JP5746482B2 - Cooker and cooker safety system - Google Patents

Description

  The present invention relates to a technique for improving the safety of a cooker in which a plurality of flow rate control valves having a closing function for preventing passage of fuel are provided in series in a fuel passage.

  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. It ’s 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, checking the leakage of the flow control valve that is closed within this delay time, and switching the flow control valve that operates in delay every time a combustion request arrives, two flow rates This is to check for control valve failure.

Japanese Patent Laid-Open No. 62-14726

  However, in this case, when the two flow control valves are simultaneously broken, it is impossible to take an appropriate measure for ensuring safety.

The present invention has been invented in view of the above-described conventional problems, and the object of the present invention is that two or more of the flow control valves having a closing function provided in series in the fuel passage fail. It also provides a cooker that can take appropriate measures to ensure safety.

  In order to solve the above problems, the cooking device of the present invention has the following configuration.

A fuel passage for supplying fuel to a burner provided with a combustion detection means, and a flow rate control valve provided with three or more in series in the fuel passage and having a closing function for preventing passage of fuel in the fuel passage, A drive unit that drives the flow rate control valve, and a control unit for driving the drive unit, and the control unit is configured to move all of 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 valves other than the one flow control valve among the flow control valves are kept open and the one flow control valve is closed. When the combustion detection means does not detect the stop of combustion within a predetermined time after closing the one flow control valve, it is determined that the first flow control valve is in a first failure state. The first to When the control mode is executed and the first failure state is determined, the control unit is one flow rate other than the one flow rate control valve determined to be defective among the flow rate control valves. If the combustion detection means does not detect the stop of combustion within a predetermined time after the control valve is closed and the other flow control valve is closed, the other flow control valve has failed. The second check mode for determining the second failure state is further executed, and after the second check mode is executed, all the flow control valves are prohibited from being opened and the second failure state is determined. In some cases, a failure condition treatment is performed.

Thus, even if the failure two simultaneously among three or more flow control valves, and can run for fault condition treated, it is possible to take appropriate action to ensure the safety.

  Moreover, the cooking appliance which concerns on Claim 2 is provided with the audio | voice alerting | reporting means which emits an audio | voice message, or the display alerting | reporting means which alert | reports by a display in the cooking appliance which concerns on Claim 1, and the failure which alert | reports by an audio alerting means or a display alerting | reporting means A condition treatment is performed.

  As a result, even if the two flow control valves break down at the same time, it is possible to urge the user to close the main plug of the fuel passage, ventilate indoor air, evacuate, etc. It can be secured.

  The cooker safety system according to claim 3 includes a transmission unit that transmits the emergency signal to the cooker according to claim 1 or 2, and a reception unit that receives the emergency signal outside the cooker. Install an external device that has a function to shut off the fuel passage, and when the emergency signal sent by the cooker is received by the external device, execute the treatment for the fault condition that shuts off the fuel passage and stops the fuel supply to the cooker It is characterized by doing.

  As a result, even if the two flow control valves fail at the same time, the fuel passage outside the cooking device is blocked by the external device, so that the fuel is prevented from leaking from the cooking device, thereby further ensuring safety.

  According to a fourth aspect of the cooker safety system of the present invention, the cooker according to the first or second aspect includes a transmission unit that transmits an emergency signal and a reception unit that receives the emergency signal. Install a communication device equipped with a transmission means for transmitting an emergency signal to a communication station such as a monitoring center, and when the communication device receives an emergency signal transmitted by a cooker, a failure condition treatment that transmits an emergency signal to the communication station It is characterized by performing.

  As a result, even if the two flow control valves break down at the same time, it communicates with the communication station, and a guard or emergency worker rushes to close the main plug, or directly or remotely operates the fuel passage outside the cooker. Therefore, it is possible to take appropriate measures such as shutting off, thereby further ensuring safety.

