JP5262971B2 - Cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To constitute both of a main power supply switch and a switch for instructing heating by a capacitance type touch key so as to improve safety or reduce standby electric power. <P>SOLUTION: A power supply switch detection means 7 for detecting the on/off state of the power supply switch 5 which is the capacitance type touch key and alternately switching to the power supply on state and the power supply off state, and a heating switch detection means 8 for detecting the on/off state of the heating instruction switch 6 which is the capacitance type touch key and changing setting related to output of a heating means 2b, are constituted by different components and separated from each other. Thus, even when either one malfunctions (runs away), heating is stopped by the other, so as to improve the safety. In the power supply off state, only the power supply switch detection means 7 is operated, so as to reduce standby electric power. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

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 capacitive touch key in the top plate which hits 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, the switches for turning on and off the main power supply of the device can be realized with the capacitive touch keys. is there.

JP 2007-40657 A

  However, in the conventional configuration, both the switch for turning on and off the main power source of the cooking device and the switch for instructing on / off of heating and the amount of heating are configured by capacitive touch keys, and these switches When on / off detection is performed with the same component (IC), there is no way to stop heating when the component (IC) malfunctions, such as runaway, or because the component (IC) has a relatively high function. The current consumption is relatively large, and there is a problem that the power consumption (standby power) when the main power supply is turned off and the device is not used becomes large.

  The present invention solves the above-described conventional problems, and a switch for turning on / off the main power supply of the device and a switch for instructing on / off of heating and a heating amount are both configured by a capacitive touch key, and is safe. An object of the present invention is to provide a cooking device that can improve the performance or reduce standby power.

In order to solve the above-described conventional problems, a heating cooker of the present invention includes a power relay that opens and closes a connection between a heating unit and a power source that serves as an input source, a drive power supply circuit that supplies a drive power for the power relay, A plurality of capacitive touch keys provided on the top plate, each of which includes a power switch for turning on and off the main power supply and a switch for instructing an output of the heating means, and a power on state by detecting on and off of the power switch. A configuration comprising power switch detection means for alternately switching the power off state, and heating switch detection means for detecting an on / off state of a switch for instructing the output of the heating means and changing a setting relating to the output of the heating means in the said power switch detection means, together with separated configuration by the heat switch detecting means and the different parts, the power switch When the detection means is in a power-on state, the drive power circuit supplies power to the power relay so that the contact of the power relay can be closed, and when the power switch detection means is in a power-off state, the drive power circuit The power supply to the power supply relay is cut off and the contact of the power supply relay is opened .

  As a result, even if one of the power switch detection means and the heating switch detection means malfunctions (runaway), the other means can be operated. Further, when the power is off, only the power switch detection means is used. The driven standby state can be set.

The heating cooker according to the present invention can improve the safety of the equipment by stopping heating on the other side even if either one of the power switch detection means and the heat switch detection means malfunctions (runaway), and the main power is turned off. In some cases, only the power switch detection means is driven, and the power consumption (standby power) when equipment is not in use is reduced by adopting relatively low current consumption parts (IC) for the power switch detection means. can do.

The block diagram of the heating cooker in Embodiment 1 of this invention The block diagram of the heating cooker in Embodiment 2 of this invention The block diagram which integrated the heating switch detection means into two sets of the heating parts of the other heating cooker in Embodiment 2 of this invention. The block diagram which integrated the heating control means of the two sets of heating parts of the other heating cooker in Embodiment 2 of this invention into one. The block diagram of the heating cooker in Embodiment 3 of this invention

The first invention includes a heating means for heating the pan, a power supply relay for opening and closing a connection between the heating means and a power source serving as an input source, a drive power supply circuit for supplying drive power for the power supply relay, and the heating means A plurality of capacitive touch keys including a top plate provided on the top, a power switch for turning on and off the main power supply provided on the top plate, and a switch for instructing output on / off and output amount of the heating means And a power switch detection means for detecting on / off of the power switch to alternately switch between a power on state and a power off state, and an on / off state of a switch for instructing output on / off and output amount of the heating means. a heat switch detecting means for changing the output settings oFF and the output quantity of the heating means, a signal input from said heating switch detection means In the configuration that includes a heating control means for controlling the output OFF and output amount of said heating means based, and the power switch detection means, together with separated configuration by the heat switch detecting means and the different parts, the power switch detection When the means is in a power-on state, the drive power circuit supplies power to the power relay and contacts the power relay
If the power switch detection means is in a power-off state, the drive power circuit cuts off the power supply to the power relay and opens the contact of the power relay. If either one of the power switch detection means or the heating switch detection means malfunctions (runaway), the other can be operated. If the heating switch detection means malfunctions (runaway), operate the power switch to operate the heating means. If the power switch detection means malfunctions (runaway), the heating means can be turned off by operating the switch that gives instructions regarding the output of the heating means, improving the safety of the equipment. can do.

