JP2000079055A - Heat insulation pot control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely reduce power consumption during time counting action or in an off condition, and prevent consumption of a battery to the utmost when supply of a power source voltage is disconnected. SOLUTION: Action of a switching power source circuit 7 is stopped even during time counting action or in an off condition. Power consumption is thus reduced. An action voltage Vcc is supplied from either a primary battery 21 or a solar battery 35 to a microcomputer 36 during the time counting action or in the off condition. As far as the action voltage Vcc is supplied from the solar battery 35 to the microcomputer 36, consumption of the primary battery 21 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated pot control device which needs to continue operating the control means even when the supply of power supply voltage is interrupted due to a power failure or the like.

[0002]

FIG. 3 shows a conventional heater control device. In FIG. 1, reference numeral 1 denotes a power plug for taking in, for example, a commercial AC power supply of 100 V, reference numeral 2 denotes a warming heater, and reference numeral 3 denotes a rice cooking heater. The AC power supply voltage supplied from the power supply plug 1 is stepped down by the transformer 4. The voltage induced in the secondary winding of the transformer 4 is full-wave rectified by a rectifying diode 5 such as a diode bridge, smoothed by a capacitor 6, and converted to a DC input voltage of about 20 V, for example.

A switching power supply circuit 7 is a non-insulated step-down type power supply circuit for reducing a DC input voltage generated between both ends of the capacitor 6 and supplying a predetermined DC output voltage Vp to an output side. This switching power supply circuit 7
In order to realize size reduction and cost reduction, the configuration is such that an insulating transformer for power conversion is not interposed. Specifically, one end of the capacitor 6 is
The emitter of the N-type switching transistor 8 is connected, the cathode of the diode 9 is connected to the collector of the switching transistor 8, and the anode of the diode 9 is grounded together with the other end of the capacitor 6. Further, between both ends of the diode 9, that is, the switching transistor 8
Is connected to a series filter circuit composed of a choke coil 10 and a capacitor 11 so that the switching power supply circuit 7
Is configured. Thereby, the switching transistor 8
Are averaged by a filter circuit comprising a choke coil 10 and a capacitor 11 at the subsequent stage so that a DC output voltage Vp lower than the DC input voltage generated across the capacitor 6 is obtained. ing.

[0004] The switching power supply circuit 7 includes, as a feedback loop for stabilizing the DC output voltage Vp, voltage dividing resistors 12 and 13 for dividing the DC output voltage Vp and outputting a detection voltage Vp '; An error amplifier 15 is provided which outputs a drive signal to be supplied to the transistor 16 and thus the base of the switching transistor 8 based on the result of comparison between Vp 'and the reference voltage Vd obtained from the reference power supply 14. A resistor 17 is connected between the collector of the PNP transistor 16 and the base of the switching transistor 8, the emitter of the transistor 16 is grounded, and a resistor for dividing the voltage from the error amplifier 15 is connected to the base of the transistor 16. 18, 19 are connected. That is,
When the drive signal from the error amplifier 15 is turned on, that is, at the H level, the transistor 16 and the switching transistor 8 are turned on. Conversely, when the drive signal from the error amplifier 15 is turned at the L level, the transistor 16 and the switching transistor 8 are also turned off. It is configured to be.

When the DC output voltage Vp decreases and the proportional detection voltage Vp 'becomes lower than the reference voltage Vd, the output terminal of the error amplifier 15 becomes H level, and the transistor 16 and the switching transistor 8 turn on.
The lowered DC output voltage Vp recovers. On the contrary,
When the detection voltage Vp 'becomes higher than the reference voltage Vd, the output terminal of the error amplifier 15 becomes L level,
16 and the switching transistor 8 are turned off, and the supply of current from the switching transistor 8 to the choke coil 10 is stopped. In this way, the on / off of the switching transistor 8 is controlled by the drive signal from the error amplifier 15 so as to maintain a substantially constant DC output voltage Vp.

