JP2014025650A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker which suppresses power consumption due to a user's forgetting to close an appliance valve and reduces frequency of battery replacement.SOLUTION: A gas cooking stove equipped with appliance valves A, B with which ignition/fire extinction of a burner is manually operated is provided with: a transistor Q1 which is in an on-state when one of the appliance valves A, B is open and has a control unit 1 start power supply from a power supply part 2; and a power supply hold circuit 3 for holding the transistor Q1 to stay in the on-state. The control unit 1 holds the transistor Q1 in the on-state through a power supply hold circuit 3 when power supply from the power supply part 2 is started, while it stops power supply for the control unit 1 by putting the transistor Q1 in an off-state through the power supply hold circuit 3 when the appliance valve A of the burner is left open at the time combustion of the burner is forced to stop.

Description

  The present invention relates to a heating cooker, and more particularly to a heating cooker having a structure in which power is supplied to a control unit in conjunction with an operation of an appliance plug for manually operating ignition / extinguishing of a burner.

  2. Description of the Related Art Conventionally, a cooking device such as a gas stove is provided with an appliance plug as an operation unit for manually operating ignition / extinguishing of a burner for each burner. As the appliance plug, various types of appliance plugs such as a push button type and a knob rotation type are provided. However, in any type of appliance plug, the appliance cooker is provided by opening the appliance plug. Power is supplied from the power supply unit to the control unit (power supply), whereby the control unit is configured to operate.

  In other words, in this type of cooker, misfires in the middle of the burner, excessive heating of the cooking utensils being heated (for example, pans, frying pans, etc.), and forgetting to turn off the burner (continuous combustion for a long time) The control unit is configured to monitor various abnormalities during combustion. When the control unit detects such abnormalities, a process for forcibly stopping the combustion of the burner (for example, fuel gas to the burner) Etc.) (for example, see Patent Document 1).

Japanese Patent No. 2937822

  However, the heating cooker having a control configuration for forcibly stopping combustion of the burner regardless of the operation of the appliance plug has the following problems, and improvements have been desired.

  That is, in this type of cooking device, when the control unit forcibly stops combustion of the burner, the user is informed of the combustion stop and prompts the user to close the appliance plug (for example, However, if the user forgets to close the instrument plug, that is, the burner has stopped burning but the instrument plug is not open. If the device is left as it is, the state in which power is supplied to the control unit is continued until the instrument plug is closed, and there is a problem in that unnecessary power is consumed in the control unit.

  In particular, in this type of cooking device, batteries such as dry batteries are widely used as a power source. Therefore, useless power consumption in such a control unit leads to shortening of battery life and frequent battery replacement. There was a problem that had to be done.

  The present invention has been made in view of such problems, and its purpose is to reduce the frequency of battery replacement by suppressing power consumption due to forgetting to close the instrument plug and reducing the frequency of battery replacement. Is to provide a vessel.

  In order to achieve the above object, a heating cooker according to claim 1 of the present invention comprises an appliance plug for manually operating ignition or extinguishing of a burner, and a control configuration for forcibly stopping combustion of the burner when a predetermined condition is satisfied. And a power cooker that supplies power to the controller, the cooker is turned on on condition that the appliance plug is opened, and the controller is turned on from the power supply unit. Power supply switch means for starting power supply, and power supply holding means for maintaining the power supply to the control section by holding the power switch means in response to a control signal from the control section. The control unit is configured to hold the power switch unit in an on state through the power source holding unit when power supply from the power source unit is started, and control to forcibly stop combustion of the burner A control structure for shutting off the power supply to the control unit by turning off the power switch means through the power supply holding means when the instrument plug is maintained in an open state when executed. Features.

  In the cooking device according to the first aspect, when the appliance plug is opened, the switch means is turned on and the power supply from the power supply unit to the control unit is started. When the control unit is activated by starting the power supply, the control unit maintains the power switch unit in the ON state through the power supply holding unit, and maintains the power supply from the power source unit to the control unit.

  After the burner combustion starts (that is, during burner combustion), when the control unit executes control to forcibly stop the burner combustion, the instrument plug is opened without being manually closed. Is maintained, the control unit shuts off the power supply to the control unit by turning off the power switch unit through the power holding unit. As a result, power consumption in the control unit is eliminated, and power consumption in the control unit due to forgetting to close the appliance plug is prevented.

  The cooking device according to claim 2 of the present invention is the cooking device according to claim 1, wherein the appliance plug is turned on once and turned off when the appliance plug is opened. A first switch that returns, and a second switch that remains on until the instrument plug is opened and closed, and the power switch means is turned on when the first switch is turned on. And a configuration in which the control unit detects a signal indicating that the second switch is in an ON state.

