JP4446853B2 - Stove - Google Patents

Description

The present invention comprises a burner for heating an object to be heated located at a heating position;
A heated object detecting means for detecting whether or not a heated object is present at the heating position;
Command means switchable between an ignition command state for instructing an ignition command for the burner and a fire extinguishing command state for instructing a fire extinguishing command for the burner;
When the command means is switched from the fire extinguishing command state to the ignition command state, if the heated object detecting means detects the presence of the heated object, the burner is ignited, and the heated object The present invention relates to a stove provided with combustion control means for maintaining the burner in a fire extinguishing state when the object detection means detects the absence of an object to be heated.

  Such a stove ignites the burner when the command means is switched from the fire extinguishing command state to the ignition command state in a state where the heated object such as a pan is positioned at a heating position such as Gotoku, etc. Even if the command means is switched from the fire extinguishing command state to the ignition command state without placing the heater in the heating position, the burner is kept in the fire extinguishing state so that the object to be heated is not located in the heating position. Nevertheless, the safety is improved by preventing the inconvenience that the burner is ignited, which is disclosed in Patent Document 1, for example.

JP-A-8-303785

  By the way, when the user uses such a stove, the user forgets to position the object to be heated at the heating position, and the command means is switched from the fire extinguishing command state to the ignition command state. The command means is not positioned at the heating position, such as switching the command means from the fire extinguishing command state to the ignition command state before the heated object is positioned at the heating position. There is a case where an operation for switching from the fire extinguishing command state to the ignition command state is performed.

  However, with the conventional stove, when the command means is switched from the fire extinguishing command state to the ignition command state when the object to be heated is not located at the heating position, Of course, it is necessary to place the heated object at the heating position, but after the command means is switched from the ignition command state to the fire extinguishing command state, it is necessary to switch the command means from the fire extinguishing command state to the ignition command state again. Yes, it was time consuming and inconvenient.

  This invention is made | formed in view of this situation, The objective is to provide the stove which can improve usability, without impairing safety | security.

The stove of the present invention is a burner for heating an object to be heated located at a heating position;
A heated object detecting means for detecting whether or not a heated object is present at the heating position;
Command means switchable between an ignition command state for instructing an ignition command for the burner and a fire extinguishing command state for instructing a fire extinguishing command for the burner;
When the command means is switched from the fire extinguishing command state to the ignition command state, if the heated object detecting means detects the presence of the heated object, the burner is ignited, and the heated object A combustion control means for maintaining the burner in a fire extinguishing state when the object detection means detects the absence of an object to be heated; and
In the first characteristic configuration, the combustion control means detects the absence of the object to be heated when the command means is switched from the fire extinguishing command state to the ignition command state. Thus, when the burner is maintained in a fire extinguishing state, the heated object detection means is configured to ignite the burner when detecting the presence of the heated object ,
When the command means is switched from the fire extinguishing command state to the ignition command state, the heated object is detected at the heating position when the heated object detection means detects the absence of the heated object. There exists the point provided with the alerting | reporting means which alert | reports the guidance information which urges | positions to position with an audio | voice .

  That is, when the object to be heated is not positioned at the heating position, the operation of switching the command means from the fire extinguishing command state to the ignition command state is performed, and the burner is maintained in the fire extinguishing state. When placed in the heating position, the burner is ignited.

In other words, if the operation of switching the command means from the fire extinguishing command state to the ignition command state is performed without placing the object to be heated at the heating position, the burner is maintained in the fire extinguishing state, but in this state, The burner is ignited simply by positioning the heated object at the heating position, and after switching the command means from the ignition command state to the fire extinguishing command state as in the prior art, the command means is again switched from the fire extinguishing command state. There is no need to switch to the ignition command state, and usability is improved.
Even if the command means is switched from the fire extinguishing command state to the ignition command state when the object to be heated is not positioned at the heating position, the burner will not extinguish unless the object to be heated is positioned at the heating position. Since it is maintained in a state, safety is not impaired.
Therefore, it has become possible to provide a stove that can improve the usability while maintaining the safety.
Further, when the command means is switched from the fire extinguishing command state to the ignition command state in a state where the object to be heated is not positioned at the heating position, the notification means causes the object to be heated to be positioned at the heating position. Prompt guidance information is notified.
The user can recognize that the cause of the burner not being ignited by notifying the guide information by the notifying means is that the object to be heated is not positioned at the heating position. Since it is not known why the light is not ignited, the burner can be ignited by quickly positioning the object to be heated at the heating position without performing an unnecessary operation such as re-operating the command means.
Therefore, usability can be further improved.

In addition to the first feature configuration, the second feature configuration is
When the command means is switched from the fire extinguishing command state to the ignition command state, the combustion control means detects the absence of the object to be heated by the heated object detection means, When the command means is switched from the fire command state to the ignition command state when the command means is maintained in the fire extinguishing state, the heated object detection means is heated until the set time for standby is reached. When detecting the presence of the object to be heated by the object to be heated detection means even if the burner is ignited and the elapsed time reaches the set time for standby, The ignition means of the command means is configured to be invalidated.

