JP2017028951A - Apparatus using battery as power supply, and battery type gas stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow for prediction and notification that the battery life runs out during next time cooking control, when power supply is interrupted and cooking control of gas stove is not carried out or when cooking control is started.SOLUTION: Battery voltage A at the time of all phase excitation is stored in the operation control of a stepping motor 30 based on the operation of an operating section 14. After ending the operation control of the stepping motor 30, and before operation control of the stepping motor 30 is started based on the next time operation of the operating section 14, a prediction is made "whether or not the battery life runs out during the next time operation control of the stepping motor 30," based on the battery voltage A thus stored.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a device using a battery as a power source, for example, a battery-type gas stove.

  In paragraph No. 0012 of Patent Document 1 below, when it is detected that the battery voltage has dropped below the second set value during the combustion operation in a gas stove using a dry battery as a power source, the dry battery has reached the replacement time. In view of this, a technique is disclosed in which a battery replacement error is displayed blinking to stop driving the load. Further, it is mentioned that the second set value is preferably an end voltage, which is a lower limit operating voltage that can drive a load with a maximum voltage drop in a repeatable manner (paragraph number 0016).

Japanese Patent No. 4168041

  However, since the gas stove is used for cooking, in the above conventional technique, it is determined whether or not it is time to replace the dry battery during the combustion operation, so the battery voltage drops below the second set value during cooking. If this happens, the gas stove will stop burning even though it is in the middle of cooking, and the taste of the cooking may be significantly impaired, or in the worst case, the ingredients used for cooking may be wasted. is there.

  In order to remedy such problems, the applicant of the present invention, in a gas stove equipped with a stepping motor for adjusting the flow rate of the combustion gas, immediately after turning on the power and before starting the combustion operation of the gas stove, the stepping motor which is the maximum load is excited in all phases. The battery life is determined based on whether or not the battery voltage detection value at that time is less than a predetermined voltage, and when it is determined that the battery life is reached, the battery replacement request is notified and the combustion operation is not started. We are developing battery-operated gas stoves to control.

  However, if all phase excitation of the stepping motor is performed every time the power is turned on, there is a problem that the power consumption for the battery life confirmation operation that is not the original operation increases. On the other hand, since the battery has the characteristic that the open circuit voltage is the largest and the output voltage decreases as the output current increases, determining the battery life based on the open circuit voltage in the state where the maximum load is not operated, When the maximum load is operated during the combustion operation, a sufficient battery output voltage cannot be obtained, which hinders the operation of the electric load.

  Then, an object of this invention is to provide the apparatus which uses the battery as a power supply which can alert | report a battery life exactly before starting apparatus operation | movement, suppressing power consumption.

  In order to achieve the above object, the present invention takes the following technical means.

  That is, the present invention is based on a predetermined electric load that operates using a battery as a power source, an operation unit that receives a user operation to execute a predetermined function that accompanies the operation of the electric load, and an operation of the operation unit A device using a battery as a power source, the apparatus including a control unit that controls the operation of the electric load and operates using the battery as a power source. The control unit is a predetermined unit in the operation control of the electric load based on an operation of the operation unit. An output voltage storage unit that stores output voltage data of the battery during operation, and the electric unit that is based on the next operation of the operation unit after completion of operation control of the electric load that stores the output voltage data. Based on the output voltage data stored in the output voltage storage unit before the operation control of the load is started <whether battery life comes during the next operation control of the electric load> And it is characterized in that it comprises a battery life predicting unit for predicting whether> (claim 1).

  According to such a device using the battery of the present invention as a power source, battery output voltage data at the time of a predetermined operation of an electric load that requires a relatively large current during operation, such as all-phase excitation of a stepping motor and adsorption operation of a solenoid valve, is stored. In addition, since the battery life prediction is performed based on the output voltage data at the time of high load stored after the end of the operation control of the electric load, it is determined that the battery life is during the operation control of the electric load, and the operation control is positively performed. Will never be interrupted. In addition, since the output voltage data at the time of high load during the previous operation control is used for battery life prediction, it is not necessary to operate the electrical load only for such battery life prediction, reducing the power consumption of the battery life prediction operation, The battery life can be extended.