A capacitor 11 for generating a DC output voltage Vp
A constant voltage IC 20 composed of, for example, a three-terminal regulator or the like is connected between both ends of the power supply. The constant voltage IC 20 operates at an operating voltage Vcc different from the DC output voltage Vp, for example, DC +5 V
It is for obtaining. A series circuit of a primary battery 21 for supplying an operating voltage to a microcomputer 23 serving as control means, which will be described later, and a diode 22 for preventing backflow, between the two ends on the output side of the constant voltage IC 20, separately from the switching power supply circuit 7. Is connected. The primary battery 21 is a backup battery when power supply to the power supply is stopped, such as when a power failure occurs. For example, a charging capacitor may be used.

Reference numeral 23 denotes a microcomputer (hereinafter, referred to as a microcomputer) as control means built in the heat retaining pot. The microcomputer 23 has a function of executing all operations related to the heating pot, such as rice cooking and heat keeping, according to a control sequence of a program stored and stored in a storage unit (not shown) in advance. The microcomputer 23 operates by supplying the operating voltage Vcc.

An input port of the microcomputer 23 includes a rice cooker switch 24, a warming switch 25, and a timer switch as a time measuring means.
26, off switch 27, etc., a plurality of operation switches to operate when performing various settings, a resistor 28 for power failure detection,
29 etc. are connected. The rice cook switch 24 is operated when rice cooking is started, and the heat insulation switch 25 is operated when heat insulation is performed. Timer switch 26
Is operated when the time keeping operation, that is, the timer operation, of the insulated pot for starting or ending the rice cooking operation at a predetermined time is performed, and when the off switch 27 is pressed, the operation of the insulated pot such as rice cooking and heat keeping is stopped. The power supply to the warming heater 2 and the rice cooking heater 3 is forcibly stopped in the off state.

An output port of the microcomputer 23 has an LCD (Liquid Crystal Display) 30 for displaying a rice cooking course, a current time, a reservation time for timer rice cooking, and the like, and a coil contact 31 of the warming heater 2 and the rice cooking heater 3. , 32 are connected. And the microcomputer 23
Based on the switch input information from the rice cooker switch 24, the warming switch 25, the timer switch 26, and the off switch 27,
The display of the LCD 30 is controlled, and a drive signal is supplied to the relay 33 to open and close the coil contacts 31 and 32, thereby controlling the power cutoff of the warming heater 2 and the rice cooking heater 3, respectively.

Although not shown, the microcomputer 23 has two crystal oscillators having different oscillation frequencies. Then, when executing the normal mode such as rice cooking and heat keeping, the microcomputer 23 is operated by the crystal oscillator having a high oscillation frequency, while the timer switch 26 is pressed to perform the timer operation, or the off switch 27 is pressed to be in the off state. In this case, the mode shifts to a low power consumption mode in which the microcomputer 23 is operated by a crystal oscillator having a low oscillation frequency. In this low power consumption mode, oscillation is almost stopped compared to the normal mode, so that the power consumption of the microcomputer 23 can be reduced. Also, the microcomputer 23 shifts to the low power consumption mode when the microcomputer 23 detects the interruption of the power supply voltage such as the occurrence of a power failure due to the decrease in the potential of the connection point between the resistors 28 and 29. In this case, the operation voltage Vcc is supplied from the primary battery 21 to the microcomputer 23 by cutting off the output from the constant voltage IC 20.

[0011] The control device of the above-mentioned prior art is as follows.
When displaying the timer operation and the current time, the microcomputer 23
It is necessary to always operate the clock circuit mounted on the device. Even when the power switch is turned off by pressing the power switch 27, the coil contacts 31, 32 are turned off by the relay 33, and the heater 2 and the rice cooker are cooked. By simply turning off the heater circuit such as the heater 3, the switching power supply circuit 7 for energizing the microcomputer 23 is always energized. Therefore,
During the off state where rice cooking and heat insulation are not performed, or during the timer operation for starting rice cooking after a predetermined time, the switching power supply circuit is in spite of the reduced power consumption of the microcomputer 23 itself in the low power consumption mode. 7 consumes power, so that there is a problem that the power consumption of the insulated pot is not reduced.

