JP5204196B2 - Gas stove - Google Patents

Description

  The present invention relates to a gas stove having a function of not igniting a gas burner when a cooking container is not disposed at the time of ignition operation in a gas stove provided with a manual open / close type appliance plug.

  Conventionally, some gas stoves have a cooking container detection function that does not ignite a gas burner when a cooking container such as a pan is not disposed during ignition operation (Patent Document 1). This gas stove is equipped with a manual open / close instrument plug, and because of the mechanical structure of the instrument plug, the instrument plug is manually opened by ignition operation and gas is supplied to the gas burner. A valve closing means (latch type solenoid valve, etc.) is provided in the gas passage, etc., and when the ignition container detects that there is no cooking container on the gas burner by the cooking container detection means, the gas supply is shut off and the gas burner is ignited. In order to prevent this, the valve closing means is controlled to be closed.

  Some gas stoves have a ventilation fan interlocking function that activates a ventilator by transmitting an infrared signal (Patent Document 2). This gas stove is provided with infrared signal transmitting means, and during the ignition operation, the infrared signal is transmitted from the front of the gas stove by the infrared signal transmitting means and reflected to the user, and the reflected infrared signal is received by the ventilator. Ventilation operation is started.

JP 2010-139189 A JP 2006-78144 A

  By the way, in the gas stove provided with the cooking container detection function, it is conceivable to enhance the function of the gas stove by providing the ventilation fan interlocking function. In this case, in order to suppress the load on the power source, it is preferable not to execute the cooking container detection function and the ventilation fan interlocking function at the same time during the ignition operation. In particular, when using a battery as a power source, in order to extend the battery life and prevent the operation of the control unit from becoming unstable due to power reduction, the cooking container detection function and the ventilation fan are linked so that the load output does not overlap. The functions are preferably performed sequentially. Further, since the ventilation fan interlocking function reflects and reflects an infrared signal to the user, it is preferable to transmit the infrared signal at the initial stage of the ignition operation in which the user is surely in front of the gas stove.

  Therefore, in consideration of the above, when adding a ventilation fan interlocking function to a gas stove with a cooking vessel detection function, the operation control first outputs an infrared signal for operating the ventilator during the ignition operation, When the presence or absence of a cooking container is detected and there is no cooking container, it is conceivable to perform valve closing control on the valve closing means.

  However, in the case of this operation control, the operation of the cooking container detection function waits until the output of the infrared signal is completed, so that the valve closing operation of the valve closing means during the ignition operation is delayed. Therefore, when the ignition operation is performed without the cooking container, the valve closing means may be closed after the manual opening / closing valve is manually opened, and in that case, until the valve closing means is closed. During this period, raw gas may be released, causing the user to feel unpleasant such as a gas odor, or may cause a dangerous event due to a direct fire in the absence of a cooking container due to a momentary fire on the released raw gas. .

  The present invention has been made in view of the above circumstances, and even if a ventilating fan interlocking function is added to a gas stove having a manual open / close type appliance stopper and having a cooking container detection function, the cooking container detection function is hindered. It is an object of the present invention to provide a gas stove that suppresses the release of raw gas when an ignition operation is performed without a cooking container.

The gas stove according to the present invention is
In a gas stove installed in a gas passage for supplying a gas plug to a gas burner with a manual opening / closing valve that is manually opened during a gas burner ignition operation and manually closed during a fire extinguishing operation,
Cooking container detection means for detecting the presence or absence of a cooking container on the gas burner;
A valve closing means for shutting off the gas supply to the gas burner provided in the gas passage or the instrument plug;
An infrared signal transmitting means for transmitting an infrared signal as a command to start or stop the ventilation operation by receiving the ventilation device;
An ignition control unit for controlling the operation during the ignition operation;
A fire extinguishing control unit that controls the operation during the fire fighting operation,
Power supply means for supplying power from a power source to each part of the gas stove,
When a fire extinguishing operation is performed to manually close the manual opening / closing valve of the appliance plug, the fire extinguishing control unit issues a valve closing command for closing the valve closing means and turns off the power supply by the power supply means. Control
The ignition control unit is an infrared output for outputting an infrared signal for starting ventilation operation from the infrared signal transmitting means when an ignition operation for manually opening the manual opening / closing valve of the appliance plug is started and power is supplied from the power source. After that, when the presence of the cooking container is detected by the cooking container detection means, a valve opening instruction for opening the valve closing means is performed, and when the absence of the cooking container is detected, the valve opening instruction is issued. The valve closing means is held in the closed state during the fire extinguishing operation without performing the control so that the gas supply to the gas burner is shut off and is not ignited.

