JPS63292093A - Time switch for night power supply - Google Patents

Abstract

PURPOSE:To prevent inadvertent energization, by supplementing a power failure time to secure an energization time for a load while an function of energization for a power failure supplement time is refused to be performed when power is restored with the passage of an energization time zone more than twice after a power failure occurs. CONSTITUTION:When power is restored with the passage of two energization time zones after a power failure occurs, a total time of power failure exceeds 24hr plus energization time counted by a power failure energization time counting means 26. Hence, at the second energization time zone, the total time of power failure is counted by a power failure time counting means 25 to clear the power failure time stored 37. When power is restored before the entry of the third energization time zone, the counting contents of the means 26 are cleared and an normal operation is performed. When the restoration of power takes place during the entry of the third energization time zone, the turning on of an output relay 39 is forbidden until the end of the third energization time zone. In this manner, an energization time, for example, 8hr is guaranteed even in case of a power failure. This can secure sufficient energization time to boil up water when an electric water heater is loaded thereby preventing inadvertent energization.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention provides for indirect energization by setting the energization start time and energization time (energization end time) in order to supply nighttime power to electrical equipment such as electric water heaters. (including cases where time is set)
This invention relates to an improvement of a time switch for night power supply that is set in advance and operates even during a power outage.

(Background of the Invention) An example of a conventional time switch for nighttime power supply is shown in FIG.

When the DC constant voltage circuit 1 is supplied with power through the transformer 2, it turns on the energization indicator 3 and turns on the frequency divider circuit 4.
A zero frequency divider circuit 4 outputs a constant voltage to operate the crystal resonator 5, and divides the oscillation frequency of the crystal resonator 5 to drive the quartz motor 6.

The power failure compensation battery 7 supplies power to the frequency dividing circuit 4 during a power failure. The quartz motor 6 rotates a motor rotation display plate 8, a 60-minute dial/fine adjustment plate 9, and a dial plate 10 through a transmission mechanism such as a gear.

A required wind 11 and a cut wind (not shown) are attached to the dial plate 10 at a position indicating the desired time, and when the desired time comes, the required wind 11 hits the switch drive cam 12 and turns on the switch 13. .

Furthermore, the switch 13 is turned off when the cutting claw hits the switch drive cam 12. 14 is a time display hand.

In the time switch shown in FIG. 5, if a power outage occurs during the energized time period, the quartz motor 6 is driven by the power outage compensation battery 7, so the dial plate 10 advances during the power outage in the same way as when the power is on, and the settings can be set. After the energization time has elapsed, the switch 13 is turned off. Therefore, the actual power-on time will be shorter than the set power-on time by the power outage time.Especially when using an electric water heater as a load, the water will not boil, leading to the worst possible result of running out of hot water. , which was very inconvenient.

Such problems also exist in conventional electronic time switches.

(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems, to be able to guarantee a predetermined energization time to the load even in the event of a power outage, and to be able to supply power for the first time when newly installed. To provide a time switch for nighttime power supply that can prevent inadvertent energization when the time is outside the energization time zone.

(Features of the Invention @) In order to achieve the above object, the present invention includes: a power outage time measuring means for counting the power outage time during the power-on time zone; a power outage time memory for storing the power outage time; a power outage total time measuring means for counting the total power outage time not limited to the power on time period (power supply time); , the total power outage time is (24
When the power is restored after a time equal to or longer than the power-on time, the power outage time measuring means and calculation means for clearing the power outage time in the power outage time memory are provided to supplement the power outage time and calculate the actual power to the load. If the power is restored after two or more power-on periods have elapsed after a power outage occurs, it will be treated as a power-on for a new installation, and the power-on function will be activated during the power outage supplementary time. It is characterized by not forcing people to work.

(Embodiment of the Invention) FIG. 1 shows a block diagram of an embodiment of the invention, and FIG. 2 also shows a front view.

