JP2009270724A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker for discriminating whether a temperature detecting operation by a temperature detecting means is abnormal or not by effectively utilizing a boiling mode to the water as a heating object. <P>SOLUTION: This heating cooker is constituted to execute post-processing for terminating boiling when a boiling state is discriminated on the basis of a result of the detection by the temperature detecting means while the boiling mode is instructed, and the heating operation of the heating means is started. Whether the temperature detecting operation of the temperature detecting means is abnormal or not, is discriminated on the basis of that whether a detection value of the temperature detecting means is outside of a set temperature range or not, when a temperature equilibration state in which the detection value of the temperature detecting means is not changed in accompany with the lapse of time, or the variation of the detection value of the temperature detecting means in accompany with the lapse of time is small, is discriminated in the state that the boiling mode is instructed, and the heating operation of the heating means is started. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes a heating means for heating a cooking container located at a heating position, a temperature detection means for detecting the temperature of the cooking container located at the heating position, a control means for controlling operation, and a hot water mode. And a heating command means for instructing start and stop of the heating operation of the heating means, and the control means is configured to receive the heating means by a heating start command from the heating command means. A heating operation process for starting the heating operation of the heating means and stopping the heating operation of the heating means by a heating stop command by the heating command means, and a state where the hot water heating mode is commanded and the heating operation of the heating means is started In the cooking process, when it is determined that the boiling state is based on the detection result of the temperature detecting means, post-processing for finishing the boiling is performed. On.

  Such a heating cooker detects the temperature of the cooking container located at the heating position by the temperature detection means and heated by the heating means, and in the state where the hot water heating mode is commanded, the temperature detection means Based on the detected value, it is determined that the state is in a boiling state, and when boiling, post-processing for ending the hot water, for example, stopping the heating operation of the heating means or reducing the amount of heating, is performed. Although an excessive heating operation can be prevented, in such a heating cooker, various automatic cooking operations are performed in addition to the hot water mode using the detection value of the temperature detection means. It has become. For example, a fried food mode for performing fried foods such as tempura can be set, and when the fried food mode is commanded by the control means, the detection value of the temperature detecting means is within a preset target temperature range. There is one configured to control the heating operation of the heating means so as to fall within the range, and conventionally, the temperature detection means detects that the temperature of the cooking container is properly detected, and the detection information of the temperature detection means Based on the above, the heating operation of the heating means is controlled (for example, see Patent Document 1).

  By the way, although not described in the above-mentioned Patent Document 1, conventionally, for example, the detected value of the temperature detecting means is an abnormal value beyond the detection fluctuation range when the detected value is normal, and the temperature detecting means is disconnected. When a malfunction occurs due to a short circuit failure, it is determined by the control means and an abnormality is notified.

JP 2006-99777 A

  In the conventional configuration, when performing automatic cooking operation such as the hot water mode or the fried food mode, the temperature detection operation of the temperature detection means is normal, and the temperature of the cooking container is properly detected. Although it is possible to perform good control, for example, the detected value changes when the temperature of the cooking container changes rather than an abnormal state where the temperature detecting means causes a disconnection failure or a short-circuit failure. However, if the detected value is different from the actual temperature of the cooking container and the temperature detecting operation of the temperature detecting means is abnormal, there is a possibility that a proper automatic cooking operation cannot be performed.

  For example, in the hot water heating mode, when the temperature detection operation of the temperature detection means is abnormal, the water stored in the cooking container is actually boiled by being heated by the heating means. Although it is not determined that the water is in a boiling state, no post-processing is performed for the completion of the boiling, so excessive heating is performed or water actually stored in the cooking container is not boiling. Nevertheless, there is a possibility that inconveniences such as erroneous determination of the boiling state and termination of the heating operation may occur. In the fried food mode, the oil stored in the cooking container is not heated to a temperature suitable for fried food cooking and cooking is not performed well, or the oil is heated to a temperature higher than the target temperature. There is a risk of inconvenience such as being generated.

By the way, as a case where the temperature detection operation of the temperature detection means is abnormal, the following can be considered. That is, as the temperature detection means, a thermistor whose resistance value changes in accordance with a change in ambient temperature is often used. However, if the temperature detection means is configured using such a thermistor, the temperature detection part In the case where the overflowing boiled juice is deposited from the cooking container, there is a risk that a temperature lower than the actual temperature may be detected because there is dust deposited between the cooking container and the temperature detection site. is there. In addition, when a deposit such as boiled juice having a low resistance value is attached so as to short-circuit the pair of detection terminals of the temperature detection means, the resistance value of the thermistor as the temperature detection means corresponds to the detection temperature. And a temperature higher than the actual temperature may be detected. In addition to those caused by such deposits, the temperature detecting change characteristic of the temperature detecting means may change due to some factor.
Even when a detection sensor other than such a thermistor is used as the temperature detection means, there is a possibility that an abnormality in the temperature detection state may occur due to some factor.

  An object of the present invention is to provide a cooking device capable of determining whether or not the temperature detection operation of the temperature detection means is abnormal by effectively using a water heating mode in which water is a heating target. is there.

