JP2017180867A - Gas cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas cooking stove capable of identifying a kind of a cooking container and identifying loading of several kinds of cooking containers by one sensor.SOLUTION: A magnet 105 is fixed to a supporting shaft 73, one magnetic sensor 101 not moved even when the supporting shaft is vertically moved, is disposed near the magnet, relative positions of the magnetic sensor and the magnet are changed, and further a polarity of magnetic flux detected by the magnetic sensor and magnitude of magnetic flux density are changed by vertical movement of the supporting shaft, and a control portion determines a position in a vertical direction of the supporting shaft 73, of cooking container temperature detection means 72 on the basis of the polarity of magnetic flux detected by the magnetic sensor and the magnitude of the magnetic flux density to identify a configuration of the cooking container 60 and loading/non-loading of the same, and detects the loading of the cooking container by detecting that the cooking container temperature detection means is brought into contact with a bottom surface of the cooking container and pressed down.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a gas stove, and more particularly, to a gas stove having a stove burner that is disposed so that a flame hole protrudes above the top plate through a burner opening formed in the top plate.

  In the gas stove used for various cooking, it is possible to determine whether or not the cooking container is placed on the five virtues as described in Patent Document 1, and the gas stove is placed on the five virtues. There has been proposed a gas stove capable of discriminating whether a cooking container is a flat bottom or a wok with a round bottom and protruding downward.

  This gas stove is a pan bottom temperature sensor having a thermal head with a built-in thermal element that is supported by being urged upward by an upper end portion of a support pipe inserted vertically in a burner inner space surrounded by an annular stove burner. It has.

  Further, when the cooking container is placed on the virtues on the top plate, the thermal head is configured to be pressed down against the bottom surface of the cooking container, and a detector that detects this when the thermal head is pressed down ( Sensor), and the first and second detectors (sensors) are provided as detectors (sensors).

  In addition, the first detector (sensor) can detect the depression of the thermal head with a reference depression amount set equal to the depression amount of the thermal head when the flat cooking container is placed on the virtues. In addition, the second detector (sensor) is configured to detect the pressing of the thermal head in a predetermined range exceeding the reference pressing amount, and the thermal head is pressed down by both the first and second detectors (sensors). The combination of detection and non-detection is that when the cooking container is not placed on the five victories, when the cooking container with a flat bottom surface is placed, It is comprised so that it may differ when it is mounted.

  Based on the combination of detection and non-detection of the depressing of the thermal head by the above two detectors (sensors), it is determined whether or not the cooking container is placed on the virtues, and the cooking placed on the virtues It is configured so that it can be determined whether the container is a flat one with a bottom surface or a wok that has a substantially partial spherical surface and protrudes downward.

  According to the above-described conventional gas stove, the first and second detectors (sensors) are used to place two types of cooking containers, a flat cooking container on the bottom and a wok, on Gotoku. It becomes possible to identify the presence / absence and whether a cooking container with a flat bottom or a wok is placed.

JP 2013-190172 A

  However, in the case of the gas stove disclosed in Patent Document 1, two detectors (sensors) are used to identify the placement of two types of cooking containers, a cooking container with a flat bottom surface and a wok. When the number of types increases to three types, three detectors (sensors) are required to identify the placement of each cooking container.

That is, the same number of detectors (sensors) as the types of cooking containers whose placement should be detected are required.
Therefore, when the number of types of cooking containers whose placement is to be detected increases, the number of necessary detectors (sensors) increases, leading to an increase in manufacturing cost.

  This invention solves the said subject, and can identify the kind of cooking container mounted in five virtues, and identifies mounting of multiple types of cooking containers with one sensor. It is possible to provide a gas stove that can suppress an increase in manufacturing cost even when the number of types of cooking containers whose placement is to be detected increases.

In order to solve the above problems, the gas stove of the present invention is
An annular stove burner provided so that a flame hole portion formed on the outer periphery thereof protrudes above the top plate through an opening for the burner formed on the top plate on the upper surface of the gas stove body,
A control unit that performs point-extinguishing and control of thermal power of the combustor based on the operation of the point-extinguishing operation unit;
The upper end of the vertically extending support shaft, which is arranged so as to be inserted vertically inside the annular burner, is urged upward by a predetermined urging force, and a force exceeding the urging force is applied from above. Cooking vessel temperature detection means supported in such a manner as to move downward when
When the cooking container is placed above the stove burner and the cooking container temperature detection means is pressed down against the bottom surface of the cooking container, this is detected and the cooking container is placed at the cooking position. A gas stove comprising cooking container placement detection means for detecting
(A) A magnet is fixed to a support shaft that supports the cooking vessel temperature detection means, and the support shaft is also moved when the support shaft moves in the vertical direction in the vicinity of the position where the magnet is fixed. One magnetic sensor is arranged in such a manner that it does not move with the vertical movement of the shaft, or
(B) When one magnetic sensor is fixed to the support shaft that supports the cooking vessel temperature detecting means, and the support shaft moves in the vertical direction in the vicinity of the position where the magnetic sensor is fixed. Also, the magnet is arranged in a manner that does not move with the vertical movement of the support shaft, and
As the support shaft moves in the vertical direction, the relative position of the magnetic sensor and the magnet changes, and the polarity of the magnetic flux detected by the magnetic sensor and the magnitude of the magnetic flux density change,
The controller determines the vertical position of the support shaft of the cooking vessel temperature detecting means based on the polarity of the magnetic flux detected by the magnetic sensor and the magnitude of the magnetic flux density, and the cooking vessel And is configured to identify the placement and non-placement of the cooking container,
When the cooking vessel is placed at a predetermined position on the stove burner that is heated by the flame of the stove burner, the cooking vessel temperature detection means is pressed down against the bottom of the cooking vessel. And is configured to detect the placement of the cooking container.

  In the gas stove of the present invention, the magnetic sensor is preferably a Hall IC whose output changes according to the polarity of the applied magnetic flux and the magnitude of the magnetic velocity density.

