JP2006097976A - Cooking stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooking stove capable of preventing the use of a loading state detecting means in an abnormal state. <P>SOLUTION: This cooking stove having a loading state detecting means D for detecting a heated object loading state where the heated object is loaded on a loading portion for loading the heated object heated by burners 1a, 1c, and a heated object non-loading state where the heated object is not loaded on the loading portion, is provided with a control means H to take measures to abnormality, when a loading state duration time at which the loading state detecting means D continuously detects the heated object loading state, reaches a set time to determine abnormal continuation of loading state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, the object to be heated is placed on the placement part for placing the object to be heated to be heated by the burner, and the object to be heated is not placed on the placement part. The present invention relates to a stove provided with a mounting state detection means for detecting a non-heated object mounting state.

  Such a stove can detect whether the object to be heated is placed on the placement part or whether the object to be heated is not placed on the placement part. The detection information indicating whether the object to be heated is placed or not being placed is used for controlling the operation of the burner, for example.

  That is, if a non-placed state of the object to be heated is detected by the placement state detection means when the ignition instruction of the burner is instructed by the point fire extinguishing command means, ignition of the burner is prohibited and the burner is placed during combustion. The burner operation is controlled based on the detection information of the placement state detection means in such a manner that the combustion of the burner is stopped or the amount of combustion is reduced when the placement object detection means detects the non-heated object placement state. Thus, the stove can be used safely (see Patent Document 1).

  Incidentally, in Patent Document 1, the above-described placement state detection means is pressed down as the bottom of the article to be heated placed on the placement section comes into contact with and detects the article to be heated placement state. And can be moved up and down over a placement state detection position for detecting the heated object non-placement state above the placement state detection position, and Detecting the state of the object to be heated by detecting a state in which the vertically movable portion returned to the non-placed state detection position is biased, and a state in which the vertically movable portion is located at the placement state detection position; and And a detection unit that detects the state where the object to be heated is not placed by detecting a state in which the vertically movable portion is located at the non-placement state detection position.

  Moreover, although not described in the said patent document 1, as a said mounting state detection means, a to-be-heated object mounting state is determined by whether a projection light is reflected by the presence or absence of the to-be-heated object on a mounting part. Or a reflection type optical sensor configured to detect whether the object to be heated is not placed, or whether the projection light is blocked by the presence or absence of the object to be heated on the placement unit. In some cases, it is configured by a photo-interrupter type optical sensor configured to detect whether it is in the placed state or not in the heated object placement state.

JP-A-8-303785

By the way, there is a possibility that the above-mentioned placement state detection means becomes abnormal. For example, when the placement state detection means is configured by the vertically movable portion and the detection portion as described above, the vertically movable portion is located at the placement state detection position due to the broth overflowing from the pan or the like as the object to be heated. An abnormality that is detected as a heated object placement state by the placement state detection means despite the fact that the detection part has failed or the detection part has failed and the object to be heated is not placed on the placement part ( Hereinafter, there may be a case where the heated object placement state continuous detection abnormality may occur.
Alternatively, even when the above-described placement state detection unit is configured by the reflection type photosensor or the photo interrupter type photosensor, the heated object placement state continuous detection abnormality may occur. For example, in the case of a photo-interrupter type optical sensor, when the light emitting part or the light receiving part is clouded by the broth overflowing from a pan or the like, the above-described heated object placement state continuous detection abnormality may occur.

  However, in the conventional stove, when the above-described mounting state detecting means becomes abnormal, there is a possibility that the stove is used while the mounting state detecting means remains abnormal, and improvement has been desired.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a stove that can avoid the use of the mounting state detecting means in an abnormal state.

In the stove according to the present invention, the object to be heated is placed on the placement part on which the object to be heated to be heated by the burner is placed, and the article to be heated is placed on the placement part. There is provided a mounting state detection means for detecting a non-heated object non-loading state,
In the first feature configuration, when the placement state continuation time during which the placement state of the object to be heated is continuously detected by the placement state detection means reaches the set time for the placement state continuation abnormality determination, the abnormality countermeasure process is performed. It is characterized in that control means for executing is provided.

  That is, when the placement state continuation time in which the placement state of the object to be heated is continuously detected by the placement state detection means reaches the set time for determining the placement state continuation abnormality, the control means executes the abnormality countermeasure process. To do.

That is, the setting time for determining the standing state continuation abnormality is set to a time during which it is considered that the object to be heated is not normally placed on the placement unit. Generally, the life cycle is switched in 24 hours, and it is considered that a state in which the heated part is not placed on the placing part may occur. Therefore, if the setting time for placing state continuation abnormality determination is set to about 96 hours, for example, As the setting time for determining the mounting state continuation abnormality, it is possible to set the time when it is considered that the state in which the object to be heated is continuously mounted on the mounting unit is almost impossible.
Accordingly, since the heated object is considered to be removed from the placement portion by the user at least once during the set time for the standing state continuation abnormality determination, the setting state time for the continuation state abnormality determination is set. If the state in which the placement state detecting means continues to detect the heated object placement state continues, it is possible to estimate that the heated object placement state continuous detection abnormality has occurred.