The heating cooker according to the present invention includes a heating means for heating the cooking container located at the heating position, a temperature detection means for detecting the temperature of the cooking container located at the heating position, and a control for controlling the operation. Means, a manually operated hot water mode command means for commanding the water heating mode, and a heating command means for commanding the start and stop of the heating operation of the heating means,
The control means is
A heating operation process in which a heating operation of the heating unit is started by a heating start command by the heating command unit and a heating operation of the heating unit is stopped by a heating stop command by the heating command unit; In the state where the heating operation of the heating means is started, when it is determined that the boiling state is based on the detection result of the temperature detecting means, post-processing for finishing the boiling is performed. The first characteristic configuration is
The control means is
In the state in which the hot water heating mode is commanded and the heating operation of the heating unit is started, the detection value of the temperature detection unit does not change with the passage of time or the change of the detection value of the temperature detection unit with the passage of time It is determined whether or not the temperature detection operation of the temperature detection means is abnormal based on whether or not the detection value of the temperature detection means is outside the set temperature range when it is determined that the temperature balance is small. The temperature detection state determination process is configured to execute.

  That is, the control means is based on a detection result of the temperature detection means in a state where the heating operation of the heating means is started by a heating start command by the heating command means in a state where the hot water heating mode is commanded. When it is determined that the water is in a boiling state, post-processing for finishing the boiling is performed. As the post-processing for termination, for example, when it is determined that the state is in a boiling state, the heating operation of the heating unit is immediately stopped, or the heating amount of the heating unit is decreased to be kept warm. A post-treatment for the boiling state will be performed.

  On the other hand, the control means executes the temperature detection state determination process separately from the process for determining the boiling state as described above. That is, in the state where the hot water heating mode is commanded and the cooking container is heated by the heating means, the detected value of the temperature detecting means does not change with the passage of time or the detected value of the temperature detecting means with the passage of time. It is determined whether or not the temperature detection operation of the temperature detection means is abnormal based on whether or not the detection value of the temperature detection means is outside the set temperature range when it is determined that the temperature equilibrium state has a small amount of change. .

  Since the object to be heated accommodated in the cooking container heated by the heating operation of the heating means instructed in this way is water, the temperature of the object to be heated when boiling is about 100 ° C. is there. Therefore, if the temperature detection operation of the temperature detection means is performed normally, the detected value of the temperature detection means when it is determined that the temperature is in the equilibrium state is a temperature close to about 100 ° C. Although there is no deviation, if the temperature detection operation of the temperature detection means is abnormal, the detection value of the temperature detection means when it is determined that the temperature is in the equilibrium state is a value far from 100 ° C. Therefore, it is determined whether or not the temperature detection operation of the temperature detection means is abnormal based on whether or not the detection value of the temperature detection means when it is determined that the temperature equilibrium state is out of the set temperature range. Can do it.

  Therefore, according to the first feature configuration, there is provided a heating cooker that can determine whether or not the temperature detection operation of the temperature detection means is abnormal by effectively using the water heating mode in which water is a heating target. I was able to provide it.

In addition to the first feature configuration, the second feature configuration of the present invention includes:
The control means is
When the number of times that the detection value of the temperature detection means in the temperature equilibrium state is in an abnormal temperature detection state outside the set temperature range exceeds the set number of times, the temperature detection operation of the temperature detection means Is configured so as to be determined to be abnormal.

  That is, when the number of times the control means determines that the detected value of the temperature detection means in the temperature equilibrium state is an abnormal temperature detection state outside the set temperature range exceeds the set number of times, the temperature detection means However, if the number of times that it is determined that the temperature detection operation is abnormal is less than the set number of times, it is not determined that the temperature detection operation of the temperature detection means is abnormal.

  For example, even if it is determined that there is an abnormal temperature detection state due to erroneous detection, the number of times that it is determined that it is in abnormal temperature detection state does not exceed the set number of times. It can be avoided that the temperature detection operation of the temperature detection means is abnormal, and when an abnormality actually occurs, the abnormal temperature detection state is repeatedly determined more than the set number of times. Therefore, it can be accurately determined that the temperature detection operation of the temperature detection means is abnormal.

  Therefore, according to the second characteristic configuration, it is possible to accurately determine that the temperature detection operation of the temperature detection means is abnormal.

In addition to the first feature configuration or the second feature configuration, the third feature configuration of the present invention includes:
The control means is
When the unprocessed state continuation integration time obtained by integrating the time during which the unprocessed state in which the temperature detection state determination process is not performed is exceeded exceeds an allowable time, the hot water mode command means and the heating command means by the hot water mode command means It is the point which is comprised so that the instruction | command promotion alerting | reporting process which prompts a user the start instruction | command of the heating operation by may be performed.

  That is, when the cooking device is used for a long time without executing the temperature detection state determination process, it is determined whether or not the temperature detection operation of the temperature detection means is abnormal. Since the temperature detection state determination process is not performed, when the unprocessed state continuation accumulated time obtained by integrating the time during which the unprocessed state continues exceeds a permissible time, a command promotion notification process is executed to execute the hot water mode command. Since the user is prompted with a command for the hot water heating mode by means and a start command for the heating operation by the heating command means, the user instructs the hot water mode to start the heating operation. As a result, since the control means executes the temperature detection state determination process, it can be determined that the temperature detection operation of the temperature detection means is abnormal.

  Therefore, according to the third characteristic configuration, it is possible to accurately determine whether or not the temperature detection operation of the temperature detection unit is abnormal regardless of the difference in the usage pattern by the user.

In addition to the third feature configuration, the fourth feature configuration of the present invention includes:
The control means is
When the elapsed time from the execution of the command promotion notification process to the execution of the temperature detection state determination process is integrated, and the integrated post-notification integrated time exceeds the set time for prohibition determination, the heating means It is in the point which is comprised so that it may switch to the heating prohibition state which prohibits the heating operation of this.

