JP6410318B2 - Gas stove device - Google Patents

Description

  The present invention has a pan bottom sensor that detects that a cooking utensil is placed on the burner, and the ignition operation is performed on the burner in a state where the pan bottom sensor does not detect that the cooking utensil is placed. In particular, the present invention relates to a gas stove device provided with ignition prohibiting means for prohibiting ignition of a burner.

  In the gas stove device, the burner is exposed on the top plate, which is the upper surface of the device. Therefore, if ignition is performed without placing the cooking utensil on the burner, the entire flame is exposed, which is not preferable for safety. Therefore, a pan bottom sensor for detecting that the cooking utensil is placed on the burner is provided, and an ignition prohibition means is provided that does not ignite the burner even if an ignition operation is performed without the cooking utensil being placed. .

  However, there is a case where it is desired to ignite the burner temporarily without placing the cooking utensil on the burner, for example, when laver is applied. For such a case, if a forced ignition switch is provided, a normal ignition operation is performed in advance, and the forced ignition switch is pushed in a state where ignition of the burner is prohibited by the ignition prohibition means, There is known a technique in which ignition prohibition is canceled and the burner is ignited (see, for example, Patent Document 1).

  However, in this gas stove device, when the burner is ignited without placing the cooking utensil on the burner, the burner is not ignited even if a normal ignition operation is performed, and then the burner is ignited by pressing the forced ignition switch. Is done. For this reason, the burner is not ignited by the familiar ignition operation of pushing in the fire extinguisher button, and the burner is ignited by a push operation on the forced ignition switch that is completely different from the normal ignition operation. Become. In particular, since the cooking utensil is not placed on the burner, it feels like a flame generated by ignition suddenly occurs, so that the feeling of use becomes very bad.

  Therefore, the present applicant, as Japanese Patent Application No. 2014-250774, is provided with a forced ignition switch that is turned on only during the push operation, and the ignition operation is performed while the forced ignition switch is being pushed, When the forced ignition switch is in an on state at the start of energization of the control unit, an application has been filed in which ignition prohibition by the ignition prohibiting means is canceled and ignition of the burner is permitted.

JP 2013-234664 A ([0015], FIG. 2, FIG. 3)

  However, in the previous application, the ignition of the burner is permitted when the forced ignition switch is being pressed at the time of ignition. However, when a failure that is always in the on state has occurred, there arises a problem that even if the forced ignition switch is not actually pressed, the operation is the same as when the forced ignition switch is pressed.

  In view of the above-described problems, an object of the present invention is to provide a gas stove device that does not cause a problem even when a forced ignition switch that is turned on at the time of ignition is failed.

  In order to solve the above problems, the gas stove device according to the present invention has a pan bottom sensor that detects that a cooking utensil is placed on the burner, and this pan bottom sensor does not detect that the cooking utensil is placed. In a gas stove device provided with an ignition inhibiting means for prohibiting ignition to the burner when an ignition operation is performed on the burner in a state, a control unit for controlling ignition to the burner is provided, and the control unit is controlled during the ignition operation. The forced ignition switch that is turned on only during the push operation is provided, and it is determined that an on failure has occurred in the forced ignition switch from the on state of the forced ignition switch. In this case, a non-volatile memory for storing the occurrence of an on-failure is provided, and the ignition operation is performed while the forced ignition switch is being pressed, and the control unit starts energizing. If the forced ignition switch is in an on state at the time when the on-failure occurrence is not stored in the nonvolatile memory, the ignition prohibition by the ignition prohibiting means is canceled and the burner is ignited. It is characterized by permission.

  Rather than igniting the forced ignition switch alone, it is controlled by pushing the forced ignition switch as an auxiliary to the ignition operation and performing the same operation as the normal ignition operation with the forced ignition switch being pushed. Energization of the burner is started, and the controller permits the burner to be ignited when the forced ignition switch is in an on state at the start of energization. However, when the forced ignition switch is on-failed, the control unit determines that the forced ignition switch is being pushed even if the forced ignition switch is not actually pushed. Therefore, when it is determined from the on state of the forced ignition switch that an on failure has occurred in the forced ignition switch, a non-volatile memory for storing the on failure occurrence is provided, and when the energization is started in the control unit, When the ignition switch is in the ON state and the occurrence of an ON failure is not stored in the nonvolatile memory, the ignition prohibition by the ignition prohibition means is canceled and the burner ignition is permitted. .

  Specifically, when the time for which the forced ignition switch is on is counted and the time exceeds the on-failure judgment time, or when the forced ignition switch is on at the time of extinction Then, it is determined that an on-failure has occurred in the forced ignition switch.

