JPH0520717B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention provides a system for indirectly supplying electricity by setting an energization start time and energization time (energization end time) in order to supply power at night to electrical equipment such as an electric water heater. This invention relates to an improvement in a time switch for nighttime power supply that is preset (including cases in which the time is set) 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 via the transformer 2, it lights up the energization indicator 3, outputs a constant voltage to the frequency dividing circuit 4, and outputs a constant voltage to the crystal resonator 5.
make it work. The frequency dividing circuit 4 divides the oscillation frequency of the crystal resonator 5 and drives 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 via a transmission mechanism such as gears. At the position on the dial plate 10 indicating the desired time, there is a dial 1.
1 and a cutting claw (not shown) are attached, and at a desired time, the cutting claw 11 hits the switch driving cam 12 to turn 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, when a power outage occurs during nighttime power hours, the quartz motor 6 is driven by the power outage compensation battery 7.
The dial plate 10 advances in the same way during a power outage as it does when the power is on.
The switch 13 is turned off after the set energization time. Therefore, the actual energization time is shorter than the set energization time by the power outage time. Especially when using an electric water heater as a load, the water will not boil, resulting in the worst possible outcome of running out of hot water, which is very inconvenient.

Such problems also exist in conventional electronic time switches.

In order to solve this problem, it is possible to turn on electricity for the duration of the power outage after the energization time ends.
This is proposed in Japanese Patent No. 172282, but since it is not known how long the electricity will last for the duration of the power outage, the user is not sufficiently notified of the time switch operation.

(Date of the Invention) An object of the present invention is to provide a time switch for nighttime power supply that can inform the user of the length of time that electricity will be extended due to a power outage in a form that is easy to compare with the current time. That's true.

(Characteristics of the Invention) In order to achieve the above object, the present invention provides a power outage time measuring means for timing a power outage time during a power-on time zone;
There is a power outage time memory that stores the power outage time, and after the energization time ends, the power is turned on for the power outage time stored in the power outage time memory, and the power outage time that is energized is set as the power outage supplementary time, and the power outage supplementary time is set as the power outage supplementary time. A calculation means that performs a subtraction process according to the elapse of the power supply time of hours, and a current time/power outage supplementary time display that alternately displays the current time and the power outage supplementary time during the power outage supplementary time are provided. It is characterized by subtraction processing and alternate display with the current time.

(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
The voltage is stepped down, converted into a DC voltage by the AC/DC conversion means 17, and 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 setting means 26 is a mode switch 2 shown in FIG.
7. Consists of a first setting switch 28 and a second setting switch 29. As shown in FIG. 2, on the display board 30 there is a current time/power outage supplementary time display 3.
1. An energization start time indicator 32 and an energization time indicator 33 are provided. energization start time memory 34;
Memory 35 for power on time and memory 36 for power outage time
stores the energization start time, energization time, and power outage time, respectively. The output means 37 is controlled by the calculation means 22 to turn on and off the output relay 38. 3
9 is an output terminal.

To explain the setting operation, pressing the mode switch 27 once from the operation mode changes to the time setting mode, and pressing the first setting switch 28 changes the current time displayed on the current time/power outage supplementary time display 31. Time advances, and by pressing the second setting switch 29, the current time is advanced by minutes, and the current time of the clock means 23 is corrected via the calculation means 22.

From the operation mode, press the mode switch 27 twice to enter the energization time setting mode, and press the second setting switch 29 to set the energization time display 3.
The energization time displayed in 3 is changed in units of 30 minutes (or in units of 1 minute), and the contents of the energization time memory 35 are updated via the calculation means 22.

Press the mode switch 27 three times from the operation mode to enter the energization start time setting mode.
By pressing the setting switch 28, the hour displayed on the energization start time display 32 advances, and by pressing the second setting switch 29, the minutes advance, and the contents of the energization start time memory 34 are updated via the calculation means 22. Updated.

After each setting, the mode switch 27 is pressed four times counting from the operation mode, or when three minutes have elapsed after each setting is completed, the operation mode is returned to.

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. In step 1, the calculation means 22 compares the current time of the clock means 23 with the energization start time stored in the energization start time memory 34, and when they match, proceeds to step 2 and outputs via the output means 37. Turn on relay 38. As a result, power is supplied to the load electrical equipment connected to the output terminal 39. In step 3, it is determined whether or not there has been a power outage. Since the current operation is normal and there is no power outage, proceed to step 4. In step 4, the calculation means 22 reads the energization time from the energization time memory 35, calculates the energization time end time by adding the energization time to the energization start time, and determines the end of the energization time by comparing it with the current time. . The routine of steps 2 to 4 is repeated until the energization time ends, and then the routine advances to step 5. In step 5, it is determined whether or not the power outage time is stored in the power outage time memory 36. However, since the power outage time is not stored, the process proceeds to step 6, and the current time/power outage supplementary time display 31 shows the current time. Display only the time. Then, in step 7, the output relay 38 is turned off. As a result, power supply to the electrical equipment of the load is stopped.