  The magnet is preferably a permanent magnet.

Further, the control unit has a first state in which a cooking container having a flat bottom surface is placed above the stove burner,
A second state in which the cooking container having a convex bottom surface protruding downward is placed on the five virtues;
The amount by which the cooking container temperature detecting means is pushed down when the cooking container is placed above the stove burner is a pressing amount larger than the amount by which the cooking container temperature detecting means is pushed down in the second state. It is preferable to be configured to detect the state of

According to the gas stove of the present invention, it is possible to identify the type of cooking container used for cooking, and it is possible to identify the presence / absence of placement of a plurality of types of cooking containers using one magnetic sensor. .
Moreover, since it is possible to identify the type of cooking container using one magnetic sensor even when the number of cooking containers used for cooking, that is, the number of cooking containers whose placement should be detected, is increased, An increase in manufacturing cost can be suppressed.

  In addition, when a Hall IC whose output changes according to the polarity of the applied magnetic velocity and the magnitude of the magnetic flux density is used as the magnetic sensor, a large S / N ratio can be obtained. Noise resistance improves, and it becomes possible to improve the performance of identifying the manner of placing a plurality of types of cooking containers and the presence or absence of placement.

  In addition, when a permanent magnet is used as the magnet, it is not necessary to supply power to the magnet and wiring, so that it is possible to provide a gas stove with a simple structure and excellent economic efficiency.

  In addition, the control unit has a first state in which a cooking container having a flat bottom surface is placed above the combustor, and a cooking container having a convex bottom surface protruding downward is placed in the five virtues. In the second state, the amount by which the cooking container temperature detecting means is pushed down when the cooking container is placed above the cooker is larger than the amount by which the cooking container temperature detecting means is pushed in the second state. When the third state is detected, the thermal power control is appropriately performed depending on whether the mounting state is the above-described first state, the second state, or the third state. Can be performed, and the present invention can be made more effective.

It is a top view which shows the gas stove concerning one Embodiment of this invention. It is a side view of the gas burner periphery of the gas stove concerning one Embodiment of this invention. It is a side view of the gas burner periphery of the gas stove concerning one Embodiment of this invention. It is a side view of the gas burner periphery of the gas stove concerning one Embodiment of this invention. It is an enlarged plan view of the left burner vicinity of the gas stove concerning one Embodiment of this invention. It is a flowchart of the subroutine of the thermal power control by the control part of the gas stove concerning one Embodiment of this invention. It is a flowchart of the subroutine of the thermal power control by the control part of the gas stove concerning one Embodiment of this invention. It is a flowchart of the subroutine of the thermal power control by the control part of the gas stove concerning one Embodiment of this invention. It is a flowchart of the subroutine of the thermal power control by the control part of the gas stove concerning one Embodiment of this invention. It is a flowchart of the subroutine of the thermal power control by the control part of the gas stove concerning one Embodiment of this invention. It is a side view of the gas burner periphery of the gas stove concerning one Embodiment of this invention. In the gas stove concerning one embodiment of the present invention, it is a figure showing the state where the cooking container placement detection means has detected the non-placement of the cooking container. In the gas stove concerning one embodiment of the present invention, it is a figure showing the state where the cooking container placement detection part is detecting the 1st state of placing of a cooking container. In the gas stove concerning one embodiment of the present invention, it is a figure showing the state where the cooking container placement detection part is detecting the 2nd state of placing of a cooking container. In the gas stove concerning one embodiment of the present invention, it is a figure showing the state where the cooking container placement detection means has detected the 3rd state of placing of a cooking container. It is a figure which shows the relationship between the magnetic flux density and output voltage of the linear output Hall IC used as a magnetic sensor in the gas stove concerning one Embodiment of this invention. It is a figure which shows the modification of the gas stove concerning one Embodiment of this invention.

  Embodiments of the present invention will be described below to describe the features of the present invention in more detail.

[Embodiment 1]
FIG. 1 is a plan view showing a gas stove (in this embodiment, a gas table stove) according to an embodiment (Embodiment 1) of the present invention.

  In the gas stove A according to one embodiment (Embodiment 1) according to the present invention, the upper surface of the gas stove main body 01 is covered with a top plate 02 as shown in FIG. The gas stove A has a cylindrical shape and includes two gas burners of a left burner 31 and a right burner 32 having an outer diameter of 66 mm, and through a burner opening (not shown) formed in the top plate 02, Each of the flame holes 33 formed on the outer periphery of the gas burner protrudes above the top plate 02.

  In the gas stove A, the left point fire extinguishing operation unit 41 for performing the point fire extinguishing operation of the left burner 31 and the point fire extinguishing operation of the right burner 32 are performed on the front surface of the gas burner A, which is located in front of the left burner 31 and the right burner 32. A right point fire extinguishing operation unit 42 is provided.

  In addition, a control unit (not shown) is disposed in the gas stove A, and the control unit opens and closes a gas valve (not shown) based on the operation of the left point fire extinguishing operation unit 41 and the right point fire extinguishing operation unit 42. And, the fire extinguishing control of the left burner 31 and the right burner 32 is performed by the start / stop of an igniter (not shown). Further, the control unit adjusts the amount of gas supplied to the left burner 31 and the right burner 32 by adjusting the opening of a gas amount adjusting valve by driving a stepping motor (not shown), and the heating power of the left burner 31 and the right burner 32. Control.

  The gas stove A is provided with a gas grill part (not shown). On the front side of the gas stove A, a grill handle 44 for opening and closing a door (not shown) provided on the front face of the gas grill part and a fire extinguishing of the gas grill part. A grill point fire extinguishing operation unit 43 for performing the operation is provided, and exhaust gas from cooking in the gas grill unit is exhausted from a grill exhaust port 45 provided behind the top plate 02.

  Around the flame holes 33 of the left burner 31 and the right burner 32 on the top plate 02, five virtues 50 for placing the cooking containers 60 heated by the stove burner (the left burner 31 and the right burner 32) are arranged. Has been.