The clock circuit mounted on the microcomputer 23 is
The operation cannot be stopped. Therefore, when power supply is cut off from the power plug 1 such as when a power failure occurs or the power plug 1 is unplugged (it is assumed that the power plug is carried to a table without an outlet for serving, etc.), the backup is performed. From primary battery 21 to microcomputer
Power is supplied to the battery 23, but the capacity of the primary battery 21 is limited, and the battery capacity is instantly exhausted. In other words, when the supply of the power supply voltage is cut off, there is a problem that the clock operation cannot be continued for a long time unless the current consumption of the primary battery 21 is reduced by some method.

[0013] In view of the above problems, the present invention can reliably reduce power consumption during a timekeeping operation or in an off state, and can minimize battery consumption when power supply is cut off. It is an object of the present invention to provide an insulated pot control device that can be prevented.

[0014]

According to a first aspect of the present invention, in order to achieve the above object, there is provided an insulated kettle control device, comprising: a control unit capable of converting to a low power consumption mode; A power supply for supplying an operating voltage to the means, a battery or a charging device for supplying an operating voltage to the control means separately from the power supply, a switch for stopping each operation of the insulated pot to turn off, and an insulated pot. In the insulated pot control device provided with a timekeeping means for performing a timekeeping operation, a solar cell having a larger output voltage than the battery or the charging device, a backup means for connecting the battery or the charging device in parallel and backing up the power supply, When the supply of the power supply voltage is cut off, or during the timekeeping operation or the off state, the operation of the power supply circuit is stopped and switched to either the battery or the charging device and the solar cell. , In which a switching means for supplying an operating voltage to said control means.

According to the above configuration, the power supply operation is stopped not only when the supply of the power supply voltage is cut off, but also during the timekeeping operation or the cut-off state, while the power supply to either the battery or the charging device and the solar cell is stopped. Since the switching is performed and the operating voltage is supplied to the control means, it is possible to reduce the power consumption during the clocking operation or during the off state as compared with the conventional one. Also,
Since the solar cell is connected in parallel with the battery or the charging device, at least as much light as the fluorescent lamp is illuminating the solar cell, the operating voltage can be supplied from the solar cell to the control means, The consumption of the battery or the charging device can be prevented.

According to a second aspect of the present invention, in order to attain the above object, there is provided a control device for controlling an insulated kettle, wherein a control means capable of converting to a low power consumption mode, and an operating voltage is supplied to the control means when a power supply voltage is supplied. A power supply, a battery or a charging device for supplying an operating voltage to the control means separately from the power supply, a switch for stopping each operation of the insulated kettle to turn off, and a timing means for timing the insulated kettle. And a backup means for connecting a solar cell having a larger output voltage than the battery or the charging device in parallel with the battery or the charging device to back up the power supply, and detecting surrounding light and shade. Monitoring means, when the supply of the power supply voltage is cut off, during the timekeeping operation or during the off state,
Stopping the operation of the power supply, switching to either the battery or the charging device and the solar cell, and supplying an operating voltage to the control means, and detecting that the surroundings have become dark by the monitoring means, Switching means for restarting the operation of the power supply.

According to the above configuration, the power supply operation is stopped not only when the supply of the power supply voltage is cut off, but also during the timekeeping operation or the cutoff state, while the power supply to either the battery or the charging device and the solar cell is stopped. Since the switching is performed and the operating voltage is supplied to the control means, it is possible to reduce the power consumption during the clocking operation or during the off state as compared with the conventional one. Also,
Since the solar cell is connected in parallel with the battery or the charging device, at least as much light as the fluorescent lamp is illuminating the solar cell, the operating voltage can be supplied from the solar cell to the control means, The consumption of the battery or the charging device can be prevented.

