JP2017015266A - Gas heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas heating cooker surely performing ignition resulting from operation of an ignition operating unit.SOLUTION: A gas heating cooker includes: a relief valve 32 that starts opening in association with operation of an ignition operation unit, and is kept opened by electrification in a valve opening completion state; an ignition switch 8 configured to detect operation of the ignition operation unit; and a control unit 6 configured to perform ignition operation to gas supplied through the relief valve with operation detection of the ignition switch. The relief valve is made into the valve opening completion state after operation detection of the ignition switch. The control unit performs ignition operation after elapse of a first predetermined time from operation detection of the ignition switch.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a gas heating cooker.

  In a gas cooking device such as a gas stove, generally, when the ignition operation unit is operated and ignited, the valve is opened along with the operation of the ignition operation unit, and the ignition switch detects the ignition operation and the igniter and ignition An ignition operation unit including a plug is caused to perform an ignition operation.

JP 2011-047555 A

  During the above ignition operation, it takes a while until the valve is fully opened and the gas flow is stabilized, but the operator of the ignition operation should start the discharge from the spark plug when the igniter of the ignition operation unit is activated. Even in a state where the gas flow is not stable and ignition has not yet been performed, the operation of the igniter is often stopped by releasing the hand from the ignition operation unit. At this time, a non-ignition state occurs, so the ignition operation must be performed again.

  This invention is made | formed in view of the said problem, and makes it a subject to provide the gas heating cooker by which ignition by operating an ignition operation part is performed more reliably.

  A gas heating cooker according to the present invention includes a safety valve that starts to open in response to operation of an ignition operation unit and is maintained open by energization when the valve is open, and an ignition switch that detects operation of the ignition operation unit. A gas heating cooker that receives an operation detection of the ignition switch and performs an ignition operation on the gas supplied through the safety valve, wherein the safety valve is in the valve opening completion state after the operation detection of the ignition switch In addition, the control unit is characterized in that an ignition operation is performed after a first predetermined time has elapsed since the operation detection by the ignition switch.

  The first predetermined time is preferably longer than a time from when the operation of the ignition switch is detected until the safety valve is in the valve opening completion state.

  In addition, when the control unit performs the initial process by starting the power supply with the start of the operation of the ignition operation unit, a second time shorter than the first predetermined time is detected from the operation detection by the ignition switch. It is preferable to perform the ignition operation when a predetermined time has elapsed.

  According to the present invention, even when the ignition switch detects the operation of the ignition operation operating portion, the ignition operation is started with a delay, so that the gas flow is stable during the ignition operation. Even if the operator recognizes the ignition operation and releases his / her hand from the ignition operation section, the gas is almost certainly ignited and hardly causes a non-ignition state.

It is a perspective view of the gas heating cooking appliance in an example of an embodiment of the invention. It is a piping diagram which shows arrangement | positioning of a valve same as the above. It is sectional drawing which shows the time of the non-ignition of a valve unit same as the above. It is sectional drawing which shows the time of ignition of a valve unit same as the above. It is sectional drawing which shows the state at the time of combustion of a valve unit same as the above. It is a time chart which shows the operation timing of an igniter same as the above.

  Hereinafter, one embodiment of the present invention will be described in detail with reference to the illustrated examples. The gas heating cooker 1 in the illustrated example includes three stove burners 2a, 2b, and 2c on a top plate 11 that constitutes a top surface portion. The built-in gas stove with a grill inside. Each stove burner 2a, 2b, 2c includes a burner 20, five virtues 21, a spark plug 22, and an ignition detection device 23 (see FIG. 3). The stove burners 2 a and 2 b in the illustrated example include a temperature sensor 24 in the center of the burner 20. An exhaust part 26 for grill is provided at the rear part of the top surface part.

  The spark plug 22 discharges and ignites when a high voltage pulse generated by an igniter (not shown) is applied, and constitutes an ignition operation unit together with the igniter. The igniter is controlled by the control unit 6.