  In the virtues 50, a plurality of virtues claws 51 for placing the cooking container 60 are arranged radially around the flame hole portion 33, and the lower ends of the respective virtues claws 51 are connected by an annular virtuosity ring 52. It is placed on the top plate 02. The gas stove A includes two burners, a left burner 31 and a right burner 32. Since both the left burner 31 and the right burner 32 have the same form as the embodiment of the present invention, The embodiment of the left burner 31 will be described in detail, and the detailed description of the right burner 32 will be omitted.

  The left burner 31 will be described in detail. At a location where the gas burner's five virtue claws 51 face each other in the circumferential direction of the flame hole portion 33 (section S in FIG. 5), the virtue claws 51 are arranged in the circumferential direction of the flame hole portion 33. The flame hole portion 33 is configured so that the heating by the left burner 31 is suppressed as compared with a portion that does not exist facing (section F in FIG. 5).

  Specifically, a flame hole is not formed at a location where the virtuosity claw 51 in the circumferential direction of the gas burner is opposed (section S in FIG. 5), and the virtuosity claw 51 in the circumferential direction of the gas burner is opposed. A flame hole is formed only in a portion that does not exist (F section in FIG. 5), and the flame hole portion 33 of the left burner 31 is configured so that heating of the five virtue 50 by the left burner 31 is suppressed.

  In addition, a temperature detection part (burner vicinity temperature detection part) 71 for detecting the temperature in the vicinity of the burner is provided on the top plate 02 at a position away from the flame hole part 33 by a predetermined distance (60 mm in this embodiment). Specifically, as shown in FIG. 1, a temperature detection unit 71 including a thermistor is disposed in the vicinity of the five virtue claws 51 positioned in front of the left burner 31 in a plan view.

  As shown in FIGS. 2 to 4, the temperature sensing unit 78 of the temperature detection unit (burner vicinity temperature detection unit) 71 is a position higher than the upper surface of the top plate 02 by a predetermined height, specifically, , A position slightly higher than half the height dimension (40 mm in this embodiment) from the upper surface of the top plate 02 to the upper end of the virgin claw 51 adjacent to the temperature detection unit 71 (in this embodiment, the top plate 02 27 mm from the top surface). As a result, the following effects can be obtained.

  When a pan is present on the virtues, the flame 81 from the flame hole 33 extends along the bottom surface of the cooking vessel 60 and is formed along the top plate 02 outside the cooking vessel 60 in the outer diameter direction. However, between the flame 81 formed along the top plate 02 and the top plate 02, secondary air for combustion of the flame 81 flows from the outside in the radial direction of the flame 81 to the inside. (See secondary air flow AF in FIG. 11).

  As the secondary air, air present around the gas stove is supplied. The air present around the gas stove generally exhausts around the flame 81 (see the exhaust flow EF in FIG. 11). )), The temperature of the temperature sensing part 78 of the temperature detection part (near temperature detection part) 71 is the same height as the surface of the top plate 02. The temperature sensing unit 78 of the temperature detection unit 71 is cooled by the secondary air, and the temperature detection of the flame 81 by the temperature detection unit 71 may not be performed properly.

  On the other hand, in this embodiment, the position of the temperature sensing part 78 of the temperature detection part (burner vicinity temperature detection part) 71 is made higher than the upper surface of the top plate 02 by the above height dimension (27 mm in this embodiment). In such a case, it is possible to prevent the temperature sensing unit 78 of the temperature detection unit 71 from being excessively cooled by the secondary air.

  Moreover, in this gas stove A, as shown in FIGS. 1-5, the cooking container temperature detection means 72 which detects the temperature of the bottom face of the cooking container 60 in contact with the bottom face of cooking containers 60, such as a pot to the virtues 50. However, the support shaft 73 is provided in such a manner as to penetrate the center of the left burner 31 from the bottom to the top.

  The cooking container temperature detection means 72 and the support shaft 73 are moved up and down in conjunction with the placement of the cooking container 60 on the virtues 50 and the upward movement of the virtues 50 of the cooking container 60 placed on the virtues 50. Move to.

  As shown in FIGS. 12 to 15, a magnet (in this embodiment, a permanent magnet) 105 is disposed (fixed) on the lower end side of the support shaft 73, and extends along the support shaft 73. A magnetic sensor (in this embodiment, a linear output Hall IC that outputs an analog voltage proportional to the magnetic flux density (magnetic field)) 101 is disposed with its reference surface 101a facing the support shaft 73. In addition, the magnetic sensor 101 is attached to the gas stove main body 01, for example so that it may not move with the up-and-down movement of the support shaft 73.

  In the linear output Hall IC used as the magnetic sensor 101 in this embodiment, the relationship between the magnetic flux density (local) and the output voltage shows a relationship as shown in FIG. A voltage corresponding to the polarity of the magnetic flux applied across (see FIGS. 12 to 15) and the magnitude of the magnetic flux density is output.

  The mounting state of the cooking container 60, the magnetic flux density B to the magnetic sensor (linear output Hall IC) 101, the output A of the magnetic sensor (linear output Hall IC) 101, and the detection state of the cooking container mounting detection means 74 are shown. The relationship is as shown in Table 1.

  In this embodiment, the N pole side of the magnet (permanent magnet) 105 faces the reference surface 101a of the magnetic sensor (linear output Hall IC), and the magnetic flux formed from the N pole to the S pole of the magnet 105 is The polarity of the magnetic flux (applied magnetic field) when crossing the magnetic sensor 101 from the reference surface 101a side of the magnetic sensor 101 is defined as positive (plus), and the S pole side of the magnet 105 faces the reference surface 101a of the magnetic sensor 101. The polarity of the magnetic flux (applied magnetic field) when the magnetic flux intersects the magnetic sensor 101 from the back side of the reference surface 101a of the magnetic sensor 101 is defined as negative (minus).

