JP5080956B2 - Monitoring device for power-off state in cooking device - Google Patents

Description

  In the present invention, whether the object to be heated is placed on the placement part for placing the object to be heated to be heated by the heating means or not placed is not placed. A combustion control for starting the heating operation of the heating unit by a heating start command by the heating command unit and stopping the heating operation of the heating unit by a heating stop command by the heating command unit; A heating control means for performing cooking heating control for controlling the heating operation of the heating means based on the detection information of the placement state detecting means, and a power supply when a power-on condition is satisfied by a heating start command of the heating command means Power supply control means for supplying power to the heating control means and for cutting off the supply of power to the heating control means when a power-off condition is satisfied by a heating stop command of the heating command means. About power supply switching state monitoring device in cooker.

  The heating cooker is, for example, a heating unit composed of a burner or the like when the non-mounting state is detected by the mounting state detecting unit even when a heating start command is commanded by the heating commanding unit as the heating control for cooking. To perform a check process that does not execute the heating operation, or a heating amount lowering process that reduces the heating amount when a non-mounted state is detected by the mounting state detecting means while the heating means is performing a heating operation. Thus, appropriate heating cooking can be performed on the object to be heated based on the detection information of the placement state detection means.

  In such a heating cooker, when the mounting state detection means detects the mounting state when the power-off condition is satisfied by the heating stop command of the heating command means, the mounting state is thereafter Therefore, it is necessary to monitor whether or not the state changes to the non-mounting state. Conventionally, there has been a configuration as follows.

  That is, if the mounting state detection unit detects the mounting state when the power-off condition is satisfied by the heating stop command of the heating command unit, the power supply to the heating control unit is continued, and then It is configured to be able to detect that the placement state detection means has switched from the placement state to the non-placement state, and the placement state detection means has switched from the placement state to the non-placement state. When detected, there is a configuration in which the power control means stops the power supply to the heating control means after the heating control means performs a predetermined process (for example, see Patent Document 1).

  Incidentally, if the mounting state detection means detects the mounting state when the power-off condition is satisfied by the heating stop command of the heating command means, whether or not the mounting state changes from the mounting state to the non-mounting state thereafter. In Japanese Patent Application Laid-Open No. H10-228707, there is a possibility that an abnormal state such as a failure of the placement state detecting means to be fixed due to boiled juice falling from the object to be heated may occur. This is to determine whether or not a state has occurred.

  That is, in the example illustrated in Patent Document 1, in order to detect that such an abnormal state has occurred, the heating control unit is mounted by the mounting state detection unit in a state where power is supplied. When the installation time is detected, the abnormality countermeasure processing is executed when the accumulated value reaches the abnormality determination set time. When the mounting condition detection unit detects the mounting state and continues to supply power to the heating control unit when the cutting condition is satisfied, the mounting state detection unit changes from the mounting state to the non-mounting state. When the switching is detected, the integrated value of the time is reset as the predetermined processing so that unnecessary abnormality countermeasure processing is not performed when the mounting state detection means is operating normally. Do it .

  In other words, after the cooking operation is stopped by stopping the heating operation of the heating means, the user changes the placement state of the heated object by lifting the heated object from the placement unit or moving it to another place. When the mounting state detecting means detects that the mounting state has switched from the mounting state to the non-mounting state, the predetermined processing such as resetting the integrated value as described above is appropriately performed. Yes.

JP 2006-97976 A

  However, in the above-described conventional configuration, when the mounting state detection unit detects the mounting state when the power-off condition is satisfied by the heating stop command of the heating command unit, the mounting state detection unit is not mounted. Since the power supply to the heating control means is continued until the placement state is detected, the operation for changing the placement state of the object to be heated is performed after the cooking is finished and the heating operation of the heating means is stopped. If a long period of time has passed, the state where the non-mounting state is not detected by the mounting state detection unit continues for a long time, and the time during which power is supplied to the heating control unit There is a disadvantage that it becomes longer and power consumption increases. Some types of cooking devices of this type are equipped with a battery as a power source, and those equipped with a battery as described above are inconvenient because the battery is consumed in a short period of time and the replacement time is shortened.

  An object of the present invention is to appropriately detect that the mounting state detection unit has switched from the mounting state to the non-mounting state after the power-off condition is satisfied by the heating stop command of the heating command unit. Although it is possible, it exists in the point which provides the monitoring apparatus for power-off states in the cooking-by-heating machine which can suppress an electric power consumption to a small thing.

The monitoring device for the power-off state in the heating cooker according to the present invention is whether or not the object to be heated is placed on the placement part on which the object to be heated to be heated by the heating means is placed. A mounting state detecting means for detecting whether the non-mounting state is not placed;
Combustion control that starts the heating operation of the heating unit by a heating start command by the heating command unit and stops the heating operation of the heating unit by a heating stop command by the heating command unit, and detection information of the placement state detection unit Heating control means for executing cooking heating control for controlling the heating operation of the heating means based on
When the power-on condition is satisfied by the heating start command of the heating command means, power is supplied from the power source to the heating control means, and when the power-off condition is satisfied by the heating stop command of the heating command means, the power is supplied to the heating control means. Power supply control means for cutting off the supply of power,
The first characteristic configuration is that when the power supply control unit switches from a state in which power is supplied to the heating control unit to a state in which the supply of power is cut off, the installation state detection unit detects the installation state. In this case, the placement state detection means is set to a state in which the placement state output is output, and after that, until the power supply control means switches to a state in which power is supplied to the heating control means. If the detection of the placement state is continued, the state of outputting the previous placement state output is maintained, and when the previous placement state detection means detects the non-placement state, the output of the non-placement state is output. A change state detection circuit that switches to a state is provided,
The heating control means is configured to be able to read the output of the change state detection circuit when the power supply is switched from a state where power supply is cut off to a state where power is supplied.

  According to the first characteristic configuration, the power control means supplies power from the power source to the heating control means when the heating start command is satisfied by the heating start command of the heating command means, and turns off the power by the heating stop command of the heating command means. When is satisfied, the supply of power to the heating control means is cut off. Then, when the power-off condition is satisfied by the heating stop command of the heating command means and the power supply control means switches from the state in which power is supplied to the heating control means to the state in which the power supply is cut off, the placement state detection means is placed When the state is detected, the change state detection circuit is set to a state in which the output for the placement state is output.

  The change state detection circuit is for the mounting state described above when the mounting state detection unit detects the mounting state at the time when the power supply control unit cuts off the supply of power from the state in which the power is supplied to the heating control unit. The power supply control means is set to detect the placement state when the power supply control means supplies power to the heating control means, and then the power supply control means is set. The case where the mounting state detection unit continues the state of detecting the mounting state until the time when the supply of power is cut off is also included.

  In addition, after the power supply control unit switches to the state where the power supply to the heating control unit is cut off, the mounting state detection unit is mounted until the power supply control unit switches to the state where the power supply control unit supplies power to the heating control unit. If the detection of the placement state is continued, the change state detection circuit maintains the state of outputting the placement state output.

  On the other hand, after the power supply control means switches to a state where the power supply to the heating control means is cut off, the mounting state detection means is not activated until the power supply control means switches to a state where power is supplied to the heating control means. When the mounting state is detected, the change state detection circuit is switched to a state of outputting a non-mounting state output.

  Then, when the heating control means is switched from the state where the power supply is cut off to the state where the power is supplied, the power supply to itself is cut off by reading the output of the change state detection circuit. Sometimes, it can be determined whether the mounting state detection means maintains the mounting state or the non-mounting state is detected, and it is possible to perform a predetermined process according to the determination result.