  In the cooking device according to claim 2, the appliance plug is provided with two switches, a first switch and a second switch, which are operated by opening the appliance plug, and the first switch is connected to the control unit. The second switch functions as a switch that informs the controller of the state of the instrument plug (whether it is open or closed). That is, in the heating cooker according to the second aspect, apart from the switch (second switch) that informs the controller of the state of the appliance plug in the appliance plug, a switch (trigger for starting the supply of power to the controller) ( A first switch) is provided.

  A cooking device according to claim 3 of the present invention is the cooking device according to claim 1, further comprising pulse generation means for detecting that the appliance plug has been opened and outputting a one-shot pulse, The power switch means is configured to be turned on by a one-shot pulse from the pulse generating means.

  The cooking device according to claim 3 includes pulse generation means for detecting that the appliance plug has been opened and outputting a one-shot pulse, and the one-shot pulse from the pulse generation means is sent to the control unit. This is used as a trigger for starting the power supply. Therefore, in the cooking device according to claim 3, the appliance plug is provided only with a switch for notifying the controller of the state of the appliance plug (whether open or closed), and the pulse generating means is A one-shot pulse can be generated using the signal of this switch.

  A cooking device according to claim 4 of the present invention is the cooking device according to any one of claims 1 to 3, wherein a plurality of the burners are provided, and a plurality of appliance plugs are provided corresponding to each burner. When the burner corresponding to one appliance plug forcibly stops burning, and the burner corresponding to the other appliance plug continues to burn, the control section is configured to supply power switch means through the power holding means. It is characterized by having a control configuration for maintaining the ON state of.

  That is, in the cooking device according to claim 4, even when the control unit forcibly stops the combustion of the burner corresponding to one appliance plug, the burners corresponding to the other appliance plugs continue to burn. In this case, since the control unit maintains the power switch unit on through the power holding unit, it is avoided that the power supply to the control unit is cut off during combustion of the burner corresponding to another instrument plug. The

  According to the present invention, when the power supply from the power supply unit is started, the control unit executes the control configuration for holding the power switch unit through the power holding unit and the control for forcibly stopping the combustion of the burner. When the appliance plug is maintained in the open state, the power supply means is turned off through the power supply holding means to cut off the power supply to the control part. If the instrument plug is left unopened by manual operation when the control for forcibly stopping combustion is executed, the control unit turns off the power switch unit through the power holding unit and supplies power to the control unit. Since it interrupts | blocks, the power consumption in the control part by the forgetting to close an appliance stopper is suppressed. Therefore, when a battery is used as the power source of the power supply unit, battery consumption can be reduced, and the troublesomeness of frequent battery replacement is eliminated.

It is a circuit diagram which shows an example of the circuit structure of the power supply system of the heating cooker which concerns on this invention. It is a circuit diagram which shows an example of the modification of the power supply system of the same heating cooker. It is a circuit diagram which shows the circuit structure of the power supply system in 2nd Embodiment of the heating cooker. It is a circuit diagram which shows the circuit structure of the power supply system in 3rd Embodiment of the heating cooker. It is a circuit diagram which shows the circuit structure of the power supply system in 4th Embodiment of the heating cooker. It is a circuit diagram which shows the circuit structure of the power supply system in 5th Embodiment of the heating cooker.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1
The cooking device according to the present invention is a cooking device provided with a combustion section (burner) for cooking, and is composed of, for example, a gas stove that uses gas as fuel for the combustion section. The gas stove to which the present invention is applied monitors various abnormalities related to burner combustion such as misfire of the burner, excessive heating of cooking utensils, and forgetting to turn off the burner. When a related abnormality is detected, the burner combustion is forcibly stopped.

  FIG. 1 shows an example of a gas stove (heating cooker) to which the present invention is applied, particularly a circuit configuration of a power supply system thereof. Here, this FIG. 1 has shown the circuit structure of the power source system of the gas stove provided with two burners (not shown) as a combustion part for heat cooking. That is, FIG. 1 shows a power system of a gas stove provided with two instrument plugs (equipment plug A and instrument plug B) according to the number of burners. In the present embodiment, a gas stove with two burners will be described based on FIG. 1, but the number of burners may be one or two or more.