  That is, when the object to be heated is not positioned at the heating position, the command means is switched from the fire extinguishing command state to the ignition command state, and the command means is extinguished when the burner is maintained in the fire extinguishing state. If the object to be heated is positioned at the heating position before the elapsed time after switching from the command state to the ignition command state reaches the standby setting time, the burner is ignited, and the elapsed time becomes the standby setting time. However, if the object to be heated is not positioned at the heating position, the ignition command of the command means becomes invalid, and after the elapsed time reaches the standby setting time, the object to be heated is positioned at the heating position. Also, the burner is maintained in the fire extinguisher state.

  In other words, when the command means is switched from the fire extinguishing command state to the ignition command state when the heated object is not positioned at the heating position, the burner is ignited when the heated object is positioned at the heating position. Since the time during which the state of being continued is limited, safety can be further improved.

In addition to the first or second feature configuration, the third feature configuration is
The combustion control means reduces the combustion amount of the burner to the non-existing combustion amount immediately when the heated object detection means detects the absence of the heated object during combustion of the burner. When the elapse time after the lowering process is executed and the heated object detecting means detects the absence of the heated object reaches the non-existence determining set time, the heated object detecting means is present. Is detected, the combustion maintaining process for maintaining the burner in a combustion state is executed, and the presence of the object to be heated is detected by the object to be heated detection means even when the elapsed time reaches the non-existence setting time. When the operation is continued, the fire extinguishing process in the absence of extinguishing the burner is executed.

That is, if the object to be heated is moved from the heating position during the burner combustion, the combustion amount lowering process in the absence is immediately performed to reduce the burner combustion amount to the combustion amount in the absence of the object to be heated. If the object to be heated is positioned again at the heating position after the set time for non-existence determination has elapsed after the heater is moved from the heating position, the combustion maintaining process is executed to maintain the burner combustion, and the heated Even if the non-existence determining set time elapses after the object is moved from the heating position, if the object to be heated is not positioned at the heating position, a fire extinguishing process is performed when there is no heating, and the burner is extinguished.
Incidentally, as the combustion maintenance process, for example, a combustion state in which the combustion amount is returned to the combustion amount before execution of the non-existing combustion amount reduction process is set as the combustion state, and combustion of the burner is maintained, or the absence There is a form in which the combustion of the burner is maintained by setting the combustion by the non-existing combustion amount reduced by the hourly combustion amount reduction process as the combustion state.

That is, when performing the cooking to heat the object to be heated by the burner while moving the object to be heated from the heating position or the heating position, when the object to be heated is moved from the heating position, Immediately after the burner combustion amount is reduced to the non-existing combustion amount, the heated object is again positioned at the heating position until the non-existence determination set time elapses after the heated object is moved from the heating position. For example, in a state where the combustion amount of the burner is returned to the combustion amount before moving the object to be heated, or in the state where the combustion amount in the absence is reduced by moving the object to be heated. Since burner combustion is maintained, usability can be improved while maintaining safety.
Moreover, even if the set time for non-existence determination has elapsed after the heated object is moved from the heating position during combustion of the burner, if the heated object is not positioned at the heating position, the burner is extinguished, It is possible to prevent burning of the burner from continuing for a long time in a state where the object to be heated is not located at the heating position, and safety can be improved.

  By the way, as cooking for heating an object to be heated with a burner while moving the object from a heating position or at a heating position, for example, a frying pan as the object to be heated is used as a heating position. Stir-fry cooking that is carried on or raised from the five virtues, or the pan that is being heated with the burner on the virtues is lowered from the five virtues, the heating state is confirmed, and then the heating that is put on the five virtues There is cooking.

  Accordingly, it is possible to improve the usability both when the burner is ignited and during combustion, while maintaining the safety.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the gas stove is constituted by a built-in type gas stove having a grill portion 3 having three stove burners 1 a, 1 b, 1 c and a grill burner 2, and the three stove burners 1a, 1b, and 1c are comprised by the standard burner 1a, the small burner 1b, and the high thermal power burner 1c.

Further, as shown in FIG. 1, a grill exhaust port 4 for exhausting combustion exhaust gas from the grill portion 3 is formed, and the top surface of the gas stove is covered with a glass top plate 5. In addition, five virtues 6 for receiving and supporting an object to be heated (such as a pan) with respect to the standard burner 1a, the small burner 1b, and the high thermal power burner 1c are placed and supported. In other words, Gotoku 6 corresponds to the heating position where the object to be heated is positioned.
Further, on the back surface side of the top plate 5, the top surface display unit 70 that displays the fire power of each of the standard burner 1 a, the small burner 1 b, and the high heat burner 1 c and the point fire extinguishing state of the grill burner 2 is visible through the top plate 5. It is provided as such.

  As shown in FIGS. 1 and 2, on the front side of the gas stove, the manual burner 1a, the small burner 1b, the high-heat burner 1c, and the grill burner 2 are instructed to command ignition and extinguishing, heating power adjustment, and various settings. A combustion control unit H (an example of combustion control means) provided with an operation unit S and configured to execute various controls with a microcomputer is based on the operating state commanded by the manual operation unit S. Thus, the standard burner 1a, the small burner 1b, the high thermal power burner 1c and the grill burner 2 are controlled. An automatic return type push operation type power switch 40 is also provided on the front side of the gas stove.

