JP6019431B2 - Gas stove device - Google Patents

Description

  The present invention relates to a point fire extinguisher button that performs point fire extinguishing of a gas stove by a pushing operation, and a gas stove device that includes a first contact and a second contact that are turned on according to a push position of the point fire extinguishing button.

  A gas flow control device equipped with an electromagnetic safety valve is known which, when a point fire extinguishing button is pushed in, moves the valve shaft to the back and forcibly opens the valve body of the electromagnetic safety valve at the tip of the valve shaft. ing. In such a gas flow rate control device, a valve body that is a main valve is further attached in the middle of the valve shaft, and when the fire extinguishing button is pushed in, the main valve is opened first, and further pushing in so that the electromagnetic safety valve is opened. (See, for example, Patent Document 1).

  In this device, there are provided two contacts that are turned on when the point fire button is pushed in. The first contact is turned on when the main valve is opened, and the remaining second contact is an electromagnetic safety valve. It is set to turn on when the valve opens.

  Therefore, when the first contact is turned on and the second contact is turned on, the sparker is operated to ignite the gas burner. After that, when the first contact is turned off, the main valve is closed and the gas burner is turned on. It is possible to detect a state in which the supply of gas to the gas generator is stopped, that is, that the gas burner is in a fire extinguishing state.

JP 2010-196937 A (paragraph 0025)

  In the conventional gas stove apparatus, power is supplied from an external commercial power source. Therefore, even after the power switch is turned on, the control unit continues to be energized until the power switch is turned off again. There is no risk of the power supply running out. However, since the control unit continues to be energized even when not in use, it is not desirable from the viewpoint of energy saving. Also, if the power for operation is set to be supplied from the built-in dry battery rather than from the external commercial power supply, the operation to increase or decrease the opening degree of the thermal power control device by the thermal power control operation does not consume much power, A large amount of electric power is required for the operation of forcibly opening the valve body of the electromagnetic safety valve during the ignition operation.

  Therefore, if the electric power for operation is supplied from a built-in dry battery, and further, the electromagnetic safety valve is manually opened at the time of ignition, and the subsequent heating power adjustment operation is performed by a motor, the ignition operation is performed. It is desirable not to energize the control unit until it is performed, and to energize the control unit from the start of ignition operation until extinguishing.

  However, with this configuration, unenergized raw gas is ejected from the gas burner unless the igniter is operated immediately after energization of the control unit is started by starting the ignition operation.

  On the other hand, if the opening degree of the thermal power control device at the time when the igniter is activated is not a thermal power suitable for ignition, that is, an opening corresponding to the ignition thermal power, it is surely ignited if there is too little gas supply to the gas burner. If ignition cannot be performed and a gas supply amount is excessive, conversely, an explosion that produces a loud noise during ignition, or a flame overflowing from the pan or the like to the outside after firing occurs.

  In order to prevent such inconvenience, as in the above-described conventional one, the origin of the motor is determined after the energization of the control unit is started, and then the opening corresponding to the ignition heating power is adjusted. As described above, there is a problem that the raw gas continues to be ejected from the gas burner.

  Therefore, in order to reduce the amount of raw gas jetted as much as possible until ignition is performed after the control unit is energized by the ignition operation, the thermal power is stopped before the energization to the control unit is stopped after the previous fire extinguishing. It is desirable to configure so that the power supply to the control unit is stopped after the opening of the adjusting unit is initialized to an opening corresponding to the ignition heating power for the next ignition.

  In addition, since the energization to the control unit is stopped, the fact that the initialization is completed is stored in the volatile memory, so the stored contents are lost due to the deactivation of the energization, so that the initialization is stored in the non-volatile memory. There is a need to.

  However, because initialization was not completed due to some abnormality at the time of the previous fire extinguishing, if non-initialized data was written when the non-volatile memory was read when the control unit was energized next time, the thermal power control The igniter should not be operated because the opening of the part does not correspond to the ignition thermal power, but the electromagnetic safety valve is opened manually, so in that case the electromagnetic safety valve was held open In this case, there is a problem that raw gas leaks.