A second invention is, in particular, the power switch detection means in the first invention, outputs a pulse signal at a predetermined period, the heating switch detection means, the power switch longer period the pulse than the predetermined period from the detection means detecting an abnormality in the signal is not input by outputting a signal to said heating control means to output turn off the heating means, the heating switch detection means, based on the pulse signal input from the power switch detection means Detecting whether the power switch detection means is operating normally, and detecting that the power switch detection means is not operating normally, output a signal to the heating control means to turn off the heating means, The safety of the device can be further improved.

A third invention is, in particular, the heating means of the second aspect of the invention an input source commercial power, the power switch detection means detects the off of the power switch at a predetermined period, and detects the on-off of the power switch by associating with the timing of outputting the pulse signal, the heating switch detection means, based on the pulse signal input from the power switch detection means, in addition to whether or not the detected power switch detection means is operating normally Thus, the power switch detection means can know when to turn on / off the power switch, and when the heating means outputs, it is superimposed on the signal of the power switch, and its level depends on the amplitude of the commercial power supply The degree of correction for such noise can be adjusted.

A fourth invention is, in particular, the driving power source circuit of the first to third invention, the commercial power supply as an input source, in addition to the power relay, said power switch detection means and the heating switch detection means and said heating control means a driving power source for supplying the constantly driving power supplied to the power switch detection means, based on a signal input from the power switch detection means, said heating control if the power-on state and the heating switch detection means When a predetermined condition is satisfied after the drive power is supplied to the means and the power supply is changed from the power-on state to the power-off state, the main power supply is not supplied to the heating switch detection means and the heating control means. When it is off, the drive power supply detects that the power is off based on the signal input from the power switch detection means, and only the power switch detection means supplies the drive power. Power consumption when equipment is not in use by adopting parts (IC) with relatively low current consumption for the power switch detection means without supplying drive power to the heat switch detection means and heating control means (Standby power) can be reduced.

A fifth invention is, in particular, a plurality in the fourth invention, the one of the combination of the power switch and the power switch detection means, a combination comprising a switch for instruction relating to the output of said heating means and at least the heating means When the one or a plurality of heating control means, one of said heating switch detection means for detecting the on-off switch for instructing relating to the output of said plurality of heating means or for controlling the output of said plurality of heating means wherein the power supply driving circuit, the power supply always driving power is supplied to the switch detection means, based on a signal input from the power switch detection means, said one or more heating switch detection means in the case of power-on state And a drive power supply to the one or more heating control means, and after changing from a power-on state to a power-off state, a predetermined In the case where the condition is satisfied, the main power supply is not supplied to the one or more heating switch detection means and the one or more heating control means, even in a configuration including a plurality of heating units. When it is off, the drive power supply detects that the power supply is off based on the signal input from the power switch detection means, supplies only the power switch detection means, and does not supply drive power to all other components. In this way, power consumption (standby power) when the device is not used can be reduced by adopting a component (IC) with relatively low current consumption for the power switch detection means.

