JP2008138912A - Cooking stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooking stove capable of discriminating whether abnormality exists or not, with respect to the cooking stove comprising a placement state detecting means and an outside diameter detecting means. <P>SOLUTION: This cooking stove comprises the placement state detecting means 21 for detecting whether a heated object N is placed on a trivet 2 or not, the outside diameter detecting means K for detecting an outside diameter of the heated object N, and an operation control means 101 for controlling a combustion state of a burner 3 on the basis of the detection information of the placement state detecting means 21 and the outside diameter detecting means K. The outside diameter detecting means K comprises a heated object existence detecting means for detecting whether the heated object N exists or not, and an outside diameter discriminating means 101 for discriminating a size of an outside diameter of the heated object N on the basis of the detection information, and the operation control means 101 discriminates an abnormal state when the placement state detecting means 21 detects that the heated object N is not placed on the trivet 2, and the heated object existence detecting means of the outside diameter detecting means K detects the existence of the heated object N. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention provides a burner for heating an object to be heated placed on the virtues, a placement state detecting means for detecting whether the object to be heated is placed on the virtues, and an outer diameter of the object to be heated. An outer diameter detecting means for detecting, and an operation control means for controlling the operation,
The outer diameter detecting means detects the presence / absence of a heated object to detect the existence area of the heated object placed on the five virtues, and detection information of the heated object presence / absence detecting means And an outer diameter discriminating means for discriminating the size of the outer diameter of the object to be heated.
The operation control means relates to a stove configured to control a combustion state of the burner based on detection information of the placement state detection means and the outer diameter detection means.

  In the above-described stove, conventionally, the presence / absence of the object to be heated in the outer diameter detecting means has the presence / absence of the object to be heated at each of a plurality of positions different from each other in the radial direction of the object to be heated placed on the five virtues. Each of the plurality of detection units is configured to detect the presence or absence of an object to be heated at each of the plurality of positions, and based on the detection result, It is configured to determine the size of the outer diameter, and the mounting state detection means is provided in a state of being positioned at the center of the burner, and is configured to detect the presence or absence of an object to be heated ( For example, see Patent Document 1.)

  In other words, a plurality of detection units constituting the heated object presence / absence detection means are provided in a state of being located on the lower side of the top plate, and light is transmitted upward through a light transmission window formed on the top plate. It is composed of an optical sensor that detects reflected light that is irradiated and reflected at the bottom of the object to be heated, and the plurality of optical sensors are double concentric circles with the central portion of the burner as a central position in plan view. A total of eight are arranged and arranged in a state where four are arranged at intervals of about 90 degrees in the circumferential direction.

  The outer diameter discriminating means discriminates that three or more of the four optical sensors located on the outer peripheral side have a large diameter when detecting the presence of the object to be heated, and is positioned on the inner peripheral side. When three or more of the four optical sensors detect the presence of the object to be heated, the medium diameter is detected, and the presence of the object to be heated is detected among the four optical sensors located on the inner peripheral side. If the number of objects is two or less, it is determined that the diameter is small, and the operation control means is a combustion corresponding to the size of the outer diameter of the heated object detected based on the detection result of the outer diameter detection means. The combustion amount of the burner is automatically adjusted so that the amount becomes the same.

  The placement state detection means, like the outer diameter detection means, is composed of an optical sensor that irradiates light upward and detects reflected light reflected from the bottom of the object to be heated. When the presence of the object to be heated is detected by the mounting state detecting means, the operation control means performs the ignition process if there is an ignition command for the burner, but the presence of the object to be heated is not detected. Is configured such that the ignition process is not performed even when the ignition to the burner is commanded.

JP 2006-242481 A

  As described above, the outer diameter detecting means detects the presence or absence of the heated object by the heated object presence / absence detecting means, and determines the outer diameter of the heated object based on the detection result. However, although the heated object presence / absence detecting means fails or the heated object presence / absence detecting means detects the presence of another object different from the measured object, the measured object does not exist, It may be erroneously detected that the object to be measured exists.

  If the optical sensor is used as the detection unit in the heated object presence / absence detecting means as in the conventional configuration, for example, the light transmission window corresponding to any one of the optical sensors is contaminated with the food being scattered, Or, due to the presence of other cooking utensils other than the object to be heated, the optical sensor may erroneously detect that the object to be measured exists even though the object to be heated does not exist There is.

  As described above, when the object to be heated presence / absence detection unit erroneously detects the presence of the object to be heated due to erroneous detection, the outer diameter determining unit detects that the actual object to be heated has a small diameter even though the actual object to be heated has a small diameter. There is a possibility that the outer diameter of the object to be heated is erroneously determined to be larger than that. When such an erroneous determination occurs, the operation control means controls the burner combustion amount based on such an erroneous determination result. Therefore, although the object to be heated has a small diameter, the burner combustion amount is large. There is a disadvantage that the amount of combustion corresponding to the diameter becomes large and the safety in use decreases.

Similarly, the object to be measured is present even though the object to be measured does not exist due to the failure or the presence of another object different from the object to be measured. It may be falsely detected as a thing.
In this way, the placement state detection means may erroneously detect that the heated object is present even though the heated object is not placed on the virtues, Even if the object is not placed, the operation control means determines that the object to be heated exists. Processing will be performed, and there is a disadvantage that safety in use decreases.

  An object of the present invention is to provide a stove that can improve safety in use by determining whether or not there is an abnormality in a device including a mounting state detection unit and an outer diameter detection unit. It is in.

The stove according to the present invention comprises a burner for heating an object to be heated placed on the virtues, a placement state detecting means for detecting whether the article to be heated is placed on the virtues, An outer diameter detecting means for detecting the outer diameter, and an operation control means for controlling the operation,
The outer diameter detecting means detects the presence / absence of a heated object to detect the existence area of the heated object placed on the five virtues, and detection information of the heated object presence / absence detecting means And an outer diameter discriminating means for discriminating the size of the outer diameter of the object to be heated.
The operation control means is configured to control the combustion state of the burner based on the detection information of the placement state detection means and the outer diameter detection means,
The first characteristic configuration is that the operation control means includes:
It is detected that the object to be heated is not placed on the five virtues by the placement state detecting means, and the presence of the object to be heated is detected by the heated object existence detecting means in the outer diameter detecting means. Then, it is configured to execute an abnormality determination process for determining an abnormal state.