  In addition, if the cooking utensil is placed on Gotoku, even if the forced ignition switch is on-failed, no malfunction occurs due to the ignition of the gas burner. Therefore, if the pan bottom sensor detects that a cooking utensil is placed, it is desirable to permit ignition of the burner even if an on-failure occurrence is stored in the nonvolatile memory.

  It should be noted that it is desirable to be able to erase the occurrence of an on-failure stored in the non-volatile memory by a manual operation on the gas stove device, for example, when the on-failed forced ignition switch is replaced.

  In addition, if the forced ignition switch changes from the on state to the off state, it is conceivable that the occurrence of the on failure stored in the nonvolatile memory is erased.

  As is clear from the above description, the present invention permits the ignition of the burner by performing a normal ignition operation in a state where the forced ignition switch is pushed, so that the cooking utensil is placed on the burner. If not, the burner can be ignited without discomfort. When the forced ignition switch is on-failed, the burner is not ignited, thereby preventing an unexpected operation of the user.

The figure which shows the external appearance of the gas stove apparatus by this invention Block diagram showing the gas pipeline to the burner Block diagram showing the configuration around the control unit Diagram showing control blow by control unit

  Referring to FIG. 1, reference numeral 1 denotes a gas stove device according to the present invention. The top plate 11 of the gas stove device 1 is provided with two left and right burners 12. Both the burners 12 are annular, and a pan bottom sensor 13 is provided in a central space extending from the bottom to the top. A temperature sensor is built in the upper end of the pan bottom sensor 13 and is held movably in the vertical direction while being biased upward. For example, when the frying pan FP is placed above the burner 12 as a cooking utensil, the upper end of the pan bottom sensor 13 is pushed downward while being in close contact with the pan bottom B of the frying pan FP by an urging force.

  When cooking is started with the frying pan FP placed in this manner, the fire extinguishing button 2 is pushed in. Then, the burner 12 is ignited and cooking can be started. In addition, the thermocouple 14 is arrange | positioned in the vicinity of the burner 12, The confirmation of the ignition of the burner 12 and generation | occurrence | production of extinction, etc. can be detected by detecting the flame of the burner 12 with this thermocouple 14. Reference numeral 10 denotes a battery box, which is configured to cover the operating power of the gas stove device 1 with a dry battery housed in the battery box 10.

  A forced ignition switch 3 is provided above the point fire extinguishing button 2. This forced ignition switch 3 is a switch for permitting ignition of the burner 12 even when the cooking utensil is not placed on the burner 12, and is pushed when performing, for example, “burring”. “Aburi” refers to an operation of, for example, laver with nori in a state where no cooking utensils are placed. Further, the forced ignition switch 3 is also pressed when cooking “high-temperature stir-fry”.

  “High-temperature stir-fry” cooking is cooking in which the temperature of the bottom B is normally high enough to correspond to emptying, for example, frying with a very small amount of food in a frying pan FP This is the case. In addition, 31 is LED.

  Referring to FIG. 2, when the point fire extinguishing button 2 is pushed in, the operation rod 22 a of the heating power adjustment device 22 is pushed into the heating power adjustment device 22. The thermal power adjusting device 22 is provided with two micro switches SW1 and SW2 (not shown), and the SW1 is turned on in the middle of the movement of the operation rod 22a. Is turned on. Note that the valve body of the electromagnetic safety valve 23 is forcibly opened at the push-off position where the switch SW2 is turned on, and in this state, the valve body is attracted and held by the electromagnet in the electromagnetic safety valve 23.

  When the electromagnetic safety valve 23 is opened, gas flows into the thermal power control device 22 and flows out through the thermal power control device 22 toward the burner 12. The outflow rate is increased or decreased by operating the heating power adjustment lever 21.

  The gas flowing out from the thermal power control device 22 flows to the first on-off valve 24. An orifice 25 is connected to the first on-off valve 24 in parallel. If the first on-off valve 24 is in an open state, the gas flows further downstream without being throttled, but the first on-off valve 24 When the valve is closed, a small amount of gas defined by the orifice 25 flows downstream. Further, a second on-off valve 26 is provided downstream, and no gas is supplied to the burner 12 if the second on-off valve 26 is closed. The pan bottom sensor 13 is provided with a micro switch 13a. When a cooking utensil such as a frying pan FP is placed and the pan bottom sensor 13 is pushed down as described above, the micro switch 13a is turned on and the cooking utensil is turned on. Can be detected as being placed on the burner 12.