In FIG. 1, when power is supplied to the power supply connection terminal 15, the power supply voltage is stepped down by the transformer 16, and the A
The voltage is converted into a DC voltage by the C/DC conversion means 17, and is supplied to each part as a control power source via a diode 18.

During a power outage, control power is supplied to each part from the power outage compensation battery 19 via the diode 20. The power outage detection means 21 detects a power outage and causes the calculation means 22 to input a power outage detection signal.

The clock means 23 measures the current time in synchronization with the oscillation frequency of the crystal oscillator 24. The power outage time measuring means 25 measures the power outage time during the energized time period. The power outage total time measuring means 26 measures the total power outage time of (24 hours, 10 energization hours) or more, not only during the energization time period. The setting means 27 includes a mode switch 28, a first setting switch 29, and a second setting switch 30 shown in FIG. As shown in FIG. 2, on the display board 31 are provided a current time display 321, an energization start time display 33, and an energization time display 34; a memory 35 for energization start time; a memory 36 for energization time; The power outage time memory 37 stores the energization start time, the energization time, and the power outage time. The output means 38 is the calculation means 2
2, the output relay 39 is turned on and off. 4
0 is an output terminal.

To explain the setting operation, pressing the mode switch 28 once from the driving mode changes to the time setting mode, pressing the first setting switch 29 advances the time currently displayed on the time display 32, and changes to the second setting. By pressing the switch 30, the minutes advance, and the current time of the clock means 23 is corrected via the calculation means 22.

From the driving mode, press the mode switch 28 twice to enter the energization time setting mode, and press the second setting switch 30 to change the energization time displayed on the energization time display 34 in units of 30 minutes (or 1 minute). ),
The contents of the energization time memory 36 are updated via the calculation means 22.

By pressing the mode switch 28 three times from the operation mode, the energization start time setting mode is entered, and the first setting switch 2
By pressing 9, the hour displayed on the energization start time display 33 advances, and by pressing the second setting switch 30, the minutes advance, and the contents of the energization start time memory 35 are updated via the calculation means 22. Ru.

After each setting, mode switch 2B counting from the operation mode
Press 4 times or after 3 minutes have passed after completing each setting, the machine will return to operation mode.

Next, the operation in the driving mode will be explained with reference to the flowchart of FIG. 3 and the time chart of FIG. 4.

First, the normal operation shown in FIG. 4 will be explained. The calculation means 22 is
In step l, it is determined whether there is a power outage or not, and the operation is normal now.
Since this is a case where there is no power outage, proceed to step 2. In step 2, the time measurement contents of the power outage total time counting means 26 are cleared, but this is irrelevant at this point. In step 3, the current time of the 1 clock means 23 and the start of energization are cleared. The energization start time stored in the time memory 35 is compared, and when they match, the process proceeds to step 4 and the output relay 39 is turned on via the output means 38. As a result, power is supplied to the load electrical equipment connected to the output terminal 40. In step 5, it is determined whether there has been a power outage. There is no power outage, so step 6
The calculation means 22 reads the energization time from the energization time memory 36, calculates the energization end time by adding the energization time to the energization start time, and compares it with the current time to determine the end of the energization time. The routine of steps 5 and 6 is repeated until the time ends, and when the time ends, the routine proceeds to step 7.

It is determined whether the power outage time is stored in the power outage time memory 37, but since the power outage time is not stored, the process proceeds to step 8 and the output relay 39 is turned off. As a result, power supply to the electrical equipment of the load is stopped.

We will explain the operation when a power outage occurs during the power supply time.