  As the change state detection circuit, for example, when the mounting state detection unit detects the mounting state, the capacitor is charged, and when the mounting state detection unit detects the non-loading state, the charge charged by the capacitor is charged. When the signal level of the input changes according to the circuit that detects the voltage between the terminals of the capacitor and the detection state of the mounting state detection means, the output changes accordingly and the mounting is performed. If the signal level changes corresponding to the change from the state to the non-mounting state, it is configured using a circuit with a simple configuration and low power consumption, such as an output holding circuit that holds the output after the change. It is possible.

  As described above, after the power-off condition is satisfied, the change state detection circuit with a simple configuration and low power consumption in the state where the power supply to the heating control unit is cut off is used. By monitoring the detection state, the power consumption can be reduced.

  Therefore, according to the first feature configuration, after the power-off condition is satisfied by the heating stop command of the heating command means, it is appropriately determined that the placement state detection means has switched from the placement state to the non-placement state. It has become possible to provide a monitoring device for the power-off state in a heating cooker that can be detected but can reduce power consumption.

In the second feature configuration of the present invention, in addition to the first feature configuration, the placement state detection means is in a non-conduction state if the placement state is in the placement state and in a conduction state if the placement state is not in the placement state. It is equipped with a heated object detection switch,
The change state detection circuit is
A capacitor capable of storing and discharging electric charge;
When power is supplied to the heating control means and the heated object detection switch is in a non-conductive state, electric charge is accumulated in the capacitor, and power supply is cut off from a state where power is supplied to the heating control means. If the heated object detection switch is maintained in a non-conductive state after switching to a state in which the heated object is detected, the capacitor accumulates electric charge, and the heated object detection switch becomes conductive from the non-conductive state. When the state is switched, the electric charge accumulated in the capacitor is discharged, and the voltage between the terminals of the capacitor when the electric charge is accumulated in the capacitor is output as the above-described output for the arrangement state. And a charge / discharge circuit that outputs the voltage between the terminals of the capacitor after being discharged as the output for the non-mounting state.

  That is, according to the second characteristic configuration, electric charge is accumulated in the capacitor in a state where electric power is supplied to the heating control means and the heated object detection switch is in a non-conduction state. In other words, when the mounting state detecting means detects the mounting state when the power supply control means switches from the state where the power is supplied to the heating control means to the state where the power supply is cut off, the capacitor is Therefore, the charge / discharge circuit is set in a state of outputting a mounting state output.

  Then, after switching from the state where power is supplied to the heating control means to the state where power supply is cut off, if the heated object detection switch maintains the non-conductive state, the capacitor has accumulated electric charge. In other words, the voltage between the terminals of the capacitor is kept high, but when the object to be heated detection switch is switched from the non-conductive state to the conductive state, the charge accumulated in the capacitor is discharged and the voltage between the terminals of the capacitor is lowered.

  In other words, if the capacitor accumulates electric charge and maintains the state in which the electric charge is accumulated, the voltage between the terminals of the capacitor becomes high, and the voltage between the terminals of the capacitor at that time is output as the output for the above-described device state. It will be. On the other hand, when the electric charge of the capacitor is discharged, the voltage between the terminals of the capacitor is lowered, and the voltage between the terminals of the capacitor at that time is output as the above-described output for the placement state.

  And, when the heating control means is switched from a state where the supply of power is cut off to a state where power is supplied, the voltage across the terminals of the capacitor can be read, and due to the difference in the voltage between the terminals of the capacitor, It is possible to determine whether or not the placement state detection means has switched from the placement state to the non-placement state when the supply of power to itself is interrupted.

  In addition, when the electric power is supplied to the heating control means, electric charges are accumulated in the capacitor, and when the supply of electric power to the heating control means is cut off, the object detection switch provided in the mounting state detection means Is used to switch between the state of maintaining the charge storage state of the capacitor and the state of discharging the charge, so if there is almost no spontaneous discharge of the capacitor, there is almost no power consumption and the capacitor discharges spontaneously. In some cases, it is only necessary to supply a small amount of power to replenish spontaneously discharged power, and the amount of power consumption can be reduced, and the change state detection circuit can be configured by a low power consumption type circuit.

  Therefore, according to the second feature configuration, the change state detection circuit can be configured with a simple configuration and a low power consumption type circuit, and the cooking device capable of suppressing the power consumption to a low level. It has become possible to provide a monitoring device for the power-off state in

According to a third feature configuration of the present invention, in addition to the first feature configuration, the placement state detection unit is in a non-conduction state if the placement state is the placement state, and is in a conduction state if the placement state is not in the placement state. It is equipped with a heated object detection switch,
The change state detection circuit is
The heated object detection switch is connected to the input unit in a form in which the input voltages input to the input unit are different between the non-conductive state and the conductive state, and the input unit includes the input voltage When the input voltage corresponding to the non-conducting state is input, the first output voltage is output as the output for the above described state, and the voltage input to the input unit is determined from the input voltage corresponding to the non-conducting state. When switching to the input voltage corresponding to the conductive state, the second output voltage is switched to a state in which the second output voltage as the non-mounting state output different from the first output voltage is output, and the second processing is performed until reset processing is performed. The output holding circuit that holds the output voltage is provided.

  According to the third feature configuration, the object to be heated detection switch is connected to the input part of the output holding circuit in a form in which the input voltage is different between the non-conductive state and the conductive state. When the input voltage corresponding to the non-conducting state is input to the part, the first output voltage is output as the mounting state output, so that the power supply control unit supplies power to the heating control unit. When the mounting state detecting means detects the mounting state when switching to the state of shutting off, the output holding circuit is set to a state of outputting the first output voltage.

  Then, after switching from the state where power is supplied to the heating control means to the state where power supply is cut off, if the heated object detection switch maintains the non-conductive state, the output holding circuit is the first. The state of outputting the output voltage is maintained.

  Further, after switching from the state where power is supplied to the heating control means to the state where power supply is cut off, the heated object detection switch is switched from the non-conductive state to the conductive state and input to the input unit. When the voltage is switched from the input voltage corresponding to the non-conductive state to the input voltage corresponding to the conductive state, the output holding circuit outputs a second output voltage as a non-mounting state output different from the first output voltage. The second output voltage is held until the state is switched to the reset process.

  The heating control means can read the output of the output holding circuit when the power supply is switched from the blocked state to the supplied state, and the output of the output holding circuit can It is possible to determine whether or not the placement state detection unit has switched from the placement state to the non-placement state when the supply is interrupted.

  Further, the output holding circuit as described above can be configured with a simple configuration such as a low power consumption type gate circuit and a low power consumption type circuit. For example, since the output switching is surely switched to either the high level or the low level, the output does not become unstable, and the reading by the heating control means can be easily performed accurately.

  Therefore, according to the third feature configuration, the change state detection circuit can be configured with a simple configuration and a low power consumption type circuit, and the cooking device capable of suppressing power consumption to a low level. It has become possible to provide a monitoring device for the power-off state in

In addition to any of the first feature configuration to the third feature configuration, the fourth feature configuration of the present invention,
The heating control means
In the state in which the previous placement state is detected by the previous placement state detection means, an indicator for determining the placement state progress that appears regularly or irregularly with the passage of time is integrated and the integrated value is obtained. The integrated value calculation process for resetting the integrated value is executed when the non-mounted state is detected by the obtained mounting state detecting means, and the integrated value integrated in the integrated value calculating process is used for abnormality determination. It is configured to execute abnormality countermeasure processing when the reference value is reached, and
After determining that the output for the non-mounting state is output in the change state detection circuit after the power supply is started and started for the self, the integrated value of the indicator for determining the mounting state progress described above Is configured to reset.

  According to the fourth characteristic configuration, the heating control means executes the integrated value calculation process in a state where power is supplied to itself. That is, in the state in which the mounting state is detected by the mounting state detection means, the indicator for determining the mounting state progress that appears regularly or irregularly with the passage of time is integrated and the integrated value is obtained. The integrated value is reset when the non-mounting state is detected by the mounting state detecting means. When the integrated value integrated in the integrated value calculation process reaches the abnormality determination reference value, the abnormality countermeasure process is executed.

