JP2015148356A - Gas cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate disadvantage found in a usual gas cooking stove in which a gas burner ignition or extinction and a gas burner fire force adjustment are carried out by one operation knob and in particular, the ignition or extinction is manually carried out and the fire force adjustment is carried out by an electric actuator such as a motor, even if the operation knob is pushed into an ignition position, the motor must be driven to make an appropriate degree of opening unless a degree of opening of a gas passage is set to a degree of opening suitable for ignition, and to the contrary, an operating person cannot acknowledge whether or not the operation knob has already been pushed into the ignition position due to no operation of the igniter during a period in which the degree of opening is adjusted by the motor.SOLUTION: A gas cooking stove comprises a position sensor for detecting that an operation knob has already been pushed into an ignition position, and informing means operated without being related to a degree of opening of a fire force adjustment device upon detection by the position sensor that the position sensor has already been pushed into the ignition position.

Description

  The present invention relates to a gas stove device that performs point extinguishing and heating power adjustment of a gas burner with a single operation knob, and in particular, manually performs point extinguishing and performs heating power adjustment with an electric actuator such as a motor.

  As a gas stove device as described above, each gas burner has one operation knob. When the operation knob is pushed from the fire extinguishing position toward the ignition position set inside the gas cooker, the gas burner is ignited and pushed into the operation knob. It is known that when the force is released, the operation knob returns to the heating power adjustment position and protrudes.

  As an example of such a gas stove device, a motor is incorporated as an electric actuator in the thermal power control device, and when the operation knob is pushed from the fire extinguishing position to the ignition position, the control unit detects it and activates the motor. It is known that the valve body of the electromagnetic safety valve incorporated in the adjusting device is forcibly opened until it contacts the electromagnet in the electromagnetic safety valve, and when ignition is completed, the motor is further operated to adjust the thermal power. (For example, refer to Patent Document 1).

  In this case, when the operation knob is rotated with the operation knob protruding to the heating power adjustment position, the sensor detects the rotation amount, and the gas is supplied to the gas burner by operating the motor according to the rotation amount. The flow rate is increased or decreased.

  Therefore, in this case, both the operation for forcibly opening the electromagnetic safety valve at the time of ignition of the gas burner and the subsequent heating power adjustment operation are performed by the motor.

JP 2006-308228 A (FIG. 4)

  In the above conventional gas stove device, the electromagnetic safety valve is opened by a motor, but this operation must be performed against the biasing force of the spring, so the operation of adjusting the thermal power is performed after that. On the other hand, the power consumption in the motor is large.

  In particular, when the operation power of the entire gas stove apparatus is performed by a dry battery, the life of the battery is shortened if the electromagnetic safety valve is opened by a motor. In such a case, a configuration is conceivable in which the electromagnetic safety valve is manually opened and only the heating power adjustment operation is performed by the motor. However, in such a configuration, it is necessary to open the electromagnetic safety valve with the pushing force of the operation knob and to press the valve element against the electromagnet, so the sensor that detects whether the operation knob is pushed into the ignition position reliably Is required.

  In addition, if the amount of gas supplied to the gas burner is too small during ignition, ignition cannot be performed reliably, resulting in poor ignition. Conversely, if the amount of gas supplied is too large, an explosion that produces a loud noise during ignition or a flame after ignition. The fire overflows from the pot etc. to the outside. Therefore, at the time of ignition, the gas flow rate needs to be an optimum flow rate for ignition.

  In a gas stove device that performs both ignition operation and thermal power adjustment operation manually, the igniter is activated immediately when the fire extinguisher button is pushed to the ignition position, and the fire extinguisher button is reliably pushed to the ignition position for those who are operating it. I was able to find out by the operation of the igniter.

  However, in the case where the ignition operation is manually performed as described above and the thermal power adjustment operation is performed by the motor, even if the operation knob is pushed to the ignition position, the opening degree of the thermal power control device must be an opening suitable for ignition. For example, the motor must be operated to adjust the opening, and the igniter cannot be operated until the adjustment of the opening by the motor is completed.

  Then, even if the operation knob is pushed down to the ignition position, the igniter may not operate. In this case, the person who is operating does not know when the finger can be released from the operation knob, and the motor adjusts the opening degree. Until the igniter is operated after completion of the operation, the operation knob is kept pushed down, which may make the operation troublesome.

  In view of the above problems, an object of the present invention is to provide a gas stove device that notifies that the operation knob is pushed to the ignition position by means other than the operation of the igniter.

