pulse generation circuit 9 to the data stored in the storage unit 11 and activates the reference timer.

Next, since the power supply to the power transformer T1 is cut off, when the voltage monitoring unit 13 detects a voltage lower than a predetermined low voltage, a signal is oscillated in the operation circuit 8 and the phototriac PC1 is turned on and again. Power is supplied to the power transformer T1. Since power is again supplied to the power transformer T1, the pulse generating circuit 9 is operated, and the switching of the switching circuit 3 for switching to the pulse of the pulse generating circuit 9 to operate the reference timer is repeated. The supply and cutoff of power to the power supply are repeated, so that the power during standby can be reduced. The control device 6 controls the commercial power source 2
When the power is supplied, the pulse of the pulse generation circuit 9 is used as a reference clock, and when the power of the commercial power supply 2 is cut off, a reference timer is operated using data obtained by counting the number of pulses of the ceramic oscillator 12 for a certain time as a reference clock. Therefore, the functions of the control device 6, such as the reference timer 14, can be accurately and stably maintained.

Next, the operation of the controlled device during operation will be described. When the operation / stop switch SW1 of the controlled device is turned on and the operation of the controlled device is started, the control device 6
Oscillates a signal to the operation circuit 8 to operate the operation circuit 8.
The phototriac PC1 is kept in a continuous conduction state,
Power is supplied to the power transformer T1. The pulse generation circuit 9 is operated, and a pulse generated by the commercial power supply 2 is supplied to the control device 6, and the pulse always activates the reference timer.

FIG. 3 is a flowchart showing the operation of the reference clock for activating the reference timer, and a time chart showing the supply of commercial power and the switching of the reference clock when the controlled device is on standby.

In FIG. 3, when the commercial power supply 2 is turned on to the reduction device 1, power is supplied to the power supply transformer T1 and the pulse generation circuit 9 operates. A pulse is generated by the pulse generation circuit 9, and the pulse is input to the control device 6.

Further, power is supplied to the control device 6, and a process of setting an initial port and the like is performed (step S1), and the ceramic oscillator 12 oscillates a pulse. Initial variable setting processing (step S3) and comparison processing for correcting the operation reference clock of the microcomputer 15 are performed (step S4). That is, the number of pulses of the ceramic oscillator 12 is counted for a certain period of time based on the cycle of the two frequencies of the commercial power supply, a reference clock is generated, and the reference clock is stored in the storage unit 11 as data.

Next, in step S5, when an operation switch or an operation switch provided on the controlled device is operated, if the operation switch is turned on, the control device 6 is turned on.
It is determined whether or not the power of the commercial power supply 2 is input to the power supply (step S6). When the commercial power supply 2 is input to the control device 6, the reference timer is operated by the reference clock generated by the pulse generation circuit 9 to perform time counting processing such as time (step S7). Thereafter, the process proceeds to step S5, and the reference timer is operated by the reference clock generated by the pulse generating circuit 9 until the reference timer is turned off.

In step S6, the control device 6
When the commercial power supply 2 is not input to the power supply (standby state of the controlled device), the reference timer is operated by the reference clock generated by the ceramic oscillator 12, and time counting processing such as time is performed (step S8). At the same time, a correction process such as the time of the timer mechanism 14 for operating the electric components provided in the controlled device at the set time is performed (step S9).

Thereafter, the process proceeds to step S5, and when the commercial power supply 2 is input to the control device 6, such as when the operation switch is turned on or when the voltage monitoring unit 13 detects a predetermined low voltage, the process proceeds to step S6. , S7 are selected and when the commercial power source 2 is not input, the flow of steps S8 and S9 is selected.

After the commercial power supply 2 is turned on to the reduction device 1, when the controlled device is on standby, the supply and cutoff of the power to the control device 6 are repeated to reduce the standby power.

FIG. 4 is a time chart showing the supply of commercial power and the switching of the reference clock when the controlled device is on standby, corresponding to the display of the steps in FIG.

In FIG. 4, step S1 (commercial power supply 2
From the time of turning on) to step S6 (excluding step S5), while the commercial power source 2 is supplied to the controller 6,
The reference timer is operated by the reference clock generated by the pulse generation circuit 9. In step S6, when the input of the commercial power supply 2 to the power transformer T1 is interrupted and it is determined that there is no input of the commercial power supply 2, the steps S8 and S9 are performed.
In, the reference timer is operated by switching to the reference clock generated by the ceramic oscillator 12. Then, in step S6, the presence or absence of an input is always determined.
7, or the operations of step S8 and step S9 are alternately repeated, and the reference timer is continuously operated.