  First, the instrument plugs A and B will be described. The instrument plugs A and B are operation units for manually operating ignition or extinguishing of the corresponding burners (not shown), respectively, and their detailed structures are well known, and detailed description thereof is omitted. These instrument plugs A and B are both configured so that fuel gas is supplied to the corresponding burner by opening the instrument plug and ignition is performed on the burner, while corresponding to the operation by closing the instrument plug. The fuel gas supply to the burner is cut off, and the combustion of the burner is stopped. That is, it is configured such that when the appliance plug is opened, the corresponding burner starts the combustion operation, and when the appliance plug is closed, the combustion operation of the corresponding burner is stopped. In addition, as these instrument plugs A and B, there are provided various types of instrument plugs such as a push button type structure, a knob rotation type structure, and a touch panel type structure. The instrument plug of the aspect may be used.

  In this embodiment, each of the appliance plugs A and B includes an ignition switch (first switch) 10 that is turned on once and restored to an off state when the appliance plug is opened. A power switch (second switch) 11 that maintains an on state until the instrument plugs A and B are opened and closed (in the following description, the ignition switch on the instrument plug A side is denoted by 10a, The power switch is 11a, the ignition switch on the appliance plug B side is 10b, and the power switch is 11b). Here, for example, when the appliance plugs A and B are configured as push buttons, the ignition switch 10 continues to be on while the appliance plug is held in the pressed state, and the burner When the user who confirms the ignition of the button releases the push button, it is configured to return to the off state. In the case of such a push button type instrument plug, the operation of closing the instrument plug is configured such that the instrument plug is closed by pushing the push button again and returning the push button to the initial position.

  Next, the power system of the gas stove shown in FIG. 1 will be described. As shown in FIG. 1, the gas stove shown in the present embodiment includes a control unit 1, a power supply unit 2 that supplies power to the control unit 1, and power supply to the control unit 1 based on instructions from the control unit 1. A power holding circuit (power holding means) 3 to be held is configured as a main part. Reference numeral 4 denotes an igniter (ignition device) for igniting the burner.

  Here, the control unit 1 is configured by a control circuit including a microcomputer as a control center. By the control unit 1, ignition control of the igniter 4, monitoring of combustion of the burner described above, and combustion stop of the burner at the time of abnormality detection are performed. Processing is performed. In the present embodiment, the control unit 1 also controls a power holding circuit 3 described later. The power supply unit 2 is configured by using a battery (primary battery or secondary battery) such as a dry battery as a power source, and includes a battery holder (not shown) so that the battery can be replaced when the battery is exhausted. Between the power supply unit 2 and the control unit 1, there is a power supply holding circuit 3 including a transistor (power switch means) Q1 that permits power supply from the power supply unit 2 to the control unit 1 when in the on state. It is intervened.

  The power holding circuit 3 includes a PNP transistor Q1 having an emitter terminal connected to the positive electrode of the power supply unit 2 and a collector terminal connected to the power input unit of the control unit 1, and a base terminal of the transistor Q1 via a resistor R1. A set of NPN transistors Q2 and Q3 to which collector terminals are connected is used as a main part.

  Among these, the transistor Q2 has a base terminal connected to the other end of each ignition switch 10a, 10b whose one end is connected to the power supply unit 2 via a resistor R2, and at least one of the ignition switches 10a, 10b is turned on. When the state is reached, the transistor Q2 is also turned on, and the transistor Q1 is set to the on state. Here, one end of each of the ignition switches 10a and 10b is connected to the positive electrode of the power supply unit 2. When the ignition switches 10a and 10b are turned on, the voltage from the power supply unit 2 is applied to the base terminal of the transistor Q2. It is configured as follows.

  On the other hand, the base terminal of the transistor Q3 is connected to the holding signal output terminal of the control unit 1 via the resistor R3, and the on / off state of the transistor Q3 is controlled by the holding signal (control signal) output from the control unit 1. It is comprised so that. Specifically, the transistor Q3 is turned on when the holding signal is output from the control unit 1, and the transistor Q1 is set to the on state. When the holding signal from the control unit 1 is stopped, the transistor Q3 is turned off. If the transistor Q2 is off, the transistor Q1 is set to the off state.

  The other ends of the ignition switches 10a and 10b are also connected to the base terminal of the NPN transistor Q4 via a resistor R4. This transistor Q4 has an ignition instruction when one of the appliance plugs A, B is turned on, in other words, one of the appliance plugs A, B is opened. Is provided in order to notify the control unit 1 that the signal is generated. When the voltage from the power supply unit 2 is applied to the base terminal of the transistor Q4, the transistor Q4 is turned on and the control unit 1 is turned on. Is set to Lo to notify the controller 1 that an ignition instruction has been issued by operating the appliance plugs A and B.

