JP6182049B2 - Cooking device - Google Patents

Description

The present invention provides a fuel passage for supplying fuel to a burner provided with a combustion detection means, and a flow rate control valve provided in plural in series with the fuel passage and having a closing function for preventing the passage of fuel in the fuel passage. And a control unit for controlling the driving of the flow rate control valve, and the control unit opens all the flow rate control valves when the burner is shifted from the combustion stop state to the combustion state, When the burner is shifted from the combustion state to the combustion stop state, the flow control valve other than the one flow control valve among the flow control valves is kept open and the one flow control valve is closed, A cooker for determining that the one flow control valve is in a failure state when the combustion detection means does not detect the stop of combustion when the one flow control valve is closed,
The one flow rate control valve includes a first magnetic body that is magnetized by energization by the control unit, and a second magnetic body that is provided with a valve body. The first magnetic body is attracted to the second magnetic body to maintain the valve open state, and after the valve open state is maintained, energization of the attraction current is interrupted and the second magnetic body is moved to the first magnetic body. It is related with the technique which improves the convenience of the cooking appliance comprised so that it may detach | leave from the magnetic material of this and close.

  2. Description of the Related Art Conventionally, there is known a cooker in which a plurality of flow control valves having a closing function for blocking the passage of fuel in the fuel passage are provided in series in a fuel passage for supplying fuel to a burner (for example, Patent Documents) 1). Examples of the flow rate control valve include a flow rate control valve for controlling the amount of fuel passing through the fuel passage, a shutoff valve for preventing the passage of fuel, and the like, provided that it has a closing function for reducing the flow rate to zero. Good.

  In Patent Document 1, two flow rate control valves that are provided in series in a fuel passage and are opened simultaneously at the time of combustion are provided, and at the end of combustion, one flow rate control valve is set to a predetermined delay from the other flow rate control valve. By closing the valve with a delay of time, check for leaks in the flow control valve that is closed within this delay time, and alternately switch the flow control valve that performs the delay operation every time an end-of-combustion request arrives after combustion. This is to check the failure of the two flow control valves.

Moreover, the cooking device shown in Patent Document 2 includes a first magnetic body magnetized by energization and a second magnetic body provided with a valve body as a flow control valve, and an adsorption current is generated by the control unit. The first magnetic body is energized and the second magnetic body is attracted to maintain the valve open state, and after maintaining the valve open state, energization of the attraction current is interrupted and the second magnetic body becomes the first magnetic body. A flow control valve (electromagnetic safety valve) configured to be detached from the body and closed is provided.

Japanese Patent Laid-Open No. 62-14726 Japanese Patent No. 4536035

  As in the cooking device shown in Patent Document 2, the first magnetic body magnetized by energization and the second magnetic body provided with a valve body are provided, and the adsorption current is energized by the control unit to be the first. The second magnetic body is attracted to the magnetic body to maintain the valve open state, and after maintaining the valve open state, the energization of the attraction current is interrupted and the second magnetic body is detached from the first magnetic body. By applying the technique shown in Patent Document 1 to a cooker provided with a flow control valve (electromagnetic safety valve) configured to close, two gas pipes arranged in series in the gas flow path of the cooker It is possible to check for a failure of the flow control valve.

  However, like the cooking device shown in Patent Document 2, the flow control valve includes a first magnetic body magnetized by energization and a second magnetic body provided with a valve body, and is attracted by the control unit. When the current is applied, the second magnetic body is attracted to the first magnetic body to maintain the valve open state, and after the valve open state is maintained, the energization of the attraction current is interrupted and the second magnetic body is In the case of an electromagnetic safety valve configured to be separated from the magnetic material and close, the first magnetic material and the second magnetic material that accompany the repeated adsorption of the second magnetic material to the first magnetic material. The magnetic resistance between the first magnetic body and the second magnetic body is reduced due to the familiarity of the contact surface with the magnetic body, and the separation current of the flow control valve (electromagnetic safety valve) is reduced. May occur.

  Even if the separation current of the flow control valve (electromagnetic safety valve) decreases, the power supply to the flow control valve (electromagnetic safety valve) is reduced by completely shutting off the power supply to the flow control valve (electromagnetic safety valve). If it is set to zero, the flow control valve (electromagnetic safety valve) can be closed and no safety inconvenience occurs, but the flow control valve (electromagnetic safety valve) is closed due to a malfunction of the control unit. When the flow control valve (electromagnetic safety valve) has a current value that is not zero and a small current such as a leakage current is supplied to the flow control valve (electromagnetic safety valve), the value of this small current is as described above. If it is larger than the decreased release current of the flow control valve (electromagnetic safety valve), it is determined by the technique disclosed in Patent Document 1 that a valve opening failure of the flow control valve (electromagnetic safety valve) has occurred. .