As described above, the reference timer operates with the reference clock generated by the pulse of the pulse generating circuit 9 and the high-precision reference clock generated by the ceramic oscillator 12, so that the timer mechanism 14 of the control device 6 and the like are provided. Function can be accurately and stably maintained. Also, by using the ceramic oscillator 12 that operates with low power, the power of the reduction device 1 during standby can be significantly reduced.

Although the present invention has been described based on various embodiments, the present invention is not limited to these embodiments.

[0040]

As described above, the standby power reducing apparatus according to the present invention provides a power transformer, a commercial power supply connected to the primary side of the power transformer, and a power supply / supply of the commercial power to the power transformer. Switching means, and a control means having a timer mechanism having a built-in reference timer and a storage unit, a pulse generating means for generating a pulse generated at the frequency of the commercial power supply, and an oscillator for oscillating the pulse. At this time, the reference timer is operated using the pulse of the pulse generating means as a reference clock, and the data obtained by counting the pulses of the oscillator for a certain period of time is stored in the storage unit. In some cases, the reference timer is operated using the data in the storage unit as a reference clock, so that the accuracy of the oscillator pulse is improved and the power to the pulse generation means is increased. Power standby power reduction apparatus by stopping the supply can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a standby power reduction device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a secondary output of a power transformer and an output waveform of a pulse generating circuit when the controlled device in FIG. 1 is on standby.

FIG. 3 is an operation flowchart of a reference clock that operates a reference timer.

FIG. 4 is a time chart showing supply of commercial power and switching of a reference clock when a controlled device is on standby.

FIG. 5 is a block diagram showing a configuration of a conventional standby power reduction device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 power reduction device 2 commercial power supply 3 switching circuit (switching means) 4 rectifier circuit 5 constant voltage circuit 6 control device (control means) 7 relay operation circuit 8 operation circuit (operation means) 9 pulse generation circuit (pulse generation means) 11 Storage unit 12 Ceramic oscillator (oscillator) 13 Voltage monitoring unit 14 Timer mechanism 15 Microcomputer T1 Power transformer PC1 Phototriac PD1 Photodiode for drive DB1 Diode bridge D1 Diode IC1 Integrated circuit Q1 Transistor Q2 Transistor for constant voltage output Q3 Drive Transistor Q4 Driving transistor R2, R3 Resistance VDD2 Output voltage of constant voltage power supply Z1 Drive coil

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshinari Minami 1 Otsukicho, Ashikaga, Tochigi Prefecture Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Tadashi Yamaguchi 1 Otsukicho, Ashikaga City, Tochigi Sanyo Electric Air Conditioning Co., Ltd. F term (reference) 5B011 DA01 EA10 GG03 KK03 LL05 5G065 AA01 DA06 DA07 EA06 HA04 JA02 JA07 KA02 KA05 LA01 MA05 MA07 MA09 MA10 NA09 5H420 BB02 BB14 CC04 DD02 DD03 EA05 EA24 EB01 EB26 FF03 GG06

Claims (3)

[Claims] 1. A power supply transformer, a commercial power supply connected to a primary side of the power supply transformer, a switching unit for supplying / cutting power of the commercial power supply to / from the power supply transformer, a timer mechanism including a reference timer, and a storage unit In a standby power reduction device for a controlled device having a control unit having: a pulse generating unit for a pulse generated at the frequency of the commercial power supply, and an oscillator that oscillates a pulse having a frequency higher than the commercial power supply frequency, When the commercial power is turned on, the reference timer is operated using the pulse of the pulse generation means as a reference clock, and data obtained by counting the pulses of the oscillator for a fixed time is stored in the storage unit. When the device is on standby, the switching means cuts off the power supply and activates a reference timer using the data in the storage unit as a reference clock. Standby power and reducing device. 2. A voltage monitoring unit for monitoring a secondary voltage of a power transformer in the control means, wherein when the controlled device is on standby, power supply to the power transformer is cut off and the voltage of the voltage monitoring unit is set to a predetermined value. The standby power reducing device according to claim 1, wherein when the voltage becomes lower than the low voltage, the switching unit is switched to supply power to a power transformer. 3. When the input to the power supply transformer is resumed while the controlled device is on standby, a reference timer is operated using the pulse of the pulse generation means as a reference clock,
The data obtained by counting the pulses of the oscillator for a predetermined time is stored in a storage unit, power supply is cut off by the switching unit, and a reference timer is operated using the data in the storage unit as a reference clock. Item 3. The standby power reduction device according to Item 1 or 2.