  As shown in FIGS. 12 to 15, on the lower end side of the support shaft 7, the magnet 105 is fixed facing the magnetic sensor 101 with the north pole facing upward and the south pole facing downward. Yes.

  As shown in FIG. 12, when the cooking container 60 is not placed on the virtues 50, the upper end of the cooking container temperature detection means (pan bottom sensor) 72 is positioned above the upper end of the virtues 50.

  At this time, the magnet 105 fixed to the support shaft 73 is positioned above the reference surface 101a of the magnetic sensor 101, and the magnetic flux density B intersecting the reference surface 101a of the magnetic sensor 101 is −20 mT <B ≦ 0. The output A of the magnetic sensor (linear output Hall IC) is 2.1V <A ≦ 2.5V. And at this time, the control part is comprised so that the cooking container mounting detection means 74 may detect the non-mounting of the cooking container 60 in which the cooking container 60 is not mounted on the virtues 50.

  More specifically, the vertical movement of the support shaft 73 is detected by the magnetic sensor 101, and the cooking container temperature detection means 72, the support shaft 73, the magnet 105 fixed to the support shaft 73, and the magnetic sensor 101, Whether or not the cooking container 60 is placed on and the shape of the bottom surface of the cooking container 60 is detected.

  That is, in the gas stove A of this embodiment, the magnet 105 fixed to the support shaft 73 and the magnetic sensor 101 disposed in the vicinity thereof constitute the cooking container placement detection means 74, and cooking When the container 60 is not placed and the upper end of the cooking container temperature detecting means 72 is located above the upper end of the virtues 50, the magnetic flux density B intersecting the reference surface 101a of the magnetic sensor 101 as described above. However, −20 mT <B ≦ 0, and the output A of the magnetic sensor 101 is 2.1 V <A ≦ 2.5 V. At this time, the control unit provided in the gas table stove A is configured to detect the non-placement of the cooking container 60.

  In addition, as shown in FIG. 13, in the state where the cooking container 60 having a flat bottom surface is placed on the virtues 50, the upper end of the cooking container temperature detection means 72 is located at substantially the same height as the upper end of the virtues 50, The south pole of the magnet 105 fixed to the support shaft 73 is located at a height facing the reference surface of the magnetic sensor (linear output Hall IC) and intersects the reference surface of the magnetic sensor (linear output Hall IC). The magnetic flux density B is B ≦ −20 mT, and the output A of the magnetic sensor (linear output Hall IC) is 0 <A ≦ 2.1V. At this time, the control part with which the gas table stove A is provided is comprised so that the 1st state in which the cooking container 60 was mounted may be detected.

  In addition, as shown in FIG. 14, when a cooking container 60 such as a wok having a bottom surface protruding downward is placed on the virtues 50, the cooking container temperature detecting means 72 (pot bottom sensor) ) Is located at a lower height than the upper end of Gotoku 50, and at this time, the N pole of the magnet 105 fixed to the support shaft 73 faces the reference surface 101a of the magnetic sensor (linear output Hall IC) 101. Located at the height, the magnetic flux density B intersecting the reference surface 101a of the magnetic sensor 101 is 20 mT ≦ B, and the output A of the magnetic sensor 101 is 2.9 V ≦ A <5 V. At this time, the control part with which the gas table stove A is provided is comprised so that the 2nd state in which the cooking container 60 was mounted may be detected.

  In addition, as shown in FIG. 15, the outer diameter of the cooking container 60 in plan view is smaller than the outer diameter of the region surrounded by the tip portions of the plurality of five virtue claws 51, and the cooking container 60 is not on the five virtues. In the state of being fitted in the region surrounded by the tip of the virtuosity claw 51, the upper end of the cooking container temperature detecting means 72 is more than the state in which the control unit detects the second state where the cooking container 60 is placed as shown in FIG. Is located at a lower height. At this time, the N pole of the magnet 105 fixed to the support shaft 73 is at a lower position than the magnetic sensor 101, and the reference plane 101a is almost the same as the N pole of the magnet 105. Since they do not face each other, the magnetic flux (magnetic flux density) B intersecting the reference surface 101a of the magnetic sensor 101 is 0 <B <20 mT (below the magnetic flux density B in the second state), and the output A of the magnetic sensor 101 is 2 A 5V <A <2.9 V (becomes smaller than the output A in the second state). And at this time, the control part with which the gas table stove A is provided is comprised so that the 3rd state in which the cooking container 60 was mounted may be detected.

That is,
(1) As shown in FIG. 12, the cooking container 60 is not placed on the virtues 50, the support shaft 73 is moved upward, and the S pole of the magnet 105 fixed to the support shaft 73. Is higher than the reference surface 101a of the magnetic sensor 101, and the magnetic flux (magnetic flux density) B intersecting the reference surface of the magnetic sensor 101 is -20 mT <B ≦ 0, and the magnetic sensor (linear output Hall IC) When the output A is 2.1 V <A ≦ 2.5 V, the control unit provided in the gas table stove A detects the non-placement of the cooking container 60.

  (2) Moreover, as shown in FIG. 13, the cooking container 60 with a flat bottom face is mounted on the virtues 50, and the south pole of the magnet 105 is at a height facing the reference surface 101a of the magnetic sensor 101. When the magnetic flux (magnetic flux density) B that is located and intersects the reference surface 101a of the magnetic sensor 101 is B ≦ −20 mT, and the output A of the magnetic sensor 101 is 0 <A ≦ 2.1V, The control part with which the gas table stove A is provided detects the 1st state in which the cooking container 60 was mounted.

  (3) Further, as shown in FIG. 14, a cooking vessel 60 such as a wok with a bottom surface protruding downward is placed on the virtues 50, and the N pole of the magnet 101 is the reference of the magnetic sensor 101. The magnetic flux (magnetic flux density) B, which is located at a height facing the surface 101a and intersects the reference surface 101a of the magnetic sensor 101, is 20 mT ≦ B, and the output A of the magnetic sensor (linear output Hall IC) is 2. When 9V ≦ A <5V, the control unit provided in the gas table stove A detects the second state where the cooking container 60 is placed.

