JP5423315B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker used for a general kitchen or business use.

  In recent years, this type of cooking device, particularly induction cooking devices, has been recognized and has been widely used because of its excellent features of safety, cleanliness, and high efficiency. And there exists what improved the operativity at the time of cooking by providing the capacitance-type touch key in the top plate which comprises the upper surface of an apparatus (for example, refer patent document 1).

  In addition to mechanical switches such as rocker switches (seesaw switches), push switches, and tact switches, switches for turning on / off the main power supply of the device may be realized by the capacitive touch keys.

JP 2007-40657 A

  However, when the switch for turning on / off the main power supply of the device is configured with a capacitive touch key in the conventional configuration, if the on / off detection of this switch is performed with a single component (IC), the main power supply of the device is turned off. If the single component (IC) malfunctions such as runaway during turning on and heating, there is no way to turn off the main power of the device and stop heating.

  In addition, if this switch ON / OFF detection is always performed with a plurality of components (IC), even if one component (IC) malfunctions while the main power of the device is turned on and heated, the other component (IC) ) Makes it possible to turn off the main power of the equipment and stop heating, but the power consumption (standby power) when the main power is turned off and the equipment is not in use is as large as driving multiple components (IC). It had the problem of becoming.

  An object of the present invention is to solve the above-described conventional problems, and to configure a switch for turning on and off a main power supply of an apparatus with a capacitive touch key, and to improve safety and reduce standby power. And

In order to solve the above-described conventional problems, the cooking device of the present invention converts a capacitance that changes when a finger touches a power switch, which is a touch key composed of electrodes provided on a top plate, into a voltage change. Power switch converting means for outputting, and first power switch detecting means for detecting whether or not a finger is touching the power switch by inputting a voltage change output from the power switch converting means in a high input impedance state And a second power switch detection means, and a power on state when detecting that a finger touches the power switch based on signals input from the first power switch detection means and the second power switch detection means. Power on / off detecting means for alternately switching the power off state, the power switch converting means, the first power switch detecting means, and the second power switch In a configuration including a switch detection unit and a drive power circuit serving as a drive power source for the power on / off detection unit, the drive power circuit converts the power switch conversion unit, the first power switch detection unit, and the power on / off detection unit. The power on / off detection means does not supply power from the drive power supply circuit to the second power switch detection means when the power is off, and the first power switch detection means When it is detected that a finger touches the power switch, the power supply is switched from a power-off state to a power-on state, and when the power is on, power is supplied from the drive power supply circuit to the second power switch detection means, Either the power switch detection means or the second power switch detection means detects that a finger touches the power switch. That when is obtained to switch from the power-on state to the power-off state.

  Thereby, when the power is on, both the first power switch detection means and the second power switch detection are operated to detect that the finger is touching the power switch, and when the power is off, Only the first power switch detection means is operated to reduce the power consumption of the second power switch detection means.

  When the cooking device of the present invention is in the power-on state, even if either one of the first power switch detection means and the second power switch detection malfunctions (runaway), the other can switch to the power-off state. In the power-off state, the power consumption of the second power switch detection means can be reduced to reduce the power consumption (standby power) when the device is not used.

The block diagram of the heating cooker in Embodiment 1 of this invention The block diagram of the other heating cooker in Embodiment 1 of this invention