  The ignition detection device 23 is composed of a thermocouple, detects ignition with a thermoelectromotive force generated by the heat of the flame, and transmits it to the control unit 6.

  The temperature sensor 24 is configured to detect the temperature of the cooking container by abutting against the lower surface of the cooking container when the cooking container is placed on the Gotoku 21, and is constituted by a thermistor. It is sent to the part 6 and used for combustion control.

  The grill has an opening that opens to the front surface of the gas heating cooker 1 that can be opened and closed by a grill door 25 and includes a grill burner (not shown). In addition, an ignition plug and an ignition detection device are disposed in the vicinity of the grill burner, and a temperature sensor for detecting the temperature in the warehouse is also disposed.

  Panels P1 to P4 are arranged on the left and right sides of the front surface 12 of the illustrated gas heating cooker 1, and the panel P1 has an ignition / extinguishing point fire extinguishing button 13a and a heating power adjustment button. A thermal power adjustment lever 14a, a point fire extinguishing button 13c for ignition / extinguishing the stove burner 2c, and a thermal power adjustment lever 14c for thermal power adjustment are arranged. On the panel P2, a fire extinguishing button 13d for ignition / extinguishing the grill burner, a fire extinguishing button 13b for ignition / extinguishing the stove burner 2b, and a thermal power adjusting lever 14b for adjusting the thermal power are arranged.

  The panels P3 and P4 are movable so-called kangaroo pockets, and when pulled out to the front, the cooking content input unit and the display unit when the control unit 6 performs the combustion control according to the cooking content appear. However, description on this point is omitted here.

  FIG. 2 shows the gas flow path. A safety valve 32, a main valve 33, an on-off valve 35, and a flow rate adjusting valve 34 are connected in series to the burner 20 of the stove burner 2a, and an orifice 37 is connected in parallel to the on-off valve 35.

  A safety valve 32, a main valve 33, an on-off valve 35, and a flow rate adjusting valve 34 are connected in series to the burner 20 of the stove burner 2b, and an orifice 37 is connected in parallel to the on-off valve 35. An on-off valve 36 and an orifice 38 are connected in parallel with the valve 35.

  A safety valve 32, a main valve 33, and a flow rate adjusting valve 34 are connected in series to the burner 20 of the stove burner 2c. A safety valve 32 and a main valve 33 are also connected to the grill burner.

  Here, the main valve 33 is mechanically opened and closed, the flow rate adjusting valve 34 is also mechanically adjusted, whereas the on-off valves 35 and 36 are electromagnetically opened and closed, and the safety valve 32 is mechanically opened and closed. In addition, the valve open state is electromagnetically maintained.

  FIG. 3 shows a valve unit 3 having valves for the stove burner 2b. This valve unit 3 includes the above-described valves arranged in a body 30 having a flow path from a gas inlet 301 to a gas outlet 302. A slider 31 interlocked with a fire extinguishing button 13b, and a slider 31 The valve rod 39 is connected, and the needle 300 that is linked to the heating power adjusting lever 14b is provided. The burner 20 is connected to the gas outlet 302.

  The slider 31 is pushed rearward when the fire extinguishing button 13b whose upper end is pivotally supported is pushed backward. At this time, the valve rod 39 is also pushed simultaneously, and the main valve 33 provided in the valve rod 39 is pushed. Is opened, and the instrument plug switch 27 (see FIG. 6) arranged on the side is turned on to turn on the power to the control unit 6. Further, when the point-extinguishing button 13b is pushed further deeply (state shown in FIG. 4), the tip of the valve rod 39 retracts the safety valve 32 and the safety valve 32 is also opened.

  The slider 31 that is spring-biased toward the front side maintains a state (a state shown in FIG. 5) that is slightly returned from a state where it is pushed most by a so-called heart cam mechanism. In this state, the main valve 33 remains open, and the safety valve 32 is essentially closed because the valve rod 39 is separated from the safety valve 32. However, if the burner 20 is ignited, the ignition detection device 23 , The controller 6 keeps the safety valve 32 open electromagnetically.