  For example, in the case where there is an abnormality in which the placement state is detected even though the object to be heated is not placed on the placement unit due to a failure of the placement state detection means, etc., the placement state detection Since the integrated value is not reset when the non-mounting state is detected by the means, the integrated value reaches the abnormality determination reference value with the use of the cooking device, so that the abnormality countermeasure processing is executed. Become. By performing the abnormality countermeasure processing in this way, it is possible to avoid the disadvantage of continuing to use in the state where an abnormality has occurred.

  Then, when the heating control means determines that the output for the non-mounting state is output in the change state detection circuit when the power supply is switched from the blocked state to the state where the power is supplied, Even when the mounting state is detected by the mounting state detection unit when power supply to the heating control unit is started, the integrated value of the indicator for determining the mounting state progress is reset. Become.

  That is, even when the object to be heated is placed on the placement unit while the power to the heating control unit is being supplied, the supply of power to the heating control unit is interrupted. If the object to be heated is not placed on the placement unit during the operation, the integrated value of the indicator for determining the placement state progress will be reset, so no abnormality has occurred. Nevertheless, the disadvantage that the abnormality countermeasure processing is performed can be avoided.

  Therefore, according to the fourth feature configuration, when an abnormality such as a failure of the mounting state detection unit has occurred, the abnormality countermeasure process can be performed appropriately, but no abnormality has occurred. It is possible to avoid the disadvantage that abnormality countermeasure processing is performed.

  According to a fifth characteristic configuration of the present invention, in addition to the fourth characteristic configuration, when the heating control unit is instructed to start heating by the heating command unit, the previous mounting state is detected by the mounting state detection unit. It is configured to determine whether or not it is a placement detection state at the start of heating, and the number of times that it is determined that the placement detection state is at the start of heating is used as an index for determining the placement state progress The abnormality countermeasure process is executed when the integrated value of the number of times of integration and the number of times of determination of being in the mounting detection state at the start of heating is equal to or greater than the number of times set as the abnormality determination reference value. is there.

  According to the fifth feature configuration, whether the heating control means is in a heating start placement detection state in which the placement state is detected by the placement state detection means when a heating start command is commanded by the heating command means. Is determined. When it is detected that the placement detection state at the start of heating is detected when the heating start command is issued, the placement state detection means is operating normally and the object to be heated is properly placed on the placement portion. It is assumed that there is a mounted state, or an abnormal state in which the mounted state detecting means is stuck in the mounted state.

  If the placement state detection means is operating normally and the object to be heated is properly placed on the placement part, then the user lifts the object to be heated and the object to be heated from the placement part. Since the non-mounting state is detected by the mounting state detecting means, the integrated value of the number of times determined to be the mounting detection state at the start of heating is reset.

  However, when the mounting state detection unit is in an abnormal state such as being stuck in a state where the mounting state is detected, the non-mounting state is not detected by the mounting state detection unit. The integrated value is not reset and continues to be integrated thereafter. Then, when the integrated value of the number of times that it is determined that the state is the placement detection state at the start of heating is equal to or greater than the number of times set as the abnormality determination reference value, the state in which the placement state detection unit detects the placement state is long. It is determined that the abnormal state has elapsed, and the abnormality countermeasure process is executed.

  Therefore, according to the fifth characteristic configuration, when the placement state detection unit is operating normally, the abnormality countermeasure process is not executed, and the placement state detection unit remains in a state of detecting the placement state. When it is in an abnormal state such as being stuck, it is possible to accurately execute the abnormality countermeasure process.

  According to a sixth feature configuration of the present invention, in addition to the fourth feature configuration, the heating control means uses the time during which the placement state is detected by the placement state detection means to determine the placement state progress determination. And the abnormality countermeasure processing is executed when the integrated value of the time reaches the abnormality determination set time as the abnormality determination reference value.

  According to the sixth characteristic configuration, the heating control unit integrates the time during which the mounting state is detected by the mounting state detection unit as an index for determining the mounting state progress. When the state detection means is operating normally, when the user lifts the object to be heated and removes the object to be heated from the placement part, the placement state detection means detects the non-placed state. The integrated value of the time during which the installation state is detected is reset.

  However, when the mounting state detection unit is in an abnormal state such as being stuck in a state of detecting the mounting state, the mounting state detection unit does not detect the non-mounting state. Since the integrated value is not reset, the time during which the mounting state is detected by the mounting state detecting means is not reset but continues to be integrated. Then, when the integrated value of the time reaches the abnormality determination set time as the abnormality determination reference value, the abnormality countermeasure processing is executed.

  Therefore, according to the sixth feature configuration, when the placement state detection unit is operating normally, the abnormality countermeasure process is not executed, and the placement state detection unit remains in a state of detecting the placement state. When it is in an abnormal state such as being stuck, it is possible to accurately execute the abnormality countermeasure process.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described based on the drawings.
As shown in FIG. 1, the gas stove as the heating cooker is constituted by a built-in type gas stove provided with a grill portion 3 provided with three stove burners 1a, 1b, 1c and a grill burner 2 (see FIG. 2). The three stove burners 1a, 1b, and 1c are configured by a standard burner 1a, a small burner 1b, and a high thermal power burner 1c.

  Also, a grill exhaust port 4 for exhausting combustion exhaust gas from the grill portion 3 is formed, and the top surface of the gas stove is covered with a glass top plate 5. A standard burner 1 a, small Corresponding to each of the burner 1b and the high thermal power burner 1c, the five virtues 6 are placed and supported as a placing portion for placing an object to be heated (a pan or the like) to be heated. On the back surface side of the top plate 5, the top surface display unit 70 that displays the fire power of each of the standard burner 1 a, the small burner 1 b and the high burner 1 c and the point fire extinguishing state of the grill burner 2 is visible through the top plate 5. Is provided.

  The top surface display unit 70 includes three top surface heat power display units 71 corresponding to the standard burner 1a, the small burner 1b, and the high heat power burner 1c, and a grill combustion display unit 73 corresponding to the grill burner 2, The top surface thermal power display unit 71 is configured to light up and display a number of LED lamps corresponding to the amount of combustion (thermal power) using a plurality of LED lamps as a level meter. The grill combustion display unit 73 is composed of one LED lamp, and when the grill burner 2 is ignited, the LED lamp is turned on.

  As shown in FIG. 1, on the front side of the gas stove, a manual operation unit S is provided for instructing the ignition and extinguishing of the standard burner 1a, the small burner 1b, the high thermal power burner 1c and the grill burner 2, the thermal power adjustment, and various settings. As shown in FIG. 2, the operation control unit H provided with a microcomputer and configured to execute various controls is based on the operation state instructed by the manual operation unit S. The burner 1b, the high thermal power burner 1c, and the grill burner 2 are controlled.

  As shown in FIG. 2, each of the standard burner 1a, the small burner 1b, and the high thermal power burner 1c is provided with a spark plug 7 and a thermocouple 8 for detecting an ignition state. It is composed of a double-sided burner having a pair of lower surface burners 2b, 2c, and each of the upper surface burner 2a and the pair of left and right lower surface burners 2b, 2c has a spark plug 7 and a thermocouple 8 for detecting an ignition state. Is provided.

Further, in each of the standard burner 1a and the high thermal power burner 1c, as shown in FIG. 2 and FIG. 3 (however, only the standard burner 1a is shown in FIG. 3), the object to be heated is placed on the virtues 6. A placement state detection unit D is provided as a placement state detection means for detecting whether the placement state is a placement state or a non-placement state that is not placed.
The placement state detection unit D is pushed down as the bottom of the object to be heated placed on the virtues 6 comes into contact with the placement state detection position for detecting the placement state and the placement state. An up-and-down movable part 9b that is movable up and down over a non-placed state detection position for detecting the non-placed state above the detection position and that is urged to return to the non-placed state detected position. The telescopic mechanism 9 having the above and the vertically movable portion 9b is located at the above-described placement state detection position to detect the placement state (off state), and the top and bottom movable portion 9b detects the non-placed state. A heated object detection switch 10 is provided as a detection unit that detects the non-mounted state (on state) by being positioned.