  In the apparatus using the battery of the present invention as a power source, the control unit performs a holding operation of power supply to itself and also shuts off the power supply to itself by stopping the holding operation. The battery life prediction unit, after the operation control of the electrical load that has stored the output voltage data, before the power supply to the control unit is shut off by the self-power holding unit, It may be configured to perform battery life prediction (claim 2). According to this, since the battery life prediction is performed before the power supply is cut off, for example, when applied to a battery-type gas stove, the battery life prediction is performed immediately after cooking is completed, and notification based on the prediction result is performed. Thus, the user can be prompted in advance to obtain a replacement battery until the next use.

  The battery life prediction unit temporarily cuts off the power supply to the control unit after the operation control of the electric load that has stored the output voltage data is completed, and then resumes the power supply to the control unit. The battery life may be predicted when the control unit is restarted (Claim 3). According to this, since the battery life is predicted based on the output voltage data at the time of the previous operation control immediately before the start of the operation control of the electric load, various factors generated during the power shutdown, for example, battery replacement, etc. Various exceptions such as whether or not to perform battery life prediction can be provided accordingly.

  For example, the control unit determines whether or not the battery has been replaced between the interruption of power supply to the control unit and the restart of the control unit when the control unit is restarted. A battery replacement determination unit may be further included, and the battery life prediction unit may be configured not to perform the battery life prediction based on the output voltage data when determining that the battery has been replaced. According to this, when it is determined that the battery has been replaced by the battery replacement determination unit, the battery life prediction unit operates the electric load, for example, when the control unit is restarted without performing the battery life prediction based on the output voltage data. The drop voltage from the open voltage of the battery is measured and the battery life is determined based on the magnitude of the drop voltage, or the battery life when the open voltage of the battery is sufficiently large, such as a nominal voltage. Normal operation control can be started without performing any processing relating to the determination.

  Further, the predetermined operation may be an operation that requires a current of a predetermined value or more during operation control of the electric load. According to this, the accuracy of battery life prediction can be further improved by dropping the battery voltage by a high load operation. Examples of such operations include an adsorption operation of the original solenoid valve in the gas stove, an all-phase excitation operation of the stepping motor for adjusting the opening of the gas flow control valve, and other appropriate operations. It may be.

  The battery life prediction unit predicts that the battery life will come during the next operation control of the electric load when the output voltage data stored in the output voltage storage unit is less than a predetermined voltage. (Claim 6). According to this, it is possible to accurately predict the battery life by setting, as the predetermined voltage, the maximum current consumption during the operation control of the electric load or the battery voltage at the current consumption close thereto.

  In addition, the battery life prediction unit is preferably configured to notify that the battery life is reached when it is predicted that <the battery life comes during the next operation control of the electric load>. ). According to this, it is possible to prompt the user to replace the battery by notifying the user that the battery life is reached. It should be noted that when it is notified that the battery life is reached, it is preferable to configure the control so that the next electric load operation control is not started. It is possible to prevent the vehicle from stopping in a halfway operation state.

  The apparatus using the battery of the present invention as a power source can be suitably implemented as a battery-type gas stove (Claim 8). According to this, the battery life prediction of the battery gas stove can be performed with as low power consumption as possible.

  As described above, according to the apparatus using the battery as the power source according to claim 1 of the present invention, an electrical load that requires a relatively large current during operation, such as all-phase excitation of a stepping motor and adsorption operation of a solenoid valve, can be used. Since the battery output voltage data during a predetermined operation is stored and the battery life prediction is performed based on the stored output voltage data at the time of high load after the operation control of the electric load is completed, the battery is controlled during the operation control of the electric load. It is determined that the service life has been reached, and the operation control is not actively interrupted. In addition, since the output voltage data at the time of high load during the previous operation control is used for battery life prediction, it is not necessary to operate the electrical load only for such battery life prediction, reducing the power consumption of the battery life prediction operation, The battery life can be extended.

  Moreover, according to the apparatus using the battery as the power source according to claim 2 of the present invention, since the battery life prediction is performed before the power supply is cut off, for example, when applied to a battery type gas stove, the battery life prediction is performed immediately after the end of cooking. To perform notification based on the prediction result, thereby prompting the user in advance to obtain a replacement battery before the next use.

  Further, according to the apparatus using the battery as the power source according to claim 3 of the present invention, the battery life prediction is performed based on the output voltage data at the previous operation control immediately before the start of the operation control of the electric load. Various exceptions can be made, such as whether or not to predict battery life depending on various factors that occur during shut-off, such as battery replacement.