Therefore, when the previous placement state continuation time reaches the previous placement state continuation abnormality determination setting time, it is estimated that a heated object placement state continuous detection abnormality has occurred, and the abnormality countermeasure processing is automatically performed. Let it run.
Then, as the abnormality countermeasure processing, for example, by prohibiting combustion of the burner or by notifying information indicating that the abnormality is detected by the notification means, the stowage state detection means is controlled in an abnormal state. Can be avoided.

In addition to the first feature configuration, the second feature configuration is
The control means, as the abnormality countermeasure processing,
When the previous placement state continuation time reaches the previous placement state continuation abnormality determination setting time, the notifying means informs the guide information for urging to raise the object to be heated from the previous placement portion, and after the guidance information is notified Until the set time for redetermination reaches the set time for redetermination, the placement state detecting means determines that the object to be heated is not placed and is normal, and the elapsed time reaches the set time for redetermination. However, it is characterized in that it is configured to execute an abnormality determination process for determining that it is abnormal when the above-described placement state detection means continues to detect the heated object placement state. .

  That is, as the abnormality countermeasure process, the control means provides guidance information that prompts the reporting means to lift the object to be heated from the placement portion when the placement state duration time reaches the placement state continuation abnormality determination setting time. When the placement state detecting means detects the non-heated object placement state until the elapsed time after the guidance information notification reaches the redetermination setting time, it is judged that the normal state is detected and the elapsed time is re-established. Even if the set time for determination has been reached, if the state where the mounting state detection means continues to detect the heated object mounting state, an abnormality determination process is performed to determine that there is an abnormality.

That is, when the placement state continuation time reaches the placement state continuation abnormality determination setting time, the notification means prompts the user to raise the object to be heated from the placement unit by the notifying means. It is possible to raise the object to be heated from the mounting portion.
And if a user raises a to-be-heated object from a mounting part based on the alerting | reporting of the guidance information by an alerting | reporting means, if a mounting state detection means is normal, a to-be-heated object will not be mounted by a mounting state detection means. The state is detected, and if the heated object placement state continuous detection abnormality has occurred, the placed state detection means still detects the heated object placement state.
The re-discrimination setting time is set to a time during which the user can sufficiently raise the object to be heated from the placement unit by knowing the notification of the guide information by the notification means, for example, about 5 minutes.

Then, when the placement state detecting means detects the non-placement state of the object to be heated before the elapsed time after the guidance information notification reaches the redetermination set time, it is determined that the state is normal, and the elapsed time is reset. Even if the set time for determination has been reached, if the state where the mounting state detection means continues to detect the object to be heated is determined to be abnormal, the mounting state detection means is normal. In spite of the fact that the object to be heated has been placed on the placing part for the set time for determining the standing state continuation abnormality, the to-be-heated object placing state continuous detection abnormality has occurred. By avoiding erroneous determination, it is possible to accurately determine the heated object placement state continuous detection abnormality as described above.
Therefore, it is possible to more accurately avoid the use of the stove when the mounting state detection means is in an abnormal state.

The third feature configuration is in addition to the second feature configuration,
The control means performs the abnormality determination process as the abnormality countermeasure process when the setting state continuation time reaches the setting state continuation abnormality determination setting time, and the ignition command of the burner is issued by the point fire extinguishing command means. It is characterized by being configured to execute when commanded.

That is, the control means performs the abnormality determination process as the abnormality countermeasure process when the previous set state duration time has reached the set time for determining the set state continuous abnormality and the ignition command for the burner is set by the point fire extinguishing command unit. Executed when is commanded.
That is, the abnormality determination process as the abnormality countermeasure process is not executed under the condition that the previous set state continuation time reaches the set state continuation abnormality determination time. By executing in a state where the conditions for commanding the ignition command are also satisfied, it is possible to reliably notify the user of the notification of the guide information by the notification means. It is possible to avoid the execution in a state where it is not lifted from the placement unit, and to accurately execute the object to be heated while being lifted from the placement unit.
Therefore, it is possible to more accurately determine the abnormality in detecting whether the object to be heated is placed continuously, and thus it is possible to more accurately avoid using the stove when the placing state detecting unit is in an abnormal state.

In addition to the second or third feature configuration, the fourth feature configuration is
If it is determined that the control unit is normal in the abnormality determination process, the control unit causes the notification unit to notify the information indicating that the placement state detection unit is normal, and is abnormal in the abnormality determination process. If it is determined, it is characterized in that it is configured to execute a re-abnormality countermeasure process.

That is, when it is determined that the control unit is normal in the abnormality determination process, the control unit notifies the information indicating that the placement state detection unit is normal, and the control unit determines that the abnormality is detected in the abnormality determination process. Then, a re-abnormality countermeasure process is executed.
In other words, when the placement state detection means is normal, the notification means informs the information indicating that the placement state detection means is normal, so that the user can confirm that the placement state detection means is normal. On the other hand, if the mounting state detection means is abnormal, the re-abnormality countermeasure processing is executed, so the stove of the stove in the abnormal state is placed. It is possible to avoid use.

