JP2019184177A - Heating cooker - Google Patents

Abstract

To provide a heating cooker comprising a burner for heating an item to be cooked, in which a manual operated fire power adjustment device for igniting a burner and adjusting a fire power and an automatic control type fire power adjustment device for automatically adjusting fire power at the time of automatic cooking are arranged in series in a gas supply path to the burner, and an automatic cooking cannot be carried out under a state in which a burner fire power is restricted by the manual operated fire power adjustment device so as to enable a poor cooking under an automatic cooking to be prevented in advance.SOLUTION: There is provided detection means for detecting a state in which an operating position of a manual operated fire power adjustment device 5 is present within a predetermined range where the fire power of a burner 1 is more than a predetermined fire power. An automatic cooking can be executed only when an operating position of the manual operated fire power adjustment device 5 is present in a predetermined range detected by the detection means after burner ignition.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooking device including a burner for heating an object to be cooked.

  Conventionally, as this type of heating cooker, a manually operated thermal power adjustment device that performs ignition and thermal power adjustment of the burner in a gas supply path to the burner, and an automatically controlled thermal power adjustment device that performs automatic thermal power adjustment during automatic cooking Are connected in series (for example, see Patent Document 1).

  In such a heating cooker, automatic cooking may be performed in a state where the burner's thermal power is reduced by the manually operated thermal power control device. In this case, even if an attempt is made to increase the burning power of the burner with the automatic control-type thermal power control device, the heating power does not become strong and automatic cooking cannot be performed well, resulting in cooking failure.

JP 2017-20704 A

  In view of the above, the present invention provides a cooking device that prevents automatic cooking from being performed in a state where the burner's thermal power is reduced by a manually operated thermal power control device, and prevents defective cooking due to automatic cooking. The task is to do.

  In order to solve the above-mentioned problems, the present invention is a heating cooker provided with a burner for heating an object to be cooked, and is a manually operated thermal power control device that performs ignition and thermal power control of a burner in a gas supply path to the burner. And an automatically controlled thermal power control device that automatically adjusts the thermal power during automatic cooking, the operation position of the manually operated thermal power control device is a predetermined value that makes the burner thermal power equal to or higher than the predetermined thermal power It is provided with a detecting means for detecting when it is in the range, and automatic cooking can be executed only when the operation position of the manually operated thermal power control apparatus is within a predetermined range detected by the detecting means after burner ignition. Features.

  According to the present invention, when the burner's thermal power is reduced to a thermal power that is weaker than a predetermined thermal power in the manually operated thermal power control device, automatic cooking becomes impossible to execute, and inadequate cooking due to automatic cooking in this state is prevented in advance. can do.

  Further, in the present invention, when an automatic cooking switch for performing automatic cooking is turned on, a notification means is provided that operates if the operation position of the manually operated thermal power control device is not within a predetermined range detected by the detection means. It is desirable. According to this, the operation of the notification means can prompt the user to operate the manually operated thermal power adjusting device so that the thermal power of the burner becomes equal to or higher than the predetermined thermal power.

The perspective view of the stove burner provided in the heating cooker of embodiment of this invention. FIG. 2 is a cut side view of the stove burner cut along line II-II in FIG. 1. The perspective view of the manual operation type thermal power adjustment apparatus provided in the heating cooker of embodiment. The perspective view of the decomposition | disassembly state of the manual operation type thermal power adjustment apparatus of FIG. The cut | disconnected side view cut | disconnected by the electromagnetic safety valve arrangement | positioning part of the manual operation type thermal power control apparatus of FIG. The cutting top view cut | disconnected by the VI-VI line of FIG. FIG. 7 is a cut side view taken along line VII-VII in FIG. 6. (A) (b) (c) The cut-out top view of the principal part in the extinguishing position, ignition position, and minimum thermal power position of a closing element. The graph which shows the relationship between the rotation angle of a closing element, and the amount of gas supplied to a parent burner and a child burner. The flowchart which shows the control content which the controller of the heating cooker of embodiment performs.

