JP7369082B2 - gas cooker - Google Patents

Description

The present invention relates to a gas cooker, and more particularly to a gas cooker that uses a battery as a power source.

Conventionally, gas appliances have been known that are equipped with a battery and a load that operates with power supplied from the battery, measure the voltage of the battery, and notify that it is time to replace the battery when the battery voltage is below a predetermined voltage. (For example, see Patent Document 1).

JP2019-148425A

In Patent Document 1, a battery resistance value including internal resistance and contact resistance of the battery is calculated from the measured battery voltage, and based on this battery resistance value, it is determined and notified when it is time to replace the battery.

In Patent Document 1, the battery replacement time is determined based on the battery resistance value including both resistances, without distinguishing between the battery's internal resistance and the contact resistance. Regardless, for example, if the contact resistance increases due to poor contact between the battery and the terminals of the battery case in which the battery is housed, the battery voltage will drop significantly when driving a load, indicating that it is time to replace the battery. Misjudgment may occur. In other words, even though the battery has not yet reached the end of its life, it may be mistakenly determined that the battery has reached the end of its life due to a drop in battery voltage caused by an increase in contact resistance due to poor contact between the battery and the terminals of the battery case. be.

If a drop in battery voltage caused by poor contact between the battery and the terminals of the battery case is mistakenly determined to be a drop in battery voltage due to battery life, and the user is notified that it is time to replace the battery, the user may Even if the battery is a recently used battery, the user may discard the battery and replace it with a new battery, thereby wasting the battery.

The present invention has been made in view of the above points, and an object of the present invention is to enable notification of a decrease in battery voltage due to poor contact between the battery and the terminal.

In order to achieve the above object, the present invention is configured as follows.

(1) The gas cooker according to the present invention includes a burner, an operation section that is operated to turn on and extinguish the burner, a load that operates using a battery as a power source, and a control section that controls the operation of the burner based on the operation of the operation section. a control unit that controls combustion of the battery and controls the operation of the load by controlling energization to the load; a battery voltage detection unit that detects the voltage of the battery; comprising a notification unit that reports a voltage drop, and a connection terminal that comes into contact with each electrode of the battery,
Electric power from the battery is supplied to the load and the control unit via the connection terminal, and the control unit detects the voltage detected by the battery voltage detection unit while the load is not energized. When the battery voltage detected by the voltage detecting section when the load is energized is higher than the first threshold, the notifying section This notifies you of a drop in battery voltage due to poor contact between the battery and the connection terminal.

According to the gas cooker according to the present invention, the battery voltage when the load is not energized is assumed to be the battery voltage of a new battery or a recently used battery (hereinafter referred to as a new battery). If the battery voltage is higher than the first threshold, that is, if the battery is new (or has just been used) and there is no poor contact between the battery and the connection terminal, the battery voltage when the load is energized is When the voltage falls below the second threshold value, which is assumed not to fall below that, it is assumed that the battery voltage has significantly decreased due to an increase in contact resistance due to poor contact between the battery and the connection terminal, and a contact failure is reported.

Since poor contact between the battery and the connection terminals can be reported in this way, the user can take measures to deal with the poor contact, such as cleaning each electrode of the battery, the connection terminals of the battery case, etc. Poor contact can be resolved by removing dirt and properly resetting the battery.

In addition, a decrease in battery voltage due to poor contact between the battery and the connection terminal is not erroneously determined to be the end of the battery life, thereby preventing erroneous notification. This prevents the user from wasting the battery by discarding the battery and replacing it with another new battery even though the battery is new.

(2) In a preferred embodiment of the present invention, the control unit controls the load when the battery voltage detected by the battery voltage detection unit is equal to or lower than a first threshold while the load is not energized. When the battery voltage detected by the voltage detection unit when energized becomes equal to or less than a second threshold value that is lower than the first threshold value, the notification unit notifies a decrease in battery voltage due to a decrease in the remaining capacity of the battery. do.

According to this embodiment, if the battery voltage when the load is not energized is equal to or lower than the first threshold value assumed as the battery voltage of a new battery, the battery is not a new battery but a exhausted battery. When the battery voltage of this exhausted battery when the load is energized becomes equal to or less than the second threshold value, a notification is given that the battery voltage has decreased due to a decrease in the remaining capacity of the battery.