  Referring to FIG. 3, a control unit 4 is provided in the gas stove device 1, and holds the opening of the electromagnetic safety valve 23, opens / closes the first on / off valve 24 and the second on / off valve 26, and operates the sparker 15. At the same time, an ON signal is input to the micro switch SW2 and the micro switch 13a, and a temperature detection signal is input from the pan bottom sensor 13 and the thermocouple 14.

  With reference to FIG. 4, the control content by the control part 4 is demonstrated. When performing the ignition operation, if the normal cooking is to be performed, the fire extinguishing button 2 is pressed, and if the ignition is performed without the cooking utensil being placed, the forced ignition switch 3 (ring Press and operate the fire extinguishing button 2 in a state where the high-temperature stir-fry SW is pressed (PS). In any case, since the control unit 4 is not energized, the control unit 4 cannot detect what operation is being performed by the PS.

  When the point-extinguishing button 2 is pushed, SW1 is turned on during the pushing operation, and power from the dry battery is applied to the control unit 4 at that time. Then, the control unit 4 immediately confirms whether the forced ignition switch 3 (Aburi Hot Fried SW) is on (S1a). This forced ignition switch 3 (Aburi high-temperature fried SW) is a non-locking switch that performs a momentary operation, and is turned on only during the pushing operation, and returns to the off state when the pushing operation is stopped. During normal cooking, as described above, the forced ignition switch 3 (Aburi Hot Fried SW) is not turned on.

  However, when the forced ignition switch 3 is in an on failure, the forced ignition switch 3 is in an on state even if the pushing operation is not performed. Therefore, a non-volatile memory such as an EEPROM is provided, and it is determined whether or not an on-failure has been stored in the non-volatile memory (S1b).

  If the on-failure information is not stored, the process proceeds to S100, but if the blowout high temperature switch 3 is not turned on or if the on-failure information is stored in the nonvolatile memory, the process proceeds to S2.

  Proceeding to S2, it is confirmed whether or not the micro switch 13a (no pan detection switch) is turned on. In addition, even if the forced ignition switch 3 (Aburi hot stir fry SW) is kept pressed, if the hand is released during the ignition operation, the normal ignition is performed without pressing the forced ignition switch 3 (Aburi hot stir fry SW). Since this is the same as the operation, the process proceeds to S2. Here, if the micro switch 13a (no pan detection switch) is off, the ignition operation has been performed without placing the cooking utensil, so the burner 12 is not ignited and ignition is prohibited (S3). This corresponds to the ignition prohibition means.

  On the other hand, if the micro switch 13a (no pan detection switch) is on, the cooking utensil is placed on the burner 12, so the first on-off valve 24 is opened to increase the heating power and the second on-off. The valve 26 is opened, and the sparker 15 is further operated to ignite the burner 12 (S4). When ignition of the burner 12 is confirmed by a detection signal from the thermocouple 14 (S5), the routine proceeds to normal thermal power control (ND). In this normal thermal power control (ND), the micro switch 13a (no pan detection switch) is constantly monitored (S6), and when the cookware is lifted and the micro switch 13a (no pan detection switch) is turned off, the normal thermal power is controlled. Control (ND) is exited, the first on-off valve 24 is closed, the gas flow rate is reduced by the orifice 25, and the heating power is reduced to low heat (S8). Further, in the normal thermal power control (ND), the forced ignition switch 3 (Aburi high temperature frying SW) is constantly monitored, and when the forced ignition switch 3 (Aburi high temperature frying SW) is continuously pressed for 3 seconds, The process shifts to high-temperature thermal power control (HD) described later (S7).

  When the cooking utensil is lifted by normal thermal power control (ND) and the state continues for 60 seconds (S9), the burner 12 is extinguished as a panless error (S12), but the cooking utensil is mounted again within 60 seconds. Then, the first on-off valve 24 is opened to return the heating power to a strong fire, and the normal heating power control (ND) is restored (S10, S11).

  Returning to the beginning of this flow, if the forced ignition switch 3 (Aburi Hot Stir Fry SW) is on when the control unit 4 is turned on, the process proceeds to S100 and the first on-off valve 24 is opened. Ignition is performed in the state. In this state, the oil overheat prevention function is still set to the normal mode. This oil overheat prevention function is a function of monitoring the pan bottom temperature of the cooking utensil with the pan bottom sensor 13 and adjusting the heating power by opening and closing the first on-off valve 24 so that the pan bottom temperature does not exceed the overheating temperature.