  With reference to FIG. 1, FIG. 2, 1 is the stove burner provided in the stove which is the heating cooker of embodiment of this invention. The stove burner 1 includes a parent burner 2 and a child burner 3 adjacent to the lower side of the parent burner 2. More specifically, the stove burner 1 includes a burner body 11 having a triple cylinder inside and outside an outer cylinder 111, an intermediate cylinder 112, and an inner cylinder 113, and an intermediate cylinder 112. A burner head 12 having an inner annular hanging wall 121 fitted to the outer circumferential portion, an upper annular wall 122 on the upper surface of the outer peripheral portion, and a lower annular wall 123 on the lower surface of the outer peripheral portion seated on the upper end portion of the outer cylindrical body 111; A burner cap 13 that has an inner annular hanging wall 131 that fits into the cylindrical body 113 and that sits on the upper end of the upper annular wall 122 on the lower surface of the outer circumferential portion is provided. The intermediate cylinder 112, the inner cylinder 113, the burner head 12, and the burner cap 13 constitute the parent burner 2, and the outer cylinder 111, the intermediate cylinder 112, and the burner head 12 constitute the child burner 3.

  In addition, a mixing pipe (parent burner mixing pipe) 21 communicating with the space between the intermediate cylinder 112 and the inner cylinder 113 serving as the inner space of the parent burner 2 is provided, and an outer cylinder serving as the inner space of the child burner 3. A mixing pipe (child burner mixing pipe) 31 communicating with the space between the body 111 and the intermediate cylinder 112 is provided. Further, a flame hole (parent burner flame hole) 22 for the parent burner 2 through which an air-fuel mixture (mixed gas of fuel gas and primary air) from the parent burner mixing pipe 21 is ejected is formed on the upper annular wall 122 of the burner head 12. A plurality of holes are formed at intervals in the circumferential direction, and further, a flame hole (child burner flame hole) 32 for the child burner 3 in which the air-fuel mixture from the child burner mixing pipe 31 is ejected to the lower annular wall 123 of the burner head 12. Are formed at intervals in the circumferential direction. The total opening area of the child burner flame holes 32 is smaller than the total opening area of the parent burner flame holes 22, and the maximum heating power of the child burner 3 is smaller than that of the parent burner 2. Further, a target portion 124 is provided at one location around the outer peripheral surface of the burner head 12 so as to face the ignition electrode (not shown). The stove burner 1 is further provided with a pan bottom temperature sensor 14 that comes into contact with the bottom surface of an object to be cooked (such as a pan) and detects its temperature.

  A gas supply path 4 for supplying fuel gas to the stove burner 1 is provided with a manually operated fire power adjusting device 5 for igniting the stove burner 1 and adjusting the heat power, and an automatically controlled fire power adjusting for automatically adjusting the heat power during automatic cooking. The apparatus 6 is interposed in series. The stove is provided with various automatic cooking switches such as a water heater switch, a boiled noodle switch, and a rice cooking switch as switches for automatic cooking. When these automatic cooking switches are turned on, the controller 7 provided on the stove automatically The control-type thermal power adjusting device 6 is controlled to automatically adjust the thermal power of the stove burner 1 so that the temperature detected by the pan bottom temperature sensor 14 changes in a predetermined pattern corresponding to various automatic cooking. When the automatic cooking switch is not turned on, the automatic control type thermal power adjusting device 6 is maintained in a fully opened state. As the automatic control type thermal power control device, for example, a known electric flow rate control valve having a valve body driven by a motor or an electromagnetic on / off valve that is switched on and off by an electromagnetic solenoid can be used. Is omitted.