Further, when the operating voltage is supplied from the solar cell to the control means, if the light from the solar cell is not irradiated, the operating voltage is originally supplied from the battery connected in parallel. When the monitoring unit detects that the surroundings have become dark, the switching unit restarts the operation of the power supply. Therefore, as long as the supply of the power supply voltage is not interrupted, the operating voltage is supplied to the control means through the power supply, and it is possible to effectively prevent the consumption of the battery.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a heating pot control device according to the present invention will be described with reference to FIGS. In FIGS. 1 and 2, FIG.
The same reference numerals are given to the same portions as those in the circuit diagram of FIG. 1, and detailed description of the common portions is omitted.

FIG. 1 is a circuit diagram showing a first embodiment of a heat retaining pot control device according to the first aspect of the present invention. In the figure, a series circuit of a solar cell 34 and a diode 35 for backflow prevention is connected across the output side of the constant voltage IC 20 in parallel with a series circuit of a primary battery 21 and a diode 22 as a backup power supply, Thus, a backup circuit 38 for backing up the microcomputer 23 is configured. Here, the voltage on the output side of the constant voltage IC 20 is the operating voltage V of the microcomputer 23.
It is set to + 5V which is cc.

The collector of an NPN transistor 37 is connected to the base of the transistor 16 and the transistor
The base of the switch 37 is connected to the OUT terminal (Po) 36 of the microcomputer 23, and the emitter of the transistor 37 is grounded. The switching circuit 39 for supplying the operating voltage Vcc to the microcomputer 23 is constituted by the primary battery 21 or the solar battery 34 which stops the operation of the microcomputer 23. The other configuration is the same as that shown in FIG.
Is the same as

Next, the operation of the above configuration will be described. When a normal mode such as a normal mode of rice cooking and heat retention is performed, a predetermined power supply voltage is supplied from the power plug 1, and the switching power supply circuit 7 performs a predetermined operation to output a stable DC output voltage Vp. I do. Therefore, the operating voltage Vcc is supplied from the constant voltage IC 20 to the microcomputer 23, and the microcomputer 23 uses a crystal oscillator having a high oscillation frequency.
23 works. In this case, both the diode 22 and the diode 35 are non-conductive, and the primary battery
There is no current supply from 21 or solar cell 34. Also, microcomputer
The OUT terminal 36 of 23 is at 0 V, that is, L level, the transistor 37 is turned off, and does not affect the operation of the switching power supply circuit 7 at all.

On the other hand, when the timer switch 26 is pressed to perform a timing operation, that is, a timer operation, or when the off switch 27 is pressed to be in an off state, a switch signal from the timer switch 26 or the off switch 27 is received.
The OUT terminal 36 of the microcomputer 23 becomes + 5V, that is, H level. At this time, the transistor 37 is turned on and the base potential of the transistor 16 is reduced, so that the switching transistor 8 does not turn on and off, and the operation of the switching power supply circuit 7 stops.

When the operation of the switching power supply circuit 7 is stopped, the output from the constant voltage IC 20 is also stopped.
Since the voltage of the solar cell 34 connected in parallel with 21 is higher than the output of the primary cell 21, the operating voltage Vcc is supplied from the solar cell 34 to the microcomputer 23 with priority. Therefore, while power is being supplied from the solar cell 34, the primary battery 21 is not consumed, and the consumption of the primary battery 21 is prevented. Then, the microcomputer 23 shifts from the normal mode to the low power consumption mode operated by the crystal oscillator having the low oscillation frequency,
Continues the clock operation of the built-in clock circuit. During the timer operation, the microcomputer 23 enters the low power consumption mode as described above, and receives the switch signal from the timer switch 26, the LCD 30 displays the clock, and the clock operation is continued.

Next, when the surroundings are darkened by turning off the fluorescent lamp or the like, the solar cell 34 is turned off, so that the diode 22 conducts, and power is supplied from the primary battery 21 to the microcomputer 23.

When the supply of the power supply voltage is interrupted, for example, when a power failure occurs, no DC input voltage is generated across the capacitor 6 and the operation of the switching power supply circuit 7 is stopped. This is detected from the electric potential of the microcomputer 23, and the low power consumption mode is set. At the same time, power is supplied to the microcomputer 23 from the solar cell 34 or the primary battery 21 described above. Also in this case, when the surroundings are bright, power is supplied from the solar cell 34, and thus the consumption of the primary battery 21 is prevented.