  Between the transistor Q1 and the control unit 1, one end of each of the power switches 11a and 11b having the other end connected to the instrument plug inputs A and B of the control unit 1 is connected. A Hi signal (that is, a signal indicating that the power switch is on) is given to the instrument plug inputs A and B when 11b is on. Here, as described above, since the power switches 11a and 11b are configured to maintain the ON state until the instrument plugs A and B are opened and closed, the control unit 1 uses the instrument plug input A. , B can be detected whether or not the instrument plugs A and B are opened (whether the instrument plugs A and B are open or closed).

  The control unit 1 also includes a terminal (igniter output terminal) that outputs a signal for performing the ignition control of the igniter 4 described above. This igniter output terminal is connected to the base terminal of an NPN transistor Q5 whose collector terminal is connected to the igniter 4 via a resistor R5, so that the ignition operation by the igniter 4 is performed by turning on the transistor Q5. It has become.

Next, operation | movement of the gas stove comprised in this way is demonstrated.
In the gas stove of the present embodiment, for example, when the user performs an operation of opening the instrument plug A, the ignition switch 10a and the power switch 11a of the instrument plug A are turned on.

  When the ignition switch 10a is turned on, the transistor Q2 of the power holding circuit 3 is turned on and the transistor Q1 is also turned on. When the transistor Q1 is turned on, power supply from the power supply unit 2 to the control unit 1 is started via the transistor Q1, and the control unit 1 is activated.

  The activated control unit 1 is configured to output a holding signal instructing the power holding circuit 3 to hold the power, and the holding signal is sent to the transistor Q3 of the power holding circuit 3 by the activation of the control unit 1. Given. When the transistor Q3 is turned on, the on state of the transistor Q1 is maintained even when the transistor Q2 is turned off.

  Further, when the ignition switch 10a is turned on, the transistor Q4 is also turned on, the ignition input of the control unit 1 becomes Lo, and the control unit 1 is notified that an ignition instruction is issued from the appliance plug side. As a result, the control unit 1 outputs a signal for turning on the transistor Q5 from the igniter output terminal to cause the igniter 4 to perform an ignition operation. The igniter 4 shown in the present embodiment is configured as an ignition device common to the burner provided in the gas stove, and the control unit 1 receives the ignition input Lo regardless of which of the appliance plugs A and B is opened. Then, the igniter 4 is ignited.

  When the burner starts burning by the ignition operation of the igniter 4, the user who confirms the start of combustion stops the operation of the instrument plug A (if the instrument plug A is a push button type, the hand is released from the push button). The ignition switch 10a is turned off. However, at this time, since the transistor Q3 is already in the on state as described above, the transistor Q1 maintains the on state even when the transistor Q2 is in the off state, and the control unit 1 receives power from the power source unit 2. Power supply continues.

  In parallel with these processes, the control unit 1 monitors the instrument plug inputs A and B, and detects which instrument plug A and B is opened. That is, the control unit 1 is configured to determine that the instrument plug in which the Hi signal is input to the instrument plug inputs A and B is opened (note that both the instrument plugs A and B are opened). If there is a Hi signal, a Hi signal is input to both the instrument plug inputs A and B).

  Then, the control unit 1 confirms that there is no abnormality in combustion of the burner through the information obtained from sensors (not shown), the measurement of the combustion duration time in the control unit 1, etc. When the abnormality is detected in the burner combustion (when the condition set in advance as an abnormality in the control unit 1 is satisfied), the combustion of the burner in which the abnormality is detected is forcibly stopped. I do. Specifically, for example, processing such as stopping the supply of fuel gas to the burner in which an abnormality has been detected is performed.

  On the other hand, when the user performs an operation to close the instrument plug A, the power switch 11a of the instrument plug A is turned off. Accordingly, the instrument plug input A of the control unit 1 changes from Hi to Lo. . The control unit 1 detects that the instrument plug A has been closed when the instrument plug input becomes Lo. At this time, if the instrument plug B is closed (if the instrument plug input B is also Lo), the controller 1 stops outputting the holding signal, turns off the transistor Q3, and turns off the transistor Q1. Set to. That is, the control unit 1 stops the power supply to the control unit 1 on condition that all the instrument plugs are closed. At this time, if any of the appliance plugs is opened (here, the appliance plug B is opened), the burner corresponding to the appliance plug B is considered to be burning, so the control unit 1 Continues and maintains the power supply to the control unit 1 without stopping the output of the holding signal.

  By the way, as described above, in the gas stove having a control configuration in which the control unit 1 forcibly stops the combustion of the burner in which the abnormality is detected, the instrument plug of the burner that has been forcibly stopped must be closed by the user. The power switch 11 is kept on. That is, if there is no other burner that is burning at this time, the control unit 1 is continued to supply unnecessary power until the user closes the instrument plug of the burner whose combustion has been forcibly stopped.