  Hereinafter, the manually operated thermal power control apparatus 5 will be described with reference to FIGS. 3 to 7. The manually operated thermal power control device 5 includes an electromagnetic safety valve 52 provided in a casing 51 having a gas inlet 511, a gas outlet 512 for a parent burner, and a gas outlet 513 for a child burner, It has. The electromagnetic safety valve 52 and the closing member 53 are operated by an operation shaft 54 to which an operation knob exposed on a stove top plate (not shown) is attached to an upper end portion. The operation shaft 54 is inserted and supported by a support frame 514 attached to the upper surface of the casing 51.

  The electromagnetic safety valve 52 includes a valve body 522 that faces the valve seat 521a at one end of the valve chamber 521 in the casing 51 that communicates with the gas inlet 511, and a valve that biases the valve body 522 in the closing direction approaching the valve seat 521a. The spring 523, the suction piece 524 connected to the valve body 522 via the valve shaft 522a extending in the opening direction away from the valve seat 521a, the electromagnet 525 facing the suction piece 524, and the valve body 522 can be pressed in the opening direction. And a lever 527 pivotally supported by a bracket 515 fixed to the casing 51 so as to be opposed to the outer end of the push rod 526. A push plate 541 is attached to the operation shaft 54 to abut against the lever 527 and swing it in the push-in direction of the push rod 526 when it is pushed down. In addition, an ignition switch 55 including a micro switch that detects the downward movement of the push plate 541 is attached to the casing 51. Then, when the operation shaft 54 is pushed down, the ignition switch 55 is turned on to start an ignition operation, that is, spark discharge at the ignition electrode, and the valve body 522 through the push plate 541, the lever 527, and the push rod 526. The valve body 522 is attracted and held at the valve-opening position even when the operation shaft 54 is released, by pushing the magnet 525 to the valve-opening position where the suction piece 524 contacts the electromagnet 525 and energizing the electromagnet 525 in this state. I try to do it. However, if the electromotive voltage of a thermocouple (not shown) attached to the parent / child burner 1 does not rise to a predetermined level even after a predetermined waiting time has elapsed from the start of the ignition operation, the energization to the electromagnet 525 is stopped. The valve body 522 is returned to the closed position where the valve spring 523 is seated on the valve seat 521a by the biasing force of the valve spring 523, that is, the electromagnetic safety valve 52 is closed. Even when it drops below, the energization to the electromagnet 525 is stopped and the electromagnetic safety valve 52 is closed.

  The closing member 53 is rotatably housed in a closing member storage portion 531 formed in the casing 51. A pin 542 protruding in the radial direction is fixed to the operation shaft 54. A connector 543 having an engaging groove 543a with which the pin 542 engages in a vertically movable manner and an engaging portion 543b with which the upper end of the closing member 53 is engaged is provided. By rotation, the closing member 53 is rotated via the pin 542 and the connector 543. In addition, a spring 544 that biases the operation shaft 54 upward via the pin 542 is provided, and a guide plate 545 that guides the operation of the operation shaft 54 in cooperation with the pin 542 is provided below the bracket 515. . The guide plate 545 engages with an engaging groove 545a in which the pin 542 engages from below when the closing member 53 is in a fire extinguishing position described later, and the pin 542 engages in a state where the closing member 53 is in an ignition position described later. And click grooves 545b for obtaining a click feeling. In a state where the closing member 53 is in the fire extinguishing position, the operation shaft 54 cannot be rotated unless the operation shaft 54 is pushed down to disengage the pin 542 below the engagement groove 545a.

Further, the upper portion of the閉子housing portion 531 of the casing 51, the pin 542 and the first stopper portion 546 ₁ that abuts in a state in which閉子53 resides in extinguishing position, pin when the閉子53 resides in the ignition position 542 and height slightly lower second stopper portion 546 ₂ abuts the pin 542 in a state existing in minimum thermal position閉子53 will be described later, is a third stopper 546 ₃ which abuts is provided. When the operating member 54 is pushed down from the state where the closing member 53 is in the fire extinguishing position and is rotated 80 ° in the circumferential direction (counterclockwise as viewed from above), the closing member 53 reaches the ignition position, and the pin 542 second contacts the stopper 546 _2. Next, the operation shaft 54 is rotated in one circumferential direction in a state releasing the depressed thereof, the pin 542 rides over the ₂ second stopper 546, the閉子53 minimum thermal power position by rotating 70 ° from the ignition position reached, the pin 542 abuts against the third stopper 546 _3.