In addition to the fourth feature configuration, the fifth feature configuration includes:
The control means is configured to execute a fire extinguishing state maintaining process for maintaining the burner in a fire extinguishing state as the re-abnormality countermeasure process even if the burner ignition command is commanded by the point fire extinguishing command means. Features a point.

In other words, when the heated object placement state continuous detection abnormality occurs, the fire extinguishing state maintaining process for maintaining the burner in the fire extinguishing state is executed even when the burner ignition command is instructed by the point fire extinguishing command means.
In other words, when the heated object placement state continuous detection abnormality occurs, the burner is not ignited even if an ignition command is commanded by the point fire extinguishing command means.
Accordingly, it is possible to avoid the burner from being ignited even though the object to be heated is not placed on the placement portion, and thus the safety can be further improved.

In addition to any of the first to fifth feature configurations described above, the sixth feature configuration is
The control means is configured to execute a combustion suppression process for stopping combustion of the burner or reducing a combustion amount in the non-heated object placement state based on the detection information of the placement state detection means. It is characterized by that.

That is, the control means executes a combustion suppression process for stopping the combustion of the burner or reducing the combustion amount in the non-heated object placement state based on the detection information of the placement state detection means.
That is, when the non-heated object placement state is detected by the placement state detection means when the burner ignition command is commanded by the point fire extinguishing command means, the burner ignition is performed as the combustion suppression process. When the process of prohibiting, i.e., stopping the combustion of the burner is executed and the mounted state detection means detects the non-heated object mounted state during the burner combustion, As described above, the safety function that executes the process of stopping the combustion of the fuel or reducing the amount of combustion is known.
Further, the safety is further improved by adding the safety function of executing the abnormality countermeasure process when it is estimated that the abnormality in detecting the continued state of the object to be heated has occurred, in addition to such a known safety function. Will be able to.

In addition to any of the first to sixth feature configurations described above, the seventh feature configuration is
When the power supply switch is switched from on to off, the control means detects power to the control means when the placement state detection means detects the heated object placement state. The power supply from the power supply means is continued, and the power supply from the power supply means is stopped when the placement state detection means detects the non-heated object placement state. It is characterized by being configured as follows.

That is, the control means supplies power to the control means from the power supply means when the placement state detection means detects the heated object placement state when the power switch is switched from on to off. When the placement state detection means detects the non-heated object placement state, the power supply from the power supply means is stopped.
That is, when the power supply switch is switched from on to off, and the placement state detection means detects the placement state of the object to be heated, the placement state duration time is measured even when the power switch is off. In order to continue the power supply, the power supply from the power supply means is continued. On the other hand, when the power switch is switched from on to off, the placement state detection means detects the non-heated object placement state. Therefore, since it is not necessary to continue the measurement of the mounting state duration time, the power supply from the power supply means is stopped.
Therefore, it becomes possible to avoid the use of the stove in the abnormal state of the mounting state detection means while making it possible to reduce the energy cost by reducing the power consumption. It was.

In addition to any of the first to seventh feature configurations described above, the eighth feature configuration is
The above-mentioned installation state detection means is
From the placement state detection position for detecting the heated object placement state, which is pushed down as the bottom of the article to be heated placed on the placement portion comes into contact, and the placement state detection position An up-and-down movable part that is movable up and down over a non-mounted state detection position for detecting the non-mounted state of the object to be heated and that is urged to return to the non-mounted state detection position. ,
Detecting the state of the object to be heated by detecting a state in which the vertically movable portion is located at the placement state detection position, and a state in which the vertically movable portion is located at the non-placement state detection position. And a detection unit that detects the non-heated object placement state by detection.

That is, when an object to be heated is placed on the placement part, the bottom of the object to be heated comes into contact with the vertical movable part, and the vertical movable part is pushed down from the non-placement state detection position to the placement state detection position. Along with this, the detection unit detects the state in which the vertically movable portion is positioned at the placement state detection position, thereby detecting the object to be heated placement state.
On the other hand, when the object to be heated is lifted from the placement part, the vertical movable part is returned from the placement state detection position to the non-placement state detection position by the upward biasing force, and accordingly, the detection part By detecting the state where the movable part is positioned at the non-placement state detection position, the non-placement state of the object to be heated is detected.
That is, when the object to be heated is placed on or raised from the placement unit, the vertical movable unit is moved up and down between the placement state detection position and the non-placement state detection position, and the detection unit By detecting the state where the vertically movable part is located at the placement state detection position and the state located at the non-placement state detection position, the heated object placement state and the heated object non-placement state are detected. By doing so, for example, using an optical sensor, erroneous detection can be performed compared to a case in which a heated object placement state and a heated object non-placement state are detected in a non-contact state. It becomes possible to suppress, and it becomes possible to detect appropriately a to-be-heated object mounting state and a to-be-heated object mounting state.