  Moreover, according to the apparatus using the battery as the power source according to claim 4 of the present invention, when the battery replacement determination unit determines that the battery has been replaced, the battery life prediction unit performs the battery life prediction based on the output voltage data. For example, when the control unit is restarted, the electric load is operated to measure the drop voltage from the open voltage of the battery, and the battery life is determined based on the magnitude of the drop voltage, or the battery is opened. When the voltage is sufficiently large, such as a nominal voltage, normal operation control can be started without performing any processing relating to battery life determination.

  Moreover, according to the apparatus which uses the battery as a power supply according to claim 5 of the present invention, the accuracy of battery life prediction can be further improved by dropping the battery voltage by a high load operation.

  According to the apparatus using the battery as a power source according to claim 6 of the present invention, the maximum current consumption during the operation control of the electric load or the battery voltage at the current consumption close thereto is set as the predetermined voltage. This makes it possible to accurately predict the battery life.

  Moreover, according to the apparatus using the battery as a power source according to claim 7 of the present invention, the user can be prompted to replace the battery by notifying the user that the battery life is reached.

  According to the battery-type gas stove according to claim 8 of the present invention, the battery life of the battery-type gas stove can be determined with as low power consumption as possible.

It is a schematic circuit diagram of the battery-type gas stove which concerns on one Embodiment of this invention. It is a control flowchart from power activation of the battery type gas stove to power shutdown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a circuit diagram of a battery-type gas stove (device using a battery as a power source) according to an embodiment of the present invention, and is a schematic circuit diagram of a main circuit portion related to the present invention. The basic configuration of the gas stove may be a conventionally known appropriate one, and for example, may be the same configuration as the gas stove disclosed in Japanese Patent Application Laid-Open No. 2012-7808.

  First, the basic configuration of a gas stove will be described with reference to the reference numerals shown in FIGS. 1 to 3 of the above publication. The gas stove (1) includes a box-shaped casing (10) that opens upward, and a casing An outer shell is constituted by a glass top plate (11) that closes the upper opening of (10) and becomes the top surface portion of the gas stove (1).

  The top plate (11) is provided with a plurality of heating sections (2) having a stove burner (25). As the heating section (2), a standard burner (2a), a small burner (2b), a high thermal power burner ( A total of three stove burners (25) of 2c) are provided.

  The gas stove (1) is provided with a grill cabinet provided with a grill burner, and the front opening of the grill cabinet is closed by a grill door (12) provided in front of the gas stove (1).

  Each heating section (2) is provided with a heated object detecting means (22). The to-be-heated object detection means (22) is in a state where the to-be-heated object is placed on the five virtues (21), i.e., the to-be-heated object is arranged on each stove burner (25). Whether or not.

  The front panel (13) constituting the front portion of the gas stove (1) is provided with an operation section (14) comprising a knob dial device for operating each heating section (2).

  Each operation unit (14) is manually operated to command switching and fire power adjustment of the corresponding combustor (25), and control of the thermal power. It functions as a thermal power setting means (target position setting means for the flow rate control member) for switching the fire extinguishing and adjusting the thermal power. The thermal power control may be adjusted in multiple stages such as fire extinguishing, small thermal power, medium thermal power, and large thermal power, and it should be adjustable in 10 to tens of stages from fire extinguishing to large thermal power. In addition, in order to prevent extinction, it is possible not to set the thermal power from the fire extinguishing to the small thermal power, and to adjust the thermal power from the small thermal power to the large thermal power in 10 to 10 stages. The operation unit (14) can be configured by a rotary encoder that outputs a number of pulses corresponding to the rotation operation amount to the control unit, can also be configured by a rotary potentiometer, or can be configured by a touch panel. It is also possible to configure the operation unit (14) so as to increase or decrease the heating power setting value stored in the control unit by a touch operation.

  A setting input panel (15) constituting setting means for instructing the setting of cooking of the corresponding burner (25) is provided below each operation unit (14) of the front panel (13). By operating the setting input panel (15), an automatic cooking mode such as a cooking timer mode, a water heating mode, and a rice cooking mode can be set for each cooker (25).

  Further, a setting input panel (16) for instructing switching between ignition and extinguishing of the grill burner and adjustment of the thermal power is provided on the left side of the front panel (13).