A sixth invention is particularly, in the invention of the fourth or fifth, the heating means as an input source to commercial power, and includes a zero voltage detection means for outputting a signal indicating a near zero voltage point of the commercial power source, the power switch detection means, by associating the power-off state or from the driving power supply circuit, the supply of the drive power to the heating switch detection means, a connection between the commercial power and the zero-voltage detecting means, said commercial power source If not connected to the zero-voltage detection means detects the off of the power switch at a predetermined period and, when connecting the zero-voltage detection means and the commercial power based on a signal input from the zero-voltage detection means and the An on / off of the power switch is detected in the vicinity of a zero voltage point of a commercial power source, and the heating switch detecting means is based on a signal input from the zero voltage detecting means. When the power is on, the power switch detection means connects the commercial power supply and the zero voltage detection means, and detects the zero voltage On / off of the power switch is detected near the zero voltage point of the commercial power supply based on the signal input from the detection means, and the heating switch detection means is detected near the zero voltage point of the commercial power supply based on the signal input from the zero voltage detection means. Since the on / off state of the switch for instructing the output of the heating means is detected, when the heating means is outputting, it is superimposed on the signal of the switch for instructing the output of the power switch or the heating means, and its level is commercial The degree of influence on noise that depends on the amplitude of the power supply can be kept low.

  When the power supply is off or when the drive power supply circuit does not supply drive power to the heating switch detection means, the power switch detection means should not connect the commercial power supply and the zero voltage detection means, and the power switch is turned on and off at a predetermined cycle. Therefore, it is possible to reduce the power consumed by the zero voltage detecting means and further reduce the power consumption (standby power) when the device is not used.

  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 the first embodiment of the present invention.

  In FIG. 1, the heating unit 2 is composed of a power supply relay 2a and a heating means 2b, and the heating means 2b is composed of an inverter circuit 2c, a heating coil 2d, and a 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 capacitance type touch key configuration.

  Further, the heating instruction switch 6 includes a heating off / on key 6a for alternately switching on and off the output of the heating means 2b, 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. It consists of

  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.

  Further, the power switch detection means 7 changes in the capacitance between the electrode constituting the power switch 5 and the ground potential due to the person operating the cooking device touching the power switch 5 with a finger. , The on / off state of the power switch 5 is detected, the power on state and the power off state are alternately switched, and the H / L DC signal is driven in accordance with the power on state / power off state. 9 and the heating switch detection means 8.

  The heating switch detection means 8 is caused by a change in the capacitance between the electrode constituting the heating instruction switch 6 and the ground potential due to the person operating the cooking device touching the heating instruction switch 6 with a finger. Detecting this, the on / off state of the heating instruction switch 6 is detected, and the settings relating to the output on / off of the heating means 2b and the output amount are changed.

  The power switch detection means 7 and the heating switch detection means 8 are each composed of an IC such as a different microcomputer (hereinafter referred to as a microcomputer for short).

  The drive power supply circuit 9 uses the commercial power supply 1 as an input source, generates a predetermined DC voltage, and serves as a drive power supply for the power supply relay 2a, the heating control means 2e, the power switch detection means 7, and the heating switch detection means 8. Output.

  In addition, the heating control means 2e and the heating switch detection means 7 are, as operation modes, a power-off mode indicating a power-off state, an initial mode in which the heating means 2b is turned off in the power-on state, and heating power “1” to 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 9, the power is first turned off. Start operation in mode.

  The heating switch detection means 8 changes the operation mode based on the signals input from the heating instruction switch 6 and the power switch detection means 7, and the heating control means 2e is a signal input from the heating switch detection means 8. The operation mode is changed based on

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

  First, in a state where the commercial power source 1 is connected to the heating cooker for the first time, the power switch detection means 7 is in a power off state indicating the main power off, and an L signal which is a signal indicating the power off state is supplied to the drive power circuit 9. Output.

  Then, the drive power supply circuit 9 supplies drive power only to the power switch detection means 7 and detects that the power supply is off based on the signal input from the power switch detection means 7, and the power supply relay 2a, No drive power is supplied to the heating control means 2e and the heating switch detection means 8.

  Since the power relay 2a, the heating control means 2e, and the heating switch detection means 8 cannot operate without being supplied with driving power, the operation mode cannot be changed by the heating instruction switch 6 inevitably. The contact is turned off.

  Thereafter, when a person using the heating cooker touches the power switch 5 with a finger, the power switch detection means 7 detects the power switch 5 being turned on, and from the power off state indicating the main power off, the main power on Is switched to the power-on state, and the H signal, which is a signal indicating the power-on state, is output to the drive power supply circuit 9 and the heating switch detection means 8.

  The drive power supply circuit 9 detects that the power is on based on the signal input from the power switch detection means 7, and in addition to the power switch detection means 7, the power supply relay 2a and the heating control means 2e. , And the heating switch detection means 8 is also supplied with drive power.

