JP6858439B2 - Gas stove - Google Patents

Description

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

Among the gas stoves used for various cooking, there is a gas stove as described in Patent Document 1.

The gas stove of Patent Document 1 is a stove burner provided so as to project a flame hole portion above the top plate through a burner opening formed in the top plate, and a stove burner based on the operation of the point fire extinguishing operation portion. A control unit that extinguishes the fire and controls the thermal power is provided, and a temperature detection unit is provided at a position on the top plate at a predetermined distance from the flame hole portion. When the above thermal power is continued for a predetermined time and the detection temperature of the temperature detection unit is equal to or lower than the predetermined threshold temperature, the thermal power reduction control for reducing the thermal power of the stove burner to a predetermined second thermal power smaller than the predetermined first thermal power. Is configured to run.

According to the gas stove of Patent Document 1, the size (diameter) of the cooking container placed on the trivet can be determined, and the user carelessly approaches the flame protruding to the outside of the cooking container. It is possible to prevent the user from being exposed to high temperatures.

Japanese Unexamined Patent Publication No. 2013-253750

However, the wok has a substantially spherical shape whose bottom surface is a convex surface protruding downward. Therefore, in the above-mentioned conventional gas stove, when a wok is used as a cooking container, the flame formed on the stove burner is formed when the heating power of the stove burner continues to be equal to or higher than the predetermined first heating power for a predetermined time. Since the pan is deflected upward along the bottom of the pan on the peripheral side of the pan, the detection temperature detected by the temperature detector arranged at a predetermined distance from the flame hole on the top plate is predetermined. It may fall below the threshold temperature.

As a result, even in a situation where cooking with the predetermined first thermal power should be continued, the thermal power reduction control for reducing the thermal power of the stove burner to a predetermined second thermal power smaller than the predetermined first thermal power is executed. become.

That is, in general, a Chinese pot is a cooking container (pot) that is often used for cooking stir-fried foods such as fried rice and stir-fried vegetables. By doing so, a good cooking finish can be obtained.

However, in the cooking of stir-fried foods such as fried rice and stir-fried vegetables, when cooking is performed with the above-mentioned conventional gas stove using a wok, the heating power of the stove burner is reduced to a predetermined second heating power smaller than the predetermined first heating power. Since the reduction control is executed, there is a problem that a large heating power (predetermined first heating power) is not maintained and a good cooking finish may not be obtained.

In addition, there is a problem that it is necessary to take appropriate measures even when a small cooking container is used in which the cooking container fits inside the trivet claws that make up the trivet.

The present invention solves the above-mentioned problems, it is possible to identify the type and size of the cooking container, and it is possible to cook appropriately according to the type and size of the cooking container without endangering the user. The purpose is to provide a gas stove capable of performing.

In order to solve the above problems, the gas stove of the present invention
An annular stove burner provided so that a flame hole formed on the outer periphery thereof protrudes above the top plate through a burner opening formed in the top plate on the upper surface of the gas stove body.
A control unit that controls the point fire extinguishing and thermal power of the stove burner based on the operation of the point fire extinguishing operation unit.
A gas stove with a trivet and a plurality of trivet claws arranged around the flame hole of the stove burner and supporting a cooking container heated by the stove burner.
A temperature detection unit arranged at a predetermined distance from the flame hole portion on the top plate, and a temperature detection unit.
A cooking container temperature detecting means that is vertically urged and supported by the upper end of a support shaft that extends vertically through the center of the stove burner in a plan view.
When the cooking container is placed above the stove burner and the cooking container temperature detecting means abuts on the bottom surface of the cooking container and is pushed down, the cooking container is placed at the cooking position by detecting this. It is equipped with a cooking container placement detection means to detect that.
Wherein detection by the cooking container placement置検detecting means state, and (1) a flat cooking container bottom is placed on the trivet, depression amount of the cooking vessel temperature detecting means in a state of being supported by the trivet claws, ( 2) The cooking container in a state where a cooking container having a convex surface whose bottom surface protrudes downward is placed on the trivet and the lower end of the cooking container reaches below the area surrounded by the plurality of the trivet claws. The amount of pushing down of the temperature detecting means and (3) a cooking container having a flat bottom surface and a diameter smaller than the area surrounded by the plurality of the trivet claws is placed on the trivet and by the tip of the trivet claw. The detection state is different depending on the amount of pushing down of the cooking container temperature detecting means in the state of being fitted in the enclosed area.
The control unit is the first state in which the flat-bottomed cooking container is placed on the Gotoku (1), and the cooking container (2) in which the bottom surface is a convex surface protruding downward. Is placed in the Gotoku, and the pushing down amount of the cooking container temperature detecting means is larger than the pushing down amount of the cooking container temperature detecting means in the first state, and the second state (3). A cooking container having a flat bottom surface and a smaller bottom diameter than the area surrounded by the Gotoku claws is placed so as to fit into the area surrounded by the tips of the Gotoku claws. It is configured to detect a third state in which the pushing down amount of the container temperature detecting means is a pushing down amount larger than the pushing down amount of the cooking container temperature detecting means in the second state.
When the thermal power of the stove burner is equal to or higher than the predetermined first thermal power for a predetermined time and the detection temperature of the temperature detection unit is equal to or lower than the predetermined threshold temperature, the control unit
(A) When the first state is detected, a thermal power reduction control for reducing the thermal power of the stove burner to a predetermined second thermal power smaller than the predetermined first thermal power is executed.
(B) When the second state is detected, the heating power reduction control is not executed, and the heating power of the stove burner is maintained at a heating power equal to or higher than the predetermined first heating power.
(C) It is characterized in that it is configured to execute the thermal power reduction control when the third state is detected.

In the gas stove of the present invention, the detection temperature of the temperature detection unit when the control burner continues to stop combustion for a predetermined stop time or longer is stored as the detection temperature at the time of combustion stop, and the predetermined threshold temperature is set. , It is preferable that the temperature is set to a temperature obtained by adding a predetermined threshold for determining the rising temperature to the detection temperature at the time of combustion stop.

Further, a comparison temperature detection unit is provided at a position further away from the flame hole portion by the predetermined distance, and the predetermined threshold temperature is determined to be a predetermined rising temperature as the detection temperature by the comparison temperature detection unit. It is preferable to set the temperature to which the threshold value is added.

Further, it is preferable that the operation unit and the temperature detection unit are located on the front side of the flame hole portion.