  An inflow side passage hole 532 communicating with the downstream side of the electromagnetic safety valve 52 and an outflow side passage hole 533 communicating with the parent burner gas outlet 512 are opened on the peripheral wall surface of the closing housing portion 531. The lower space of the closing housing portion 531 communicates with the child burner gas outlet 513. The closing member 53 is formed with a shaft hole 534 communicating with the lower space of the closing member storing portion 531 and first to third recessed grooves 535, 536, and 537 that are recessed from the outer peripheral surface. The concave grooves 535, 536, and 537 communicate with the shaft hole 534 through the radial holes 535a, 536a, and 537a. The hole 537a communicating with the third concave groove 537 is formed with a small diameter.

  When the closing member 53 is in the fire extinguishing position, as shown in FIG. 8A, any of the first to third concave grooves 535, 536, and 537 does not overlap the inflow side passage hole 532, and is used for the parent burner. No gas flows through any of the gas outlets 512 and 513 for the child burner. When the closing member 53 is in the ignition position, as shown in FIG. 8B, the first concave groove 535 overlaps the outflow side passage hole 533 in the fully opened state, and the second concave groove 536 overlaps with the inflow side passage hole 532. It overlaps in the fully opened state, and the heating power of the parent burner 2 and the child burner 3, that is, the supply gas amount becomes a predetermined maximum amount (the parent burner 2 is Qpmax and the child burner 3 is Qcmax). When the closing member 53 is at the minimum thermal power position, as shown in FIG. 8C, the first and second concave grooves 535, 536 overlap the passage holes 532, 533 on both the inflow side and the outflow side. Instead, only the third groove 537 overlaps with the inflow side passage hole 532, the gas supply to the parent burner 2 is stopped, and the amount of gas supplied to the child burner 3 becomes the predetermined minimum amount Qcmin.

  FIG. 9 shows the relationship between the rotation angle of the closing member 53 and the amount of gas supplied to the parent burner 2 and the child burner 3. As the degree of overlap of the first concave groove 535 with the outflow side passage hole 533 is increased by the rotation of the closing member 53 in the circumferential direction from the fire extinguishing position, the amount of gas supplied to the parent burner 2 is directed toward the maximum amount Qpmax. As the degree of overlap of the first concave groove 535 with the outflow side passage hole 533 decreases due to rotation of the closing member 53 in one circumferential direction from the ignition position, the amount of gas supplied to the parent burner 2 decreases. Gradually decreases from the maximum amount Qpmax, and the gas supply to the parent burner 2 is stopped when the rotation angle from the fire extinguishing position becomes slightly less than 120 °.

  By the way, automatic cooking may be performed in a state where the thermal power of the burner 1 is reduced by the manually operated thermal power control device 5. In this case, even if an attempt is made to increase the heating power of the stove burner 1 with the automatic control-type thermal power control device 6, the heating power does not become strong and automatic cooking cannot be performed well, resulting in cooking failure.

  Therefore, in the present embodiment, when the operation position of the manually operated thermal power control device 5 is within a predetermined range in which the thermal power of the cono burner 1 is equal to or greater than the predetermined thermal power, a detection unit that detects this is provided. Automatic cooking can be executed only when the operation position of the manually operated thermal power control device 5 is within a predetermined range detected by the detection means. Hereinafter, this point will be described in detail.