When a power outage occurs during the energization time, the power outage detection means 21 detects the power outage and inputs a power outage detection signal to the calculation means 22. As a result, the calculating means 22 proceeds from step 5 to step 9, and causes the total power outage time measuring means 26 to count the total power outage time. Since the total power outage time has not exceeded 24 hours yet, proceed from step IO to step 11.
In step 11, it is determined whether the current time coincides with the energization start time. Since the current time has passed the energization start time, the process jumps to step 12. In step 12, it is determined whether or not this time is within the energization time period. Since it is within the energization time period, the process proceeds to step 13, and the power outage time measuring means 25 is caused to time the power outage time. Step 2 14
Then, by stopping the input of the power failure detection signal, the calculation means 22
When it is determined that the power has been restored, the clocking of the power outage time is ended in step 15, and the power outage time measured by the power outage time measuring means 25 is stored in the power outage time memory 37 in step 16.Next, in step 17, the power outage time is stored. Clear the time measurement contents of the total time measurement means 26, return to step 4, and proceed to step 6.
Proceed until. When it is determined in step 6 that the energization time has ended, the process proceeds from step 7 to step 18, where the power outage time stored in the power outage time memory 37 is read out and set in the internal register of the calculation means 22 as the power outage supplementary time. After determining the power outage in step 19, the process proceeds to step 20, where the end of the power outage supplementary time is determined by comparing the time obtained by adding the power outage supplementary time to the power supply time end time with the current time. While the end is not determined, steps 19 to 2
0 is repeated to keep the output relay 39 in the ON state. Then, when it is determined that the power failure supplementary time has ended, the output relay 39 is turned off. As a result, the power supply to the electrical equipment of the load is extended by the time of the power outage.

The operation in case 1 shown in FIG. 4, that is, when power is restored during the second energization period after a power outage occurs, will be described.

When a power outage occurs, the process proceeds from step 1 to step 9, and the total power outage time measuring means 26 is made to measure the total power outage time. If the power outage continues and the power is turned on for the first time, the routine of Step 9 - Step 1O - Step 11 - Step 12 - Step 21 is repeated before entering the first power on time period.When the power outage continues and the power is turned on for the first time, the power outage time is determined in Step 22. The time measurement contents of the timer 25 and the memory contents of the power outage time memory 37 are cleared, and in step 13, the power outage time timer 25 is caused to measure the power outage time. Within the first energization time period, the routine of step 9 - step 10 - step 11 - step 12 - step 13 - step 14 - step 23 is repeated. When the first energization time period is exceeded, the process advances from step 23 to step 24. , completes the measurement of the power outage time, and proceeds to step 25.
The power outage time measured by the power outage time measuring means 25 is stored in the power outage time memory 37. After this, step 9
Return to From the end of the first energization time period to the start of the second energization time period, the total power outage time measuring means 26 continues to measure the total power outage time. When the second energization time period begins, the time measurement contents of the power outage time measuring means 25 and the memory contents of the power outage time memory 37 are cleared in step 22, and in step 13
Then, the power outage time measuring means 25 is made to measure the power outage time again.

In case l, the power is restored within the second power-on time period, so when the calculation means 22 determines that the power has been restored in step 14, the time measurement of the power outage time is finished in step 15, and the power outage time measurement means 25 starts counting the time in step 16. Then, in step 17, the time measurement contents of the total power outage time counting means 26 are cleared, and the process returns to step 4, where the output relay 39 is turned on. Then, by proceeding with steps 5 to 7.18 to 20.8,
During the power supply time after power restoration and integrated into it (power outage supplementary time e)
4), the output relay 39 is kept in the ON state.

The operation will be described in case 2 shown in FIG. 4, that is, when power is restored after two energization periods have elapsed since the occurrence of a power outage.

If the power outage continues for a long time like this, it is due to inventory after the product is completed. In case 2, the total power outage time measured by the power outage total time measuring means 26 is (2
Since the power outage time exceeds 4 hours (10 energization hours), the process proceeds from step 10 to step 26 to step 27, and the power outage time measured by the power outage time measuring means 25 and stored in the power outage time memory 37 during the second energization period is counted. clear. If the power is restored before entering the third power-on time period, the process goes from step 28 to step 8 and step 1, and then step 2.
Clears the time measurement contents of the power outage total time measuring means 26 and performs normal operation according to the normal operation routine of steps 3 to 8. Since the power outage time is cleared in this way, the energization function for the power outage supplementary time does not work. do not have.