  That is, even if the control means executes the command promotion notification process to prompt the user to give a command for the hot water heating mode by the hot water mode command means and a start command for the heating operation by the heating command means. If the accumulated time after notification exceeds the set time for prohibition determination without being instructed, the heating means is switched to a heating prohibited state in which the heating operation is prohibited. Therefore, whether or not the temperature detecting operation of the temperature detecting means is abnormal. It is possible to avoid using the cooking device over a long period of time without performing the process of determining whether or not.

  Therefore, according to the fourth feature configuration, it is possible to avoid using the heating cooker for a long time without performing the process of determining whether or not the temperature detection operation of the temperature detection means is abnormal, It becomes possible to improve the safety in use.

In addition to the fourth feature configuration, the fifth feature configuration of the present invention includes:
A simple operation type reset command means for commanding a reset command for maintenance is provided,
If the control means has a reset command by the simple operation type reset command means after switching to the heating prohibited state, it is configured to release the heating prohibited state for a set time for prohibition release. is there.

  That is, the control means cancels the heating prohibited state only for the set time for prohibition release if there is a maintenance reset command by the simple operation type reset command means after switching to the heating prohibited state. By performing the temperature detection state determination process after an operator issues a maintenance reset command by the simple operation type reset command means and before the set time for prohibition release elapses, It can be determined whether or not the temperature detection operation is abnormal.

  Therefore, according to the fifth characteristic configuration, it is possible to easily determine whether or not the temperature detection operation of the temperature detection unit is abnormal by operating the simple operation type reset command unit with a simple operation. If it is abnormal, it is possible to perform appropriate maintenance work such as repair and replacement, etc., and if it is determined that it is normal and not abnormal, it will not perform unnecessary repair replacement, etc. Maintenance work can be performed with good workability.

In addition to the fifth feature configuration, the sixth feature configuration of the present invention includes:
A complex operation type reset command means for commanding a reset command for maintenance by an operation more complicated than the operation in the simple operation type reset means;
The control unit is configured to reset the unprocessed state continuous integration time and the post-notification integration time if there is a reset command by the complex operation type reset command unit after switching to the heating prohibited state. It is in the point.

  That is, the control unit resets the unprocessed state continuous integration time and the post-notification integration time if there is a maintenance reset command by the complex operation type reset command unit after switching to the heating prohibited state. For maintenance by a complex operation type reset command means, which is more complicated than the operation of the simple operation type reset means after the maintenance worker performs a repair or replacement of the temperature detection means as a maintenance work. By instructing the reset command, the unprocessed state continuous integration time and the post-notification integration time are reset, and thereafter the cooking device can be used in a normal state.

  By issuing a reset command with a complicated operation as described above, there is no risk of resetting in a state where appropriate maintenance work such as repair and replacement has not been performed, and appropriate maintenance work has been performed. It can be reset later.

  Therefore, according to the sixth feature configuration, when the temperature detection means is properly repaired or replaced, it is possible to perform appropriate maintenance work, thereby further improving safety. Is possible.

Hereinafter, an embodiment of a heating cooker according to the present invention will be described based on the drawings.
As shown in FIG. 1, the gas stove as the heating cooker is constituted by a built-in type gas stove provided with a grill portion 3 having three stove burners 1a, 1b, 1c and a grill burner 2 (see FIG. 2). The three stove burners 1a, 1b, and 1c are configured by a standard burner 1a, a small burner 1b, and a high thermal power burner 1c.

  Also, 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. Corresponding to each of 1b and 1c, five virtues 6 are provided as placement parts for placing cooking containers (such as pans) heated by each. On the back side of the top plate 5, a top surface display unit 70 is provided so as to be visible through the top plate 5. The top surface display unit 70 displays the heating power of each of the stove burners 1 a, 1 b, 1 c and the point fire extinguishing state of the grill burner 2. Yes.

  The top surface display unit 70 includes three top surface thermal power display units 71 corresponding to the respective stove burners 1a, 1b, and 1c, and a grill combustion display unit 73 corresponding to the grill burner 2, and the top surface thermal power unit. The display unit 71 is configured to light up and display a number of LED lamps corresponding to the amount of combustion (thermal power) using a plurality of LED lamps as a level meter. The grill combustion display unit 73 is composed of one LED lamp, and when the grill burner 2 is ignited, the LED lamp is turned on.

  As shown in FIG. 1, a manual operation unit S that commands ignition and extinguishing of each of the stove burners 1 a, 1 b, 1 c and the grill burner 2, heating power adjustment, and various settings is provided on the front side of the gas stove. As shown in FIG. 1, each of the burners 1a, 1b, 1c, 2 is based on the operation state instructed by the manual operation unit S by the operation control unit H provided with a microcomputer and configured to execute various controls. Is configured to control.

  As shown in FIG. 2, each of the stove burners 1a, 1b, and 1c is provided with a spark plug 7 and a thermocouple 8 for detecting an ignition state. The grill burner 2 includes an upper surface burner 2a and a pair of left and right lower surface burners. 2b and 2c. The upper surface burner 2a and the pair of left and right lower surface burners 2b and 2c are each provided with a spark plug 7 and a thermocouple 8 for detecting the ignition state. Yes.

  Moreover, as shown in FIG.2 and FIG.3 (however, it shows about the standard burner 1a in FIG. 3), the bottom part of the cooking container mounted in Gotoku 6 is shown in each of each stove burner 1a, 1b, 1c. An expansion / contraction mechanism 9 provided with a vertically movable portion 9b that is movable up and down between a lowered position that is pushed down by contact and a raised position that is located above the lowered position, and that is urged to return to the raised position. Is provided.