  The heating switch detection means 8 starts to operate in the power off mode, and then detects that the power is on based on the signal input from the power switch detection means 7 and changes the operation mode from the power off mode. The mode is changed 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 state based on the signal input from the heating switch detection means 8. The mode is changed and the contact of the power relay 2a is turned on.

  Thereafter, when a person using the heating cooker touches the heating off / on key 6a with a finger, the heating switch detection means 8 detects that the heating off / on key 6a is turned on, and changes the operation mode from the initial mode. The heating mode is changed to the heating power “6”, and the heating control means 2e changes the operation mode from the initial mode to the heating mode based on the signal input from the heating switch detection means 8, and the setting heating power is “6”. And the inverter circuit 2c is controlled so that the output of the heating means 2b becomes 1000W.

  At this time, the person using the heating cooker can increase the set thermal power by one step up to the heating power “10” by touching the up key 6b with a finger, and touch the down key 6c with the finger. Thus, the set thermal power can be decreased step by step with the thermal power “1” as the lower limit.

That is, when a person using the heating cooker touches the up key 6b with his / her finger, the heating switch detection means 8 detects that the up key 6b is turned on and changes the set thermal power from the thermal power “6” to the thermal power “7”. 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, and the output of the heating means 2b is 1450 W. The inverter circuit 2c is controlled so that

  When a person using the cooking device touches the down key 6c with his / her finger, the heating switch detection means 8 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”. 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 8, and the output of the heating means 2b is 800 W. The inverter circuit 2c is controlled so that

  Furthermore, when the operation mode of the cooking device is the initial mode or the heating mode, when a person using the cooking device touches the power switch 5 with a finger, the power switch detection means 7 turns on the power switch 5. It detects and switches from a power-on state to a power-off state, and outputs an L signal that is a signal indicating the power-off state.

  The heating switch detecting means 8 detects that the power is off based on the signal input from the power switch detecting means 7 and changes the operation mode from the initial mode or the heating mode to the power off mode. The on detection of the heating instruction switch 6 is invalidated.

  Furthermore, the heating control unit 2e changes the operation mode from the initial mode or the heating mode to the power-off mode based on the signal input from the heating switch detection unit 8, turns off the heating unit 2b, and supplies the power relay 2a. Turn off the contact.

  Further, the drive power supply circuit 9 detects that the power supply is off based on the signal input from the power switch detection means 7, and immediately cuts off the supply of drive power to the power supply relay 2a, The contact of the relay 2a is turned off, and the drive power is supplied to the heating control means 2e and the heating switch detection means 8 immediately or after the internal temperature of the device or the temperature of the top plate 4 at the place where the pan 3 is installed decreases. Cut off.

  As described above, in the present embodiment, the on / off detection of the capacitive touch key is generally performed by an IC such as a microcomputer, but the power switch detection means 7 and the heating switch detection means 8 are respectively Since it is composed of ICs such as different microcomputers, if the heating means 2b is in the heating mode, either the power switch detection means 7 or the heating switch detection means 8 will malfunction such as runaway and touch keys. Since the touch key of the other component means can be detected even when the on / off state cannot be detected, the power switch 5 is touched with the finger to turn off the power relay 2a, or the finger of the power relay 2a is turned off with the finger. The operation mode can be changed from the heating mode to the initial mode by touching the heating off / on key 6a, and the output of the heating means 2b can be turned off.

  Further, since the power switch detection means 7 only detects on / off of the power switch 5, the microcomputer that realizes the power switch detection means 7 has relatively lower power consumption than the microcomputer that realizes the heating switch detection means 8. In the power-off state, the drive power is supplied only to the power switch detection means 7 to reduce the power (standby power) when the device is in the standby state.

In the present embodiment, the power switch detection means 7 outputs a pulse signal to the heating switch detection means at a predetermined cycle. Then, the heating switch detection means 8 detects that it is in an abnormal state when the pulse signal is not input over a period longer than the predetermined period, and forcibly turns off the output of the heating means 2b. If a signal is output to the heating control unit 2e, even if the power switch detection unit 7 runs out of control and cannot output a pulse signal, the heating switch detection unit 8 forcibly outputs the output of the heating unit 2b. Can be turned off to further improve the safety of the cooking device.