By the way, when the placement state detection means is configured to include the up and down movable portion and the detection portion in this way, for example, the up and down movable portion is detected by the boiling liquid overflowing from the pan or the like as the object to be heated. There is a case where the object to be heated is stuck in the position and the heated object placement state continuous detection abnormality occurs.
And if the vertically movable part is stuck in the above-described placement state detection position in such a manner, even if the heated object is lifted from the placement part, the detection part detects the heated object placement state. When the placement state duration time for which the object to be heated placement state is continuously detected by the detection unit reaches the set time for the placement state continuation abnormality determination described above, an abnormality occurs. Since the countermeasure process is executed, it is possible to avoid the use of the stove when the mounting state detecting means is in an abnormal state.
Accordingly, it is possible to appropriately detect the heated object placement state and the non-heated object placement state, while avoiding the use of the stove when the placement state detection unit is in an abnormal state.

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. Furthermore, corresponding to each of the standard burner 1a, the small burner 1b, and the high heating power burner 1c, the five virtues 6 are placed and supported as placement parts for placing a heated object (such as a pan) to be heated by each. Yes.
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 a control unit) 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. 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.

Each of the standard burner 1a and the high thermal power burner 1c has a cover on which an object to be heated is placed, as shown in FIGS. 2 and 3 (however, only the standard burner 1a is shown in FIG. 3). A placement state detection unit D is provided as a placement state detection unit that detects the placement state of the heated object and the non-heated object placement state in which the article to be heated is not placed on the virtues 6.
The placement state detection unit D is pushed down as the bottom of the object to be heated placed on the virtues 6 comes into contact with the placement state detection position for detecting the placement state of the object to be heated. It can be moved up and down over the non-mounted state detection position for detecting the non-mounted state of the object to be heated above the mounted state detection position, and is returned to the non-mounted state detection position. The telescopic mechanism 9 provided with the vertically movable portion 9b and the vertically movable portion 9b are detected in a state where the vertically movable portion 9b is located at the above-described placement state detection position, thereby detecting the heated object placement state and vertically movable. An object to be heated detection switch 10 is provided as a detection part that detects the state where the object to be heated is not placed by detecting a state where the part 9b is located at the non-placed state detection position.

  The expansion / contraction mechanism 9 will be described. As shown in FIG. 3, the expansion / contraction mechanism 9 is configured such that a vertically movable portion 9b is moved upward by a spring (not shown) on a guide support portion 9a fixed to the casing. It is configured to be supported so as to be movable in the up-down direction in a state where the return bias is applied.

  When the object to be heated is not placed on the virtues 6, the non-mounting state in which the upper and lower movable portions 9 b are protruded from the upper end portion that receives the object to be heated in the virtues 6 by the return biasing force. As the object to be heated is placed on the virtues 6, the vertically movable portion 9b is pushed down by the bottom of the object to be heated and is positioned at the above-described position detection position. It becomes a contracted state.

The heated object detection switch 10 is turned on when the vertically movable portion 9b of the expansion / contraction mechanism 9 is pushed down by the heated object placed on the virtues 6 and positioned at the placement state detection position. When the placed object to be heated is lifted and the vertically movable portion 9b returns upward and is positioned at the non-mounted state detection position, it is provided so as to be turned off.
That is, when the heated object detection switch 10 is turned on, a state where the up and down movable portion 9b is located at the placement state detection position is detected, the heated object placement state is detected, and the heated object detection switch 10 is detected. Is in a state in which the up-and-down movable part 9b is located at the non-placed state detection position and the heated object non-placed state is detected.

  Further, as shown in FIG. 2, the small-scale burner 1b is also provided with the expansion / contraction mechanism 9 in the same manner as the standard burner 1a and the high thermal power burner 1c.

  And the temperature sensor 11 is provided in the upper end part of the up-and-down movable part 9b of the expansion-contraction mechanism 9 corresponding to each of the standard burner 1a, the small burner 1b, and the high thermal power burner 1c, and the to-be-heated mounted on the five virtues 6 The temperature sensor 11 is configured to detect the temperature of the object to be heated in a state where 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. A manually operated point-extinguishing command unit 28, burners 1a, 1b as a point-extinguishing command means that can be switched between an ignition command state for commanding other ignition commands and a fire-extinguishing command state for commanding fire extinguishing commands for burners 1a, 1b, 1c , 1c, an artificially operated combustion amount adjusting operation unit 29 for instructing adjustment of the combustion amount (thermal power), and a setting input panel 50 for instructing cooking setting are provided. A setting input panel 60 for instructing fire extinguishing and heating 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, a configuration for supplying electric power from a power source 41 as power source means to the combustion control unit H will be described with reference to FIG.
When the power switch 40 is turned on, a power supply control unit 42 is provided for supplying power from the power supply 41 to the combustion control unit H.
The combustion control unit H is supplied with power from the power source 41, and based on various control commands commanded by the manual operation unit S, the original gas valve 12, the flow rate control valve 18, and the spark plug 7 Etc., each of them is given a drive signal to control the operation thereof.