  When cooking without mode setting using the setting input panels (15) and (16), the power is turned on by operating the power switch (17) provided on the front, and then the operation unit (14) is pressed. Then, an ignition command is sent to the control unit. Upon receiving this command, the control unit opens the original gas solenoid valve (27) of the gas supply passage (26), and opens the flow rate control valve (3) corresponding to the arbitrary burner (25) or grill burner at a predetermined opening. At the same time, the spark plug (24) is sparked to ignite the burner (25) or the grill burner. Thereby, the to-be-heated material mounted on the five virtues (21) corresponding to the flame of the stove burner (25) can be heated, and the meat and fish in the grill can be baked by the flame of the grill burner.

  Further, the gas device is provided with a control unit mainly composed of a microcomputer. The controller receives an electromotive force of a thermocouple (23) as a combustion detection means provided in each burner (25), and the controller causes the input electromotive force to exceed a predetermined value (for example, 3.5 mV). When this happens, the combustion lamps (combustion lamps corresponding to the respective burners) provided in the display unit provided on the setting input panels (15) and (16) and / or the top plate (11) are turned on.

  A fuel passage for supplying fuel is connected to each of the stove burner (25) and the grill burner, and as this fuel passage, a branch passage that branches from a gas supply passage (26) for supplying a fuel gas such as city gas ( 26a) is connected.

  The flow control valve (3) having a closing function for controlling the amount of fuel passing through each branch passage (26a) and preventing the passage of fuel in each branch passage (26a), and the flow control valve (3). A stepping motor (30) for driving the valve is provided for each branch passage (26a), and fine adjustment of the opening position of the flow rate control member (34) functioning as a valve element is performed by the stepping motor (30). Moreover, the potentiometer (4) which detects the opening position of a flow control member (34) is provided. Furthermore, an original gas solenoid valve (27) is provided as an on-off valve having a closing function for preventing the passage of fuel in the fuel passage. Thus, as a valve device having a closing function for preventing the passage of fuel in the fuel passage, the flow control valve (3) and the original gas electromagnetic valve (27) are provided in series, and the original gas electromagnetic valve (27). Is provided upstream of the gas flow path from the flow control valve (3).

  The original gas solenoid valve (27) and the stepping motor (30) that drives the flow rate control valve (3) are controlled by the control unit, and the detected voltage in the potentiometer (4) is output to the control unit and processed. The Further, the flow rate control valve (3) is closed so that the flow rate becomes zero and a shut-off state is established when the corresponding combustor (25) is not used.

  As the stepping motor (30), a two-phase to five-phase motor can be suitably used. When the flow control valve (3) is closed, the stepping motor (30) is excited in all phases by the control unit. Therefore, it is possible to generate a larger torque and thereby perform the valve closing operation reliably.

  The gas stove configured as described above includes a stepping motor (30) of the flow rate control valve (3), an original gas solenoid valve (27), a spark plug (24), and a display unit as electric drive parts that serve as an electric load of the battery. ing. Among them, an electric load with a large current consumption and one of its operation modes is an all-phase excited stepping motor (30), and another one is an adsorption operation for opening a valve from a closed state. The original gas solenoid valve (27). The original gas solenoid valve (27) consumes a large current of about several hundred milliA as an adsorption current during the adsorption operation, but the holding current in the opened state is very small, several milli-A to several tens of milli-A. Operates with current.

  Next, the control configuration of the battery type gas stove according to the present embodiment will be described in detail.

  As shown in FIG. 1, the control unit is mainly configured by a microprocessor 100 provided on a control board, and the microprocessor 100 and the electric drive component are accommodated in a battery accommodating unit provided in a housing. The two dry batteries 101 are operated as a power source. The power supply line that supplies the output voltage (hereinafter referred to as “battery voltage”) of the battery 101 from the battery 101 to the microprocessor 100 and the electric drive component is turned on / off using a power switch composed of a simple on / off switch. In this embodiment, a self-power holding circuit 102 (self-power holding means) is provided in the middle of the power supply line, and the microprocessor 100 performs a holding operation of power supply to itself and holds the power. It is configured so that the power supply to itself can be controlled to be cut off by stopping the operation.