  If it is determined that a valve opening failure has occurred, the other flow control valve disposed in series with the flow control valve (electromagnetic safety valve) is closed, and the flow control valve is opened after that point. Safety measures such as prohibiting the operation will be taken, and the user will be unable to use the cooker from that point.

  That is, the first magnetism is caused by the familiarity of the contact surface between the first magnetic body and the second magnetic body due to repeated adsorption of the second magnetic body to the first magnetic body. Although the decrease in reluctance between the body and the second magnetic body is an event that gradually progresses with repeated use of the cooker, the user cannot use the cooker from a certain point in time. An inconvenient state suddenly occurred and the convenience was poor.

The present invention has been made paying attention to such a point, the purpose of which can check the failure of the flow control valve disposed in the gas flow path of the cooker, is safe, The decrease in the magnetic resistance between the first magnetic body and the second magnetic body due to the familiarity of the contact surface between the first magnetic body and the second magnetic body provided in the flow control valve is cooked. Conveniently prevents the inconvenience that the cooker can no longer be used from a certain point even when the flow control valve detachment current gradually decreases with repeated use of the cooker. The point is to provide a cooker.

  In order to achieve this object, a cooker according to the present invention includes a fuel passage for supplying fuel to a burner provided with a combustion detection means, and a plurality of fuel passages provided in series in the fuel passage, each of the fuel in the fuel passage. A flow rate control valve having a closing function for preventing passage, and a control unit for controlling driving of the flow rate control valve, and the control unit is configured to shift the burner from a combustion stop state to a combustion state. When all the flow control valves are opened and the burner is shifted from the combustion state to the combustion stop state, the flow control valves other than the one flow control valve among the flow control valves are maintained open and the When the one flow rate control valve is closed and the combustion detection means does not detect the stop of combustion when the one flow rate control valve is closed, it is determined that the one flow rate control valve is in a failure state. Cooking device The one flow rate control valve includes a first magnetic body magnetized by energization by the control unit and a second magnetic body provided with a valve body, and an adsorption current is energized by the control unit. Then, the second magnetic body is attracted to the first magnetic body to maintain the valve open state, and after maintaining the valve open state, the energization of the attraction current is interrupted and the second magnetic body is The invention according to claim 1 is configured so as to be separated from the first magnetic body and closed, and before the controller cuts off the energization current after maintaining the valve open state, A flow rate control valve is energized with a separation current confirmation current set to a predetermined value smaller than the adsorption current, and the combustion detection means does not detect the stop of combustion within a predetermined time after the separation current confirmation current is energized. If it is determined that the separation current of the one flow control valve is too low , Which is characterized in that to perform the treatment for withdrawal current under-state.

  According to the first aspect of the present invention, it is possible to check the failure of the flow control valve disposed in the gas flow path of the cooker, and it is safe, and the first magnetism provided in the flow control valve. The decrease in the magnetic resistance between the first magnetic body and the second magnetic body due to the familiarity of the contact surface between the body and the second magnetic body is gradually increased with repeated use of the cooker. Even when the process progresses, although the treatment for the state where the disconnection current is low is executed, it is possible to provide a highly convenient cooking device in which an inconvenient state in which the cooking device cannot be suddenly used from a certain point does not suddenly occur. .

  The cooker according to claim 2 is the cooker according to claim 1, further comprising: a voice notification unit that emits a voice message or a display notification unit that performs notification by display, wherein the control unit serves as the treatment for the state where the separation current is too low. In this case, the first-stage treatment for undercurrent state in which the notification is performed by the voice notification unit or the display notification unit is performed.

  According to the second aspect of the present invention, the voice notification means for sending a voice message to the cooker or the display notification means for performing notification by display is provided, and the voice notification means or the display notification means notifies as a treatment for the state where the separation current is insufficient. Since the first stage treatment for undercurrent state in which the release current is low is executed, the user can perform maintenance of the cooking device by notification by means of voice notification means or display notification means. Can be used stably, further improving convenience.

  In short, according to the second aspect of the present invention, in addition to the effect of the first aspect, it is possible to make the cooking device more convenient.

  The cooker according to a third aspect of the present invention is the cooker according to the second aspect, wherein the control is performed when the cumulative number of times of execution of the first stage detachment current understate treatment reaches a predetermined number. The unit is characterized in that it performs a second-stage disengagement current excessive state treatment that prohibits the opening of the flow control valve.