  Further, when the power switch 40 is turned off, the combustion control unit H operates the power supply control unit 42 so as to stop the supply of power to the power supply control unit 42 by giving a power supply holding signal OFF command to the power supply control unit 42. The power supply control unit 42 can be switched to a state where the power supply control unit 42 is operated by giving a power supply holding signal ON command to the power supply control unit 42 so as to continue supplying power to itself.

Next, the control configuration of the combustion control unit H will be described.
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.

  Although the details will be described later, the combustion control unit H is a placement state duration T1 (hereinafter simply referred to as a placement state duration time) in which the placement state of the heated object is continuously detected by the placement state detection unit D. When the ignition command is instructed from the fire extinguishing command unit 28 until the mounting state continuation time T1 reaches the mounting state continuation abnormality determination setting time Ts1. In addition, when the placement object detection state is detected by the placement state detection unit D, normal combustion control for igniting and burning the standard burner 1a is executed, and the placement state duration T1 is continued for the placement state. When the abnormality determination set time Ts1 is reached, an abnormality countermeasure process is executed.

  Further, the combustion control unit H performs a combustion suppression process for stopping the combustion of the standard burner 1a or reducing the combustion amount in the non-heated object placement state based on the detection information of the placement state detection unit D described above. Is configured to run.

The control operation of the combustion control unit H will be described below based on the flowcharts shown in FIGS.
First, the main control operation will be described based on FIG. 11 and FIG.
When the power switch 40 is turned on and power is supplied from the power source 41 (step # 1), the combustion control unit H determines whether or not the object to be heated detection switch 10 is in the ON state (step # 2). In the ON state, the measurement of the placement state duration time T1 is started (step # 4). In the OFF state, the placement state duration time T1 is reset (step # 3) and then heated. It is determined whether or not the object detection switch 10 is in an ON state (step # 5).

  The combustion controller H determines that the object to be heated detection switch 10 is in the ON state in Step # 5, determines that the power switch 40 is in the ON state in Step # 6, and determines that the fire extinguishing switch 32 is in the OFF state in Step # 7. During the determination, the measurement of the mounting state duration time T1 is continued. When the power switch 40 is OFF in step # 6, the process proceeds to step # 19, and the power lamp (not shown) on the front panel 38 is turned on. When the heated object detection switch 10 is in the ON state in step # 20, the power supply control unit 42 is instructed to turn on the power holding signal ON, and the supply of power to itself is continued. When the heated object detection switch 10 is in the ON state (steps # 21 and 22), the mounting state duration time T1 is continuously measured.

When the power switch 40 is turned on in step # 22, the combustion controller H returns to step # 7, and in step # 7, determines whether or not the fire extinguishing switch 32 is on, and the fire extinguishing switch 32 is turned off. When the state is in the state, the process returns to step # 5. When the point fire extinguishing switch 32 is in the ON state in step # 7, it is determined in step # 8 whether or not the object to be heated detection switch 10 is in the ON state.
When the heated object detection switch 10 is OFF in step # 8, the non-heated object control during fire extinguishing described later is executed (step # 40), and when the heated object detection switch 10 is ON in step # 8 In Step # 9, it is determined whether or not the mounting state continuation time T1 has reached the mounting state continuation abnormality determination setting time Ts1, and if not, normal combustion control described later is executed ( Step # 50). Incidentally, the setting time continuation abnormality determination setting time Ts1 described above is set to 96 hours, for example.

  In other words, the combustion control unit H gives a power holding signal ON command to the power control unit 42 when the object detection switch 10 is in the ON state even when the power switch 40 is in the OFF state. It is configured to continue the measurement of the above-described installation state duration T1 by continuing the supply of electric power.

When it is determined in step # 5 that the heated object detection switch 10 is in the OFF state, the combustion control unit H resets the placement state duration T1 (step # 23), and in step # 24, the power switch 40 is in the ON state. When the power switch 40 is in the OFF state, the power supply control unit 42 is instructed to turn off the power holding signal to stop the power supply to itself (step # 25). finish.
If the heated object detection switch 10 is determined to be in the OFF state in step # 20, the combustion control unit H resets the mounting state duration time T1 and the elapsed time T2 after notification information notification described later, and the power source control unit 42. Is given a power holding signal OFF command to stop the supply of power to itself (steps # 26 and 27), and the process ends.

  If the combustion control unit H determines in step # 9 that the mounting state duration T1 has reached the mounting state continuation abnormality determination setting time Ts1, the standard burner 1a is activated even if the point-off switch 32 is switched to the ON state. The fire extinguishing state maintaining process for maintaining the fire extinguisher state without igniting the lamp is performed, and guidance information that prompts the speaker 37 as a notification means to raise the object to be heated from the five virtues 6 such as “Please raise the pan” The measurement is started and the measurement of the elapsed time T2 after the guidance information notification, which is the elapsed time after the notification of the guidance information, is started, and the front thermal power display unit 36 and the top thermal power display unit 71 corresponding to the standard burner 1a are similarly flashed. (Steps # 10 to 13).