  In order to solve the above-mentioned problems, a gas stove device according to the present invention includes an operation knob that performs point fire extinguishing and heating power adjustment of a gas burner. The electromagnetic safety valve in the thermal power control device that adjusts the gas supply amount is forcibly opened by the pushing force against the operation knob, and the valve body is brought into contact with the electromagnet in the electromagnetic safety valve to be adsorbed and held. After the installed igniter is actuated and the valve body of the electromagnetic safety valve is attracted and held by the electromagnet, when the pushing force on the operation knob is released, the operation knob is set back to the thermal power adjustment position and operated at the thermal power adjustment position. When the knob is rotated, the amount of rotation is detected by a sensor, and the electric actuator incorporated in the thermal power control device is operated to operate it. In the gas stove device that adjusts the heating power according to the amount of rotation of the knob, a position sensor is provided to detect that the operation knob is pushed to the ignition position, and the position sensor detects that the operation knob is pushed to the ignition position. When the position sensor detects that the operation knob has been pushed to the ignition position and the igniter is activated when the opening degree of the thermal power control device is an opening degree suitable for ignition in the state, An informing means that operates regardless of the opening degree of the adjusting device is provided.

  According to the above configuration, since the notification means operates until the opening degree of the thermal power control device becomes an opening degree suitable for ignition, the person who performed the ignition operation pushes the operation knob to the ignition position, and the valve body of the electromagnetic safety valve Can be known to be attracted and held by the electromagnet, and the push into the operation knob can be released. Therefore, it is not necessary to maintain the state where the operation knob is pushed into the ignition position until the opening degree of the thermal power control device becomes an opening degree suitable for ignition and the igniter is activated.

  Note that the igniter does not operate even when the operation knob is not fully pressed down to the ignition position, but in this case, the middle position of the operation knob moving from the fire extinguishing position to the ignition position is detected. If the second position sensor is provided, and the second notification means that operates until the operation knob passes through the intermediate position detected by the second position sensor and reaches the ignition position, the notification means is provided. Instead, it is possible to know that the push-in is insufficient by operating the second notification means.

  As is apparent from the above description, in the present invention, when the igniter does not operate even when the operation knob is pushed down to the ignition position, the notification means can know that the operation knob is pushed down to the ignition position.

The perspective view which looked at the gas stove by this invention from the front The figure which shows the piping state in a gas stove Perspective view of thermal power control device The figure which shows the operation state of the micro switch which is a position sensor Flow chart showing details of control during ignition operation

  With reference to FIG. 1, 1 is an example of the gas stove apparatus by this invention. A glass top plate 11 is provided on the upper surface of the gas stove device 1, and the top plate 11 is provided with three gas burners 11a, 11b, and 11c. On the other hand, the front panel 12 of the gas stove 1 is provided with thermal power control devices 13a, 13b, and 13c for performing point-extinguishing operations and thermal power control operations of the gas burners 11a, 11b, and 11c. In addition, a grill box 14 is provided in the approximate center of the front panel 12, and an upper fire burner 14 a and a lower fire burner 14 b are installed in the grill box 14. Then, the fire extinguishing and the thermal power adjustment of the upper fire burner 14 a and the lower fire burner 14 b are performed by the thermal power adjusting device 15.

  Since the top plate 11 is made of glass, LEDs 10 a, 10 b, and 10 c which are notification means described later are disposed below the top plate 11. These LEDs 10a, 10b, and 10c are provided corresponding to the thermal power control devices 13a, 13b, and 13c, respectively, and cannot be seen from above the top plate 11 in the unlit state, but when turned on or flashing, from above the top plate 11 It can be visually recognized. In addition, you may provide LED10a, 10b, 10c of an alerting | reporting means above the thermal-power adjustment apparatus 13a, 13b, 13c provided in the front.

  Referring to FIG. 2, in the present embodiment, the gas supply lines are branched into four in parallel, and thermal power control devices 13a, 13b, 13c, 15 are provided in the branched supply lines. ing. The thermal power control device 13a will be described as an example. The thermal power control device 13a includes an on-off valve portion 2 for performing point-extinguishing and a flow rate adjusting portion 3 for performing thermal power control.

  In the on-off valve portion 2, a main valve 21a that is opened by a manual operation and a valve body 22a of an electromagnetic safety valve are provided in series. On the other hand, a motor 31 is connected to the flow rate adjusting unit 3 as an electric actuator, and the flow rate is increased or decreased by driving the motor 31. Although both the thermal power control devices 13b and 13c have the same structure as the thermal power control device 13a, the thermal power control device 15 has the same structure as the on-off valve unit 2, but the structure of the flow rate control unit 3 is different from the other.

  The flow rate control unit 3 of the thermal power control device 15 is branched into two parallel systems, each of which is provided with on / off valves 15a and 15b that open and close by electromagnetic force, and an orifice 16 that bypasses both the on / off valves 15a and 15b. It has been. Therefore, for example, when the on-off valve 15a is opened, the heating power of the upper fire burner 14a becomes high fire, and when the on-off valve 15a is closed, the gas passing through the orifice 16 makes low fire.

