JP6936621B2 - Gas cooker - Google Patents

Description

The present invention relates to a gas cooker.

Some gas stoves, which are gas cookers, are not equipped with a power switch for supplying power to the control unit. In such a model, power is supplied to the control unit and the burner is ignited by pressing the point fire extinguishing button as an operation unit for instructing the start and stop of heating by the burner to perform the ignition operation. It is said.

In such a gas stove, a so-called child lock is provided in order to prevent the burner from being ignited by pushing the point fire extinguishing button due to, for example, a child's mischievous operation (see, for example, Patent Document 1). ..

Japanese Unexamined Patent Publication No. 6-147481

The above-mentioned child lock mechanically prevents the push-in operation of the point fire extinguishing button by operating the knob of the lock lever or the like to the lock position.

In the child lock that mechanically prevents the point fire extinguishing button from being pushed in this way, a locking member or the like that regulates the pushing of the point fire extinguishing button in conjunction with the pinching of the lock lever or the like is required. The number of parts is large, the structure is complicated, and the cost is high.

Further, since the position where the knob of the lock lever or the like is provided is also restricted in the vicinity of the point fire extinguishing button, the degree of freedom in design is limited.

In particular, in a model provided with a plurality of stove burners and grill burners, the tendency becomes remarkable because it is necessary to mechanically prevent the ignition operation of the point fire extinguishing button of each burner.

The present invention has been made in view of the above points, and an object of the present invention is to reduce the number of child locks that mechanically block the ignition operation of the burner as much as possible.

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

(1) In the present invention, a burner for heating an object to be heated, a heating / stopping operation unit operated to command the start and stop of heating by the burner, and a gas for supplying fuel gas to the burner. An on-off valve provided in the flow path that opens and closes the gas flow path to supply and shut off fuel gas to the burner, controls the on-off valve, and is based on the operation of the heating / stopping operation unit. , A control unit that controls the start and stop of heating of the burner, and gas cooking that starts supplying power to the control unit in response to an operation of a heating start command by the heating / stop operation unit. It ’s a vessel,
When the child lock mode is set, the control unit closes the on-off valve when the power supply is started in response to the operation of the heating start command by the heating / stop operation unit. To shut off the supply of fuel gas to the burner .
The child lock mode setting operation unit operated to set the child lock mode, the switch means for supplying and shutting off the power to the control unit, and the child lock mode operated by the child lock mode setting operation unit. Equipped with a storage unit that stores the presence or absence of the setting of
The switch means starts supplying power to the control unit in response to the operation of the heating start command by the heating / stop operation unit, and responds to the operation of the child lock mode setting operation unit. It starts supplying power to the control unit.
When it is determined that the child lock mode is set based on the stored contents of the storage unit, the control unit responds to the operation of the heating start command by the heating / stopping operation unit, and said the above. When the power supply is started, the on-off valve is held in the closed state to shut off the supply of fuel gas to the burner .

According to the present invention, when the child lock mode is set and the heating / stopping operation unit is operated to supply power to the control unit, the control unit keeps the on-off valve in the closed state and sends it to the burner. Since the supply of fuel gas is cut off, the burner does not ignite and start heating. As a result, it is not necessary to provide a child lock that mechanically blocks the operation of the heating start command of the heating / stopping operation unit, the structure can be simplified, and the cost can be reduced.

According to the present invention, when cooking by the gas cooker is completed and the child lock mode setting operation unit is operated to set the child lock mode, the switch means starts supplying power to the control unit. It is possible to store in the storage unit that the control unit is activated and the child lock mode is set. After the child lock mode setting is completed, for example, when the heating / stopping operation unit is operated by a child's mischief, power is supplied to the control unit, and the control unit reads out the contents of the storage unit and locks the child. Recognizing that the mode is set, the on-off valve is held in the closed state to shut off the supply of fuel gas to the burner, so that the burner does not ignite and start heating.

( 2 ) The present invention includes a plurality of burners for heating an object to be heated, a plurality of heating / stopping operating units operated to command the start and stop of heating by the plurality of burners, and the plurality of heating / stopping operating units. A plurality of on-off valves provided in the gas flow path for supplying fuel gas to the burner to open and close the gas flow path to supply and shut off the fuel gas to the burner, and the plurality of on-off valves are controlled. A control unit that controls the start and stop of heating of the plurality of burners based on the operation of the plurality of heating / stop operation units is provided, and responds to the operation of the heating start command by the heating / stop operation unit. A gas cooker that starts supplying power to the control unit, and has a lock position for restricting the operation of some of the heating / stopping operation units among the plurality of heating / stopping operation units. When the child lock operation unit is switched to the unlock position for releasing the regulation and the child lock operation unit is in the lock position in conjunction with the switching operation of the child lock operation unit, a part of the child lock operation unit is used. The operation position for the heating start command by the heating / stopping operation unit is restricted to a restricted position that prohibits the heating start of the burner, while when the child lock operation unit is in the unlocking position, the heating start is performed. The control unit includes a regulation means for releasing the restriction on the operation position for a command, and an operation position detection unit for detecting whether the child lock operation unit is in the lock position or the unlock position. If it is determined that the child lock operation unit is in the lock position based on the detection output of the operation position detection unit, it is assumed that the child lock mode is set, and the plurality of heating / stop operation units are set. When the power supply is started in response to the operation of the heating start command by the remaining heating / stopping operation unit other than the partial heating / stopping operation unit, the on-off valve is closed. Hold and shut off the supply of fuel gas to the burner.

According to the present invention , among a plurality of heating / stopping operation units, some of the heating / stopping operation units are linked to the operation of the child lock operation unit by operating the child lock operation unit to set the lock position. It is possible to regulate the operation position for the heating start command by the partial heating / stopping operation unit to the restricting position for prohibiting the heating start of the burner, that is, the partial heating / stopping. A child lock that mechanically blocks the operation by the operation unit is possible.