  As shown in FIG. 2, each of the standard burner 1a, the small burner 1b, and the high thermal power burner 1c is provided with a spark plug 7 and a thermocouple 8 for detecting an ignition state. It is composed of a double-sided burner provided with a pair of lower surface burners 2b and 2c, and each of the upper surface burner 2a and the pair of left and right lower surface burners 2b and 2c has a spark plug 7 and a thermocouple 8 for detecting an ignition state. Is provided.

Further, the standard burner 1a, the small burner 1b and the high thermal power burner 1c are each expanded and contracted as shown in FIGS. 2 and 3 (however, only the standard burner 1a is shown in FIG. 3). The mechanism 9 is provided to be extendable in the vertical direction with the lower end side fixed.
As shown in FIG. 3, the expansion / contraction mechanism 9 is movable up and down in a state in which a vertically movable portion 9b is urged upward by a spring (not shown) to a guide support portion 9a fixed to the casing. It is configured to support.

  When the object to be heated is not placed on the virtues 6, the upper end of the vertically movable portion 9b is in an extended state protruding from the upper end portion that receives the object to be heated in the virtues 6, and the object to be heated is placed on the virtues 6. Is placed, the vertically movable portion 9b is pushed down by the bottom portion of the object to be heated and is in a contracted state.

And with respect to the expansion and contraction mechanism 9 corresponding to each of the standard burner 1a and the high thermal power burner 1c, it is turned on when the vertically movable portion 9b of the expansion and contraction mechanism 9 is pushed down by the heated object placed on the virtues 6, A heated object detection switch 10 is provided so that the heated object placed on the virtues 6 is lifted and turned off when the vertically movable portion 9b returns upward.
That is, in the state where the object to be heated detection switch 10 is on, the existence of the object to be heated exists on the virtues 6, that is, the presence of the object to be heated is detected and the object to be heated detection switch 10 is turned off. 6, the absence of the object to be heated, that is, the absence of the object to be heated is detected, and the object to be heated detection means is constituted by the object to be heated detection switch 10.

  Furthermore, a temperature sensor 11 is provided in the upper end portion of the vertically movable portion 9b of the expansion / contraction mechanism 9 corresponding to each of the standard burner 1a, the small burner 1b, and the high heating power burner 1c, and is to be heated placed on the virtues 6 The temperature sensor 11 is configured to detect the temperature of the object to be heated while the bottom of the object is in contact with the upper end of the vertically movable portion 9b. Although not shown, the grill unit 3 is provided with a temperature sensor that detects the temperature in the grill.

  The gas supply configuration to the standard burner 1a, the small burner 1b, the high thermal power burner 1c, and the grill burner 2 will be described. As shown in FIG. 2, an original gas electromagnetic valve 13 is provided in the original gas supply path 12, The main gas supply path 12 is branched into four systems: a standard burner branch path 14a, a small burner branch path 14b, a high-heat-power burner branch path 14c, and a grill burner branch path 14d, and the grill burner branch to the grill burner 2 is branched. The path 14d further branches into a branch path for the upper surface burner and a branch path for the lower surface burner, and each of the branch paths has a flow path 15 with an orifice of and a bypass path 17 provided with an open / close solenoid valve 16. Is provided. The amount of gas is supplied to each of the standard burner branch path 14a, the small burner branch path 14b, the high thermal power burner branch path 14c, and the grill burner branch path 14d by driving a stepping motor 19 (see FIG. 4). A flow rate control valve 18 is provided for adjusting the amount of combustion (thermal power) of each burner.

  As shown in FIG. 4, the flow control valve 18 includes a stepping motor 19 as a drive source, a screw feed type moving operation mechanism 20 for changing the rotation operation of the stepping motor 19 to a slide movement operation, and a gas passage And a flow rate adjusting plate 24 in which a plurality of gas passage adjusting holes 23 are formed. The slide closing member 22 and the flow rate adjusting plate 24 constitute a flow rate adjusting unit 25 capable of changing the gas amount. That is, as shown in FIG. 4, the slide closing member 22 and the flow rate adjusting plate 24 are relatively slidably provided in a state in which the gas flow passage is shielded by the spring 26 and drives the stepping motor 19. As shown in FIG. 5, the total area where the insertion hole 21 formed in the slide closure 22 overlaps the adjustment hole 23 of the flow rate adjustment plate 24 is changed while the slide closure 22 is slid. The gas supply amount can be changed and adjusted. The slide movement amount of the slide closing member 22 is detected by a slide movement detection sensor 27.

  Next, the configuration of the manual operation unit S will be described. As shown in FIGS. 1, 6 and 7, on the front side of the gas stove, as the manual operation unit S, the burners 1a, 1b, 1c corresponding to the standard burner 1a, the small burner 1b and the high thermal power burner 1c, respectively. An artificially operated point-extinguishing command unit 28, burners 1a, 1b, 1c as command means that can be switched between an ignition command state for commanding a specific ignition command and a fire-extinguishing command state for commanding a fire extinguishing command for burners 1a, 1b, 1c Is provided with an artificially operated combustion amount adjusting operation section 29 for instructing adjustment of the amount of combustion (thermal power), and a setting input panel 50 for instructing setting of cooking. A setting input panel 60 for instructing thermal power adjustment is provided. Since these three point extinguishing command units 28 and three combustion amount adjustment operation units 29 have the same configuration, the configuration will be described below with the heating state adjustment unit 28 for the standard burner 1a as a representative, and the others will be described. Description is omitted. The setting input panel 50 and the setting input panel 60 are openable.

