JP2740733B2 - Control device with clock function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device having a clock function for controlling a controlled device at an arbitrarily set time.

[0002]

2. Description of the Related Art For example, a fan heater provided with a control device having a clock function allows a user to set an arbitrary time,
By setting a so-called timer mode, it is possible to start or stop the operation of the fan heater at a set time. This type of control device with a clock function controls a clock device that measures the current time, a time setting device that sets an arbitrary time, and controls the controlled device when the current time matches an arbitrarily set time. Operation control means such as a microcomputer.

By the way, if a power failure occurs while the timer mode is set, if the power supply to the clock means and the time setting means is stopped, the time of the clock means and the time of the time setting means return to the initial values. There is an annoyance that the current time and the set time have to be set again when the power is restored.

[0004] In view of the above, at the time of a power failure, the operation control means sets the information indicating whether or not the timer mode has been selected, the current time of the clock means, and the set time of the time setting means as EEPR.
Write to OM (non-volatile storage means) and EEP when power is restored
It is desired to read out such information from the ROM and automatically reset the current time and the set time.

However, if there is a capacitor that backs up the power supply of the control device for 0.5 second, it is not possible to write information such as the selection of the timer mode, the current time, and the set time to the EEPROM immediately after the power failure. Although it is possible, since the time of the power outage is not known, when the power is restored, the time of the clock means and the time of the time setting means are automatically reset based on the information stored in the EEPROM. Such inconvenience may occur.

That is, if the power outage time is very long, E
There is a discrepancy between the time of the clock means stored in the EPROM and the current time at the time of power recovery, and there is an inconvenience that the set time is significantly delayed from the time desired by the user. In addition, in the case of a fan heater, if the power plug is disconnected from the outlet in the timer mode when storing it after the cold period, it will be in the same state as when power is restored when the power plug is connected to the outlet the next time it is used The time of the clock means and the time of the time setting means are set according to the information stored in the EEPROM when the power plug is disconnected from the outlet, and the fan heater is set according to the time set by the time setting means regardless of the user's intention. Operation is started or stopped.

[0007] In order to solve the above-mentioned inconvenience, a capacitor is provided to back up the power supply of the control device at the time of power failure. There are things that try to maintain. For example, by providing a capacitor having a capacity capable of supplying power for three minutes in order to cope with a power failure for at least three minutes, if a power failure occurs within three minutes, the current time can be measured even during the power failure. .

However, in general, a large-capacity capacitor capable of backing up the power supply to the control device for three minutes is very expensive and has a disadvantage of increasing the cost of the product.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and solves the above-mentioned inconvenience. Can control,
An object of the present invention is to provide a control device with a clock function which is inexpensive and has a simple configuration.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a clock means for measuring a current time, a time setting means for setting an arbitrary time, a battery which is charged when power is supplied and discharged when a power failure occurs. A capacitor to be controlled, operation control means for selecting a timer mode for controlling the controlled device to a predetermined operation when the current time matches an arbitrarily set time, information on whether or not the timer mode is selected, clock means Time information, time information set by the time setting means, the capacitor
A non-volatile storage means for storing data indicating the relationship between the discharge time and the amount of discharge , respectively, and charging the capacitor when energized.
Charge, then forcibly discharge, then recharge
And a control discharge means, said operation control means, before the time of energization
Obtained by discharging the capacitor by the forced discharging means.
Storing the data indicating the relationship between the discharge time and the discharge amount
The above information in the event of a power outage.
Between the discharge time and the discharge amount of the capacitor when the power is restored.
Information writing / reading means for reading data indicating the relationship and the respective information from the storage means, discharge amount detecting means for detecting a discharge amount of the capacitor at the time of power recovery, and a discharge amount detecting means at the time of power recovery.
Power failure based on the amount of discharge detected by the stage and the data
Power outage time calculating means for calculating the time spent,
The power outage time calculated by the output means is stored in the storage means at the time of the power outage.
The time of the clock means is added to the stored time of the clock means.
Current time correcting means for correcting the time ; comparing the discharge amount detected by the discharge amount detecting means with a predetermined value; when the timer mode is selected and the discharge amount of the capacitor is smaller than a predetermined value, the current The time corrected by the time correcting means
The timer mode operation is continued based on the time of the clock means and the set time stored in the storage means, and the timer mode is selected when the timer mode is selected and the discharge amount of the capacitor is larger than a predetermined value. And a determination means for canceling the operation based on the information.

[0011]

[0012]

Further, it is preferable that the discharge amount of the capacitor at the time of power recovery is a difference between the charge amount of the capacitor at the time of power recovery and a reference value.

In this case, it is preferable that the reference value is a charge amount of the capacitor at the time of energization after a lapse of a predetermined time from the start of energization or a charge amount of the capacitor immediately after a power failure.