  According to the first characteristic configuration, the operation control means detects that the object to be heated is not placed on the five virtues by the placement state detection means, and the object to be heated in the outer diameter detection means When the presence detection means detects the presence of the object to be heated, it is determined that the state is abnormal. That is, when the presence of the heated object is detected by the heated object presence / absence detecting means even though it is detected that the heated object is not mounted in the five virtue by the mounting state detecting means, The heated object presence / absence detecting means has caused an abnormal operation to detect that the heated object is present even though the heated object is not actually present, or other than the heated object. Since it can be estimated that the presence of an object is erroneously detected as an object to be measured, in such a case, it is determined that the state is abnormal. Then, for example, by notifying that there is an abnormal state, the user can remove any foreign object other than the object to be heated at the detection location in the object to be heated presence detection means or remove the dirt. It is possible to take countermeasures against an abnormal condition such as removing the cause of the abnormality such as a fault.

  Therefore, according to the first characteristic configuration, it is possible to determine whether there is an abnormality in the apparatus including the mounting state detection unit and the outer diameter detection unit, and to improve the safety in use. I was able to provide.

In addition to the first feature configuration, the second feature configuration of the present invention is that the heated object presence / absence detecting means is heated at each of a plurality of positions different from each other in the radial direction of the heated object placed on the five virtues. It is configured with multiple detectors that detect the presence or absence of an object separately,
The operation control means is
In the abnormality determination process, in the state in which it is detected that the object to be heated is not placed on the five virtues by the placement state detection unit, among the plurality of detection units of the object to be heated presence / absence detection unit When at least one of the objects detects the presence of the object to be heated, it is configured to determine that it is in an abnormal state.

  According to the second characteristic configuration, when the plurality of detection units in the heated object presence / absence detecting unit are operating normally, the plurality of detection units are arranged in the radial direction of the heated object placed on the five virtues. The outer diameter of the object to be heated is detected by detecting the presence or absence of the object to be heated at each of a plurality of different positions. And the said control means is in the state in which it is detected that the to-be-heated object is not mounted in the said virtues in the above-mentioned mounting state detection means, Among the several detection parts of the to-be-heated object presence detection means If at least one of these detects the presence of the object to be heated, it is determined that the state is abnormal.

  Even though it is detected that the object to be heated is not placed on the five virtues by the placement state detection means, at least one of the plurality of detection units is the presence of the object to be heated. , It can be estimated that the detection unit is out of order or that the presence of other objects other than the object to be heated is erroneously detected as the object to be measured. Become.

  Therefore, according to the second feature configuration, it is possible to appropriately determine an abnormal state even when a plurality of detection units that individually detect the presence or absence of an object to be heated are provided.

  According to a third feature configuration of the present invention, in addition to the first feature configuration or the second feature configuration, the operation control unit performs the abnormality determination process as a power switch is turned on and power supply is started. When it is determined to be executed and when it is determined that the state is abnormal, it is configured to execute a notification process for notifying the fact by a notification means.

  According to the third feature, since the abnormality determination process is executed as the power switch is turned on and the power supply is started, it is periodically determined whether or not there is an abnormal state. Therefore, it is possible to appropriately detect the abnormal state without erroneously continuing to use it in the abnormal state. Further, when the abnormal state is determined, a notification process for notifying the fact by the notification means is executed, so that the user can recognize that the user is in an abnormal state, and therefore take subsequent measures. Can do.

  According to a fourth characteristic configuration of the present invention, in addition to the third characteristic configuration, when the operation control unit is turned on, the object to be heated is placed on the five virtues by the installation state detection unit. When the presence of the object to be heated is detected by the means for detecting presence or absence of the object to be heated in the outer diameter detecting means, the user is requested to remove the object to be heated from the five virtues. In order to prompt, it is in the point comprised so that the to-be-heated object removal command process notified by an alerting | reporting means may be performed.

  According to the fourth characteristic configuration, when the power switch is turned on, it is detected by the placement state detection means that a heated object is placed on the five virtues, and the outer diameter detection is performed. When the presence of the object to be heated is detected by the object to be heated presence detection means in the means, it is assumed that the object to be heated is placed on the five virtues. Even if the presence of the object to be heated is detected, it is not known whether the detection result is that the object to be heated is normally detected or whether the object is in a state of detecting the presence of the object to be heated due to an abnormality. In order to prompt the user to remove the object to be heated from the five virtues, a notification means notifies the user. And, when the user removes the object to be heated from the virtues, it is detected that the object to be heated is not placed on the five virtues by the placing state detecting means. Whether or not the presence of the object to be heated is detected can determine whether or not the state is abnormal.

The fifth characteristic configuration of the present invention includes a burner for heating an object to be heated placed on the virtues, a placement state detecting means for detecting whether or not the article to be heated is placed on the five virtues, An outer diameter detecting means for detecting the outer diameter of the object, and an operation control means for controlling the operation,
The outer diameter detecting means detects the presence / absence of a heated object to detect the existence area of the heated object placed on the five virtues, and detection information of the heated object presence / absence detecting means And an outer diameter discriminating means for discriminating the size of the outer diameter of the object to be heated.
The operation control means is a stove configured to control the combustion state of the burner based on the detection information of the placement state detection means and the outer diameter detection means,
The heated object presence / absence detecting means includes a plurality of detection units that detect the presence / absence of the heated object at each of a plurality of positions different from each other in a radial direction of the heated object placed on the five virtues,
The operation control means is
The presence of the object to be heated is not detected in any of the plurality of detection units of the object to be heated presence detection means, and the object to be heated is placed on the five virtues by the placement state detection means. If this is detected, an abnormality determination process for determining that the state is abnormal is performed.

  According to the fifth characteristic configuration, the operation control means does not detect the presence of the heated object in any of the plurality of detection units of the heated object presence / absence detecting means in the outer diameter detecting means, and When it is detected by the placement state detection means that an object to be heated is placed on the five virtues, it is determined that the state is abnormal.