  According to the third aspect of the present invention, when the flow control valve (electromagnetic safety valve) is closed at the time when the flow control valve (electromagnetic safety valve) is closed due to a malfunction of the control unit, the current value to the flow control valve (electromagnetic safety valve) is zero. Even when a small current such as leakage current is energized to the flow control valve (electromagnetic safety valve), the cumulative number of executions of the first stage release current undercurrent state treatment reaches a predetermined number In addition, by performing the second stage release current excessive state treatment that prohibits the opening of the flow control valve electromagnetic safety valve), the release current of the flow control valve (electromagnetic safety valve) is greater than a minute current such as the above leakage current. At that time, the opening of the flow control valve electromagnetic safety valve) can be prohibited, and a safer cooker can be obtained.

  In short, according to the third aspect of the present invention, in addition to the effect of the second aspect, it is possible to provide a safer cooker.

  A cooker according to a fourth aspect of the present invention is the cooker according to the third aspect, wherein the controller is configured to initialize the cumulative number when a reset command is commanded by a reset command means. It is characterized by that.

  According to the fourth aspect of the present invention, when the cooker is maintained in response to the notification by the voice notification unit or the display notification unit, the reset command unit instructs the reset command by the maintenance performer. The cumulative number of times can be initialized, and after the maintenance point, the flow rate control is inadvertently performed before the cumulative number of times the first stage release current undercurrent state treatment has reached a predetermined number of times. It is possible to avoid the execution of the second-stage disengagement current undercurrent condition prohibiting the opening of the valve electromagnetic safety valve), and to make the cooking device more convenient.

  In short, according to the invention of the fourth aspect, in addition to the effect of the third aspect, it is possible to make the cooking device more convenient.

According to the first aspect of the present invention, it is possible to provide a highly convenient cooking device that does not suddenly cause an inconvenient state that the cooking device cannot be used from a certain point in time.
Moreover, according to invention of Claim 2, in addition to the effect by Claim 1, it becomes possible to set it as the cooker with higher convenience.
Further, according to the third aspect of the invention, in addition to the effect of the second aspect, a safer cooker can be provided.
Moreover, according to the invention of Claim 4, in addition to the effect of Claim 3, it becomes possible to make the cooking device more convenient.

It is a whole perspective view of the gas stove of this embodiment. It is a figure explaining supply of the fuel gas of the gas stove same as the above. It is a figure explaining the flow control valve of the gas stove same as the above. It is a figure explaining the power supply circuit of the gas stove same as the above. It is a flowchart explaining the operation | movement at the time of fire extinguishing of a gas stove same as the above.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  As shown in FIG. 1, the gas stove 1 as a cooking device is a box-shaped housing 10 that opens upward, and the upper opening of the housing 10 is closed to become the top surface portion of the gas stove 1. The outer shell is constituted by the glass top plate 11.

  The top plate 11 is provided with a plurality of heating units 2 each equipped with a stove burner 25. In the embodiment shown in FIG. 1, a total of three stove burners 25 including a standard burner 2 a, a small burner 2 b, and a high thermal power burner 2 c are provided as the heating unit 2. Reference numeral 21 in FIG. 1 indicates five virtues.

  The gas stove 1 is provided with a grill cabinet provided with a grill burner, and the front opening of the grill stove is closed openably and closably by a grill door 12 provided on the front surface of the gas stove 1.

  Each heating unit 2 is provided with an object detection means 22. The heated object detection means 22 detects whether or not the heated object is placed on the virtues 21, that is, whether or not the heated object is placed on the stove burner 25. To do.

  The front panel 13 constituting the front portion of the gas stove 1 is provided with operation portions 14 each comprising a knob dial device for operating each heating portion 2.

  Each operation unit 14 is manually operated to instruct to switch ignition and extinguishing of the corresponding burner burner 25 and to adjust the heating power, and in response to this, the control unit H switches to switching off the point extinguishing of each burner burner 25. And adjust the thermal power.

  A setting input panel 15 constituting setting means for instructing setting of cooking of the corresponding burner burner 25 is provided on the lower side of each operation unit 14 of the front panel 13, and this setting input panel 15 is operated. Thus, for each stove burner 25, an automatic cooking mode such as a cooking timer mode, a water heater mode, a rice cooking mode, or the like can be set.

  In addition, a setting input panel 16 for instructing switching of ignition and extinguishing of the grill burner and adjustment of the thermal power is provided on the left side of the front panel 13.