As shown in FIG. 3, the telescopic mechanism 9 is movable up and down in a state where the vertically movable portion 9b is urged upward by a spring (not shown) to the guide support portion 9a fixed to the casing. It is configured to support. When the object to be heated is not placed on the virtues 6, the non-mounting state in which the up and down movable portion 9 b is protruded from the upper end portion for receiving the object to be heated in the virtues 6 by the return biasing force. The stretched state returns to the state detection position, and the heated object detection switch 10 is turned on. In addition, as the object to be heated is placed on the virtues 6, the vertically movable portion 9b is pushed down by the bottom of the object to be heated and is in the contracted state positioned at the above-described installation state detection position, and the object to be heated detection switch 10 is turned off.
In addition, although the said expansion-contraction mechanism 9 is provided in the said small burner 1b similarly to each of the standard burner 1a high-heat-power burner 1c, the to-be-heated object detection switch 10 is not provided.

  As shown in FIG. 2, the temperature sensor 11 is provided in the upper end part of the up-and-down movable part 9b of the expansion-contraction mechanism 9 corresponding to each of the standard burner 1a, the small burner 1b, and the high thermal power burner 1c. The temperature sensor 11 is configured to detect the temperature of the object to be heated while the bottom of the object to be heated is in contact with the upper end of the vertically movable portion 9b. Although not shown, the grill unit 3 is provided with a temperature sensor that detects the temperature in the grill.

  The gas supply configuration to the standard burner 1a, the small burner 1b, the high thermal power burner 1c, and the grill burner 2 will be described. As shown in FIG. 2, an original gas electromagnetic valve 13 is provided in the original gas supply path 12, The main gas supply path 12 is branched into four systems: a standard burner branch path 14a, a small burner branch path 14b, a high-heat-power burner branch path 14c, and a grill burner branch path 14d, and the grill burner branch to the grill burner 2 is branched. The path 14d further branches into a branch path for the upper surface burner and a branch path for the lower surface burner, and each of the branch paths has a flow path 15 with an orifice of and a bypass path 17 provided with an open / close solenoid valve 16. Is provided. In each of the standard burner branch path 14a, the small burner branch path 14b, the high thermal power burner branch path 14c, and the grill burner branch path 14d, the amount of gas is adjusted to adjust the combustion amount (thermal power) of each burner. ) Is provided.

  On the front side of the gas stove, an ignition command state for instructing an ignition command for the burners 1a, 1b, 1c and a fire extinguishing command for the burners 1a, 1b, 1c corresponding to the standard burner 1a, the small burner 1b, and the high thermal power burner 1c, respectively. A point-extinguishing command unit 28 that can be switched to a fire-extinguishing command state for commanding, a manually operated combustion amount adjusting operation unit 29 for commanding adjustment of the combustion amount (thermal power) of the burners 1a, 1b, and 1c, and cooking settings Is provided, and a setting input panel 60 is provided for instructing the grill burner 2 to perform ignition, extinguishing, and thermal power adjustment. The setting input panel 50 and the setting input panel 60 are openable, and the setting input panel 60 is provided with a point fire switch 61 (see FIG. 4) for instructing the grill burner 2 to ignite and extinguish. . Although not shown in the setting input panel 50, for example, for automatically adjusting the combustion amount (thermal power) of the burner so that the temperature of the heated object becomes a preset temperature, such as the temperature of tempura oil. A setting switch for automatic cooking for setting the automatic cooking mode is provided.

  Although not described in detail, the point fire extinguishing command unit 28 is provided with a cylindrical rotation operation unit 31 that can be held and retracted at each position between the push-in position and the protruding position, and provided inside when switched to the protruding position. The fire extinguisher switch 32 (see FIG. 2) is turned on to command ignition, and when switched to the push-in position, the fire extinguishing switch 32 is turned off to command fire extinguishing. Further, the combustion amount adjustment operation unit 29 is configured to adjust the change in the burner combustion amount by rotating the rotation operation unit 31 at the protruding position. Incidentally, each of the standard burner 1a and the high thermal power burner 1c is configured so that its combustion amount can be adjusted to a five-stage set combustion amount, and the small burner 1c has its combustion amount set to a three-stage set combustion amount. It is configured to be adjustable.

  Then, the operation control unit H ignites corresponding ones of the burners 1a, 1b, 1c, and 2 based on the ignition command of the point fire extinguishing switches 32 and 61, and based on the fire extinguishing command of the point fire extinguishing switches 32 and 61. The operation of each of the burners 1a, 1b, 1c and 2 is controlled so as to extinguish the corresponding burner, and the operation of the flow rate control valve 18 is adjusted so as to adjust the fuel supply amount based on the command of the combustion amount adjusting operation unit 29. It is configured to control.

  Further, as shown in FIG. 2, a speaker 37 is provided as a notifying means for notifying various information by voice, and the operation control unit H is configured to notify the various information by the speaker 37. .

  Therefore, in this embodiment, each of the standard burner 1a and the high thermal power burner 1c corresponds to the heating means A, and the point fire extinguishing switch 32 corresponds to the heating command means. Combustion control that starts the heating operation of the heating unit A by the heating start command by the switch 32 and stops the heating operation of the heating unit A by the heating stop command by the point extinguishing switch 32, and detection information of the mounting state detection unit D The heating control means 100 which performs the heating control for cooking which controls the heating action of the heating means A based on is comprised.

  And it is discriminate | determined whether the heating control means 100 is the mounting detection state at the time of a heating start by which the mounting state detection part D detects a mounting state, when the heating start command by the point fire extinguishing switch 32 is commanded. In the state where the mounting state is detected by the mounting state detection unit D, the heating start is used as an indicator for determining the mounting state progress that appears irregularly with the passage of time. When the integrated value Nx of the number of times that the number of times determined to be in the time-of-placement detection state is integrated and the number of times of determination to be in the placement detection state at the start of heating becomes equal to or greater than the set number Ns as the abnormality determination reference value It is configured to execute abnormality countermeasure processing. Then, the integrated value Nx of the number of times determined to be the mounting detection state at the start of heating is written and stored in the nonvolatile memory Me as the storage means, and the information can be retained even if the power supply is stopped. ing. The nonvolatile memory Me is configured using, for example, an EEPROM.

  Further, in this stove, when the power-on condition is satisfied by the command of the point fire switch 32, power is supplied to the heating control means 100, and when the power-off condition is satisfied by the command of the point fire switch 32, the heating control means 100 is supplied. The power supply control means PK which interrupts | blocks supply of the electric power to is provided.

Next, a specific configuration of the power control unit PK will be described.
As shown in FIG. 4, an intermittent switching circuit 41 that can be switched between a power supply state for supplying power from the power source 40 to the operation control unit H and a cutoff state for cutting off the power supply is provided. When at least one of the four point fire-extinguishing switches 32, 61 including the three point-extinguishing switches 32 for each stove burner and the one point fire-extinguishing switch 61 for the grill burner 2 is turned on, the power-on condition is satisfied. As a result, the power supply state is switched from the cut-off state.

  The intermittent switching circuit 41 includes a switching transistor 42 that intermittently connects a power supply line from the power source 40 to the operation control unit H, and a drive circuit 43 that switches the switching transistor 42 between an on state and an off state. Even in a state where the operation control unit H is not supplied with power and is not operating, when any of the point fire extinguishing switches 32 and 61 is turned on, that is, when a heating start command is instructed, the switching transistor 42 is switched to a conductive state. It is the structure which switches to the state which supplies electric power to the operation control part H.