  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. When the cooking container is not placed on the virtues 6, the vertically movable portion 9 b is in a state in which the upper end protrudes from the upper end portion receiving the cooking containers in the virtues 6 by the return biasing force. It will be in the extended state which returns to the rising position. Further, as the cooking container is placed on the virtues 6, the vertically movable portion 9b is pushed down by the bottom of the cooking container to be in a contracted state positioned at the lowered position.

As shown in FIG. 2, the upper and lower movable parts 9b of the expansion / contraction mechanism 9 corresponding to each of the stove burners 1a, 1b and 1c have cooking containers positioned at the heating positions, that is, on the virtues 6 A temperature sensor 11 comprising a thermistor as temperature detecting means for detecting the temperature of the placed cooking container is provided, and the temperature sensor 11 is in a state where the bottom of the cooking container is in contact with the upper end of the vertically movable portion 9b. Thus, the temperature of the cooking container is detected. The temperature sensor 11 is composed of a thermistor whose resistance value changes according to a change in temperature.
At the lower end of the telescopic mechanism 9, there is also provided a detection switch 10 that switches to the on state when it is in the lowered position.

  The gas supply structure to each of the stove burners 1a, 1b, 1c and the grill burner 2 will be described. As shown in FIG. 2, an original gas solenoid valve 13 is provided in the original gas supply path 12, and this original gas supply From the road 12, the branch path 14a for the standard burner, the branch path 14b for the small burner, the branch path 14c for the high-power burner, and the branch path 14d for the grill burner 14d are branched, and the branch path 14d for the grill burner to the grill burner 2 is Furthermore, a branch path for the upper surface burner and a branch path for the lower surface burner are branched, and a bypass path 17 having a flow path 15 with an orifice of and an open / close solenoid valve 16 is provided in each of the branch paths. ing. In each of the standard burner branch path 14a, the small burner branch path 14b, the high-heat-power burner branch path 14c, and the grill burner branch path 14d, the amount of gas is adjusted and the combustion amount (thermal power) of each burner is adjusted. ) Is provided.

  On the front side of the gas stove, a point fire extinguishing command unit 28, a burner 1a, which can be switched between an ignition command state instructing an ignition command and a fire extinguishing command state instructing a fire extinguishing command corresponding to each of the stove burners 1a, 1b, 1c. 1b, 1c is provided with an artificially operated combustion amount adjusting operation unit 29 for instructing a combustion amount (thermal power) as a heating amount, a setting input panel 50 for instructing cooking setting, and for the grill burner 2 A setting input panel 60 for commanding ignition and extinguishing and combustion amount is provided. The setting input panel 50 and the setting input panel 60 are of an open / close type, and the setting input panel 60 is provided with a point fire switch (not shown) for instructing the grill burner 2 to ignite and extinguish.

  Although not described in detail, the point fire extinguishing command unit 28 is provided with a cylindrical rotation operation unit 31 that can be held and retracted at each position between the push-in position and the protruding position, and provided inside when switched to the protruding position. The fire extinguishing switch 32 (refer to FIG. 2) is turned on to enter an ignition command state for commanding ignition, and when switched to the push-in position, the fire extinguishing switch 32 is turned off to enter a fire extinguishing command state for commanding fire extinguishing. ing. Further, the combustion amount adjustment operation unit 29 is configured to adjust the change in the burner combustion amount by rotating the rotation operation unit 31 at the protruding position. Incidentally, each of the standard burner 1a and the high thermal power burner 1c is configured so that its combustion amount can be adjusted to a five-stage set combustion amount, and the small burner 1c has its combustion amount set to a three-stage set combustion amount. It is configured to be adjustable.

  Then, the operation control unit H ignites corresponding ones of the burners based on the ignition command of the point extinguishing switch 32, extinguishes the corresponding burners based on the extinguishing command of the point extinguishing switch 32, and adjusts the combustion amount. The operation of the corresponding burner is controlled so that the combustion amount commanded by the operation unit 29 is obtained.

  Further, as shown in FIG. 2, a speaker 37 is provided as a notifying means for notifying various information by voice, and the operation control unit H is configured to notify the various information by the speaker 37. . The setting panel 50 corresponding to each of the stove burners 1a, 1b, 1c displays a hot water mode switch 51 as a hot water mode command means for instructing a hot water mode, a deep-fried food mode switch 52 for instructing a deep-fried food mode, and various information. A display panel 54 and the like are provided.

  In the deep-fried food mode, heating is performed by the corresponding burner at the combustion amount commanded by the combustion amount adjusting operation unit 29 until the detected value of the temperature sensor 11 rises to a preset set temperature, and thereafter, the temperature sensor 11 so that the combustion amount of the burner is alternately switched between the combustion amount commanded by the combustion amount adjusting operation section 29 and the combustion amount corresponding to the minimum heating power so that the detected value of 11 is maintained within the target temperature range. The operation state of the corresponding burner is controlled, and the fried food combustion control for extinguishing the burner based on the fire extinguishing command of the point fire extinguishing switch 32 is executed.