  Then, if the fire extinguishing button 13b is pressed again from the state shown in FIG. 5, the slider 31 returns to the state shown in FIG. 3, and the main valve 33 (and the valve rod 39) also returns due to the spring bias. The gas supply to the burner 20 is shut off. When the burner 20 is extinguished when the gas supply is shut off, the safety valve 32 receives an electromagnetic holding release output from the control unit 6 because the ignition detection output from the ignition detection device 23 is lost. close up.

  The needle 300 changes the opening degree of the flow rate adjustment valve 34 by sliding back and forth in conjunction with the operation of moving the heating power adjustment lever 14b to the left and right. Further, when the fire extinguishing button 13b is pushed to the deepest position for ignition, the heating power adjusting lever 14b is held at a predetermined position by engagement with the cam portion 310 of the slider 31, and the flow rate adjusting valve 34 is suitable for ignition. Opening degree.

  The on-off valves 35 and 36 that are opened and closed electromagnetically are opened and closed when the control unit 6 performs the combustion control according to the cooking contents described above, thereby adjusting the heating power. The maximum thermal power is obtained when both are open, the minimum thermal power is obtained when both the on-off valves 35, 36 are closed, and the intermediate thermal power is obtained when only one of the on-off valves 35, 36 is opened. When performing such combustion control, the heating power adjustment lever 14b is kept in the predetermined position. Further, extinguishing is performed by releasing the electromagnetic holding of the safety valve 32 and closing the safety valve 32.

  As the valve unit 3 for the stove burner 2a, the valve unit 3 shown in FIG. 3 in which the on-off valve 36 and the orifice 38 are closed is used. The valve unit 3 for the stove burner 2c is shown in FIG. In the unit 3, the opening / closing valve 36 and the orifice 38 are closed, the orifice 37 is closed, and the opening / closing valve 35 is normally opened. By setting it as such a structure, the stove burner 2b is a high output (high thermal power) type, the stove burner 2a is a standard output type, and the stove burner 2c is a low output type. The valve unit for the grill burner has a different configuration, but the safety valve 32 and the main valve 33 have the same configuration as that shown in FIG.

  The control unit 6 is constituted by a microcomputer, and performs open / close control of the open / close valves 35 and 36 that are electromagnetic valves, and hold of the safety valve 32 and control of transition to the closed state. Further, at the time of ignition, the above-mentioned igniter which is an ignition operation unit is operated to cause the spark plug 22 to discharge. When the ignition detection device 23 detects ignition, the safety valve 32 is held open as described above. When the flame is no longer detected, the control unit 6 stops maintaining the safety valve 32 in an open state, and the safety valve 32 is stopped. Return to the closed state. Therefore, the fuel gas does not flow out even if it disappears due to boiling or wind.

  Further, when the temperature of the lower surface of the cooking container detected by the temperature sensor 24 reaches a predetermined temperature (for example, 250 ° C.), the control unit 6 determines that an abnormality such as airing or scorching has occurred, and the safety valve 32. Close.

  Next, the operation of the control unit 6 at the time of ignition in the gas heating cooker 1 will be described in the case of the stove burner 2b. When the point fire extinguishing button 13b is pushed, the main valve 33 is opened as described above and FIG. As shown, the instrument plug switch 7 is turned on. When the appliance plug switch 7 is turned on, power is supplied to the control unit 6 comprising a microcomputer, and the control unit 6 enters the normal processing state after executing the initial processing.

  The slider 31 turns on the ignition switch 8 when the valve rod 39 retracts the safety valve 32 and starts to open the safety valve 32 by pushing the point fire button 13b. The controller 6 that detects the ignition operation by turning on the igniter operates the igniter. Here, the igniter is operated to perform ignition when a predetermined time T1 has elapsed since the ignition switch 8 was turned on.