And the operation information of each point fire extinguishing switch 32 and 61 is also input into the operation control part H, and the operation control part H is the switching transistor 42 until all the four point fire extinguishing switches 32 and 61 turn off. Is configured to output a power holding signal to the drive circuit 43 so as to maintain the conductive state. That is, when all of the four point fire extinguishing switches 32 and 61 are turned off, that is, when the heating control command is instructed, the operation control unit H stops outputting the power holding signal because the power-off condition is satisfied. It is.
Accordingly, the power management means 101 that manages the power supply state using the operation control unit H is configured, and the power management means 101 and the intermittent switching circuit 41 constitute the power control means PK.

  The stove is provided with a power-off state monitoring device. The power-off state monitoring device switches from a state where the power supply control means PK supplies power to the heating control means 100 to a state where the supply of power is cut off. When the mounting state detection unit D sometimes detects the mounting state, it is set to a state for outputting a mounting state output, and then the power control unit PK supplies power to the heating control unit 100. In the period until switching to the state, if the placement state detection unit D continues to detect the placement state, the state of outputting the placement state output is maintained, and the placement state detection unit D is not mounted. A change state detection circuit 45 that switches to a state in which a non-mounting state output is output when the mounting state is detected is provided. The heating control means 100 is configured to be able to read the output of the change state detection circuit 45 when the power supply is switched from the state where the power supply is cut off to the state where the power is supplied.

  In other words, the change state detection circuit 45 includes a capacitor 46 capable of storing and discharging electric charge, and a capacitor in a state where power is supplied to the heating control means 100 and the heated object detection switch 10 is in a non-conductive state. If the object to be heated detection switch 10 maintains the non-conductive state after the electric charge is accumulated in 46 and the state where the electric power is supplied to the heating control means 100 is switched to the state where the electric power supply is cut off. The state in which the charge is accumulated in the capacitor 46 is maintained, and the charge accumulated in the capacitor 46 is discharged when the to-be-heated object detection switch 10 is switched from the non-conductive state to the conductive state. The voltage between the terminals of the capacitor 46 when it is stored is output as the output for the above-mentioned setting state, and the capacitor 46 after the electric charge is discharged And a charging and discharging circuit JH for outputting a child voltage as the output for non-placed state is constructed.

Next, a specific configuration of the change state detection circuit 45 will be described.
FIG. 5 shows a change state detection circuit 45 for the placement state detection unit D in the standard burner 1a. Hereinafter, the change state detection circuit 45 will be described. In addition, although the same circuit is provided also about the mounting state detection part D in the high thermal power burner 1c, description is abbreviate | omitted here.

  A terminal on one side of the heated object detection switch 10 in the placement state detection unit D is connected to the grounding part, and a terminal on the other side of the heated object detection switch 10 is connected to a terminal on one side of the capacitor 46. The other terminal of the capacitor 46 is connected to the grounding portion, and the connection point where the other terminal of the heated object detection switch 10 and the one terminal of the capacitor 46 are connected is connected via the charge detection switch 47. It is connected to a detection input terminal b in the operation control unit H. The charge detection switch 47 is configured using a switching element such as a transistor that becomes conductive when an operation command is output from the command output terminal c of the operation control unit H.

Further, a diode 48 is connected between a connection point where the other terminal of the heated object detection switch 10 and one terminal of the capacitor 46 are connected to the charging output terminal a of the operation control unit H. Thus, while the power is supplied to the operation control unit H, the charging output terminal a is in an output state, and the capacitor 46 is charged through the diode 48 and the resistors 49a and 49b. Furthermore, it connected in series between the connection location where the other-side terminal of the object to be heated detection switch 10 and the one-side terminal of the capacitor 46 are connected, and the connection location between the diode 48 and the resistor 49a. Two inverter circuits 51 and 52 and a diode 53 are connected in series. The inverter circuits 51 and 52 are always supplied with power, and power is supplied even while power supply to the operation control unit H is interrupted. The inverter circuits 51 and 52 are constituted by using CMOS type ICs that consume very little power. Incidentally, the consumption current of the inverter circuits 51 and 52 is, for example, 1 μA or less. Note that one buffer circuit may be used in place of the two inverter circuits.
The diode 48, the resistors 49a and 49b, the inverter circuits 51 and 52, the diode 53, and the like constitute a charge / discharge circuit JH.

Next, the operation of the change state detection circuit 45 will be described.
In a state where electric power is supplied to the operation control unit H and an object to be heated is placed on the Gotoku 6, the output terminal for charging of the operation control unit H is in an output state, and the capacitor 46 passes through the diode 48 and the resistors 49a and 49b. Is charged. When the power supply to the operation control unit H is stopped, the charging output terminal a is in the output stop state, but the capacitor 46 has no circuit for discharging the charged charge even in the output stop state. Therefore, the charged state will be maintained. In addition, at this time, the input of the first inverter circuit 51 becomes high level and the output becomes low level, and the input of the second inverter circuit 52 becomes low level and the output becomes high level. Since the capacitor 46 is charged by the output current of the inverter circuit 52, the capacitor 46 is maintained in a charged state without being lost in a short time due to spontaneous discharge.

  Therefore, when the mounting state detection unit D detects the mounting state when switching from the state of supplying power to the operation control unit H constituting the heating control unit 100 to the state of cutting off the supply of power, The capacitor 46 has already been charged, and is set to output a voltage between terminals of the capacitor 46 when the charge is stored in the capacitor 46 as a mounting state output.

  If the state where the object to be heated is placed on Gotoku 6 in a state where the power supply to the operation control unit H is stopped in this way, electric charges are accumulated in the capacitor 46 and one terminal of the capacitor 46 is connected. Will maintain a high level state.

  When the object to be heated is lifted from the five virtues 6 and the object to be heated detection switch 10 is turned on while the power supply to the operation control unit H is stopped, the electric charge accumulated in the capacitor 46 is reduced. It is discharged through the heated object detection switch 10. When the heated object detection switch 10 is turned on in this way, the input side of the first inverter circuit 51 becomes low level and its output becomes high level, and the input side of the second inverter circuit 52 becomes high level. Since the output becomes low level, charging of the capacitor 46 by the inverter circuit 52 is also stopped. As a result, the terminal on one side of the capacitor 46 maintains a low level state.

  Then, when the power supply is started, the operation control unit H commands the operation command from the command output terminal c and switches the charge detection switch 47 to the conductive state, whereby the capacitor 46 is detected at the detection input terminal b. Is detected, that is, the voltage across the capacitor 46 is detected. At this time, if the potential of one terminal of the capacitor 46 is high level, the heated object detection switch 10 is maintained in the off state (mounted state), and the potential of one terminal of the capacitor 46 is low level. If so, it can be determined that the heated object detection switch 10 is switched to the on state (non-mounted state) in the state where the power supply to the operation control unit H is stopped.

  Note that the operation control unit H detects the level of the terminal on one side of the capacitor 46 for each set unit time while the power is being supplied, so that the heated object detection switch 10 is turned on (not mounted). It is detected whether it is in the mounting state) or in the off state (mounting state).

Next, the control of the operation control unit H will be described.
The control according to the present invention is executed for the standard burner 1a and the high thermal power burner 1c. However, the control operation of the operation control unit H for the standard burner 1a and the high thermal power burner 1c is performed. Therefore, in the following description, the control operation for the standard burner 1a will be described, and the description of the control operation for the high thermal power burner 1c will be omitted.
The original gas solenoid valve 13 is opened when the point fire switch 32 corresponding to at least one of the standard burner 1a, the small burner 1b, the high thermal power burner 1c and the grill burner 2 is in the ON state. When all of the point fire extinguishing switches 32 corresponding to the 1a, the small burner 1b, the high thermal power burner 1c, and the grill burner 2 are in the OFF state, the valve is maintained in the closed state. A description of the control is omitted.