  The self-power holding circuit 102 includes a switching element Q1 made of a p-channel FET provided in the middle of the power supply line. The gate of the switching element Q1 is connected to the positive electrode of the battery 101 via a pull-up resistor R1, and is connected to the ground via switching elements Q2 and Q3 comprising two npn transistors provided in parallel. ing. The bases of the switching elements Q2 and Q3 are grounded through the pull-down resistors R2 and R3, respectively. The base of one switching element Q2 is connected to the self-holding output port of the microprocessor 100. While the self-holding signal voltage is output from the microprocessor 1 to the switching element Q2, the switching element Q2 is turned on. Thus, the gate of the switching element Q1 is grounded, whereby the switching element Q1 is turned on and the power supply voltage is supplied to the microprocessor 100. The base of the other switching element Q3 is connected to the positive electrode of the battery 101 via the power switch SW. When the power switch SW is operated and turned on, the switching element Q3 is turned on and the gate of the switching element Q1 is turned on. The switching element Q1 is also turned on by this being grounded, and the power supply voltage is supplied to the microprocessor 1. The microprocessor 1 is activated when a power supply voltage is supplied from the power switch SW, and outputs the self-holding signal immediately after the start-up (the output of the self-holding signal becomes a holding operation), thereby supplying power to itself. By maintaining the supply and satisfying a predetermined power-off condition, the power supply is automatically turned off by stopping the output of the self-holding signal.

  In FIG. 1, the battery voltage is directly supplied to the microprocessor 100 as a power supply voltage via the switching element Q1, but the voltage is stepped down by providing a current limiting resistor in series with the switching element Q1. Alternatively, a DC / DC converter may be provided between the battery 101 and the microprocessor 100, and the output voltage of the converter may be supplied to the microprocessor 100 as a power supply voltage. Further, the battery voltage is directly supplied to the microprocessor 100 as a power supply voltage, and a constant voltage output from the converter is used for the reference voltage of the input signal from the analog signal input port such as the battery voltage monitoring signal input port. Can be input to the reference voltage signal input port.

  A battery voltage monitoring circuit 103 is connected to the positive electrode of the battery 101, and a battery voltage monitoring signal output from the battery voltage monitoring circuit 103 is input to a battery voltage monitoring signal input port of the microprocessor 100. The microprocessor 100 is configured to be able to detect the battery voltage based on the battery voltage monitoring signal input to the battery voltage monitoring signal input port during start-up, and thus the battery voltage monitoring circuit 103 and the microprocessor 100 can detect the battery voltage. Battery voltage detection means is configured.

  A drive circuit 104 for driving the stepping motor 30 is provided on the control board, and the power supply voltage output from the self-power holding circuit 102 is also supplied to the drive circuit 104. The drive circuit 104 supplies a drive voltage to the stepping motor 30 based on a control signal output from the microprocessor 100. Although only one stepping motor 30 is shown in FIG. 1, a drive circuit can be provided for each stepping motor.

  The operation amount of the operation unit 14 for operating the stepping motor 30, that is, the operation unit 14 for receiving the user's operation in order to execute functions such as ignition / extinguishment and thermal power adjustment of the corresponding burner (25) The microprocessor 100 is configured to control the operation of the stepping motor 30 based on the operation of the operation unit 14 during normal control, which is detected by the operation board 105 communicatively connected to the processor 100.

  Further, the microprocessor 100 is provided with a non-volatile storage means 106 such as an EEPROM in the form of an internal memory or an external memory, so that the data stored in the non-volatile storage means can be stored even when the power is cut off. ing.

  FIG. 2 shows a control flow from when the power to the microprocessor 100 is turned on until it is shut off. In the figure, steps S1 to S9 indicate battery life prediction steps at startup, and these steps S1 to S9. The battery life prediction unit that performs battery life prediction at the time of startup is configured by the microprocessor 100 that executes step S11, and step S11 indicates a battery life prediction step before power-off, and the microprocessor 100 that executes step S11 performs A battery life prediction unit that performs battery life prediction before power-off is configured.

  Since the battery life prediction at the start-up depends on the previous power-off process, the normal control shown in step S10 and the power-off process shown in step S12 will be described first.