Further, with respect to the remaining heating / stopping operation unit other than the part of the heating / stopping operation unit in which the mechanical child lock is performed, the control unit receives power when the heating / stopping operation unit is operated. When the operation position detector detects that the child lock operation unit is in the locked position, the on-off valve is held in the closed state to shut off the supply of fuel gas to the burner, so that the burner ignites and heats up. Never start. That is, for the remaining heating / stopping operation unit, the child lock, that is, the child lock mode is executed under the control of the control unit, so that it is not necessary to provide a regulatory means for mechanical child lock, and the amount is increased accordingly. , The structure is simplified.

Further, since the control unit determines whether the child lock operation unit is in the lock position or the unlock position based on the detection output of the operation position detection unit, the control unit is used to set the child lock mode. There is no need to supply power to the device or store the child lock mode setting in the storage unit. Moreover, it is not necessary to separately provide an operation unit for setting the child lock mode for setting the child lock mode for the remaining heating / stopping operation unit.

( 3 ) In another embodiment of the present invention, the plurality of burners include a stove burner and a grill burner, and a part of the heating / stopping operation unit is a heating / stopping operation unit corresponding to the grill burner.

According to this embodiment, the operation of the heating start command of the heating / stopping operation unit of the grill burner is mechanically blocked by the regulating means, while the operation of the heating start command of the heating / stopping operation unit of the stove burner is the control unit. However, since it is blocked by the control of holding the on-off valve in the closed state, that is, by executing the child lock mode, for the stove burner, a regulatory means for mechanically blocking the operation of the heating start command of the heating / stopping operation unit. It is not necessary to provide such as, and the structure is simplified accordingly. Further, for the stove burner, the child lock mode is set because the on-off valve is held in the closed state and the child lock mode is executed when the stove burner is in the locked position by detecting the operation position of the child lock operation unit of the grill burner. It is not necessary to separately provide an operation unit for this purpose.

According to the present invention, when the child lock mode is set and the heating / stopping operation unit is operated to supply power to the control unit, the control unit keeps the on-off valve in the closed state and burners. Since the supply of fuel gas to is cut off, the burner does not ignite and start heating. As a result, it is not necessary to provide a regulating member or the like that mechanically blocks the operation position of the heating / stopping operation unit, the structure can be simplified, and the cost can be reduced.

It is an overall perspective view of the gas stove of one Embodiment of this invention. It is a front view of the cooking setting part of the gas stove of FIG. It is explanatory drawing of the gas supply to the stove burner and the grill burner of the gas stove of FIG. It is the schematic sectional drawing of the gas valve block of the gas stove of FIG. It is sectional drawing of the stove burner of the gas stove of FIG. It is a figure which shows the relationship between the open / closed state of a latch type solenoid valve, and the thermal power of a burner. It is a circuit diagram of the main part of the gas stove of FIG. It is a front view of the gas stove of another embodiment of this invention. It is a perspective view which shows the back side of the point fire extinguishing button in the unlocked state of the gas stove of FIG. It is a perspective view which shows the back side of the point fire extinguishing button in the locked state of the gas stove of FIG. It is a circuit diagram of the main part corresponding to FIG. 7 of the gas stove of FIG.

Hereinafter, a gas stove as a gas cooker according to an embodiment of the present invention will be described with reference to the attached drawings.

FIG. 1 is an overall perspective view of a gas stove 1 according to an embodiment of the present invention, which is a built-in type gas stove including a stove portion and a grill portion.

A plurality of heating portions 2 are provided on the top plate 11 forming the top surface portion of the gas stove 1. In the present embodiment, as shown in FIG. 1, a stove portion 2a provided with a high-heat power stove burner 31 is provided as a heating portion 2 on the left side and the right side. On the upper surface of the top plate 11, a trivet 21 is provided around each stove burner 31, and the stove burner 31, the trivet 21, the ignition device 23, and the ignition detection device 24 (see FIG. 3) form a heating unit. The stove portion 2a as 2 is configured.

The ignition device 23 is provided with one input circuit (including the primary side winding of the high voltage transformer) and one output circuit (secondary winding of the high voltage transformer) for each burner. By energizing the input circuit, a high voltage is generated in each of the output circuits (secondary winding of the high voltage transformer), and a high voltage for ignition discharge is supplied to all of the burners.

As shown in FIG. 5, each stove portion 2a includes a container detecting means 25 for detecting a cooking container as an object to be heated placed on the trivet 21, and a temperature sensor 26 for detecting the temperature of the lower surface of the cooking container. And are provided. The container detecting means 25 includes a support portion 25a fixed to the gas stove 1, a movable portion 25b movably supported by the support portion 25a in the vertical direction, and a detection switch 25c for detecting the vertical position of the movable portion 25b. Will be done. The movable portion 25b is urged upward by an urging means (not shown) such as a spring, and its upper end portion protrudes above the trivet 21. When the cooking container is placed on the trivet 21 in this state, the upper end of the movable portion 25b is pushed down by the lower surface of the cooking container, and the downward movement is detected by the detection switch 25c as the movable portion 25b moves downward, which will be described later. It is recognized by the control unit consisting of the microcomputer. Then, the temperature sensor 26 is provided at the upper end of the movable portion 25b, and when the cooking container is placed on the trivet 21, the temperature is detected by contacting the lower surface of the cooking container, and the detected temperature is recognized by the control unit. Will be done.

Further, as shown in FIG. 1, the gas stove 1 is provided with a grill portion 2b as a heating portion 2. The grill portion 2b of this embodiment is a single-sided grill, and has a grill storage formed in the central portion of the main body of the gas stove 1, an upper grill burner 29 (see FIG. 3) provided in the grill storage, an ignition device 23, and an ignition device 23. It is composed of an ignition detection device 24, and the front end of the grill portion 2b is open to the front portion 12 of the gas stove 1 and is closed by the grill door 28 so as to be openable and closable. The grill portion 2b is not limited to the single-sided grill, and may be a double-sided grill.