This notification due to the low battery level can be used to notify that the battery life has come to an end, and the user can replace the battery with a new battery based on the notification that the battery life has come to an end.

(3) In another embodiment of the present invention, the control unit causes the notification unit to detect a decrease in battery voltage due to a poor contact between the battery and the connection terminal, and a decrease in battery voltage due to a decrease in the remaining capacity of the battery. be notified differently.

According to this embodiment, since a decrease in battery voltage due to a poor contact and a decrease in battery voltage due to a decrease in remaining battery capacity are notified differently, the user is asked whether the notification is due to a poor contact or whether the battery voltage is low. It is possible to know whether the notification is due to a low remaining amount, and appropriate measures can be taken depending on the content of the notification, improving convenience.

(4) In another embodiment of the present invention, the control unit controls the load when the battery voltage detected by the battery voltage detection unit is higher than a first threshold value while the load is not energized. When the battery voltage detected by the voltage detection section when energized becomes equal to or less than a second threshold value lower than the first threshold value, combustion in the burner and energization to the load are prohibited.

According to this embodiment, by setting the second threshold value a little higher than the operating limit of the microcomputer constituting the control unit, when the battery voltage in a state where the load is not energized is higher than the first threshold value, i.e. In the case of a new battery, when the battery voltage when energized to the load falls below the second threshold value, that is, when the voltage approaches the operating limit of the microcomputer that constitutes the control unit, the burner combustion stops. In addition, since energization to the load is prohibited, it is possible to prevent the control unit from malfunctioning due to inability to properly control the load.

(5) In yet another embodiment of the present invention, when the battery voltage detected by the battery voltage detection unit is equal to or lower than a first threshold while the load is not energized, the control unit: When the battery voltage detected by the voltage detection unit when the load is energized becomes equal to or less than a second threshold value that is lower than the first threshold value, combustion in the burner and energization of the load are prohibited.

According to this embodiment, by setting the second threshold a little higher than the operating limit of the microcomputer constituting the control unit, when the battery voltage in a state where the load is not energized is equal to or lower than the first threshold, That is, when the battery is exhausted and the battery voltage when the load is energized becomes equal to or lower than the second threshold, that is, when the voltage becomes near the operating limit of the microcomputer that constitutes the control section, Since combustion in the burner and energization to the load are prohibited, it is possible to prevent the control unit from malfunctioning due to inability to properly control the load.

According to the present invention, when the battery voltage when the load is not energized is higher than the first threshold value assumed as the battery voltage of a new battery, that is, when the battery is new, the battery voltage when the load is energized When the voltage falls below the second threshold, which is assumed not to fall below unless there is a poor contact between the battery and the connecting terminal, the contact resistance increases due to the poor contact between the battery and the connecting terminal. Since the battery voltage has significantly decreased and a contact failure is reported, the user can take measures to deal with the contact failure. The poor contact can be resolved by removing dirt and dirt and properly resetting the battery.

In addition, a drop in battery voltage due to poor contact between the battery and the connection terminals will not be mistakenly determined as the battery life has expired, and false notifications will not be issued. It is possible to prevent the battery from being wasted by discarding the battery and replacing it with another new battery.

1 is an overall perspective view of a gas stove according to an embodiment of the present invention. FIG. 2 is a front view of a cooking setting section of the gas stove in FIG. 1. FIG. FIG. 2 is an explanatory diagram of gas supply to the stove burner and grill burner of the gas stove in FIG. 1. FIG. FIG. 2 is a block diagram of main parts of the gas stove shown in FIG. 1. FIG. FIG. 6 is a diagram showing an example of changes in battery voltage of a new battery and a exhausted battery when there is no contact failure between the battery and the connection terminal. FIG. 7 is a diagram showing an example of a change in battery voltage of a new battery when a contact failure occurs between the battery and the connection terminal. 2 is a flowchart for explaining the operation of the gas stove in FIG. 1. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas stove as a gas cooker according to an embodiment of the present invention will be described below with reference to the attached drawings.

FIG. 1 is an overall perspective view of a gas stove 1 according to an embodiment of the present invention, and this gas stove 1 is a built-in type gas stove that includes a stove section and a grill section.