The trivet is formed by arranging a plurality of trivet claws for placing a cooking container radially around the flame hole portion.
At the location where the trivet claw is present in the circumferential direction of the flame hole portion, the flame hole portion is suppressed so as to suppress heating by the stove burner as compared with the location where the trivet claw is not present in the circumferential direction of the flame hole portion. Is configured, and it is preferable that the temperature detection unit is arranged in a region in the vicinity of the trivet claw in a plan view where heating by the stove burner is suppressed.

Further, it is preferable that the temperature sensing portion of the temperature detecting portion is located at a position higher than the upper surface of the top plate by a predetermined height dimension at the arrangement position of the temperature detecting portion.

Further, it is preferable that the predetermined height dimension is ½ or more of the height dimension from the upper surface of the top plate to the upper end of the trivet claw at the arrangement position of the temperature detection unit.

Further, when the cooking container mounting detecting means detects that the cooking container is not placed during heating by the stove burner in a state where the cooking container mounting detecting means detects the mounting of the cooking container, the cooking container mounting detecting means detects that the cooking container is not placed. The control unit executes a cooking container absence control that reduces the heating power of the control burner to a predetermined third heating power smaller than the predetermined second heating power.
When the cooking container placement detecting means detects the placement of the cooking container during the execution of the cooking container absence control, the cooking container absence control is terminated and the predetermined third of the thermal power of the stove burner. Release the reduction to firepower,
Before the execution of the cooking container absence control execution, the thermal power of the stove burner in a state where the cooking container placement detecting means detects the placement of the cooking container is reduced to the predetermined second thermal power by the execution of the thermal power reduction control. When the thermal power is increased, the control unit
(A) The cooking container non-existence control is executed by the detection of the non-placement of the cooking container by the cooking container mounting detection means to reduce the thermal power of the stove burner to the predetermined third thermal power, and then a predetermined When the cooking container placement detecting means detects the placement of the cooking container after the lapse of time within the set time, the execution of the heating power reduction control is maintained and only the cooking container absence control is terminated. Then, only the reduction of the thermal power of the stove burner to the predetermined third thermal power is released, and the thermal power is returned to the second thermal power.
(B) The cooking container non-existence control is executed by the detection of the non-placement of the cooking container by the cooking container mounting detection means to reduce the heating power of the stove burner to the predetermined third heating power, and then a predetermined When the cooking container placement detecting means detects the placement of the cooking container after a time longer than the set time has elapsed, the cooking container absence control is terminated and the predetermined number of the thermal power of the control burner is increased. 3 It is preferable that the reduction to the thermal power is released, and the reduction of the thermal power of the stove burner to the predetermined second thermal power is released by ending the thermal power reduction control.

Since the gas stove of the present invention is configured as described above, the size of the cooking container heated by the stove burner can be determined, and the user is not affected by the flame protruding to the outside of the bottom of the cooking container. It is possible to prevent the user from being exposed to high temperatures by approaching the preparation, and when cooking using a wok as a cooking container, the heating power of the stove burner is unintentionally set to a predetermined value. The predetermined first thermal power (large thermal power) is maintained and a good cooking finish is obtained without executing the thermal power reduction control that reduces the primary thermal power (large thermal power) to a predetermined second thermal power smaller than the first thermal power (large thermal power). Can provide a gas stove capable of. That is, by using the gas stove of the present invention, when cooking is performed using a wok as a cooking container, the heating power of the stove burner is unintentionally reduced to the second heating power smaller than the first heating power (large heating power). Since the predetermined first thermal power (large thermal power) is maintained without being forced to cook, cooking such as fried rice and stir-fried vegetables can be performed satisfactorily.
Further, the outer diameter of the cooking container in the plan view is smaller than the outer diameter of the area surrounded by the tips of the plurality of trivet claws, and the cooking container is not on the trivet but in the area surrounded by the tips of the trivet claws 51. In the fitted state, the thermal power reduction control is executed, so that it can be used safely.

Further, the detection temperature of the temperature detection unit when the stove burner continues to stop combustion for a predetermined stop time or longer is stored as the detection temperature at the time of combustion stop, and the predetermined threshold temperature is set as the detection temperature at the time of combustion stop. When the temperature is set to the value obtained by adding a predetermined threshold for determining the rising temperature, even if the ambient temperature of the gas stove fluctuates due to different seasons, a cooking container with a smaller diameter than the cooking container suitable for the first thermal power will be on the trivet. It is possible to accurately judge whether or not it is placed, and it is a mistake due to seasonal changes as to whether or not a cooking container with a diameter smaller than the cooking container suitable for the first thermal power is placed on the trivet. It becomes possible to prevent the judgment, and it is possible to provide a gas stove that is easy to use. Moreover, the temperature detected by the temperature detection unit can be used as the detection temperature at the time of combustion stop, and a separate temperature detection unit for detecting the detection temperature at the time of combustion stop is not required, which leads to an increase in cost. It is meaningful because it can improve convenience.

Further, a comparison temperature detection unit is provided at a position further away from the flame hole portion by the predetermined distance, and the predetermined threshold temperature is determined to be a predetermined rising temperature as the detection temperature by the comparison temperature detection unit. Even if the ambient temperature of the gas stove fluctuates when the temperature is set to the sum of the threshold for use, it is accurate to check whether a cooking container with a smaller diameter than the cooking container suitable for the first thermal power is placed on the trivet. It is possible to prevent erroneous judgment due to changes in ambient temperature as to whether or not a cooking container with a smaller diameter than the cooking container suitable for the first thermal power is placed on the trivet. Therefore, it is possible to provide an easy-to-use gas stove. Moreover, even in the case of a gas stove equipped with a plurality of gas burners, it is not necessary to provide one for each of the plurality of gas burners, and only one is provided. Therefore, the gas stove is highly convenient without increasing the cost. Will be able to provide.

In addition, when the operation unit and the temperature detection unit are located on the front side of the flame hole portion, the flame on the front side of the flame hole portion, which is easily accessible to the user, protrudes to the outside of the bottom of the cooking container. In addition to being able to detect accurately, it is possible to more accurately prevent the user from being exposed to high temperatures due to the user inadvertently approaching the protruding flame. In the case of this configuration, even if a cooking container of a size suitable for the first heating power is placed on the trivet with its center shifted backward, the flame is prevented from protruding to the outside of the pot bottom. It is also meaningful in that it can be done.

In addition, the trivet is formed by arranging a plurality of trivet claws for placing the cooking container in a radial pattern around the flame hole, and the flame hole is present at the location of the trivet claw in the circumferential direction of the flame hole. Compared to the non-existent part of the trivet claw in the circumferential direction of the part, the flame hole part is configured so that the heating by the stove burner is suppressed, and the temperature detection part is in the vicinity of the trivet claw in the plan view, and the heating by the stove burner is performed. When it is configured to be arranged in the region to be suppressed, it is possible to suppress the temperature of the temperature detection unit from becoming excessively high, and it is possible to suppress the deterioration of the temperature detection unit due to the high temperature, resulting in durability. It becomes possible to provide an excellent gas stove.