  However, when the initial process of the control unit 6 is not completed when the ignition switch 8 is turned on and the ignition switch 8 is already turned on when the initial process is completed, the control unit 6 completes the initial process. Ignition is performed when a predetermined time T2 elapses from the hour. The predetermined time T2 may be shorter than the predetermined time T1, but if the predetermined time T1 from when the ignition switch 8 is turned on until ignition is performed is, for example, about 0.5 seconds, the predetermined time T2 T2 is preferably about 0.4 seconds, for example. Incidentally, the time required for the initial process of the control unit 6 is about 0.25 seconds.

  The time T3 for the controller 6 to operate the igniter is until the pushing operation of the fire extinguisher button 13b is released or until the ignition detecting device 23 detects the ignition, but the state where the fire extinguishing button 13b is pushed is shown. Even if it is maintained, it is limited to a maximum of about 5 seconds (in the case of a grill burner, a maximum of about 7 seconds).

  If ignition to the burner 20 is detected by the ignition detection device 23 by the ignition operation, the control unit 6 holds the safety valve 32 in the open state as described above, and abnormalities such as fire extinguishing and emptying are detected. If so, the safety valve 32 is closed.

  Even when the ignition switch 8 is turned on, the operation of the igniter is delayed after the safety switch 32 is not fully opened when the ignition switch 8 is turned on or when the gas starts to flow. This is because it is difficult to ignite because the flow is not stable. Since the first predetermined time T1 is a delay time for waiting for the safety valve 32 to be in the open state, the first predetermined time T1 is at least equal to or longer than the time from when the operation of the ignition switch 8 is detected until the safety valve 32 is in the open state. Is desirable.

  Since ignition is performed when the safety valve 32 is fully opened and the gas flow is stabilized, ignition can be performed reliably. Further, even if the user stops the pushing operation of the fire extinguishing button 13b after hearing the discharge sound in the spark plug 22, the pushing operation of the fire extinguishing button 13b has reached the deepest position at that time, and the gas flow is stable. Therefore, since the operation of maintaining the electromagnetic open state of the safety valve 32 by the detection of ignition is also performed reliably, reliable ignition can be performed also in these respects.

  Although the description has been given using the case of the stove burner 2b, the ignition after the delay of the predetermined time T1 is the same as that in the above-mentioned example for the other burner burners 2a and 2c and the grill burner.

  In the above embodiment, the ignition operation unit is configured with a point fire button that can perform ignition and fire extinguishing with the same button, but a fire extinguishing button is separately provided for the ignition button. Of course, the present invention can also be applied to an apparatus that performs ignition and valve opening / closing by rotating the dial type operation unit.

DESCRIPTION OF SYMBOLS 1 Gas heating cooker 2a-2c Stove burner 3 Valve unit 6 Control part 7 Appliance plug switch 8 Ignition switch 13a-13d Fire extinguishing button 14a-14d Thermal control lever 22 Spark plug 23 Ignition detection device 24 Temperature sensor 32 Safety valve 33 Main Valve 39 Valve rod

Claims (3)

  A safety valve that starts to open in accordance with the operation of the ignition operation unit and is maintained open by energization in the valve opening completion state, an ignition switch that detects the operation of the ignition operation unit, A control unit that performs an ignition operation on the gas supplied through the safety valve, and the safety valve is a gas heating cooker that is in the valve opening completion state after detecting the operation of the ignition switch, and the control unit includes the ignition A gas heating cooker characterized in that an ignition operation is performed after a first predetermined time has elapsed since operation detection by a switch.   2. The gas cooking device according to claim 1, wherein the first predetermined time is longer than a time from when the operation of the ignition switch is detected until the safety valve is in the valve opening completion state.   In the case where the control unit performs the initial process by starting the power supply with the start of the operation of the ignition operation unit, a second predetermined time shorter than the first predetermined time from the operation detection by the ignition switch. The gas heating cooker according to claim 1 or 2, wherein an ignition operation is performed during the elapse of time.

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