A plurality of heating parts 2 are provided on a top plate 11 constituting the top surface of the gas stove 1. In this embodiment, as shown in FIG. 1, stove portions 2a equipped with high-power stove burners 31 as heating portions 2 are provided on the left and right sides as viewed. A trivet 21 is provided on the upper surface of the top plate 11 around each stove burner 31, and the heating unit is connected to the stove burner 31, the trivet 21, the ignition device 23, and the ignition detection device 24 (see FIG. 3). A stove part 2a as 2 is configured.

Further, the gas stove 1 is provided with a grill section 2b as a heating section 2. The grill section 2b of this embodiment is a single-sided grill, and includes a grill compartment formed in the center of the main body of the gas stove 1, a grill top burner 29 (see FIG. 3) provided in the grill compartment, and an ignition device 23. and an ignition detection device 24, the front end of the grill section 2b is open to the front section 12 of the gas stove 1 and is closed by a grill door 28 so as to be openable and closable.

The ignition device 23 uses a high-pressure pulse generated by an igniter (not shown) to cause discharge in the spark plugs provided at the fuel gas discharge ports of the stove burner 31 and the grill top burner 29, thereby igniting the ignition device. It is controlled by a control section 5 in FIG. 4, which will be described later.

The ignition detection device 24 is composed of a thermocouple provided on the stove burner 31 and the grill upper burner 29, and when the ignition is ignited, the control unit 5 recognizes the thermoelectromotive force generated by the heat of the flame.

As shown in FIG. 1, front panels P1 and P2, which together with the grill door 28 constitute the front section 12 of the gas stove 1, are provided on both sides of the grill door 28. An ignition/extinguishing button 14a for igniting and extinguishing the left stove burner 31 is provided above the left front panel P1, and an ignition/extinguishing button 14a for igniting and extinguishing the grill top burner 29 is provided above the right front panel P2. An ignition/extinguishing button 14b for igniting and extinguishing the stove burner 31 on the right side is provided. Further, on the front part 12, a fire power adjustment lever 15 (15a to 15c) that is operated to adjust the heating amount of each heating part 2 is located above each point extinguishing button 14 (14a to 14c) as an operation part. Each is provided.

As shown in FIG. 2, a cooking setting section 7 for the stove is provided below the left front panel P1 of the gas stove 1, and a cooking time setting section 7 for grilling is provided at the lower left of the right front panel P2 of the gas stove 1. A timer setting unit 8 is provided to set the timer. Furthermore, a battery case 13 is provided at the lower right of the front panel P2 on the right side of the gas stove 1. A battery case 13 is provided in which a battery serving as a power source for a microcomputer forming the control unit 5 and various loads is housed.

As shown in FIG. 2, the cooking setting section 7 for the stove includes a setting section and a display section for setting automatic cooking menus for frying, rice cooking, and boiling, as well as a plus key for setting cooking time. The timer input section 71 includes a timer input section 71a and a minus key 71b, and a timer display section 72. For automatic cooking, you can set a temperature control mode that automatically adjusts the burner heat to maintain the set temperature.

FIG. 3 is an explanatory diagram of gas supply to the stove burner 31 and grill top burner 29 of the gas stove 1.

The original gas flow path 18 is branched into a gas flow path 61 for each burner 31, 29, and the branched gas flow path 61 is provided with a safety valve 62 and a main valve 63 from the upstream side. On the downstream side of the main valve 63, a flow path 61c for large fires and a flow path 61d for small fires are provided in parallel, and a latch type solenoid valve 17 is provided in the flow path 61c for large fires. An orifice of2 is provided in the flow path 61d.

In this embodiment, the latch type solenoid valve 17 is an on-off valve provided in the gas passage 61 that supplies fuel gas to each burner 31 and 29, and the opening and closing thereof is controlled by the control unit 5. to cut off the fuel gas supply.

The flow path 61c for large fire and the flow path 61d for small fire merge at the downstream side of the latch type solenoid valve 17 and the downstream side of the orifice of2, and further downstream, the flow path 61c for small fire is connected to the fire power adjustment lever 15. A flow control valve 65 is provided to control the flow rate.

The latch type solenoid valve 17 shifts to the open state by applying a pulse current with the polarity in the valve opening direction, and thereafter maintains the valve open state even after the energization is stopped, and maintains the valve opening state with the polarity in the valve closing direction (valve opening). The valve enters the closed state by applying a pulse current (with the opposite polarity), and thereafter maintains the closed state even after the energization is stopped.

