JP5175792B2 - Gas stove - Google Patents

Description

  The present invention avoids a dangerous event caused by a direct fire when there is no cooking container in an ignition operation in a gas stove in which a manual open / close valve provided in a gas supply passage is manually opened to ignite a gas burner. It relates to the gas stove.

  2. Description of the Related Art Conventionally, there is a gas stove provided with an appliance plug provided with a manual opening / closing valve that is opened by a manual operation during an ignition operation. In this type of gas stove, due to the mechanical structure of the instrument plug, the instrument plug is fully opened by a manual ignition operation and gas is supplied to the gas burner.

  In view of this, there has been proposed a gas stove that controls the heating power to low heat when the absence of a cooking container is detected during the ignition operation of the gas burner and the flame is detected by igniting the gas burner (Patent Document 1). In this prior art, when a state where there is no cooking container is detected during the ignition operation, the gas burner is ignited once to prevent outflow of raw gas from the gas burner, and the heating power is reduced to a small fire immediately after ignition of the gas burner. By doing so, it is possible to avoid dangerous events caused by direct fire when there is no cooking container such as a hand touching a flame or a fire on a sleeve of clothes etc. .

JP 2007-46799 A

  However, since the conventional gas stove (Patent Document 1) ignites the gas burner even when there is no cooking container, it is possible to completely avoid a dangerous event caused by a direct fire without a cooking container at the moment of gas burner ignition. Have difficulty. For this reason, in a gas stove in which a manually openable / closable appliance plug is installed, further improvement in safety has been desired so as not to cause a dangerous event due to a direct fire without a cooking container during an ignition operation.

  The present invention has been made in view of the above circumstances, and in a gas stove in which a manual open / close valve provided in a gas supply passage is manually opened to ignite a gas burner, a direct operation without a cooking container is performed during an ignition operation. An object of the present invention is to provide a gas stove that can reliably avoid a dangerous event caused by a fire and that has good operability.

  A gas stove according to the present invention detects the presence or absence of a cooking vessel on a gas burner in a gas stove installed in a gas passage for supplying gas to the gas burner with an appliance plug provided with a manual open / close valve that is manually opened when the gas burner is ignited. A cooking container detection means, a gas shut-off means for shutting off the gas supply to the gas burner by being provided in the gas passage or appliance plug, and an ignition control means for controlling the operation during the ignition operation are provided, and the ignition control means is provided in the gas burner. On the other hand, when an ignition operation is performed, if the presence of a cooking container is detected by a detection signal from the cooking container detection means within a predetermined time after a shut-off signal is output to the gas shut-off means, the gas shut-off means is opened. It is the structure which performs the control which performs.

  According to this configuration, the gas burner is not ignited with the gas shut-off means closed unless it is determined that there is a cooking container within a predetermined time after the shut-off signal is output to the gas shut-off means. Therefore, ignition in a gas burner without a cooking container can be reliably prevented, and a dangerous event caused by a direct fire without a cooking container can be reliably avoided.

  Here, when it is determined that there is no cooking container at a specific point in the ignition operation, the cooking container is placed if the gas burner is not ignited even if the cooking container is placed immediately after the ignition operation is started. If the ignition operation is not performed again in this state, the gas burner cannot be ignited, resulting in poor operability.

  According to the present invention, even when the gas shut-off means is closed, the gas shut-off means can be opened and the gas burner can be ignited if the presence of the cooking container is detected within a predetermined time. Therefore, in the case where the cooking container is placed immediately after the ignition operation is started, the gas burner can be ignited without performing the ignition operation again, which improves usability.