  Accordingly, in view of the above-described problems, the present invention provides a gas stove device that can reduce the leakage of raw gas as much as possible when it is not initialized at the time when energization to the control unit is started. Is an issue.

  In order to solve the above problems, the gas stove device according to the present invention ignites the gas burner by pushing from the fire extinguishing position to the ignition position, and then maintains the combustion of the gas burner in a state where the gas burner returns to the combustion position, and pushes again from the combustion position. A point fire extinguishing means for returning to the initial fire extinguishing position and extinguishing the gas burner is provided. The valve body is forcibly opened while the point fire extinguishing means is pushed to the ignition position, and the valve body is held in the valve open state. An electromagnetic safety valve including an electromagnet, a thermal power control unit that is connected in series to the electromagnetic safety valve, and is driven by an electric actuator to adjust the thermal power by increasing or decreasing the amount of gas supplied to the gas burner; There are provided a first contact that is turned on while pushing the means from the fire extinguishing position to the ignition position and a second contact that is turned on when reaching the ignition position. In the gas stove device in which energization to the control unit is started when the first contact is turned on and holding current is started to be applied to the electromagnet of the electromagnetic safety valve and the igniter is operated when the second contact is turned on, the gas burner When the first contact is turned off after the fire extinguishing operation is performed, the control unit drives the electric actuator to initialize the opening of the thermal power control unit to an opening corresponding to the ignition thermal power in preparation for the next ignition. At the same time, after the initialization is written in the nonvolatile memory, the energization to the control unit itself is stopped, and the energization to the control unit is started by turning on the first contact at the next ignition. The control unit reads the nonvolatile memory, and if it is determined that the opening degree of the thermal power control unit is not the opening degree corresponding to the ignition thermal power, While prohibiting the energization of the holding current to the magnet, characterized in that it stands by prohibiting the operation of the igniter be the second contact is on.

  When it is not initialized, the gas burner is not ignited, but energization of the electromagnet of the electromagnetic safety valve is prohibited so that the electromagnetic safety valve is not held open.

  In addition, when it is not initialized in this way, it becomes possible to use a gas burner again by initializing. Therefore, when the opening of the thermal power control unit is not the opening corresponding to the ignition thermal power when the first contact is turned on, the initialization may be performed immediately, or the first contact may be performed. When the opening of the thermal power control unit is not the opening corresponding to the ignition thermal power at the time of turning on, initialization may be performed after the first contact is turned off by the fire extinguishing operation.

  As is apparent from the above description, the present invention prohibits energization of the electromagnet of the electromagnetic safety valve when energization to the control unit is started at the time of ignition operation and initialization of the thermal power control unit is not completed at that time. When the point-extinguishing button returns to the front from the ignition position, the electromagnetic safety valve is closed and the leakage of raw gas from the gas burner is stopped. Therefore, the amount of raw gas leakage can be reduced as much as possible.

The perspective view which looked at the gas stove by this invention from the front The figure which shows the piping state in a gas stove Perspective view of thermal power control device The figure which shows the operation state of the micro switch which is a position sensor Flow chart showing operation when initialization is not completed during ignition operation

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  Details of the ignition operation will be described with reference to FIG. As described above, when the operation knob 4 is pushed in for ignition operation, the first contact SW1 is turned on before the operation knob 4 reaches the ignition position, and energization of the control unit is started by turning on the first contact SW1. (S1). Then, the control unit immediately reads the value of the parameter M1 stored in the EEPROM that is a non-volatile memory built in the control unit (S2). As the parameter M1, “1” is written when the opening degree of the thermal power control unit 3 is an opening degree corresponding to the ignition heating power at the time of the previous fire extinguishing operation, and “0” is set when the opening degree is other than that. "Is written.

  Normally, 1 is written to the parameter M1 at the time of the fire extinguishing operation. Therefore, 1 should be written to the parameter M1 at this time. If 1 is written in the parameter M1, the opening degree of the thermal power control unit 3 is an opening degree corresponding to the ignition thermal power, so that the gas burner is ignited by operating the igniter (S2 → S3). When it is confirmed that the ignition is performed (S4), the igniter is turned off (S5), and the ignition is completed. After that, the heating power is adjusted and cooking with a gas burner is performed.