The safety valve 62 is maintained in the open state by the control unit 5 only when flame is detected by the ignition detection device 24, and when the flame is no longer detected, the safety valve 62 is shifted to the closed state by the control unit 5. This prevents the fuel gas from flowing out even if the flame is no longer detected by the ignition detection device 24 due to boiling over or extinguishing due to wind.

In this embodiment, each latch-type solenoid valve 17 corresponding to each burner 31, 29 is energized in the valve-opening direction to open the valve when the fire is extinguished, so that the next ignition can be ignited stably and reliably with strong flame. It is controlled by the control unit 5 to be in the valve state.

To ignite the stove burner 31 and grill top burner 29, the corresponding ignition/extinguishing button 14 is pressed and operated. As a result, the corresponding safety valve 62 and main valve 63 are opened, and fuel gas is supplied to the corresponding stove burner 31 and grill top burner 29 via the latch type solenoid valve 17, which is already in the open state. It is ignited.

To extinguish the stove burner 31 and grill top burner 29, the corresponding extinguish button 14 is pressed and operated. As a result, the main valve 63 closes to extinguish the fire, and the safety valve 62 closes. Furthermore, the latch-type solenoid valve 17 is controlled by the control unit 5 so that it is energized in the valve-opening direction to be in the valve-open state for the next ignition.

FIG. 4 is a block diagram of the main parts of this embodiment.

The gas stove 1 of this embodiment includes a battery 4 with an internal resistance r housed in the battery case 13, a control unit 5 that operates using the battery 4 as a power source to control various parts, and a controller 5 that detects the voltage of the battery 4. A battery voltage detection unit 6, a load operated by the battery 4, for example, various electric components 10 such as a solenoid valve such as the above-mentioned latching type solenoid valve 17 and an igniter, and a "battery alarm" that requests battery replacement. , or a notification section 9 that notifies a "poor contact alarm" indicating poor contact. Contact resistances Ra and Rb occur between each of the positive and negative electrodes of the battery 4 and each connection terminal (not shown) of the battery case 13 that comes into contact with each of these electrodes.

The control unit 5 monitors the battery voltage based on the detection signal S1 from the battery voltage detection unit 6. The control unit 5 that controls the drive of the electrical component 10 that is a load outputs a drive signal S2 to the electrical component 10, and receives an operation signal S3 from the electrical component 10.

Further, the control section 5 controls the driving of the notification section 9 using the drive signal S4.

In this embodiment, the battery voltage of the battery 4 is monitored to determine whether a decrease in battery voltage when driving the electrical component 10 as a load is due to a decrease in the remaining battery power, or whether the battery 4 and the battery case 13 are A "battery alarm" that requests battery replacement as described above, or a "poor contact alarm" that indicates a poor contact ” is notified by the notification unit 9.

Here, referring to FIGS. 5 and 6, there are cases in which the contact between the battery 4 and the connection terminal of the battery case 13 is normal, and cases in which the contact between the battery 4 and the connection terminal in the battery case 13 is defective. I will explain.

FIG. 5 shows an example of a change in battery voltage when the contact between the battery 4 and the connection terminal of the battery case 13 is normal. In the figure, battery voltage Vn shows an example of voltage change of a new battery, and battery voltage Ve shows an example of voltage change of a exhausted battery.

The battery 4 is composed of two 1.5V dry batteries connected in series in a battery case 13, and the voltage of the new battery 4 at no load when the electric component 10, which is a load, is not being driven is as follows. , for example, 3.0V.

The first threshold L1 is a voltage value that is assumed to be the battery voltage of a new battery when there is no load, and in this example, it is 2.8V.

The second threshold L2 is a voltage value that is assumed not to fall below when the battery is new and there is no contact failure between the battery and the connection terminal when the electric component 10, which is the load, is energized. be.

In this embodiment, the second threshold L2 is set to a voltage value slightly higher than the operating limit of the microcomputer that constitutes the control unit 5, and in this example, it is 2.0V. When the battery voltage drops due to the drive of the load and the voltage drop value becomes equal to or less than the second threshold value, the control unit 5 may not be able to properly control the load and may malfunction. prohibits the ignition and combustion of the burners 29 and 31 and the driving of the load, and also drives the notification section 9 to notify a battery alarm requesting immediate battery replacement.