  When the normal control is started, the microprocessor 100 monitors the operation of the operation unit, and when any one of the operation units is operated, the microprocessor 100 performs the cooking function corresponding to the operation. Start motion control. In particular, in the present embodiment, when the operation of the operation unit 14 for executing functions such as ignition / extinguishing of each combustor (25) and heating power adjustment is received, first, the original gas solenoid valve (27) is opened, and the stepping motor It is ignited by driving 30 to open the flow control valve (3) to the indicated opening and sparking the spark plug (24). While the original gas solenoid valve (27) and the flow rate control valve (3) are open, it is necessary to perform gas leak detection control and the like, so that the operation control of the original gas solenoid valve (27) and the stepping motor 30 is continued. When the original gas solenoid valve (27) and the flow rate control valve (3) are both closed by the fire extinguishing operation by the user or the fire extinguishing operation control in the automatic cooking mode, the original gas solenoid valve (27) and the stepping motor 30 are closed. This completes the operation control. At the time of such a fire extinguishing operation control, the pushing operation of the flow rate control valve (3) by the all-phase excitation of the stepping motor 30 is performed. In this embodiment, the battery 101 of the stepping motor 30 at the all-phase excitation in the extinguishing operation control is controlled. The output voltage A is detected, and the output voltage data is stored and held in the EEPROM 106.

  If the predetermined power-off condition is satisfied during execution of normal control, such as when the cooking operation is not being performed and no operation unit has been operated for a predetermined time or more, the microprocessor 100 ends the normal control and the power-off process (step S12) is executed. However, in the present embodiment, it is determined whether or not the output voltage A stored in step S11 is smaller than a predetermined battery life determination threshold value α (for example, 2.0 V) before executing the power shutoff process. If the output voltage A is greater than or equal to the threshold value α, the process proceeds to the power shutoff process. If the stored output voltage A is less than the threshold value α, the operation of the stepping motor 30 is being controlled based on the next operation of the operation unit 14. Therefore, the battery life is predicted to be reached, and the process proceeds to the battery life notification process shown in step 13. The battery life notification process can be set as appropriate notification process contents, but can be notified that the battery life is reached, for example, by a buzzer sound or a display on a display unit. Further, when the process shifts to the battery life notification process, it is terminated abnormally so that normal control is not executed until the battery is replaced.

  In the power-off process, the open-circuit voltage γ of the battery 101 is measured, the open-circuit voltage data is also stored and held in the EEPROM 106, and the output of the self-holding signal to the self-power holding circuit 102 is stopped to cut off the power supply. To do.

  Thereafter, when the microprocessor 100 is activated by turning on the power again, the battery life determination process shown in steps S1 to S9 is first executed before starting the normal control. In step S1, the open-circuit voltage β of the battery is measured, and if the open-circuit voltage β is 3.0 V or more (step S2), it is determined that the battery 101 is in a new state and the output voltage data stored in the EEPROM 106 is stored. A is discarded (step S3), and the process proceeds to the normal control in step S10.

  On the other hand, when the open circuit voltage β is less than 3.0 V and larger than the battery open circuit voltage γ + the potential increase amount C due to natural charging at the previous power-off process (step S4), the battery 101 is replaced with a used product other than a new one. The output voltage data A stored in the EEPROM 106 is discarded (step S5), and the stepping motor 30 is excited in all phases, and the output voltage B of the battery during the all-phase excitation is measured (step S5). S6). If the output voltage B is smaller than the battery life determination threshold value α (step S7), it is determined that the battery life is reached, and the process proceeds to the battery life notification process of step S13. It is determined that the life is not reached, and the routine proceeds to normal control in step S10.

  The microprocessor 100 that executes the above-described steps S1 to S4 determines whether or not the battery 101 has been replaced between the interruption of the power supply to the microprocessor 100 and the restart of the microprocessor 100. A battery replacement determination unit is configured to be determined when 100 is restarted.

  If the open circuit voltage β is equal to or lower than γ + C (step S4), it is determined that the battery 101 has not been replaced, and the battery output voltage data A during all-phase excitation of the stepping motor 30 during the previous fire extinguishing is obtained as the EEPROM 106. (Step S8), if the output voltage data A is less than the battery life determination threshold value α, it is predicted that the battery life will be reached during the operation control of the next stepping motor 30, and the battery life notification processing in step S13 Migrate to On the other hand, if the output voltage data A is equal to or greater than the threshold value α, it is predicted that the battery life will not come, and the routine proceeds to normal control in step S10. Operation control of the stepping motor 30 based on the next operation of the operation unit 14 after the end of the operation control of the stepping motor 30 that has stored the output voltage data A by the microprocessor 100 that executes Steps S8 and S9. A battery life prediction unit for predicting <whether battery life comes during the next operation control of the stepping motor 30> or <whether> is configured based on the output voltage data A stored in the EEPROM 106 before starting ing.