[0015]

According to the control device of the present invention, first, when energized,
The capacitor is charged sufficiently by forced discharge
At the time point, the capacitor is forcibly discharged. This and
Data indicating the relationship between the discharge time and the amount of discharge of the capacitor.
Data, and record the data with information writing / reading means.
Write it in memory. When data collection is completed
And charge the capacitor again. When a power failure occurs, the information writing / reading means of the operation control means stores information on the presence or absence of the selection of the timer mode, the time information of the clock means, and the information of the set time of the time setting means in the storage means.
During a power outage, the capacitor is discharged and its charge gradually decreases.

When the power is restored, the information writing / reading means of the operation control means reads information on the presence or absence of the selection of the timer mode from the storage means, and the discharge amount detection means detects the discharge amount of the capacitor. If the timer mode is selected before the power failure and the comparison result by the determination means indicates that the discharge amount of the capacitor is smaller than a predetermined value, the power failure time calculation means determines the discharge amount and the data.
Then, the time during which the power failure occurred is calculated based on the above. And now
By the time-of-day correction means, it is stored in the storage means at the time of power failure
At the time of the clock means calculated by the power outage time calculation means.
The electric time is added to correct the time of the clock means. Then
The current time and set before the power failure and stored in the storage means
When the time set by the time setting means
Restore the operation in the timer mode that controls the control device to the specified operation.
Attribute.

On the other hand, if the timer mode is selected before the power failure and the comparison result by the determination means is that the discharge amount of the capacitor is larger than a predetermined value, the power failure is a relatively long time. Assuming that the power plug has been disconnected from the outlet for a long time to accommodate the control device, the operation in the timer mode is released.

[0018]

[0019]

[0020]

The amount of discharge of the capacitor in the control device of the present invention is obtained from the difference between the reference value and the amount of charge of the capacitor detected at the time of power restoration.

The reference value is a charge amount of the capacitor at the time of energization after a predetermined time has elapsed from the start of energization.
This is the amount of charge when the capacitor is fully charged. Alternatively, the reference value is the charge amount of the capacitor immediately after the power failure, that is, the charge amount when the capacitor starts discharging.

[0023]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of one embodiment of the present invention, FIG. 2 is a circuit diagram showing a main part of FIG. 1, and FIG. 3 is a circuit diagram of a main part of another embodiment.

The control device with a clock function according to the present embodiment is provided, for example, in a fan heater (not shown) and controls the operation of the fan heater.

As shown in FIG. 1, the control device with a clock function is a timer mode control unit 1 which is an operation control means for controlling the operation of a clock function by a microcomputer or the like.
And a fan heater control unit 2 for controlling the operation itself of the fan heater. The control section 2 of the fan heater is provided with a mode selection section 3 for selecting a timer mode described later and a normal operation mode which is a non-timer mode. The timer mode is a timed control mode in which the operation of the fan heater is started or stopped at a desired time, and the normal operation mode is an operation mode other than the operation in the timer mode.

As shown in FIG. 1, the control section 1 in the timer mode is provided with a clock means 4 for measuring the current time and a time setting means 5 for setting an arbitrary time. The clock means 4 has a current time display section 6 for displaying the current time, and the time setting means 5 has a set time display section 7 for displaying the set time. Further, the control unit 1 in the timer mode is provided with a capacitor C that is charged when power is supplied and discharged when a power failure occurs. The capacitor C is
It is not for backing up the power supply of the control unit 1 in the timer mode, but for detecting the amount of discharge as described later. Therefore, the capacity may be smaller than that for backup. Further, the control unit 1 in the timer mode is provided with an EEPROM 8 as a nonvolatile storage means.

A backup means such as a capacitor (not shown) is provided for maintaining the power supply to the control unit 1 in the timer mode for 0.5 seconds even if the supply of electricity is stopped due to a power failure or the like. I have.

To explain each part in more detail, as shown in FIG. 1, the control unit 1 in the timer mode includes a power failure detection unit 9, an information writing / reading unit 10, a discharge amount detection unit 11, a determination unit 1
2, a power outage time calculation unit 13 and a current time correction unit 14 are provided. The power failure detection unit 9 detects that a power failure has occurred and also detects that power has been restored. Information writing / reading unit 10
When the power failure occurs, the information on the selected mode of the mode selection unit 3, the time information of the clock means 4, the time information of the time setting means 5, and the discharge data of the capacitor C described later are stored in the EEPROM.
8 and when power is restored, the EEPROM 8
The information is read from the The discharge amount detector 11 detects the amount of discharge of the capacitor C. Here, in the present embodiment, the charge amount of the capacitor C during energization after a lapse of a predetermined time from the start of energization to the capacitor C, that is, the charge amount when the capacitor C is sufficiently charged is set as a reference value. The difference between the reference value and the charge amount of the capacitor C at the time of power recovery is defined as the discharge amount of the capacitor C. In addition, this reference value is used for the capacitor C immediately after the power failure.
May be used as the charge amount.