As shown in FIG. 5, the battery voltage Vn of the new battery 4 in the no-load state when the electrical component 10 as a load is not being driven is, for example, 3.0V, which is 2.0V, which is the first threshold value L1. It exceeds 8V. In this state, when the electric component 10, which is a load, is driven, for example, the load, for example, an igniter, is energized to perform an ignition operation from the first time t1 to the second time t2, the new battery 4 Battery voltage Vn drops. At this time, the drop in battery voltage Vn is small, and the voltage drop value either exceeds the first threshold L1 of 2.8V, or falls below the first threshold L1 but falls below the second threshold L2 of 2.0V. There isn't.

As the battery 4 becomes exhausted due to use, the battery voltage of the battery 4 decreases, and the battery voltage Ve of the exhausted battery 4 is, for example, 2.2V at no load when the electrical component 10 that is a load is not being driven. , which exceeds the second threshold L2 of 2.0. In this state, when the electrical component 10, which is a load, is driven, for example, the load, for example, an igniter, is energized to perform an ignition operation from the third time t3 to the fourth time t4, the exhausted battery 4 is The battery voltage Ve drops, and the voltage drop value falls below the second threshold L2.

When the voltage drop value of the battery voltage Ve falls below the second threshold L2, the control unit 5 determines that the electric component 10, which is a load, cannot be properly controlled and there is a risk of malfunction, and the burner 29, 31 is When the burners 29 and 31 are in combustion, the gas supply to the burners 29 and 31 is stopped to stop the combustion of the burners 29 and 31, and the drive of the electric component 10 is stopped. In other words, the gas stove 1 is made unusable. Furthermore, the notification section 9 is activated to issue a battery alarm requesting immediate battery replacement. As a result, the notification unit 9 causes, for example, a battery replacement lamp to blink and a buzzer to sound, for example, once.

As a result, the user recognizes that the battery life has come and needs to be replaced immediately, and replaces the battery 4 with a new one.

Next, a case where the contact between the battery 4 and the connection terminal of the battery case 13 is poor will be described with reference to FIG. 6. FIG. 6 shows an example of a change in the battery voltage Vn of a new battery when the contact between the battery 4 and the connection terminal of the battery case 13 is poor.

Poor contact between the battery 4 and the connection terminals of the battery case 13 can occur, for example, when the battery 4 is replaced, dust or dirt may adhere to each pole of the battery 4 or the connection terminals of the battery case 13, or the battery 4 may not connect to the battery case 13. This occurs because the battery case 3 is not set properly or a film is formed on the connection terminals of the battery case 3.

When a contact failure occurs between the battery 4 and the connection terminal of the battery case 13, as shown in FIG. The voltage is almost the same as when no contact failure occurs, for example, 3.0V, which exceeds the first threshold L1 of 2.8V.

In this state, when the electric component 10, which is a load, is driven, for example, the load, for example, an igniter, is energized to perform an ignition operation from the first time t1 to the second time t2, the battery 4 and the battery case Since the contact resistance has increased due to poor contact with the connection terminal 13, the voltage drop in the battery voltage Vn of the new battery 4 due to driving the load increases. At this time, the voltage drop value of the battery voltage Vn falls below the first threshold L1 and becomes 2.0V or less, which is the second threshold L2.

When a contact failure occurs between the battery 4 and the connection terminal of the battery case 13 as described above, the contact resistance increases, so that the voltage drop value of the battery voltage of the new battery 4 when driving a load is lowered to the second threshold value. The value becomes less than or equal to L2.

In this manner, when the voltage drop value of the battery voltage Vn becomes equal to or less than the second threshold value, the notification unit 9 is driven to issue a warning of poor contact. This notification is performed in a manner different from the above-mentioned battery alarm requesting battery replacement. For example, the notification unit 9 causes the battery replacement lamp to blink and the buzzer to emit a beep, for example. Make a beep sound repeatedly.

Further, when the voltage drop value of the battery voltage Vn becomes equal to or less than the second threshold value L2, the control unit 5 determines that the electric component 10, which is a load, cannot be properly controlled and there is a risk of malfunction. . Prohibit driving.

By this contact failure notification, the user can take measures corresponding to the contact failure, such as cleaning each pole of the battery 4 and the connection terminals of the battery case 13 to remove dust and dirt, and removing the battery 4. , properly set it back into the battery case 13.