  With the above configuration, the fire extinguishing control unit issues a valve closing command during the fire extinguishing operation to close the valve closing means, so that the valve closing means is in the closed state during the next ignition operation. Then, the ignition control unit keeps the valve closing state of the valve closing means without issuing the valve opening command when the absence of the cooking container is detected during the ignition operation. Therefore, even if the cooking container detection function is activated after the output of the infrared signal for starting the ventilation operation during the ignition operation, if the ignition operation is performed without the cooking container, the valve closing means is not changed from the previous fire extinguishing operation. Since the valve is kept closed, no raw gas is released from the gas burner. When the ignition operation is performed in a state where there is a cooking container, a valve opening command is issued after the infrared signal is output to open the valve closing means, so that gas can be supplied to the gas burner for ignition.

  Further, during the ignition operation, the output of the infrared signal to the ventilator and the valve opening command to the valve closing means do not overlap, so that a large load is not applied to the power supply at one time. Therefore, when the battery is used as a power source, the battery consumption can be suppressed and the battery life can be extended, and the operation of the ignition control unit does not become unstable as the power decreases.

  Also, since the output of the infrared signal is performed at the beginning of the ignition operation, the infrared signal is reflected and reflected to the user who is surely in front of the gas stove for the ignition operation, so that the ventilation device can be operated reliably. it can.

In the above gas stove,
The gas passage or appliance plug is provided with a gas amount adjusting means for limiting the total gas supply amount to the gas burner to a small amount,
The fire extinguishing control unit controls to perform a valve closing command for closing the gas amount adjusting means,
The ignition control unit desirably performs control so as to issue a valve closing command to the valve closing means when the absence of the cooking container is detected.

  As a result, the gas amount adjusting means is closed during the fire extinguishing operation by the fire extinguishing control unit, so that the gas amount adjusting means is closed during the next ignition operation. Therefore, when the ignition operation is performed without a cooking container, if the valve closing means is open for some reason, the manual opening / closing valve is manually opened before the valve closing means is closed. Even so, since the gas amount adjusting means is closed, it is possible to minimize the release of raw gas until the valve closing means is closed.

  As described above, according to the gas stove according to the present invention, even when the cooking container detection function is activated after the output of the infrared signal for starting the ventilation operation during the ignition operation, the ignition operation is performed without the cooking container. When performed, the release of raw gas from the gas burner is suppressed, so that it is possible to avoid unpleasant feelings such as gas odors and dangerous events due to direct fire in the absence of a cooking container. Therefore, even in a gas stove provided with a manually openable / closable appliance plug, the function of the gas stove can be enhanced by providing a function of interlocking with a ventilation fan without hindering the cooking container detection function.

It is a front view which shows the external appearance structure of the gas stove by embodiment, and the external appearance structure of an upper ventilation apparatus. It is a schematic diagram explaining the operation | movement at the time of detecting the presence or absence of a cooking container by a cooking container detection means. It is a schematic diagram which shows the gas circuit structure by an instrument stopper and a gas cutoff valve (valve closing means). It is a schematic diagram which shows a mode that the infrared signal transmitted from the gas stove reflects to a user and goes to an upper ventilator. It is a block diagram for showing the command relation by a control means. It is a flowchart which shows the operation | movement flow at the time of fire extinguishing operation. It is a flowchart which shows the operation | movement flow at the time of ignition operation.

  The gas stove according to the present embodiment supplies and shuts off the gas to the gas burner by means of a manually openable / closable instrument plug, and does not ignite the gas burner when there is no cooking container on the gas burner during the ignition operation. A function (cooking container detection function) and a function (ventilator fan interlocking function) for starting or stopping the operation of a ventilator installed above in accordance with the point-extinguishing operation.