That is, in the place where the trivet claw is present in the circumferential direction of the flame hole, the flame hole is configured so that the heating by the stove burner is suppressed as compared with the place where the trivet claw is not present in the circumferential direction of the flame hole. By arranging the temperature detection unit in the area near the trivet claw in plan view where heating by the stove burner is suppressed, the temperature of the temperature detection unit is suppressed from becoming excessively high, resulting in durability. An excellent gas stove can be obtained.

In addition, by providing the temperature sensing part of the temperature detecting part at a position higher than the upper surface of the top plate by a predetermined height dimension, when the cooking container exists on the trivet, it is along the bottom of the cooking container. It is possible to appropriately detect the temperature of the flame formed along the top plate toward the outside in the radial direction, and the present invention can be more effectively implemented.

In other words, when the cooking container exists on the trivet, the flame from the flame hole extends along the bottom of the cooking container and is formed along the top plate toward the outside in the radial direction, but the top. Secondary air for combustion flows between the flame formed along the plate and the top plate from the outside to the inside in the radial direction of the flame. Then, as this secondary air, the air existing around the gas stove is supplied, and the air existing around the gas stove is generally significantly lower than the temperature of the flame (normal temperature). When the position of the temperature sensing part of the temperature detecting part is the same as the surface of the top plate, the temperature detecting part is cooled by this secondary air, and the temperature of the flame is not properly detected by the temperature detecting part. Although there is a risk, by raising the position of the temperature sensing part of the temperature detecting part by a predetermined height dimension above the top plate, it is possible to prevent the temperature detecting part from being excessively cooled by this secondary air. Can be done.

Further, when the above-mentioned predetermined height dimension of the temperature sensing portion of the temperature detecting portion is set to 1/2 or more of the height dimension from the upper surface of the top plate to the upper end of the trivet claw at the arrangement position of the temperature detecting portion. , It becomes possible to more reliably detect the temperature of the flame from the flame hole portion.

That is, when a pot exists on the trivet, when the flame from the flame hole extends along the bottom of the pot and is formed along the top plate in the outer radial direction, it is formed along the top plate. Most of the secondary air for flame combustion that flows between the flame and the top plate from the outer diameter direction to the inner diameter direction of the flame is an abbreviation for the height dimension from the upper surface of the top plate to the upper end of the trivet claw. Since it flows in a region up to a height of 1/2 or less, the temperature detection unit is secondary by setting the position of the temperature detection unit to 1/2 or more of the height dimension from the upper surface of the top plate to the upper end of the trivet claw. It is possible to properly detect the temperature of the flame by preventing it from being excessively cooled by the air.

Further, by providing the gas stove of the present invention with the configuration as described in claim 8 of the present application, it is possible to provide a gas stove that is safer and more convenient to use.

It is a top view which shows the gas stove which concerns on one Embodiment of this invention. It is a side view around the gas burner of the gas stove which concerns on one Embodiment of this invention. It is a side view around the gas burner of the gas stove which concerns on one Embodiment of this invention. It is a side view around the gas burner of the gas stove which concerns on one Embodiment of this invention. It is an enlarged plan view near the left burner of the gas stove which concerns on one Embodiment of this invention. It is a flowchart of the subroutine of thermal power control by the control part of the gas stove which concerns on one Embodiment of this invention. It is a flowchart of the subroutine of thermal power control by the control part of the gas stove which concerns on one Embodiment of this invention. It is a flowchart of the subroutine of thermal power control by the control part of the gas stove which concerns on one Embodiment of this invention. It is a flowchart of the subroutine of thermal power control by the control part of the gas stove which concerns on one Embodiment of this invention. It is a flowchart of the subroutine of thermal power control by the control part of the gas stove which concerns on one Embodiment of this invention. It is a side view around the gas burner of the gas stove which concerns on one Embodiment of this invention. It is a figure which shows the state which the cooking container mounting detection means detects the non-placement of a cooking container in the gas stove which concerns on one Embodiment of this invention. It is a figure which shows the state which the cooking container mounting detection means has detected the 1st state of mounting of a cooking container in the gas stove which concerns on one Embodiment of this invention. It is a figure which shows the state which the cooking container mounting detection means has detected the second state of mounting of a cooking container in the gas stove which concerns on one Embodiment of this invention. It is a figure which shows the state which the cooking container mounting detection means has detected the 3rd state of mounting of a cooking container in the gas stove which concerns on one Embodiment of this invention. It is a figure which shows the relationship between the magnetic flux density and the output voltage of the linear output Hall IC used as a magnetic sensor in the gas stove according to one Embodiment of this invention. It is a figure which shows the modification of the gas stove which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be shown, and the features of the present invention will be described 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 of the present invention (Embodiment 1).

As shown in FIG. 1, the upper surface of the gas stove main body 01 of the gas stove A according to the embodiment (Embodiment 1) according to the present invention is covered with a top plate 02. Further, the gas stove A is provided with two gas burners, a left burner 31 and a right burner 32, which are cylindrical and have an outer diameter of 66 mm, and are provided through a burner opening (not shown) formed in the top plate 02. The flame hole portions 33 formed on the outer periphery of the gas burner are projected above the top plate 02.

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

Further, a control unit (not shown) is arranged in the gas stove A, and the control unit opens and closes a gas valve (not shown) based on the operations of the left point fire extinguishing operation unit 41 and the right point fire extinguishing operation unit 42. , And the point fire extinguishing of the left burner 31 and the right burner 32 is controlled by starting and stopping an igniter (not shown). Further, the control unit adjusts the opening degree of the gas amount adjusting valve by driving a stepping motor (not shown) to adjust the amount of gas supplied to the left burner 31 and the right burner 32, and the thermal power of the left burner 31 and the right burner 32. To control.

Further, the gas stove A is provided with a gas grill portion (not shown), and on the front surface of the gas stove A, a grill handle 44 for opening and closing a door (not shown) provided on the front surface of the gas grill portion and a point fire extinguishing portion of the gas grill portion are provided. A grill point fire extinguishing operation unit 43 for performing the operation is provided, and the exhaust from cooking in the gas grill unit is discharged from the 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, a trivet 50 on which a cooking container 60 heated by a stove burner (left burner 31, right burner 32) is placed is arranged. Has been done.