  The gas stove according to the present invention is a gas stove installed in a gas passage for supplying a gas to the gas burner with an appliance stopper provided with a manual opening / closing valve that is manually opened during the ignition operation of the gas burner. A cooking container detection means for detecting, a gas shut-off means for shutting off the gas supply to the gas burner by being provided in the gas passage or appliance plug, and an ignition control means for controlling the operation at the time of the ignition operation, the ignition control means, When the ignition operation is performed on the gas burner, after the shut-off signal is output to the gas shut-off means, the presence / absence of the cooking container is continuously determined based on the detection result of the cooking container detecting means, and the first judgment is cooking. When there is a container, the gas shut-off means is opened. When the first determination is that there is no cooking container, the determination that there is a cooking container is made within the first predetermined time after the determination. The gas shut-off means is opened when there is a gas, and the control for maintaining the shut-off state of the gas shut-off means is performed when it is determined that there is no cooking container even after the first predetermined time has elapsed. To do.

  With such a configuration, when the ignition operation of the gas burner is started, the gas shut-off means is shut off first, and then the presence / absence of the cooking container is determined. When it is determined that the cooking container is present, the gas shut-off is performed. The means can be opened and ignited. Further, when it is determined that there is no cooking container, if it is determined that there is a cooking container within the first predetermined time after the determination, the gas shut-off means can be opened and ignited for the first predetermined time. If there is no cooking container after the elapse of time, the gas shut-off valve is kept closed so that ignition cannot be performed reliably.

  Thus, in the present invention, when the gas burner is ignited, the gas shut-off valve is always closed before the presence or absence of the cooking container is determined. The gas supply path to can be cut off. Therefore, ignition in a gas burner without a cooking container can be reliably prevented, and a dangerous event due to a direct fire without a cooking container can be reliably avoided.

  Moreover, the gas stove of the present invention is ignited again when the cooking container is placed within the first predetermined time after the determination, even if it is determined that there is no cooking container in the first determination of the presence or absence of the cooking container. Since the gas shut-off means is opened and ignited without operation, the operability can be improved. That is, even if the cooking container is placed on the gas burner after the ignition operation is started without the cooking container, the gas burner can be ignited within the first predetermined time after the determination of the absence of the cooking container. It can be improved. Further, when there is no cooking container even after the first predetermined time elapses, the shut-off state is maintained, so that a dangerous operation such that the gas burner is ignited with no cooking container on the gas burner is prevented. be able to.

  Furthermore, in the gas stove according to the present invention, when the ignition control means determines that there is a cooking container within the first predetermined time, after the determination that the cooking container is present, after the second predetermined time has elapsed, It is preferable to perform a control for opening the gas blocking means. With such a configuration, the cooking container is placed within the first predetermined time from the determination that there is no cooking container, and the gas burner is not ignited until the second predetermined time elapses after it is determined that there is a cooking container. It is possible to prevent a danger that the sleeve of the clothes is lit by direct fire immediately after the cooking container is placed on the gas burner.

  As described above, according to the present invention, in the gas stove in which the manual open / close valve provided in the gas supply passage is manually opened to ignite the gas burner, ignition without a cooking container on the gas burner is ensured. It is possible to prevent the danger event caused by the direct fire without the cooking container, and to improve the safety. In addition, when the cooking container is placed on the gas burner until a predetermined time has elapsed from the determination that there is no cooking container, the gas burner can be ignited without performing the ignition operation again, so that the operability can be improved. .

It is a front view which shows the external appearance structure of the gas stove with a cooking container detection function by this embodiment. 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 of the gas stove with a cooking vessel detection function by this embodiment. It is a block diagram which shows the structure of the gas stove with the cooking container detection function by this embodiment. It is a flowchart which shows the operation | movement at the time of ignition operation.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the gas stove 1 has a rectangular box-shaped stove body 10, and a top plate on the top surface of the stove body 10 is provided with a two-hole stove unit 13 including a gas burner 11. In each stove unit 13, the virtue 12 is arranged around the gas burner 11.

  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. The cooking vessel temperature sensor 14 is supported by the stove body 10 so as to be movable up and down.

  Furthermore, as shown in FIG. 2, each stove unit 13 is provided with a cooking container detection means 15 such as a micro switch for detecting the elevation state of the cooking container temperature sensor 14. The cooking container detection means 15 is provided at the base end of each cooking container temperature sensor 14.