  As shown in FIGS. 6 and 7, a push-operation type point fire extinguishing switch 32 for instructing an ignition command and a fire extinguishing command is provided in the front panel 38 of the gas stove, and the back side is inserted through an insertion hole 39 formed in the front panel 38. A cylindrical rotation operation unit 31 is provided in a state of being inserted through. The rotation operation unit 31 is moved in the direction of the rotation axis so that the point-extinguishing switch 32 is pushed into a fire extinguishing command state for operating the fire extinguishing command state for commanding a fire extinguishing command, and protrudes from the pushing position. The point-extinguishing switch 32 is configured to be switched to an ignition command projecting position for operating the ignition command to command an ignition command, and is configured to be rotatable to adjust the combustion amount at the projecting position. ing.

In other words, the rotation operation unit 31 moves in the direction of the axis of rotation every time it is pushed, and is pushed forward by a position holding mechanism (not shown) so as to be substantially flush with the front panel 38. It is configured to be switchable to a position, and when the rotation operation unit 31 is switched to the protruding position, it is configured to be rotatable around its axis in each of the forward rotation direction and the reverse rotation direction. Yes. When the rotation operation unit 31 is switched to the pushing position, the point fire extinguishing switch 32 is turned off accordingly, and when the rotation operation unit 31 is switched to the protruding position, the point fire extinguishing switch 32 is turned on ( It is configured to be switched in conjunction with each other so as to be in the ON state. As shown in FIG. 2, the switching signal of the point extinguishing switch 32 is input to the combustion control unit H, and the combustion controlling unit H performs the ignition operation for the standard burner 1a when the point extinguishing switch 32 is switched to the ON state. When it is started and switched to the OFF state, the combustion operation of the standard burner 1a is stopped.
That is, the point extinguishing command unit 28 is configured by the rotation operation unit 31 and the point extinguishing switch 32.

  In addition, a rotary encoder 33 is provided inside the front panel 38 as pulse generating means for outputting a pulse signal in accordance with the rotation operation of the rotation operation unit 31. That is, the rotary operation unit 31 is connected to the operation shaft 34 of the rotary encoder 33 so as to be integrally rotatable and permitting relative movement in the axial direction. In the rotary encoder 33, one of the two pulse signals has a phase advanced from the other pulse signal in accordance with the rotation operation in one direction of the rotation operation unit 31, and the rotation operation unit 31 moves in the other direction. In a state where the phase of the other pulse signal is advanced from that of the one pulse signal in accordance with the rotation operation, two pulse signals having different phases are output in accordance with the rotation operation of the rotation operation unit 31. . In other words, the rotary encoder 33 includes two output terminals, and the pulse signals having different phases as described above are output from the two output terminals. Since such a rotary encoder 33 is well known, a detailed description of the configuration is omitted.

  As shown in FIG. 8, on the outer surface side of the front panel 38, a front thermal power display unit 36 that displays thermal power in a state where a plurality of LED lamps 35 that display thermal power are arranged is provided around each rotation operation unit 31. ing. This front thermal power display unit 36 uses a plurality of LED lamps 35 as level meters, and the number of LED lamps 35 corresponding to the amount of combustion corresponding to the magnitude of the combustion amount (thermal power) set by the rotary operation unit 31. It is the structure which lights up and displays. In this embodiment, since the size of the thermal power is from the minimum thermal power to the maximum thermal power, the standard burner 1a and the high thermal power burner 1c can be changed and adjusted in five levels, and the small burner 1c can be changed and adjusted in three levels. The front thermal power display unit 36 corresponding to each of the standard burner 1a and the high thermal power burner 1c is composed of five LED lamps 35, and the front thermal power display unit 36 corresponding to the small burner 1c is composed of three LED lamps 35. It is composed of.

  That is, each of the standard burner 1a and the high thermal power burner 1c is configured so that its combustion amount can be adjusted to five stages of set combustion amounts, and the small burner 1c has its combustion amount set to three stages of set combustion amounts. It is configured to be adjustable.

As shown in FIGS. 1 and 9, the top surface display unit 70 corresponds to the three top surface heat power display units 71 corresponding to the standard burner 1 a, the small burner 1 b, and the high heat power burner 1 c, and the grill burner 2. It is comprised from the grill combustion display part 73. FIG.
The top thermal power display unit 71 has the same configuration as the front thermal power display unit 36, and burns the amount of combustion (thermal power) set by the rotary operation unit 31 using a plurality of LED lamps 72 as level meters. The number of LED lamps 72 corresponding to the amount is turned on and displayed. The grill combustion display section 73 is composed of a single LED lamp 74. When the grill burner 2 is ignited, the combustion state is displayed by turning on the LED lamp 74.