  A first invention is a power switch for turning on and off a main power source, comprising heating means for heating a pan, a top plate provided on the top of the heating means, and a capacitive touch key provided on the top plate. And a power switch conversion means for converting a capacitance changing by touching the power switch to a voltage change and outputting the voltage change, and a voltage change output from the power switch conversion means in a high input impedance state. From the first power switch detection means and the second power switch detection means for detecting whether or not a finger is touching the power switch, the first power switch detection means and the second power switch detection means Power on / off detection that switches between the power on state and the power off state when it detects that a finger touches the power switch based on the input signal And a drive power supply circuit as a drive power supply to the power switch conversion means, the first power switch detection means, the second power switch detection means, and the power on / off detection means. A power supply is always supplied from the circuit to the power switch conversion means, the first power switch detection means, and the power on / off detection means, and the power on / off detection means from the drive power supply circuit when the power is off. When the first power switch detection means detects that the power switch is touched by operating the first power switch detection means without supplying power to the second power switch detection means, the power is turned off. When the power is on, the power is supplied from the drive power circuit to the second power switch detection means. And the first power switch detection means and the second power switch detection means are operated together, and either the first power switch detection means or the second power switch detection means is the power switch. By detecting that the finger is touching, the power switch conversion means converts the capacitance that changes when the finger touches the power switch into a voltage change and outputs it. The first power switch detection means and the second power switch detection means input a voltage change output from the power switch conversion means in a state where the input impedance is high, and detect whether or not a finger touches the power switch. Therefore, the first power switch detection means and the second power switch detection means interfere with each other even when one of them malfunctions (runaway). Therefore, it is possible to detect whether or not a finger touches the power switch based on a voltage change input from the power switch conversion means.

  The power on / off detection means supplies power from the drive power supply circuit to the first power switch detection means and the second power switch detection means when the power is on, and the first power switch detection means and the second power switch detection means When the power switch detection means is operated together and either the first power switch detection means or the second power switch detection means detects that the power switch is touched, it switches from the power-on state to the power-off state. Even if one of the first power switch detection means and the second power switch detection means malfunctions (runaway), the other can detect that the power switch is touched and switch to the power-off state. it can.

  Further, the power on / off detecting means operates the first power switch detecting means to operate the first power switch without supplying power from the drive power supply circuit to the second power switch detecting means in the power off state. When the detection means detects that a finger touches the power switch, the power supply is switched from the power-off state to the power-on state. Therefore, when the finger touches the power switch, the power-on state is switched and the power consumption of the second power switch detection means is reduced. Power consumption (standby power) when not using the equipment can be reduced.

  According to a second aspect of the present invention, in the first aspect of the invention, the power supply connection opening / closing means for mechanically opening and closing the connection between the commercial power source and the heating means is provided, and when the power supply connection opening / closing means is on, When the heating means is connected and the power supply connection opening / closing means is off, the commercial power supply and the heating means are opened, and the power supply connection opening / closing means is turned on / off in association with the power on / off state of the power on / off detection means. In the control structure, when the power on / off detection means is in a power off state, the power connection opening / closing means is turned off, and the first power switch detection means detects that a finger touches the power switch, and Even if the power on / off detecting means switches from the power off state to the power on state, the power connection opening / closing means is kept off, and then the first power switch detecting means and the When both of the two power switch detection means detect that the finger touching the power switch has been released, the power on / off detection means is turned on by turning on the power connection opening / closing means. In the unlikely event that the first power switch detection means malfunctions (runaway) and the finger is touching the power switch, the power connection open / close means remains off even if the power switch is switched from the power-off state to the power-on state. Since the connection between the commercial power source and the heating means is released, the heating means can be prevented from being energized and safety can be further improved.