  As shown in FIG. 1, the gas stove 1 has a rectangular box-like stove main body 10, and a two-port (plurality) stove in which the gas burner 11 faces the top plate on the top surface of the stove main body 10 and the five virtues 12 are arranged. A portion 13 is provided. A cooking container temperature sensor 14 is provided at the center of each stove 13 for detecting the cooking container bottom temperature by contacting the bottom of the cooking container A such as a pan.

  As shown in FIG. 2, the cooking vessel temperature sensor 14 is supported so as to be movable up and down, and a switch means 15 such as a micro switch for detecting the raising and lowering state of the cooking vessel temperature sensor 14 is provided at the base end. ing. The switch means 15 constitutes a cooking container detection means for detecting the presence or absence of the cooking container A on the gas burner 11. That is, the switch means 15 is turned off when the cooking container temperature sensor 14 is in the raised position when the cooking container A is not on the virtues 12 (see FIG. 2A) and the cooking container A is on the virtues 12. Is turned on when the cooking container temperature sensor 14 is in the lowered position (see FIG. 2B). Therefore, the presence or absence of the cooking container A on the gas burner 11 is detected from the on / off signal of the switch means 15. A flame detector 11 a for detecting the presence or absence of a flame in the gas burner 11 and an ignition electrode 11 b for igniting the gas burner 11 by spark discharge are arranged on the outer periphery of each gas burner 11.

  Referring again to FIG. 1, on the front portion of the stove body 10, the fire extinguishing button 3 for the operation to extinguish the gas burner 11 of each stove part 13 and the heating power adjustment of the gas burner 11 of each stove part 13 are performed. A thermal power adjustment lever 4 is provided. In addition, a battery box 19 that houses a battery serving as a power source 19 a of the gas stove 11 is installed on the front portion of the stove body 10. The power source 19a of the gas stove 11 may be a commercial power source instead of the battery.

  The point fire extinguishing button 3 and the heating power adjustment lever 4 are connected between the gas pipe and the gas burner 11 and connected to the instrument plug 2 that controls the gas supply from the gas pipe to the gas burner 11. As shown in FIG. 3, the instrument plug 2 is a mechanical instrument plug 2 that is manually opened when an ignition operation is performed with the point fire button 3. The instrument plug 2 is formed with an internal gas passage 23 communicating from the inlet 21 to the outlet 22 in the valve housing 20, and the internal passage 23 has an electromagnetic safety valve 25 and an original gas valve 24 from the upstream side. The needle valve 26 for adjusting the gas amount is accommodated.

  The original gas valve 24 is fixedly attached to a predetermined position of the rod 27, and the electromagnetic safety valve 25 is disposed so as to be pressed at the distal end portion of the rod 27. The base end portion of the rod 27 is opposed to the slider portion 30 of the point fire button 3. The original gas valve 24 and the electromagnetic safety valve 25 are urged toward the valve closing side (the side on which the fire extinguishing button 3 is disposed) by the coil springs 28 and 29. Therefore, in the state where the point fire extinguishing button 3 is in the start position where the pushing operation (ignition operation) is not performed, the original gas valve 24 and the electromagnetic safety valve 25 are in a closed state in contact with the valve seat, and the internal passage 23 is It is closed. When the point-extinguishing button 3 is pushed (ignited), the original gas valve 24 is first opened from the valve seat against the biasing force of the coil spring 28, and then the electromagnetic safety valve 25 is connected to the rod. 27 is pressed against the urging force of the coil spring 29 and separated from the valve seat to be opened. The electromagnetic safety valve 25 has an adsorption piece 25a attached to the rear end thereof, and is held open when the adsorption piece 25a is adsorbed by an electromagnet 25b disposed on the back side. Thereby, the instrument plug 2 is maintained in an open state, and gas flows into the internal passage 23. In the present embodiment, the original gas valve 24 and the electromagnetic safety valve 25 constitute a manual open / close valve that is manually opened when the gas burner 11 is ignited, and both the original gas valve 24 and the electromagnetic safety valve 25 are opened. It is defined that the manual on-off valve is open.

  The needle valve 26 is connected to the heating power adjustment lever 4 via a cam plate 26a. Accordingly, the needle valve 26 is moved forward and backward through the cam plate 26a by the operation of the heating power adjusting lever 4, the flow rate of the gas flowing through the internal passage 23 is adjusted, and the heating power of the gas burner 11 is adjusted.