  Then, as shown in FIG. 2, the combustion control unit H performs the standard burner 1a, the small burner based on the pulse signals generated by the rotary encoders 33 corresponding to the standard burner 1a, the small burner 1b, and the high thermal power burner 1c. The operation of the flow rate control valve 18 for each of the standard burner 1a, the small burner 1b and the high thermal power burner 1c is controlled so as to adjust the fuel supply amount to the 1b and high thermal power burner 1c. That is, the combustion control unit H determines the rotation operation direction and the rotation operation amount of the rotation operation unit 31 based on the pulse signal output from the rotary encoder 33, and determines the determined rotation operation direction and rotation operation amount. Correspondingly, the combustion amount of the standard burner 1a and the like is adjusted. At that time, the data of two pulse signals output from the rotary encoder 33 are repeatedly read every predetermined set unit time, and read. Based on the data pattern in the data of the two pulse signals, the rotation operation direction and the rotation operation amount of the rotation operation unit 31 are determined.

  That is, the rotation operation unit 31 and the rotary encoder 33 constitute the combustion amount adjustment operation unit 29.

In addition, as shown in FIG. 2, the combustion control unit H is configured so that the standard burner 1a, the small burner 1a, the small burner 1b, and the high burner 1c are based on pulse signals generated by the rotary encoders 33. 1b and the high thermal power burner 1c are displayed on the front thermal power display unit 36 and the top thermal power display unit 71 corresponding to the standard burner 1a, the small burner 1b, and the high thermal power burner 1c, respectively.
That is, the combustion control unit H is configured to control the front thermal power display unit 36 and the top thermal power display unit 71 in the same manner. For example, a pulse signal generated by the rotary encoder 33 corresponding to the standard burner 1a is the thermal power 3 , Three LED lamps 35 constituting the front thermal power display unit 36 are lit, and three LED lamps 72 constituting the top surface display unit 71 are lit.

  As shown in FIG. 2, the gas stove is provided with a speaker 37 as a notification means for notifying various information by voice, and the combustion control unit H is configured to notify the various information by the speaker 37. It is configured.

Next, the control operation of the combustion control unit H will be described based on the flowcharts shown in FIGS.
Since the control according to the present invention is executed for the standard burner 1a and the high thermal power burner 1c, the description of the control operation of the combustion control unit H for the small burner 1b and the grill burner 2 is omitted. To do.
Further, since the control operation of the combustion control unit H for the standard burner 1a and the high thermal power burner 1c is the same, the control operation for the standard burner 1a will be described below, and the high thermal power burner 1c will be described. Description of the targeted control operation is omitted.
The original gas solenoid valve 13 is opened when the point fire switch 32 corresponding to at least one of the standard burner 1a, the small burner 1b, the high thermal power burner 1c and the grill burner 2 is in the ON state. When all of the point fire extinguishing switches 32 corresponding to the 1a, the small burner 1b, the high thermal power burner 1c, and the grill burner 2 are in the OFF state, the valve is maintained in the closed state. A description of the control is omitted.

The main control operation will be described based on FIG.
When the point-extinguishing switch 32 is switched from the OFF state to the ON state and the heated object detection switch 10 is in the ON state, the combustion control unit H opens the flow rate control valve 18 and drives the spark plug 7. An ignition process is performed by igniting the standard burner 1a by giving a signal, and the opening degree of the flow control valve 18 is adjusted so that the heating power at a stage corresponding to the pulse signal output from the rotary encoder 33 is obtained. Thus, the combustion amount adjustment processing is performed (steps # 1 to # 4), and when the object to be heated detection switch 10 is in the OFF state when the point fire extinguishing switch 32 is switched from the OFF state to the ON state, the fire is being extinguished. Control when there is no object to be heated is executed (steps # 1, 2, 20).

  Further, the combustion control unit H monitors the state of the heated object detection switch 10 during the combustion of the standard burner 1a, and performs the combustion amount adjustment process while the heated object detection switch 10 is in the ON state. The combustion of the standard burner 1a is continued until the point-extinguishing switch 32 is switched from the ON state to the OFF state. When the point-extinguishing switch 32 is switched from the ON state to the OFF state, the flow control valve 18 is closed. A fire extinguishing process is performed and the process returns (steps # 5 to # 8).

  When the heated object detection switch 10 is turned off during combustion of the standard burner 1a, the combustion control unit H executes control when there is no heated object during combustion (steps # 5, 30).

Next, based on FIG. 11, the control when there is no object to be heated during fire extinguishing will be described.
When the point-extinguishing switch 32 is switched from the OFF state to the ON state when the object detection switch 10 is in the OFF state, the combustion control unit H causes the speaker 37 to position the object to be heated at the heating position. Guidance information (for example, guidance information such as “Place the pan”) is notified, and the elapsed time T1 after the point-off switch 32 is switched from the OFF state to the ON state is set to the standby setting time Ts1. While not reached, the state of the heated object detection switch 10 is monitored, and when the heated object detection switch 10 is turned on (steps # 21 to 23), the process returns to step # 3 of the main flowchart shown in FIG. The ignition process is performed.

Further, the combustion control unit H continues the OFF state of the heated object detection switch 10 even when the elapsed time T1 after the point-extinguishing switch 32 is switched from the OFF state to the ON state reaches the set time Ts1 for standby. If this is the case, the ignition command due to the point fire switch 32 being in the ON state is invalidated, and an alarm such as “the safety device has been activated” is notified by the speaker 37, and the front heating power corresponding to the standard burner 1a is notified. The display unit 36 and the top surface heating power display unit 71 are blinked in the same manner (steps 22, 24 to 26), the process returns to step # 1 of the main flowchart, and the point fire extinguishing switch 32 is switched from the OFF state to the ON state. Wait for.
Incidentally, the standby setting time Ts1 is set to 10 seconds, for example.