  The power switch detection means 7 is configured to output an H / L DC signal in accordance with the power-on state / power-off state. The drive power supply circuit 9 inputs an input signal from the power switch detection means 7 through an integration circuit formed of a resistor and a capacitor so that a pulse signal that becomes H is output, and the H period of the pulse signal In this case, the power switch is not detected, and the heating switch detecting means 8 detects that the power signal is on when the H signal lasts longer than the H period of the pulse signal, and when the pulse signal is input, the power switch is off. If the H signal is not input for a period longer than the predetermined period, it is detected that there is an abnormal state, and the heating control is performed so that the output of the heating means 2b is forcibly turned off. If a signal is output to the means 2e, the safety of the device when the power switch detection means 7 runs out of control should be further improved, and the power switch detection means 7 and the heating switch detection means 8 can be operated with one input / output. The power on state / power off state / runaway of the power switch detection means 7 can be transmitted.

  Further, the power switch detection means 7 detects the on / off of the power switch 5 at a predetermined cycle longer than the time required for on / off detection, and outputs a pulse signal in association with the on / off detection timing in the power off state. If it outputs, the heating switch detection means 8 can detect in which phase of the commercial power supply 1 the on / off detection of the power switch detection means 7 is performed, and when the heating means 2b is outputting. It is possible to adjust the degree of correction for noise that is superimposed on the signal of the power switch 5 and whose level depends on the amplitude of the commercial power supply 1.

(Embodiment 2)
FIG. 2 is a block diagram of a heating cooker according to the second embodiment of the present invention. The difference from the first embodiment is that, in addition to the heating unit 2, the pan 3, the heating instruction switch 6, and the heating switch detection means 8, a heating unit 10, a pan 11, a heating instruction switch 12, and a heating switch detection means 13 are added. The heating unit 10 includes a power relay 10a, a heating unit 10b, and a heating control unit 10e, and the heating unit 10b includes an inverter circuit 10c and a heating coil 10d. .

  Further, the heating instruction switch 12 is constituted by a heating off / on key 12a, an up key 12b, and a down key 12c.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. In addition, since the operation | movement regarding the heating part 2, the heating instruction | indication switch 6, and the heating switch detection means 8 is as having described in Embodiment 1, it abbreviate | omits description here.

  The operation of heating unit 10 to heat pan 11 is the same as the operation of heating unit 2 to heat pan 3 described in the first embodiment.

  In a state where the commercial power source 1 is connected to the cooking device for the first time, the power switch detection means 7 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 9 supplies drive power only to the power switch detection means 7 and detects that the power supply is off based on the signal input from the power switch detection means 7, and the power supply relay 2a, No driving power is supplied to 10a, the heating control means 2e, 10e, and the heating switch detection means 8, 13.

  The power supply relay 10a, the heating control means 10e, and the heating switch detection means 13 cannot operate without being supplied with drive power from the drive power supply circuit 9, and therefore the operation mode cannot be changed by the heating instruction switch 12 inevitably. The contact of the power supply relay 10a is turned off.

  Thereafter, when a person using the heating cooker touches the power switch 5 with a finger, the power switch detection means 7 detects the power switch 5 being turned on, and from the power off state indicating the main power off, the main power on And a signal indicating the power-on state is output to the drive power supply circuit 9.

  The drive power supply circuit 9 detects that the power is on based on a signal input from the power switch detection means 7, and in addition to the power switch detection means 7, the power relays 2a and 10a and the heating control means 2e. 10e and the heating switch detection means 8, 13 are also supplied with drive power.

  Then, the heating switch detection means 13 starts operating in the power-off mode, and then detects that the power is on based on the signal input from the power switch detection means 7, and changes the operation mode from the power-off mode. The mode is changed to the initial mode, and a signal indicating the initial mode is output to the heating control means 10e.

  The heating control means 10e starts operating in the power-off mode, maintains the contact-off of the power relay 10a, and then changes the operation mode from the power-off mode to the initial state based on the signal input from the heating switch detection means 13. The mode is changed and the contact of the power supply relay 10a is turned on.