  A microswitch 56 that cooperates with a cam 561 connected to the operation shaft 54 between the support frame 514 and the pressing plate 541 is attached to the upper surface of the casing 51, and the microswitch 56 constitutes detection means. The micro switch 56 has an operating position of the manually operated thermal power control device 5, that is, a rotational position of the closing member 53, and θa in FIG. 9 slightly before the ignition position and the supply gas amount to the parent burner 2 from the maximum amount Qpmax. When it is in the range between θb in FIG. 9 where the predetermined amount Qpmid is not so reduced, it is pushed by the protrusion 561a on the outer periphery of the cam 561 and turned on.

  As shown in FIG. 10, the controller 7 confirms that the burner 1 has been ignited by the manually operated thermal power control device 5 (STEP 1), and then determines whether or not the automatic cooking switch is turned on (STEP 2). ). When the automatic cooking switch is turned on, first, it is determined whether or not the micro switch 56 is turned on (STEP 3). If it is turned on, automatic cooking is performed, and automatic control by the automatically controlled thermal power control device 6 is performed. The thermal power adjustment is performed (STEP 4). For example, when a water heater switch, which is an automatic cooking switch, is turned on, the maximum heating power is maintained until the temperature detected by the pan bottom temperature sensor 14 reaches the boiling temperature, and when the boiling temperature is exceeded, the heating power is reduced to a predetermined small heating power. After a lapse of time, the electromagnetic safety valve 52 is closed.

  On the other hand, when the micro switch 56 is not turned on, automatic cooking is not performed, and the notification means 8 such as a voice, a buzzer, and a liquid crystal display is operated (STEP 5), and then the process returns to STEP 3. According to this, when the heating power of the burner 1 is reduced to a heating power weaker than a predetermined heating power by the manual operation type thermal power control device 5, automatic cooking becomes impossible to execute, and the cooking failure due to the automatic cooking in this state is obviated. Can be prevented. In addition, the operation of the notification means 8 can prompt the user to operate the manually operated thermal power control device 5 so that the thermal power of the burner 1 is equal to or higher than a predetermined thermal power.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, although the heating cooker of the said embodiment is a stove provided with the stove burner 1 which consists of a parent-child burner, the cooking stove provided with the normal stove burner which is not a parent-child burner, Furthermore, heating cookers other than the stove provided with a burner are used. Similarly, the present invention can be applied. Further, the manually operated thermal power adjusting device 5 of the above embodiment operates the electromagnetic safety valve 52 and the closing element 53 with a common operating shaft 54, but is provided with a point fire extinguishing button and a thermal power adjusting lever. It is also possible to configure a manually operated thermal power adjustment device that presses and opens the electromagnetic safety valve by pushing the fire extinguishing button, and moves the closing or needle valve by swinging the thermal power adjustment lever to perform the thermal power adjustment. In this case, the operation position detection means of the manually operated thermal power control apparatus may be configured by a position detection switch such as a micro switch that is turned on when the thermal power control lever is swung to the medium fire position or higher.

DESCRIPTION OF SYMBOLS 1 ... Combustor (burner), 4 ... Gas supply path, 5 ... Manual operation type thermal power adjustment apparatus, 56 ... Micro switch (detection means), 6 ... Automatic control type thermal power adjustment apparatus.

Claims (2)

A cooking device having a burner for heating an object to be cooked, wherein a gas supply path to the burner performs a manual operation type thermal power adjustment device that performs ignition and thermal power adjustment of the burner, and automatic thermal power adjustment during automatic cooking In the case where the automatic control type thermal power control device is interposed in series,
When the operating position of the manually operated thermal power control device is within a predetermined range in which the thermal power of the burner is equal to or higher than the predetermined thermal power, a detection means for detecting this is provided. A heating cooker characterized in that automatic cooking can be executed only when it is within a predetermined range to be detected. The system further comprises an informing means that operates when an automatic cooking switch for performing automatic cooking is turned on and the operation position of the manually operated thermal power control device is not within a predetermined range detected by the detecting means. 1 is a heating cooker.

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