In the trivet 50, a plurality of trivet claws 51 for placing the cooking container 60 are arranged radially around the flame hole portion 33, and the lower ends of the respective trivet claws 51 are connected by a ring-shaped trivet ring 52. , Is placed on the top plate 02. The gas stove A includes two stoves, a left burner 31 and a right burner 32, but both the left burner 31 and the right burner 32 have the same embodiment 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.

Explaining the left burner 31 in detail, at the place where the gas burner's trivet claw 51 faces each other in the circumferential direction of the flame hole portion 33 (section S in FIG. 5), the trivet claw 51 is located in the circumferential direction of the flame hole portion 33. The flame hole portion 33 is configured so that heating by the left burner 31 is suppressed as compared with a portion that does not exist facing each other (section F in FIG. 5).

Specifically, no flame hole is formed in the portion where the trivet claw 51 in the circumferential direction of the gas burner exists facing each other (section S in FIG. 5), and the trivet claw 51 in the circumferential direction of the gas burner faces each other. The flame hole is formed only in the non-existent portion (section F in FIG. 5), and the flame hole portion 33 of the left burner 31 is configured so that the heating of the trivet 50 by the left burner 31 is suppressed.

Further, a temperature detection unit 71 is provided on the top plate 02 at a position separated from the flame hole portion 33 by a predetermined distance (60 mm in this embodiment). Specifically, as shown in FIG. 1, in a plan view. A temperature detection unit 71 made of a thermistor is arranged in the vicinity of the trivet claw 51 located in front of the left burner 31.

As shown in FIGS. 2 to 4, the temperature sensing unit 78 of the temperature detecting unit 71 is located at a position higher than the upper surface of the top plate 02 by a predetermined height dimension, specifically, from the upper surface of the top plate 02. It is located at a position slightly higher than the height of 1/2 of the height dimension (40 mm in this embodiment) to the upper end of the trivet claw 51 adjacent to the temperature detection unit 71 (27 mm from the upper surface of the top plate 02 in this embodiment). ing. As a result, the following effects can be obtained.

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

Then, as the secondary air, the air existing around the gas stove is supplied, but the air existing around the gas stove is generally exhaust that flows around the flame 81 (see the exhaust flow EF in FIG. 11). )), Since the temperature is significantly lower than the temperature of ()), when the position of the temperature sensing unit 78 of the temperature detecting unit 71 is the same as the surface of the top plate 02, the temperature detecting unit is subjected to secondary air. The temperature sensing unit 78 of the 71 may be cooled, and the temperature of the flame 81 may not be properly detected by the temperature detecting unit 71.

On the other hand, in this embodiment, when the position of the temperature sensing portion 78 of the temperature detecting unit 71 is made higher than the upper surface of the top plate 02 by the above-mentioned height dimension (27 mm in this embodiment), it is secondary. It is possible to prevent the temperature sensing unit 78 of the temperature detecting unit 71 from being excessively cooled by the air.

Further, in the gas stove A, as shown in FIGS. 1 to 5, the cooking container temperature detecting means 72 that contacts the bottom surface of the cooking container 60 such as a pot for the trivet 50 and detects the temperature of the bottom surface of the cooking container 60. However, the support shaft 73 is provided so as to penetrate the center of the left burner 31 from the bottom to the top.

The cooking container temperature detecting means 72 and the support shaft 73 move up and down in conjunction with the placement of the cooking container 60 on the trivet 50 and the upward movement of the cooking container 60 placed on the trivet 50. Move to.

Further, as shown in FIGS. 12 to 15, a magnet (permanent magnet in this embodiment) 105 is arranged (fixed) on the lower end side of the support shaft 73, and is arranged 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 arranged with its reference surface 101a facing the support shaft 73. The magnetic sensor 101 is attached to, for example, the gas stove main body 01 so as not to move with the vertical movement of the support shaft 73.

The linear output Hall IC used as the magnetic sensor 101 in this embodiment shows the relationship between the magnetic flux density (local) and the output voltage as shown in FIG. 16, and the reference surface 101a thereof. It outputs a voltage corresponding to the polarity of the magnetic flux applied crossing (see FIGS. 12 to 15) and the magnitude of the magnetic flux density.

The mounting state of the cooking container 60, the magnetic flux density B on 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 detecting means 74. The relationships are shown in Table 1.

In this embodiment, the magnetic flux formed from the north pole to the south pole of the magnet 105 with the north pole side of the magnet (permanent magnet) 105 facing the reference surface 101a of the magnetic sensor (linear output hole IC) is generated. 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 flux) when the magnetic flux intersects the magnetic sensor 101 from the back surface side of the reference surface 101a of the magnetic sensor 101 is defined as negative (minus).

Further, as shown in FIGS. 12 to 15, a magnet 105 is fastened to the lower end side of the support shaft 7 so as to face the magnetic sensor 101 with its north pole facing upward and its south pole facing downward. There is.

Then, as shown in FIG. 12, when the cooking container 60 is not placed on the trivet 50, the upper end of the cooking container temperature detecting means (pot bottom sensor) 72 is located above the upper end of the trivet 50.

At this time, the magnet 105 anchored to the support shaft 73 is located 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 becomes −20 mT <B ≦ 0. , The output A of the magnetic sensor (linear output Hall IC) is 2.1V <A ≦ 2.5V. At this time, the control unit is configured such that the cooking container placement detecting means 74 detects the non-placement of the cooking container 60 on which the cooking container 60 is not placed on the trivet 50.

More specifically, the magnetic sensor 101 detects the vertical movement of the support shaft 73, and the cooking container temperature detecting means 72, the support shaft 73, the magnet 105 fastened to the support shaft 73, and the magnetic sensor 101 make the Gotoku 50. It is configured so that the presence or absence of the cooking container 60 placed on the cooking container 60 and the shape of the bottom surface of the cooking container 60 can be detected.

That is, in the gas stove A of this embodiment, the magnet 105 anchored to the support shaft 73 and the magnetic sensor 101 arranged in the vicinity thereof constitute the cooking container mounting detection means 74 for 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 Gotoku 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 becomes 2.1 V <A ≦ 2.5 V. At this time, the control unit included in the gas table stove A is configured to detect the non-placement of the cooking container 60.

Further, as shown in FIG. 13, when the cooking container 60 having a flat bottom surface is placed on the Gotoku 50, the upper end of the cooking container temperature detecting means 72 is located at substantially the same height as the upper end of the Gotoku 50. The south pole of the magnet 105 anchored to the support shaft 73 is located at a height facing the reference plane of the magnetic sensor (linear output Hall IC) and intersects the reference plane 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 ≦ 2.1 V. At this time, the control unit included in the gas table stove A is configured to detect the first state in which the cooking container 60 is placed.