  When there is no cooking container A in the virtues 12, the cooking container detection means 15 is in the off state because the cooking container temperature sensor 14 is in the raised position (see FIG. 2 (a)). Moreover, when the cooking container A is in the virtues 12, the cooking container temperature sensor 14 is lowered and turned on (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 cooking container detection means 15.

  Further, as shown in FIG. 1, on the front portion of the stove body 10, a fire extinguishing button 3 for turning off the gas burner 11 of each stove part 13 and a thermal power for adjusting the thermal power of the gas burner 11 of each stove part 13. An adjustment lever 4 is provided corresponding to each gas burner 11.

  And as shown in the gas circuit block diagram of FIG. 3, the fire extinguishing button 3 and the thermal power adjustment lever 4 corresponding to each stove part 13 are disposed in the gas supply path between the gas pipe and the gas burner 11, Connected to the instrument plug 2. Each appliance plug 2 includes a source gas valve 24 and an electromagnetic safety valve 25. Further, each stove unit 13 is provided with a microswitch 5 and a gas cutoff valve 6 for detecting the manual operation position of each point fire extinguishing button 3.

  As described above, the stove unit 13 includes the gas burner 11, the appliance plug 2 including the original gas valve 24 and the electromagnetic safety valve 25, the fire extinguishing button 3, the microswitch 5, and the gas as shown in the block diagram of FIG. 4. The shut-off valve 6 and the cooking container detection means 15 are provided.

  The appliance plug 2 is a mechanical appliance plug that is manually opened during the ignition operation by the point-off fire button 3. As shown in FIG. 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 from the upstream side. 25, an original gas valve 24, and a needle valve 26 for adjusting the gas amount are accommodated.

  The point-extinguishing button 3 includes a guide member 31 and a slider portion 32 provided in the guide member 31 so as to be movable in the front-rear direction. The slider portion 32 is biased forward by a coil spring 33.

  The fire extinguishing button 3 has a heart cam type push-push mechanism comprising a heart shaped cam groove 34 formed in the guide member 31 and an engagement member 35 attached to the slider portion 32 and engaging with the cam groove 34. Is provided. With this push-push mechanism, when the slider portion 32 is pushed to the end position and then released, the slider portion 32 is locked at the holding position before the start end position.

  The original gas valve 24 is fixedly attached to a predetermined position of the rod 27 and is urged by a coil spring 28 to the valve closing side (the side where the point-extinguishing button 3 is arranged). The rod 27 is disposed so that its base end portion is pressed by the slider portion 32 of the point-extinguishing button 3 and can move to the valve opening side.

  The original gas valve 24 is in a valve-closed state when the point-extinguishing button 3 is in a starting position where the pushing-out operation (ignition operation) is not performed. The original gas valve 24 is pressed by the portion 32 and is opened away from the valve seat against the biasing force of the coil spring 28.

  The electromagnetic safety valve 25 includes a valve body 25a that comes into contact with a valve seat body 23a fixed in the internal passage 23, a shaft portion 25b whose tip is fixed to the center of the valve body 25a, and a rear end of the shaft portion 25b. An adsorbing piece 25c to be fixed and an electromagnet 25d provided so as to be in contact with the adsorbing piece 25c are provided on the back side of the adsorbing piece 25c. The valve body 25a is biased toward the valve closing side (the side where the point-extinguishing button 3 is disposed) by a coil spring 29. The electromagnetic safety valve 25 is disposed in the internal passage 23 so that the valve body 25a can be moved in the valve opening direction by being pressed by the upstream end portion of the rod 27 together with the shaft portion 25b.

  The electromagnetic safety valve 25 is in a closed state when the point-extinguishing button 3 is in a start position where the push-out button 3 is not pushed in (ignition operation). Then, after the point-extinguishing button 3 is pushed (ignition operation) and the original gas valve 24 is opened, when the point-extinguishing button 3 is pushed to a predetermined position, the valve body 25a is moved to the shaft portion 25b. At the same time, it is pressed by the rod 27 and separated from the valve seat body 23a against the urging force of the coil spring 29 to be opened. At this time, the attracting piece 25c is attracted to the excited electromagnet 25d, and the electromagnetic safety valve 25 is held open.