  (4) Also, as shown in FIG. 15, the outer diameter of the cooking container 60 in plan view is smaller than the outer diameter of the region surrounded by the tip portions of the plurality of five virtue claws 51. Instead, in a state where the magnet 105 is fitted in the region surrounded by the tip of the virtuosity claw 51, the N pole of the magnet 105 is positioned at a lower height than the reference surface of the magnetic sensor (linear output Hall IC), and the magnetic sensor ( The magnetic flux (magnetic flux density) B intersecting the reference plane of the linear output Hall IC is 0 <B <20 mT, and the output A of the magnetic sensor (linear output Hall IC) is 2.5 V <A <2.9 V. The control unit provided in the gas table stove A detects the third state where the cooking container 60 is placed.

  In the gas stove A of this embodiment, the relative position between the magnetic pole of the magnet 105 fixed to the support shaft 73 and one magnetic sensor (linear output Hall IC) arranged to face the support shaft 73 changes. Thus, the control unit determines whether the cooking container 60 is placed according to the polarity and magnitude of the magnetic field (magnetic flux density) applied to one magnetic sensor (linear output Hall IC) arranged to face the support shaft 73 side. It is configured to detect a plurality of placement states of the cooking container 60 by determining the state of the height position of the cooking container temperature detecting means 72 that changes according to the above, and only needs to have one magnetic sensor 101. It is possible to reduce the manufacturing cost by reducing the number of steps for assembling the gas stove.

Next, thermal power control by the control unit will be described.
Based on the operation of the left point fire extinguishing operation unit 41 by the user, the control unit continued the heating power of the left burner 31 for the predetermined time (15 seconds in this embodiment) for the first heating power (2.97 kW in this embodiment) or more. When the temperature detected by the temperature detection unit (burner vicinity temperature detection unit) 71 is equal to or lower than a predetermined threshold temperature SH, a cooking container such as a pot placed on the virtues 50 as shown in FIG. The outer diameter of 60 is smaller than the outer diameter commensurate with the first heating power, the flame 81 protrudes outward from the bottom surface of the cooking vessel 60, and the flame 81 is deflected upward from the surface of the top plate 02. Therefore, the control unit executes the thermal power reduction control that reduces the thermal power of the left burner 31 to the second thermal power (1.39 kW in the present embodiment).

  However, when the control unit detects the second state in which the cooking container 60 such as a wok having a bottom surface protruding downward on the virtues 50 is detected, the thermal power reduction control is executed. do not do.

    Supplementally, when the control unit detects a second state in which the cooking container 60 such as a wok having a bottom surface protruding downward on the virtues 50 is detected, the thermal power reduction control is performed. Is not executed, but when the first state where the cooking container 60 is placed is detected and when the third state where the cooking container 60 is placed is detected, the thermal power reduction control is executed. Will be.

  As a result, when cooking is performed using a wok as the cooking container 60, the control unit reduces the heating power of the stove burner to a predetermined second heating power smaller than the predetermined first heating power (large heating power). The predetermined first thermal power (large thermal power) is maintained without executing the above, and a good cooking finish is obtained.

  That is, when it is preferable to perform cooking with a high heating power as in the case of cooking using a wok, cooking failure due to the reduction of the heating power by the control unit can be prevented.

  In addition, the outer diameter of the cooking container 60 in plan view is smaller than the outer diameter of the region surrounded by the tip portions of the plurality of virtues claw 51, and the cooking container 60 is surrounded by the tip of the virtuos claw 51 instead of on the virtues 50. In the state of being fitted into the region, the thermal power reduction control is executed, so that it can be used safely.

  In the gas stove A according to this embodiment, when the thermal power reduction control is executed, the temperature detection unit when the left burner 31 continues to stop combustion for a predetermined stop time (1 hour in this embodiment) or longer. The temperature detected by the (burner vicinity temperature detection unit) 71 is stored as the detected temperature at the time of combustion stop, and the detected temperature at the time of combustion stop + the predetermined threshold value for temperature rise determination (6.5K in this embodiment) is set as the threshold temperature SH. Used.

  And by execution of fire power reduction control, the state where the flame 81 protrudes outside the bottom surface of the cooking container 60, that is, the state where the flame 81 is deflected upward from the surface of the top plate 02 as shown in FIG. The state where the flame 81 does not protrude beyond the bottom surface of the cooking vessel 60, that is, the state shown in FIG. It is possible to suppress or prevent the handle from being heated excessively or the user from being inadvertently exposed to a flame that protrudes outward from between the bottom surface of the cooking container 60 and the top plate 02 and exposed to a high temperature. it can.

  In addition, when the user tries to change the thermal power by operating the left point fire extinguishing operation unit 41 during the execution of the thermal power reduction control, since the user intends to change the thermal power, the control unit In accordance with the user's intention, the opening degree of the gas amount adjusting valve is adjusted to change the heating power of the left burner 31. That is, even during the execution of the thermal power reduction control, a thermal power change command by the operation of the left point fire extinguishing operation unit 41 is accepted and the thermal power change is performed.

  On the other hand, based on the operation of the left point extinguishing operation unit 41 by the user, the control unit applies the thermal power of the left burner 31 to the first thermal power (2.97 kW in this embodiment) or more for a predetermined time (in this embodiment 15 seconds). ) When the temperature detected by the temperature detector (burner vicinity temperature detector) 71 is higher than a predetermined threshold temperature SH when combustion is continued, the cooking container 60 placed on the virtues 50 The outer diameter is not less than the outer diameter commensurate with the first thermal power, and the flame 81 is formed along the surface of the top plate 02 without the flame 81 protruding outside the bottom surface of the cooking vessel 60, as shown in FIG. Since it can be judged that it is in such a state, a control part maintains the thermal power of the left burner 31 to the thermal power more than 1st thermal power. That is, the thermal power reduction control for reducing the thermal power of the left burner 31 to the second thermal power is not executed.