  Thereafter, when a person using the heating cooker touches the heating off / on key 12a with a finger, the heating switch detection means 13 detects that the heating off / on key 12a is turned on, and changes the operation mode from the initial mode. Enter the heating mode and change the set thermal power to thermal power “6”.

  The heating control unit 10e changes the operation mode from the initial mode to the heating mode based on the signal input from the heating switch detection unit 13, changes the set heating power to the heating power “6”, and the output of the heating unit 10b is The inverter circuit 10c is controlled so as to be 1000W.

  At this time, when the person using the cooking device touches the up key 12b 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 12c with his / her finger. The set thermal power can be decreased step by step with the thermal power “1” as the lower limit.

  That is, when a person using the heating cooker touches the up key 12b with his / her finger, the heating switch detection means 13 detects that the up key 12b is turned on and changes the set thermal power from the thermal power “6” to the thermal power “7”. The heating control means 10e 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 13, and the output of the heating means 10b becomes 1450 W. Thus, the inverter circuit 10c is controlled.

  When a person using the heating cooker touches the down key 12c with his / her finger, the heating switch detection means 13 detects that the down key 12c is turned on and changes the set thermal power from the thermal power “6” to the thermal power “5”. The heating control means 10e 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 13, and the output of the heating means 10b is set to 800 W. Thus, the inverter circuit 10c is controlled.

Further, when the operation mode of the device is in the initial mode or the heating mode, when a person using the cooking device touches the power switch 5 with a finger, the power switch detection means 7 detects that the power switch 5 is turned on. Then, the power supply is switched from the power-on state to the power-off state, and a signal indicating the power-off state is output.

  The heating switch detection means 13 detects that the power is off based on the signal input from the power switch detection means 7, changes the operation mode from the initial mode or the heating mode to the power off mode, and also performs a heating instruction. The on detection of the switch 12 is invalidated.

  Furthermore, the heating control unit 10e changes the operation mode from the initial mode or the heating mode to the power-off mode based on the signal input from the heating switch detection unit 13, turns off the heating unit 10b, and outputs the power relay 10a. Turn the contact off.

  Further, the drive power supply circuit 9 detects that the power supply is off based on the signal input from the power switch detection means 7, and immediately cuts off the supply of drive power to the power supply relay 10a, and the power supply relay 10a. Is turned off, and the supply of drive power to the heating control means 10e and the heating switch detection means 13 is cut 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. .

  As described above, in the present embodiment, the power switch detection means 7 and the heating switch detection means 8 and 13 are configured by ICs such as different microcomputers, respectively, in a configuration including two sets of heating units. In the unlikely event that the heating means 2b and 10b are in the heating mode, either the power switch detection means 7 or the heating switch detection means 8 or 13 will cause a malfunction such as runaway, and the touch key cannot be turned on or off. However, since it is possible to detect the on / off of the touch key of the other constituent means, the power switch 5 is turned off by touching the power switch 5 with a finger, or the contacts of the power relays 2a, 10a are turned off, or the heating off / on key 6a is turned on with a finger. 10a can be touched to change the operation mode from the heating mode to the initial mode, and the outputs of the heating means 2b and 10b can be turned off.

  Moreover, since the power switch detection means 7 only detects the on / off of the power switch 5, the microcomputer realizing the power switch detection means 7 has relatively lower power consumption than the microcomputer realizing the heating switch detection means 8 and 13. In the power-off state, by supplying the drive power only to the power switch detection means 7, the power (standby power) when the device is in the standby state can be reduced. .

  In this embodiment, two sets of heating units such as heating units 2 and 10, heating instruction switches 6 and 12, and heating switch detection means 8 and 13 are used, but the same applies to three or more sets of heating units. The effect of can be obtained.

  FIG. 3 is a block diagram in which heating switch detection means of two sets of heating units of another cooking device according to the second embodiment are integrated into one. FIG. 4 is a block diagram in which the heating control means of two sets of heating units of another cooking device according to the second embodiment are integrated into one.

  In FIG. 2, the heating switch detection means 8 and the heating switch detection means 13 are respectively provided in the two sets of heating units 2 and 10, but as shown in FIG. 3, the heating switch detection is an IC such as one microcomputer. It integrates with the means 14 and changes the operation mode of the heating part 2 based on the input signal from the heating instruction switch 6 and outputs a signal to the heating control means 2e, or the heating part 10 based on the input signal from the heating instruction switch 12 It is also possible to change the operation mode and to output a signal to the heating control means 10e.