  In other words, the plurality of detection units of the heated object presence / absence detecting unit determine the outer diameter of each of the plurality of heated objects having different outer diameters, which are the outer diameter detection targets, based on the presence / absence of the heated object. Even if the object to be heated has the smallest diameter, when it is placed on the five virtues, the detection unit corresponding to the outer diameter will detect the presence of the object to be heated. .

  In spite of the fact that the presence of the object to be heated is not detected in any of the plurality of detection units of the object to be heated presence / absence detection means, the object to be heated is placed on the five virtues by the placement state detecting means. If the mounting state detection means detects that the object to be heated is present even though the object to be heated does not actually exist, Alternatively, since it can be estimated that the presence of an object other than the object to be heated is erroneously detected as the object to be measured, in such a case, it is determined that the state is abnormal.

  As a result, for example, by notifying that there is an abnormal state, the user can remove any foreign object other than the object to be heated at the detection location in the object to be heated presence detection means or remove the dirt. It is possible to take countermeasures against abnormal conditions such as removing the cause of abnormal occurrence such as dripping or changing to a combustion amount corresponding to the actual outer diameter of the object to be heated.

  Therefore, according to the fifth feature configuration, the stove having the mounting state detecting means and the outer diameter detecting means can determine whether or not there is an abnormality and improve the safety in use. I was able to provide.

  According to a sixth feature configuration of the present invention, in addition to the fifth feature configuration, the operation control means executes the abnormality determination process when a power switch is turned on and power supply is started. And when it determines that it is the said abnormal state, it exists in the point comprised so that the alerting | reporting process which alert | reports it with an alerting | reporting means may be performed.

  According to the sixth feature, since the abnormality determination process is executed as the power switch is turned on and the power supply is started, it is periodically determined whether or not there is an abnormal state. Therefore, it is possible to appropriately detect the abnormal state without erroneously continuing to use it in the abnormal state. Further, when the abnormal state is determined, a notification process for notifying the fact by the notification means is executed, so that the user can recognize that the user is in an abnormal state, and therefore take subsequent measures. Is possible.

  According to a seventh feature configuration of the present invention, in addition to any one of the first feature configuration to the sixth feature configuration, when the operation control means is instructed to ignite the burner by an ignition command means, When the abnormality determination process is performed and it is determined that the abnormality is detected, the ignition process for the burner is not performed, or the fuel supply amount to the burner after the ignition process for the burner is performed The combustion amount reduction process is performed to adjust the value to a value smaller than the ignition set value.

  According to the seventh characteristic configuration, when the operation control means executes the abnormality determination process when the ignition command means instructs the ignition of the burner, and determines that it is in the abnormal state, the ignition to the burner Since the process is not executed, or after the ignition process for the burner is executed, the combustion amount reduction process for adjusting the fuel supply amount to the burner to a value smaller than the set value for ignition is executed. When igniting, it is determined whether or not it is in an abnormal state, and if it is in an abnormal state corresponding to the determination result, the ignition process is not executed, or the combustion amount reduction process is executed. Safety can be improved.

  In addition to any one of the second feature configuration to the seventh feature configuration, the eighth feature configuration of the present invention is configured such that the plurality of detection units of the heated object presence / absence detection unit include a central portion of the burner in plan view. A plurality of concentric or almost concentric circles are arranged as a central position, and are arranged in a circumferential direction at intervals, and each of the detection units is provided in a state of being located below the top plate. The optical detection means is configured to detect the reflected light reflected from the bottom of the object to be heated by irradiating light upward through the light transmission window formed on the plate.

  According to the eighth characteristic configuration, the plurality of detection units of the heated object presence / absence detection unit are arranged in a plurality of concentric circles or substantially concentric circles with the central portion of the burner as a central position in plan view, and spaced in the circumferential direction. Since the plurality of detectors arranged in the circumferential direction along one concentric circle all detect the presence of the object to be heated, the outer diameter of the object to be heated is the concentric circle. If the plurality of detection parts do not detect the presence of the object to be heated, the outer diameter of the object to be heated is larger than the diameter of the concentric circles. It can be determined that the diameter is small, and the outer diameter of the object to be heated can be determined using the diameter of the concentric circle as described above as a reference for determining the outer diameter.

  In addition, since the plurality of detection units are arranged in a plurality of concentric circles or substantially concentric circles, the outer diameter of the object to be heated is determined in a plurality of stages using each of the diameters of the plurality of concentric circles as a reference for determining the outer diameter. Can be done. That is, even when there are a plurality of types of heated objects having outer diameters, the outer diameters can be appropriately detected.

  Further, for example, even if a plurality of detection units arranged in the circumferential direction along any one concentric circle among the plurality of concentric circles do not detect the presence of the object to be heated, a set ratio (for example, When the object to be heated is detected by more than a majority), it is possible to determine that the displacement is larger than the diameter of its concentric circles, but the object has been displaced. Regardless of this, it is possible to detect an appropriate outer diameter.

  As a result, even when there are multiple types of objects to be heated with outer diameters and the center position of the object to be heated is deviated from the center position of the burner when placed on the five virtues. The outer diameter of the object to be heated can be detected appropriately.

  Each detection unit is provided in a state of being located below the top plate, and irradiates light upward through a light transmission window formed on the top plate and reflects it at the bottom of the object to be heated. Since it is composed of optical detection means that detects the reflected light coming from, the optical detection means provided on the lower side of the top plate irradiates light through the light transmission window and reflects it by the object to be heated. Since it is configured to determine the outer diameter of the object to be heated by using the reflected light received through the light transmission window, it is only necessary to provide a light transmission window on the top plate. There is no projection that protrudes upward from the top surface of the top plate, and the top surface of the top plate can be finished with a flat surface. As a result, it is possible to improve the appearance of the stove, and it is possible to easily clean the hob without any dust or the like being caught when the upper part of the top plate is cleaned.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic diagram of a built-in stove as a stove according to the present invention. The stove is configured to include three stove burners 30 and a grill 31, and is provided in an installation 33 that is open to a counter 32 of the system kitchen.