  That is, in the combustion control unit H, when the point fire extinguishing command unit 28 as the command unit is switched from the fire extinguishing command state to the ignition command state, the heated object detecting unit 10 detects the presence of the heated object. In this case, the burners 1a and 1c are ignited, and when the heated object detection means 10 detects the absence of the heated object, the burners 1a and 1c are maintained in a fire extinguishing state, and the point fire extinguishing command unit 28 When the object to be heated detecting means 10 detects the absence of the object to be heated when the fire extinguishing command state is switched to the ignition command state, and the burners 1a and 1c are maintained in the fire extinguishing state. When the heated object detecting means 10 detects the presence of the heated object, the burners 1a and 1c are ignited.

  Further, the combustion control means H is such that when the point fire extinguishing command section 28 is switched from the fire extinguishing command state to the ignition command state, the heated object detecting means 10 detects the absence of the heated object. When the burner 1a, 1c is maintained in the fire extinguishing state, the elapsed time T1 after the point fire extinguishing command unit 28 is switched from the fire extinguishing command state to the ignition command state reaches the standby set time Ts1. When the heated object detection means 10 detects the presence of the heated object, the burner 1a, 1c is ignited, and even if the elapsed time T1 reaches the standby set time Ts1, the heated object detection means 10 When the detection of the absence of the object to be heated continues, the ignition command of the point fire extinguishing command unit 28 is invalidated.

  Further, when the speaker 37 detects the absence of the object to be heated when the fire extinguishing command unit 28 is switched from the fire extinguishing command state to the ignition command state, This corresponds to notification means for notifying guidance information that prompts the object to be heated to be positioned at the heating position.

Next, the control when there is no object to be heated during combustion will be described based on FIG.
When the heated object detection switch 10 is turned OFF during combustion of the standard burner 1a, the combustion control means H immediately sets the combustion amount of the standard burner 1a to be less than the lowermost thermal power 1 of the five stages of thermal power. By adjusting the opening degree of the flow rate control valve 18 so as to reduce the combustion amount in the absence corresponding to the thermal power 2 on the first stage, the combustion amount reduction processing in the absence is performed, and the front surface corresponding to the standard burner 1a is executed. By similarly blinking the thermal power display unit 36 and the top surface thermal power display unit 71, it is informed that the standard burner 1a is in an abnormal state in which the object to be heated is not located at the heating position (step). # 31, 32).

  Subsequently, the combustion control means H monitors the pulse signal output from the rotary encoder 33, and even if the pulse signal commands the combustion amount increase change adjustment, cancels the command and burns the combustion amount. When the increase signal is not executed and the pulse signal instructs the combustion amount decrease change adjustment, only when the combustion amount decrease change adjustment command corresponding to the reduction to the lowest heating power 1 is made, A combustion amount reduction process is executed by adjusting the opening degree of the flow control valve 18 so as to reduce the combustion amount corresponding to the lower heating power 1 (steps # 33 to 36).

  Subsequently, the combustion control means H detects the heated object until the elapsed time T2 after the heated object detection switch 10 is turned off during the combustion of the standard burner 1a reaches the non-existence determination setting time Ts2. While the OFF state of the switch 10 continues and the ON state of the point fire extinguishing switch 32 continues, the processes of steps # 33 to # 36 are repeated. In the meantime, when the elapsed time T2 reaches the intermediate notification setting time Ts3 that is shorter than the non-existence determination setting time Ts2, guidance information such as “Place a pan” is notified by the speaker 37, for example. When the heated object detection switch 10 is turned on, a combustion maintaining process for maintaining the standard burner 1a in the combustion state is performed. When the point fire extinguishing switch 32 is switched from the ON state to the OFF state, the fire extinguishing process is performed. (Steps # 37 to 42, 50), the process returns to Step # 1 of the main flowchart, and waits for the point fire switch 32 to be switched from the OFF state to the ON state.

Further, the combustion control means H does not extinguish the standard burner 1a if the heated object detection switch 10 continues to be OFF even if the elapsed time T2 reaches the non-existence determination setting time Ts2. The fire extinguishing process is executed, and an alarm such as “the safety device has been activated” is notified by the speaker 37, and the ignition command due to the point fire extinguishing switch 32 being in the ON state is invalidated (steps # 37 and 41). To 43), the process returns to step # 1 of the main flowchart, and waits for the point fire extinguishing switch 32 to be switched from the OFF state to the ON state.
Incidentally, the absence determination setting time Ts2 is set to 60 seconds, for example, and the intermediate notification setting time Ts3 is set to 30 seconds, for example.

  That is, the combustion control means H immediately reduces the combustion amount of the burners 1a and 1c to the combustion amount in the absence when the heated object detection means 10 detects the absence of the heated object during combustion of the burners 1a and 1c. When the non-existing combustion amount lowering process is executed, and the elapsed time T2 after the heated object detecting means 10 detects the absence of the heated object reaches the non-existence determination setting time Ts2, the detected object is detected. When the means 10 detects the presence of the object to be heated, the combustion maintaining process for maintaining the burners 1a and 1c in the combustion state is executed, and the object to be heated is detected even if the elapsed time T2 reaches the non-existence determination setting time Ts2. When the detection of the absence of the object to be heated by the means 10 continues, the fire extinguishing process in the absence of extinguishing the burners 1a, 1c is executed.