In FIG. 3, although two sets of heating units are provided with heating control means 2e and heating control means 10e, respectively, as shown in FIG. 4, they are integrated with heating control means 15 which is an IC such as one microcomputer. The heating switch detection means 14 changes the operation mode of the heating unit 2 based on the input signal from the heating instruction switch 6 and changes the operation mode of the heating unit 10 based on the input signal from the heating instruction switch 12 to A signal related to the operation mode of the unit 2 and the heating unit 10 is output to the heating control unit 15, and the heating control unit 15 controls the outputs of the heating unit 2 and the heating unit 10 based on the signal input from the heating switch detection unit 14. It can also be configured.

(Embodiment 3)
FIG. 5 is a block diagram of a heating cooker according to the third embodiment of the present invention. Differences from the first embodiment will be described.

  In FIG. 5, the zero voltage detection means 18 which connects with the commercial power source 1 via the zero voltage relay 17 and produces | generates and outputs the signal which shows the zero voltage point vicinity of the commercial power source 1 is newly provided and comprised.

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

  First, the power switch detection means 7 connects the commercial power supply 1 and the zero voltage detection means 18 by turning on the contact of the zero voltage relay 17 when the power is on.

  Therefore, the power switch detection means 7 can detect the on / off of the power switch 5 near the zero voltage point of the commercial power supply 1 based on the signal input from the zero voltage detection means 18.

  Further, the power switch detection means 7 in the power-off state turns off the contact of the zero voltage relay 17 and opens the commercial power supply 1 and the zero voltage detection means 18 at a predetermined cycle (about 10 msec to 100 msec). The on / off state of the power switch 5 is detected.

  Further, the heating switch detection means 8 can detect the on / off of the heating instruction switch 6 in the vicinity of the zero voltage point of the commercial power supply 1 based on the signal input from the zero voltage detection means 18.

  As described above, in the present embodiment, the zero voltage detection means 18 is newly connected to the commercial power source 1 via the zero voltage relay 17 to generate and output a signal indicating the vicinity of the zero voltage point of the commercial power source 1. When the power is on, the power switch detection unit 7 detects the on / off of the power switch 5 near the zero voltage point of the commercial power source 1, and the heating switch detection unit 8 is the commercial power source 1. Since the heating instruction switch 6 is detected on and off in the vicinity of the zero voltage point, when the heating means 2b outputs, it is superimposed on the signal of the power switch 5 or the heating instruction switch 6 and the level thereof is the commercial power supply 1 The degree of influence on noise that depends on the amplitude of the signal can be kept low.

  Further, when the power is off, the power switch detection means 7 does not connect the commercial power supply 1 and the zero voltage detection means 18 and detects the on / off of the power switch 5 at a predetermined cycle. Can be reduced, and the power consumption (standby power) when the device is not used can be further reduced.

  In the third embodiment, the power switch detection means 7 switches the timing of detecting the on / off of the power switch 5 by turning on / off the contact of the zero voltage relay 17 in association with the power on / off state. This is performed in association with the supply of drive power from the drive power supply circuit 9 to the heating switch detection means 8.

That is, when the drive power supply circuit 9 supplies drive power to the heating switch detection means 8, the contact of the zero voltage relay 17 is turned on to connect the commercial power supply 1 and the zero voltage detection means 18, and from the zero voltage detection means 18 When the on / off of the power switch 5 is detected in the vicinity of the zero voltage point of the commercial power source 1 based on the input signal and the drive power circuit 9 does not supply the drive power to the heating switch detection means 8, the contact of the zero voltage relay 17 is connected. The same effect can be obtained by turning off the commercial power source 1 and the zero voltage detecting means 18 and detecting the on / off of the power switch 5 in a predetermined cycle (about 10 msec to 100 msec).

  In the first to third embodiments, the driving power source 9 is single and has a plurality of outputs, but a plurality of single outputs or a combination of these may be used.

  Further, in the first to third embodiments, the heating means 2b and 3b are described as means for induction heating the pots 3 and 11, but means for heating the pots such as a radical heater, a halogen heater, and a sheathed heater. If it is, the same effect can be acquired.