  As shown in FIG. 2, each of the combustor sections 30 includes a flat top plate 1 made of a material having heat resistance, a virtues 2 on which a heated object N such as a cooking pan can be placed, and the five virtues. 2 and a gas combustion type burner 3 for heating an object N to be heated. Further, as shown in FIGS. 2 and 4, the control unit 4 that controls the operation of the stove, the operation unit 5 that gives various commands to the control unit 4 by manual operation, for example, a power source D such as a dry battery or a commercial power source. The power switch SW etc. which turn on and off the power supply with respect to a part are provided.

  The burner 3 is a Bunsen combustion type burner, and a gas nozzle 7 for ejecting a fuel gas G supplied through a fuel supply path 6, the fuel gas G is ejected from the gas nozzle 7, and the fuel gas G is ejected. A mixing pipe 8 to which combustion air A is supplied by the accompanying suction action, and a burner main body 10 provided with a plurality of flame ports 9 for jetting the air-fuel mixture supplied from the mixing pipe 8 radially outward. The burner body 10 is exposed upward through an opening 11 formed in the top plate 1. And it is comprised so that the to-be-heated material N may be heated by combusting the air-fuel | gaseous mixture injected from the flame opening 9, and forming a flame. In the fuel supply path 6, an intermittent valve 12 for intermittently supplying the fuel gas G to the gas nozzle 7 and a supply amount of the fuel gas G to the gas nozzle 7 are adjusted to change and adjust the heating power, that is, the combustion amount by the burner 3. A gas amount adjusting valve 13 is provided as a flexible combustion amount adjusting means. An ignition igniter 14 and a thermocouple 15 for confirming the ignition state of the burner 3 are also provided near the flame opening 9 of the burner 3.

  As shown in FIG. 1, the operation unit 5 includes an ignition command means for alternately switching between an ignition command state for instructing an ignition command to the burner 3 and a fire extinguishing command state for instructing a fire extinguishing command each time it is pushed. A point-extinguishing switch 16 as an example, a combustion amount regulator 17 for instructing a change in the combustion amount of the burner 3, and the like are provided.

Each of the three burner units 30 is provided with a placement state detection unit 21 as a placement state detection unit that detects whether or not an object to be heated is placed on the virtues 2.
As shown in FIG. 2, the placement state detection unit 21 is pressed down as the bottom of the heated object N placed on the virtues 2 comes into contact, and detects the heated object placement state. And a telescopic mechanism 22 having a vertically movable portion 22b that is movable up and down over a non-detection position above the placement state detection position and that is urged to return to the non-detection position, and the vertically movable portion 22b. Is mounted with a placement state detection switch 23 that is turned on when the switch is positioned at the detection position and turned off when the vertical movable portion 22b is positioned at the non-detection position.

  The expansion / contraction mechanism 22 is configured by supporting a vertically movable portion 22b on a guide support portion 22a fixed to the casing so as to be movable in the vertical direction in a state of being biased upward by a spring (not shown). When the heated object N is not placed on the virtues 2, the non-detection in a state in which the up and down movable portion 22 b protrudes from the upper end portion receiving the heated object N in the virtues 2 by the return biasing force. As the heated object N is placed on the virtues 2, the vertically movable portion 22 b is pushed down by the bottom of the heated object N to be in the contracted state positioned at the detection position. .

  The placement state detection switch 23 is turned on when the vertically movable portion 22b of the telescopic mechanism 22 is pushed down by the heated object placed on the virtues 2 and positioned at the placement state detection position, and is placed on the virtues 2. When the placed object to be heated is raised and the vertically movable portion 22b returns upward and is positioned at the non-placed state detection position, it is provided to be turned off. The detection result of the mounting state detection switch 23 is input to the control unit 4.

  In addition, in two of the three burner parts 30, the outer diameter detection means K for detecting the size of the outer diameter of the bottom part of the heated object N placed on the virtues 2 is provided. It has been. The outer diameter detecting means K includes a heated object presence / absence detecting means S for detecting the presence / absence of the heated object N so as to detect an existence area of the heated object N placed on the Gotoku 2 and the heated object presence / absence detection. Outer diameter discriminating means 100 for discriminating the size of the outer diameter of the object N to be heated based on the detection information of the means S is provided. The heated object presence / absence detecting means S individually detects the presence / absence of the heated object N at a plurality of positions different from each other in the radial direction of the heated object N placed on the virtues 2. It is configured with.

  The plurality of detection portions of the heated object presence / absence detection means S are arranged in a plurality of concentric circles or substantially concentric circles with the central portion of the burner 3 as a central position in a plan view, and arranged at intervals in the circumferential direction. Each of the detection units is provided in a state of being located below the top plate 1 and irradiated with light upward through a light transmission window 18 formed in the top plate 1 to be heated N The reflection type optical sensors S1 to S8 are used as optical detection means for detecting the reflected light reflected at the bottom of the optical sensor.

  That is, as shown in FIG. 2, the outer shape detection means K is provided in a state of being positioned below the top plate 1 and irradiates light upward through a light transmission window 18 formed on the top plate 1. And based on the detection information of several reflection type optical sensors S1-S8 as a detection part which detects the reflected light reflected in the bottom part of the to-be-heated object N, and the optical sensors S1-S8, to-be-heated object An outer diameter discriminating means 100 for discriminating the outer diameter of N is provided. And as shown in FIG. 4, the to-be-heated object presence-and-absence detection means S is comprised by several reflective optical sensors S1-S8.

  Further, as shown in FIG. 3, the optical sensors S1 to S8 are arranged in a plurality of concentric or substantially concentric circles with the central portion of the burner 3 as a central position in plan view, and about 90 degrees in the circumferential direction. A total of eight are provided in a state of being arranged at intervals. That is, a total of eight photosensors S <b> 1 to S <b> 8 are dispersedly arranged on the outer peripheral portion of the burner 3.

  Then, as shown by a solid line in FIG. 8 (b), when a heated medium N having a standard medium outer diameter (about 20 cm) is placed centered on the center position of the burner 3, the radial direction The four photosensors S1 to S4 located inside the sensor all detect the presence of the heated object N, and the four photosensors S5 to S8 located outside the radial direction all detect the presence of the heated object N The arrangement relationship is such that it does not occur. In addition, in the case of a heated object N having a small diameter smaller than a standard medium outer diameter, as shown by a solid line in FIG. 8 (a), four optical sensors S1 to S4 positioned on the inner side in the radial direction. Are not in the state of detecting the presence of the heated object N, and the heated object N having a large diameter larger than the standard medium outer diameter, as shown by a solid line in FIG. The four photosensors S5 to S8 located outside the sensor are configured to detect the presence of the object N to be heated.