  Therefore, in the gas stove shown in the present embodiment, when the control unit 1 forcibly stops the combustion of the burner, the control unit 1 is configured to stop the power supply to the control unit 1 in the following procedure.

  That is, in the gas stove shown in the present embodiment, for example, when the burner corresponding to the instrument plug A is burning, when the control unit 1 detects the combustion abnormality of the burner and forcibly stops the combustion. The control unit 1 determines whether the instrument plug A has been closed by the user. This determination is configured to be performed immediately after the forced stop of combustion or after a predetermined time has elapsed, and the control unit 1 confirms whether the instrument plug input A is Lo.

  If the instrument plug input A is in the Hi state in this determination, the control unit 1 determines that the instrument plug A is kept open without being closed, and a holding signal to the power holding circuit 3 is determined. The output of is stopped. That is, the transistor Q3 of the power holding circuit 3 is turned off, the transistor Q1 is set off, and the power supply to the control unit 1 is stopped.

  At that time, when the instrument plug B is opened (when the instrument plug input B of the control unit 1 is Hi), the burner corresponding to the instrument plug B can be regarded as burning. Continues and maintains the power supply to the control unit 1 without stopping the output of the holding signal. That is, the output of the holding signal in this control is configured to be performed on the condition that the combustion of all the burners other than the burner forcibly stopping the combustion can be regarded as stopped.

  That is, in the gas stove of the present embodiment, even when the combustion of the burner corresponding to one instrument plug is forcibly stopped, when the burner corresponding to another instrument plug is considered to continue burning, The control unit 1 is configured to continue the power supply from the power supply unit 2 to the control unit 1 while maintaining the hold signal without stopping the output of the hold signal.

  Thus, in the gas stove shown in the present embodiment, when the power supply from the power supply unit 2 is started, the control unit 1 outputs a holding signal to the power holding circuit 3 to hold the transistor Q1 in the on state. When the control configuration and the burner burner for which the combustion is stopped are maintained in an open state, the holding plug output is stopped and the transistor Q1 is turned off. The control unit 1 is configured so as to cut off the power supply to the control unit 1, so that even if the user forgets to close the appliance plug when the control unit 1 forcibly stops combustion of the burner, the control unit 1 Since power supply to the control unit 1 is cut off by self control, power consumption in the control unit 1 is suppressed.

  FIG. 2 shows a modification of the circuit configuration of the gas stove shown in FIG. In the gas stove shown in FIG. 2, the arrangement of the ignition switches 10a and 10b of the appliance plugs A and B is changed. That is, the gas stove shown in FIG. 2 is configured such that one ends of the ignition switches 10a and 10b are connected to the ground of the circuit.

  With this modification, the other end of each ignition switch 10a, 10b is connected to the base terminal of the transistor Q1 via a diode, the transistor Q2 is omitted, and a PNP transistor is used as the transistor Q4. The emitter terminal of the transistor Q4 is connected to the collector terminal of the transistor Q1, and the collector terminal is connected to the ignition input of the control unit 1, respectively.

  That is, also in the gas stove shown in FIG. 2, when the appliance plug A (or appliance plug B) is opened and the ignition switch 10a (or ignition switch 10b) is turned on, both the transistor Q1 and the transistor Q4 are turned on. It is configured as follows. Since the other configuration is the same as that of the gas stove shown in FIG. 1 described above, detailed description of the configuration and operation is omitted.

Embodiment 2
Next, a second embodiment of the present invention will be described with reference to FIG.
The gas stove shown in FIG. 3 is obtained by modifying the circuit configuration of the gas stove shown in the first embodiment. Specifically, the configuration of the switch that is turned on / off in conjunction with the operation of the instrument plugs A and B is modified. doing. Along with this modification, there is provided a pulse generation circuit (pulse generation means) 5 for generating a pulse signal in conjunction with the operation of the instrument plugs A and B.

  More specifically, in this gas stove, instead of the ignition switch 10 and the power switch 11 described above as switches that are linked to the operation of the appliance plugs A and B, the on state is maintained while the appliance plugs A and B are opened. The appliance plug switch 12 to be maintained is used (in the following description, the appliance plug switch on the appliance plug A side is 12a, and the appliance plug switch on the appliance plug B side is 12b).

  The instrument plug switches 12a and 12b are both connected at one end to the positive electrode of the power supply unit 2, and the other end of the instrument plug switch 12a is connected to the gate terminal of the FET Q6 via the resistor R6. The ends are connected to the gate terminal of the FET Q7 through the resistor R7. When the instrument plug switch 12a is turned on, the FET Q6 is turned on. When the instrument plug switch 12b is turned on, the FET Q7 is turned on. Therefore, the controller 1 turns on / off these FETs Q6 and Q7. It is comprised so that it may determine by the input of the instrument plug inputs A and B. Then, the control unit 1 determines which of the instrument plugs A and B is open by determining whether the FETs Q6 and Q7 are in an on / off state.