  The cooker safety system according to claim 5 is provided with a transmitter for transmitting the emergency signal to the cooker according to claim 1 or 2, and a receiver for receiving the emergency signal to ventilate indoor air. A ventilator equipped with a ventilation means is installed, and when the emergency signal transmitted from the cooker is received by the ventilator, a fault condition treatment is performed to ventilate the indoor air.

  Thereby, even if two flow control valves break down simultaneously, indoor air can be ventilated by the ventilator, fuel is prevented from filling the room, and further safety can be ensured.

  In the present invention, even if two of the flow control valves fail at the same time, the failure state treatment can be executed, and appropriate measures for ensuring safety can be taken.

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 which illustrates roughly the whole structure of the gas stove same as the above. It is a circuit diagram which shows the circuit structure in connection with the electric power feeding to a control part. It is a figure which illustrates roughly the whole structure of the 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 denotes 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 the ignition and extinguishing of the corresponding burner burner 25 and to adjust the thermal power, and in response to this, the control unit switches to the point-extinguishing of each burner burner 25. Adjust firepower.

  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 is pressed to send an ignition command to the control unit. Upon receiving this command, the control unit opens the original electromagnetic valve 27 of the gas supply path 26 described later, opens the flow rate control valve 3 corresponding to an optional stove burner 25 or grill burner at a predetermined opening, and opens the spark plug 24. Spark and ignite the stove burner 25 or grill burner. 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 including a microcomputer. An electromotive force of a thermocouple 23 (see FIG. 2) as combustion detection means provided in each burner (a stove burner 25, a grill burner) is input to the control unit, and the input electromotive force is a predetermined value. When it becomes (for example, 3.5 mV) or more, the combustion lamps (combustion lamps corresponding to the respective burners) included in the display unit provided on the setting input panels 15 and 16 and / or the top plate 11 are turned on.

  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, and the detection information in the position detection means 4 is read into the control unit 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 closed 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 closure 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. It is. 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 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, the GND terminal of the control unit 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, and the control unit Power supply terminals Vd, GND terminals, and a power supply circuit reaching the negative electrode of the power supply section B are formed. Further, the control unit includes two input terminals V1 and V2 and an output terminal of Vcont.

  When the base current flows through TR3 by turning on the power and TR3 is turned ON and the collector current of TR3 flows, the base current flows through TR1 and TR1 is turned ON to supply power to the control unit. Once power is supplied to the control unit, the control unit 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 continues as 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. When the power switch 17 is pushed in the power supply state to the control unit, the switch S1 is turned on, the base current is supplied to TR4, TR4 is turned on, and TR4 is turned on, so that the input V1 of the control unit is High. Changes from low 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 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 detects the fall of the input V1 (change from High to Low) in the energized state of the control unit, and the power supply Since the switch S1 is turned on in the ON state, it is determined that an operation to turn 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 front state detection unit detects the state before the case removal.

  The second power-off process is a process of storing internal information in the control unit in a nonvolatile memory (for example, EEPROM) provided in the control unit. The internal information in the control unit includes the cumulative use count of the gas stove 1 and the cumulative use time of the stove burner 25 and the grill burner. By storing the cumulative number of times the gas stove 1 is used and the cumulative use time of the stove burner 25 and grill burner in the non-volatile memory, the gas stove 1 can be used even when the power to the control unit is shut off during battery replacement. Can be stored in the control unit, and information on the accumulated usage time of the stove burner 25 and the grill burner can be stored in the control unit. It can be used for notification such as a display that prompts the user for maintenance when the accumulated usage time exceeds a predetermined value.

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

  Once the supply of power to the control unit 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 the base of TR1 flows. Since the current is supplied and the collector current of TR1 continues to flow, the supply of power to the control unit is continued. However, the control unit falls in the energized state of the control unit (falling from High to Low). When the rising of the input V1 (change from Low to High) is detected after detecting the (change), the switch S1 is turned off after being turned on, that is, the user determines that the power-off operation by the power switch 17 is finished. Then, Vcont is changed from High to Low.