  In the hot water heating mode, when it is determined that the water is in a boiling state based on the detection result of the temperature sensor 11, post-processing for completing the hot water heating is executed. Then, as a post-treatment for finishing the boiling of water, the burner corresponding to the set time for keeping warm (for example, 5 minutes) is extinguished after maintaining combustion with the heat for keeping warm, or immediately after determining the boiling state. The burner to fire is extinguished, and the user can select one. In other words, the hot water heating mode includes a hot water warming mode that extinguishes after maintaining the combustion of the burner with the thermal power for the warming for a set time for warming, and a hot water automatic fire extinguishing mode that extinguishes the burner immediately after determining the boiling state. Each time the hot water mode switch 51 is pressed, each mode is instructed alternately, and the instructed mode is displayed on the display panel 54.

  Therefore, in this embodiment, each of the burners 1a, 1b, 1c corresponds to the heating means A for heating the cooking container located at the heating position, and the fire extinguishing switch 32 corresponds to the heating command means, Using the operation control unit H, combustion control processing as heating operation processing that starts the heating operation of the burner by a heating start command by the point fire extinguishing switch 32 and stops the heating operation of the burner by a heating stop command by the point fire extinguishing switch 32 And, when it is determined that the boiling state is based on the detection result of the temperature sensor 11, there is configured a control means for executing post-processing for ending the boiling.

  Then, the operation control unit H does not change the detected value of the temperature sensor 11 with the passage of time or the temperature sensor 11 with the passage of time in a state where the hot water mode is commanded and the heating operation of the burner is started. Whether or not the temperature detection operation of the temperature sensor 11 is abnormal based on whether or not the detection value of the temperature sensor 11 is outside the set temperature range when it is determined that the temperature equilibrium state has a small change amount of the detection value. It is configured to execute a temperature detection state determination process for determining the above. Specifically, when the number of times that the detected value of the temperature sensor 11 in the temperature equilibrium state is in the abnormal temperature detection state outside the set temperature range exceeds the set number, the temperature sensor 11 It is configured to determine that the temperature detection operation is abnormal.

  When the unprocessed state continuation integration time TM1 obtained by integrating the time during which the unprocessed state in which the temperature detection state determination process is not performed is integrated exceeds the allowable time TS1, the operation control unit H performs the boiling by the water heating mode switch 51. It is configured to execute a command promotion notification process that prompts the user to issue a mode command and a burner heating start command by the point fire switch 32. Further, the elapsed time from the execution of the command promotion notification process to the execution of the temperature detection state determination process is integrated, and the integrated post-notification integrated time TM2 exceeds the prohibition determination set time TS2. And a heating prohibition state in which the heating operation of the burner is prohibited.

  A reset switch RS is provided as a simple operation type reset command means for instructing a reset command for maintenance. If the operation control unit H switches to the heating prohibited state, there is a reset command by the reset switch RS. The heating prohibition state is canceled only for the prohibition cancellation setting time (for example, 20 minutes). In addition, an external operation device GS prepared by a maintenance worker is provided as a complex operation type reset command means for commanding a reset command for maintenance by a more complicated operation than the operation at the reset switch RS. If there is a reset command from the external operating device GS after switching to the heating prohibited state, the unprocessed state continuous integration time TM1 and the post-notification integration time TM2 are reset. The external operation device GS is configured by, for example, a personal computer provided with maintenance control software.

  The reset switch RS is not operated by an ordinary user of the stove, but is operated by a maintenance worker, and is a circuit board (equipped with various electrical components housed below the top plate 5 of the stove). (Not shown). Also, the external operation device GS is not operated by a general user of the stove, but is connected to a connector (not shown) on the circuit board via a connection line, and a password preset in the external operation device GS is set. By inputting, a reset command for maintenance is commanded.

Next, the control of the operation control unit H will be described.
Note that the control according to the present invention is executed for the three burners 1a, 1b, and 1c, but the control operation of the operation control unit H for the burners 1a, 1b, and 1c is the same. In the following description, the control operation targeting the standard burner 1a will be described, and the description of the control operation targeting other burners will be omitted.
The original gas solenoid valve 13 is opened when a point fire switch 32 corresponding to at least one of the point fire switches 32 corresponding to each of the burners 1a, 1b, 1c, 2 is ON. When all of the fire extinguishing switches 32 corresponding to the burners 1a, 1b, 1c, and 2 are all in the OFF state, the valve is maintained in the closed state. Therefore, in the following explanation, the control of the original gas solenoid valve 13 is described. Description is omitted.

  The operation control unit H opens the flow control valve 18 so that when the point fire switch 32 is switched from the OFF state to the ON state and an ignition command is issued, the heating power of the standard burner 1a becomes the set heating power for ignition. The ignition process is executed by applying a drive signal to the spark plug 7 to cause the ignition operation. Incidentally, the set thermal power for ignition is set to the maximum thermal power among the five stages of thermal power for the standard burner 1a. The operation control unit H can control the flow rate control valve so that the thermal power commanded by the combustion amount adjusting operation unit 29 is obtained after the ignition process regardless of whether the hot water heating mode is commanded or not. It is comprised so that the opening degree of 18 may be adjusted, and it becomes the structure which can adjust arbitrary thermal power by a user.

The hot water mode will be described.
The operation control unit H determines the boiling state based on the detection information of the temperature sensor 11 in the hot water boiling mode. Referring to FIG. 4, the process for determining the boiling will be described. Since the standard burner 1a is ignited and combusted, the temperature sensor 11 is used as shown by the solid line L1 in FIG. The temperature of the detected cooking container gradually rises, but rises to the measurement end temperature T2 (90 ° C.) from the time when the detection value of the temperature sensor 11 rises to the measurement start temperature T1 (85 ° C.). The temperature rise time tm, which is the elapsed time until, is obtained, and the temperature rise time tm is multiplied by a predetermined coefficient to obtain the boiling determination time tb. Thereafter, when the time required for the detection value of the temperature sensor 11 to rise by 1 ° C. is equal to or longer than the boiling determination time tb, the boiling state is determined.