The control operation of the operation control unit H will be described below based on the flowcharts shown in FIGS.
When power is supplied from the power source 40, the operation control unit H outputs a power holding signal for holding the power-on state to the intermittent switching circuit 41 (step 1). Then, an operation command is commanded from the command output terminal c to switch the charge detection switch 47 to the conducting state, and the potential of one terminal of the capacitor 46 at the detection input terminal b, that is, between the terminals of the capacitor 46. By detecting the voltage, a change state of the object to be heated detection switch 10 is detected in a state where the power supply to the operation control unit H is stopped (step 2). That is, if the potential of the terminal on one side of the capacitor 46 is high level, it is determined that the heated object detection switch 10 is maintained in the off state (mounting state) until then, and the one side of the capacitor 46 is If the potential of the terminal is at a low level, the heated object detection switch 10 is kept in the ON state (non-mounted state) or is heated in the state where the power supply to the operation control unit H is stopped. It can be determined that the object detection switch 10 has been switched from the off state (mounting state) to the on state (non-mounting state).

  And the electric potential of the one terminal of the capacitor | condenser 46 is a low level, and the to-be-heated object detection switch 10 is maintaining the ON state (non-mounting state), or the electric power supply to the operation control part H stops When it is determined that the heated object detection switch 10 is switched from the off state (placed state) to the on state (non-placed state) in the state where the heated object is detected, the counter count value Nx as described later is reset to zero. (Steps 3 and 4), the potential of the terminal on one side of the capacitor 46 is at a high level, and the heated object detection switch 10 is maintained in the OFF state (mounted state). If it is determined that the state to be detected is maintained, the process proceeds to the next step without resetting the count value Nx.

  Next, if the count value Nx integrated by the counter is not equal to or greater than the set number of times Ns (for example, 10 times), if the placement state is detected by the placement state detection unit D at this time (this state is (Corresponding to the placement detection state at the start of heating), the count value of the counter is counted up (steps 5, 6, and 7), and when the placement state detection unit D detects the non-placement state, The count value Nx is reset to zero (step 8). The count value Nx of this counter corresponds to the integrated value of the number of times that it has been determined that the heating start placement detection state.

  In step 5, if the count value Nx integrated by the counter is equal to or greater than the set number of times Ns, the speaker 37 is notified of failure information by sound such as “failure has occurred” and the standard burner 1a is notified. The corresponding front thermal power display unit 36 and the top thermal power display unit 71 are similarly blinked to perform notification processing for notifying that an abnormality has occurred, and in this state, no operation according to the command of the fire extinguishing switch 32 is accepted. A state is reached (steps 9 and 10). That is, the processes of steps 9 and 10 correspond to the abnormality countermeasure process.

  Next, combustion control is executed (step 11). In this combustion control, as shown in FIG. 7, if there is an ignition command for the standard burner 1a, the flow control valve 18 is opened and a drive signal is given to the spark plug 7 to cause the ignition operation. Ignition processing for igniting is performed (steps 71 and 72). If the automatic cooking mode is not set, the opening degree of the flow control valve 18 is adjusted so that the combustion amount of the standard burner 1a becomes the combustion amount according to the command of the combustion amount adjustment operation unit 29 (step 73- 1, 73-2) When the automatic cooking mode is set, the opening degree of the flow control valve 18 is set so that the temperature of the heated object detected by the temperature sensor 11 becomes a preset temperature. Is automatically adjusted to the amount of combustion (thermal power) of the standard burner 1a (step 73-3). If there is a fire extinguishing command, fire extinguishing processing is executed (steps 74 and 79).

  When the placement state detection unit D detects a state where there is no object to be heated (non-placement state) during the combustion operation, the count value Nx of the counter is reset to zero, and the combustion amount of the standard burner 1a is set to 5 The opening degree of the flow control valve 18 is adjusted so that the combustion amount in the absence corresponding to the heating power one stage higher than the lowest heating power of the stage is adjusted, and the front heating power display corresponding to the standard burner 1a is displayed. By flashing similarly the part 36 and the top | upper surface thermal-power display part 71, it is alert | reported that it is an abnormal state that the standard burner 1a is burning in the state in which the to-be-heated material is not mounted in Gotoku 6 (step). 75, 75-1, 76, 77).

  In addition, the combustion amount of the standard burner 1a is not present until the elapsed time after the placement state detection unit D detects the state of no object to be heated (non-placement state) reaches the absence determination time. In the meantime, when the mounted state detection unit D detects that there is an object to be heated, the state is reduced to the original heating power and the combustion state is continued (step 75). , 73-1 to 74), if the placement state detection unit D detects a state where there is no object to be heated (non-placement state) even after the non-existence determination time has elapsed, a fire extinguishing process is executed ( Step 79). The process of adjusting the heating power based on the detection result of the placement state detection unit D corresponds to cooking heating control.

  When all the fire extinguishing switches 32 and 61 are turned off, the output of the power holding signal for holding the power-on state output to the intermittent switching circuit 41 is stopped, and the intermittent switching circuit 41 is switched to the cutoff state. To turn off the power (steps 12 and 13).

  According to such a configuration, all the fire extinguishing switches 32 and 61 are turned off and the power-off condition is satisfied with the heated object detection switch 10 detecting the on state, and the operation control unit H is turned on. When the heated object detection switch 10 in the placement state detection unit D is switched from the on state to the off state even once after being in the off state, the potential at one terminal of the capacitor 46 is changed from the high level as described above. Since it changes to the low level, no matter what state the heated object detection switch 10 is in when the power is supplied to the operation control unit H by turning on the fire extinguishing switch 32, the counter in the process of step 4 Will be reset to zero.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
This second embodiment is the same as the first embodiment except that the configuration of the change state detection circuit is different. Therefore, only the different configuration will be described, and the description of the same configuration will be omitted.

  In the second embodiment, the object to be heated detection switch is configured such that the input voltage input to the input section is different between when the change state detection circuit 45 is in the non-conductive state and when in the conductive state. 10 is connected to the input unit, and when the input voltage corresponding to the non-conducting state is input to the input unit, the first output voltage as the output for the device state is output, and the input unit When the input voltage corresponding to the non-conducting state switches from the input voltage corresponding to the non-conducting state to the input voltage corresponding to the conducting state, the second output voltage as the non-mounting state output different from the first output voltage The output holding circuit SH is configured to hold the second output voltage until the reset process is performed after switching to the output state.

Next, a specific configuration of the change state detection circuit 45 will be described.
As shown in FIG. 8, two NAND circuits 54a and 54b are provided, and an output terminal of the first NAND circuit 54a and one input terminal (hereinafter referred to as input terminal B) of the second NAND circuit 54b are connected to each other. In the circuit 54b, two input terminals are connected via a resistor 55, and an input terminal (hereinafter referred to as an input terminal A) opposite to the side to which the output terminal of the first NAND circuit 54a is connected is connected among the two input terminals. ) And the grounding part is connected to the heated object detection switch 10. Therefore, the input terminal A constitutes the input unit.

  One input terminal (hereinafter referred to as input terminal C) of the first NAND circuit 54a is connected to the output terminal of the second NAND circuit 54b, and the other input terminal (hereinafter referred to as input terminal D) of the first NAND circuit 54a. The output unit of an output switching circuit 57 that switches the transistor 56 in accordance with the signal of the switching signal output terminal b of the operation control unit H and outputs a high level signal or a low level signal is connected. The output terminal (input terminal C) of the second NAND circuit 54b is connected to the detection input terminal a of the operation control unit H.

  The change state detection circuit 45 is configured such that power is always supplied from the power source 40 through a power line provided separately from the power supply line to the operation control unit H, and power is supplied to the operation control unit H. Even in a state in which it is not supplied, it is possible to detect a change in the state of the placement state detection unit D and hold the state. Each NAND circuit 54a, 54b uses a CMOS type IC, and the current consumption is, for example, about 1 μA to several μA, which is very small.