  However, if the process for storing the internal information in the control unit described above in a nonvolatile memory (for example, EEPROM) provided in the control unit or the flow control valve closing process is not completed, the internal information in the control unit is controlled. Vcont is changed from High to Low after completion of both the processing stored in the nonvolatile memory (for example, EEPROM) included in the unit and the flow control valve closing processing.

  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 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 two flow control valves fail, safety is impaired.

  Therefore, in the present invention, when the burner is shifted from the combustion state to the combustion stop state, the first check mode for determining whether one of the plurality of flow control valves is malfunctioning is executed. When it is determined that the first check mode has failed, the second check mode is executed to determine whether or not the other flow control valve has failed. Is determined to be faulty, a fault condition treatment is executed. In the following, referring to FIG. 5 in an embodiment in which two flow control valves, the original solenoid valve 27 and the flow control valve 3, are provided. While explaining.

  The control unit opens the full flow control valve (that is, the original electromagnetic valve 27 and the flow control valve 3) when the burner is shifted from the combustion stop state to the combustion state. When the burner is in the combustion state (S1), the operation unit 14 is pushed and fired is commanded to the control unit (S2), and the control unit executes the first check mode when shifting to the combustion stop state. (S3).

  In the first check mode, the flow rate control valve (flow rate control valve 3) other than the one flow rate control valve (original solenoid valve 27) of the flow rate control valves is maintained open, and the flow rate control valve (original solenoid valve) is maintained. 27) is closed (S4), and it is determined whether or not the combustion detecting means detects the stop of combustion (S5). The cooker has time measuring means (may be a timer function or the like provided in the control unit), and when the combustion detecting means does not detect the stop of combustion in (S5), a predetermined time (for example, 10 seconds) has elapsed by the time measuring means. (S6) If it is determined that the predetermined time has elapsed, the process proceeds to (S8), and if it is determined that the predetermined time has not elapsed, the process returns to (S5). When the stop of combustion is detected before the predetermined time has elapsed in (S5), it is determined that the one flow rate control valve (original electromagnetic valve 27) has not failed (S7), and the process ends.

  When the stop of combustion is not detected within a predetermined time, it is determined that the first flow rate control valve (original solenoid valve 27) is in a first failure state (S8), and the error level 1 is set to the nonvolatile memory. (For example, EEPROM) (S9), and the second check mode is executed (S10).

  The second check mode closes one flow rate control valve (flow rate control valve 3) other than the one flow rate control valve (original solenoid valve 27) determined to be out of the total flow rate control valves. (S11), it is determined whether or not the combustion detection means detects the stop of combustion (S12). When the combustion detecting means does not detect the stop of combustion in (S12), it is determined whether or not a predetermined time (for example, 10 seconds) has elapsed by the time measuring means (S13), and it is determined that the predetermined time has elapsed. Then, the process proceeds to (S14), and if it is determined that the predetermined time has not elapsed, the process returns to (S12). When the stop of combustion is detected before the predetermined time has elapsed in (S12), it is determined that the other flow control valve (flow control valve 3) has not failed (S15). The valve opening is prohibited (S18) and the process ends.

  When the stop of combustion is not detected within a predetermined time, it is determined that the other one flow rate control valve (flow rate control valve 3) is in a second failure state (S14), and the error level 2 is set to non-volatile. (S16), the failure state treatment is executed (S17), and the subsequent opening of all the flow control valves is prohibited (S18), and the process is terminated.

  When the subsequent opening of all the flow control valves (the original solenoid valve 27 and the flow control valve 3) is prohibited in (S18), the control unit is as long as the error level stored in the nonvolatile memory is 1 or 2. Continued valve opening is prohibited. Then, by erasing the error level (1 or 2) stored in the nonvolatile memory of the control unit by a dedicated maintenance terminal, all the flow control valves (the original solenoid valve 27 and the flow control valve 3) The prohibition of valve opening is lifted. Note that the dedicated maintenance terminal does not have a user, and if it is not a maintenance person such as a contractor, the prohibition on the opening of all the flow control valves (the original solenoid valve 27 and the flow control valve 3) is canceled. Can not.