  Further, in this embodiment, when the cooking container placement detection means 74 detects the placement of the cooking container 60 such as a pan, the cooking container placement is performed when the left burner 31 is heated. When the detection means 74 detects that the cooking container 60 is not placed, the cooking container non-existence control for reducing the heating power of the left burner 31 to a third heating power (0.35 kW in this embodiment) smaller than the second heating power. And the user is prevented from being exposed to the large flame 81 from the left burner 31 when the cooking container 60 is not present.

  When the cooking container placement detection means 74 detects the placement of the cooking container 60 (first state or second state) during execution of the cooking container absence control, the cooking container absence control is terminated. The reduction of the heating power of the left burner 31 to the third heating power is canceled, and the heating power before the execution of the cooking container absence control is restored.

  In addition, the state in which the cooking container placement detection means 74 detects the placement of the cooking container 60 (first state), that is, the thermal power of the left burner 31 before the execution of the cooking container absence control is caused by the execution of the thermal power reduction control. When the heating power is reduced to the second heating power, the cooking container placement detection means 74 detects the placement (first state) of the cooking container 60 after execution of the cooking container absence control and ends the cooking container absence control. The control unit is configured to control the heating power of the left burner 31 as follows in accordance with the elapsed time until it is done.

  (A) The state in which the cooking container placement detection means 74 detects the placement (first state) of the cooking container 60, that is, the thermal power of the left burner 31 before the execution of the cooking container absence control is caused by the execution of the thermal power reduction control. When the heating power is reduced from the heating power equal to or higher than the first heating power to the second heating power, the cooking vessel non-existence control is executed by detecting the non-placement of the cooking vessel 60 by the cooking vessel placement detection means 74 and the left burner 31 is detected. The cooking container placement detection means 74 places the cooking container 60 (first state) after a time within a predetermined set time (30 seconds in this embodiment) has elapsed since the heating power of the cooking container 60 is reduced to the third thermal power. ) Is detected, the execution of the thermal power reduction control is maintained, only the cooking container absence control is terminated, and only the reduction of the thermal power of the left burner 31 to the third thermal power is canceled and the thermal power is changed to the second thermal power. Return to.

  (B) On the other hand, the state in which the cooking container placement detection means 74 detects the placement of the cooking container 60 (first state), that is, the thermal power of the left burner 31 before execution of the cooking container absence control is reduced in thermal power. When the heating power is reduced from the first heating power (for example, DkW) to the second heating power by the execution of the control, the cooking container is not detected by detecting the non-placement of the cooking container 60 by the cooking container placement detection means 74. After the control is executed and the thermal power of the left burner 31 is reduced to the third thermal power, after a time longer than a predetermined set time (in this embodiment, 30 seconds) has elapsed, the cooking container placement detecting means 74 performs the cooking container When the placement of 60 (first state) is detected, the cooking container non-existence control is terminated to cancel the reduction of the thermal power of the left burner 31 to the third thermal power, and the thermal power reduction control is terminated to the left To the second thermal power of the burner 31 To release the reduced, to return the thermal to the first thermal or thermal (e.g., DKW).

  Thus configured, the heating power of the left burner 31 before the cooking container non-existence control is performed is the state in which the cooking container placement detection means 74 detects the placement (first state) of the cooking container 60. When the thermal power is reduced from the first thermal power or higher to the second thermal power by executing the reduction control, the cooking container non-existence control is executed by detecting the non-placement of the cooking container 60 by the cooking container placement detection means 74. Then, after reducing the thermal power of the left burner 31 to the third thermal power, (1) within a predetermined set time (30 seconds in this embodiment), such as when the cooking container 60 is simply raised or lowered. When the cooking container placement detection means 74 detects the placement (first state) of the cooking container 60 after the elapsed time, the flame 81 does not inadvertently protrude beyond the bottom surface of the cooking container 60. Convenient and convenient (2) After a time longer than a predetermined set time (in this embodiment, 30 seconds) has elapsed, such as when the cooking container 60 is replaced, the cooking container placement detection means 74 detects the cooking container 60. When the placement (first state) is detected, the heating power of the left burner 31 is once returned to a heating power (for example, DkW) equal to or higher than the first heating power, so that the cooking container has an outer diameter corresponding to the first heating power. When it is replaced with 60, an operation for returning the thermal power from the second thermal power to the large thermal power is unnecessary.

  Next, in the gas stove A of this embodiment, the process in the control part of the thermal power control of the left burner 31 is demonstrated below using a flowchart.

FIG. 6 is a flowchart of a subroutine related to the storage process of the detected temperature at the time of combustion stop in the control unit.
First, it is determined whether the burner has been burned after shipment (# 101). If the burner has not been burned after shipment, the temperature detector (burner vicinity temperature detector) 71 The detected temperature is updated and stored as the detected temperature when combustion is stopped (# 102).
If combustion has been performed in the burner after shipping in # 101, it is determined whether the combustion stop in the burner continues for one hour or more (# 103), and the combustion stop in the burner is one hour. If it continues, the temperature detected by the temperature detector 71 is updated and stored as the detected temperature at the time of combustion stop (# 102).
If the combustion stop at the burner does not continue for more than 1 hour in # 103, the detected temperature at the time of stopping the combustion is not updated (returns to end the processing for storing the detected temperature at the time of stopping the combustion).

  FIG. 7 is a flowchart for explaining processing in a subroutine related to thermal power reduction control in the control unit.

  First, threshold temperature SH = combustion stop detection temperature + rising temperature determination threshold value Δt (6.5K in this embodiment) is set (# 201).

  Next, it is determined whether or not the burner thermal power has continued above the first thermal power for 15 seconds or more (# 202). If the burner thermal power has continued above the first thermal power for 15 seconds or more, it is determined whether or not the detected temperature of the temperature detection unit (burner vicinity temperature detection unit) ≥ threshold temperature SH (# 203).