  The light transmission window 18 formed on the top plate 1 is formed in a state in which light is transmitted vertically in each of the locations where the eight outer diameter detection optical sensors S1 to S8 are located. The light transmitting material is different from the material forming the top plate 1.

  The eight outer diameter detection optical sensors S1 to S8 have the same configuration, and as shown in FIG. 2, a light emitting unit 19 that emits light upward through the light transmission window 18, and an upper illumination. The light receiving unit 20 is configured to receive the light reflected by the bottom of the heated object N. The light emitting unit 19 emits light upward through the light transmission window 18. If the heated object N exists at the light irradiation position, the light reflected by the bottom of the heated object N is received by the light receiving unit. 20 receives light, but if the heated object N is not present, light is not received. Therefore, based on the light reception information by the light receiving unit 20, it is possible to determine the presence / absence of the object to be heated N in the upper portion of the light transmission window 18. The light emitting unit 19 is constituted by, for example, a light emitting diode, and the light receiving unit 20 is constituted by a photodiode or the like.

  As shown in FIG. 4, each of the photosensors S1 to S8 is connected to the control unit 4, and the photosensors S1 to S8 emit light at different timings to detect reflected light. It is controlled by the control part 4, and the control part 4 becomes a structure which performs the process which discriminate | determines the outer diameter of a to-be-heated object based on the detection information of each of these optical sensors S1-S8. That is, in this embodiment, the outer diameter discriminating means 100 is configured using the control unit 4. Since the two outer shape detection means K provided in the two combustor sections 30 have the same configuration, one of them is shown as a representative in FIG. 4, and the other outer diameter detection means K is illustrated. Is omitted.

  Further, the control unit 4 is used to control the combustion state of the burner, or to control the operation of the speaker 24 as a notifying means for notifying the user of an abnormal operation as will be described later. Means 101 is configured.

  That is, when the ignition is instructed by the point fire extinguishing switch 16, the control unit 4 controls the gas amount adjusting valve 13 so that the combustion amount of the burner 3 becomes a large combustion amount suitable for ignition. After the ignition process for igniting the burner 3 is performed and the ignition process is performed, the combustion amount corresponding to the outer diameter of the object to be heated N is obtained based on the detection information of the outer diameter detection means K. Thus, it is comprised so that the combustion amount adjustment process which controls the gas amount adjustment valve 13 may be performed.

  Further, the control unit 4 detects that the heated object N is not placed on the virtues 2 by the placement state detecting unit 21, and the heated object presence / absence detecting means in the outer diameter detecting means K is detected. When the presence of the object to be heated N is detected in S, an abnormality determination process for determining that the object is in an abnormal state is executed. In other words, the control unit 4 is configured to execute the abnormality determination process when the power switch SW is turned on and power supply is started, and the power switch SW is turned on. In the state, when the ignition switch 16 is operated and the ignition operation is performed, the abnormality determination process is executed. When the abnormality determination process determines that the abnormal state is present, The speaker 24 is configured to execute a notification process by voice notification, and is further configured not to execute the ignition process for the burner 3 when it is determined that the abnormal state has occurred.

  Further, when the power switch SW is turned on, the control unit 4 detects that the heated object N is placed on the virtues 2 by the placement state detection unit 21 and detects the outer diameter. When the presence of the heated object N is detected by the heated object presence / absence detecting means S in the means K, the heated object to be notified by the speaker 24 to prompt the user to remove the heated object N from the virtues 2 The removal command process is configured to be executed.

Hereinafter, the contents of control by the control unit 4 will be specifically described based on the flowcharts shown in FIGS. 5 and 6.
That is, when the power switch SW is turned on and the power is turned on (step 1), it is detected that the placement state detection switch 23 is turned off and the object to be heated is not placed on the five virtues, and When the presence of the heated object N is detected by the heated object presence / absence detecting means S in the outer diameter detecting means K, that is, at least one of the plurality of optical sensors S1 to S8 is covered. When the presence of the heated object N is detected, it is determined that the state is abnormal, and a notification process is executed (steps 2, 3, and 4). Specifically, the speaker 24 issues a voice command “please remove foreign objects on the top plate”. As a case where the abnormal state as described above is determined, it is conceivable that the light transmission window 18 of the top plate 1 is dirty or other objects are placed on the light transmission window 18. A command for removing the foreign matter is issued.

  If it is determined that the state is abnormal, the notification is continued until the presence of the heated object N is not detected in all the optical sensors S1 to S8 or the power switch SW is turned off ( Step 5). That is, the ignition process for the burner 3 is not executed.

  Further, at that time, it is detected that the placement state detection switch 23 is turned on and the heated object N is placed on the virtues 2, and the heated object presence / absence detecting means S in the outer diameter detecting means K is detected. When the presence of the object to be heated N is detected, that is, when the presence of the object to be heated N is detected by at least one of the plurality of optical sensors S1 to S8, the object to be heated is removed. Command processing is executed (steps 2, 6, and 7). Specifically, the speaker 24 issues a voice command “Please remove the pan once.” Then, when the user removes the object N to be heated, the placement state detection switch 23 is turned off, so that it is possible to proceed to step 3 and perform abnormality determination processing. If the placement state detection switch 23 does not turn off even after the set time has elapsed since the heated object removal command process is started, the process proceeds to the next process (step 8).

  When there is an ignition command by turning on the point fire extinguishing switch 16, a process similar to the abnormality determination process in steps 2 to 4 is executed. That is, it is detected that the placement state detection switch 23 is turned off and the heated object N is not placed on the virtues 2, and heated by any one of the optical sensors S1 to S8 in the outer diameter detection means K. If the presence of the object N is detected, it is determined that the state is abnormal, and notification processing is executed (steps 9 to 12). That is, the voice command “Please remove the foreign matter on the top plate” is issued by the speaker 24. If the presence of the object to be heated N is not detected in all the optical sensors S1 to S8, the operation is normal and the state where the ignition process is not performed is maintained (steps 11 and 27).