  Further, a pulse generation circuit 5 for generating a one-shot pulse (one pulse) when the instrument plug switches 12a and 12b are turned on is connected to the instrument plug switches 12a and 12b. 5 is input to the base terminal of the transistor Q2 to turn on the transistor Q2, so that the transistor Q1 is turned on. That is, in this embodiment, the transistor Q1 is turned on based on the pulse signal output from the pulse generation circuit 5 when the instrument plug switches 12a and 12b are turned on.

  Here, the pulse generating circuit 5 shown in the present embodiment is configured by an RC differentiating circuit. Specifically, a differentiation circuit with a resistor R11 and a capacitor C11 is provided on the instrument plug switch 12a side, and a differentiation circuit with a resistor R12 and a capacitor C12 is provided on the instrument plug switch 12b side. These differentiating circuits are connected to the other ends of the appliance plug switches 12a and 12b via diodes D11 and D12, and resistors R13 and R14 and resistors R15 and R16 are connected to both ends of each differentiating circuit. Connected to ground. Further, diodes D13 and D14 are connected in parallel to the resistors R11 and R12 of the differentiation circuit, respectively.

Next, operation | movement of the gas stove comprised in this way is demonstrated.
In the gas stove of the present embodiment, for example, when the user performs an operation to open the instrument plug A, the instrument plug switch 12a is turned on.

  When the appliance plug switch 12a is turned on, a pulse signal (one-shot pulse) generated by the resistor R11 and the capacitor C11 of the pulse generation circuit 5 is applied to the base terminal of the transistor Q2 of the power holding circuit 3. Then, when the transistor Q2 is turned on by this pulse signal, the transistor Q1 is also turned on. As a result, as in the first embodiment, the power supply from the power supply unit 2 to the control unit 1 is started. to start.

  Then, the activated control unit 1 applies a holding signal to the transistor Q3 as in the first embodiment to hold the transistor Q1 in the on state. The point that the control unit 1 stops outputting the holding signal when the instrument plugs A and B are closed or when the control unit 1 forcibly stops the combustion of the burner is the same as in the first embodiment.

  In the gas stove shown in the present embodiment, since the resistors R13, R14 and R15, R16 connected to the circuit ground are provided at both ends of each differentiation circuit of the pulse generation circuit 5, the appliance plug switches 12a, 12b When is turned off, the charges accumulated in the capacitors C11 and C12 are discharged through these resistors. Further, since the current always flows through the resistors R13 and R15 of the pulse generation circuit 5 when the appliance plug switches 12a and 12b are in the on state, use resistors having high resistance values for these resistors R13 and R15. Thus, the current flowing in the circuit can be suppressed and the battery consumption of the power supply unit 2 can be reduced.

Embodiment 3
Next, a third embodiment of the present invention will be described with reference to FIG.
The gas stove shown in FIG. 4 is a further modification of the circuit configuration of the gas stove shown in the second embodiment. Specifically, the gas stove has a switch configuration that is turned on / off in conjunction with the operation of the instrument plugs A and B. It has been modified.

  More specifically, in this gas stove, an instrument plug switch 13 capable of switching the connection between the NC terminal and the NO terminal is used as the instrument plug switch of the instrument plugs A and B (note that the following) In the description, the instrument plug switch provided on the instrument plug A side is referred to as 13a, and the instrument plug switch provided on the instrument plug B side is referred to as 13b).

  In this embodiment, the NC (normally closed) terminal on one end side of the instrument plug switches 13 a and 13 b is connected to the circuit ground, and the NO (normally open) terminal is connected to the positive electrode of the power supply unit 2. . And the other end (COM terminal) side of each appliance plug switch 13a, 13b is respectively connected to the gate terminal of FETQ6, Q7 via resistance R6, R7 similarly to Embodiment 2 mentioned above. That is, also in this embodiment, when the instrument plug switch 13a is turned on (the COM terminal is connected to the NO terminal), the FET Q6 is turned on, and when the instrument plug switch 13b is turned on, the FET Q7 is turned on. The controller 1 determines whether the FETs Q6 and Q7 are in the on / off state from the state of the instrument plug inputs A and B (the instrument plugs A and B are in the open / closed state). Whether there is any).