3rd invention is the instruction | indication regarding the output of the heating means which heats a pan, the top plate provided in the upper part of the said heating means, the power switch provided in the said top plate for turning on and off the main power supply, and the said heating means A plurality of capacitive touch keys including a switch for performing power, a power switch conversion means for converting a capacitance changed by a finger touching the power switch to a voltage change, and a high input impedance state A first power switch detecting means for detecting whether or not a finger is touching the power switch by inputting a voltage change output from the power switch converting means; and a power switch converting means having a high input impedance. A switch that detects whether or not a finger is touching the power switch by inputting a voltage change to be output, and that instructs to output the heating means. A power / heating switch detecting means for detecting whether or not a finger is touching a switch for giving an instruction relating to the output of the heating means based on a change in capacitance of the heating means, and for changing and outputting a setting relating to the output of the heating means; Heating control means for controlling the output of the heating means based on a signal input from the power / heating switch detection means; and the power supply based on signals input from the first power switch detection means and the power / heating switch detection means. When it is detected that a finger touches the switch, a power on / off detecting means for alternately switching between a power on state and a power off state, the power switch converting means, the first power switch detecting means, and the power / heating switch detecting means In the configuration provided with a drive power supply circuit as a drive power supply to the heating control means and the power on / off detection means The drive power supply circuit constantly supplies power to the power switch conversion means, the first power switch detection means, and the power on / off detection means. When the power on / off detection means is in a power off state, the drive power supply The first power switch detection means operates the first power switch detection means without supplying power from the circuit to the power supply / heating switch detection means and the heating control means, and the first power switch detection means touches the power switch. Is switched from the power-off state to the power-on state, and when the power is on, power is supplied from the drive power circuit to the power / heating switch detection means and the heating control means, and the first power switch The first power switch detection means or the first power switch detection means or the power / heating switch detection means are operated together. When any of the power / heating switch detection means detects that the finger is touching the power switch, the power on state is switched from the power on state to the power off state. Can improve reliability and reduce power consumption (standby power) when the power is turned off, and when the power on / off detection means is in the power on state, the power / heating switch detection means uses the first power supply. As a backup of the switch detection means, it detects whether or not the finger is touching the power switch, manages settings related to the output of the heating means, and based on a signal input from the power supply / heating switch detection means by the heating control means, Since the output is controlled, it is related to switching from power-on to power-off with few means such as a single component (IC). And improve-reliability, it is possible to achieve both the realization of output existence or varying function of the heating means.

  According to a fourth aspect of the invention, in particular, in the third aspect of the invention, the power supply connection opening / closing means for mechanically opening and closing the connection between the commercial power supply and the heating means is provided, and when the power supply connection opening / closing means is on, When the heating means is connected and the power supply connection opening / closing means is off, the commercial power supply and the heating means are opened, and the power supply connection opening / closing means is turned on / off in association with the power on / off state of the power on / off detection means. In the control structure, when the power on / off detection means is in a power off state, the power connection opening / closing means is turned off, and the first power switch detection means detects that a finger touches the power switch, and Even if the power on / off detecting means switches from the power off state to the power on state, the power connection opening / closing means is kept off, and then the first power switch detecting means and the When both the source / heating switch detection means detect that the finger touching the power switch has been released, the power on / off detection means is turned on by turning on the power connection opening / closing means. In the unlikely event that the first power switch detection means malfunctions (runaway) and the finger is touching the power switch, the power connection open / close means remains off even if the power switch is switched from the power-off state to the power-on state. Since the connection between the commercial power source and the heating means is released, the heating means can be prevented from being energized and safety can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a block diagram of a heating cooker according to Embodiment 1 of the present invention.

  As shown in FIG. 1, in the heating cooker according to the present embodiment, the heating unit 2 includes a power supply relay 2a and a heating unit 2b, and the heating unit 2b includes an inverter circuit 2c, a heating coil 2d, It is comprised by the heating control means 2e. Then, the heating control means 2e turns on the power supply relay 2a, connects the commercial power supply 1 and the inverter circuit 2c, controls the inverter circuit 2c, applies a high frequency current of several tens kHz to the heating coil 2d, and heats The pot 3 that is magnetically coupled to the coil 2d is induction-heated.

  Further, the upper surface of the device is covered with the top plate 4, and the pan 3 is installed at a position facing the heating coil 2 d via the top plate 4 and heated.

  Further, a power switch 5 and a heating instruction switch 6 are respectively provided on the lower surface of the top plate 4 in a capacitive touch key configuration, and the heating instruction switch 6 alternately turns on and off the output of the heating means 2b. A heating off / on key 6a for switching to an up key 6b, an up key 6b for increasing the output amount of the heating means 2b, and a down key 6c for decreasing the output amount of the heating means 2b. The power switch 5 is operated when the main power is turned on / off, and the heating instruction switch 6 is operated when switching the output on / off of the heating means 2b or changing the output amount of the heating means 2b.

  Moreover, the power switch conversion means 7 is caused by a person operating the device (connected to the ground as an equivalent capacitor) touching the power switch 5 with a finger, and thus between the electrode of the power switch 5 and the ground potential. The change in capacitance is converted into a change in DC voltage and output.