  Further, the internal passage 23 of the instrument plug 2 is provided with an orifice passage 23a having a narrow passage width and a bypass passage 23b that bypasses the orifice passage 23a, and further a gas amount regulating valve that opens and closes the bypass passage 23b. (Gas amount adjusting means) 6 is provided. The gas amount adjusting valve 6 is closed when the cooking vessel A is withdrawn from the gas burner 11 during combustion of the gas burner 11 and the absence of the cooking vessel is detected by the cooking vessel detection means (switch means 15). Then, in the appliance plug 2, the gas is circulated only through the orifice passage 23 a of the internal passage 23, and the total gas supply amount supplied to the gas burner 11 is reduced to a small amount. As a result, regardless of the heating power setting of the heating power control lever 4, 11 firepower becomes a small fire. Thereby, during the combustion of the gas burner 11, a dangerous event due to a direct fire of a large fire in a state where there is no cooking container can be avoided, and safety is improved. When the presence of the cooking container is detected by the cooking container detection means, the gas amount adjustment valve 6 is opened, and the set heating power at the heating power adjustment lever 4 is restored. Accordingly, when the cooking container A is temporarily lifted by shaking the pan during gas burner combustion, the fire is merely extinguished and is not extinguished. Therefore, there is no inconvenience of reigniting by fire extinguishing, and convenience in use during cooking is good.

  The point-extinguishing button 3 is provided with a heart cam type push-push mechanism comprising a heart-shaped cam groove 31 and an engagement element 32 engaged therewith, and the pressing is released after the point-extinguishing button 3 is pushed to the end position. Then, the fire extinguishing button 3 is locked at the holding position before the starting end position. In the holding position of the point-extinguishing button 3, the original gas valve 24 is held open, while the electromagnetic safety valve 25 is released from being pressed by the rod 27, but the attracting piece 25a is attracted and held by the electromagnet 25b against the coil spring 29. Is held open.

  A cam 33 is fixed to the point fire extinguishing button 3, and a micro switch 5 that is turned on and off by the cam 33 is disposed in the vicinity of the cam 33. The micro switch 5 constitutes a position detecting means for detecting the manual operation position from the start end position to the end position of the point extinguishing button 3 in two stages. The microswitch 5 is a two-contact type having two independent contacts inside, and includes a movable piece 51 that comes into contact with the surface of the cam 33, and the point-extinguishing button 3 is pushed to move the movable piece 51 to the intermediate position. When pushed, the first contact is turned on, and when the fire extinguishing button 3 is pushed further and the movable piece 51 is pushed further, the second contact is turned on. The first-stage manual operation position at which the first contact is turned on is set to a position near the opening and closing of the original gas valve 24, and the second-stage manual operation position at which the second contact is turned on is an electromagnetic position. It is set at a position near the opening and closing of the safety valve 25. When the first contact is turned on, the power is turned on. When the second contact is turned on, a high voltage is applied to the igniter 93 and a spark discharge is generated from the ignition electrode 11b. Although the microswitch 5 is a two-contact type, the manual operation position of the fire extinguishing button 3 may be detected in two steps using two single-contact microswitches 5.

  Further, a gas shut-off valve 7 is provided at a position downstream of the instrument plug 2 between the instrument plug 2 and the gas burner 11. This gas shut-off valve 7 constitutes a valve closing means for shutting off the gas passage when there is no cooking container during the ignition operation. The gas shut-off valve 7 is constituted by a latch type electromagnetic valve (self-holding type electromagnetic valve). In the latch type solenoid valve, a plunger 71 is attached to a valve body 73, an electromagnetic coil 75 is arranged around the plunger 71, and an excitation current is applied to the electromagnetic coil 75 to move the plunger 71 by moving the plunger 71. Open and close. In the closed state of the valve body 73, the valve body 73 is urged by the spring 76 so as to close the valve port 72, and the valve body 73 is closed, and in the opened state of the valve body 73, the plunger 71 is moved by the permanent magnet 74. The valve element 73 is held open so as to adsorb and open the valve port 72. Therefore, the latching electromagnetic valve does not require holding power in the valve open state and the valve closed state, so that it is possible to suppress power consumption. Therefore, when using a battery power source, it is possible to prevent early deterioration of performance such as battery life. The gas amount adjusting valve 6 provided in the appliance plug 2 is also constituted by a latch type electromagnetic valve. Like the gas cutoff valve 7, the plunger 61, the valve port 62, the valve body 63, the permanent magnet 64, the electromagnetic coil 65, and the spring 66 are used. Etc.