  Subsequently, the combustion controller H changes the heated object detection switch 10 from the ON state to the OFF state until the elapsed time T2 after the guidance information notification reaches the redetermination setting time Ts2 (steps # 14 and 15). ), Resetting the standing state duration T1 and the elapsed time T2 after the guidance information notification, turning off the front thermal power display unit 36 and the top thermal power display unit 71, and causing the speaker 37 to indicate “sensor is normal”, etc. Information indicating that the mounting state detection unit D is normal is notified (steps # 28 to 30), and the process proceeds to step # 5. Incidentally, the re-discrimination setting time Ts2 is set to 5 minutes, for example.

  Then, the process proceeds to Step # 5, and in Steps # 5 to # 8, the heated object detection switch 10 is turned on, the power switch 40 is turned on, the fire extinguishing switch 32 is turned on, and the heated object detection switch 10 is turned on. If it is determined in step # 9 that the mounting state duration time T1 has not reached the mounting state continuation abnormality determination setting time Ts1, normal combustion control described later is executed and the standard burner 1a is executed. Will be ignited.

In addition, the combustion control unit H, when the elapsed time T2 after the guidance information notification reaches the redetermination setting time Ts2, if the ON state of the heated object detection switch 10 continues (step # 14, 15) The fire extinguishing state maintaining process is executed to maintain the fire extinguishing state without igniting the standard burner 1a even if the point fire extinguishing switch 32 is switched to the ON state, and the speaker 37 has an abnormality such as “a fault has occurred”. Information is notified, and the front thermal power display unit 36 and the top thermal power display unit 71 corresponding to the standard burner 1a are similarly blinked to notify that an abnormality has occurred (steps # 16 to 18).
Subsequently, in step # 19, the power lamp is turned off, and while the heated object detection switch 10 is in the ON state, the power control signal is given to the power control unit 42 even if the power switch 40 is in the OFF state. Then, the supply of power to itself is continued, and the measurement of the mounting state duration time T1 is continued (steps # 20 to 22). When the heated object detection switch 10 is turned off (step # 20), the step # 20 is performed. 26 and 27 are executed to reset the mounting state duration time T1 and the elapsed time T2 after the guidance information is notified, and the power supply control unit 42 is instructed to turn off the power holding signal to stop the supply of power to itself. And exit.
When the power switch 40 is turned on in step # 22, the process returns to step # 7. However, since the elapsed time T2 after the guidance information notification exceeds the redetermination setting time Ts2, the standard burner is used in the subsequent control. 1a is never ignited.

  That is, in the flowcharts shown in FIGS. 11 and 12, in step # 7, the fire extinguishing switch 32 is in the ON state, in step # 8, the heated object detection switch 10 is in the ON state, and in step # 9, the above-described installation state. When the continuation time T1 reaches the setting state continuation abnormality determination setting time Ts1 described above, an abnormality determination process constituted by a series of processes of steps # 10 to 15 is executed as the abnormality countermeasure process. Yes.

  In other words, the combustion control unit H performs the abnormality determination process as the abnormality countermeasure process, when the placement state continuation time T1 reaches the placement state continuation abnormality determination set time Ts1 and the point extinguishing command unit 28 The standard burner 1a is configured to be executed when an ignition command is issued.

  Further, as the abnormality countermeasure processing, the combustion control unit H raises the object to be heated from the five virtues 6 to the speaker 37 when the above-described installation state duration time T1 reaches the above-described installation state duration abnormality determination setting time Ts1. It is normal if the placement state detection unit D detects the non-heated object placement state until the elapsed time T2 after the guidance information notification reaches the redetermination setting time Ts2 after the guidance information is notified. And when the state where the placement state detection unit D detects the placement state of the object to be heated continues even if the elapsed time T2 reaches the re-discrimination setting time Ts2, it is judged as abnormal. An abnormality determination process is performed.

And if the combustion control part H discriminate | determines that it is normal by the said abnormality discrimination | determination process, it will alert | report the information which shows that the mounting state detection part is normal to the speaker 37 (the said step # 30), and the said abnormality discrimination | determination If it is determined that the process is abnormal, the re-abnormality countermeasure process is executed.
And the combustion control part H performs the fire extinguishing state maintenance process which maintains the standard burner 1a in a fire extinguishing state even if the ignition command of the standard burner 1a is commanded by the point fire extinguishing command part 28 as the re-abnormality countermeasure process. It is configured.
That is, the re-abnormality countermeasure process is configured by a series of processes of steps # 16 to # 18.

In addition, the combustion control unit H is configured so that the heated object detection switch 10 is in the ON state, that is, while the heated object placement state is continuously detected by the placement state detection unit D, the power switch 40 Even when is switched to the OFF state, the power supply control unit 42 is configured to continue the measurement of the mounting state duration time T1 by supplying the power holding signal ON command to continue the power supply to itself. ing.
Further, the combustion control unit H turns on the power switch 40 when the heated object detection switch 10 is turned off, that is, when the loaded object detection unit D detects the non-heated object loaded state. When switched from OFF to OFF, the power supply control unit 42 is instructed to turn off the power holding signal and stop the supply of power to itself.
That is, the combustion control unit H, when the placement state detection unit D detects the heated object placement state when the power switch is switched from on to off, When the power supply from the power supply 41 that supplies power for operation is continued and the placement state detection unit D detects the non-heated object placement state, the power supply from the power supply 41 is performed. It is configured to stop.