  Further, in the present embodiment, the pulse generation circuit 5 is configured to generate a one-shot pulse by the RC differentiating circuit for both the instrument plug switches 13a and 13b as in the second embodiment. Specifically, in the present embodiment, the instrument plug switch 13a side is provided by a differentiating circuit constituted by a resistor R21 and a capacitor C21, and the instrument plug switch 13b side is provided by a differentiating circuit constituted by a resistor R22 and a capacitor C22. Each is configured to generate a pulse signal. The capacitors C21 and C22 constituting the differentiation circuit are connected to the base terminal of the transistor Q2 via the diodes D22 and D24, and resistors R23 and R22 are connected to the circuit ground on the downstream side of the capacitors C21 and C22, respectively. R24 and diodes D21 and D23 are connected.

Next, operation | movement of the gas stove comprised in this way is demonstrated.
In the gas stove of this embodiment, for example, when the user performs an operation of opening the instrument plug A, the instrument plug switch 13a is turned on, and the COM terminal of the instrument plug switch 13a is connected to the NO terminal. As a result, the voltage from the power supply unit 2 is applied to the differentiation circuit composed of the resistor R21 and the capacitor C21 of the pulse generation circuit 5, and the pulse signal (one-shot pulse) generated by this differentiation circuit is applied to the transistor Q2 of the power supply holding circuit 3. Given to the base terminal. As in the case of the second embodiment, when the transistor Q2 is turned on, the transistor Q1 is turned on, power supply from the power supply unit 2 to the control unit 1 is started, and the control unit 1 is activated.

  Then, the activated control unit 1 applies a holding signal to the transistor Q3 as in the above-described second embodiment, and holds the transistor Q1 in the on state.

  In this embodiment, when the user performs an operation of closing the instrument plug A, the instrument plug switch 13a is turned off, and the COM terminal of the instrument plug switch 13a is connected to the NC terminal. Accordingly, since the FET Q6 is turned off, the control unit 1 detects that the instrument plug A is closed by the instrument plug input A. Also in this embodiment, the control unit 1 monitors the combustion of the burner as in the first and second embodiments, and forcibly stops the combustion of the burner when an abnormality is detected, and also holds the holding signal. The process of stopping the output is the same as in the first and second embodiments.

  In the gas stove shown in this embodiment, when the appliance plug switches 13a and 13b are turned off, the charges stored in the capacitors C21 and C22 of the differentiating circuits of the pulse generation circuit 5 are the resistance R21, the appliance plug switch 13a, and the resistance. It is discharged by R23 and diode D21 (resistor R22, appliance plug switch 13b, resistor R24 and diode D23).

Embodiment 4
Next, a fourth embodiment of the present invention will be described with reference to FIG.
The gas stove shown in FIG. 5 is a further modification of the circuit configuration of the gas stove shown in the second embodiment. Specifically, the pulse generation circuit 5 instructs the discharge of the capacitors C31 and C32 constituting the RC differentiating circuit. The discharge signal to be output is configured to be output from the control unit 1, and a part of the configuration of the pulse generation circuit 5 is changed accordingly.

  More specifically, in this gas stove, the pulse generation circuit 5 that generates a one-shot pulse is configured to include an RC differentiation circuit, as in the second embodiment. More specifically, the pulse generation circuit 5 is provided with a differentiation circuit using a resistor R31 and a capacitor C31 on the instrument plug switch 12a side, and a differentiation circuit using a resistor R32 and a capacitor C32 on the instrument plug switch 12b side. Each differentiation circuit is connected to the other ends of the appliance plug switches 12a and 12b via diodes D31 and D32.

  In addition, as in the second embodiment, resistors R33 and R34 and resistors R35 and R36 are connected to both ends of each differential circuit between the circuit grounds. In this embodiment, an NPN transistor whose base terminal is connected to the discharge signal output terminal of the control unit 1 between the resistors R33 and R35 connected to the circuit ground and the circuit ground in each differential circuit. Q31 and Q32 are connected.

  These transistors Q31 and Q32 are elements provided for conducting the resistors R33 and R35 and the circuit ground based on the discharge signal output from the control unit 1, and are the base terminals of the transistors Q31 and Q32. Is connected to the discharge signal output terminal of the controller 1 via resistors R37 and R39.

  In this embodiment, the other ends of the appliance plug switches 12a and 12b are elements such as digital transistors (specifically, elements that receive voltage signals and output voltage signals) instead of the FETs Q6 and Q7, IC1 and IC2. However, when the instrument plug switch 12a is turned on, a signal is input from the element IC1 to the instrument plug input A, and when the instrument plug switch 12b is turned on, a signal is input from the IC2 to the instrument plug input B. In the second embodiment, the control unit 1 determines whether or not the elements IC1 and IC2 are in operation by inputting the instrument plug inputs A and B, and determines which of the instrument plugs A and B is open. It is the same.