  Further, the combustion control means H sets the second-stage combustion amount in the absence stage in the absence stage combustion amount, which is the second stage higher than the lowest stage combustion quantity in the five-stage set combustion quantity. It is comprised so that it may become a combustion amount.

  Further, the combustion control means H does not detect the combustion amount of the burners 1a and 1c after the execution of the non-existing combustion amount lowering process and continues detection of the non-heated object by the heated object detection means 10. During the reduction to the hourly combustion amount, the change adjustment to the increase side of the combustion amount of the burners 1a and 1c based on the combustion amount adjustment command from the combustion amount adjustment operation unit 29 is not executed.

Next, the combustion maintenance control will be described based on FIG.
As described above, the combustion control means H is heated until the elapsed time T2 after the heated object detection switch 10 is turned off during the combustion of the standard burner 1a reaches the non-existence determination setting time Ts2. When the object detection switch 10 is turned on, this combustion maintenance process is executed.
In this combustion maintenance process, when the thermal power before the non-existing combustion amount lowering process is the uppermost thermal power 5, the thermal power immediately increases to one lower thermal power 4 than the uppermost thermal power 5, Thereafter, a two-stage combustion amount increasing process is executed by adjusting the opening degree of the flow control valve 18 so as to return to the uppermost heating power 5 after a set time for standby (for example, 1 second) elapses. When the thermal power before execution of the existing combustion amount lowering process is lower than the uppermost thermal power 5, the opening degree of the flow control valve 18 is immediately returned to the thermal power before the non-existing combustion quantity lowering process is executed. Is adjusted to execute the normal combustion amount increasing process (steps # 51 to # 53).

  That is, the combustion control means H is configured to return the combustion amount of the burners 1a and 1c to the combustion amount before the non-existing combustion amount lowering process in the combustion maintaining process.

Further, the combustion amount corresponding to the uppermost thermal power 5 corresponds to the maximum combustion amount in the adjustment range of the combustion amount of the burners 1a and 1c, and the combustion amount corresponding to the thermal power 4 lower by one step than the uppermost thermal power 5 is the above-mentioned. This corresponds to a standby combustion amount smaller than the maximum combustion amount.
That is, in the combustion maintaining process, the combustion control means H, when the combustion amount of the burner 1a, 1c before the execution of the non-existing combustion amount lowering process is the maximum combustion amount in the adjustment range, burner 1a, 1c. The combustion amount is immediately increased to a standby combustion amount smaller than the maximum combustion amount, and then returned to the maximum combustion amount after the standby set time has elapsed.

  Subsequently, the combustion control means H performs the combustion of the standard burner 1a while there is no combustion amount change command from the combustion amount adjusting operation unit 29, the heated object detection switch 10 is in the ON state, and the fire extinguishing switch 32 is in the ON state. The state in which the amount is maintained at the combustion amount before the non-existing combustion amount reduction process is continued, or there is no combustion amount change command from the combustion amount adjustment operation unit 29 and the heated object detection switch 10 is in the ON state. In the OFF state, the above-described control for the non-heated object during combustion is executed, or there is no combustion amount change command from the combustion amount adjusting operation unit 29, and the heated object detection switch 10 is ON, and the point fire extinguishing switch 32 is ON. When the state is switched to the OFF state, the fire extinguishing process is executed (steps # 54 to 58), the process returns to step # 1 of the main flowchart, and the point fire extinguishing switch 32 is turned off. Wait to be switched from the state to the ON state.

  Further, when a combustion amount change command is instructed from the combustion amount adjustment operation unit 29 in step # 54, the combustion control means H changes the flow rate so as to change and adjust the combustion amount of the standard burner 1a to the instructed combustion amount. When the opening amount of the control valve 18 is adjusted, the combustion amount changing process is executed, and when the point-extinguishing switch 32 is continuously ON (steps # 54, 59, 60), step # of the main flowchart. Returning to 5, when the fire extinguisher switch 32 is switched from the ON state to the OFF state, the fire extinguishing process is executed (steps # 60 and 58), the process returns to step # 1 of the main flowchart, and the fire extinguishing switch 32 is turned off. Wait for the state to switch to the ON state.

[Another embodiment]
Next, another embodiment will be described.
(A) In the above embodiment, when the command control unit 28 switches the combustion control unit H from the fire extinguishing command state to the ignition command state, the heated object detection unit 10 detects that there is no heated object. By detecting, when the burners 1a and 1c are maintained in the fire extinguishing state, an elapsed time T1 after the command means 28 is switched from the fire extinguishing command state to the ignition command state is a set time for standby. Even when Ts1 is reached, if the detection of the absence of the object to be heated by the object to be heated detection unit 10 continues, the standby setting time is set when the ignition command of the command unit 28 is invalidated. Means for artificially changing and setting Ts1 may be provided.