This eliminates the poor contact between the battery 4 and the connection terminal of the battery case 13, resulting in a normal contact state as shown in FIG. 5 above.

FIG. 7 is a flowchart of the battery voltage monitoring control described above.

The battery voltage during no-load when the electrical component 10 as a load is not being driven is measured (step S1), and it is determined whether the measured battery voltage during no-load is less than or equal to the second threshold L2 (step S2). When the battery voltage during no-load is less than the second threshold L2, as described above, the control unit 5 cannot appropriately control the electrical component 10, which is the load, and there is a risk of malfunction. , notifies a battery alarm requiring immediate battery replacement, and prohibits the ignition of the burners 29, 31, or, if the burners 29, 31 are in combustion, prevents gas from flowing to the burners 29, 31. The supply is stopped, combustion of the burners 29 and 31 is stopped, and the gas stove 1 is rendered unusable, and the process is ended (step S3).

In step S2, if the battery voltage at no load is not less than the second threshold L2, it is determined whether the battery voltage at no load is less than or equal to the first threshold L1 (step S4). When the battery voltage is less than or equal to the first threshold L1, the battery is exhausted, and the electric component 10, which is a load, is driven and the battery voltage when driving the load is measured (step S5).

The load may be driven in step S5 forcibly, but for example, the load may be driven in response to an ignition operation by the user, such as driving an igniter, driving a solenoid valve, or maintaining a set temperature. During cooking in the temperature control mode that automatically adjusts the firepower of the burner, a solenoid valve may be driven to automatically adjust the firepower when necessary.

Next, it is determined whether the voltage drop value of the battery voltage during load driving measured in step S5 is less than or equal to the second threshold L2 (step S6), and the voltage drop value of the battery voltage during load driving is determined to be equal to or lower than the second threshold L2. If it is less than the second threshold value L2, it is determined that the battery voltage of the exhausted battery during load driving has become less than the second threshold value, and the process moves to step S3. In step S3, the battery is at the end of its service life and a battery alarm is issued to request immediate replacement of the battery, and the ignition of the burners 29 and 31 is prohibited, or if the burners 29 and 31 are in the process of combustion, , the supply of gas to the burners 29, 31 is stopped, the combustion of the burners 29, 31 is stopped, and the process is ended with the gas stove 1 rendered unusable.

In step S6, if the battery voltage during load driving is not equal to or lower than the second threshold L2, the process ends.

In the above step S4, when the battery voltage at no load is not below the first threshold L1, that is, when the battery voltage at no load is higher than the first threshold L1, it is determined that the battery is new and the process moves to step S7, The electrical component 10, which is a load, is driven and the battery voltage when driving the load is measured.

The driving of the load in this step S7 is similar to step S5 above, and may be performed forcibly, but for example, the igniter as the load is driven in response to the ignition operation by the user, or the solenoid valve is driven. Or, when cooking is in temperature control mode, which automatically adjusts the burner firepower to maintain the set temperature, it can be done when necessary, such as by driving a solenoid valve to automatically adjust the firepower. It's okay.

Next, it is determined whether the voltage drop value of the battery voltage during load driving measured in step S7 is less than or equal to the second threshold L2 (step S8), and the voltage drop value of the battery voltage during load driving is determined to be equal to or lower than the second threshold L2. 2. When the voltage is below the threshold L2, the battery voltage drops significantly when driving a load due to an increase in contact resistance due to poor contact between the battery 4 and the connection terminals of the battery case 13, even though the battery is new. It is assumed that the value has become equal to or less than the second threshold L2, and the process moves to step S9.

In step S9, a warning of poor contact between the battery 4 and the connection terminal of the battery case 13 is issued. At the same time, the ignition of the burners 29, 31 is prohibited, or if the burners 29, 31 are in combustion, the gas supply to the burners 29, 31 is stopped to stop the combustion of the burners 29, 31. Then, the gas stove 1 is made unusable and the process is ended (step S9).

In step S8, if the battery voltage during load driving is not equal to or lower than the second threshold L2, the process ends.