The judging unit 12 continues the operation in the timer mode or cancels the timer mode according to the magnitude of the discharge amount of the capacitor C detected by the discharge amount detection unit 11 and a predetermined value. The power failure time calculation unit 13 calculates the power failure time based on the amount of discharge of the capacitor C at the time of power recovery. Then, the current time correction unit 14 corrects the time of the clock unit 4 based on the power failure time obtained by the power failure time calculation unit 13.

As shown in FIG. 1, the capacitor C is provided with a forced discharging means 15 for forcibly discharging the charged capacitor C when energized. To describe the circuit added to the capacitor C including the forcible discharging means 15, as shown in FIG. 2, R ₁ is charging resistor, R ₂ is a discharge resistor. Tr ₁ is an input control transistor for inputting the voltage of the capacitor C to the discharge amount detection unit 11 when the power is restored. The detection of the discharge amount is specifically a work by the CPU, and an A / D input port is used as the input port. The capacitor C is fully charged in about 3 minutes by charging resistor R _1. Tr ₂ is a charge / discharge control transistor as the forced discharge means 15 and controls charging and discharging of the capacitor C when energized. The charge / discharge control transistor Tr ₂ turns on the capacitor C when the capacitor C is sufficiently charged during energization (in this embodiment, 5 minutes after the start of energization).
Is forcibly discharged. The data indicating the relationship between the discharge time and the discharge amount at that time is processed by the CPU, and then written into the data storage unit 16 of the EEPROM 8 by the information writing / reading unit 10. The data at this time is obtained by measuring the charging voltage of the capacitor C every 10 seconds for 3 minutes by the CPU.
Enter A / D the input transistor Tr ₁ which is controlled bias by. Thus, the data storage unit 16 stores 18 data corresponding to the charging voltage value of the capacitor C every 10 seconds. When the data collection is completed, the charge / discharge control transistor Tr ₂ charges the capacitor C again.

Next, the operation of the control device of this embodiment will be described. First, after the initial energization, as described above, the forced discharge means 1
5 forcibly discharges the fully charged capacitor C, and the data write / read unit 10
After writing into the data storage section 16 of the PROM 8, the capacitor C is charged again.

When a power failure occurs, the information writing / reading unit 10 stores the information on the selected mode of the mode selection unit 3, the time information of the clock unit 4, and the time information of the time setting unit 5 in the EEPROM 8.
Write to each part of The writing to the EEPROM 8 is performed for 0.5 second while the power is kept on by the backup means (not shown). During a power outage, the capacitor C is discharged, and its charge gradually decreases.

When the power is restored, the information writing / reading unit 10
The information of the selected mode is read out from the mode storage unit 17 of the EEPROM 8 by the control unit, and the discharge amount of the capacitor C is detected by the discharge amount detection unit 11. Thus, when the timer mode is selected before the power failure, first, the charge voltage value of the capacitor C detected by the discharge amount detection unit 11 and the 18 data values stored in the data storage unit 16 of the EEPROM 8 Is determined by the determination unit 12.
If the charging voltage value of the capacitor C at the time of power restoration is smaller than the data corresponding to 3 minutes out of the 18 data, the power failure time calculation unit 13 finds the closest value among the 18 data. The time corresponding to the data is defined as a power outage time. Next, the current time correction unit 14
The time of the clock means 4 is corrected by adding the power failure time found by the power failure time calculation unit 13 to the time of the clock means 4 at the time of power failure stored in the current time storage unit 18 of the ROM 8. In this way, there is no need to reset the time of the clock means 4 again after the power is restored, and even if there is a variation in the product of the capacitor C, the discharge time and the discharge amount of the used capacitor C are not changed. Since the power outage time is calculated based on the data indicating the relationship, the time of the clock means 4 can be corrected very accurately. Then, the current time correction unit 14
Time and EEPROM of clock means 4 corrected by
The clock means 4 and the time setting means 5 are automatically set in accordance with the set time stored in the set time storage section 19 of FIG.

On the other hand, if the timer mode is not selected before the power failure, or if the timer mode is selected,
When the charge voltage value of the capacitor C detected by the discharge amount detection unit 11 is smaller than the data corresponding to three minutes out of the 18 data stored in the data storage unit 16 of the EEPROM 8, for example, Because the power outage is relatively long, such as when the power plug is disconnected from the outlet for a long time to accommodate the
Sets the operation in the normal operation mode. Thus, even if the fan heater is restarted after the power plug of the fan heater has been disconnected from the outlet for a long period of time, unexpected start and stop of the operation in the timer mode can be reliably prevented.