  The first power switch detection means 8 and the second power switch detection means 9 each have an input impedance higher than 1 MΩ through the voltage follower of the operational amplifier, and malfunction itself (runaway) and the input terminal is short-circuited. In the state where the voltage of the input source is not affected, the change of the DC voltage output from the power switch conversion means 7 is input, the on / off of the power switch 5 is detected, and the H is related to the on / off of the power switch 5. / L DC signal is output.

  When the power on / off detection means 10 receives the H signal (the DC signal) from the first power switch detection means 8 and the second power switch detection means 9, the person operating the device turns the power switch 5 with a finger. Detects touching and alternately switches between power-on and power-off states, and can identify three states: power-on (power switch = on), power-on (power switch = off), and power-off Output a signal.

  The heating switch detection means 12 detects that the capacitance between the electrode of the heating instruction switch 6 and the ground potential changes due to the person operating the device touching the heating instruction switch 6 with a finger. Then, the on / off of the heating instruction switch 6 is detected, and the settings relating to the output on / off and the output amount of the heating means 2b are changed.

  The drive power supply circuit 11 uses the commercial power supply 1 as an input source, generates a predetermined DC voltage, and supplies a power relay 2a, a heating control means 2e, a power switch conversion means 7, a first power switch detection means 8, a first power switch detection means 8, 2 are output as driving power sources for the power switch detection unit 9, the power on / off detection unit 10, and the heating switch detection unit 12.

  In addition, the heating control means 2e and the heating switch detection means 12 have, as operation modes, a power-off mode indicating a power-off state, an initial mode in which output of the heating means 2b is turned off in the power-on state, There are three modes, the heating mode in which the heating means 2b is turned on with any one of the ten set thermal powers up to the thermal power “10”. When the drive power is supplied from the drive power circuit 11, the power is first turned off. Start operation in mode. The heating switch detection means 12 changes the operation mode based on signals input from the heating instruction switch 6 and the power on / off detection means 10, and the heating control means 2 e operates based on the signal input from the heating switch detection means 12. To change.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

When the commercial power supply 1 is connected to the device for the first time, the drive power supply 11 supplies power to the power switch conversion means 7, the first power switch detection means 8, and the power on / off detection means 10. The power on / off detection means 10 is in a power off state indicating main power off, and outputs a signal indicating the power off state. Then, the drive power supply circuit 11 detects that the power supply is off based on a signal input from the power on / off detection means 10, and does not supply power to the power relay 2a, the heating control means 2e, and the heating switch detection means 12. maintain. Since the power relay 2a, the heating control means 2e, and the heating switch detection means 12 cannot operate without being supplied with driving power, the operation mode cannot be changed by the heating instruction switch 6 inevitably, and the power relay 2a The contact is turned off.

  Thereafter, when a person who uses the device touches the power switch 5 with his / her finger, the power switch conversion means 7 converts the capacitance that changes when the finger touches the power switch 5 into a change in DC voltage and outputs it. The first power switch detection means 8 detects the ON state of the power switch 5 based on the signal input from the power switch conversion means 7 and outputs an H signal, and the power on / off detection means 10 detects the first power switch detection. The H signal is input from the means 8 to detect that the power switch 5 is turned on, and the power-off state indicating the main power-off is switched to the power-on state indicating the main power-on to change the power-on state (power switch = on). The signal shown is output.

  The drive power supply circuit 11 detects that the power is on based on a signal indicating the power on state (power switch = on) input from the power on / off detection means 10, and detects the heating control means 2e and the heating switch detection. The driving power is supplied to the means 12, but the driving power is not supplied to the power relay 2a, and the contact of the power relay 2a remains off.

  Thereafter, when a person using the device touches the power switch 5 with his / her finger and recognizes that the power-off state has been switched to the power-on state, and removes the touched finger from the power switch 5, the power switch conversion means 7 The capacitance changing when the finger is removed from the power switch 5 is converted into a DC voltage change and output, and the first power switch detection means 8 and the second power switch detection means 9 are power switch conversion means. 7 detects an off state of the power switch 5 based on a signal input from the power source 7 and outputs an L signal. The power on / off detecting means 10 outputs a L signal from both the first power switch detecting means 8 and the second power switch detecting means 9. When a signal is input, the power switch 5 is detected to be turned off, and a signal indicating a power-on state (power switch = off) is output.