  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 has opened.

  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 back and forth through the cam plate 26a by the operation of the heating power adjustment lever 4, the flow rate of the gas flowing through the internal passage 23 to the gas burner 11 is adjusted, and the heating power of the gas burner 11 is adjusted.

  As described above, in the present embodiment, when the point-extinguishing button 3 is pushed and the point-extinguishing button 3 enters the holding position, the original gas valve 24 is held open. On the other hand, when the point-extinguishing button 3 is in the holding position, the electromagnetic safety valve 25 is released from being pressed by the rod 27, but the attracting piece 25c is attracted and held by the electromagnet 25d against the coil spring 29 and held open.

  Further, as shown in FIG. 3, a gas cutoff valve 6 serving as a gas cutoff means is provided at a downstream position of the appliance plug 2 between the appliance plug 2 and the gas burner 11. The gas shut-off valve 6 is constituted by a latch type electromagnetic valve (self-holding type electromagnetic valve).

  The gas shut-off valve 6 comprising a latch type solenoid valve has an electromagnetic coil arranged around a plunger having a valve body at the tip, a permanent magnet is opposed to the rear end of the plunger, and this flanger is opposed to the permanent magnet by a spring. It is configured to urge toward the side.

  The gas shut-off valve 6 opens and closes the valve body by energizing an electromagnetic coil with an exciting current and moving the plunger. When the valve body is closed, for example, the valve body is biased by a spring. When the valve body is opened, the plunger is attracted by, for example, a permanent magnet to hold the valve body open. 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.

  A cam 36 is fixed to the slider portion 32 of the point fire button 3. The microswitch 5 that is turned on / off by the cam 36 is fixed to the guide member 31.

  The micro switch 5 constitutes position detecting means for detecting a manual operation position from the start end position to the end position of the slider portion 32 of the point fire 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 contacts the surface of the cam 36. In the micro switch 5, when the slider portion 32 is pushed and the movable piece 51 is pushed to the intermediate position by the cam 36, the first contact is turned on, and the slider portion 32 is pushed further to further move the movable piece 51. When pushed in, the second contact is turned on.

  The detection position of the manual operation position of the point fire button 3 will be specifically described. First, the first-stage instrument plug manual operation position where the first contact is turned on is set to a position immediately after the original gas valve 24 is opened. The second-stage instrument plug manual operation position where the second contact is turned on is set to a position after the electromagnetic safety valve 25 is opened. Therefore, when the second-stage instrument plug manual operation position is detected, the manual opening / closing valve composed of the original gas valve 24 and the electromagnetic safety valve 25, that is, the instrument plug 2 is open. 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, in this embodiment, immediately after the micro switch 5 detects the first-stage instrument plug manual operation position, the original gas valve 24 is opened, and the electromagnet 25d of the electromagnetic safety valve 25 is excited. The valve body 25a is in a closed state.

  Further, in the present embodiment, when the cooking container A is on the gas burner 11, the electromagnetic safety valve 25 and the gas shut-off valve 6 described later are opened until the second-stage appliance plug manual operation position is detected. It is like that.

  Further, the igniter 9 for igniting the gas burners 11 always causes all of the gas burners 11 to simultaneously perform spark discharge on the ignition electrodes. The igniter 9 is turned on after the second-stage instrument plug manual operation position is detected. In other words, the igniter 9 is controlled so that the ignition electrode sparks after the gas shut-off valve 6 is changed from the closed state to the open state.

  As shown in FIGS. 1 and 4, the gas stove 1 includes a control device 8 constituted by a microcomputer or the like that controls the operation of the gas stove 1. The control device 8 is provided with an ignition control means 81.

  The ignition control means 81 first closes the gas shutoff valve 6 immediately after starting the ignition operation of the gas burner 11, determines whether or not the cooking container A is present, and determines that the cooking container A is on the gas burner 11. In this case, the gas shut-off valve 6 is opened, and the igniter 9 performs spark discharge to control the gas burner 11 to ignite.