Further, as shown in FIG. 14, in a state where a cooking container 60 such as a Chinese pot having a convex surface whose bottom surface projects downward is placed on the Gotoku 50, the cooking container temperature detecting means 72 (pot bottom sensor). ) Is located at a height lower than the upper end of the Gotoku 50, and at this time, the north pole of the magnet 105 anchored to the support shaft 73 faces the reference surface 101a of the magnetic sensor (linear output Hall IC) 101. The magnetic flux density B located at the height and 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 unit included in the gas table stove A is configured to detect the second state in which the cooking container 60 is placed.

Further, as shown in FIG. 15, the outer diameter of the cooking container 60 in a plan view is smaller than the outer diameter of the region surrounded by the tips of the plurality of Gotoku claws 51, and the cooking container 60 is not on the Gotoku 50. In the state of being fitted into the area surrounded by the tip of the Gotoku 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 in which the cooking container 60 is placed, as shown in FIG. Is located at a lower height, and at this time, the north pole of the magnet 105 anchored to the support shaft 73 is located at a height lower than the reference surface 101a of the magnetic sensor 101, and the reference surface 101a of the magnetic sensor 101 is located. The magnetic flux (magnetic flux density) B intersecting with is 0 <B <20 mT, and the output A of the magnetic sensor 101 is 2.5 V <A <2.9 V. At this time, the control unit included in the gas table stove A is configured to detect the third state in which the cooking container 60 is placed.

That is,
(1) As shown in FIG. 12, the cooking container 60 is not placed on the Gotoku 50, and the south pole of the magnet 105 anchored to the support shaft 73 is higher than the reference surface 101a of the magnetic sensor 101. The magnetic flux (magnetic flux density) B that intersects the reference plane of the magnetic sensor 101 is −20 mT <B ≦ 0, and the output A of the magnetic sensor (linear output Hall IC) is 2.1 V <A ≦. When the voltage is 2.5 V, the control unit included in the gas table magnet A detects that the cooking container 60 is not placed.

(2) Further, as shown in FIG. 13, a cooking container 60 having a flat bottom surface is placed on the Gotoku 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 located and intersecting 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 unit included in the gas table magnet A detects the first state in which the cooking container 60 is placed.

(3) Further, as shown in FIG. 14, a cooking container 60 such as a Chinese pot whose bottom surface is convex downward is placed on the Gotoku 50, and the north pole of the magnet 101 is the reference of the magnetic sensor 101. The magnetic flux (magnetic flux density) B located at a height facing the surface 101a and intersecting 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 included in the gas table magnet A detects the second state in which the cooking container 60 is placed.

(4) Further, as shown in FIG. 15, the outer diameter of the cooking container 60 in a plan view is smaller than the outer diameter of the area surrounded by the tips of the plurality of Gotoku claws 51, and the cooking container 60 is above the Gotoku 50. Instead, in the state where it is fitted in the area surrounded by the tip of the Gotoku claw 51, the north pole of the magnet 105 is located at a height lower than the reference plane 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. At this time, the control unit included in the gas table magnet A detects the third state in which the cooking container 60 is placed.

In the gas stove A of this embodiment, the relative position of the magnetic pole of the magnet 105 anchored to the support shaft 73 and one magnetic sensor (linear output hole IC) arranged to face the support shaft 73 side changes. Depending on the polarity and magnitude of the magnetic field (magnetic flux density) applied to one magnetic sensor (linear output hall IC) arranged so as to face the support shaft 73 side, the control unit is placed in the cooking container 60. It is configured to determine the state of the height position of the cooking container temperature detecting means 72, which changes according to the above, and detect a plurality of mounting states of the cooking container 60, and it is only necessary to include one magnetic sensor 101. , It becomes possible to reduce the manufacturing cost by reducing the number of steps for assembling the gas stove.

Next, the 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 thermal power of the left burner 31 to the first thermal power (2.97 kW in this embodiment) or more for a predetermined time (15 seconds in this embodiment). When the temperature detected by the temperature detection unit 71 is equal to or lower than the predetermined threshold temperature SH, the outer diameter of the cooking container 60 such as a pot placed on the trivet 50 is the first, as shown in FIG. Since it can be determined that the flame 81 is smaller than the outer diameter commensurate with the thermal power, the flame 81 protrudes outside the bottom surface of the cooking container 60, and the flame 81 is deflected upward from the surface of the top plate 02. The control unit executes the thermal power reduction control for reducing the thermal power of the left burner 31 to the second thermal power (1.39 kW in this embodiment).

However, if the control unit detects the second state in which the cooking container 60 such as a wok having a convex surface whose bottom surface protrudes downward is detected on the trivet 50, the heating power reduction control is executed. do not.

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

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 can be obtained.

That is, when it is preferable to cook with high heat as in the case of cooking with a wok, it is possible to prevent cooking failure due to the reduction of heat by the control unit.

Moreover, the outer diameter of the cooking container 60 in a plan view is smaller than the outer diameter of the area surrounded by the tips of the plurality of trivet claws 51, and the cooking container 60 is surrounded by the tips of the trivet claws 51, not on the trivet 50. In the state of being fitted in the specified area, 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 detection temperature by 71 is stored as the detection temperature at the time of combustion stop, and the detection temperature at the time of combustion stop + the predetermined rising temperature determination threshold (6.5K in this embodiment) is used as the threshold temperature SH.

Then, by executing the heat reduction control, the flame 81 protrudes outside the bottom surface of the cooking container 60, that is, the flame 81 is deflected upward from the surface of the top plate 02 as shown in FIG. When the flame 81 does not protrude outside the bottom surface of the cooking container 60, that is, as shown in FIG. 4, the handle of the cooking container is generated by the high-temperature combustion exhaust from the flame 81. It is possible to prevent or prevent the user from being overheated or being exposed to high temperature by inadvertently approaching the flame protruding from the bottom surface of the cooking container.

If the user tries to change the thermal power by operating the left point fire extinguishing operation unit 41 while the thermal power reduction control is being executed, the control unit will change the thermal power because the user intentionally tries to change the thermal power. According to the intention of the user, the opening degree of the gas amount adjusting valve is adjusted to change the thermal power of the left burner 31. That is, even during the execution of the thermal power reduction control, the thermal power change command by the operation of the left point fire extinguishing operation unit 41 is received, and the thermal power is changed.

On the other hand, based on the operation of the left point fire extinguishing operation unit 41 by the user, the control unit sets 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 (15 seconds in this embodiment). ) If the temperature detected by the temperature detection unit 71 is higher than the predetermined threshold temperature SH when continuous combustion is performed, the outer diameter of the cooking container 60 placed on the trivet 50 becomes the first thermal power. It is determined that the outer diameter is equal to or larger than the outer diameter, 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 container 60, as shown in FIG. Since it can be done, the control unit maintains the thermal power of the left burner 31 to be equal to or higher than the first thermal power. That is, the thermal power reduction control that reduces the thermal power of the left burner 31 to the second thermal power is not executed.