The control operation of the operation control unit H will be described below based on the flowcharts shown in FIGS.
When the point-off switch 32 is switched from the OFF state to the ON state and an ignition command is commanded, the operation control unit H ignites the standard burner 1a unless it is set to a combustion inhibition mode as described later. Ignition processing is executed (steps 1, 2, and 3). When the ignition process ends, the prohibition release setting time (20 minutes) is set after the ignition prohibition temporary release mode, which will be described later, is set or even when the combustion prohibition temporary release mode is set. ) Has not elapsed, the opening degree of the flow control valve 18 is adjusted so that the combustion amount of the standard burner 1a becomes the combustion amount commanded by the combustion amount adjusting operation unit 29 (steps 4, 5, 10). .

  If the unprocessed state continuation integration time TM1 obtained by adding up the time during which the unprocessed state in which the temperature detection state determination process as described later is not performed is integrated does not exceed the allowable time TS1, and if it is not the water heating mode at that time, the fire is extinguished. The combustion amount of the standard burner 1a is maintained at the combustion amount commanded by the combustion amount adjusting operation unit 29 until the command is commanded. When the fire extinguishing command is commanded, the flow control valve 18 is closed and standardized. A fire extinguishing process for stopping the combustion of the burner 1a is executed (steps 6, 7, 8, 9).

  When the deep-fried food switch 52 is operated and the deep-fried food mode is set, the above-described deep-fried food combustion control is executed (6-1, 6-2). That is, until the detected value of the temperature sensor 11 rises to a preset target temperature, the heating operation by the standard burner 1a corresponding to the combustion amount commanded by the combustion amount adjusting operation unit 29 is executed. The temperature sensor is configured to alternately switch the combustion amount of the burner 1a between a combustion amount commanded by the combustion amount adjusting operation unit 29 and a combustion amount corresponding to a small heating power (for example, the minimum heating power among the five stages of heating power). The opening degree of the flow control valve 18 is adjusted so as to adjust the combustion amount of the standard burner 1a so that the detected value of 11 is maintained within the set temperature range set corresponding to the target temperature. If there is a fire extinguishing command for the point fire extinguishing switch 32, a fire extinguishing process for extinguishing the standard burner 1a is executed.

  When the water heating mode switch 51 is operated and the water heating mode is set, the following processing is executed. That is, the temperature rise time tm, which is the elapsed time from when the detected value of the temperature sensor 11 rises to the measurement start temperature T1 (85 ° C.) to rise to the measurement end temperature T2 (90 ° C.), is measured. (Steps 20, 21). When the measurement of the temperature rise time is completed, a boiling condition setting process for obtaining the boiling determination time tb by multiplying the temperature rise time tm by a predetermined coefficient is executed (step 22).

  If the setting of the equilibrium temperature Th is not completed regardless of whether or not the measurement of the temperature rise time tm as described above is completed, a temperature equilibrium determination process is executed (steps 23 and 24). The temperature equilibrium determination process will be described. When the set time (15 seconds) elapses, the detected value of the temperature sensor is read, and each time the detected value is read, the difference from the previous detected value, that is, the set time is read. A fluctuation range discriminating process is performed for discriminating whether or not the fluctuation range of the detected value is within a range of ± 3 ° C. during the elapsed time. In addition, the fluctuation range determination process is repeated 10 times, and the number of times that the fluctuation range of the detected value is determined to be within the range of ± 3 ° C. among the 10 fluctuation range determination processes is 8 times or more. If it is, it is determined that the temperature is in an equilibrium state, and if the number of times that the variation range of the detected value is within ± 3 ° C. is less than seven, it is determined that the temperature is not in an equilibrium state.

  After that, if it is determined that the time required for the detection value of the temperature sensor 11 to rise by 1 ° C is equal to or longer than the boiling determination time tb and is in the boiling state, the detection value Tx of the temperature sensor 11 at that time is balanced. The temperature Th is set (steps 25 and 26), and when the hot water automatic fire extinguishing mode is selected, the flow control valve 18 is immediately closed to execute the fire extinguishing process for stopping the combustion of the standard burner 1a (step 27). 33). When the hot water heat-retaining mode is selected, the standard burner 1a is adjusted to adjust the opening degree of the flow rate control valve 18 during the heat-retaining setting time (about 5 minutes), and the standard burner 1a After the combustion is continued at the minimum thermal power), a fire extinguishing process for closing the flow rate control valve 18 and stopping the combustion of the standard burner 1a is executed (steps 28, 29, 33).

  The time required for the detection value of the temperature sensor 11 to rise by 1 ° C. is not equal to or longer than the boiling determination time tb, and the boiling state is not determined. If determined, the detected value Tx of the temperature sensor 11 at that time is set as the equilibrium temperature Th (steps 30 and 31). Incidentally, it is determined that the temperature equilibrium state is determined even though the boiling state is not determined in this way, as indicated by a virtual line L2 in FIG. Since the temperature equilibrium state is reached in a state where the temperature T1 and the measurement end temperature T2 are not increased, there is a possibility that the temperature sensor 11 has an abnormality in the temperature detection state.