(B) In the above embodiment, when the command control unit 28 switches the combustion control unit H from the fire extinguishing command state to the ignition command state, the object to be heated detection unit 10 has no object to be heated. When the burners 1a and 1c are maintained in the fire extinguishing state, the elapsed time T1 after the command means 28 is switched from the fire extinguishing command state to the ignition command state is set for standby. Even when the time Ts1 is reached, the detection of the non-existence of the object to be heated by the object-to-be-heated detection unit 10 has been illustrated as an example in which the ignition command of the command unit 28 is invalidated. Such a process of invalidating the ignition command of the command means 28 may be eliminated.
(C) As the combustion maintaining process, the form exemplified in the above embodiment, i.e., the combustion in which the combustion amount is returned to the combustion amount before the execution of the non-existing combustion amount lowering process is set as the combustion state, and the burner 1a, It is not limited to the form in which the combustion of 1c is maintained.
For example, it is possible to adopt a mode in which the combustion of the burner 1a, 1c is maintained with the combustion based on the non-existing combustion amount reduced in the non-existing combustion amount reducing process as a combustion state.
Alternatively, the combustion of the burners 1a and 1c is maintained by setting the combustion by the combustion amount larger than the combustion amount at the time of absence and smaller than the combustion amount before the execution of the reduction processing of the combustion amount at the time of absence as a combustion state. Is possible.
Alternatively, when the combustion amount before the non-existing combustion amount lowering process is the maximum combustion amount, combustion by a combustion amount that is smaller than the maximum combustion amount and larger than the non-existing combustion amount When the combustion amount before the execution of the non-existing combustion amount lowering process is smaller than the maximum combustion amount, the combustion by the combustion amount before the execution of the non-existing combustion amount lowering process is performed. As the combustion state, it is possible to adopt a form in which the combustion of the burners 1a and 1c is maintained.

(D) The specific configuration of the object to be heated detection means is not limited to the object to be heated detection switch 10 illustrated in the above embodiment.
For example, a magnet and a reed switch which are arranged separately on both lateral sides of the up and down movable part 9b, and when the up and down movable part 9b is pushed down, the magnet is located between the reed switch and the up and down movable part. It can be constituted by a magnetic body attached to the up and down movable portion 9b so that it exits from between the magnet and the reed switch when 9b returns upward.
Alternatively, the presence of the object to be heated is detected when the projection light is reflected by the object to be heated positioned at the heating position or when the projection light is shielded by the object to be heated positioned at the heating position. It is possible to configure with an optical sensor configured as described above.
Alternatively, it can be configured by a load sensor arranged so that the detected weight varies when the object to be heated is placed on the virtues 6.

Perspective view of stove Block diagram showing stove control configuration Vertical section of the stove near the burner Diagram showing the configuration of the flow control valve The figure which shows the principal part of the flow control valve The figure which shows the structure of a point fire extinguishing command part and a combustion amount adjustment operation part The figure explaining the operation state of a point fire extinguishing command part and a combustion amount adjustment operation part Diagram showing front thermal power display Figure showing the top display The figure which shows the flowchart of control action The figure which shows the flowchart of control action The figure which shows the flowchart of control action The figure which shows the flowchart of control action

Explanation of symbols

1a, 1c Burner 10 Object to be heated detection means 28 Command means 37 Notification means H Combustion control means

Claims (3)

A burner for heating an object to be heated located at a heating position;
A heated object detecting means for detecting whether or not a heated object is present at the heating position;
Command means switchable between an ignition command state for instructing an ignition command for the burner and a fire extinguishing command state for instructing a fire extinguishing command for the burner;
When the command means is switched from the fire extinguishing command state to the ignition command state, if the heated object detecting means detects the presence of the heated object, the burner is ignited, and the heated object A stove provided with combustion control means for maintaining the burner in a fire extinguishing state when the object detection means detects the absence of an object to be heated;
When the command means is switched from the fire extinguishing command state to the ignition command state, the combustion control means detects the absence of the object to be heated by the heated object detection means, When maintaining the fire extinguishing state, the heated object detection means is configured to ignite the burner when detecting the presence of the heated object ,
When the command means is switched from the fire extinguishing command state to the ignition command state, the heated object is detected at the heating position when the heated object detection means detects the absence of the heated object. A stove provided with notifying means for notifying guidance information prompting to be positioned by voice .   When the command means is switched from the fire extinguishing command state to the ignition command state, the combustion control means detects the absence of the object to be heated by the heated object detection means, When the command means is switched from the fire command state to the ignition command state when the command means is maintained in the fire extinguishing state, the heated object detection means is heated until the set time for standby is reached. When detecting the presence of the object to be heated by the object to be heated detection means even if the burner is ignited and the elapsed time reaches the set time for standby, The stove according to claim 1, wherein the stove is configured to invalidate an ignition command of the command means. The combustion control means reduces the combustion amount of the burner to the non-existing combustion amount immediately when the heated object detection means detects the absence of the heated object during combustion of the burner. When the elapse time after the lowering process is executed and the heated object detecting means detects the absence of the heated object reaches the non-existence determining set time, the heated object detecting means is present. Is detected, the combustion maintaining process for maintaining the burner in a combustion state is executed, and the presence of the object to be heated is detected by the object to be heated detection means even when the elapsed time reaches the non-existence setting time. The stove according to claim 1 , wherein when there is a continuation, a fire extinguishing process in the absence of extinguishing the burner is performed .

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