  Note that the potential increase amount C has a feature that the potential is restored when the battery is not used, and the potential recovers, and since this recovery amount is determined to some extent with respect to the value of the potential, the potential increase C This is a correction amount for more accurately determining whether or not the battery has been replaced by considering the increase amount C.

  According to the battery-type gas stove of the present embodiment, it is determined whether or not the battery 101 has been replaced in the startup process when the power is turned on, and immediately when the open voltage β of the battery 101 is equal to or higher than the nominal voltage 3.0V. By shifting to normal control, battery consumption during the startup process can be reduced. If it is determined that the battery has been replaced, the battery life prediction based on the output voltage data A is not performed. Instead, the stepping motor 30 is excited in all phases only at the time of the current startup. Since the battery life determination is performed based on whether or not the battery voltage B falls below the threshold value α, it is possible to accurately determine the battery life even when the battery is replaced with a used battery.

  Further, when it is determined that the battery has not been replaced, the battery life prediction is performed based on the output voltage A of the battery at the time of all-phase excitation of the stepping motor 30 during the last fire extinguishing operation before the previous power shutdown. Thus, it is possible to accurately predict the battery life without consuming a large current during the startup process.

  The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate.

  For example, in the above embodiment, the battery life is predicted and determined based on the battery voltage at the time of all-phase excitation of the stepping motor 30, but the battery life is predicted and determined based on the battery voltage during the adsorption operation of the original gas solenoid valve. It is also possible to make a determination.

14 Operation unit 30 Stepping motor (electric load)
100 Control unit (microprocessor)
DESCRIPTION OF SYMBOLS 101 Battery 102 Self-power holding means 106 Output voltage memory | storage part (EEPROM)

Claims (8)

A predetermined electric load that operates using a battery as a power source, an operation unit that receives a user's operation to execute a predetermined function associated with the operation of the electric load, and the operation of the electric load based on the operation of the operation unit. In a device using a battery as a power source, comprising a control unit that controls and operates with the battery as a power source,
The control unit includes an output voltage storage unit that stores output voltage data of the battery during a predetermined operation in operation control of the electric load based on an operation of the operation unit, and the electric load that stores the output voltage data After the end of the operation control, and before the start of the operation control of the electric load based on the next operation of the operation unit, based on the output voltage data stored in the output voltage storage unit <the next electric A battery-powered device comprising: a battery life prediction unit that predicts whether or not the battery life comes during control of load operation.   2. The apparatus using the battery as a power source according to claim 1, wherein the control unit includes a self-power holding unit that performs a holding operation of power supply to itself and interrupts the power supply to itself by stopping the holding operation. The battery life prediction unit is configured to predict the battery life after the operation control of the electric load that has stored the output voltage data is completed and before the power supply to the control unit is cut off by the self power supply holding unit. A device that uses a battery as a power source.   2. The device using the battery as a power source according to claim 1, wherein the battery life predicting unit temporarily cuts off the power supply to the control unit after the operation control of the electric load in which the output voltage data is stored. The battery-powered device is configured to predict the battery life when the power supply to the control unit is restarted and the control unit is restarted.   4. The apparatus using a battery as a power source according to claim 3, wherein the control unit is <whether the battery has been replaced between the interruption of power supply to the control unit and the restart of the control unit>. Is further provided with a battery replacement determination unit that determines when the control unit is restarted, and the battery life prediction unit does not perform the battery life prediction based on the output voltage data when determining that the battery has been replaced. Equipment that uses batteries to power.   The apparatus using the battery as a power source according to any one of claims 1 to 4, wherein the predetermined operation is an operation that requires a current of a predetermined value or more during operation control of the electric load. Equipment that uses batteries to power.   The apparatus using the battery as a power source according to any one of claims 1 to 5, wherein the battery life prediction unit <next time when output voltage data stored in the output voltage storage unit is less than a predetermined voltage. A battery-powered device that predicts that the battery life will be reached during operation control of the electric load.   In the apparatus using the battery according to any one of claims 1 to 6, the battery life prediction unit predicts that the battery life will come during the next operation control of the electric load. A device using a battery as a power source, characterized in that it is configured to notify that it is at the end of its life.   A battery-type gas stove comprising a device using the battery according to any one of claims 1 to 7 as a power source.

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