  With reference to FIG. 3 and FIG. 4, the structure of the thermal power control device 13a will be described by taking the thermal power control device 13a as an example.

  Reference numeral 4 denotes an operation knob which is pushed in when extinguishing a point and is rotated while holding the outer peripheral surface when adjusting the heating power. The operation knob 4 is always urged toward the front side. When the operation knob 4 is pushed against the urging force from the fire extinguishing position, the dog 6 provided on the member housed in the rectangular tube-shaped guide member 5 is pushed together with this member and moves to the back side. . And the member in which the dog 6 is provided moves to the back, forcibly opens the valve body of the electromagnetic safety valve accommodated in the on-off valve portion 2, and is accommodated in the same electromagnetic safety valve. The valve element is pressed against the electromagnet.

  When DC power is supplied to the electromagnet from a control unit (not shown), the electromagnet is excited to attract and hold the valve body in the valve open state. If the pushing force with respect to the operation knob 4 is released in this state, the operation knob 4 protrudes to the heating power adjustment position on the near side by the urging force. When extinguishing the fire, once the operation knob 4 is pushed in until the fire extinguishing position is exceeded and the pushing force is released, the operation knob 4 returns to the fire extinguishing position and is held at that position.

  When the operation knob 4 is rotated with the operation knob 4 protruding to the heating power adjustment position, the rotation shaft of the rotary encoder 41 as a rotation sensor rotates through the gear train, and is proportional to the rotation amount of the operation knob 4. A pulse signal is output to the control unit. When the control unit receives this pulse signal, the control unit is configured to drive the motor 31 of the thermal power control unit 3 to adjust the flow rate.

  On the left side as viewed from the front of the guide member 5, a micro switch 51 having two contacts that are turned on and off depending on the front and rear positions of the dog 6 is attached. The microswitch 51 is provided with two contacts SW1 and SW2. The contact SW1 is a second position sensor, and is a position sensor that detects that the contact SW2 is pushed to the ignition position.

  As shown in FIG. 4, when the dog 6 moves from the front toward the back, the contact SW1, which is the second position sensor, is first turned ON. When the operation knob 4 is further pushed in and the operation knob 4 reaches the ignition position, the contact SW2 that is a position sensor is turned on. When the pushing force on the operation knob 4 is released at the ignition position, the operation knob 4 protrudes backward to the heating power adjustment position as described above, but the member on which the dog 6 is formed is a stopper mechanism (not shown). Thus, the contact SW1 is held in a state where it is returned to the position where it is turned on.

  As shown in the figure, the microswitch 51 is fixed so as to be held by three claws 5 a formed on the side surface of the guide member 5. The microswitch 51 is positioned by inserting the two protrusions 5 b through the mounting holes formed in the microswitch 51. Therefore, no screws are used when attaching the microswitch 51 to the guide member 5.

  When the operation knob 4 is in the fire extinguishing position, the dog 6 does not push down the plunger portion 51a, so that the contacts SW1 and SW2 built in the microswitch 51 are both turned off (FIG. 4 (a)). . From this state, when the operation knob 4 is pushed in, the dog 6 moves backward, that is, to the left in FIG. 4, so that the dog 6 pushes down the plunger portion 51a and turns on the contact SW1 as shown in FIG. . At this time, the contact SW2 remains off.

  When the operation knob 4 is further pushed down to the ignition position, the dog 6 further pushes the plunger portion 51a and turns on the contact SW2 as shown in (c).

  When the contact SW1 is turned on, energization is started in a control unit (not shown). The gas stove 1 of the present embodiment incorporates a dry battery as a power source for operation. In a state where all the operation knobs 4 are in the fire extinguishing position, it is not necessary to operate the control unit, and thus energization to the control unit is stopped. When any of the operation knobs 4 is pushed to ignite, before reaching the ignition position, as shown in FIG. 4B, the contact SW1 is turned on to start energization of the control unit. When the contact SW2 is turned on, the control unit detects that the operation knob 4 has been pushed to the ignition position. Note that when one of the operation knobs 4 is already in the heating power adjustment position and another control knob 4 is pushed in while the control unit is energized and the contact SW1 is newly turned on, the control unit already has Since it is energized, the control unit detects that the contact SW1 is newly turned on.

  Details of the ignition operation will be described with reference to FIG. The flow shown in FIG. 5 shows a flow when a new ignition operation is performed on a gas burner in a fire extinguisher state while the control unit is already energized.