  Referring again to FIG. 1, an infrared signal transmitting unit (infrared signal transmitting means) 16 that transmits an infrared signal for instructing the start or stop of the operation of the upper ventilation device 8 is provided on the front portion of the stove body 10. Is provided. The infrared signal transmission part 16 is comprised by the light emitting element arrange | positioned in the stove main body 10 located in the back side of the translucent board provided in the front part of the stove main body 10. FIG. And the infrared signal transmission part 16 is provided in two places of right and left of the front part of the stove main body 10, and each infrared signal transmission part 16 is installed in the upper part of each right and left point fire-extinguishing button 3 vicinity. Therefore, as shown in FIG. 4, when the user operates the fire extinguishing button 3, the infrared signal transmitted from the infrared signal transmission unit 16 hits the user and is reflected, and the infrared signal is transmitted to the upper ventilation device 8. Can be reached. In addition, the emission direction of the infrared signal from each infrared signal transmission part 16 is inclined slightly above the horizontal direction (for example, 15 degrees upward) and slightly inclined toward the front center of the gas stove 1. Thereby, the infrared signal transmitted from the infrared signal transmitter 16 can be more reliably applied to the user who performs the ignition operation or the fire extinguishing operation, and can be reflected toward the ventilation device 8.

  The ventilation device 8 includes a fan 82 provided inside, an operation unit 83 installed on the front surface, infrared signal receiving units 81a and 81b installed on the front surface and the back side of the front surface, and a ventilation control unit (not shown). ing. And the ventilation apparatus 8 starts or stops the operation | movement of the fan 82 by a ventilation control part, when the infrared signal transmitted from the infrared signal transmission part 16 of the gas stove 1 is received by infrared signal receiving part 81a, 81b. Controlled.

  As shown in FIG. 5, the gas stove 1 is an electronic unit including a CPU, a memory, and the like, and includes a control unit 9 that is operated by power supply from a power source 19 a such as a battery. The control means 9 includes an ignition control unit 91 that controls the operation during the ignition operation, a fire extinguishing control unit 92 that controls the operation during the fire extinguishing operation, and the like. And the control means 9 is based on the detection signal from the switch means 15, the micro switch 5, the flame detector 11a, etc., the infrared signal transmission part 16, the gas cutoff valve 7, the gas quantity adjustment valve 6, the electromagnetic safety valve 25, the igniter The power supply means 18 for supplying power from the power source 19a to each part such as 93 and each part of the gas stove 1 is controlled.

Next, operation | movement of the gas stove 1 of the above structure is demonstrated.
First, the operation during the fire extinguishing operation of the gas stove 1 by the fire extinguishing control unit 92 will be described.
Referring to the flowchart of FIG. 6, when the point fire extinguishing button 3 is pushed in for a fire extinguishing operation and then the pushing is released and the micro switch 5 detects the first-stage instrument plug manual operation position (S31), the electromagnetic safety valve The current application to the 25 electromagnets 25b is stopped (S32), the electromagnetic safety valve 25 is closed to shut off the internal passage 23 of the instrument plug 2, and the gas supply from the instrument plug 2 to the gas burner 11 is stopped. Thereby, the gas burner 11 is extinguished.

  Next, an infrared output command for stopping the ventilation operation of the ventilation device 8 is performed, and an infrared signal for stopping the ventilation operation is transmitted from the infrared signal transmission unit 16 for a predetermined time T10 (for example, 230 ms) (S33 to S35). Thereby, the infrared signal transmitted from the infrared signal transmission unit 16 at the front of the gas stove 1 hits the user who is performing the fire extinguishing operation and is reflected and received by the ventilation device 8. When the ventilation device 8 receives the infrared signal for stopping the ventilation operation by the receiving units 81a and 81b, the ventilation control unit immediately stops driving the fan 82 by the processing in the ventilation control unit, or the certain period of time has passed. Later, the fan 82 is stopped and the ventilation operation is terminated.