The ignition device 23 uses a high-pressure pulse generated by an igniter (not shown) to cause a spark plug provided at a fuel gas discharge port of the control burner 31 and the upper grill burner 29 to discharge and ignite. The igniter is described above. It is controlled by the control unit.

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

As shown in FIG. 1, front panels P1 and P2 forming the front surface portion 12 of the gas stove 1 are provided on both sides of the grill door 28 together with the grill door 28. A point fire extinguishing button 14a for igniting and extinguishing the left control burner 31 is provided on the upper side of the left front panel P1 and for igniting and extinguishing the upper grill burner 29 on the upper side of the right front panel P2. A point fire extinguishing button 14b and a point fire extinguishing button 14c for igniting and extinguishing the control burner 31 on the right side are provided. These point fire extinguishing buttons 14 (14a to 14c) are heating / stopping operation units operated to command the start and stop of heating in the heating unit 2. Further, on the front surface portion 12, thermal power adjusting levers 15 (15a to 15c) operated to adjust the heating amount of each heating portion 2 are provided above the point fire extinguishing buttons 14a to 14c, respectively.

As shown in FIG. 2, a cooking setting unit 7 for the stove is provided under the front panel P1 on the left side of the gas stove 1, and an operation unit for the grill is provided on the lower left side of the front panel P2 on the right side of the gas stove 1. 8 is provided. Further, at the lower right of the front panel P2 on the right side of the gas stove 1, a battery case 13 for accommodating a battery serving as a power source for the microcomputer constituting the control unit is provided.

As shown in FIG. 2, the cooking setting unit 7 for the stove includes a setting unit and a display unit for setting a menu for automatic cooking of fried food, rice cooking, and hot water, and a plus key for setting the cooking time. It includes a timer input unit 71 including a 71a and a minus key 71b, and a timer display unit 72.

Further, in this embodiment, a child lock mode setting operation unit, which is operated to set the child lock mode described later, is provided at the lower right end of the cooking setting unit 7, and a child lock mode is provided. A child lock lamp 91 is provided to light and display the child lock lamp 91.

FIG. 3 is an explanatory view of gas supply to the stove burner 31 and the upper grill burner 29 of the gas stove 1, and FIG. 4 is a schematic cross-sectional view of a gas valve block 6 for supplying and shutting off fuel gas to each burner. .. The gas valve block 6 has the same specifications as the stove burner 31 and the upper grill burner 29.

The gas valve block 6 is provided with an internal gas flow path 61, an introduction port 61a which is an upstream end of the gas flow path 61, and an outlet port 61b which is a downstream end of the instrument plug main body 60. The internal gas flow path 61 is provided with a valve hole for the safety valve 62 and a valve hole for the main valve 63 from the upstream side. On the downstream side of the valve hole for the main valve 63, a flow path 61c for a large fire and a flow path 61d for a small fire are provided in parallel, and a latch for switching between large heat and small heat is provided in the flow path 61c for a large fire. A valve hole for the type solenoid valve LB1 is provided, and a valve hole for the latch type solenoid valve LB2 is provided in the flow path 61d for a small fire.

In this embodiment, the latch-type solenoid valves LB1 and LB2 are on-off valves provided in the gas flow paths 61 for supplying fuel gas to the burners 31 and 29, respectively, as shown in FIG. The opening and closing is controlled by the control unit as described later to shut off the supply of fuel gas. When switching between the large thermal power and the small thermal power is not performed, the latch solenoid valve of either one of the latch solenoid valves LB1 and LB2 and the flow path thereof may be omitted. Further, the latch type solenoid valves LB1 and LB2 may be provided in series instead of in parallel. In this case, one of the latch type solenoid valves may be closed to shut off the fuel gas supply.

A flow path 61c for a large fire and a flow path 61d for a small fire are formed on the downstream side of the valve hole of the latch type solenoid valve LB1 and the downstream side of the small fire orifice of2 located on the downstream side of the latch type solenoid valve LB2. Are merged, and a valve hole for a flow control valve 65 interlocking with the thermal power adjusting lever 15 is provided on the downstream side thereof.

Incidentally, when the point fire extinguishing button 14 is operated when the cooking container is not detected by the container detecting means 25 described above, the latch type solenoid valve LB1 and the latch type solenoid valve LB2 are closed by the control unit to heat the cooking container. Container detection control is performed to prevent the start, and the stove burner 31 is configured so that a flame is not formed when the cooking container is not placed on the trivet 21.

Further, the gas flow path 61 is provided with a bypass flow path BP that bypasses the portion provided with the latch type solenoid valve LB1 and the latch type solenoid valve LB2, and the bypass flow path BP is provided with a bypass orifice of1. be. The bypass orifice of1 is provided for sharing the gas valve block 6 with a plurality of models, and may be opened when the gas valve block 6 is used for application to other models. The bypass orifice of1 is closed by an obstructing body (not shown).

When the thermal power adjusting lever 15 is set at a position between medium heat and large heat, the thermal power of the burner is increased according to the combination of opening and closing of the latch type solenoid valve LB1 and the latch type solenoid valve LB2. Adjustment control is performed by the control unit in the manner shown in FIG.

The latch-type solenoid valves LB1 and LB2 shift to the open state by energizing the pulse current of the polarity for valve opening, and then maintain the open state even after the energization is stopped, and the polarity for valve closing (valve opening). It shifts to the closed state by energizing the pulse current (which has the opposite polarity to that used), and then maintains the closed state even after the energization is stopped. At this time, the pulse width of the current is set to, for example, 200 to 300 msec, which saves power even when the thermal power is maintained in various states. Therefore, it is particularly suitable when a dry battery is used as a power source for the device. Used.

The downstream side of the valve hole for the flow control valve 65 reaches the outlet 61b for supplying gas to the stove burner 31.

A slider 66 is attached to the instrument plug main body 60 so as to be movable in the front-rear direction, and the slider 66 retracts when the front end surface is pressed backward by the point fire extinguishing button 14.