  As described above, the heating cooker according to the present invention improves the safety when either one of the power switch detection means and the heating switch detection means malfunctions (runaway), and the heating cooker when the main power is off. Power consumption (standby power) can be reduced, such as induction heating means, a single-heating cooker using a radiant heater, a halogen heater, a sheathed heater, or a combination of these It is also effective for applications.

DESCRIPTION OF SYMBOLS 1 Commercial power supply 2b Heating means 2e Heating control means 3 Pan 4 Top plate 5 Power switch 6 Heating instruction switch (switch which performs instruction regarding the output of a heating means)
7 Power switch detection means 8 Heating switch detection means 9 Drive power supply circuit

Claims (6)

A heating means for heating the pan; a power supply relay for opening and closing a connection between the heating means and a power source serving as an input source; a drive power supply circuit for supplying drive power for the power supply relay; and a top provided above the heating means A plurality of capacitive touch keys including a plate, a power switch for turning on and off a main power supply provided on the top plate, and a switch for instructing output on / off of the heating means and an output amount ; and and a power switch detection means for alternately switching the power on state and the power-off state by detecting the on-off, the output off of Ya said heating means detects the off state of the switch for an instruction relating to the output oFF and output amount of said heating means a heat switch detecting means for changing the output settings amount, based on said signal input from said heating switch detection means In the configuration that includes a heating control means for controlling the output OFF and the output amount of the thermal unit, the power switch detection means, together with the constitute a heating switch detection means at different parts separated, said power switch detection means When the power is on, the drive power circuit supplies power to the power relay so that the contact of the power relay can be closed, and when the power switch detection means is power off, the drive power circuit is connected to the power relay. A cooking device that cuts off the power supply to the power supply and opens the contact of the power relay . The power switch detection means outputs a pulse signal at a predetermined period, the heating switch detection means, a long period the pulse signal than the predetermined period from the power switch detection means detects an abnormality that it is not input, the The cooking device according to claim 1, wherein a signal is output to the heating control means so as to turn off the heating means. The heating means as an input source to commercial power, the power switch detection means detects the off of the power switch at a predetermined period, and outputs the pulse signal in association with the timing of detecting the on-off of the power switch according Item 3. The cooking device according to Item 2. Driving power supply circuit, the commercial power supply as an input source, in addition to the power relay, the driving power of the heating control unit and the power supply switch detection means and the heating switch detection means and for supplying, to the power switch detection means Based on the signal input from the power switch detection means, the drive power is supplied to the heating switch detection means and the heating control means, and the power supply is switched from the power on state to the power off state. The cooking device according to any one of claims 1 to 3, wherein a driving power is not supplied to the heating switch detection means and the heating control means when a predetermined condition is satisfied after the change to. Wherein one of a combination of a power switch and the power switch detection means, a plurality of combinations including a switch for instructing relating to the output of said heating means and at least said heating means, said heating to control the output of said plurality of heating means and one or more control means, comprises one or more of the heating switch detection means for detecting the on-off switch for instructing relating to the output of said plurality of heating means, the power supply driving circuit, the power switch detection means Based on a signal input from the power switch detection means, the drive power is supplied to the one or more heating switch detection means and the one or more heating control means when the power is on. Supply one or more of the one or more when the predetermined condition is satisfied after the power is turned on. The heating cooker as claimed in claim 4, wherein the thermal switch detection means to the one or more heating control means does not supply the driving power. The heating means as an input source to commercial power, and includes a zero voltage detection means for outputting a signal indicating a near zero voltage point of the commercial power source, said power switch detection means, power-off state or from the driving power source circuit, in association with the supply of the drive power to the heating switch detection means, a connection between the commercial power and the zero-voltage detecting means, said power switch when not connecting the commercial power supply and the zero-voltage detection means in a predetermined cycle When the commercial power supply and the zero voltage detection means are connected, on / off of the power switch is detected in the vicinity of the zero voltage point of the commercial power supply based on a signal input from the zero voltage detection means, The heating switch detection means gives an instruction regarding the output of the heating means in the vicinity of a zero voltage point of the commercial power source based on a signal input from the zero voltage detection means. The cooking device according to claim 4 or 5 for detecting the on-off Urn switch.

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