  When cooking without mode setting by the setting input panels 15 and 16, the power switch 17 provided on the front surface is turned on, and then the operation unit 14 or the setting input panel 16 is pressed to ignite the control unit H. Send the command. Upon receiving this command, the control unit H opens the original electromagnetic valve 27 of the gas supply path 26 described later, and opens the flow rate control valve 3 corresponding to an optional stove burner 25 or grill burner at a predetermined opening and spark plug 24. And the stove burner 25 or grill burner is ignited. Thereby, the to-be-heated material mounted on the 5 virtues 21 corresponding to the flame of the stove burner 25 can be heated, and the meat and fish in the grill can be baked by the flame of the grill burner.

  The cooking device is provided with a control unit H composed of a microcomputer. The controller H receives an electromotive force of a thermocouple 23 (see FIG. 2) as the combustion detection means 51 provided in each burner (a stove burner 25, a grill burner), and the controller H receives the input electromotive force. When the value becomes equal to or higher than a predetermined value (for example, 3.5 mV), the setting lamps 15 and 16 and / or the combustion lamps (burning lamps corresponding to the respective burners) provided on the display unit provided on the top plate 11 are turned on. Let

  Each stove burner 25 and grill burner are connected to a fuel passage for supplying fuel. In this embodiment, the fuel passage is branched from a gas supply passage 26 for supplying a fuel gas such as city gas. A branch path 26a is connected.

  Further, a flow rate control valve 3 having a closing function for controlling the amount of fuel passing through the fuel passage and blocking the passage of fuel in the fuel passage, and a driving means for driving the flow rate control valve 3 are provided. In this embodiment, a stepping motor 30 is provided as a driving means for adjusting the supply amount of the fuel gas, and is driven by the stepping motor 30 to finely adjust the opening position of the slide closure 34 described later. The driving means may be a motor other than the stepping motor 30 and is not particularly limited. Further, position detecting means 4 for detecting the opening position of the slide closing member 34 is provided, which will be described in detail later. Further, an original solenoid valve 27 as a flow rate control valve (which is different from the flow rate control valve 3 described above) having a closing function for preventing the passage of fuel in the fuel passage is held open by energizing each branch passage 26a. Provided. Thus, in the flow rate control valve having a closing function for preventing the passage of fuel in the fuel passage, the flow rate control valve 3 and the original electromagnetic valve 27 are provided in series, and another flow rate control valve is provided in series. May be provided.

  The original electromagnetic valve 27 and the stepping motor 30 that drives the flow control valve 3 are controlled by the control unit H, and the detection information in the position detection means 4 is read into the control unit H and processed. In addition, the flow rate control valve 3 is closed so that the flow rate becomes zero and the shut-off state is established when the corresponding gas burner 25 is not used.

  The flow control valve 3 will be described. As shown in FIG. 3, a cavity 31a is formed in the main body 31 of the flow control valve 3, and a gas inlet 32 communicating with the outside of the main body 31 is formed in a part of the inner surface of the cavity 31a. The gas outlet 33 is formed at another location, and the cavity 31a becomes a part of the fuel passage. The cavity 31a is provided with a slide closing member 34, a flow rate chip 35, and an urging member 36. The original solenoid valve 27 opens or closes the gas inlet 32.

  The slide closing member 34 is provided with a communication hole 34a formed therethrough so as to be in contact with an inner surface (referred to as an outlet vicinity surface) around the gas outlet 33 of the cavity 31a and to be slidable along this surface. As the slide closure 34 slides, the gas outlet 33 of the cavity 31 a communicates with the communication hole 34 a or is blocked by the slide closure 34.

  The flow rate chip 35 has a plate shape, and the area of the plate surface is at least larger than the communication hole 34a of the slide closure 34, and a plurality of flow rate control holes (not shown) penetrating substantially perpendicularly to the plate surface. ) Is drilled. The flow rate chip 35 is in contact with a surface opposite to the surface in contact with the exit vicinity surface of the slide closing member 34 and is urged by an urging member 36 made of a coil spring or the like. The biasing member 36 is disposed in a compressed state between the surface of the flow rate chip 35 opposite to the surface that contacts the slide closing member 34 and the surface facing the exit vicinity surface of the cavity 31a. The closing member 34 is brought into pressure contact with the vicinity of the outlet. A spindle 37 is connected to the slide closing member 34 at one end in the direction of sliding along the exit vicinity surface of the cavity 31a.