The point fire extinguishing button 14 is provided so as to be movable back and forth. The front end surface of the slider 66 is pressed backward. The slider 66 is provided with a front position / rear position switching mechanism (not shown) composed of, for example, an existing heart-shaped cam, and each time the point fire extinguishing button 14 is pressed and operated, the slider 66 is moved from the rear position. The front position and the rear position are switched and held by moving forward to the front position or retreating from the front position to the rear position.

Further, a valve rod 67 that advances and retreats as the slider 66 advances and retreats is provided. The tip end side of the valve rod 67 is inserted into the gas flow path 61, and the tip end portion is inserted into the valve hole for the main valve 63 and the valve hole for the safety valve 62 toward the rear, that is, the upstream side from the downstream side. Has been done. When the slider 66 switches from the front position to the rear position, the valve rod 67 once retracts to the last position behind the rear position and then advances to the rear position. When the slider 66 moves to this last position, the valve rod 67 is used for the safety valve 62. The valve body of the safety valve 62, which closes the valve hole of the safety valve 62 from the upstream side, is moved to the upstream side to open the valve hole for the safety valve 62. The safety valve 62 is composed of a solenoid valve, and the valve hole for the safety valve 62 is closed from the rear when the valve body advances forward, that is, the downstream side, and the valve hole for the safety valve 62 is retracted to the rear, that is, the upstream side. To open.

The safety valve 62 is maintained in the open state by the control unit only when the flame is detected by the ignition detection device 24, and when the flame is no longer detected, the maintenance of the open state by the control unit is stopped and closed. As a result, the outflow of fuel gas is prevented when the flame of the ignition detection device 24 is not detected due to extinction due to boiling spill or wind. Further, when the temperature of the lower surface of the cooking container detected by the temperature sensor 26 reaches a predetermined temperature (for example, 250 ° C.), it is determined that an abnormality such as empty heating or scorching has occurred, and the safety valve 62 is closed. .. As described above, the safety valve 62, the ignition detection device 24, and the temperature sensor 26 constitute the abnormality detection means.

A main valve body for opening and closing a valve hole for the main valve 63 is provided in the middle of the valve rod 67. When the slider 66 is located at the front position, the main valve body closes the valve hole for the main valve 63 from the rear, and when the slider 66 is located at the rear position, the main valve body is for the main valve 63. The valve hole for the main valve 63 is opened at a position rearward from the valve hole.

The opening degree of the valve hole for the flow control valve 65 can be freely adjusted by moving the needle 65a for adjusting the thermal power in the front-rear direction. The opening degree of the needle 65a is adjusted by operating the thermal power adjusting lever 15, and the needle 65a is adjusted so that the amount of fuel gas supplied increases as the thermal power adjusting lever 15 moves to the right.

An instrument plug switch that switches ON / OFF depending on the position of the point fire extinguishing button 14 or the slider 66 is provided. The instrument plug switch is turned off when the point fire extinguishing button 14 (or slider 66) is located at the front position, and turned on when the point fire extinguishing button 14 (or slider 66) is located at the rear position (including the last position).

To ignite the stove burner 31 and the upper grill burner 29, the point fire extinguishing button 14 is pushed and operated to retract the slider 66 from the front position to the rear position. The valve rod 67 retracted together with the slider 66 opens the safety valve 62 and the main valve 63, and fuel gas is supplied to the stove burner 31 and the upper grill burner 29. Further, when the slider 66 is retracted, the instrument plug switch is turned on, the power supply to the control unit is turned on, and the control unit starts operation as described later.

When the point fire extinguishing button 14 is pushed and heating is started, a desired heating power can be obtained by operating the heating power adjusting lever 15. When the heating power adjusting lever 15 of the stove portion 2a provided with the left stove burner 31 is operated to ignite by operating the operating portion of the stove portion 2a, the thermal power is moved to the medium thermal power side in conjunction with the operation of the operating portion. It is designed to move and has a medium firepower when ignited.

When the sliders 66 of all the point fire extinguishing buttons 14 are set to the front positions, the main valve 63 closes to extinguish the fire, the appliance plug switch turns off, the safety valve 62 closes, and the output of the power retention signal stops to stop the control unit. Power supply to is completed.

In this embodiment, in order to eliminate the child lock that mechanically blocks the ignition operation of the point fire extinguishing button 14, the structure is simplified, and the cost is reduced, the configuration is as follows.

That is, in this embodiment, the ignition operation of the point fire extinguishing button 14 is not mechanically blocked, but the control unit performs the ignition operation of the point fire extinguishing button 14 when the child lock mode is set. Then, a child lock mode is executed in which the latch-type solenoid valves LB1 and LB2 are held in the closed state to cut off the supply of fuel gas to the burners 31 and 29, whereby the burners 31 and 29 are prevented from igniting. I have to.

Therefore, as described above, the cooking setting unit 7 is provided with a child lock switch 90 as a child lock mode setting operation unit for setting the child lock mode.

To set this child lock mode, press and hold the child lock switch 90 for, for example, 3 seconds or longer.

FIG. 7 is a circuit diagram of a main part for explaining the supply of power to the microcomputer as the control unit, the setting operation of the child lock mode, and the like.

In FIG. 7, 17, 18 and 19 are the appliance plug switches for the grill, the left stove and the right stove, and the appliance plug switches 17, 18 and 19 are the point fire extinguishing buttons 14b, 14a and 14c. It turns on and off as described above according to each operation of.

Of the instrument plug switches 17 to 18, for example, when the point fire extinguishing button 14c for the right stove is pressed and the instrument plug switch 19 is turned on, the instrument plug switch 19, the diode D3, and the resistor R4 are transmitted from the power supply unit 32. , A current flows through the resistor R5, the base potential of the second transistor Q2 becomes high, and the second transistor Q2 turns on.

When the second transistor Q2 is turned on, the base potential of the first transistor Q1 to which the base is connected to the second transistor Q2 via the resistor R6 is lowered and the first transistor Q1 is turned on, thereby turning on the power supply unit. Power is supplied from 32 to the power input terminal of the microcomputer 33 via the collector-emitter of the first transistor Q1, and the microcomputer 33 is started. That is, power is supplied to the microcomputer 33 in response to the pressing operation of the point fire extinguishing button 14.