  A valve closing signal for closing the gas shutoff valve 7 is output for a predetermined time T11 (for example, 100 ms) (S36 to S38), and the gas amount adjusting valve 6 of the instrument plug 2 is set to the closed state. A valve closing signal for performing the operation is output for a predetermined time T12 (for example, 100 ms) (S39 to S41). Excitation for operating the plungers 71 and 61 in the valve closing direction of the valve bodies 73 and 63 with respect to the electromagnetic coils 75 and 65 of the latch type electromagnetic valves constituting the gas cutoff valve 7 and the gas amount adjusting valve 6 by the valve closing signals. A current is applied. Thereby, the gas cutoff valve 7 and the gas amount adjusting valve 6 are held in the closed state. Thereafter, the control power supply is shut off (S42), the power supply from the power supply 19a by the power supply means 18 is cut off, and the fire extinguishing operation of the gas burner 11 is ended. As described above, when the gas burner 11 is extinguished, the gas cutoff valve 7 and the gas amount adjusting valve 6 are held in the closed state.

Next, the operation | movement at the time of ignition operation of the gas stove 1 by the said ignition control part 91 is demonstrated.
Referring to the flowchart of FIG. 7, when the point-extinguishing button 3 is pushed in to start the ignition operation, the original gas valve 24 of the appliance plug 2 is opened (S1). When the first position of the instrument plug manual operation position is detected by the micro switch 5 by pressing the point fire extinguishing button 3 (S2), power is supplied from the power source 19a to the control means 9, and this control power source is maintained and the instrument plug 2 An exciting current is applied to the electromagnet 25b of the electromagnetic safety valve 25 (S3).

  Then, an infrared output command for starting the ventilation operation of the ventilation device 8 is performed, and an infrared signal for starting the ventilation operation is transmitted from the infrared signal transmission unit 16 for a predetermined time T1 (for example, 230 ms) (S4 to S6). Thereby, the infrared signal transmitted from the infrared signal transmission unit 16 on the front surface of the gas stove 1 hits the user who performs the ignition operation and is reflected and received by the ventilation device 8. When receiving the infrared signal for starting the ventilation operation by the receiving units 81a and 81b, the ventilation device 8 activates the fan 82 by the processing in the ventilation control unit and starts the ventilation operation.

  After the output of the infrared signal, the cooking container detection means (switch means 15) determines whether or not the cooking container A is disposed on the gas burner 11 (S7). When the presence of the cooking container is detected, a valve opening signal for opening the gas shutoff valve 7 is output for a predetermined time T2 (for example, 100 ms) (S8 to S10). A valve opening signal for opening the gas amount adjusting valve 6 is output for a predetermined time T3 (for example, 100 ms) (S11 to S13). Excitation for operating the plungers 71 and 61 in the valve opening direction of the valve bodies 73 and 63 with respect to the electromagnetic coils 75 and 65 of the latch type electromagnetic valve constituting the gas shutoff valve 7 and the gas amount adjusting valve 6 by the valve opening signals. A current is applied. Thereby, the gas shut-off valve 7 and the gas amount adjusting valve 6 are opened.

  When the electromagnetic safety valve 25 is opened by further pressing the fire extinguishing button 3 before the micro switch 5 detects the second-stage instrument plug manual operation position (S14), the instrument plug 2 is opened. Then, gas is supplied to the gas burner 11 through the gas cutoff valve 7. When the second-stage instrument plug manual operation position is detected by the microswitch 5 (S15), a voltage is applied to the igniter 93 (S16), and the gas burner 11 is ignited by spark discharge from the ignition electrode 11b. When the output voltage of the flame detector 11a that detects the flame of the gas burner 11 becomes equal to or higher than the ignition level (S17), the voltage application to the igniter 93 is stopped (S18). Thereafter, when the pushing of the point fire button 3 is released, the point fire button 3 is held at the holding position, the original gas valve 24 and the electromagnetic safety valve 25 of the instrument plug 2 are held open, and the gas cutoff valve 7 is opened. The combustion of the gas burner 11 is continued. Thus, the ignition operation in the state where the cooking container A is arranged on the gas burner 11 is completed.