  The spindle 37 is inserted into and out of the cavity 31a through a spindle insertion hole drilled in a part of the side wall of the cavity 31a, and the shape is not particularly limited. However, in the present embodiment, the spindle 37 is substantially rod-shaped. is there. One end of the rod-shaped spindle 37 in the longitudinal direction is located inside the cavity 31a and connected to the slide closure 34, and the other end is located outside the cavity 31a to form a female threaded portion 37a. The spindle 37 is slidable in the longitudinal direction through the spindle insertion hole, and a grease is filled between the spindle insertion hole and the outer surface of the spindle 37 so as to seal the gap.

  Further, a rotation preventing means is provided so that the spindle 37 does not rotate in the longitudinal direction relative to the cavity 31a (the main body 31 of the flow control valve 3). For example, although not shown, the spindle insertion hole is formed in a shape such as a rectangle other than circular, and the cross-sectional shape of the portion of the spindle 37 that is inserted into the spindle insertion hole is formed in the same shape as the spindle insertion hole. Stop means may be configured.

  A stepping motor 30 that slides the spindle 37 and the slide closure 34 is provided outside the cavity 31 a in a state where the position is fixed with respect to the flow control valve 3. The output shaft of the stepping motor 30 has a male screw portion 30 a formed on the outer surface of the tip portion thereof, and this male screw portion 30 a is screwed into the female screw portion 37 a of the spindle 37. In addition, while the external thread part 30a is formed in the outer surface of the other end part of the spindle 37, the internal thread part 37a may be formed in the front-end | tip part of an output shaft.

  When the output shaft of the stepping motor 30 rotates, the male screw portion 30a rotates. However, since the rotation of the spindle 37 is prevented by the rotation preventing means, the female screw portion 37a does not rotate with the output shaft, and the screwing position changes. Thus, the slide of the spindle 37 in the longitudinal direction and the slide closing member 34 are slid. Further, a slide blocking means (not shown) is provided for preventing the flow rate chip 35 from moving in the sliding direction when the slide closing member 34 slides. The slide blocking means is configured, for example, by applying a lubricant to the sliding surface between the slide closing member 34 and the flow rate chip 35 or by connecting the flow rate chip 35 to the main body 31 of the flow rate control valve 3.

  In a state where the communication hole 34a and the gas outlet 33 are communicated with each other by the slide of the slide closing member 34, the gas outlet 33 and the gas outlet 33 are arranged outside the gas outlet 33 according to the communication area between the communication hole 34a and the flow rate control hole of the flow rate chip 35. The flow rate of the gas flowing out to is controlled. The position of the slide closing element 34 shown in FIG. 3 is the position where the gas flow rate is maximized (the maximum gas flow rate position), and the slide closing element 34 slides toward the spindle 37, so that the communication hole 34a and the flow rate are increased. When the communication area with the control hole is reduced and the gas flow rate is reduced, and the communication hole 34a and the gas outlet 33 are not communicated with each other (closed position), the fuel passage is blocked and the gas flow rate becomes zero.

  In addition, the position detection means 4 of the spindle 37 is provided, and the position detection means 4 detects the position of the spindle 37 and the position of the slide closing member 34, so that the communication hole 34a and the gas outlet 33 are communicated. The communication area between the communication hole 34a and the flow rate control hole is known, and the gas flow rate can be indirectly detected. In the present embodiment, the position detection means 4 is configured by the position detection brush 41 provided on the spindle 37 and the position detection unit 42 fixed to the main body 31 of the flow control valve 3.

  The relationship between the operation of the power switch 17 and the supply of power to the control unit H will be described with reference to FIG. In the power supply circuit of FIG. 4, a battery is used for the power supply unit B in this embodiment. The switch S1 is a tact switch, and the switch S1 is turned on only while the user pushes the power switch 17 (hereinafter referred to as “power-on operation”), and when the push operation is stopped, the switch S1 is turned off. Become.

  The cathode of the diode D1 is connected to the power supply terminal Vd of the control unit H, the GND terminal of the control unit H is connected to the negative electrode of the power supply unit B, and from the positive electrode of the power supply unit B, the emitter-collector of the transistor TR1, the diode D1, A power supply circuit that reaches the power supply terminals Vd and GND of the control unit H and the negative electrode of the power supply unit B is formed. The control unit H includes two input terminals V1 and V2 and an output terminal of Vcont.

  When a base current flows through TR3 by turning on the power and TR3 is turned ON and a collector current of TR3 flows, a base current flows through TR1 and TR1 is turned ON to supply power to the control unit H. Once power is supplied to the control unit H, the control unit H outputs a High signal from Vcont and a base current is supplied to TR5. When the pressing operation of the power switch 17 is stopped with the completion of the power-on operation, the switch S1 is turned off and the base current does not flow to TR3 and TR3 is turned off. However, when the base current is supplied to TR5, TR5 is turned on and TR5 is turned on. Since the collector current flows and the base current of TR1 is supplied, the supply of power to the control unit H is continued when the collector current of TR1 continues to flow.