The microcomputer 33 functions as the above-mentioned control unit. Further, the microcomputer 33 stores in the storage element 92 whether or not the child lock mode is set based on the operation of the child lock switch 90 of the cooking setting unit 7, and when the child lock mode is set, the child lock mode is set. To execute. The storage element 90 is composed of, for example, a rewritable non-volatile memory.

The first transistor Q1 constitutes a switch means for supplying and shutting off power to the microcomputer 33.

When the instrument plug switch 19 is turned on as described above, a current flows from the power supply unit 32 to the ground via the instrument plug switch 19 and the resistor R3, and the potential of the right stove input terminal of the microcomputer 33 becomes high level. The microcomputer 33 can recognize the ignition operation of the point fire extinguishing button 14c for the right stove, and when the child lock mode is not set, the burner 31 of the right stove is ignited to start heating.

When the power is supplied from the power supply unit 32 and the microcomputer 33 is started, the microcomputer 33 outputs a high-level power supply holding signal from the output terminal. This output terminal is connected to the base of the third transistor Q3 via the diode D4 and the resistor R8, and the base of the third transistor Q3 is grounded via the resistor R9. Further, the base of the third transistor Q3 is also connected to the power supply unit 32 via the collector-emitter of the fourth transistor Q4.

Therefore, when the high-level power supply holding signal is output from the output terminal of the microcomputer 33 as described above, the base potential of the third transistor Q3 becomes high and the third transistor Q3 is turned on. When the third transistor Q3 is turned on, the first transistor Q1 is turned on even if the second transistor Q2 is turned off. That is, the power supply state to the microcomputer 33 is maintained.

Even if all the appliance plug switches 17 to 19 are turned off, the microcomputer 33 can output a power supply holding signal for a certain period of time to maintain the power supply state and perform necessary processing. The microcomputer 33 stops the output of the power supply holding signal after all the instrument plug switches 17 to 19 are turned off and the certain period elapses, whereby the third transistor Q3 is turned off and the first transistor Q1 is further turned off. Is turned off and the power supply to the microcomputer 33 is cut off.

In the above, the case where the point fire extinguishing button 14c for the right stove is pushed and the appliance plug switch 19 is turned on has been described, but the point fire extinguishing button 14b for the grill is pushed and the appliance plug switch 17 is turned on. The same applies when the state is reached and when the point fire extinguishing button 14a for the left stove is pressed and the appliance plug switch 18 is turned on.

In the present embodiment, as described above, the child lock switch 90 is provided in the cooking setting unit 7, and the child lock switch 90 is in the off state when the cooking setting unit 7 is not pressed.

Next, when the user presses and holds the child lock switch 90 for 3 seconds or longer to set the child lock mode after the gas stove 1 has been used, the child lock switch 90 is turned on for 3 seconds or longer. Become.

When the child lock switch 90 is turned on, a current flows from the power supply unit 32 via the resistor R10, the resistor R11, the resistor R13, and the child lock switch 90. As a result, the base potential of the fourth transistor Q4 in which the base emitter is connected to the resistor R10 is lowered, and the fourth transistor Q4 is turned on. Since the fourth transistor Q4 is connected to the base of the third transistor Q3 via the resistor R7, when the fourth transistor Q4 is turned on, the power supply unit 32 passes through the fourth transistor Q4, the resistor R7, and the resistor R9. As the current flows, the base potential of the third transistor Q3 becomes high, and the third transistor Q3 turns on. When the third transistor Q3 is turned on, the base potential of the first transistor Q1 whose base is connected to the collector of the third transistor Q3 via the resistor R6 drops and turns on, and the first transistor Q1 is turned on from the power supply unit 32. Power is supplied to the power input terminal of the microcomputer 33 via the collector-emitter of the microcomputer 33, and the microcomputer 33 starts operation. That is, power is supplied to the microcomputer 33 in response to the pressing operation of the child lock switch 90.

When the child lock switch 90 is turned on, the child lock mode switch (SW) input terminal of the microcomputer 33 changes to the anode-cathode potential of the diode D5, that is, the low level potential. As a result, the microcomputer 33 recognizes that the child lock switch 90 has been long-pressed due to the activation of the first transistor Q1 and stores the storage element 92 in that the child mode has been set. Perform child lock mode.

That is, during the child lock mode, the microcomputer 33 holds the latch-type solenoid valve LB1 and the latch-type solenoid valve LB2 in the closed state, and shuts off the supply of fuel gas to the burners 31 and 29. As a result, in the child lock mode, the stove burner 31 and the upper grill burner 29 do not ignite even if the point fire extinguishing buttons 14b, 14a, 14c are ignited.

Therefore, for example, when a child carelessly presses the point fire extinguishing button 14c for the gas stove 1 in an unused state, for example, the right stove, during the child lock mode, the instrument plug switch 19 is turned on. As described above, the power is supplied to the microcomputer 33 and the microcomputer 33 is started. However, since the microcomputer 33 reads the stored contents from the storage element 92 and the child lock mode is set, the child lock mode is set. Execute and hold the latch type solenoid valve LB1 and the latch type solenoid valve LB2 in the closed state. As a result, the ignition of the stove burner 31 is prohibited.

In this embodiment, when the child lock mode is released, the child lock switch 90 is pressed and held for 3 seconds or longer, as in the case of setting the child lock mode.

As described above, in the present embodiment, when the child lock switch 90 is operated to set the child lock mode, the latch type solenoid valves LB1 and LB2 are operated even if the point fire extinguishing button 14 is subsequently pressed, that is, the ignition operation is performed. Is held in the closed state to shut off the supply of fuel gas, and the ignition of the burners 31 and 29 is prohibited.