Further, in this embodiment, when the cooking container mounting detecting means 74 detects the mounting of the cooking container 60 such as a pot and the left burner 31 is used for heating, the cooking container is placed. When the detection means 74 detects that the cooking container 60 is not placed, the cooking container absence control reduces 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. Is configured to prevent the user from being exposed to the large flame 81 from the left burner 31 in the absence of the cooking container 60.

Then, when the cooking container placement detecting means 74 detects the placement (first state or second state) of the cooking container 60 during the execution of the cooking container absence control, the cooking container absence control is terminated and the cooking container absence control is terminated. It is configured to release the reduction of the thermal power of the left burner 31 to the third thermal power and return it to the thermal power before the execution of the cooking container absence control.

In addition, the state in which the cooking container placement detecting 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 executed by the execution of the thermal power reduction control. When the thermal power is reduced to the second thermal power, the cooking container placement detecting means 74 detects the placement (first state) of the cooking container 60 after the execution of the cooking container absence control, and ends the cooking container absence control. The control unit is configured to control the thermal power of the left burner 31 as follows according to the elapsed time until the operation.

(A) The state in which the cooking container placement detecting 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 executed by the execution of the thermal power reduction control. When the heating power is reduced from the first heating power or higher to the second heating power, the cooking container non-existence control is executed by the detection of the non-placement of the cooking container 60 by the cooking container mounting detection means 74, and the left burner 31 After a lapse of time within a predetermined set time (30 seconds in this embodiment) after reducing the cooking power of the cooking container to the third heating power, the cooking container mounting detecting means 74 places the cooking container 60 (first state). ) Is detected, the execution of the heating power reduction control is maintained, only the cooking container non-existence control is terminated, and only the reduction of the heating power of the left burner 31 to the third heating power is released, and the heating power is changed to the second heating power. Return to.

(B) On the other hand, the state in which the cooking container placement detecting 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 reduced. When the heating power is reduced from the first heating power or higher (for example, DkW) to the second heating power by executing the control, the cooking container does not exist due to the detection of the non-placed cooking container 60 by the cooking container mounting detecting means 74. After a time longer than a predetermined set time (30 seconds in this embodiment) elapses after the control is executed to reduce the thermal power of the left burner 31 to the third thermal power, the cooking container mounting detection means 74 uses the cooking container. When the placement of 60 (first state) is detected, the cooking container absence 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. The reduction of the thermal power of the burner 31 to the second thermal power is released, and the thermal power is returned to the thermal power equal to or higher than the first thermal power (for example, DkW).

With this configuration, the state in which the cooking container placement detecting 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 the thermal power. When the heating power is reduced from the first heating power or higher to the second heating power by executing the reduction control, the cooking container non-existence control is executed by detecting the non-mounting of the cooking container 60 by the cooking container mounting detecting means 74. 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 detecting means 74 detects the placement (first state) of the cooking container 60 after the elapsed time, the flame 81 does not inadvertently protrude outside the bottom surface of the cooking container 60. It is easy to use, and the cooking container placement detection means is used after a time longer than a predetermined set time (30 seconds in this embodiment) has elapsed, such as (2) when the cooking container 60 has been replaced. When 74 detects the placement of the cooking container 60 (first state), the heating power of the left burner 31 is once returned to the heating power equal to or higher than the first heating power (for example, DkW) to match the first heating power. When the cooking container 60 has an outer diameter, the operation for returning the cooking power from the second heating power to the large heating power becomes unnecessary.

Next, the processing in the control unit of the thermal power control of the left burner 31 in the gas stove A of this embodiment will be described below using a flowchart.

FIG. 6 is a flowchart of a subroutine related to storage processing of the detection temperature when combustion is stopped in the control unit.
First, it is determined whether or not combustion has been performed with the burner after shipment (# 101), and if combustion has never been performed with the burner after shipment, the detection temperature of the temperature detection unit 71 is detected when combustion is stopped. It is updated and stored as a temperature (# 102).
If combustion has been performed in the burner after shipment in # 101, it is determined whether the combustion stop in the burner continues for 1 hour or more (# 103), and the combustion stop in the burner is 1 hour. If the above is continued, the detection temperature of the temperature detection unit 71 is updated and stored as the detection temperature when combustion is stopped (# 102).
If the combustion stop at the burner is not continued for 1 hour or more in # 103, the combustion stop detection temperature is not updated (returns and the storage process of the combustion stop detection temperature ends).

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

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

Next, it is determined whether or not the burner thermal power continues to be the first thermal power or higher for 15 seconds or longer (# 202). When the burner thermal power continues for 15 seconds or longer for the first thermal power or more, it is determined whether or not the detection temperature of the temperature detection unit 71 ≥ the threshold temperature SH (# 203).

When the detection temperature of the temperature detection unit 71 does not equal to the threshold temperature SH, it is determined whether or not the cooking container mounting detection means 74 has detected the second state of mounting (# 205). If the cooking container mounting detecting means 74 does not detect the second state of mounting, the burner thermal power is reduced to the second thermal power (# 204) and returned.

In # 202, when the burner thermal power does not continue for 15 seconds or more from the first thermal power, in # 203, when the detection temperature of the degree detection unit ≥ the threshold temperature SH, and in # 205, the cooking container mounting detection means. If 74 has detected the second state of placement, it returns as it is.

Supplementally, in the subroutine shown in FIG. 7, it is not determined which mounting state other than the second mounting state of the cooking container mounting detecting means 74 is detected, and the cooking container mounting detecting means 74 is not determined. Regardless of which mounting state other than the second mounting state is detected, the thermal power reduction control that reduces the burner thermal power to the second thermal power (# 204) is executed according to the conditions shown in the figure. Will be done.

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

First, it is determined whether or not the cooking container placement detecting means 74 has detected the placement of the cooking container 60 (# 401). When the cooking container placement detecting 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 executed and the thermal power is being reduced to the second thermal power, the thermal power reduction flag = 1 is set (# 403), and the process returns.
If the cooking container placement detecting means 74 does not detect the placement of the cooking container 60 in # 401, the process returns.
If the thermal power reduction control is being executed in # 402 and the thermal power is not reduced to the second thermal power, the current thermal power is stored as the thermal power D when the cooking container is placed, and the thermal power reduction flag = 0 is set (# 404), and the return. To do.