  Hereinafter, the failure condition treatment will be described with reference to FIG. The failure condition measure is to prohibit the opening of all flow control valves (original solenoid valve 27 and flow control valve 3) when the two flow control valves (original solenoid valve 27 and flow control valve 3) are out of order. In addition to this, it is intended to ensure further safety by performing such a treatment.

  First, the first failure condition treatment will be described. The gas stove 1 as a cooking device includes a transmission unit (not shown) that transmits an emergency signal to an external device (hereinafter referred to as an external device 5), and the control unit functions as a transmission unit. May be provided. The external device 5 is a device having a function of blocking the internal fuel passage and is not particularly limited. For example, a gas meter is preferably used. The external device 5 includes receiving means (not shown) for receiving an emergency signal. Communication between the transmission means of the gas stove 1 and the reception means of the external device 5 is performed by wire or wireless.

  When the receiving means of the external device 5 receives the emergency signal transmitted by the transmitting means of the gas stove 1, a control unit (not shown) of the external device 5 is provided in the upstream fuel passage outside the gas stove 1. The shut-off means such as a solenoid valve is driven to shut off the internal fuel passage and stop the supply of fuel to the gas stove 1.

  Thereby, when both the original solenoid valve 27 and the flow rate control valve 3 are out of order, the fuel passage may not be closed and the fuel may leak from the gas stove 1. By shutting off the fuel passage by the external device 5, the fuel is prevented from leaking from the gas stove 1, and further safety can be ensured.

  Next, the second failure condition treatment will be described. The gas stove 1 transmits an emergency signal to the communication device 6 instead of the external device 5 such as a gas meter by the transmission means. The point provided with the transmission means and the control unit may have a function as the transmission means. This is similar to the case of the first failure condition treatment. The communication device 6 includes receiving means (not shown) for receiving an emergency signal and transmitting means (not shown) for transmitting an emergency signal, such as a monitoring center installed at another place by the transmitting means. An emergency signal is transmitted to the communication station 61. The transmission means of the gas stove 1 and the reception means of the communication device 6 communicate with each other by wire or wireless, and the transmission means of the communication device 6 and the reception means of the communication station 61 also perform communication by wire or wireless. Further, the emergency signal transmitted by the transmission unit of the communication device 6 may be the same as or different from the emergency signal received by the reception unit.

  When the communication station 61 receives the emergency signal, a guard or an emergency worker rushes to the residence where the gas stove 1 is installed, or the upstream side of the fuel passage to the gas stove 1 The shut-off means such as an electromagnetic valve provided in is directly or remotely operated to shut off the internal fuel passage and stop the supply of fuel to the gas stove 1.

  As a result, when both the original solenoid valve 27 and the flow control valve 3 are out of order, the fuel passage may not be closed and the fuel may leak from the gas stove 1, so that a security guard or an emergency worker Can take appropriate measures such as closing the main plug and shutting off the fuel passage on the upstream side of the gas stove 1 directly or remotely, thereby ensuring further safety. .

  Next, the third failure condition treatment will be described. The gas stove 1 transmits an emergency signal to the ventilator 7 instead of the external device 5 or the communication device 6 by the transmission means, and the point provided with the transmission means or the control unit may have a function as the transmission means. Is the same as in the first and second treatments for fault conditions.

  The ventilator 7 includes receiving means (not shown) for receiving an emergency signal and ventilation means (not shown) for ventilating the air in the room where the gas stove 1 is installed by ventilation.

  Thereby, when both the original solenoid valve 27 and the flow control valve 3 are out of order, the fuel passage is not closed, and there is a possibility that the fuel leaks from the gas stove 1 and fills the room. The indoor air can be ventilated by 7 and the fuel is prevented from filling the room, so that further safety can be ensured.

  Next, the fourth failure condition treatment will be described. The gas stove 1 performs notification by, for example, a voice notification means 8a that emits a voice message (may be a voice notification function provided in the control unit) or, for example, by lighting a lamp or displaying characters, figures, symbols, etc. Display notification means 8b is provided.