Therefore, a regulating member that regulates the pressing operation of the point fire extinguishing button in response to a knob such as a sliding lock lever such as a child lock that mechanically prevents the pressing operation of the point fire extinguishing button or a sliding operation of the lock lever, etc. The structure is simplified, and complicated assembly, adjustment, etc. are not required, and the cost can be reduced.

Further, it is not necessary to arrange the knob of the lock lever or the like in the restricted area near the point fire extinguishing button, and the touch-type child lock switch or the like may be provided at a desired position, which improves the degree of freedom in design design. do.

In the above embodiment, for all the burners 31, 31 and 29, the point fire extinguishing button is operated by executing the child lock mode under the control of the microcomputer 33, instead of the child lock that mechanically blocks the ignition operation of the point fire extinguishing button 14. Although the ignition operation is disabled, as another embodiment of the invention, some burners may be a child lock that mechanically blocks the ignition operation of the point fire extinguishing button 14.

FIG. 8 is a front view of a gas stove according to another embodiment of the present invention.

The gas stove 101 of this embodiment includes two stove portions 102a and a grill portion 102b, and a point fire extinguishing button 114a for the left stove burner 131 is arranged on the left side of the front surface and on the right side of the front surface. Is provided with a point fire extinguishing button 114c for the stove burner 131 on the right side and a point fire extinguishing button 114b for the grill burner. A battery case 113 is arranged adjacent to the point fire extinguishing button 114a on the left side of the front surface.

On the front surface of the gas stove 101, above the fire extinguishing buttons 114a, 114c, 114b at each point, the thermal power adjusting levers 115a, 115c for adjusting the thermal power of the stove burners 131, 131 and the grill burner of the grill portion 102b (not shown). A thermal power adjusting lever 115b for adjusting the thermal power of the stove is provided.

In the gas stove 101 of this embodiment, the left stove burner 131 executes the child lock mode under the control of the microcomputer when the child lock mode is set, while the right stove burner 131 and the right stove burner 131 The grill burner performs a child lock that mechanically blocks the ignition operation of the point fire extinguishing buttons 114c and 114b.

Therefore, a child lock lever 110 as a child lock operation unit that can be slidably operated is arranged at an intermediate position below the two point fire extinguishing buttons 114b and 114c on the right side of the front surface. As shown in FIG. 8, when the lock position is set by sliding to the left, the pressing operation of the point fire extinguishing buttons 114b and 114c, that is, the ignition operation is restricted, and when the lock operation is performed by sliding to the right, the lock position is set. The restriction on the pressing operation of the point fire extinguishing buttons 114b and 114c, that is, the ignition operation is released, and the ignition operation becomes possible.

On the other hand, the point fire extinguishing button 114a on the left side is not provided with a child lock lever because it is not a child lock that mechanically blocks the ignition operation.

In this embodiment, the child lock switch 90 as in the above embodiment is not provided, and the setting of the child lock mode for the left point fire extinguishing button 114a and the cancellation of the setting are performed by the right point fire extinguishing buttons 114c and 114b. This is done by the child lock lever 110.

That is, when the child lock lever 110 is slid to the left to the lock position, the child lock mode for the point fire extinguishing button 114a on the left side is set, and the child lock lever 110 is slid to the right to the unlock position. Then, the setting of the child lock mode for the point fire extinguishing button 114a on the left side is canceled.

That is, the child lock lever 110 attached to the right point fire extinguishing buttons 114c and 114b is also used as the child lock mode setting operation unit for setting and releasing the child lock mode of the left point fire extinguishing button 114a.

In this way, in order to use the child lock lever 110 as the child lock mode setting operation unit for setting and releasing the child lock mode of the point fire extinguishing button 114a on the left side, the operation position of the child lock lever 110 is the above-mentioned lock. It is configured to detect whether it is in the position or the unlock position and input the detection output to the microcomputer as the control unit.

FIG. 9 is a perspective view showing a main part on the back side of the point fire extinguishing buttons 114b and 114c when the child lock lever 110 is in the unlocked position, and FIG. 10 is a perspective view when the child lock lever 10 is in the locked position. It is a perspective view which shows the main part on the back side of the point fire extinguishing buttons 114b, 114c.

In this embodiment, a regulating member 116 as a regulating means capable of sliding movement in the left-right direction is arranged in the front-rear movement locus of the lower back surface of the point fire extinguishing buttons 114b and 114c.

The child lock lever 110 that is operably exposed on the front surface of the stove extends from the regulating member 116. By the sliding operation of the child lock lever 110, the locking member 116 integrated with the child lock lever 110 does not hinder the backward movement of the point fire extinguishing buttons 114b and 114c. It is a lock position that restricts the backward movement of the fire extinguishing buttons 114b and 114c.

A pair of contact restricting portions 117 and 117 corresponding to the lower ends of the fire extinguishing buttons 114b and 114c at each point are projected above the restricting member 116 which can slide and move in the left-right direction, which is the operating direction of the child lock lever 110. ing. On the other hand, recesses 118 and 118 opened rearward are formed at the lower ends of the point fire extinguishing buttons 14b and 14c, respectively.

In the unlocked state where the child lock lever 110 extended from the regulating member 116 is in the unlocked position, as shown in FIG. 9, the recesses 118 and 118 of the two-point fire extinguishing buttons 114b and 114c are in contact with the regulating member 116. It is located at a position facing the contact control portions 117 and 117, respectively. In this unlocked state, the recesses 118 and 118 of the two-point fire extinguishing buttons 114b and 114c face the contact restricting portions 117 and 117, respectively, so that the contact restricting portions 117 and 117 of the regulating member 116 abut each other. It can be pushed in greatly without being restricted, and each can be ignited.

On the other hand, in the locked state in which the child lock lever 110 extending from the regulating member 116 is in the locked position, as shown in FIG. It is located close to the lower end of 114c. In this state, the two-point fire extinguishing buttons 114b and 114c are in a locked state in which the pushing operation is restricted to the restricted position by the contact between the contact restricting portions 117 and 117 of the regulating member 116 and the point fire extinguishing buttons 114b and 114c. It becomes.