In this way, according to the present embodiment, when the battery voltage under no load is higher than the first threshold L1, that is, when the battery is new, the voltage drop value of the battery voltage when driving the load is , it is determined whether or not the battery is below the second threshold L2, and if it is below the second threshold L2, the battery is new and the battery life has not yet been reached, so the problem is caused by poor contact between the battery and the connection terminal. Due to the increase in contact resistance, a large drop in battery voltage occurs during load driving, and a contact failure between the battery and the connection terminal is reported.

This allows the user to take measures in response to poor contact, such as cleaning each electrode and connection terminal of the battery to remove dust and dirt, and properly resetting the battery to prevent poor contact. It can be resolved.

Therefore, as in Patent Document 1, even though the battery life has not yet come to an end, the battery life is shortened due to a decrease in battery voltage due to an increase in contact resistance due to poor contact between the battery and the terminals of the battery case. This prevents erroneous determination and notification that the arrival has arrived. This prevents the user from discarding a new battery whose battery life has expired and replacing it with another new battery, thereby preventing wasted batteries.

Furthermore, since notification of a poor contact warning and notification of a battery warning requesting battery replacement are different, the user can respond appropriately to each, improving convenience.

In the above embodiment, the second threshold L2 for determining whether there is a contact failure is
Although the voltage value slightly higher than the operating limit of the microcomputer constituting the control unit 5 is used as a threshold value for battery replacement, the second threshold value L2 may be another threshold value higher than the threshold value for battery replacement.

In the embodiment described above, when the voltage drop value of the battery voltage of the exhausted battery when driving a load becomes equal to or less than the second threshold value, a battery alarm is immediately issued to request battery replacement, and the gas stove 1 is rendered unusable. However, in addition to this configuration, a third threshold value higher than the second threshold value L2, for example, 2.1V, is set, and the voltage drop value of the battery voltage when driving the load of the exhausted battery is below this third threshold value. When this occurs, an alarm prompting battery replacement may be issued, that is, a pre-warning may be issued prior to the battery alarm.

1 Gas stove 4 Battery 5 Control unit 6 Battery voltage detection unit 9 Notification unit 10 Electrical components (load)
14-point fire extinguishing button (operation section)

Claims (5)

Burna and
an operation unit operated to turn on and extinguish the burner;
A load that operates using a battery as a power source,
a control unit that controls combustion of the burner and controls energization of the load to control operation of the load based on the operation of the operation unit;
a battery voltage detection unit that detects the voltage of the battery;
a notification unit that is controlled by the control unit to notify a decrease in battery voltage;
and a connecting terminal that comes into contact with each electrode of the battery,
Electric power from the battery is supplied to the load and the control unit via the connection terminal,
The control unit is configured to detect a battery voltage detected by the battery voltage detection unit when the load is energized when the battery voltage detected by the battery voltage detection unit is higher than a first threshold value when the load is not energized. When the battery voltage becomes equal to or lower than a second threshold value that is lower than the first threshold value, the notification unit reports a decrease in battery voltage due to poor contact between the battery and the connection terminal;
A gas cooker with this feature. The control unit detects the battery voltage detected by the voltage detection unit when the load is energized when the battery voltage detected by the battery voltage detection unit is equal to or lower than a first threshold while the load is not energized. When the battery voltage becomes equal to or lower than a second threshold value that is lower than the first threshold value, the notification unit notifies a decrease in the battery voltage due to a decrease in the remaining capacity of the battery.
The gas cooker according to claim 1. The control unit causes the notification unit to notify a decrease in battery voltage due to a poor contact between the battery and the connection terminal and a decrease in battery voltage due to a decrease in the remaining capacity of the battery, in different ways.
The gas cooker according to claim 2. The control unit is configured to detect a battery voltage detected by the battery voltage detection unit when the load is energized when the battery voltage detected by the battery voltage detection unit is higher than a first threshold value when the load is not energized. prohibiting combustion in the burner and energization of the load when the battery voltage becomes equal to or less than a second threshold value that is lower than the first threshold value;
The gas cooker according to any one of claims 1 to 3. The control unit detects the battery voltage detected by the voltage detection unit when the load is energized when the battery voltage detected by the battery voltage detection unit is equal to or lower than a first threshold while the load is not energized. prohibiting combustion in the burner and energizing the load when the battery voltage that is applied becomes equal to or less than a second threshold value that is lower than the first threshold value;
The gas cooker according to any one of claims 1 to 4.

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