Next, the operation of the change state detection circuit 45 will be described.
In the state where the intermittent switching circuit 41 is switched to the power supply state and power is supplied to the operation control unit H, and the operation control unit H outputs a high level switching signal from the switching signal output terminal b, the output switching circuit 57. The output section, that is, the input terminal D becomes low level. At that time, the output terminal of the first NAND circuit 54a, in other words, the input terminal B becomes high level. If the heated object detection switch 10 is in the ON state in this state, the input terminal A is at the low level, so that the output of the second NAND circuit 54b is at the high level. On the other hand, if the object to be heated detection switch 10 is in the OFF state, the input terminal A is at the high level, so the output of the second NAND circuit 54b is at the low level.

  That is, in a state where electric power is supplied to the operation control unit H and the operation control unit H outputs a high-level switching signal from the switching signal output terminal b, depending on the difference in the detection state of the heated object detection switch 10. Thus, the output of the second NAND circuit 54b changes, and whether the detection state of the placement state detection unit D is the placement state or the non-placement state depending on the state of the detection input terminal a of the operation control unit H. Can be determined.

  If the power supply to the operation control unit H is cut off while the heated object detection switch 10 is detecting the off state (mounting state), then the input terminal A and the input terminal B are both at the high level. The output of the second NAND circuit 54b is at a low level, the power supply to the operation control unit H is cut off, the output of the switching signal from the switching signal output terminal b is stopped, and the input terminal D changes to the high level. However, since both the input terminal A and the input terminal B maintain the high level, the output of the second NAND circuit 54b maintains the low level.

  And if the to-be-heated object detection switch 10 switches from an OFF state (mounting state) to an ON state (non-mounting state) in the state where the power supply to the operation control unit H is cut off, the input terminal A is Since the output of the second NAND circuit 54b, that is, the input terminal C is switched to the high level, both the input terminal C and the input terminal D become the high level, and the output of the first NAND circuit 54a, that is, the input terminal B is set to the low level. Become a level. As described above, once the input terminal B becomes low level, power is supplied to the operation control unit H until a high level switching signal is output from the switching signal output terminal b and reset processing is performed. Regardless of the state change of the heated object detection switch 10, the output of the second NAND circuit 54b, that is, the input terminal C is maintained at the high level.

That is, after the power supply to the operation control unit H is cut off, the output of the second NAND circuit 54b is maintained at a low level if the heated object detection switch 10 continues to be in the OFF state, and the operation control unit When the heated object detection switch 10 is switched from the OFF state to the ON state even once after the power supply to H is cut off, the output of the second NAND circuit 54b is switched to the high level, and thereafter, the switching signal is switched to the high level. Thus, the output of the second NAND circuit 54b is maintained at the high level until the reset process is performed.
Accordingly, the first NAND circuit 54a, the second NAND 54b, the resistor 55, and the like constitute an output holding circuit SH.

Next, the control operation of the operation control unit H will be described with reference to FIG.
When the power supply is started, the operation control unit H maintains the switching signal output from the switching signal output terminal b at a low level (step 2-1), and outputs the output of the second NAND circuit 54b to the detection input terminal a. After the power supply to the operation control unit H is cut off based on the detection result at that time, the heated object detection switch 10 continues to be in the OFF state or is switched from the ON state to the ON state. It is determined whether the detection state of the heated object detection switch 10 has changed (step 2-2). When it is determined that the detection state of the heated object detection switch 10 has changed, the count value Nx of the counter is reset to zero (steps 3-1 and 4), and the detection state of the heated object detection switch 10 changes. If not, the switching signal output from the switching signal output terminal b is switched to the high level without resetting, and the output holding circuit SH is reset (step 3-2). Therefore, after that, the output of the second NAND circuit 54b changes according to the difference in the detection state of the heated object detection switch 10, and the placement state detection unit depends on the state of the detection input terminal a of the operation control unit H. It becomes a state where it can be determined whether the detection state of D is the placement state or the non-placement state. The processing after step 5 is the same as that in the first embodiment.

FIG. 9 is a time chart showing the state change of each input terminal.
In Nos. 1 to 5, when the heated object detection switch 10 is always on (non-mounted state), Nos. 7 to 12 are turned off and the heated object detection switch 10 is turned on (non No. 14 to 18 when the object to be heated detection switch 10 always maintains the off state (mounting state) No. 20 to No. 14 to 18 when the state is switched from the mounting state) to the off state (mounting state). No. 27 to 33 are to-be-heated object detection switches when the power is turned off and the heated object detection switch 10 is switched from the off state (placed state) to the on-state (non-placed state). When No. 10 is switched from the on state (non-mounting state) to the off state (mounting state) and then switched to the on state (non-mounting state) again, Nos. 35 to 41 are heated in the power-off state. The detection switch 10 is once turned on from the off state (mounted state). (Non-placed state) in switched off again state shows a case where switching to (mounted state). In FIG. 9, “1” indicates that the input terminal is at a high level, and “0” indicates that the input terminal is at a low level.

  In FIG. 9, power is supplied to the heating control means 100 in a state where the time charts shown in Nos. 20 to 25 and Nos. 35 to 41 detect the mounting state. This shows a case where the mounting state detection unit D switches from a state in which the mounting state is detected to a state in which a non-mounting state is detected after the power supply is switched to a state in which power supply is cut off. . As can be seen from this figure, if the switching signal output from the switching signal output terminal b is maintained at the low level, the output of the second NAND circuit 54b is maintained at the high level.

  Therefore, after all the fire extinguishing switches 32 and 61 are turned off and the power-off condition is satisfied and the operation control unit H is turned off with the heated object detection switch 10 detecting the off state. When the heated object detection switch 10 in the placement state detection unit D is switched from the off state to the on state even once, the output of the second NAND circuit 54b maintains the high level. The integrated value Nx of the counter is reset to zero by the process in step 4 regardless of the state of the object to be heated detection switch 10 when power is supplied to the operation control unit H by the ON operation. Become.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
In the third embodiment, the configuration of the heating control unit is the same as that of the first embodiment except that only the different configuration is described, and the description of the same configuration is omitted.

  In the third embodiment, the heating control means is used as an indicator for determining the state of placement that appears regularly with time in the state in which the placement state is detected by the placement state detection means. The abnormality countermeasure processing is performed when the time during which the placement state is detected by the previous placement state detection means is integrated, and when the integrated value of the time reaches a set time for abnormality determination as a reference value for abnormality determination Is configured to run.

  Hereinafter, the control operation of the operation control unit H will be described. As shown in FIG. 11, when power is supplied from the power source 40, a power holding signal for holding the power-on state is output to the intermittent switching circuit 41 ( Step 21), detecting the change state of the heated object detection switch 10 in a state where the power supply to the operation control unit H is stopped, and determining that the detected state of the heated object detection switch 10 is changed, The integrated value Tk of the time when the mounting state is detected by the mounting state detection unit D integrated by the timer is reset to zero (steps 22, 23, 24). Then, if the placement state is detected by the placement state detection unit D, the time during which the placement state is detected by the placement state detection unit D is accumulated by a timer (steps 25 and 26). If the non-mounting state is detected by the state detector D, the time integration value Tk is reset to zero (step 27).

  When the integrated value Tk of the time when the mounting state is detected by the mounting state detector D integrated by the timer reaches the abnormality determination set time Ts, the abnormality countermeasure processing similar to that of the first embodiment is executed. (Steps 28, 32, 33). If the integrated value Tk has not reached the abnormality determination set time Ts, the same combustion control as in the first embodiment is executed (step 29), and all the point fire extinguishing switches 32, 61 are turned off. Switching to the power-off state (steps 30 and 31).