As described above, for the point fire extinguishing buttons 114b and 114c on the right side, the ignition operation of the point fire extinguishing buttons 114b and 114c is mechanically performed by the contact restricting portions 117 and 117 of the regulating member 116 that are interlocked by the sliding operation of the child lock lever 110. Perform a child lock to prevent.

In this embodiment, the child lock mode for the left point fire extinguishing button 114a is set and released by the child lock lever 110. Therefore, as described above, the operation position of the child lock lever 110 is detected and the microcomputer as the control unit is used. I try to enter in.

Specifically, in order to detect the operation position of the child lock lever 110, as shown in FIGS. 9 and 10, a micro as an operation position detection unit that can be slidably contacted with the rear end surface 116a of the regulation member 116. A switch 119 is arranged.

As shown in FIG. 10, the movable portion 119a of the microswitch 119 is pushed by the end surface 116a of the regulating member 116 in the locked position to turn on the contact, and the microswitch 119 is regulated at the unlocked position shown in FIG. The push-in by the member 116 is released and the contact is turned off.

That is, the microswitch 119 has contacts on when the child lock lever 110 is in the locked position and off when the child lock lever 110 is in the unlocked position.

FIG. 11 is a circuit diagram corresponding to FIG. 7, and the corresponding portions are designated by the same reference numerals.

117, 118, and 119 are appliance plug switches for the grill, the left stove, and the right stove. In the device plug switch 117 for the grill and the device plug switch 119 for the right stove, in the locked state where the child lock lever 110 is in the locked position, the pushing operation of the point fire extinguishing buttons 114b and 114c is mechanically blocked as described above. Therefore, it does not turn on, and in the unlocked state where the child lock lever 110 is in the unlocked position, it turns on and off according to the operation of the point fire extinguishing buttons 114b and 114c, respectively.

In this embodiment, a series circuit of the resistor R15 and the above-mentioned microswitch 119 is provided between the power input line of the microcomputer 133 and the ground (GND), and the connection portion between the resistor R15 and the microswitch 119 is formed. It is connected to the lock lever operation state detection switch (SW) input terminal of the microcomputer 133.

After the use of the gas stove 1 is finished, when the child lock lever 110 is operated to the locked position to set the locked state, that is, the child lock mode, the point fire extinguishing switch 114a for the left stove is inadvertently operated by a child or the like. The operation when it is done will be described.

When a child or the like carelessly presses the point fire extinguishing button 114a for the left stove in the locked state to turn on the appliance plug switch 118, power is supplied to the microcomputer 133 as in the embodiment of FIG. Then, the microcomputer 133 is started.

That is, when the instrument plug switch 118 is turned on, a current flows from the power supply unit 32 through the instrument plug switch 118, the diode D2, the resistor R4, and the resistor R5, and the base potential of the second transistor Q2 becomes high, so that the second transistor Q2 becomes the first. 2 Transistor Q2 turns on.

When the second transistor Q2 is turned on, the base potential of the first transistor Q1 to which the base is connected to the second transistor Q2 via the resistor R6 is lowered and the first transistor Q1 is turned on, thereby turning on the power supply unit. Power is supplied from 32 to the power input terminal of the microcomputer 133 via the collector-emitter of the first transistor Q1, and the microcomputer 133 is started.

At this time, the lock lever operation state detection switch (SW) input terminal of the microcomputer 133 is at a low level because the micro switch 119 is on. As a result, the microcomputer 133 recognizes that the child lock lever 110 is in the locked state and holds the latch type solenoid valve LB1 and the latch type solenoid valve LB2 in the closed state. As a result, even if the point fire extinguishing button 114a of the left stove is ignited, the left stove burner 131 does not ignite.

When the child lock lever 110 is in the unlocked position and the micro switch 119 is off, the lock lever operation state detection switch (SW) input terminal of the microcomputer 133 becomes a high level, and the microcomputer 133 locks the child. Recognizing that the lever 110 is in the unlocked state at the unlocked position, the latch-type solenoid valve LB1 and the latch-type solenoid valve LB2 are released from the closed state, and the left control burner 131 ignites.

Other configurations are the same as those in the above embodiment.

In this embodiment, the left stove burner 131 does not mechanically block the ignition operation of the point fire extinguishing button 114a, but executes the child lock mode under the control of the microcomputer 133. Therefore, the point of the left stove burner 131. It is not necessary to provide a regulating member or the like for restricting the pressing operation of the fire extinguishing button 114a, and the structure is simplified accordingly.

Further, with respect to the left stove burner 131, the child lock mode is set and released by the child lock lever 110 of the right stove burner 131 and the grill burner, so that it is not necessary to separately provide a child lock mode setting operation unit.

In this embodiment, the ignition operation of the point fire extinguishing buttons 114c and 114b is mechanically blocked for the right stove burner 131 and the grill burner, but as another embodiment of the present invention, for example, the right stove burner 131 is Similar to the stove burner 131 on the left side, the child lock mode may be executed under the control of the microcomputer 133, and the ignition operation of the point fire extinguishing button 114b may be mechanically blocked only for the grill burner. In this case, a child lock lever only for the point fire extinguishing button 114b of the grill burner may be provided, and a regulating member for restricting the ignition operation only for the point fire extinguishing button 114b may be provided. Further, the operation position of the child lock lever of the point fire extinguishing button 114b of the grill burner may be detected, and the child lock modes of the left and right stove burners 131 and 131 may be executed and released.

As still another embodiment of the present invention, the grill burner may also execute the child lock mode under the control of the microcomputer 133 in the same manner as the left and right stove burners 131, 131, and the mechanical child lock may be eliminated. In this case, the child lock mode can be set and released at the set position and the release position, for example, a slide switch or the like is provided, and the microcomputer 133 sets the child lock mode by the contact output of the slide switch or the like. You may try to judge whether or not it is.