  If it is determined in step 10 that the object N to be heated is placed on Gotoku 2, an ignition process for igniting the burner 3 is executed. That is, the intermittent valve 12 is opened and the gas amount adjusting valve 13 is controlled so that the combustion amount of the burner 3 becomes the ignition combustion amount, and the igniter 14 is operated to ignite the burner 3. Thereafter, when the ignition state of the burner 3 is confirmed by the thermocouple 15, the operation of the igniter 14 is stopped (steps 14 to 17). The ignition combustion amount corresponds to a combustion amount larger than the middle of the adjustable range.

  Next, after the burner 3 ignites, the control unit 4 determines whether the outer diameter of the object to be heated is a large diameter, a medium diameter, or a small diameter based on the detection information of the eight optical sensors S1 to S8. An outer diameter determination process for determining whether the diameter is present is executed (step 18).

  At this time, each of the optical sensors S1 to S8 emits light upward at different timings to detect the presence or absence of reflected light. For example, as illustrated in FIG. 7, the control unit 4 starts the detection operation of the first photosensor S1 at time t1, and thereafter, the photosensors S2 to S8 sequentially differ in timing t2. The operation of each of the optical sensors S1 to S8 is controlled so as to start the detection operation at .about.t8. That is, in each of the optical sensors S1 to S8, the light emission unit 19 performs light irradiation, determines whether or not the reflected light is detected by the light receiving unit 20, and detects the presence of the heated object N if there is reflected light. If there is no reflected light, it is determined that the presence of the heated object N is not detected.

  Next, the outer diameter determination process will be described. The control unit 4 includes three or more of the four photosensors S5 to S8 located outside in the radial direction among the eight photosensors S1 to S8. When the presence of the heated object N is detected, it is determined that the heated object N has a large diameter. At this time, the number of three or more is set to 1 when the center of the object to be heated N is displaced from the center position of the burner 3 as indicated by the phantom line in FIG. This is because there is a possibility that the individual optical sensors do not detect the presence.

  Of the four photosensors S5 to S8 positioned on the outer side in the radial direction, two or less detect the presence of the heated object N, and the four photosensors S1 to S4 positioned on the inner side in the radial direction. If three or more of them detect the presence of the object N to be heated, it is determined that the object N has a medium diameter. At this time, three or more discrimination criteria are used, as in the case of the large diameter, the center of the heated object N is positioned with respect to the center position of the burner 3 as shown by the phantom line in FIG. This is because when there is a deviation, one optical sensor may not detect the presence.

  Then, if two or less of the four optical sensors S1 to S4 located on the inner side in the radial direction detect the presence of the heated object N, it is determined that the heated object N has a small diameter. At this time, the number of discriminants is set to 2 or less when the center of the object to be heated N is displaced from the center position of the burner 3 as indicated by the phantom line in FIG. This is because the two optical sensors may not detect the presence.

  And if it discriminate | determines that an outer diameter is large, the gas amount control valve 13 will be controlled so that the combustion amount of the burner 3 may become a large combustion amount suitable for the to-be-heated material N of large diameter, If it is determined, the gas amount adjusting valve 13 is controlled so that the combustion amount of the burner 3 becomes a medium combustion amount suitable for the medium-diameter heated object N. If it is determined that the outer diameter is small, the combustion amount of the burner 3 is reduced to a small diameter. The gas amount adjusting valve 13 is controlled so as to obtain a small combustion amount suitable for the heated object N (steps 19 to 22).

  Thereafter, when the combustion amount regulator 17 is manually operated by the user and there is a combustion amount change command, the gas amount adjustment valve 13 is controlled in accordance with the commanded combustion amount (steps 23 and 24). That is, after starting cooking, the cooking can be performed with the amount of combustion commanded by the user. When a fire extinguishing command is instructed by the point fire extinguishing switch 16, the fire extinguishing process of the burner 3 is executed (steps 25 and 26). That is, the intermittent valve 12 and the gas amount adjustment valve 13 are closed to stop the supply of the fuel gas G, and the combustion of the burner 3 is stopped. If the power switch SW is not turned off, steps 7 to 26 are repeated (step 27).

[Second Embodiment]
Next, a stove according to a second embodiment of the present invention will be described with reference to the drawings.
The stove of this embodiment is the same as the configuration of the first embodiment except that the configuration of the outer diameter detection means and the control processing contents by the control unit are different, so only the different configuration will be described, and the same configuration will not be described. Omitted.

  That is, in the second embodiment, as in the first embodiment, the heated object presence / absence detecting means is heated at each of a plurality of positions different from each other in the radial direction of the heated object placed on the five virtues. In this second embodiment, as shown in FIGS. 11 and 12, the optical sensors as the plurality of detection units are configured to include a plurality of detection units that detect the presence or absence of an object. S1 to S12 are a concentric or substantially concentric form with a center position of the burner 3 in plan view, and a group of concentric or substantially concentric positions (four) 12 are provided in a state of being dispersedly arranged at intervals of about 90 degrees in the circumferential direction, and the presence of the heated object N can be detected even if the heated object N has a small diameter. It has a configuration that can.

  Each of the optical sensors S1 to S12 aligns the center of the heated object N having a standard medium outer diameter (about 20 cm) with the center position of the burner 3, as shown in FIG. The four photosensors S9 to S12 located on the innermost side in the radial direction and the four photosensors S1 to S4 located in the middle in the radial direction all detect the presence of the object N to be heated. The four optical sensors S5 to S8 located on the outermost side in the radial direction are in an arrangement relationship that does not detect the presence of the heated object N. Further, in the case of a heated object N having a small diameter smaller than a standard medium outer diameter, as shown in FIG. 12 (A), four optical sensors S9 to S9 located on the innermost side in the radial direction. S12 detects the presence of the object N to be heated, and the four photosensors S1 to S4 located in the middle of the radial direction and the four photosensors S5 to S8 located on the outermost side in the radial direction are all heated. The arrangement relationship is such that the presence of the object N is not detected. If the heated object N has a larger diameter than the standard medium outer diameter, all the optical sensors S1 to S12 detect the presence of the heated object N as shown by the solid line in FIG. The arrangement relationship is such that a state is established.