  As a fourth measure for the failure state, the control unit prompts the voice notification means 8a to cut off the supply of fuel such as “Please close the main gas valve” or ventilate such as “Ventilate”. Notification of prompting evacuation, such as “Please run away”, may be performed, the combustion lamp as the display notification means 8b blinks violently to notify the abnormality, You may make the character display indicate that the fuel supply should be shut off, such as “Please close the gas main valve”.

  As a result, when both the original solenoid valve 27 and the flow control valve 3 fail and fuel may leak from the gas stove 1, the main plug of the fuel passage is closed or the indoor air is ventilated. , Evacuation can be encouraged, and further safety can be secured.

  Further, the first to fourth failure condition treatments may be arbitrarily combined. The combinations are 1st and 2nd, 1st and 3rd, 1st and 4th, 2nd and 3rd, 2nd and 4th, 3rd and 4th, 1st, 2nd, 3rd, 1st・ There are 11 types: 2nd, 4th, 1st, 3rd, 4th, 2nd, 3rd, 4th, 1st, 2nd, 3rd, 4th.

  Moreover, the fuel for the cooking device is not limited to gas, and may be other fuels including petroleum-based fuel, and 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 3 Flow control valve 31 Main body 31a Cavity 32 Gas inlet 33 Gas outlet 34 Slide closed Child 34a Communication hole 35 Flow rate tip 36 Biasing member 37 Spindle 37a Female screw part 30 Stepping motor 30a Male screw part 4 Position detection means 41 Position detection brush 42 Position detection part 5 External device 6 Communication device 61 Communication station 7 Ventilation device 8a Audio Notification means 8b Display notification means

Claims (5)

A fuel passage for supplying fuel to a burner provided with a combustion detection means, and a flow rate control valve provided with three or more in series in the fuel passage and having a closing function for preventing passage of fuel in the fuel passage, A drive unit that drives the flow rate control valve, and a control unit for driving the drive unit, and the control unit is configured to move all of 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 valves other than the one flow control valve among the flow control valves are kept open and the one flow control valve is closed. When the combustion detection means does not detect the stop of combustion within a predetermined time after closing the one flow control valve, it is determined that the first flow control valve is in a first failure state. The first to When the control mode is executed and the first failure state is determined, the control unit is one flow rate other than the one flow rate control valve determined to be defective among the flow rate control valves. If the combustion detection means does not detect the stop of combustion within a predetermined time after the control valve is closed and the other flow control valve is closed, the other flow control valve has failed. The second check mode for determining the second failure state is further executed, and after the second check mode is executed, all the flow control valves are prohibited from being opened and the second failure state is determined. A cooker characterized in that in some cases a fault condition treatment is performed.   The cooking device according to claim 1, further comprising: a voice notification unit that issues a voice message or a display notification unit that performs notification by display, and performs a failure state treatment that is notified by the voice notification unit or the display notification unit.   The cooking device according to claim 1 or 2, further comprising a transmission means for transmitting an emergency signal, and an external device having a receiving means for receiving the emergency signal outside the cooking appliance and having a function of blocking a fuel passage. A safety system for a cooking device characterized in that when the emergency signal transmitted by the cooking device is received by an external device, the fuel passage is cut off to stop the supply of fuel to the cooking device.   The cooker according to claim 1 or 2 is provided with a transmitting means for transmitting an emergency signal, and further includes a receiving means for receiving the emergency signal, and transmits the emergency signal to a communication center such as a monitoring center installed in another place. A cooker safety system comprising: a communication device provided with a transmission means; and a failure condition treatment for transmitting an emergency signal to a communication station when the communication device receives an emergency signal transmitted from a cooker. .   The cooker according to claim 1 or 2, further comprising: a transmission unit that transmits an emergency signal; and a ventilation device that includes a reception unit that receives the emergency signal and includes a ventilation unit that ventilates indoor air. A safety system for a cooker, wherein a fault condition treatment is performed to ventilate indoor air when the ventilator receives an emergency signal transmitted by.

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