  If the detected temperature of the temperature detector 71 is not greater than or equal to the threshold temperature SH, it is determined whether or not the cooking container placement detection means 74 has detected the second state of placement (# 205). If the cooking container placement detection means 74 has not detected the second state of placement, the burner thermal power is reduced to the second thermal power (# 204) and the process returns.

  If the burner thermal power does not continue for more than 15 seconds at # 202 or more than the first thermal power, and if the detected temperature of the degree detection unit ≧ threshold temperature SH at # 203, and the cooking container placement detection means at # 205 If 74 detects the second state of placement, the process returns.

  Supplementally, in the subroutine shown in FIG. 7, it is not determined which placement state other than the second state of placement by the cooking container placement detection unit 74 is detected, and the cooking container placement detection unit 74. Regardless of which mounting state other than the second state of mounting is detected, thermal power reduction control is executed to reduce the burner thermal power to the second thermal power (# 204) according to the conditions shown in the figure. Is done.

  FIG. 9 is a flowchart of a subroutine related to the storage process of the thermal power before the cooking container non-existence control is executed by detecting the non-placement of the cooking container 60 by the cooking container placement detection means 74.

  First, it is determined whether or not the cooking container placement detection means 74 has detected placement of the cooking container 60 (# 401). If the cooking container placement detection means 74 detects the placement of the cooking container 60, it is determined whether or not the heating power reduction control is being executed and the second heating power is being reduced (# 402).

If the thermal power reduction control is being performed and the thermal power reduction control is decreasing, the thermal power reduction flag is set to 1 (# 403), and the process returns.
If the cooking container placement detection means 74 has not detected the placement of the cooking vessel 60 in # 401, the process returns.
If the thermal power reduction control is being executed and not reduced to the second thermal power in # 402, the current thermal power is stored as the thermal power D when the cooking container is placed, and the thermal power reduction flag is set to 0 (# 404), and the return To do.

  In the subroutine of FIG. 9, the cooking container placement detection means 74 detects the placement of the cooking container 60 in # 401, and the thermal power reduction control is being executed in # 402 and is being reduced to the second thermal power. If there is, the detection state of the placement of the cooking container 60 by the cooking container placement detection means 74 is the first state, or the detection state of the placement of the cooking container 60 by the cooking container placement detection means 74 is the third state. This is the case in the detection state. That is, in the subroutine of FIG. 9, when the cooking container placement detection unit 74 detects the first state of placement of the cooking container 60, or when the cooking container placement detection unit 74 detects the placement of the cooking container 60. It is applied only when the third state is detected.

  FIG. 10 is a flowchart of a subroutine related to the end process of the cooking container absence control.

  First, it is determined whether the cooking container placement detection means 74 has detected a change from non-placement of the cooking container 60 to placement (# 501).

  When the cooking container placement detection means 74 detects a change from non-placement of the cooking container 60 to placement, it is determined whether or not the heating power reduction flag = 1 (# 502). If the thermal power reduction flag = 1, it is determined whether or not the elapsed time from the reduction to the third thermal power by the cooking container absence control> the predetermined time L (30 seconds in this embodiment) (# 504). ).

  If the elapsed time from the reduction to the third heating power by the cooking container non-existence control> the predetermined time L, the heating power reduction control is ended and the heating power reduction flag = 0 is set (# 506), and the heating power is stored. Return to the heating power D when the cooking container is placed (# 507) and return.

  In step # 501, if the cooking container placement detection means 74 has not detected a change from the non-placement of the cooking container 60 to the placement, the process directly returns.

  If the thermal power reduction flag is not 1 in # 502, the thermal power is stored in the cooking container placing thermal power D that stores the thermal power (# 503), and the process returns. In step # 504, if the elapsed time from the reduction to the third thermal power by the non-existence control of the cooking container is not the predetermined time L, the thermal power is returned to the second thermal power, the thermal power reduction flag = 1 is maintained, and the process returns.

[Another embodiment]
Next, another embodiment of the present invention will be described.

  In the above embodiment, the magnet (permanent magnet) 105 is fixed to the support shaft 73, and the magnetic sensor (linear output Hall IC) 101 is moved along the support shaft 73 to move the magnetic sensor 101 up and down. Although it is configured to be attached to the gas stove body 01 in such a manner that it does not move with it, the magnetic sensor (linear output Hall IC) 101 is fixed to the support shaft 73 and a magnet (permanent magnet) 105 is provided in the vicinity of the magnetic sensor. It is also possible to provide a configuration. In this case, since the magnetic sensor (linear output Hall IC) 101 moves up and down together with the support shaft 73, the wiring to the magnetic sensor (linear output Hall IC) 101 should have sufficient flexibility. Is required.

  In the above embodiment, the linear output Hall IC is used as the magnetic sensor 101. However, a Hall element may be used instead of the linear output Hall IC. However, the linear output Hall IC has a built-in amplifier that amplifies the output of the Hall element. However, if a simple Hall element is used, the amplifier that amplifies the output of the Hall element is not built in, and the manufacturing cost is reduced. Although it is possible, it is susceptible to external noise, so it is desirable to consider whether to use a Hall element depending on the situation.

  Moreover, in the said embodiment, although the permanent magnet is used as the magnet 105, it is also possible to use an electromagnet instead of a permanent magnet as a magnet.

  In the above embodiment, the detected temperature of the temperature detector (burner vicinity temperature detector) 71 when the left burner 31 continues to stop combustion for a predetermined stop time (1 hour in this embodiment) or more is stopped. As the predetermined threshold temperature SH, the predetermined threshold temperature SH = the detected temperature at the time of combustion stop + the predetermined threshold for temperature rise determination (6.5K in this embodiment) is used. On the other hand, a comparative temperature detection is performed at a position further away from a predetermined distance (60 mm in the above embodiment) from the flame hole portion 33 of the left burner 31 to the temperature detection portion 71 (for example, a position of 250 mm from the flame hole portion 33). Section 77 (see FIG. 17), and as a predetermined threshold temperature SH, a comparison temperature detection section that is obtained by the following formula: threshold temperature SH = detected temperature of comparison temperature detection section 77 + rising temperature determination threshold (for example, 6.5K) A temperature obtained by adding a rising temperature determination threshold to the temperature detected by 77 may be used.