On the other hand, if it determines with there being no cooking container A on the gas burner 11 by step S7, the electric current application to the electromagnet 25b of the electromagnetic safety valve 25 will be stopped (S19). As a result, the opening of the electromagnetic safety valve 25 after the pressing of the point-extinguishing button 3 is released is prevented.
When it is detected that there is no cooking container A on the gas burner 11, the valve opening signal is not output to the gas shutoff valve 7 and the gas amount adjusting valve 6, and the gas shutoff valve 7 and The gas amount adjusting valve 6 is kept closed (see S36 to S41 in FIG. 6). Therefore, even if the cooking container detection function is activated after the output of the infrared signal for starting the ventilation operation during the ignition operation, when the ignition operation is performed without the cooking container, the gas shutoff valve 7 from the previous fire extinguishing operation is performed. Is kept in the closed state, the raw gas is not released from the gas burner 11, and the gas burner 11 is not ignited.

  In addition, when there is no said cooking container, you may not make any instruction | command with respect to the gas cutoff valve 7 and the gas quantity control valve 6, but in this embodiment, the cooking container A is on the gas burner 11. If it is determined that there is not, the application of current to the electromagnetic safety valve 25 is stopped, and then a valve closing signal for controlling the closing of the gas shut-off valve 7 is output for a predetermined time T4 (for example, 100 ms) just in case. (S20 to S22). Since the exciting current for operating the plunger 71 in the valve closing direction of the valve element 73 is applied to the electromagnetic coil 75 of the latch type electromagnetic valve constituting the gas cutoff valve 7 by the valve closing signal, the gas cutoff valve is caused for some reason. Even if 7 is open, it is closed. Therefore, when the ignition operation is performed without a cooking container, if the gas shut-off valve 7 is open for some reason, the gas shut-off valve 7 is closed after the infrared signal output (S4 to S6). Even if the original gas valve 24 and the electromagnetic safety valve 26 of the instrument plug 2 are manually opened earlier than before, the gas amount adjusting valve 6 is closed during the previous fire extinguishing operation (see S39 to S41 in FIG. 6). Therefore, it is possible to minimize the release of the raw gas until the gas shut-off valve 7 is closed.

  In this case, the fact that there is no cooking container is notified by a notification means (not shown) such as a buzzer or a display (S23), and then the control power supply is shut off (S24), and the power supply 19a by the power supply means 18 is used. The ignition operation control is terminated by cutting off the power supply from the. This prevents the user from misidentifying that the gas stove 1 is out of order because the gas burner 11 is not ignited even though the fire extinguishing button 3 is operated, and the cooking container A is placed on the gas burner 11. Thus, it is possible to prompt the user that the gas burner 11 needs to be ignited. In this case, since the spark electrode 11b is not subjected to spark discharge, power consumption can be reduced.

  As described above, according to the gas stove 1 of the present embodiment, even when the cooking container detection function is activated after the output of the infrared signal for starting the ventilation operation during the ignition operation, the ignition operation is performed without the cooking container. In this case, since the gas shut-off valve 7 is kept closed since the previous fire extinguishing operation, the release of raw gas from the gas burner 11 is prevented and the gas burner 11 is not ignited. Therefore, it avoids unpleasant feelings such as gas odor and dangerous events caused by direct fire when there is no cooking container A at the time of ignition operation (such as a hand touching a flame or a fire igniting a clothing sleeve). Can improve safety. As a result, even in the gas stove 1 in which the manually openable / closable appliance plug 2 is installed, the function of the gas stove 1 can be enhanced by providing the function of interlocking with the ventilation fan without hindering the cooking container detection function.

Further, at the time of ignition operation and fire extinguishing operation, the output of the infrared signal to the ventilator 8 and the command (valve closing command or valve opening command) to the gas shut-off valve 7 do not overlap, so a large load is applied to the power source 19a at a time. It will not take. Therefore, when the battery is used as the power source 19a, the battery consumption can be suppressed and the battery life can be extended, and the operation of the ignition control unit 91 and the fire extinguishing control unit 92 can become unstable as the power decreases. Absent.
Moreover, since the output of the infrared signal to the ventilator 8 is performed at the initial stage of the ignition operation or the fire extinguishing operation, the infrared signal is applied to the user who is surely in front of the gas stove 1 for the ignition operation or the fire extinguishing operation. The ventilation device 8 can be reliably activated or deactivated.