When the power is restored after entering the third power-on time period, the process proceeds from step 28 to step 29, and once it is determined that the power has been restored, steps 29 to 3 are performed until the third power-on time period ends.
0 is repeated and the output relay 39 person is prohibited.

According to this embodiment, a power-on time of, for example, 8 hours is guaranteed even in the event of a power outage, so when an electric water heater is used as a load, sufficient power-on time to boil water can be secured. , you can prevent the worst situation of running out of hot water.

It also measures and memorizes the power outage time during the power on hours.

After the power supply time ends, the power outage time will be used as power outage supplementary time.
Alternatively, if you turn on the power after the power is restored, even if the power outage continues for a long time due to inventory after the product is completed, etc., the power outage time (equal to the power on time) will be measured and stored, so power will be supplied for the first time when the product is newly installed. Even if the point in time is outside the energization period, the energization function based on the power outage supplementary time is activated immediately, causing the load to be inadvertently energized, which is a safety problem. On the other hand, according to this embodiment, if the power is restored after two or more power-on periods have passed after a power outage occurs, it is considered to be a power-on for a new installation, and the power-on function during the power outage supplementary time is not set to 1@. That's why it's safe.

(Modification) The illustrated embodiment shows an electronic time switch in which the calculating means 221, the clock means 23, the power outage time measuring means 25, and the power outage total time measuring means 26 can be configured by one microcomputer. The invention can also be applied to a time switch having a mechanical clock mechanism as shown in FIG.

(Effects of the Invention) As described above, according to the present invention, there is provided a power outage time measuring means for counting the power outage time during the power on time period, a power outage time memory for storing the power outage time, and a power outage time memory for storing the power outage time. a power outage total time measuring means for counting the total power outage time (time) or more, not limited to the energization time zone, and after the end of the energization time, energizes the power outage time stored in the power outage time memory as a power outage supplementary time; The total power outage time is (24
When the power is restored after the above-mentioned power-on time (hours) or more.

The power outage time measuring means and the calculation means for clearing the power outage time in the power outage time memory are provided, and the power outage time is supplemented so that the actual energization time to the load becomes equal to the set energization time. In addition, if the power is restored after two or more energization periods have passed after a power outage, it is considered to be the power on for a new installation, and the energizing machine part is not activated during the power outage supplementary time, so there was a power outage. It is possible to guarantee a predetermined energization time for the load even in cases where the load is energized, and to prevent inadvertent energization when power is supplied for the first time during a new installation outside of the energization period. .

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a flowchart showing the operation of an embodiment of the invention, and Fig. 4 is a block diagram showing an embodiment of the invention. A time chart showing the operation, FIG. 5 is a schematic diagram showing a conventional time switch. 17...A C/D C conversion means, 19. Old.
- Power outage compensation battery, 21...Power outage detection means, 2
2...Calculating means, 23...Clock means,
25... Power outage time measuring means, 26...
Power outage total time measuring means, 27...Setting means, 3
2... Current time display, 33... Energization start time indicator, 34... Energization time indicator, 3
5...Memory for energization start time, 36...
- Memory for energization time, 37... Memory for power outage time, 38... Output means, 39... Output relay.

Claims (1)

[Claims] (1) A time switch for night power supply in which the energization start time and the energization time are set in advance and operates even in the event of a power outage, including a power outage time measuring means for timing the power outage time during the energization time period, and storing the power outage time. Memory for power outage time and (
A power outage total time measuring means for counting the total power outage time of 24 hours + the power-on time) or more, regardless of the power-on time period; and a calculation means for clearing the power outage time in the power outage time clock and the power outage time memory when the power is restored after the total power outage time is equal to or longer than (24 hours + the power supply time). Features a time switch for night power supply.