  And the said control part 4 does not detect presence of a to-be-heated object in any of these optical sensors S1-S12, and the to-be-heated object is said to the 5 virtues 2 by the installation state detection means 21 mentioned above. When it is detected that N is placed, an abnormality determination process for determining an abnormal state is performed. The control unit 4 is configured to execute the abnormality determination process when the power switch SW is turned on and power supply is started, as in the first embodiment. It is configured to execute the abnormality determination process when the ignition switch is operated by operating the fire extinguishing switch 16 in the state of being turned on, and it is determined that the abnormal state is detected by the abnormality determination process. Then, it is configured to execute a notification process in which the speaker 24 notifies the fact by voice.

Next, the content of control by the control unit 4 will be specifically described based on a flowchart.
As shown in FIG. 9, when the power switch SW is turned on and the power is turned on (step 1), the placement state detection switch 23 is turned off and the presence of the object to be heated N is not detected. If any one of the plurality of optical sensors S1 to S12 in the outer diameter detection means K is in a state where the presence of the object to be heated is detected, it is determined that the state is abnormal and the notification process is executed. (Steps 2, 3, 4). Specifically, the speaker 24 issues a voice command “the pan detection state is abnormal”. If it is determined that the state is abnormal, the notification is continued until the presence of the heated object N is not detected in all the optical sensors S1 to S12 or the power switch SW is turned off ( Step 5).

  In step 2, the placement state detection switch 23 is turned on and the presence of the object N to be heated is detected, and all of the plurality of optical sensors S1 to S12 in the outer diameter detection means K are covered. If the presence of the heated object N is not detected, it is determined that the heated object N is in an abnormal state, and a notification process is executed (steps 6 and 4), and the heated object N is detected in at least one of the optical sensors S1 to S12. If the presence of is detected, the heated object removal command process is executed (step 7). Specifically, the speaker 24 issues a voice command “Please remove the pan once.”

  Even if a set time elapses after the execution of the heated object removal instruction process, the placement state detection switch 23 is turned on and the state where the presence of the heated object N is detected continues. Then, it is determined that the state is abnormal, and notification processing is executed (steps 8 and 9). When the mounting state detection switch 23 is turned off and the presence of the heated object N is not detected, any one of the plurality of optical sensors S1 to S12 in the outer diameter detection means K is covered. If the presence of the heated object is detected, it is determined that the state is abnormal, and a notification process is executed (step 10).

  The placement state detection switch 23 is turned off and the presence of the heated object N is not detected, and the presence of the heated object N is present in all the optical sensors S1 to S12 in the outer diameter detecting means K. When it is detected that the state is not detected, it is determined whether or not there is an ignition command by turning on the fire extinguishing switch 16 (step 11).

  When there is an ignition command, the placement state detection switch 23 is turned on to detect the placement state of the heated object N, and all the optical sensors S1 to S12 are not present. Is detected, it is determined that the state is abnormal, and notification processing similar to step 4 is executed (steps 12, 13, and 14). If it is determined that the state is abnormal, the notification is continued until the power switch SW is turned off (step 15).

  If the placement state detection switch 23 is turned off and it is detected that the heated object N is not placed on Gotoku 2, the ignition process is not performed. If no abnormal state is detected in the abnormality determination process, the ignition process of the burner 3 is executed as in the first embodiment, the outer diameter determination process is performed to adjust the combustion amount according to the outer diameter, If there is a fire extinguishing command, the fire is extinguished (steps 16 to 28). Steps 11 to 28 are repeated until the power switch SW is turned off (step 29).

  Next, the outer diameter determination process will be described. The controller 4 is the same as in the first embodiment, in which three of the four optical sensors S5 to S8 positioned on the outermost side in the radial direction are used. When the above detects the presence of the heated object N, it is determined that the heated object N has a large diameter. Of the four photosensors S5 to S8 located on the outermost side in the radial direction, two or less detect the presence of the heated object N, and the four photosensors S1 located in the middle in the radial direction. When three or more of .about.S4 detect the presence of the heated object N, it is determined that the heated object N has a medium diameter. Of the four photosensors S5 to S8 located in the middle in the radial direction, two or less detect the presence of the heated object N, and the four photosensors S9 located on the innermost side in the radial direction. When three or more of S <b> 12 detect the presence of the heated object N, it is determined that the heated object N has a small diameter.

[Another embodiment]
Next, another embodiment will be described.

(1) In the above-described embodiment, the plurality of optical sensors as the plurality of detection units are concentrically or substantially concentrically formed in a plurality of layers with the center portion of the burner as a central position in plan view, and are concentric circles. Or a group of four (4) located in a concentric or substantially concentric manner is illustrated as being provided in a state of being dispersedly arranged at intervals of about 90 degrees in the circumferential direction, but is not limited to such a configuration, The optical sensor is not limited to being distributed at intervals of 90 degrees in the circumferential direction, and the optical sensors may be arranged at intervals different from 90 degrees in the circumferential direction. A plurality of optical sensors may be arranged side by side in the radial direction. In short, it is only necessary to be able to determine the outer diameter of the object to be heated, and various arrangement configurations can be implemented.

(2) In the above embodiment, the outer diameter of the object to be heated is determined based on the respective detection information detected at different timings by the optical sensors as the plurality of detection units. When the light sensor emits light or receives light with a sharp directivity is used, the detection of the object to be heated is based on the respective detection information simultaneously detected by a plurality of light sensors. It is also possible to determine the outer diameter.

(3) In the above embodiment, the heated object presence / absence detecting means in the outer diameter detecting means includes a plurality of optical sensors as a plurality of detecting parts. It is good also as a structure provided only with one, and it replaces with optical detection means like an optical sensor as a detection part, and comprises with a contact type presence / absence detection means like the mounting state detection means in the said embodiment. But you can.