In addition, this invention is not limited only to the said embodiment, A various change can be performed within the scope of the present invention.
For example, a release button (button indicated by reference numeral 17 in FIG. 1) for releasing the cooking container detection function is provided, and the gas burner 11 is ignited by an ignition operation regardless of the presence or absence of the cooking container A when the release button 17 is turned on. It may be. In this case, when the release button 17 is turned on while the combustion of the gas burner 11 is stopped, the power is temporarily supplied to the control means 9, and S7 is skipped as the operation flow of the ignition control unit 91 in FIG. The processing is performed such as storing a mark to be controlled so that the operation processing of S19 to S24 is not executed. As a result, when the ignition operation is performed even when there is no cooking container A on the gas burner 11, the gas burner 11 is ignited, so that the user can respond to cooking purposes such as burning nori with a direct fire, and user convenience Will be better. Further, when the release button 17 is turned on, control may be performed so that the gas amount control valve 6 is not closed and the fire is not reduced even if the cooking container A is withdrawn during combustion of the gas burner 11. When the release button 17 is turned on, the release button 17 may be turned on in terms of appearance, such as being held in a depressed state or changing the color of the release button 17.

Further, the gas shut-off valve 7 and the gas amount adjusting valve 6 may be motor valves that are opened and closed by motor driving instead of the latch type electromagnetic valves. Since this motor valve does not require holding power for holding and closing the valve as in the case of the latch type electromagnetic valve, it is possible to suppress the power consumption.
Further, the gas shut-off valve 7 may be provided at the upstream position of the instrument plug 2 or the instrument plug 2.
Further, the gas amount adjusting valve 6 may be provided in the bypass passage by providing an orifice passage and a bypass passage bypassing the orifice passage in the gas passage at the downstream position or the upstream position of the instrument plug 2.
Moreover, the point-extinguishing button 3 is not limited to a push-in type, and may be a rotary type.

1 gas stove 2 appliance plug 3 point fire extinguishing button 6 gas amount adjustment valve (gas amount adjustment means)
7 Gas shut-off valve (valve closing means)
8 Ventilator 11 Gas burner 15 Switch means (cooking container detection means)
16 Infrared signal transmitter (Infrared signal transmitter)
19a Power 24 source gas valve (manual on-off valve)
25 Electromagnetic safety valve (manual on-off valve)
91 Ignition control unit 92 Fire extinguishing control unit 93 Power supply means A Cooking container

Claims (2)

In a gas stove installed in a gas passage for supplying a gas plug to a gas burner with a manual opening / closing valve that is manually opened during a gas burner ignition operation and manually closed during a fire extinguishing operation,
Cooking container detection means for detecting the presence or absence of a cooking container on the gas burner;
A valve closing means for shutting off the gas supply to the gas burner provided in the gas passage or the instrument plug;
An infrared signal transmitting means for transmitting an infrared signal as a command to start or stop the ventilation operation by receiving the ventilation device;
An ignition control unit for controlling the operation during the ignition operation;
A fire extinguishing control unit that controls the operation during the fire fighting operation,
Power supply means for supplying power from a power source to each part of the gas stove,
When a fire extinguishing operation is performed to manually close the manual opening / closing valve of the appliance plug, the fire extinguishing control unit issues a valve closing command for closing the valve closing means and turns off the power supply by the power supply means. Control
The ignition control unit is an infrared output for outputting an infrared signal for starting ventilation operation from the infrared signal transmitting means when an ignition operation for manually opening the manual opening / closing valve of the appliance plug is started and power is supplied from the power source. After that, when the presence of the cooking container is detected by the cooking container detection means, a valve opening instruction for opening the valve closing means is performed, and when the absence of the cooking container is detected, the valve opening instruction is issued. A gas stove that is controlled so that the valve closing means is kept in a closed state during a fire extinguishing operation and is not ignited by shutting off the gas supply to the gas burner. The gas stove according to claim 1, wherein
The gas passage or appliance plug is provided with a gas amount adjusting means for limiting the total gas supply amount to the gas burner to a small amount,
The fire extinguishing control unit controls to perform a valve closing command for closing the gas amount adjusting means,
A gas stove that controls the ignition control unit to issue a valve closing command to the valve closing means when no cooking container is detected.

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