  When the point-extinguishing switch 32 is switched from the ON state to the OFF state and a fire extinguishing command is issued, a fire extinguishing process is executed (steps 32 and 33). If the equilibrium temperature Th is set regardless of the presence or absence of the fire extinguishing process, Then, it is determined whether or not the equilibrium temperature Th is in an abnormal temperature detection state where it is out of the set temperature range (125 ° C. to 75 ° C.). That is, when the equilibrium temperature Th is 125 ° C. or higher and when the equilibrium temperature Th is lower than 75 ° C., the abnormality occurrence counter is counted up (steps 34 to 37). If the count value Nx of the abnormality occurrence counter is equal to or greater than the set number Ns (for example, 3 times), it is determined that the temperature detection operation of the temperature sensor 11 is abnormal, and abnormality alarm processing is executed (step 39). Then, the combustion mode of the standard burner 1a is switched to the combustion inhibition mode (step 40).

  The abnormality alarm process generates a sound “Temperature sensor is abnormal” through the speaker 37 to notify the user that the temperature detection state by the temperature sensor 11 is abnormal. Further, in addition to the voice notification, or instead of the voice notification, an abnormal display such as blinking a plurality of LED lamps provided in the top heat display 71 corresponding to the standard burner 1a may be performed. Good. In addition, after switching to the combustion inhibition mode, the ignition process is not executed even if there is an ignition command from the fire extinguishing switch 32 until a reset command by the reset switch RS or a reset command by the external operating device GS is commanded ( Steps 1, 2, 16, 18).

  Then, when it is detected that the equilibrium temperature Th is within the set temperature range (75 ° C. to 125 ° C.), the temperature detection operation by the temperature sensor 11 is normally performed at that time. The count value Nx of the counter is reset (step 41), and the unprocessed state continuous integration time TM1 and the post-notification integration time TM2 described later are reset (step 42).

  The process for determining an abnormality depending on whether or not the equilibrium temperature Th is in an abnormal temperature detection state where the equilibrium temperature Th is out of the set temperature range corresponds to the temperature detection state determination process. The time during which the unprocessed state in which the temperature detection state determination process is not performed is continued is accumulated, and the accumulated unprocessed state continued integration time TM1 is counted up (step 43).

  If the unprocessed state continuation integration time TM1 exceeds an allowable time TS1 (for example, 200 hours) without executing the temperature detection state determination process, a hot water mode command and a fire extinguishing by the hot water mode switch 51 are then performed. A command promotion notification process for prompting the user to start a heating operation by the switch 32 is executed (step 12). Specifically, the speaker 37 notifies that “please detect boiling in the hot water mode”.

  The elapsed time from the execution of the command promotion notification process to the execution of the temperature detection state determination process is integrated, and the integrated post-notification integrated time TM2 is set to the prohibition determination set time TS2 (for example, 78 When the time is exceeded, the mode is switched to a combustion inhibition mode as a heating inhibition state in which the combustion operation of the standard burner 1a is inhibited (steps 13, 14, and 15). After switching to this combustion inhibition mode, the ignition process is not executed even if there is an ignition command from the fire extinguishing switch 32 until a reset command by the reset switch RS or a reset command by the external operating device GS is commanded (step 16). , 18, 1, 2).

  When a reset command is issued by the reset switch RS after switching to the combustion inhibition mode, the mode is switched to the combustion inhibition temporary release mode (steps 16 and 17). After switching to this combustion prohibition temporary release mode, if there is an ignition command by the point fire extinguishing switch 32, ignition processing is executed, but the prohibition release setting time (for example, 20 minutes) has elapsed since switching to the combustion prohibition temporary release mode. After that, after executing the fire extinguishing process, the mode returns to the combustion inhibition mode (steps 10 and 11).

  After switching to the combustion inhibition mode, the external operation device GS is connected to a connector on the circuit board via a connection line, and a password preset in the external operation device GS is input for maintenance. When the reset command is issued, the unprocessed state continuous integration time TM1 and the post-notification integration time TM2 are reset (steps 18 and 19), respectively. Further, as described above, when it is detected in the temperature detection state determination process that the equilibrium temperature Th is within the set temperature range (75 ° C. to 125 ° C.), the unprocessed state continuous integration time TM1 and The post-notification integration time TM2 is reset (step 42).

  Therefore, when the temperature detection state of the temperature sensor 11 is normal, the unprocessed state continuation integration time TM1 and the post-notification integration time TM2 are reset and returned to the initial state. When an abnormality in the temperature detection state is detected, if a maintenance operation such as repair or replacement is performed and a reset command is issued by the external operation device GS, the unprocessed state continuous integration time TM1 and the post-notification The accumulated time TM2 is reset to return to the initial state.

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) In the above-described embodiment, the heating means immediately stops heating or set time as post-processing for ending the boiling, which is executed when it is determined that the boiling state is based on the detection result of the temperature detecting means. Although the configuration in which heating of the heating unit is stopped after heating with a combustion amount for heat retention during the period is exemplified, the present invention is not limited to such a configuration, and for example, processing for notifying the boiling state by the notification unit is performed. It can be implemented in various configurations, such as a configuration, or the fact that a boiling state is transmitted to a management center that centrally manages a plurality of heating cookers via a communication line.

(2) In the above embodiment, the command promotion notification process is executed when the unprocessed state continuation accumulated time obtained by integrating the time during which the unprocessed state in which the temperature detection state determination process is not performed is exceeded exceeds the allowable time. However, it is good also as a structure which performs the said instruction | command promotion alerting | reporting process repeatedly whenever setting interval time passes.