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

FIG. 10 is a flowchart of a subroutine relating to the termination process of the cooking container absence control.

First, it is determined whether or not the cooking container placement detecting means 74 has detected the change from non-placement to placement of the cooking container 60 (# 501).

When the cooking container placement detecting means 74 detects the change from the non-placed cooking container 60 to the placed cooking container 60, it is determined whether or not the thermal power reduction flag = 1 (# 502). When the heating power reduction flag = 1, it is determined whether or not the elapsed time from the reduction to the third heating 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 thermal power by the absence control of the cooking container> the predetermined time L, the thermal power reduction control is terminated, the thermal power reduction flag is set to 0 (# 506), and the thermal power is stored. When the cooking container is placed, it is returned to the thermal power D (# 507) and returned.

If the cooking container placement detecting means 74 does not detect the change from non-placement to placement of the cooking container 60 in # 501, the process returns as it is.

If the thermal power reduction flag = 1 in # 502, the thermal power is returned to the stored thermal power D when placed in the cooking container (# 503) and returned. In # 504, if the elapsed time from the reduction to the third thermal power by the absence control of the cooking container> the predetermined time L is not satisfied, the thermal power is returned to the second thermal power, the thermal power reduction flag = 1 is maintained, and the return is performed.

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

In the above embodiment, the magnet (permanent magnet) 105 is fastened to the support shaft 73, and the magnetic sensor (linear output hall IC) 101 is moved vertically along the support shaft 73. Although it was configured to be attached to the gas stove body 01 in a manner that does not move with it, a magnetic sensor (linear output hole IC) 101 was fixed to the support shaft 73, and a magnet (permanent magnet) 105 was placed in the vicinity of the magnetic sensor. It is also possible to configure so as to provide. 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.

Further, in the above embodiment, the linear output Hall IC is used as the magnetic sensor 101, but a Hall element may be used instead of the linear output Hall IC. However, while the linear output Hall IC has a built-in amplifier that amplifies the output of the Hall element, when 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 can be done, it is easily affected by external noise, so it is desirable to consider whether to use a Hall element depending on the situation.

Further, in the above embodiment, a permanent magnet is used as the magnet 105, but it is also possible to use an electromagnet as the magnet instead of the permanent magnet.

Further, in the above embodiment, the detection temperature of the temperature detection unit 71 when the left burner 31 continues to stop combustion for a predetermined stop time (1 hour in this embodiment) is stored as the detection temperature at the time of combustion stop. As the predetermined threshold temperature SH, the predetermined threshold temperature SH = the detection temperature at the time of combustion stop + the predetermined rising temperature determination threshold (6.5 K in this embodiment) is used. On the other hand, the comparative temperature is detected at a position (for example, a position 250 mm from the flame hole 33) further away from the predetermined distance (60 mm in the above embodiment) from the flame hole 33 of the left burner 31 to the temperature detection unit 71. A comparison temperature detection unit that is provided with a unit 77 (see FIG. 17) and is obtained by setting the threshold temperature SH = the detection temperature of the comparison temperature detection unit 77 + the rising temperature determination threshold (for example, 6.5K) as a predetermined threshold temperature SH. It is also possible to use the temperature obtained by adding the threshold for determining the rising temperature to the temperature detected by 77.

As described above, when the comparison temperature detection unit 77 is provided and the predetermined threshold temperature SH is set to the temperature detected by the comparison temperature detection unit 77 plus the predetermined rise temperature determination threshold, the gas stove Even if the ambient temperature of the stove fluctuates, it will be possible to accurately determine whether or not a cooking container with a smaller diameter than the cooking container suitable for the first thermal power is placed on the trivet, and at the same time, it will be the first thermal power. It is possible to prevent an erroneous judgment due to a change in ambient temperature as to whether or not a cooking container having a diameter smaller than that of a matching cooking container is placed on the trivet.

Even in the case of a gas stove equipped with a plurality of gas burners, the above-mentioned comparison temperature detection unit does not need to be provided for each of the plurality of gas burners, and only one is provided for the entire stove, which may lead to an increase in cost. Absent.

In the case of this configuration, the thermal power reduction control is executed based on the flowchart shown in FIG. Since the flowchart of FIG. 8 merely replaces the detection temperature at the time of combustion stop in the flowchart of FIG. 7 with the detection temperature of the comparison temperature detection unit 77, detailed description thereof will be omitted.

Further, in the above embodiment, the case where the present invention is applied to the gas table stove has been described, but the present invention can also be applied to the built-in stove. Further, the number of gas burners provided in the gas stove is not limited to two, and the present invention can be applied to one gas stove and three or more gas stoves.

Further, in the above embodiment, the flame hole is not formed in the portion of the gas burner facing the trivet claw 51, and the flame hole portion 33 is present at the location of the trivet claw 51 in the circumferential direction of the flame hole portion 33. The heating by the left burner 31 was suppressed as compared with the non-existent part of the trivet claw 51 in the circumferential direction of the gas burner, but compared with the pitch between the adjacent flame holes in the region not facing the trivet claw 51 of the gas burner. By widening the pitch between the flame holes adjacent to each other in the region of the gas burner facing the trivet claw 51, the trivet claw 51 is not present in the circumferential direction of the flame hole portion 33 at the location where the trivet claw 51 exists. It is also possible to configure the left burner 31 to suppress heating as compared with the existing location.

Further, in the above embodiment, when the user intentionally changes the thermal power during the execution of the thermal power reduction control, the thermal power change command by the operation of the point fire extinguishing operation unit is performed even during the execution of the thermal power reduction control. Is accepted and the thermal power is changed, but it is also possible to configure so that the thermal power increase command by the point fire extinguishing operation unit during the execution of the thermal power reduction control is not accepted.

It should be noted that it is also possible to configure so as to notify that the thermal power increase command has been issued by an alarm sound by the thermal power increase command by the point fire extinguishing operation unit during the execution of the thermal power decrease control.