  Then, the drive power supply circuit 11 detects that the finger touching the power switch 5 has been released based on a signal indicating the power-on state (power switch = off) input from the power-on / off detection means 10, and the power relay 2a The driving power is supplied to the power relay 2a so that the contact of the power relay 2a can be turned on.

  The heating switch detection means 12 starts operating in the power-off mode, and then detects that the power is on (power switch = off) based on the signal input from the power-on / off detection means 10, Is changed from the power-off mode to the initial mode, and a signal indicating the initial mode is output to the heating control means 2e.

  The heating control means 2e starts operating in the power-off mode, maintains the contact-off of the power relay 2a, and then changes the operation mode from the power-off mode to the initial mode based on the signal input from the heating switch detection means 12. And the contact of the power supply relay 2a is turned on.

  With the above configuration, the power on / off detection means 10 erroneously detects that the first power switch detection means 8 malfunctions (runaway) and the finger is touching the power switch 5 when the power is off. Even when the power supply is switched from the off state to the power on state, the contact of the power supply relay 2a can be maintained to open the connection between the commercial power source 1 and the heating means 2b, thereby preventing the heating means 2b from being energized.

Thereafter, when the person who uses the device touches the heating off / on key 6a with his / her finger, the heating switch detecting means 12 detects that the heating off / on key 6a is turned on, and sets the operation mode / set thermal power to the initial mode. The heating control means 2e is changed from the heating mode to the heating power “6”.
Based on the input signal, the operation mode / set thermal power is changed from the initial mode to the heating mode / thermal power “6”, and the inverter circuit 2 c is controlled so that the output of the heating means 2 b becomes 1000 W.

  At this time, when the person using the device touches the up key 6b with his / her finger, the set fire power can be increased by one step up to the heating power “10”, and by touching the down key 6c with his / her finger, the thermal power is increased. The set thermal power can be decreased by one step with “1” as the lower limit.

  That is, when a person using the device touches the up key 6b with a finger, the heating switch detection means 12 detects the on-key of the up key 6b and sets the set thermal power from the thermal power “6” to the thermal power “7” in one step. The heating control means 2e changes the set heating power from the heating power “6” to the heating power “7” based on the signal input from the heating switch detection means 8 so that the output of the heating means 2b becomes 1450 W. The inverter circuit 2c is controlled.

  When a person using the device touches the down key 6c with his / her finger, the heating switch detection means 12 detects that the down key 6c is turned on and changes the set thermal power from the thermal power “6” to the thermal power “5” in one step. The heating control means 2e changes the set heating power from the heating power “6” to the heating power “5” based on the signal input from the heating switch detection means 12 so that the output of the heating means 2b becomes 800 W. The inverter circuit 2c is controlled.

  Further, when the operation mode of the device is the initial mode or the heating mode, when a person using the device touches the power switch 5 with a finger, the power switch conversion means 7 changes by touching the power switch 5 with the finger. The first power switch detection means 8 and the second power switch detection means 9 convert the capacitance to be converted into a change in DC voltage, and the first power switch detection means 8 and the second power switch detection means 9 The power supply on / off detection means 10 receives the H signal from at least one of the first power supply switch detection means 8 and the second power supply switch detection means 9 to detect the on state and outputs the H signal. Is switched from the power-on state indicating main power-on to the power-off state indicating main power-off, and a signal indicating the power-off state is output.

  The heating switch detection means 12 detects that the power is off based on a signal input from the power on / off detection means 10, changes the operation mode from the initial mode or the heating mode to the power off mode, and also performs a heating instruction. Based on the signal input from the heating switch detection unit 12, the heating control unit 2e changes the operation mode from the initial mode or the heating mode to the power-off mode, and turns off the heating unit 2b. At the same time, the contact of the power supply relay 2a is turned off.