Further, the outer diameter detecting means may be configured as follows.
In other words, the heated object presence / absence detecting means includes one optical sensor, and the optical sensor drives and moves over a detection moving range for detecting the outer diameter of the heated object along the radial direction of the burner. The outer diameter discriminating means detects the moving position when the optical sensor is moved and the presence / absence of an object to be heated by the optical sensor. The outer diameter of the object to be heated may be determined based on the information.

(4) In the above-described embodiment, the placement state detection unit includes the contact-type placement state detection unit. However, the placement state detection unit includes the same optical detection unit as the optical sensor in the above embodiment. But you can.

(5) In the above embodiment, the abnormality determination process is executed as the power switch is turned on and power supply is started, and the power switch is turned on and operated. Although an example is shown in which the abnormality determination process is executed when a fire extinguishing switch is operated and an ignition operation is performed, a dedicated command switch for manually instructing the abnormality determination process may be provided. You may implement in various forms, such as what performs a discrimination | determination process automatically repeatedly for every set time.

(6) In the above embodiment, when the abnormal state is determined, a notification is made by voice. However, the abnormality may be reported by blinking a lamp or displaying characters. It is not limited to what is notified.

(7) In the above embodiment, when it is determined that the state is abnormal, control is performed so that ignition processing for the burner is not executed. Instead of such configuration, for example, point extinguishing processing for the burner is performed. If it is determined to be in the abnormal state, the fuel supply amount for the burner is set for ignition after executing the ignition process for the burner. It may be configured to execute a combustion amount reduction process for adjusting to a value smaller than the value.

(8) In the above embodiment, the light transmission window 18 and the top plate 1 are made of different materials, but the light transmission window may be made of the same material as the top plate.

Schematic showing the stove installation status Configuration diagram of the stove burner Top view of the stove burner Control block diagram Control flowchart Control flowchart Timing chart for operation Diagram showing the outer diameter discrimination state Control flowchart of the second embodiment Control flowchart of the second embodiment The top view of the stove burner part of 2nd Embodiment The figure which shows the outer diameter discrimination | determination state of 2nd Embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top plate 2 Gotoku 3 Burner 13 Combustion amount adjustment means 16 Ignition command means 18 Light transmission window 21 Mounting state detection means K Outer diameter detection means N Object to be heated S1 to S12 Optical detection means

Claims (8)

A burner that heats the object to be heated placed on the virtues, a placement state detection means that detects whether or not the object to be heated is placed on the virtues, and an outer diameter that detects the outer diameter of the object to be heated A detection means and an operation control means for controlling the operation;
The outer diameter detecting means detects the presence / absence of a heated object to detect the existence area of the heated object placed on the five virtues, and detection information of the heated object presence / absence detecting means And an outer diameter discriminating means for discriminating the size of the outer diameter of the object to be heated.
The operation control means is a stove configured to control the combustion state of the burner based on the detection information of the placement state detection means and the outer diameter detection means,
The operation control means is
It is detected that the object to be heated is not placed on the five virtues by the placement state detecting means, and the presence of the object to be heated is detected by the heated object existence detecting means in the outer diameter detecting means. Then, a stove configured to execute an abnormality determination process for determining an abnormal state. The heated object presence / absence detecting means includes a plurality of detection units that individually detect the presence / absence of the heated object at a plurality of positions different from each other in the radial direction of the heated object placed on the virtues. ,
The operation control means is
In the abnormality determination process, in the state in which it is detected that the object to be heated is not placed on the five virtues by the placement state detection unit, among the plurality of detection units of the object to be heated presence / absence detection unit The stove according to claim 1, wherein at least one of the components is configured to determine that it is in an abnormal state when the presence of an object to be heated is detected. The operation control means is
The abnormality determination process is executed as the power switch is turned on and power supply is started, and
The stove according to claim 1 or 2, configured to execute a notifying process of notifying the abnormality by the notifying means when it is determined that the state is abnormal. The operation control means is
When the power switch is turned on, it is detected that the object to be heated is placed on the virtues by the placing state detecting means, and the presence / absence detection of the object to be heated is detected by the outer diameter detecting means. When the presence of the object to be heated is detected by the means, the object to be heated removal instruction process informed by the notifying means is executed to prompt the user to remove the object to be heated from the five virtues. The stove according to claim 3. A burner that heats the object to be heated placed on the virtues, a placement state detection means that detects whether or not the object to be heated is placed on the virtues, and an outer diameter that detects the outer diameter of the object to be heated A detection means and an operation control means for controlling the operation;
The outer diameter detecting means detects the presence / absence of a heated object to detect the existence area of the heated object placed on the five virtues, and detection information of the heated object presence / absence detecting means And an outer diameter discriminating means for discriminating the size of the outer diameter of the object to be heated.
The operation control means is a stove configured to control the combustion state of the burner based on the detection information of the placement state detection means and the outer diameter detection means,
The heated object presence / absence detecting means includes a plurality of detection units that detect the presence / absence of the heated object at each of a plurality of positions different from each other in a radial direction of the heated object placed on the five virtues,
The operation control means is
The presence of the object to be heated is not detected in any of the plurality of detection units of the object to be heated presence detection means, and the object to be heated is placed on the five virtues by the placement state detection means. A stove configured to execute an abnormality determination process for determining that an abnormal state is detected. The operation control means is
The abnormality determination process is executed as the power switch is turned on and power supply is started, and
The stove according to claim 5, wherein when it is determined that the state is abnormal, a notification process for notifying the fact by a notification unit is performed. The operation control means is
When the ignition command means commands ignition of the burner, the abnormality determination processing is executed, and
If it is determined that the fuel is in an abnormal state, the ignition process for the burner is not executed, or the fuel supply amount to the burner is adjusted to a value smaller than the ignition set value after the ignition process for the burner is executed. The stove according to any one of claims 1 to 6, wherein the stove is configured to perform an amount reduction process. The plurality of detection parts of the heated object presence / absence detection means are provided in a state of being arranged in a plurality of concentric circles or substantially concentric circles with the central portion of the burner as a central position in a plan view, and arranged at intervals in the circumferential direction ,
Each of the detection units is provided in a state of being located on the lower side of the top plate, and is reflected at the bottom of the object to be heated by irradiating light upward through a light transmission window formed on the top plate. The stove according to any one of claims 2 to 7, comprising optical detection means for detecting light.

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