  The above is a normal ignition operation. However, if the initialization is not completed due to some trouble at the time of the previous fire extinguishing, the value of the parameter M1 becomes other than 1, that is, 0 at the time of S2, and the thermal power control unit 3 Is not the opening corresponding to the ignition heating power, and energization of the holding current to the electromagnetic safety valve (SV) is prohibited (S6). As a result, the electromagnetic safety valve is prevented from being held open and kept open thereafter. Subsequently, the operation of the igniter is prohibited (S7). Thereby, even if the second contact SW2 is turned on after that, the igniter does not operate and the gas burner is prevented from being ignited. Subsequently, error notification is started (S8). This error notification may be either buzzer sound or LED display.

  At this time, since the opening degree of the thermal power control unit is not the opening degree corresponding to the ignition thermal power, initialization is started (S9), and when initialization is completed (S10), error notification is stopped (S11). Wait as it is.

  In order to escape from the standby state, it is necessary to push the operation knob 4 again to return the operation knob 4 to the initial fire extinguishing position. Then, when the operation knob 4 returns to the fire extinguishing position in this way, the first contact SW1 is turned off, so that energization to the control unit is stopped and the control unit is reset.

  In S11, the error notification is stopped when the initialization is completed, but the error notification may be continued without stopping, and the error notification may be stopped by resetting the control unit. Since the initialization is already completed in S10 at the time when the control unit is reset, 1 is written in the parameter M1. Therefore, if the ignition operation is performed again, this time, the flow flows from S2 to S3, and finally the ignition is normally completed.

  In the above description, when the parameter M1 is not 1, the initialization is immediately performed in S9 and S10. However, as in the normal fire extinguishing operation, here, only the error notification is performed without performing the initialization, and from the standby state. You may make it stop electricity supply to a control part, after performing initialization when a fire extinguishing operation is performed.

  In the above embodiment, one operation knob is provided with both the point fire extinguishing function and the thermal power adjustment function. However, the point extinguishing function is performed by the operation knob, and the thermal power adjustment function is a separate operation such as a tactile switch. You may make it carry out by a part.

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

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

Claims (3)

  Point-extinguishing means that ignites the gas burner by pushing from the fire extinguishing position to the ignition position, then maintains the combustion of the gas burner in a state where it has returned to the combustion position, and returns to the initial fire extinguishing position by pushing again from the combustion position to extinguish the gas burner An electromagnetic safety valve including a valve body that is forcibly opened when the point-extinguishing means is pushed to the ignition position, and an electromagnet that holds the valve body in the open state. Are connected in series and driven by an electric actuator to increase / decrease the amount of gas supplied to the gas burner to adjust the thermal power, and to turn on while the point-extinguishing means is pushed from the fire extinguishing position to the ignition position. A first contact and a second contact that is turned on when the ignition position is reached are provided. When the first contact is turned on, energization of the control unit is started. In addition, in the gas stove device in which the igniter operates when the second contact point is turned on when the electromagnet of the electromagnetic safety valve is started, when the gas burner is extinguished and the first contact point is turned off, the control unit The electric actuator is driven to initialize the opening of the thermal power control unit to an opening corresponding to the ignition thermal power in preparation for the next ignition, and after the initialization is written to the nonvolatile memory, the control unit When the power supply to the control unit is started by turning on the first contact at the next ignition, the control unit reads the non-volatile memory and the opening degree of the thermal power control unit ignites. When it is determined that the opening does not correspond to thermal power, energization of the holding current to the electromagnet of the electromagnetic safety valve is prohibited and the second contact point Stove apparatus characterized by also turned on to wait while prohibiting the operation of the igniter.   2. The gas stove device according to claim 1, wherein the initialization is immediately performed when the opening degree of the thermal power control unit is not an opening degree corresponding to the ignition thermal power when the first contact is turned on.   The initialization is performed after the first contact is turned off by a fire extinguishing operation when the opening of the thermal power control unit is not an opening corresponding to the ignition thermal power when the first contact is turned on. Item 10. A gas stove device according to Item 1.

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