As shown in Figure 4, the power outage time d
The operation when a power outage occurs from the time e to the power restoration time e will be explained.

When a power outage occurs during power supply, the power outage detection means 21
detects a power outage and inputs a power outage detection signal to the calculation means 22. As a result, the calculating means 22 proceeds from step 3 to step 8, and the power outage time measuring means 22
5 to time the power outage. In step 9, by stopping the input of the power failure detection signal, the calculation means 2
2, when it is determined that the power has been restored, ends the counting of the power outage time in step 10, and stores the power outage time measured by the power outage time measuring means 25 in the power outage time memory 36 in step 11. When the power-on time ends,
Proceeding from step 5 to step 12, the power outage time stored in the power outage time memory 36 is read out.
In step 13, the power outage time is set in the internal register of the calculating means 22 as the power outage supplementary time. step
At step 14, the calculating means 22 alternately outputs the current time and the power outage supplementary time to the current time/power outage supplementary time display 31 to display the current time and power outage supplementary time alternately. In step 15, the power outage supplementary time is subtracted every time the time elapses. In step 16, it is determined whether the subtracted power outage supplementary time becomes zero. The routine of steps 13 to 16 is repeated until the power failure supplementary time becomes zero, during which time the output relay 38 is kept in the on state, and the power failure supplementary time is displayed alternately with the current time. Then, when determining the end of the power outage supplementary time,
In step 6, the current time/power outage supplementary time display 31
Only the current time is displayed, and in step 7 the output relay 38 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. Furthermore, upon completion of the power outage supplementary time, the calculating means 22 clears the stored contents of the power outage time memory 36.

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. Also, the current time/
The alternating display of the power outage supplementary time display 31 allows the user to know the power outage supplementary time, so that the user can confirm that there is no fear of running out of hot water due to a power outage.

(Modification) In the illustrated embodiment, the current time and power outage supplementary time are displayed alternately by the current time/power outage supplementary time display 31, but they may be displayed independently by separate displays. .

The illustrated embodiment shows an electronic time switch in which the calculating means 22, the clock means 23, and the power outage time measuring means 25 can be configured by one microcomputer, but the present invention is similar to the one shown in FIG. It can also be applied to a time switch having a mechanical clock mechanism.

In the flowchart of FIG. 3, the power outage supplementary time is subtracted and displayed as time passes, but the power outage supplementary time may be displayed without subtraction, and the display may be made to disappear at the same time as the power outage supplementary time ends. Further, although the power outage supplementary time is displayed from the end of the power supply time, the power outage supplementary time may be displayed from the time the power is restored. Furthermore, only when power is restored during the power on time period, power is extended for the duration of the power outage, but if power is restored after the power on time ends,
The power may be turned on immediately after the power is restored only for the duration of the power outage within the power-on time zone.

(Effects of the Invention) As explained above, according to the present invention, there is provided a power outage time measuring means for timing a power outage time during a power-on time period;
There is a power outage time memory that stores the power outage time, and after the energization time ends, the power is turned on for the power outage time stored in the power outage time memory, and the power outage time that is energized is set as the power outage supplementary time, and the power outage supplementary time is set as the power outage supplementary time. A calculation means that performs a subtraction process according to the elapse of the power supply time of hours, and a current time/power outage supplementary time display that alternately displays the current time and the power outage supplementary time during the power outage supplementary time are provided. Since the time is subtracted and displayed alternately with the current time, the user can be informed of the length of time that electricity will be extended due to a power outage in a format that is easy to compare with the current time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a front view, FIG. 3 is a flow chart showing the operation of an embodiment of the present invention, FIG. 4 is a time chart showing the operation of an embodiment of the present invention, and FIG. 5 is a conventional time switch. FIG. 17...AC/DC conversion means, 19...Battery for power outage compensation, 21...Power outage detection means, 22...Calculating means, 23...Clock means, 25...Power outage time measuring means, 26...Setting means, 31...Current time/power outage supplementary time display, 32...Power start time display,
33... Energization time indicator, 34... Energization start time memory, 35... Energization time memory, 36...
Memory for power outage time, 37... Output means, 38...
output relay.

Claims (1)

[Claims] 1 The energization start time and energization time are set in advance,
A time switch for nighttime power supply that operates even during a power outage includes: a power outage time clock that measures the power outage time during the power on time; a power outage time memory that stores the power outage time; and a power outage time memory that stores the power outage time after the power outage ends. a calculation means for energizing the power outage for the power outage time stored in a memory, defining the power outage time as the power outage supplementary time, and calculating the power outage supplementary time according to the elapse of the power supply time for the power outage time; A time switch for nighttime power supply, characterized in that it is provided with a current time/power outage supplementary time display that alternately displays the current time and the power outage supplementary time during hours.