Next, based on FIG. 13, description will be added about the control when no object to be heated during fire extinguishing.
When the point-extinguishing switch 32 is switched from the OFF state to the ON state when the object-to-be-heated detection switch 10 is in the OFF state (steps # 7 and 8), the combustion control unit H is in the ON state. The ignition command is invalidated, the standard burner 1a is kept in the fire extinguisher state, and the speaker 37 prompts the user to place an object to be heated on Gotoku 6 (for example, “Place a pan” 11), the front thermal power display unit 36 and the top thermal power display unit 71 corresponding to the standard burner 1a are similarly blinked (steps # 41 to 43), and the steps of the main flowchart shown in FIG. Returning to # 7, it is determined again whether or not the point fire switch 32 is in the ON state.

  That is, as described above, when the point-extinguishing switch 32 is switched from the OFF state to the ON state while the standard burner 1a is extinguished, the ignition process is not executed if the heated object detection switch 10 is in the OFF state. The process of maintaining the standard burner 1a in the fire extinguishing state corresponds to the combustion suppression process.

Next, the normal combustion control will be described with reference to FIG.
In the normal-time combustion control, the combustion control unit H first performs an ignition process for opening the flow rate control valve 18 and applying a drive signal to the spark plug 7 to cause ignition to ignite the standard burner 1a ( While the point fire extinguishing switch 32 is in the ON state and the heated object detection switch 10 is in the ON state, the combustion amount corresponding to the thermal power at the stage corresponding to the pulse signal output from the rotary encoder 33 is obtained. Thus, by adjusting the opening degree of the flow control valve 18, the combustion of the standard burner 1 a is continued while performing the combustion amount adjustment process (steps # 52 to 54).

  Further, as described above, when the point fire extinguishing switch 32 is switched from the ON state to the OFF state while the standard burner 1a is burning as described above (step # 52), the combustion control unit H executes the fire extinguishing process. (Step # 59), returning to step # 7 of the main flowchart shown in FIG. 11, it is determined again whether or not the point fire extinguishing switch 32 is in the ON state.

  Further, as described above, when the heated object detection switch 10 is turned off while the standard burner 1a is burning (step # 53), the combustion control unit H immediately sets the combustion amount of the standard burner 1a. The opening degree of the flow control valve 18 is adjusted so as to reduce the combustion amount in the absence corresponding to the thermal power 2 that is one stage higher than the thermal power 1 at the lowest stage among the five stages of thermal power, and corresponds to the standard burner 1a. By flashing the front thermal power display unit 36 and the top thermal power display unit 71 in the same manner, the standard burner 1a is in an abnormal state in which the heated object is not placed on the Gotoku 6 Notification is made (steps # 55 and 56).

  That is, when the heated object detection switch 10 is turned off during the combustion of the standard burner 1a, the process for immediately reducing the combustion amount of the standard burner 1a to the combustion amount in the absence corresponds to the combustion suppression process.

  Subsequently, the combustion control unit H detects the heated object until the elapsed time T3 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 Ts3. While the OFF state of the switch 10 continues and the ON state of the point fire extinguishing switch 32 continues, the state where the combustion amount of the standard burner 1a is reduced to the combustion amount in the absence is continued (step # 52). , 53, 55 to 57), when the heated object detection switch 10 is turned on (step # 53), the combustion amount corresponding to the thermal power at the stage corresponding to the pulse signal output from the rotary encoder 33 is obtained. After performing the combustion amount adjustment process by adjusting the opening degree of the flow control valve 18 so as to become (step # 54), the process returns to step # 52, and after step # 52 To run the management.

Further, the combustion control section H, if the OFF state of the heated object detection switch 10 continues (step # 57) even if the elapsed time T3 reaches the non-existence determination setting time Ts3 (step # 57), The ignition command due to the fact that 32 is in the ON state is invalidated, fire extinguishing processing is executed (steps # 58 and 59), the process returns to step # 7 of the main flowchart shown in FIG. Whether or not is in an ON state is determined.
Incidentally, the absence determination setting time Ts3 is set to 60 seconds, for example.

[Another embodiment]
Next, another embodiment will be described.
(A) The specific form of the abnormality countermeasure process is not limited to the form exemplified in the above embodiment.
For example, even when an ignition command is commanded from the point fire extinguishing command unit 28, a mode in which a fire extinguishing maintenance process for maintaining the fire extinguishing state without igniting the burners 1a and 1c is executed, or the use of the stove is stopped by a notification means. It is possible to adopt a mode in which a stove stop information notification process for notifying the prompting information is performed.