(3) In the above embodiment, the elapsed time from the execution of the command promotion notification process to the execution of the temperature detection state determination process is integrated, and the integrated post-notification integrated time is for prohibition determination. Although it is configured to switch to the heating prohibited state when the set time is exceeded, a configuration in which such processing is not performed may be employed.

(4) In the above embodiment, when the boiling state is determined based on the detection result of the temperature detection means, the detection value of the temperature detection means at that time is set as the equilibrium temperature. Regardless of the determination of the boiling state as the state determination process, the temperature detection unit of the temperature detection unit based on the detection value of the temperature detection unit when it is determined that the temperature equilibrium state is determined in the temperature equilibrium determination process. It may be configured to determine whether or not the temperature detection operation is abnormal.

(5) In the above embodiment, the number of times that the detection value of the temperature detection means in the temperature equilibrium state is determined to be an abnormal temperature detection state outside the set temperature range is set to 3 times. If it exceeds, the temperature detection operation of the temperature detection means is determined to be abnormal. However, the set number of times may be 4 or more instead of 3, and the abnormal temperature detection state. If the number of times of determining is one or more, it may be determined that the temperature detecting operation of the temperature detecting means is abnormal.
Further, the determination process of the temperature equilibrium state is not limited to the determination process exemplified in the above embodiment, for example, the change amount of the detection value of the temperature detection means for each set unit time is sequentially detected, When the amount of change falls below a set value, various determination methods can be used, such as determining that the state is in an equilibrium state.

(6) In the above-described embodiment, the simple operation type reset command means for commanding the maintenance reset command and the complex operation type reset command means are provided, but only one of them is provided. It is good also as a structure, and it is good also as a structure which is not provided with each reset instruction | indication means.

(7) In the above embodiment, the configuration including the deep-fried food mode other than the hot water mode as the cooking control mode based on the detection information of the temperature detecting means has been described. However, instead of or in addition to such a deep-fried food mode, Configuration that can be set to other cooking modes, for example, cooking control mode for controlling the heating operation of the heating means so as to be preset heating conditions according to cooking contents such as stewed cooking or fried cooking using oil It may be a thing.

(8) In the above embodiment, a speaker is provided as an informing unit and is informed by voice. However, as the informing unit, different information can be informed by the number of outgoing sounds by a buzzer, or a display dedicated to abnormality notification The present invention can be implemented in various configurations, such as a configuration in which a lamp is turned on to notify.

(9) In the above embodiment, a gas stove using a burner that uses gas as fuel as a heating cooker has been described. However, the heating cooker uses an electric heater, an electromagnetic induction heating means, or the like as a heating means. Also good.

Perspective view of stove Block diagram showing control configuration Longitudinal section around the burner Water heater mode time chart Flow chart of control operation Flow chart of control operation Flow chart of control operation

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Temperature detection means 32 Heating instruction means 51 Water heating mode instruction means A Heating means H Control means GS Complex operation type reset command means RS Simple operation type reset command means TM1 Unprocessed state continuation integration time TM2 Notification integration time TS1 Allowable time TS2 Set time for prohibition judgment

Claims (6)

A heating means for heating the cooking container located at the heating position, a temperature detection means for detecting the temperature of the cooking container located at the heating position, a control means for controlling the operation, and a manual for instructing the hot water mode An operation type water heating mode command means, and a heating command means for commanding the start and stop of the heating operation of the heating means,
The control means is
A heating operation process in which a heating operation of the heating unit is started by a heating start command by the heating command unit and a heating operation of the heating unit is stopped by a heating stop command by the heating command unit; When the heating operation of the heating means is started, the cooking device is configured to execute post-processing for finishing boiling when it is determined that the boiling state is based on the detection result of the temperature detection means Because
The control means is
In the state in which the hot water heating mode is commanded and the heating operation of the heating unit is started, the detection value of the temperature detection unit does not change with the passage of time or the change of the detection value of the temperature detection unit with the passage of time It is determined whether or not the temperature detection operation of the temperature detection means is abnormal based on whether or not the detection value of the temperature detection means is outside the set temperature range when it is determined that the temperature balance is small. A cooking device configured to execute a temperature detection state determination process. The control means is
When the number of times that the detection value of the temperature detection means in the temperature equilibrium state is in an abnormal temperature detection state outside the set temperature range exceeds the set number of times, the temperature detection operation of the temperature detection means The cooking device according to claim 1, wherein the cooking device is configured to discriminate that is abnormal. The control means is
When the unprocessed state continuation integration time obtained by integrating the time during which the unprocessed state in which the temperature detection state determination process is not performed is exceeded exceeds an allowable time, the hot water mode command means and the heating command means by the hot water mode command means The cooking device according to claim 1 or 2, wherein command heating notification processing for prompting a user to start a heating operation is performed. The control means is
When the elapsed time from the execution of the command promotion notification process to the execution of the temperature detection state determination process is integrated, and the integrated post-notification integrated time exceeds the set time for prohibition determination, the heating means The cooking device according to claim 3, wherein the cooking device is configured to switch to a heating prohibited state in which the heating operation is prohibited. A simple operation type reset command means for commanding a reset command for maintenance is provided,
The control means is configured to cancel the heating prohibition state for a set time for prohibition release if there is a reset command by the simple operation type reset command means after switching to the heating prohibition state. 4. The cooking device according to 4. A complex operation type reset command means for commanding a reset command for maintenance by an operation more complicated than the operation in the simple operation type reset means;
The control unit is configured to reset the unprocessed state continuous integration time and the post-notification integration time if there is a reset command by the complex operation type reset command unit after switching to the heating prohibited state. The cooking device according to claim 5.

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