  The controller in the energized state constantly monitors that the contact SW1 is newly turned on (S1). The case where the thermal power control device 13a is operated will be described as an example. When the operation knob 4 is pushed in from the fire extinguishing position and the contact SW1 is turned on, the electromagnet exciting coil built in the electromagnetic safety valve (SV) is immediately energized. At the same time as starting (S2), the LED 10a is blinked (S3). In this state, the valve body of the electromagnetic safety valve is attracted to the electromagnet, and the valve body is held in the open state.

  As shown in FIG. 4 above, when the contact SW1 is turned on, the contact SW2 should be turned on, but when the contact SW2 is not turned on even after a predetermined time has passed (S4, S6). Then, an error is notified by a warning sound or a lamp (S5), and further ignition operation is stopped. Note that the LED 10a continues to blink until a predetermined time has elapsed and an error is notified in S5.

  On the other hand, when the contact SW2 is turned on within a predetermined time, it is determined that the operation knob 4 has been pushed to the ignition position, and the LED 10a is switched from the blinking state to the lighting state (S7). Actually, since the time until switching from the blinking state to the lighting state is short, the person who performs the ignition operation does not recognize that it blinks, and recognizes that it has been lit from the beginning. Since the operation knob 4 is pushed to the ignition position, the igniter that is an igniter is operated. When it is detected in S1 that the contact SW1 is turned on, the opening of the motor 31 is simultaneously controlled. Is checked whether or not the opening is suitable for ignition (S8). If the opening is not suitable for ignition, the motor 31 is temporarily turned off. The operation is continued in the direction and stepped out in contact with the stopper, and the opening is adjusted to an opening suitable for ignition by returning a predetermined angle from the stopper (S9).

  In any case, when the opening is not suitable for ignition, the igniter is not operated even when the contact SW2 is turned on, and the igniter is confirmed to be suitable for ignition. Was activated (S10). It should be noted that when the opening degree by the motor 31 is adjusted in S9, it takes about several seconds. During this time, the igniter does not operate, but the LED 10a continues to be lit, so that the operation knob 4 is surely pushed to the ignition position. Can know the fact and release his finger from the operation knob 4. When the igniter is activated, the control unit confirms ignition (S11).

  When the pushing force applied to the operation knob 4 is released by turning on the LED 10a, the operation knob 4 returns to the front and protrudes, the dog 6 also returns to the front, and the contact SW2 is turned off. Once SW2 is turned on, the igniter operates for a predetermined time as soon as the opening adjustment by the motor 31 is completed, even if SW2 is turned off before the igniter is operated. However, as described above, since the dog 6 is held in the state shown in FIG. 4B, the contact SW1 remains on. At this time, instead of returning the LED 10a to the blinking state, the LED 10a is kept in the lighting state or is turned off for energy saving.

  By the way, in the above embodiment, when the contact SW1 is turned on, the LED 10a is blinked, and when the contact SW2 is turned on, the LED 10a is switched to the lighting state. However, when the contact SW1 is turned on, the LED of one color is switched on. When the contact SW2 is turned on, the LED of one color may be turned off and the LED of the other color may be turned on.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Gas cooker 2 On-off valve part 3 Flow control part 4 Operation knob 5 Guide member 13a Thermal power control apparatus 13b Thermal power control apparatus 15 Thermal power control apparatus 31 Motor 41 Rotary encoder 51 Micro switch 6 Dog SW1 Contact SW2 Contact

Claims (2)

  An electromagnetic safety valve in the thermal power control device that adjusts the gas supply amount to the gas burner when the control knob in the fire extinguishing position is pushed to the ignition position set inside the appliance. Is forced to open by the pushing force against the operation knob, the valve body is brought into contact with the electromagnet in the electromagnetic safety valve, and the igniter installed in the vicinity of the gas burner is operated, so that the valve body of the electromagnetic safety valve is After releasing the pushing force to the operation knob after being attracted and held by the electromagnet, the operation knob is configured to retract to the thermal power adjustment position.When the operation knob is rotated at the thermal power adjustment position, the amount of rotation is detected by the sensor. A gas stove device that adjusts the thermal power according to the amount of rotation of the operation knob by operating the electric actuator incorporated in the thermal power control device. And a position sensor for detecting that the operation knob has been pushed to the ignition position, the position sensor detects that the operation knob has been pushed to the ignition position, and the opening degree of the thermal power control device is set to ignition. When the opening degree is appropriate, the igniter is operated, and when the position sensor detects that the operation knob has been pushed to the ignition position, a notification means that operates regardless of the opening degree of the thermal power control device is provided. A gas stove device characterized by being provided.   A second position sensor is provided for detecting a halfway position in which the operation knob moves from the fire extinguishing position to the ignition position, and the operation knob passes through the middle position detected by the second position sensor until reaching the ignition position. The gas stove device according to claim 1, further comprising second notifying means that operates for a while.

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