(B) In the above embodiment, the combustion controller H monitors the measurement information of the placement state detector D and detects the heated object placement state even when the power switch 40 is in the OFF state. However, when the power switch 40 is in the OFF state, the measurement of the placement state duration time T1 is interrupted to turn off the power supply. You may comprise so that the above-mentioned mounting state continuation time T1 may be measured when switch 40 is an ON state.
In this case, when the memory provided in the combustion control unit H for storing the above-described installation state duration T1 is a volatile memory, the above-described installation state duration time even when the power switch 40 is OFF. In order to keep memorizing T1, the combustion control unit H is configured to give a power holding signal ON command to the power control unit 42 to continue supplying power to itself.

(C) The combustion control unit H may be provided with a nonvolatile memory.
In this case, when the power switch 40 is switched to the OFF state, the combustion control unit H gives an instruction to turn off the power holding signal to the power control unit 42 to stop the supply of power to itself, and the mounting state duration time. The measurement of T1 is interrupted, and then, when the power supply switch 40 is switched to the ON state, the placement state detection unit D stores the heated object placement state in the memory. The configuration is such that the measurement of the mounting state duration time T1 is resumed in the state of adding to the time.

(D) When the placement state detection unit D is configured to include the up and down movable unit 9b and the detection unit as in the above embodiment, the detection unit is not limited to the heated object detection switch 10. .
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.

  In addition, the specific configuration of the placement state detection unit D is not limited to the configuration including the vertically movable unit 9b and the detection unit as in the above embodiment. For example, reflective light configured to detect whether the object to be heated is placed or not to be placed based on whether the projection light is reflected by the presence or absence of the object to be heated on the placement unit Photointerrupter configured to detect whether the object to be heated is placed or not to be placed based on whether the projection light is blocked by the presence of the sensor or the object to be heated on the placement unit It is possible to configure with a type of optical sensor.

(E) The specific configuration of the notification means is not limited to the speaker 37 exemplified in the above embodiment.
For example, it may be configured by a display device that displays the guidance information, a buzzer, a lamp, or the like. Moreover, you may comprise using several of the speaker 37, a display apparatus, a buzzer, and a lamp | ramp.

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 supply structure of the electric power for operation to a combustion control part 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 6 Placement part 9b Vertically movable part 10 Detection part 28 Point-extinguishing command means 37 Notification means 40 Power switch 41 Power supply means D Placement state detection means H Control means

Claims (8)

The object to be heated is placed on the placement part for placing the object to be heated to be heated by the burner, and the object to be heated is not placed on the placement part. A stove provided with a mounting state detection means for detecting the mounting state,
Control means is provided for executing abnormality countermeasure processing when the placement state continuation time in which the object-to-be-heated object placement state is continuously detected by the placement state detection means reaches the placement state continuation abnormality determination setting time. The stove that has been. The control means, as the abnormality countermeasure processing,
When the previous placement state continuation time reaches the previous placement state continuation abnormality determination setting time, the notifying means informs the guide information for urging to raise the object to be heated from the previous placement portion, and after the guidance information is notified Until the set time for redetermination reaches the set time for redetermination, the placement state detecting means determines that the object to be heated is not placed and is normal, and the elapsed time reaches the set time for redetermination. 2. The abnormality determination process according to claim 1, wherein the placement state detection unit is configured to execute an abnormality determination process for determining an abnormality when the state of detecting the heated object placement state continues. Stove.   The control means performs the abnormality determination process as the abnormality countermeasure process when the setting state continuation time reaches the setting state continuation abnormality determination setting time, and the ignition command of the burner is issued by the point fire extinguishing command means. 3. A stove according to claim 2, configured to execute when commanded.   If it is determined that the control unit is normal in the abnormality determination process, the control unit causes the notification unit to notify the information indicating that the placement state detection unit is normal, and is abnormal in the abnormality determination process. The stove according to claim 2 or 3, wherein when determined, a re-abnormality countermeasure process is executed.   The control means is configured to execute a fire extinguishing state maintaining process for maintaining the burner in a fire extinguishing state as the re-abnormality countermeasure process even if the burner ignition command is commanded by the point fire extinguishing command means. The stove according to claim 4.   The control means is configured to execute a combustion suppression process for stopping combustion of the burner or reducing a combustion amount in the non-heated object placement state based on the detection information of the placement state detection means. The stove according to any one of claims 1 to 5.   When the power supply switch is switched from on to off, the control means detects power to the control means when the placement state detection means detects the heated object placement state. The power supply from the power supply means is continued, and the power supply from the power supply means is stopped when the placement state detection means detects the non-heated object placement state. The stove according to any one of claims 1 to 6, which is configured as described above. The above-mentioned installation state detection means is
From the placement state detection position for detecting the heated object placement state, which is pushed down as the bottom of the article to be heated placed on the placement portion comes into contact, and the placement state detection position An up-and-down movable part that is movable up and down over a non-mounted state detection position for detecting the non-mounted state of the object to be heated and that is urged to return to the non-mounted state detection position. ,
Detecting the state of the object to be heated by detecting a state in which the vertically movable portion is located at the placement state detection position, and a state in which the vertically movable portion is located at the non-placement state detection position. The stove according to any one of claims 1 to 7, further comprising a detection unit configured to detect the non-heated object non-loading state by detecting.

Images