As described above, in the present embodiment, the microcomputer 23 as the control means capable of converting to the low power consumption mode, the switching power supply circuit 7 as the power supply for supplying the operating voltage Vcc to the microcomputer 23 when the power supply voltage is supplied, Aside from the switching power supply circuit 7, a primary battery 21 for supplying an operating voltage Vcc to the microcomputer 23, an off switch 27 for stopping each operation of the insulated pot and turning off the insulated pot, and a timer operation for the insulated pot, ie, a timer operation A backup circuit as a backup means for backing up a switching power supply circuit 7 in which a solar battery 34 having an output voltage larger than that of the primary battery 21 is connected in parallel with the primary battery 21 in a warming pot control device provided with a timer switch 26 as a time keeping means. 38, the operation of the switching power supply circuit 7 is stopped when the supply of the power supply voltage is cut off, or when the timer is operating or in the off state, Switch to one of the following cell 21 and solar cell 34, and a means serving switching circuit 39 switched to supply the operating voltage Vcc to the microcomputer 23.

In this case, the operation of the switching power supply circuit 7 is stopped not only when the supply of the power supply voltage is cut off, but also when the timer is operating or in the off state, while the primary battery 21 and the solar battery
Since the operating voltage Vcc is supplied to the microcomputer 23 from any one of the microcomputers 35, the power consumption during the timer operation or the off state can be reduced as compared with the conventional one. In addition, since the solar cell 35 is connected in parallel with the primary battery 21, the operating voltage Vcc is supplied from the solar cell 35 to the microcomputer 23 if at least light such that the fluorescent lamp is lit hits the solar cell 35. And the consumption of the primary battery 21 can be prevented. Instead of using the primary battery 21 as a component of the backup circuit 38, a secondary battery or a charging device (for example, a charging capacitor) may be used.

FIG. 2 is a circuit diagram showing a second embodiment of the insulated pot control device according to the second aspect of the present invention. A difference from the first embodiment shown in FIG. 1 is that a daylight sensor 40 as monitoring means such as Cds for detecting the surrounding light and darkness and monitoring the operating state of the solar cell 34 is connected to the input port of the microcomputer 23. Is Rukoto. One end of the daylight sensor 40, which is connected to the input port of the microcomputer 23, is connected to the resistor 41.
41 is grounded. And microcomputer of daylight sensor 40
The other end not connected to the 23 input ports has the operating voltage V
It is connected to the output side of the constant voltage IC 20 to obtain cc. The operation output voltage Vcc of the daylight sensor 40 is supplied from the switching power supply 7 in the normal mode and from the primary battery 21 or the solar cell 34 in the low power consumption mode. The other configuration is exactly the same as that of the first embodiment.

Next, the operation of the above configuration will be described. The microcomputer 23 detects the surrounding brightness through the daylight sensor 40. When the surroundings are bright, the microcomputer 23
The T terminal 36 becomes + 5V, that is, H level. At this time,
Since the transistor 37 is turned on and the base potential of the transistor 16 decreases, the switching transistor 8 does not turn on and off, and the operation of the switching power supply circuit 7 stops.

When the operation of the switching power supply circuit 7 is stopped, the output from the constant voltage IC 20 is also stopped.
Since the voltage of the solar cell 34 connected in parallel with 21 is higher than the output of the primary cell 21, the operating voltage Vcc is supplied from the solar cell 34 to the microcomputer 23 with priority. Therefore, while power is being supplied from the solar cell 34, the primary battery 21 is not consumed, and the consumption of the primary battery 21 is prevented. Then, the microcomputer 23 shifts from the normal mode to the low power consumption mode operated by the crystal oscillator having the low oscillation frequency,
Continues the clock operation of the built-in clock circuit. During the timer operation, the microcomputer 23 enters the low power consumption mode as described above, and receives the switch signal from the timer switch 26, the LCD 30 displays the clock, and the clock operation is continued.