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) A configuration or a self-holding circuit that enables the heating control means to detect a change from the placement state of the placement state detection means to the non-placement state as the change state detection circuit based on a difference in accumulated charge in the capacitor. It is not limited to the configuration that enables the heating control means to detect the change in the output of the output, but the loading state detection means changes from the loading state to the non-loading state in a state where power is not supplied to the heating control means. Even if the output changes and the detection state of the mounting state detection means changes thereafter, the configuration is not limited to the above configuration, and various configurations can be used as long as the configuration can be maintained.

(2) In the above-described embodiment, the heating control means is in the placement detection state at the start of heating as an indicator for placement state progress determination that appears regularly or irregularly with the passage of time. The number of discriminating times and the time during which the previous placement state is detected are integrated. Instead of such a configuration, the burner combustion amount and the like in the state where the previous placement state is detected are integrated. You may make it do.

(3) In the above embodiment, the heating control means reads the output of the change state detection circuit when the power supply is switched from the cut-off state to the power-supply state, and detects the installation state described above. When the means detects the non-placement state, the integrated value of the placement state progress determination index is reset as a predetermined process. However, the present invention is not limited to such a configuration, and the following configuration is provided. It may be a thing.
For example, the heating control means is configured to perform an automatic rice cooking process that automatically stops heating after heating with a preset heating pattern after cooking as the heating control for cooking, and the automatic rice cooking process ends. Then, after the power supply to the heating control means is stopped, when the execution of the automatic rice cooking process is instructed again, the change state detection circuit outputs the non-mounting state output. If the heated object that has been cooked is properly removed from the five virtues, no notification will be given, but if the output for the above-mentioned setting state is being output, the heated object that has been cooked will be placed. Since there is a possibility that the heating process is performed again in the placed state, a notification process for notifying that the rice cooking process has been completed may be executed as the predetermined process. Further, instead of such processing, various processing can be performed according to the output of the change state detection circuit.

(4) In the above embodiment, as the abnormality countermeasure processing, the notification processing for notifying that there is an abnormality and the processing for not accepting the operation by the command of the fire extinguishing switch are performed. For example, a notification process for prompting an operation to lift the fire extinguisher may be performed, and after that, if a non-mounting state is not detected even after a set time has elapsed, a process of not accepting an operation based on a command from the fire extinguishing switch may be performed.

(5) In the above-described embodiment, the placement state detection unit includes the vertical movable unit and the object to be heated detection switch. For example, a magnet that is distributed and arranged on both lateral sides of the vertical movable unit. And a reed switch, or a reflective or transmissive optical sensor or the like.

Perspective view of stove Block diagram showing stove control configuration Vertical section of the stove near the burner The figure which shows the electric power supply structure to the operation control part H The figure which shows the circuit structure of a mounting state detection part. The figure which shows the flowchart of control action The figure which shows the flowchart of control action The figure which shows the circuit structure of a mounting state detection part. Timing chart showing operating status The figure which shows the flowchart of control action The figure which shows the flowchart of control action

Explanation of symbols

6 Placement part 10 Heated object detection switch 32 Heating command means 40 Power supply 45 Change state detection circuit 46 Capacitor 100 Heating control means A Heating means D Placement state detection means JH Charging / discharging circuit PK Power supply control means SH Output holding circuit

Claims (6)

Placement that detects whether the object to be heated is placed on the placement part on which the object to be heated heated by the heating means is placed or is not placed. State detection means;
Combustion control that starts the heating operation of the heating unit by a heating start command by the heating command unit and stops the heating operation of the heating unit by a heating stop command by the heating command unit, and detection information of the placement state detection unit Heating control means for executing cooking heating control for controlling the heating operation of the heating means based on
When the power-on condition is satisfied by the heating start command of the heating command means, power is supplied from the power source to the heating control means, and when the power-off condition is satisfied by the heating stop command of the heating command means, the power is supplied to the heating control means. A power-off state monitoring device in a heating cooker provided with a power supply control means for cutting off the supply of power,
When the placement state detection means detects the placement state when the power supply control means switches from a state where power is supplied to the heating control means to a state where power supply is cut off, the placement state The above-mentioned installation state detection means detects the above-mentioned installation state until the power supply control means is switched to a state in which power is supplied to the heating control means. If the above described state is maintained, the state for outputting the above-mentioned placement state output is maintained, and when the above-described placement state detection means detects the above-mentioned non-placement state, the change state detection is switched to the state for outputting the non-placement state output. A circuit is provided,
When the heating control unit is switched from a state where power supply is cut off to a state where power is supplied, the power-off state in the heating cooker configured to be able to read the output of the change state detection circuit Monitoring device. The placement state detection means includes a heated object detection switch that is in a non-conduction state if the placement state is described above and in a conduction state if the placement state is not,
The change state detection circuit is
A capacitor capable of storing and discharging electric charge;
When power is supplied to the heating control means and the heated object detection switch is in a non-conductive state, electric charge is accumulated in the capacitor, and power supply is cut off from a state where power is supplied to the heating control means. If the heated object detection switch is maintained in a non-conductive state after switching to a state in which the heated object is detected, the capacitor accumulates electric charge, and the heated object detection switch becomes conductive from the non-conductive state. When the state is switched, the electric charge accumulated in the capacitor is discharged, and the voltage between the terminals of the capacitor when the electric charge is accumulated in the capacitor is output as the above-described output for the arrangement state. The charging / discharging circuit which outputs the voltage between the terminals of the said capacitor | condenser after discharging as said output for non-mounting states, The addition of Claim 1 is comprised. Power supply switching state monitoring device in cooker. The placement state detection means includes a heated object detection switch that is in a non-conduction state if the placement state is described above and in a conduction state if the placement state is not,
The change state detection circuit is
The heated object detection switch is connected to the input unit in a form in which the input voltages input to the input unit are different between the non-conductive state and the conductive state, and the input unit includes the input voltage When the input voltage corresponding to the non-conducting state is input, the first output voltage is output as the output for the above described state, and the voltage input to the input unit is determined from the input voltage corresponding to the non-conducting state. When switching to the input voltage corresponding to the conductive state, the second output voltage is switched to a state in which the second output voltage as the non-mounting state output different from the first output voltage is output, and the second processing is performed until reset processing is performed. The monitoring apparatus for the power-off state in the heating cooking appliance of Claim 1 comprised with the output holding circuit which hold | maintains an output voltage. The heating control means
In the state in which the previous placement state is detected by the previous placement state detection means, an indicator for determining the placement state progress that appears regularly or irregularly with the passage of time is integrated and the integrated value is obtained. The integrated value calculation process for resetting the integrated value is executed when the non-mounted state is detected by the obtained mounting state detecting means, and the integrated value integrated in the integrated value calculating process is used for abnormality determination. It is configured to execute abnormality countermeasure processing when the reference value is reached, and
When it is determined that the output for the non-mounting state is output in the change state detection circuit when the power supply is switched from the blocked state to the state where the power is supplied, The monitoring apparatus for the power-off state in the heating cooker of any one of Claims 1-3 comprised so that the integrated value of the parameter | index for progress determination may be reset. The heating control means
It is configured to determine whether or not it is a heating start placement detection state in which the previous placement state is detected by the previous placement state detection means when a heating start command is commanded by the heating command means, and , The number of times determined to be the placement detection state at the start of heating is integrated as an index for determining the progress of the placement state, and the integrated value of the number of times determined to be the placement detection state at the start of heating is The monitoring apparatus for power-off states in a heating cooker according to claim 4, wherein the abnormality countermeasure process is executed when the number of times set as the abnormality determination reference value is exceeded. The heating control means
The time of the state where the previous placement state is detected by the previous placement state detection means is integrated as an index for the previous placement state determination, and the integrated value of the time is used as the reference value for abnormality determination. The monitoring apparatus for the power-off state in the heating cooker according to claim 4, wherein the abnormality countermeasure process is executed when the abnormality determination set time is reached.

Images