  Further, when it is determined that there is no cooking container A, the ignition control means 81 performs control so that the gas burner 11 is not supplied by supplying the gas burner 11 with the valve shut-off state maintained so that the gas burner 11 is not ignited.

  Furthermore, in this embodiment, even if it is determined that there is no cooking container in the first determination of the presence / absence of a cooking container, the ignition control means 81 has a cooking container within a first predetermined time (for example, 5 seconds) after the determination. When the determination is made, the gas shutoff valve 6 is controlled to open. At this time, the ignition control means 81 performs control to open the gas cutoff valve 6 after the second predetermined time (for example, 3 seconds) has elapsed after performing the determination of the presence of the cooking container. Further, when it is determined that there is no cooking container even after the first predetermined time has elapsed, the closed state of the gas shut-off valve 6 is maintained.

  Of the controls performed in the ignition control means 81, the gas stove 1 has a release key 7 for outputting a release signal for releasing the control that does not ignite the gas burner 11 when there is no cooking container A on the gas burner 11 (FIG. 1). Accordingly, the gas burner 11 can be ignited even when the cooking container A is not placed on the gas burner 11 according to the intention of the user.

  Next, the operation at the time of ignition in the gas stove 1 having the above configuration will be described based on the flowchart of FIG.

  In order to start the ignition operation, when the fire extinguishing button 3 is pushed in, 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 fire extinguisher button 3 (Yes in S2), the control device 8 is turned on, and the electromagnet 25d of the electromagnetic safety valve 25 is turned on. Is energized by applying a current and outputs a signal for closing the gas shutoff valve 6 (S3).

  When a valve closing signal is output to the gas shut-off valve 6 (S3) and a predetermined time (for example, 100 ms) has elapsed (Yes in S4), the output of the signal to close the gas shut-off valve 6 is terminated, and the gas shut-off valve 6 is closed (S5).

  Here, since the gas shut-off valve 6 uses a simple latch-type electromagnetic valve, it is not known whether it is finally opened or closed. Therefore, in steps S3 to S5, a valve closing signal is output from the ignition control means 81 to the gas shut-off valve 6 regardless of the open / close state of the gas shut-off valve 6 to reliably perform the valve closing operation.

  Thereafter, the ignition control means 81 determines whether or not the cooking container A is arranged on the gas burner 11 based on the detection result of the cooking container detection means 15 (S6). Although not shown in the flowchart of FIG. 5, the ignition control means 81 does not perform the following control when the control without the cooking container is canceled by the release key 7.

  If it is detected in step S6 that the cooking container A is present (Yes in S6), the ignition control means 81 outputs a signal for opening the gas shutoff valve 6 (S7), When time (for example, 100 ms) elapses (Yes in S8), the output of the signal for opening the gas cutoff valve 6 is terminated and the gas cutoff valve 6 is opened (S9). Then, the electromagnetic safety valve 25 is opened by further pressing the point fire extinguishing button 3, and gas is supplied from the instrument plug 2 to the gas burner 11 through the gas cutoff valve 6.

  Then, after the output of the valve opening signal to the gas shut-off valve 6 is completed, when the second switch instrument manual operation position is detected by the microswitch 5 by pressing the fire extinguishing button 3 (Yes in S10), the igniter 9 A voltage is applied to the ignition electrode (S11), and the ignition electrode is subjected to spark discharge. When a thermocouple (TC) (not shown) detects the flame of the gas burner 11 and reaches the ignition level or higher (Yes in S12), the application of voltage to the igniter 9 is stopped (S13).

  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 appliance plug 2 are held open, and the gas cutoff valve 6 is opened. The gas burner 11 continues to be burned (S14).

  In Step S6, when it is determined that there is no cooking container A (No in S6), it is determined whether or not a first predetermined time (for example, 5 seconds) has elapsed since this determination ( S15). Until the first predetermined time elapses (No in S15), it is continuously determined whether the cooking container A is placed on the gas burner 11 based on the detection result of the cooking container detection means 15 (S16). ).