  Further, the drive power supply circuit 11 detects that the power supply is off based on a signal input from the power supply on / off detection means 10, and immediately cuts off the supply of drive power to the power supply relay 2a to contact the power supply relay 2a. Is turned off, and the supply of drive power to the heating control means 2e and the heating switch detection means 12 is shut off immediately or after the temperature inside the device or the temperature of the top plate 4 at the place where the pan 3 is installed is lowered.

  With the above configuration, each of the first power switch detection means 8 and the second power switch detection means 9 has an input impedance higher than 1 MΩ via the voltage follower of the operational amplifier and malfunctions itself (runaway), and the input terminal is Since a change in the DC voltage output from the power switch conversion means 7 is input in a state that does not affect the voltage of the input source even if it is short-circuited, it does not interfere with each other even when one of them malfunctions (runaway). The on / off state of the power switch 5 can be detected based on the change in the DC voltage input from the power switch conversion means 7.

  If a person using the device touches the power switch 5 with a finger when the power is on, either the first power switch detection means 8 or the second power switch detection means 9 malfunctions (runaway). Even if the power switch 5 cannot be detected, the power switch 5 is detected on the other side, and the power on / off detection means 10 switches from the power on state to the power off state, thereby improving the reliability regarding the main power off. can do.

  Further, when the power is off, the second power switch detection means 9 is not operated, and only the first power switch detection means 8 detects that the power switch 5 is on, and the device is in a standby state. Electric power (standby power) can be reduced.

  In FIG. 1, the second power switch detection means 9 that detects whether or not a finger is touching the power switch 5 as a backup of the first power switch detection means 8 when the power is on, and a heating instruction Although the heating switch detection means 12 for changing the setting relating to the output of the heating means 2b based on the signal input from the switch 6 is constituted by a separate means, as shown in FIG. 2, the second power switch detection means By integrating the function of 9 and the function of the heating switch detection means 12 into the power supply / heating switch detection means 13, the power supply can be switched from the power-on state with a small number of constituent means such as a single component (IC). It is possible to achieve both improvement in reliability related to switching to the off state and reduction in power consumption (standby power) of the device in the power off state.

  1 and 2, the heating control means 2e controls the ON / OFF of the contact of the power relay 2a. However, when the power ON / OFF detection means 10 is in the power OFF state and the power ON state (power switch = ON). Can turn off the contact of the power supply relay 2a and turn on the contact of the power supply relay 2a when the power is on (power switch = off).

  The drive power supply 11 is single and has a plurality of outputs, but a plurality of single outputs or a combination of these may be used.

  Furthermore, although the heating means 2b is described as a means for inductively heating the pan 3, the same effect can be obtained as long as it is a means for heating the pan such as a radiant heater, a halogen heater, or a sheathed heater.

  As described above, the heating cooker according to the present invention improves the reliability related to switching from main power on to off and can reduce the power consumption (standby power) of the equipment when the main power is off. The present invention can also be applied to a single cooking device using a means for heating, a halogen heater, a halogen heater, a sheathed heater, or a combination cooking device.

DESCRIPTION OF SYMBOLS 1 Commercial power supply 2a Power supply relay 2b Heating means 2e Heating control means 3 Pan 4 Top plate 5 Power switch 6 Heating instruction switch 7 Power switch conversion means 8 1st power switch detection means 9 2nd power switch detection means 10 Power supply on / off detection Means 11 Drive power supply circuit 12 Heating switch detection means 13 Power supply / heating switch detection means

Claims (4)