  TR4 is a transistor for detecting a pressing operation of the power switch 17 in a power supply state to the control unit H. When the power switch 17 is pushed in the power supply state to the control unit H, the switch S1 is turned on, the base current is supplied to TR4, TR4 is turned on, and the TR4 is turned on, whereby the input V1 of the control unit H is , Changes from High to Low. Further, when the power switch 17 finishes the pushing operation, the switch S1 is turned off, the base current of the TR4 is cut off, the TR4 is turned off, and the TR4 is turned off, so that the input V1 of the control unit H changes from Low to High.

  When the power switch 17 provided on the front surface is operated while the gas stove 1 is in use, the control unit H detects the fall of the input V1 (change from High to Low) in the energized state of the control unit H. Since the switch S1 is turned on while the power is on, it is determined that an operation for turning off the power has been performed, and the power off process is executed.

    The first power-off process is a flow control valve closing process that drives the motor to close the fuel passage when the power is turned off.

  The second power-off process is a process of storing internal information in the control unit H in a nonvolatile memory (for example, EEPROM) provided in the control unit H. The internal information in the control unit H includes the accumulated use count of the gas stove 1, the accumulated use time of the stove burner 25 and the grill burner, and the accumulated number of maintenance notifications described later. By storing the accumulated use count of the gas stove 1, the accumulated use time of the stove burner 25 and the grill burner, and the accumulated number of maintenance notifications to be described later in the non-volatile memory, when the battery is replaced, the control unit H can be supplied. Even when the power is cut off, the control unit H can hold information on the cumulative number of times of use of the gas stove 1, the cumulative use time of the stove burner 25 and the grill burner, and the cumulative number of maintenance notifications described later. The stored information can be notified of the cumulative number of times the gas stove 1 is used and the display that prompts the user to perform maintenance when the cumulative use time of the stove burner 25 and the grill burner exceeds a predetermined value. Can be used.

  Further, when the cumulative number of maintenance notifications, which will be described later, exceeds a predetermined value, ignition of the gas stove and the grill burner is prohibited.

  The third power-off process is a process for stopping the energization to the control unit H. The control unit H performs a process for stopping the energization to the control unit H when the power switch 17 is operated. Run like this.

  Once the supply of power to the control unit H is started, as described above, the High signal is output from Vcont and the base current is supplied to TR5, whereby TR5 is turned on and the collector current of TR5 flows and TR1 flows. Since the base current is supplied and the collector current of TR1 continues to flow, the supply of power to the control unit H is continued. However, when the control unit H is energized to the control unit H, the input V1 falls (High) When the rising edge of the input V1 (change from Low to High) is detected after detecting the change from low to high, the switch S1 is turned off after being turned on, that is, the user turns off the power by the power switch 17. It is determined that the processing has ended, and Vcont is changed from High to Low.

  However, if the process for storing the internal information in the control unit H described above in a nonvolatile memory (for example, EEPROM) provided in the control unit H or the flow rate control valve closing process is not completed, the internal information in the control unit H will be described. Vcont is changed from High to Low after both the process of storing information in a nonvolatile memory (eg, EEPROM) provided in the control unit H and the flow rate control valve closing process are completed.

  When the flow control valve closing process is completed, all the flow control valves 3 are fully closed, and when the power is turned off, the original solenoid valve 27 that was kept open by energization is closed, so that the gas to all burners is closed. The supply passage is safe because the fuel passage is cut off twice by the original solenoid valve 27 and the flow control valve 3 for each burner.

  By changing Vcont from High to Low, the supply of the base current of TR1 is stopped by the above-described TR5, so TR1 is turned OFF and the energization to the control unit H is stopped.

  As described above, a plurality of flow rate control valves having a closing function for blocking the passage of fuel in the fuel passage (two of the original electromagnetic valve 27 and the flow rate control valve 3 in this embodiment) are provided in series in the fuel passage. However, if this flow control valve fails at the same time, safety is impaired.

  Therefore, in the present embodiment, when the burner is shifted from the combustion state to the combustion stop state, a source for determining whether or not the one-way solenoid valve 27 among the plurality of the source solenoid valve 27 and the flow control valve 3 has failed. The check mode for the solenoid valve 27 is executed.