  When it is determined that the cooking container A is placed on the gas burner 11 within the first predetermined time (Yes in S16), the second time is determined from the determination that the cooking container A is placed on the gas burner 11. It is determined whether or not a predetermined time (for example, 3 seconds) has passed (S17). When the second predetermined time has elapsed since the cooking container A was placed on the gas burner 11, the above-described control from step S7 to S14 is performed.

  In Step 15, when the first predetermined time has passed without the cooking container A on the gas burner 11 (Yes in S15), the cooking container A is not on the gas burner 11 and ignition is necessary. It is determined that there is no current, and the application of current to the electromagnet 25d in the electromagnetic safety valve 25 is stopped, and the fact that there is no cooking container A is notified by a notification means (not shown) such as a buzzer or a display (S18). At this time, since the gas shut-off valve 6 is maintained in the closed state, the gas burner 11 is not ignited (S19).

  By stopping the application of current to the electromagnet 25d of the electromagnetic safety valve 25, it is possible to prevent the electromagnetic safety valve 25 from being held open. At this time, since the gas shut-off valve 6 is also kept closed, the outflow of raw gas from the gas burner 11 can be reliably prevented.

  And by notifying that there is no cooking container, the gas burner 11 is not ignited even though the fire extinguishing button 3 is operated, so that the user is prevented from misidentifying that the gas stove 1 is out of order. Can be urged to be placed on the gas burner 11 to ignite the gas burner 11.

  In the present embodiment, when the gas burner 11 is ignited in the gas stove 1, the gas shutoff valve 6 must be closed before the determination of the presence or absence of the cooking container A on the gas burner 11, and the cooking container Control is performed so that the gas shut-off valve 6 is opened when it is determined that A is present.

  Therefore, even if the gas stove 1 according to the present embodiment has the instrument plug 2 including the manual opening / closing valve including the original gas valve 24 and the electromagnetic safety valve 25, the ignition cook operation must be performed before the manual opening / closing valve is opened. Since the gas shutoff valve 6 is closed, the raw gas is not released from the gas burner 11 when the cooking vessel A is not on the gas burner 11, and ignition can be reliably prevented even if the igniter 9 is ignited and discharged.

  As a result, the gas stove 1 according to the present embodiment has a dangerous event (hand or the like is in contact with the flame) caused by an open fire when the cooking vessel A is not present during the ignition operation in the gas stove 1 provided with the manual appliance plug 2. And the like can be reliably avoided, and the safety can be improved.

  Moreover, in the gas stove of the present embodiment, even when it is determined that there is no cooking container A in the first determination of the presence or absence of the cooking container (S6), the cooking container A is placed within the first predetermined time from the determination. In (Yes in S16), the operability can be improved because the gas cutoff valve 6 is opened and ignited without performing the ignition operation again.

  Further, if the ignition control means 81 determines that there is a cooking container within the first predetermined time (Yes in S16), the ignition control means 81 performs the determination that there is a cooking container and then after the second predetermined time has elapsed ( Since the gas cutoff valve 6 is opened at S17), the gas burner 11 is not ignited until the second predetermined time elapses after it is determined that there is a cooking container. As a result, immediately after placing the cooking container A on the gas burner 11, it is possible to prevent a danger that the clothes sleeve will catch fire due to direct fire.

  Further, from the first determination that there is no cooking container (No in S6), if there is no cooking container even after the first predetermined time has elapsed (Yes in S15), it is determined that there is no cooking container A on the gas burner 11. Since the ignition is not performed (S19), it is possible to prevent a dangerous operation in which the gas burner 11 is ignited without the cooking container.

  In the above operation, when the control based on the detection that there is no cooking container is released by turning on the release key 7, for example, the user burns the seaweed with a direct fire on the gas burner 11. Even in the state where the cooking container A is not disposed, the gas burner 11 can be ignited by performing the ignition operation. Therefore, the convenience for the user is improved.