Next, when the surroundings are darkened by turning off the fluorescent lamp, the solar cell 34 is turned off. The microcomputer 23 detects that the surroundings have become dark through the daylight sensor 40, and also detects the operating voltage Vcc of the microcomputer 23. When the solar cell 34 is turned off and the operating voltage Vcc decreases, the OUT terminal The voltage from 36 switches from H level of + 5V to L level. In this case, if the supply of the power supply voltage is not interrupted, the switching power supply 7 resumes the operation with priority and outputs the DC output voltage Vp, thereby preventing the primary battery 21 from being consumed.

When a power failure occurs, the microcomputer 23 sets the resistance 2
A power outage is detected from the potential between 8 and 29, the low power consumption mode is set, and the operating voltage Vcc is supplied to the microcomputer 23 from the solar cell 34 or the primary battery 21 described above. Also in this case, when the surroundings are bright, power is supplied from the solar cell 34, and thus the consumption of the primary battery 21 is prevented. When the surroundings become dark and the supply of power from the solar cell 34 is interrupted, power is supplied from the primary battery 21.

Here, the state of the heating pot and the state of power supply are clarified and shown in Table 1.

[0035]

[Table 1]

As shown in Table 1 above, the primary battery 21 is used only when the surroundings become dark at the time of a power failure.
Consumption is further reduced.

As described above, in the above embodiment, the microcomputer 23 as the control means capable of converting to the low power consumption mode, the switching power supply circuit 7 as the power supply for supplying the operating voltage Vcc to the microcomputer 23 when the power supply voltage is supplied, Aside from the switching power supply circuit 7, a primary battery 21 for supplying an operating voltage Vcc to the microcomputer 23, an off switch 27 for stopping each operation of the insulated pot and turning off the insulated pot, and a timer operation for the insulated pot, ie, a timer operation A backup circuit as a backup means for backing up a switching power supply circuit 7 in which a solar battery 34 having an output voltage larger than that of the primary battery 21 is connected in parallel with the primary battery 21 in a warming pot control device provided with a timer switch 26 as a time keeping means. 38, a daylight sensor 40 as a monitoring means for detecting the surrounding light and darkness, and when the supply of the power supply voltage is cut off or the timer is operating. During the switching state, stops the operation of the switching power supply circuit 7, the primary battery 21 and the solar cell 34
To supply the operating voltage Vcc to the microcomputer 23, and when the daylight sensor 40 detects that the surroundings have become dark, a switching circuit 39 as switching means for restarting the operation of the switching power supply circuit 7 is provided. Have.

In this case as well, the operation of the switching power supply circuit 7 is stopped not only when the supply of the power supply voltage is cut off, but also during the operation of the timer or in the off state, and either one of the primary battery 21 or the solar battery 35 is stopped. Thus, since the operating voltage Vcc is supplied to the microcomputer 23, it is possible to reduce the power consumption during the operation of the timer or during the off state as compared with the conventional one. In addition, since the solar cell 35 is connected in parallel with the primary battery 21, the operating voltage Vcc is supplied from the solar cell 35 to the microcomputer 23 if at least light such that the fluorescent lamp is lit hits the solar cell 35. And the consumption of the primary battery 21 can be prevented.

Further, when the operating voltage Vcc is supplied from the solar cell 35 to the microcomputer 23, if the light from the solar cell 35 stops being irradiated, the operating voltage Vcc is replaced by the primary battery 21 originally connected in parallel. When the daylight sensor 40 detects that the surrounding area has become dark, the switching circuit 39 restarts the operation of the switching power supply circuit 7. Therefore, as long as the supply of the power supply voltage is not interrupted, the microcomputer through the switching power supply circuit 7
The operating voltage Vcc is supplied to the power supply 23, so that the consumption of the primary battery 21 can be effectively prevented. Instead of using the primary battery 21 as a component of the backup circuit 38, a secondary battery or a charging device (for example, a charging capacitor) may be used.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the present invention. For example, although the switching power supply circuit 7 has been described in this embodiment, various power supply circuits other than the switching method may be used.