  In the check mode for the original solenoid valve 27, when the burner is shifted from the combustion state to the combustion stop state, the flow control valve 3 is maintained open, the original solenoid valve 27 is closed, and the original solenoid valve 27 is closed. When the valve is closed, the electromotive force of the thermocouple 23 (see FIG. 2) does not drop below the extinguishing detection value (for example, 2.5 mV), that is, when the combustion detecting means 51 does not detect the stop of combustion. It is determined that the electromagnetic valve 27 is in a failed state.

  In the present embodiment, the original electromagnetic valve 27 includes a first magnetic body 27a that is magnetized by energization by the control unit H, and a second magnetic body 27b that is provided with a valve body 27c. The attracting current KI (1 mA in this embodiment) is energized, the second magnetic body 27b is attracted to the first magnetic body 27a, and the original electromagnetic valve 27 is kept open, and the original electromagnetic valve 27 is opened. The second magnetic body 27b is separated from the first magnetic body 27a and is closed after the energization of the adsorption current KI is interrupted after the state is maintained. 27a and the second magnetic body 27b to which the valve body 27c is attached, the energization from the control unit H to the original electromagnetic valve 27 is completely stopped when the original electromagnetic valve 27 is closed. Even in the magnetic circuit constituting the magnetic circuit of the original solenoid valve 27, The influence of flux, when the reduction of the leaving current source solenoid valve 27 has occurred, there may not be closed based on the electromagnetic valve 27, it is considered a safety hazard.

  Therefore, in the present invention, before the controller H cuts off the energization of the adsorption current KI after maintaining the valve open state, the control unit H supplies the original electromagnetic valve 27 with a predetermined value (this value) smaller than the adsorption current KI (1 mA in this embodiment). In the embodiment, the separation current confirmation current RI set to 0.1 mA) is applied, and the combustion detection means 51 is combusted within a predetermined time (15 seconds in the present embodiment) after the separation current confirmation current RI is applied. When it is not detected that the motor is stopped, it is determined that the original solenoid valve 27 is in the state of excessive separation current, and the treatment for the state of insufficient separation current is executed.

  In the present embodiment, the control unit H performs voice notification by the voice notification unit 8a (see FIG. 3) that issues a voice message, and at the same time leaves the display notification unit 8b (see FIG. 3). Take action for undercurrent conditions. In addition, it is good also as a structure which alert | reports only by either the audio | voice alerting | reporting means 8a or the display alerting | reporting means 8b.

  Further, when the cumulative number of executions of the first stage separation current undercurrent state treatment reaches a predetermined number (three times in the present embodiment), the control unit H controls the original solenoid valve 27 and the flow control valve 3. A second stage disengagement current under-state treatment for prohibiting valve opening is executed. It should be noted that, as a measure for the second-stage release current excessive state, the opening of either the original solenoid valve 27 or the flow control valve 3 may be prohibited. "

  In the present embodiment, until the cumulative number of executions of the first stage release current undercurrent state treatment reaches a predetermined number (three times in the present embodiment), or the first stage release current undercurrent state treatment. When the reset command is issued by a reset command means (not shown) by the maintenance service servicing after the accumulated number of times reaches a predetermined number (three times in the present embodiment), the control unit H Initialize the count to zero.

  The above-described determination of the state in which the separation current of the original solenoid valve 27 is too small will be described below with reference to the flowchart of FIG. In the following description, the above-described determination of the excessive current release state of the original solenoid valve 27 and the treatment for the low current release state in the first stage are collectively performed, and the treatment for the low current release state in the second stage is collectively referred to as maintenance. This is called notification control.

  In the maintenance notification control (subroutine), as shown in FIG. 5, a fire extinguishing command is issued by operating the operation unit 14 or the power switch 17 while the burner is burning, that is, while the original solenoid valve 27 and the flow control valve 3 are opened. The presence or absence is checked (S001). When there is no fire extinguishing command by operating the operation unit 14 or the power switch 17, the routine returns to the eye-tone routine, and when there is a fire extinguishing command by operating the operation unit 14 or the power switch 17, the original solenoid valve 27 is kept open. Is changed from a normal holding current of 1 mA to a holding current of 0.1 mA as a separation current confirmation current RI, and a timer is started (S002).

  Then, it is checked whether or not 15 seconds have elapsed since the start of the timer count (S003), and whether or not flame has been detected by the thermocouple 23 when 15 seconds have elapsed since the start of the timer count. Whether or not is checked (S004).

  When the flame is not detected by the thermocouple 23, the process returns to the main routine, and when the flame is detected by the thermocouple 23, the current for holding the valve opening of the original electromagnetic valve 27 is cut off (S005), It is checked whether or not 30 seconds have elapsed since the start of the timer count (S006), and whether or not flame has been detected by the thermocouple 23 when 30 seconds have elapsed from the start of the timer count. It is checked (S007).