[Other Embodiments]
(1) In the above embodiment, the child lock switch 90 is provided in the cooking setting unit 7, but may be provided at another position. Further, another switch may be used as the child lock switch without providing the dedicated child lock switch. For example, the plus key 71a and the minus key 71b of the timer input unit 71 shown in FIG. 2 may be operated at the same time for a certain period of time to set and cancel the child lock mode.

(2) In the above embodiment, the operating position of the child lock lever 110 is detected by the micro switch 119, but the movement is not limited to the micro switch, and an optical sensor such as a photomicro sensor that optically detects the movement of the regulating member 116. May be used.

(3) By the way, in the gas stove, for example, the state of cooked rice in the rice cooking mode, or various settings related to heating by the burner such as the time for setting the fire extinguishing function for forgetting to turn off the stove are set to the initial values at the time of shipment from the factory. It is equipped with an operation mode that can be changed according to the user's preference and usability, a so-called customize mode.

When changing the setting contents by such a customization mode, it is necessary to first make the gas stove not in use, and then supply power to the control unit to start the customization mode.

In a model that is not provided with a power switch as in the above embodiment and supplies power to the control unit by igniting a point fire extinguishing switch that is a heating / stopping operation unit, in order to start the customized mode, It is necessary to ignite the point fire extinguishing switch. Therefore, even in the customized mode in which it is not necessary to ignite the burner, the burner is once ignited as in the ignition operation in the normal operation mode, and then the control unit recognizes that the burner is in the customized mode and the burner is extinguished. Or, the user himself extinguishes the burner.

In such a model in which the point fire extinguishing switch, which is a heating / stopping operation unit, is ignited to supply power to the control unit, an unnecessary ignition operation such as igniting once and then extinguishing the fire is required in order to execute the customized mode. It will be done and energy will be wasted.

In the embodiment shown in FIG. 7, power can be supplied to the microcomputer 33 by operating the child lock switch 90 without operating the point fire extinguishing switch. Therefore, the child lock switch 90 can be used as a switch for starting the customize mode. It may be combined. For example, when the child lock switch 90 is pressed and held for a long time and another switch is operated at the same time, the microcomputer 33 may start the customize mode, assuming that the customize mode is set.

This eliminates the need to ignite the burner to start the customized mode and wastes energy.

(4) In the above embodiment, the operation for setting the child lock mode and the operation for canceling the setting are the same operation, but may be different operations.

1,101 Gas stove 14,114 points Fire extinguishing button (heating / stopping operation unit)
29 Upper grill burner 31,131 stove burner 32 Power supply unit 33,133 Microcomputer (control unit)
90 Child lock switch (Child lock mode setting operation unit)
92 Memory element (storage unit)
110 Child lock lever (Child lock operation unit)
116 Regulatory members (regulatory means)
119 Micro switch (operation position detector)
LB1, LB2 Latch type solenoid valve (open / close valve)

Claims (3)

A burner for heating the object to be heated, a heating / stopping operation unit operated to command the start and stop of heating by the burner, and a gas flow path for supplying fuel gas to the burner are provided. An on-off valve that opens and closes the gas flow path to supply and shut off fuel gas to the burner, controls the on-off valve, and starts heating the burner based on the operation of the heating / stopping operation unit. A gas cooker including a control unit for controlling the stop of heating and starting to supply power to the control unit in response to an operation of a heating start command by the heating / stopping operation unit.
When the child lock mode is set, the control unit closes the on-off valve when the power supply is started in response to the operation of the heating start command by the heating / stop operation unit. To shut off the supply of fuel gas to the burner .
The child lock mode setting operation unit operated to set the child lock mode,
A switch means for supplying and shutting off power to the control unit,
The child lock mode setting operation unit is provided with a storage unit for storing whether or not the child lock mode is set by operating the operation unit.
The switch means starts supplying power to the control unit in response to the operation of the heating start command by the heating / stop operation unit, and responds to the operation of the child lock mode setting operation unit. It starts supplying power to the control unit.
When it is determined that the child lock mode is set based on the stored contents of the storage unit, the control unit responds to the operation of the heating start command by the heating / stopping operation unit, and said the above. When the power supply is started, the on-off valve is held in the closed state to shut off the supply of fuel gas to the burner.
A gas cooker that features that. Fuel gas is supplied to a plurality of burners for heating the object to be heated, a plurality of heating / stopping operation units operated to command the start and stop of heating by the plurality of burners, and the plurality of burners. A plurality of on-off valves provided in the gas flow path that open and close the gas flow path to supply and shut off fuel gas to the burner, and the plurality of on-off valves are controlled, and the plurality of heating / stopping are performed. The control unit is provided with a control unit that controls the start and stop of heating of the plurality of burners based on the operation of the operation unit, and responds to the operation of the heating start command by the heating / stop operation unit to the control unit. It is a gas cooker that starts supplying power to
A child lock operation unit that is switched between a lock position for restricting the operation of some of the heating / stop operation units and an unlock position for releasing the regulation among the plurality of heating / stop operation units.
In conjunction with the switching operation of the child lock operation unit, when the child lock operation unit is in the lock position, the operation position for the heating start command by the partial heating / stop operation unit is set to the burner. While restricting to a regulated position that prohibits the start of heating, when the child lock operating unit is in the unlocked position, a regulating means for releasing the regulation of the operating position for the heating start command and a regulating means.
The child lock operation unit includes an operation position detection unit that detects whether the child lock operation unit is in the lock position or the unlock position.
Based on the detection output of the operation position detection unit, the control unit determines that the child lock mode is set when the child lock operation unit is determined to be in the lock position, and the plurality of heating units are heated. / When the power supply is started in response to the operation of the heating start command by the remaining heating / stopping operation unit other than the partial heating / stopping operation unit, the on-off valve To shut off the supply of fuel gas to the burner.
A gas cooker that features that. The plurality of burners include a stove burner and a grill burner.
The partial heating / stopping operation unit is a heating / stopping operation unit corresponding to the grill burner.
The gas cooker according to claim 2.

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