  In the gas stove thus configured, for example, when the user opens the instrument plug A, the instrument plug switch 12a is turned on and is generated by the resistor R31 and the capacitor C31 of the pulse generation circuit 5. A pulse signal (one-shot pulse) is applied to the base terminal of the transistor Q2 of the power holding circuit 3, both the transistor Q2 and the transistor Q1 are turned on, and the power supply from the power supply unit 2 to the control unit 1 is started. The point at which the control unit 1 is activated, the point at which the activated control unit 1 applies a holding signal to the transistor Q3 to keep the transistor Q1 in the on state, and when the appliance plugs A and B are closed or the control unit 1 Embodiment 2 is that the control unit 1 stops the output of the holding signal when the combustion of the burner is forcibly stopped. It is the same.

  In the gas stove shown in the present embodiment, when both the instrument plugs A and B are closed (when the instrument plug switches 12a and 12b are both turned off), the control unit 1 outputs a holding signal. Before stopping, a discharge signal is output, both transistors Q31 and Q32 are turned on, and the charge stored in the capacitors C31 and C32 of the pulse generation circuit 5 is discharged through resistors R33 and R35. Yes.

  In the gas stove shown in this embodiment, when all the appliance plugs A and B are closed as described above, the electric charges of the capacitors C31 and C32 are discharged by the discharge signal from the control unit 1. Next, when the instrument plugs A and B are opened (when the instrument plug switches 12a and 12b are turned on), the pulse signal for reliably turning on the transistors Q2 and Q1 is output from the pulse generation circuit 5. Can do.

Embodiment 5
Next, a fifth embodiment of the present invention will be described with reference to FIG.
The gas stove shown in FIG. 6 is a further modification of the circuit configuration of the gas stove shown in the second embodiment. Specifically, the gas stove is an element that operates in response to the ON state of the instrument plug switches 12a and 12b. Bipolar transistors are used in place of the FETs Q6 and Q7, and diodes D43 and D44 are added to the circuit for discharging the charges stored in the capacitors C41 and C42 of the RC differentiating circuit in the pulse generation circuit 5. The rest of the configuration is the same as that of the second embodiment, and the detailed description of the circuit configuration and operation is omitted.

  The above-described embodiments show preferred embodiments of the present invention, and the present invention is not limited to these, and various design changes can be made within the scope of the invention.

  For example, in the above-described embodiment, the case where the present invention is applied to a gas stove using a battery as a power source of the power supply unit 2 is shown, but the power source of the power supply unit 2 is not limited to the battery.

DESCRIPTION OF SYMBOLS 1 Control part 2 Power supply part 3 Power supply holding circuit (Power supply holding means)
4 Igniter 5 Pulse generation circuit (pulse generation means)
10 Ignition switch (first switch)
11 Power switch (second switch)
Q1 transistor (power switch means)

Claims (4)

Heating provided with an instrument plug for manually operating ignition or extinguishing of the burner, a control unit having a control configuration for forcibly stopping combustion of the burner when a predetermined condition is satisfied, and a power source unit for supplying power to the control unit In the cooker,
A power switch means which is turned on on the condition that the instrument plug is opened, and which causes the control unit to start supplying power from the power unit;
Power holding means for holding the power switch means in an on state in accordance with a control signal from the control part and maintaining power supply to the control part,
When the control unit executes a control configuration for holding the power switch unit in an on state through the power source holding unit when power supply from the power source unit is started, and a control for forcibly stopping combustion of the burner A heating structure comprising: a control structure for shutting off power supply to the control unit by turning off the power switch means through the power holding means when the appliance plug is maintained in an open state. Cooking device. The instrument plug has a first switch that is turned on once and returns to an off state when the instrument plug is opened, and a second switch that maintains the on state until the instrument plug is opened and closed. With a switch,
The power switch means is turned on when the first switch is turned on, and the control unit detects a signal that the second switch is turned on. The cooking device according to claim 1.   It has a pulse generation means for detecting that the appliance stopper has been opened and outputs a one-shot pulse, and has a configuration in which the power switch means is set to an ON state by a one-shot pulse from the pulse generation means. The cooking device according to claim 1.   A plurality of burners and a plurality of appliance plugs corresponding to each burner are provided, and when the control unit forcibly stops burning of the burner corresponding to one appliance plug, The cooking device according to any one of claims 1 to 3, further comprising a control configuration for maintaining the ON state of the power switch means through the power holding means when the corresponding burner continues to burn. vessel.

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