  Subsequently, if the forced ignition switch 3 (Aburi hot stir-fry SW) is in an on state for 3 seconds or longer (S101, S102), the temperature controlled by the oil overheat prevention function can be raised and high-temperature fried cooking can be performed. Switch to the high temperature mode (S103). When the micro switch 13a (no pan detection switch) is turned off, the function of lowering the heating power is canceled and the high heat is maintained (S104). Although not shown in this flow, such high-temperature thermal power control (HD) automatically extinguishes the burner 12 after 30 minutes. Further, during the transition to the high-temperature thermal power control (HD), the LED 31 is turned on or blinked to notify that the high-temperature thermal power control (HD) state is entered.

  When the forced ignition switch 3 (Aburi Hot Fried SW) is pressed in the high-temperature thermal power control (HD) state (S105), the high-temperature thermal power control (HD) is escaped and the oil overheat prevention function is returned to the normal mode. After that (S106), the routine proceeds to the above-described normal thermal power control (ND). If the forced ignition switch 3 is in the ON state for 15 seconds, it is determined that an ON failure is to occur in the forced ignition switch 3, and the occurrence of the ON failure is stored in the nonvolatile memory and the operation is stopped in the abnormal state. (S107, S108). When it is determined that an on failure has occurred, the occurrence of an on failure is notified by a lamp or buzzer provided in the gas stove device 1.

  In addition, when the forced ignition switch 3 (Aburi hot fried SW) is turned off before 3 seconds have passed in S101, after confirming the ignition in S5, the routine shifts to normal thermal power control (ND).

  In this case, the flow may be controlled not to flow to S5 but to flow to S3 and prohibit ignition only during the ignition operation.

  By the way, a switch for resetting the non-volatile memory may be provided in the gas stove device, and this reset switch may be manually operated to erase the occurrence of the on-failure stored in the non-volatile memory.

  Further, when the forced ignition switch changes from an on state to an off state, the occurrence of an on failure stored in the nonvolatile memory may be deleted.

  Incidentally, in the flow shown in FIG. 4, the burner 12 was ignited in advance in S100 before confirming that the forced ignition switch 3 (the high-temperature frying SW) was pressed for 3 seconds in S102. The ignition may not be performed at this timing, and it may be changed to ignite the burner 12 after confirming that the forced ignition switch 3 (Aburi Hot Fried SW) has been pressed for 3 seconds in S102.

  Further, when the on-failure information is stored in the non-volatile memory in S1b, the process proceeds to S2, but in that case, control may be performed so as not to proceed to S2 and to prohibit subsequent ignition.

  By the way, in the above embodiment, if the forced ignition switch 3 is in the ON state for 15 seconds, it is determined that an ON failure is to occur in the forced ignition switch 3, and the occurrence of the ON failure is stored in the nonvolatile memory. However, if the forced ignition switch 3 is in an on state at the time of extinguishing the fire, it is determined that an on failure is to occur in the forced ignition switch 3, and the occurrence of the on failure may be stored in the nonvolatile memory. .

  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 stove device 2 Point fire-extinguishing button 3 Forced ignition switch 4 Control part 12 Burner 13 Pan bottom sensor 21 Thermal power control lever 22 Thermal power control device 23 Electromagnetic safety valve 24 1st on-off valve 25 Orifice 26 2nd on-off valve

Claims (5)

  When there is a pot bottom sensor that detects that a cooking utensil has been placed on the burner, and this pan bottom sensor does not detect that the cooking utensil has been placed, and the burner is ignited, to the burner In the gas stove device provided with the ignition inhibiting means for inhibiting the ignition of the burner, the gas stove device includes a control unit that controls ignition of the burner, and is configured to start energization to the control unit during the ignition operation. A forced ignition switch that is turned on only during operation is provided, and a nonvolatile memory is provided to store the occurrence of an on failure when it is determined that an on failure has occurred in the forced ignition switch from the on state of the forced ignition switch. The forced ignition switch is in an on state when the ignition operation is performed while the forced ignition switch is pressed and the controller is energized. And stove apparatus and permits when ON failure occurs in the nonvolatile memory is not stored, the ignition of the burner to release the ignition prohibition by the ignition inhibiting means.   The forced ignition switch is turned on when the duration of the forced ignition switch is on and the measured time exceeds the on-failure judgment time or when the forced ignition switch is on at the time of extinction. The gas stove device according to claim 1, wherein it is determined that an on-failure has occurred.   The burner is allowed to ignite even if an on-failure occurrence is stored in the non-volatile memory if the pan bottom sensor detects that a cooking utensil is placed. The gas stove device according to claim 2.   The gas stove device according to any one of claims 1 to 3, wherein an on-failure occurrence stored in the non-volatile memory can be erased by a manual operation on the gas stove device.   5. The on-failure occurrence stored in the non-volatile memory is erased when the forced ignition switch changes from an on state to an off state. Gas stove device.

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