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

A gas stove (gas table stove)
AF Secondary air flow EF Exhaust flow around the flame F Where the trivet claws do not exist S Where the trivet claws exist facing each other 01 Gas stove body 02 Top plate 31 Left burner (stove burner)
32 Right burner (stove burner)
33 Flame hole 41 Left point fire extinguishing operation unit 42 Right point fire extinguishing operation unit 43 Grill point fire extinguishing operation unit 44 Grill handle 45 Grill exhaust port 50 Gotoku 51 Gotoku claw 52 Gotoku ring 60 Cooking container 71 Temperature detection unit 72 Cooking container temperature detection means 73 Support shaft 74 Cooking container mounting detection means 77 Comparison temperature detection unit 78 Temperature detection unit temperature sensing unit 81 Flame 101 Porcelain sensor (linear output hall IC)
101a Reference plane of porcelain sensor 105 Magnet (permanent magnet)

Claims (8)

An annular stove burner provided so that a flame hole formed on the outer periphery thereof protrudes above the top plate through a burner opening formed in the top plate on the upper surface of the gas stove body.
A control unit that controls the point fire extinguishing and thermal power of the stove burner based on the operation of the point fire extinguishing operation unit.
A gas stove with a trivet and a plurality of trivet claws arranged around the flame hole of the stove burner and supporting a cooking container heated by the stove burner.
A temperature detection unit arranged at a predetermined distance from the flame hole portion on the top plate, and a temperature detection unit.
A cooking container temperature detecting means that is vertically urged and supported by the upper end of a support shaft that extends vertically through the center of the stove burner in a plan view.
When the cooking container is placed above the stove burner and the cooking container temperature detecting means abuts on the bottom surface of the cooking container and is pushed down, the cooking container is placed at the cooking position by detecting this. It is equipped with a cooking container placement detection means to detect that.
Wherein detection by the cooking container placement置検detecting means state, and (1) a flat cooking container bottom is placed on the trivet, depression amount of the cooking vessel temperature detecting means in a state of being supported by the trivet claws, ( 2) The cooking container in a state where a cooking container having a convex surface whose bottom surface protrudes downward is placed on the trivet and the lower end of the cooking container reaches below the area surrounded by the plurality of the trivet claws. The amount of pushing down of the temperature detecting means and (3) a cooking container having a flat bottom surface and a diameter smaller than the area surrounded by the plurality of the trivet claws is placed on the trivet and by the tip of the trivet claw. The detection state is different depending on the amount of pushing down of the cooking container temperature detecting means in the state of being fitted in the enclosed area.
The control unit is the first state in which the flat-bottomed cooking container is placed on the Gotoku (1), and the cooking container (2) in which the bottom surface is a convex surface protruding downward. Is placed in the Gotoku, and the pushing down amount of the cooking container temperature detecting means is larger than the pushing down amount of the cooking container temperature detecting means in the first state, and the second state (3). A cooking container having a flat bottom surface and a smaller bottom diameter than the area surrounded by the Gotoku claws is placed so as to fit into the area surrounded by the tips of the Gotoku claws. It is configured to detect a third state in which the pushing down amount of the container temperature detecting means is a pushing down amount larger than the pushing down amount of the cooking container temperature detecting means in the second state.
When the thermal power of the stove burner is equal to or higher than the predetermined first thermal power for a predetermined time and the detection temperature of the temperature detection unit is equal to or lower than the predetermined threshold temperature, the control unit
(A) When the first state is detected, a thermal power reduction control for reducing the thermal power of the stove burner to a predetermined second thermal power smaller than the predetermined first thermal power is executed.
(B) When the second state is detected, the heating power reduction control is not executed, and the heating power of the stove burner is maintained at a heating power equal to or higher than the predetermined first heating power.
(C) A gas stove characterized in that it is configured to execute the thermal power reduction control when the third state is detected. The detection temperature of the temperature detection unit when the control burner continues to stop combustion for a predetermined stop time or longer is stored as the detection temperature at the time of combustion stop, and the predetermined threshold temperature is set as the detection temperature at the time of combustion stop. The gas stove according to claim 1, wherein the temperature is set to a temperature obtained by adding a predetermined temperature rise determination threshold value to the temperature. A comparison temperature detection unit is provided at a position further away from the flame hole portion by the predetermined distance, and the predetermined threshold temperature is set to the detection temperature by the comparison temperature detection unit to a predetermined rising temperature determination threshold value. The gas stove according to claim 1, wherein the temperature is the sum of the above. The gas stove according to any one of claims 1 to 3, wherein the operation unit and the temperature detection unit are located on the front side of the flame hole portion. The trivet is formed by arranging a plurality of trivet claws for placing a cooking container radially around the flame hole portion.
At the location where the trivet claw is present in the circumferential direction of the flame hole portion, the flame hole portion is suppressed so as to suppress heating by the stove burner as compared with the location where the trivet claw is not present in the circumferential direction of the flame hole portion. Is configured, and any of claims 1 to 4, wherein the temperature detection unit is arranged in a region in the vicinity of the trivet claw in a plan view where heating by the stove burner is suppressed. The gas stove described in. Any of claims 1 to 5, wherein the temperature-sensitive portion of the temperature-sensing portion is located at a position higher than the upper surface of the top plate by a predetermined height dimension at the arrangement position of the temperature-detecting portion. The gas stove described in. The sixth aspect of claim 6, wherein the predetermined height dimension is ½ or more of the height dimension from the upper surface of the top plate to the upper end of the trivet claw at the arrangement position of the temperature detection unit. Gas stove. When the cooking container mounting detecting means detects that the cooking container is not placed during heating by the stove burner while the cooking container mounting detecting means detects the mounting of the cooking container, the control The unit executes a cooking container absence control that reduces the thermal power of the stove burner to a predetermined third thermal power smaller than the predetermined second thermal power.
When the cooking container placement detecting means detects the placement of the cooking container during the execution of the cooking container absence control, the cooking container absence control is terminated and the predetermined third of the thermal power of the stove burner. Release the reduction to firepower,
Before the execution of the cooking container absence control execution, the thermal power of the stove burner in a state where the cooking container placement detecting means detects the placement of the cooking container is reduced to the predetermined second thermal power by the execution of the thermal power reduction control. When the thermal power is increased, the control unit
(A) The cooking container non-existence control is executed by the detection of the non-placement of the cooking container by the cooking container mounting detection means to reduce the thermal power of the stove burner to the predetermined third thermal power, and then a predetermined When the cooking container placement detecting means detects the placement of the cooking container after the lapse of time within the set time, the execution of the heating power reduction control is maintained and only the cooking container absence control is terminated. Then, only the reduction of the thermal power of the stove burner to the predetermined third thermal power is released, and the thermal power is returned to the second thermal power.
(B) The cooking container non-existence control is executed by the detection of the non-placement of the cooking container by the cooking container mounting detection means to reduce the heating power of the stove burner to the predetermined third heating power, and then a predetermined When the cooking container placement detecting means detects the placement of the cooking container after a time longer than the set time has elapsed, the cooking container absence control is terminated and the predetermined number of the thermal power of the stove burner is increased. 3. Claim 1 characterized in that the reduction to the thermal power is released, and the reduction control of the thermal power is terminated to cancel the reduction of the thermal power of the stove burner to the predetermined second thermal power. The gas stove according to any one of ~ 7.

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