  Further, in the present embodiment, when it is determined that there is a cooking container and an ignition operation is performed, the gas shutoff valve 6 is opened to release gas from the gas burner 11 and then the igniter 9 is controlled to be ignited and discharged. Therefore, backfire of the gas burner 11 can be prevented, and good ignition of the gas burner 11 can be surely performed.

  In addition, this invention is not limited to the said embodiment, A various change can be given within the scope of the present invention. For example, in the above embodiment, the manual open / close valve is configured as a set of the original gas valve 24 and the electromagnetic safety valve 25. However, the electromagnetic safety valve 25 may be eliminated and the manual open / close valve may be configured using only the original gas valve 24. . In this case, when the gas burner 11 is misfired, the gas shut-off valve 6 that is a gas shut-off means may be closed.

  Furthermore, in the gas stove according to the present invention, the gas cutoff valve 6 may be a motor valve. In this case as well, power is consumed when the valve is driven, but holding power for holding the valve closed and holding the valve is not required, so that power consumption can be suppressed. Therefore, when the battery is used as a power source, it is possible to prevent early deterioration of performance such as battery life.

  Further, in this embodiment, the gas shut-off valve 6 as the gas shut-off means is provided at the downstream position of the instrument plug 2. However, the gas shut-off valve 6 may be provided at the upstream position of the instrument plug 2 or inside the instrument plug 2. You may make it provide in the channel | path 23. FIG. Moreover, the point-extinguishing button 3 may adopt a rotary type.

  In the present embodiment, the first predetermined time (S15 in FIG. 5) for determining whether or not the cooking container A is placed immediately after the ignition operation is started is after the first determination of the presence or absence of the cooking container (FIG. 5). The measurement is performed from S6), but the time when the manual operation position of the first stage is detected and the valve closing signal is output to the gas shut-off valve 6 or until the first determination of the presence or absence of the cooking container (FIG. 5). The time may be measured from any time point of S2 to S6).

DESCRIPTION OF SYMBOLS 1 Gas stove 3 Point-extinguishing button 5 Micro switch 6 Gas shut-off valve 8 Control apparatus 9 Igniter 11 Gas burner 13 Stove part 15 Cooking container detection means 24 Original gas valve 25 Electromagnetic safety valve 81 Ignition control means A Cooking container

Claims (3)

In a gas stove that is installed in a gas passage for supplying a gas to a gas burner with an instrument plug provided with a manual on-off valve that is manually opened during the ignition operation of the gas burner,
Cooking container detection means for detecting the presence or absence of a cooking container on the gas burner;
A gas shut-off means for shutting off the gas supply to the gas burner provided in the gas passage or the instrument plug;
An ignition control means for controlling the operation during the ignition operation,
When the ignition operation is performed on the gas burner, the ignition control means detects the presence of the cooking container by the detection signal of the cooking container detection means within a predetermined time after outputting the cutoff signal to the gas cutoff means. In the case, a gas stove configured to perform control to open the gas blocking means. In a gas stove that is installed in a gas passage for supplying a gas to a gas burner with an instrument plug provided with a manual on-off valve that is manually opened during the ignition operation of the gas burner,
Cooking container detection means for detecting the presence or absence of a cooking container on the gas burner;
A gas shut-off means for shutting off the gas supply to the gas burner provided in the gas passage or the instrument plug;
An ignition control means for controlling the operation during the ignition operation,
When the ignition operation is performed on the gas burner, the ignition control means outputs a shut-off signal to the gas shut-off means, and then continuously determines whether or not there is a cooking container based on the detection result of the cooking container detecting means. When the first determination is that there is a cooking container, the gas shut-off means is opened, and when the first determination is that there is no cooking container, there is a determination that there is a cooking container within the first predetermined time after the determination. A gas stove configured to open the gas shut-off means when the gas is discharged and to maintain the shut-off state of the gas shut-off means when it is determined that there is no cooking container even after the first predetermined time has elapsed.   3. The gas stove according to claim 2, wherein when the ignition control means determines that there is a cooking container within the first predetermined time, the second predetermined time elapses after determining that there is a cooking container. A gas stove configured to perform control to open the gas shut-off means later.

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