[0036]

[0037]

[0038]

As is apparent from the above, the control device with a timepiece function of the present invention is provided with the forced discharge means so that the power can be supplied.
At the time of discharge
Data indicating the relationship between the interval and the discharge amount to the information writing / reading means.
Therefore, since it is stored in the storage means, the capacity of the capacitor
Collect accurate data even if there are variations on the product.
Can be When power is restored, the information writing and reading means
Therefore, each written information is read from the storage means.
At the same time, the discharge amount of the capacitor is detected by the discharge amount detecting means . If the timer mode is selected before the power failure and the comparison result by the determination means indicates that the discharge amount of the capacitor is smaller than a predetermined value, the current time correction procedure is performed.
Time of the clock means corrected by a step and the storage means
Since the operation in the timer mode is resumed according to the information on the set time of the time setting means read from the time setting section, the trouble of resetting the clock means and the time setting means every time a power failure occurs can be eliminated.

The current time correction means is a means for calculating a power failure time.
The amount of discharge of the capacitor when the stage is restored, the discharge time and the discharge
Power outage time calculated based on data indicating the relationship with the amount
At the time of the power failure of the clock means read from the storage means.
Since the time of the clock means is corrected by adding the time,
Correct without being affected by variations in capacitance on the sensor product.
It is possible to correct the time of the clock means,
Thus, the operation in the timer mode can be performed accurately.
Further, the timer mode is selected before the power failure, and
If the result of the comparison by the determining means is that the discharge amount of the capacitor is larger than a predetermined value, the operation in the timer mode is canceled, so in case of a relatively long power outage, for example, a long time Even when the power plug is disconnected from the outlet for a long time, when the power plug is connected to the outlet at the next use, the operation of the fan heater is started or stopped according to the time set by the time setting means contrary to the user's intention. This can be reliably prevented.

[0040]

[0041]

Further, as described above, since the capacitor for detecting the amount of discharge is provided, it can be constructed at a lower cost as compared with the case where a large-capacity capacitor for backup at the time of power failure is provided, and the product cost is reduced. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a main part of FIG. 1;

FIG. 3 is a circuit diagram of a main part of another embodiment.

[Explanation of symbols]

1 ... operation control means, 4 ... clock means, 5 ... time setting means,
8 storage means, 10 information writing / reading means, 11 discharge amount detecting means, 12 determining means, 13 power outage time calculating means,
14 ... current time correction means, 15 ... forced discharge means, C ... capacitor.

Claims (4)

(57) [Claims] 1. Clock means for measuring the current time, time setting means for setting an arbitrary time, a capacitor which is charged when energized and discharged when a power failure occurs, and wherein the current time matches an arbitrarily set time. Operation control means capable of selecting a timer mode for controlling the controlled device to a predetermined operation when the operation is performed, information on the presence or absence of selection of the timer mode, information on the time of the clock means,
Information on the time set by the time setting means, when discharging the capacitor
A non-volatile storage means for storing data indicating a relationship between the discharge time and the discharge amount ;
Force the battery to be discharged forcibly and then recharged.
And a stage, the operation control means, the forced discharge when energized
Discharge obtained by discharging the capacitor by electric means
Data indicating the relationship between time and discharge amount is written in the storage means.
In the event of a power failure, the above information is written to the storage means and restored.
The relationship between the discharge time and discharge amount of the capacitor during
Information writing and reading means for reading data and the information from the storage means, a discharge amount detecting means for detecting a discharge amount of the capacitor at the time of power recovery, and a discharge amount detecting means at the time of power recovery.
The time during which the power failure occurred based on the amount of discharged electricity and the data
Power outage time calculating means for calculating
The calculated power outage time is stored in the storage means at the time of the power outage.
The time of the clock means by adding to the time of the clock means.
And the current time adjustment means positive for a discharge amount of the discharge amount detection means detects is compared with a predetermined value, when and discharge amount of the capacitor is timer mode is selected is smaller than a predetermined value, the current time correction Said watch hand modified by means
The timer mode operation is continued based on the time of the stage and the set time stored in the storage means, and when the timer mode is selected and the discharge amount of the capacitor is larger than a predetermined value, the timer mode operation is performed. A control device with a clock function, comprising: determination means for canceling operation. 2. The discharge amount at the time of power restoration of the capacitor is
2. The control device with a clock function according to claim 1 , wherein the difference is a difference between a charge amount when the capacitor recovers power and a reference value . 3. The method according to claim 1, wherein the reference value is a predetermined time after the start of energization.
Clock function with the control device according to claim 2, characterized in that the charging amount of the energizing time of the capacitor after that. 4. The method according to claim 1, wherein the reference value is a charge of a capacitor immediately after a power failure.
3. The control device with a clock function according to claim 2 , wherein the control value is a charge .