  In the case of this configuration, the thermal power reduction control is executed based on the flowchart shown in FIG. The flowchart of FIG. 8 simply replaces the detected temperature at the time of combustion stop in the flowchart of FIG. 7 described above with the detected temperature of the comparison temperature detection unit 77, and thus detailed description thereof is omitted.

  Moreover, although the said embodiment demonstrated the case where this invention was applied to the gas table stove, this invention is applicable also to a built-in stove. In addition, the number of gas burners provided in the gas stove is not limited to two, and the present invention can be applied to a one-hole gas stove and three or more gas stoves.

  Moreover, in the said embodiment, a flame hole is not formed in the part facing the virtuosity claw 51 of a gas burner, and the flame hole part 33 exists in the location where the virtuosity claw 51 exists in the circumferential direction of the flame hole part 33. The heating by the left burner 31 is suppressed as compared with the absence of the virgin claw 51 in the circumferential direction, but compared with the pitch between adjacent flame holes in the region not opposed to the virtuous claw 51 of the gas burner. Then, by widening the pitch between the adjacent flame holes in the region facing the gas burner's virtuosity claw 51, the virtuosity claw 51 in the circumferential direction of the flame hole portion 33 is not located at the location where the virtuosity claw 51 is present. It is also possible to configure so that heating by the left burner 31 is suppressed as compared with the existing location.

  Further, in the above embodiment, when the user intends to change the thermal power during the execution of the thermal power reduction control, even if the thermal power reduction control is being executed, the thermal power change command by the operation of the point-extinguishing operation unit is performed. However, it is also possible to configure so as not to accept a thermal power increase command from the point-extinguishing operation unit during execution of the thermal power reduction control.

  In addition, it is also possible to notify that a thermal power increase command has been issued by an alarm sound by a thermal power increase command by the point fire extinguishing operation unit during execution of the thermal power decrease control.

  The present invention is not limited to the above embodiment in other points, and various modifications can be made within the scope of the present invention.

A gas stove (gas table stove)
AF Flow of secondary air EF Flow of exhaust around the flame F Location where the five virtue claws are not facing each other S Location where the five virtue claws are facing each other 01 Gas stove body 02 Top plate 31 Left burner (combustor)
32 Right burner
33 Flame hole part 41 Left point fire extinguishing operation part 42 Right point fire extinguishing operation part 43 Grill point fire extinguishing operation part 44 Grill handle 45 Grill exhaust port 50 Gotoku 51 Gotoku claw 52 Gotoku ring 60 Cooking container 71 Temperature detection part (Burner vicinity temperature detection part) )
72 Cooking container temperature detection means 73 Support shaft 74 Cooking container placement detection means 77 Temperature detection part for comparison 78 Temperature sensing part of temperature detection part 81 Flame 101 Porcelain sensor (linear output Hall IC)
101a Reference surface of porcelain sensor 105 Magnet (permanent magnet)

Claims (4)

An annular stove burner provided so that a flame hole portion formed on the outer periphery thereof protrudes above the top plate through an opening for the burner formed on the top plate on the upper surface of the gas stove body,
A control unit that performs point-extinguishing and control of thermal power of the combustor based on the operation of the point-extinguishing operation unit;
The upper end of the vertically extending support shaft, which is arranged so as to be inserted vertically inside the annular burner, is urged upward by a predetermined urging force, and a force exceeding the urging force is applied from above. Cooking vessel temperature detection means supported in such a manner as to move downward when
When the cooking container is placed above the stove burner and the cooking container temperature detection means is pressed down against the bottom surface of the cooking container, this is detected and the cooking container is placed at the cooking position. A gas stove comprising cooking container placement detection means for detecting
(A) A magnet is fixed to a support shaft that supports the cooking vessel temperature detection means, and the support shaft is also moved when the support shaft moves in the vertical direction in the vicinity of the position where the magnet is fixed. One magnetic sensor is arranged in such a manner that it does not move with the vertical movement of the shaft, or
(B) When one magnetic sensor is fixed to the support shaft that supports the cooking vessel temperature detecting means, and the support shaft moves in the vertical direction in the vicinity of the position where the magnetic sensor is fixed. Also, the magnet is arranged in a manner that does not move with the vertical movement of the support shaft, and
As the support shaft moves in the vertical direction, the relative position of the magnetic sensor and the magnet changes, and the polarity of the magnetic flux detected by the magnetic sensor and the magnitude of the magnetic flux density change,
The controller determines the vertical position of the support shaft of the cooking vessel temperature detecting means based on the polarity of the magnetic flux detected by the magnetic sensor and the magnitude of the magnetic flux density, and the cooking vessel And is configured to identify the placement and non-placement of the cooking container,
When the cooking vessel is placed at a predetermined position on the stove burner that is heated by the flame of the stove burner, the cooking vessel temperature detection means is pressed down against the bottom of the cooking vessel. And a gas stove that is configured to detect the placement of the cooking container.   2. The gas stove according to claim 1, wherein the magnetic sensor is a Hall IC whose output changes in accordance with the polarity of the magnetic flux applied and the magnitude of the magnetic velocity density.   The gas stove according to claim 1 or 2, wherein the magnet is a permanent magnet. The control unit has a first state in which a cooking container having a flat bottom surface is placed above the stove burner;
A second state in which the cooking container having a convex bottom surface protruding downward is placed on the five virtues;
The amount by which the cooking container temperature detecting means is pushed down when the cooking container is placed above the stove burner is a pressing amount larger than the amount by which the cooking container temperature detecting means is pushed down in the second state. The gas stove according to any one of claims 1 to 3, wherein the gas stove is configured to detect the following condition.

Images