  In S007, when a flame is detected by the thermocouple 23, it is determined that the original solenoid valve 27 has a valve opening failure, and a notification is made that an original solenoid valve opening failure error has occurred (S008). The opening of the solenoid valve is prohibited (S012).

  In S007, when the flame is not detected by the thermocouple 23, it is not a malfunction of the original electromagnetic valve 27, and the separation current of the original electromagnetic valve 27 is reduced to 01 mA or less. It is determined that the state is an under-state, and a notification for urging maintenance is performed as a first-stage disengagement state under-state treatment (S009).

  Then, it is checked whether or not the cumulative number of notifications for urging maintenance as the first stage separation current under-state treatment is 3 or more (S010), and maintenance is performed as the first stage separation current under-state treatment. When the cumulative number of times of prompting notification is less than three, the process returns to the main routine, and when the cumulative number of times of notification of prompting maintenance as a first stage disengagement current low state treatment is three times or more, the original solenoid valve The second stage separation current excessive state treatment that prohibits the opening of the valve 27 is executed (S012), and the process returns to the main routine.

Although not shown in FIG. 5, the cumulative number of notifications for prompting maintenance as the first stage release current excessive state treatment is initialized to zero when a reset command is issued by a reset command means (not shown). The valve opening prohibition state of the original solenoid valve 27 due to the execution of the second-stage release current undercurrent state treatment is maintained until a reset command is issued by a reset command means (not shown).

  The fuel for the cooking device is not limited to gas, but may be other fuels including petroleum-based fuel, and the type of fuel is not particularly limited.

DESCRIPTION OF SYMBOLS 1 Gas stove 10 Case 11 Top plate 12 Grill door 13 Front panel 14 Operation part 15 Setting input panel 16 Setting input panel 17 Power switch 2 Heating part 23 Thermocouple 27 Original solenoid valve 27a 1st magnetic body 27b 2nd Magnetic body 27c Valve body 3 Flow rate control valve 30 Stepping motor 30a Male thread part 31 Main body 31a Cavity 32 Gas inlet 33 Gas outlet 34 Slide closure 34a Communication hole 35 Flow rate chip 36 Biasing member 37 Spindle 37a Female thread part 4 Position detection means 41 Position detection brush 42 Position detection unit 51 Combustion detection unit 8a Audio notification unit 8b Display notification unit H Control unit KI Adsorption current RI Separation current confirmation current

Claims (4)

A fuel passage for supplying fuel to a burner provided with a combustion detection means; a flow control valve provided in series in the fuel passage and having a closing function for preventing passage of fuel in the fuel passage; and the flow rate A control unit for controlling drive of the control valve, and the control unit opens all of the flow rate control valves when the burner is shifted from the combustion stop state to the combustion state, and burns the burner. When shifting from the state to the combustion stop state, the flow rate control valve other than the one flow rate control valve among the flow rate control valves is maintained open and the one flow rate control valve is closed, When the combustion detection means does not detect the stop of combustion when the valve is closed, the one flow rate control valve determines that the one-flow control valve is in a failure state,
The one flow rate control valve includes a first magnetic body that is magnetized by energization by the control unit, and a second magnetic body that is provided with a valve body. The first magnetic body is attracted to the second magnetic body to maintain the valve open state, and after the valve open state is maintained, energization of the attraction current is interrupted and the second magnetic body is moved to the first magnetic body. In the cooker configured to close and close from the magnetic body,
Before the control unit shuts off the energization of the adsorption current after maintaining the valve open state, the control unit energizes the one flow rate control valve with a separation current confirmation current set to a predetermined value smaller than the adsorption current, If the combustion detecting means does not detect the stop of combustion within a predetermined time after applying the current for confirming the separation current, it is determined that the one flow control valve is in a state where the separation current is too small, and the treatment for the state where the separation current is small is performed. A cooking device characterized by performing.
A first-stage detachment comprising a voice notification means for issuing a voice message or a display notification means for performing notification by display, wherein the control section performs notification by the voice notification means or the display notification means as the measure for the separation current under-state. 2. The cooker according to claim 1, wherein a treatment for an undercurrent state is executed.
When the cumulative number of executions of the first stage release current undercurrent state treatment reaches a predetermined number, the control unit prohibits the opening of the flow control valve for the second stage release current undercurrent state. The cooker according to claim 2, wherein a treatment is executed.
  The cooker according to claim 3, wherein the controller is configured to initialize the cumulative number when a reset command is commanded by a reset command means.