A heating switch for heating the pan, a top plate provided on the heating means, a capacitive touch key provided on the top plate, a power switch for turning on and off the main power, and the power switch A power switch converting means for converting a capacitance changed by touching a finger into a voltage change and outputting the voltage change, and a voltage change output from the power switch converting means in a state of a high input impedance is inputted to the power switch. Based on signals input from the first power switch detection means and the second power switch detection means, and the first power switch detection means and second power switch detection means for detecting whether or not A power on / off detecting means for alternately switching between a power on state and a power off state when detecting that a finger touches the power switch; In the configuration including a drive power supply circuit as a drive power to the switch conversion means, the first power switch detection means, the second power switch detection means, and the power on / off detection means, the power switch from the drive power circuit The power supply is always supplied to the conversion means, the first power switch detection means, and the power on / off detection means. The power on / off detection means is configured to supply the second power switch from the drive power supply circuit when the power is off. When the first power switch detection means is operated without supplying power to the detection means and the first power switch detection means detects that the finger is touching the power switch, the power supply is turned off from the power-off state. When the power is on, power is supplied from the drive power supply circuit to the second power switch detection means, The power switch detection means and the second power switch detection means are operated together, and either the first power switch detection means or the second power switch detection means is touching the power switch. A cooking device that switches from the power-on state to the power-off state when detected. Power supply connection opening / closing means for mechanically opening and closing the connection between the commercial power supply and the heating means is provided, and when the power supply connection opening / closing means is on, the commercial power supply and the heating means are connected, and the power supply connection opening / closing means is off. In this case, the commercial power supply and the heating means are opened, and the power on / off detecting means is controlled to be turned off in association with the power on / off state of the power on / off detecting means. When the state is in the state, the power connection opening / closing means is turned off, the first power switch detection means detects that the finger is touching the power switch, and the power on / off detection means changes from the power off state to the power on state. Even after switching, the power connection opening / closing means is kept off, and thereafter both the first power switch detection means and the second power switch detection means are When detecting that the source had been touched switch fingers apart, the heating cooker according to claim 1 which is adapted to turn on the power supply connection opening and closing means. A plurality of heating means for heating the pan, a top plate provided on the heating means, a power switch for turning on and off a main power supply provided on the top plate, and a switch for giving an instruction regarding the output of the heating means Of the capacitance type touch key, the power switch converting means for converting the capacitance changing when the finger touches the power switch into a voltage change and outputting the voltage change, and the power switch converting means in a high input impedance state. A first power switch detection means for detecting whether or not a finger is touching the power switch by inputting a voltage change to be output, and a voltage change output from the power switch conversion means in a high input impedance state Detecting whether or not a finger touches the power switch, and giving an instruction regarding the output of the heating means. A power / heating switch detecting means for detecting whether or not a finger touches a switch for giving an instruction relating to the output of the heating means based on the change, and changing and setting a setting relating to the output of the heating means; and the power / heating switch A heating control means for controlling the output of the heating means based on a signal input from the detection means, and a finger touches the power switch based on signals input from the first power switch detection means and the power / heating switch detection means. Power on / off detecting means for alternately switching between a power on state and a power off state, the power switch converting means, the first power switch detecting means, the power / heating switch detecting means, and the heating control means. And a drive power supply circuit as a drive power supply to the power on / off detection means, the drive power supply A power supply is always supplied from the road to the power switch conversion means, the first power switch detection means, and the power on / off detection means, and the power on / off detection means from the drive power circuit when the power is off. When power is not supplied to the power / heating switch detection means and the heating control means, the first power switch detection means is operated, and the first power switch detection means is touching the power switch. When detected, the power supply is switched from the power-off state to the power-on state. When the power is on, power is supplied from the drive power supply circuit to the power / heating switch detection means and the heating control means, and the first power switch detection means and The power / heating switch detection means is operated together to provide the first power switch detection means or the power / heating switch. A cooking device configured to switch from a power-on state to a power-off state when any of the touch detection means detects that a finger touches the power switch. Power supply connection opening / closing means for mechanically opening and closing the connection between the commercial power supply and the heating means is provided, and when the power supply connection opening / closing means is on, the commercial power supply and the heating means are connected, and the power supply connection opening / closing means is off. In this case, the commercial power supply and the heating means are opened, and the power on / off detecting means is controlled to be turned off in association with the power on / off state of the power on / off detecting means. When the state is in the state, the power connection opening / closing means is turned off, the first power switch detection means detects that the finger is touching the power switch, and the power on / off detection means changes from the power off state to the power on state. Even after switching, the power connection opening / closing means is kept off, and thereafter both the first power switch detection means and the power / heating switch detection means are When detecting that the source had been touched switch fingers apart, the heating cooker according to claim 3 which is adapted to turn on the power supply connection opening and closing means.

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