[0041]

According to the first aspect of the present invention, there is provided an insulated pot control apparatus, comprising: a control means capable of converting to a low power consumption mode; a power supply for supplying an operating voltage to the control means when a power supply voltage is supplied; Separately from the above, the control unit includes a battery or a charging device for supplying an operating voltage to the control means, a switch for stopping each operation of the heat storage tank to turn off the operation, and a timer for clocking the heat storage tank. A backup means for connecting a solar cell having an output voltage higher than that of the battery or the charging device in parallel with the battery or the charging device to back up the power supply; A switching means for stopping the operation of the power supply and switching between the battery or the charging device and the solar cell to supply an operating voltage to the control means during the middle or the off state. It is possible to reliably reduce power consumption during timekeeping operation or in the off state, and to prevent battery consumption as much as possible when power supply is cut off. Become.

According to a second aspect of the present invention, there is provided an insulated pot control device, comprising: a control means capable of converting to a low power consumption mode; a power supply for supplying an operating voltage to the control means when a power supply voltage is supplied; Separately, a battery or charging device for supplying an operating voltage to the control means, a switch for stopping each operation of the heating pot to turn off the heating pot, and a timer control apparatus for clocking the heating pot, A backup unit for connecting the battery or the solar battery having a larger output voltage than the charging device in parallel with the battery or the charging device to back up the power supply; a monitoring unit for detecting surrounding light and dark; When the supply is cut off or during the timing operation or the off state, the operation of the power supply is stopped, and the battery or the charging device and the solar cell are switched to any one of the power sources. A switching means for supplying an operating voltage to the stage and for resuming the operation of the power supply when the surroundings are detected to be dark by the monitoring means. The power can be reliably reduced, and the consumption of the battery can be prevented as much as possible when the supply of the power supply voltage is cut off. In addition, it is possible to effectively prevent battery consumption.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a warming pot control device showing a first embodiment of the present invention.

FIG. 2 is a circuit diagram of an insulated pot control device showing a second embodiment of the present invention.

FIG. 3 is a circuit diagram of a heat retaining pot control device showing a conventional example.

[Explanation of symbols]

 7 Switching power supply 21 Primary battery (battery) 23 Microcomputer (control means) 26 Timer switch (time measuring means) 27 Off switch 34 Solar cell 38 Backup circuit 39 Switching circuit 40 Daylight sensor (monitoring means)

Claims (2)

[Claims] A control unit capable of converting to a low power consumption mode; a power supply for supplying an operating voltage to the control unit when a power supply voltage is supplied; a battery for supplying an operating voltage to the control unit separately from the power supply; A charging device, an insulated switch control device that includes an off switch for stopping each operation of the insulated kettle to turn off the insulated kettle, and a timer for operating the insulated kettle in time, wherein the output voltage of the battery or the charging device is lower than that of the charging device. A large solar cell, a backup means for connecting the battery or the charging device in parallel and backing up the power supply, when the supply of the power supply voltage is cut off, or during the clocking operation or the off state,
And a switching unit for stopping operation of the power supply and switching between the battery or the charging device and the solar cell to supply an operating voltage to the control unit. 2. A control means capable of converting to a low power consumption mode, a power supply for supplying an operation voltage to the control means when a power supply voltage is supplied, a battery for supplying an operation voltage to the control means separately from the power supply, or A charging device, an insulated switch control device that includes an off switch for stopping each operation of the insulated kettle to turn off the insulated kettle, and a timer for operating the insulated kettle in time, wherein the output voltage of the battery or the charging device is lower than that of the charging device. Backup means for connecting a large solar cell in parallel with the battery or the charging device to back up the power supply, monitoring means for detecting surrounding light and shade, when the supply of the power supply voltage is cut off, during the timekeeping operation, or during the cutoff. In the state, the operation of the power supply is stopped, and the operation is switched to either the battery or the charging device and the solar cell, and an operating voltage is supplied to the control unit, and the monitoring is performed. Switching means for resuming the operation of the power supply when the surroundings are darkened by the means.