JP6711688B2 - Gas stove - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stove, and more particularly to a gas stove having a stove burner arranged so that a flame hole portion projects above the top plate through a burner opening formed in the top plate.

Among gas stoves used for various cooking, there is a gas stove having a stove burner arranged such that a flame hole portion projects above the top plate through a burner opening formed in the top plate.

As one of such gas stoves, in Patent Document 1, 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 point extinguishing operation And a control unit that controls the fire power of the stove burner based on the operation of the burner, and a temperature detection unit is provided on the top plate at a position apart from the flame hole by a predetermined distance. When the temperature detected by the temperature detection unit is equal to or lower than a predetermined threshold temperature when the thermal power of is equal to or higher than a predetermined first thermal power for a predetermined time, the thermal power of the stove burner is lower than the predetermined first thermal power by a predetermined value. A gas stove is disclosed that is configured to perform a thermal power reduction control that reduces to a second thermal power.

This gas stove can determine the size (pot diameter) of the pot placed on Gotoku, and the user carelessly approaches the flame protruding outside the bottom of the pot, exposing the user to high temperatures. This is significant in that the effect of preventing this can be obtained.

JP, 2013-253750, A

By the way, when cooking with a gas stove, the flame in the pot is intentionally squeezed out of the bottom of the pot, and the alcohol in the pot is ignited by the flame squeezed out of the pot bottom. There is a case where the cooking method is used. In this cooking method, alcohol such as brandy with a high scent and high alcohol content is sprayed into the cooking container near the final step of cooking, and the flame of the gas stove is ignited to blow off the alcohol content and add flavor. Is.

However, when performing the flambe using the gas stove of Patent Document 1 described above, if the flame does not protrude to the outside of the bottom of the pot, use a lighter, matcher, or other igniter to remove the flame from the igniter. It is necessary to ignite the alcohol inside, which is troublesome.

In addition, it is inconvenient when the user intentionally wants to use the gas stove with a flame protruding outside the bottom of the pot, such as when boiling water in a short time with a small pot.

The present invention is to solve the above problems, the diameter of the pot placed on Gotoku can be determined, and the user carelessly approaches the flame protruding to the outside of the pot bottom, causing the user to reach a high temperature. It is possible to prevent exposure to the sun, and it is possible to make the flame stick out to the outside of the bottom of the pan as needed, such as when performing flambe or when you want to boil hot water in a short time using a small pan. The purpose is to provide a good gas stove.

In order to solve the above problems, the gas stove of the present invention,
Through an opening for a burner formed in the top plate on the upper surface of the gas stove body, an annular stove burner provided so that the flame hole portion formed on the outer periphery thereof projects above the top plate,
A control unit that controls the point fire and the heating power of the stove burner based on the operation of the point fire operation unit,
Gokutoku, which is arranged around the flame hole portion of the stove burner and supports a cooking vessel heated by the stove burner,
A gas stove on the top plate, the temperature detecting section being arranged at a predetermined distance from the flame hole section,
When the control unit continues the thermal power of the stove burner is equal to or higher than a predetermined first thermal power for a predetermined time, the temperature detected by the temperature detection unit satisfies a thermal power reduction control execution condition that is equal to or lower than a predetermined threshold temperature. On the basis of the above, it is configured to execute 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, and
A cancellation command input unit for issuing a command to cancel execution of the thermal power reduction control,
(A) When the cancellation command is issued during execution of the thermal power reduction control, the control unit increases the thermal power of the stove burner from the predetermined second thermal power to the thermal power before execution of the thermal power reduction control. ,
(B) When the cancellation command is issued before the heat power reduction control execution condition is satisfied, the heat power reduction control is not executed even when the heat power reduction control execution condition is satisfied , and
The bottom shape of the cooking container is a convex shape that protrudes downward, or a bottom shape determining unit that determines whether it is a non-convex shape that does not protrude downward,
(1) When the cancellation command is issued during execution of the thermal power reduction control and the bottom shape determination unit determines that the bottom shape of the cooking container is the convex shape, the control unit determines The heating power of the stove burner is increased to the heating power before the execution of the heating power reduction control,
(2) When the release command is issued before the heat power reduction control execution condition is satisfied and the bottom shape determination unit determines that the bottom shape of the cooking container is the convex shape, the control unit , The thermal power reduction control is not executed even when the thermal power reduction control execution condition is satisfied,
(3) When the release command is issued during execution of the thermal power reduction control, and the bottom shape determination unit determines that the bottom shape of the cooking container is the non-convex shape, the control unit, Maintaining a state in which the heating power of the stove burner is reduced to the predetermined second heating power,
(4) When the release command is issued before the heat power reduction control execution condition is satisfied, and the bottom shape determination unit determines that the bottom shape of the cooking container is the non-convex shape, the control unit Is configured to execute the thermal power reduction control when the thermal power reduction control execution condition is satisfied .

In another gas stove of the present invention,
A cooking container temperature detecting means is supported which is urged upward to be supported by an upper end of a support shaft which is vertically inserted through the center of the stove burner in plan view and which extends vertically.
When the cooking container is placed on the Gotoku, the cooking container temperature detecting means abuts against the bottom surface of the cooking container and is pushed down, and when the cooking container temperature detecting means is pushed down, it is detected. Equipped with position detection means,
The detection state by the cooking container placement detection means, the amount of pressing down the cooking container temperature detection means when the cooking container whose bottom shape is the non-convex shape is placed on the Gotoku, and the bottom shape are Depending on the pressing amount of the cooking container temperature detecting means when the convex cooking container is placed on the Gotoku, different detection states are obtained,
The bottom shape determining unit has a first state in which a cooking container whose bottom shape is the non-convex shape is placed on the Gotoku, and a cooking container whose bottom shape is the convex shape is placed on the Gotoku. Preferably , the detected second state is detected .

Further, in the gas stove of the present invention, after the cancellation command is issued, when the predetermined time limit elapses, if the thermal power reduction control execution condition is satisfied, configured to execute the thermal power reduction control Is preferably provided.

Further, the temperature detected by the temperature detection unit when the combustor continues to stop combustion for a predetermined stop time or longer is stored as a combustion stop detection temperature, and the predetermined threshold temperature is set to the combustion stop. It is preferable that the temperature detection temperature is set to a temperature obtained by adding a predetermined threshold value for increasing temperature determination.

Further, a comparison temperature detection unit is provided at a position further apart from the position separated from the flame hole portion by the predetermined distance, and the predetermined threshold temperature is set to a temperature detected by the comparison temperature detection unit. It is preferable that the temperature be set to a temperature including a threshold for use.

Further, it is preferable that the point fire extinguishing operation section and the temperature detection section are located in front of the flame hole section.

In addition, the Gotoku is one in which a plurality of Gotoku claws for placing a cooking container are radially arranged around the flame hole portion,
At the location where the Gotoku nail is present in the circumferential direction of the flame hole section, as compared to the location where the Gotoku nail is not present in the circumferential direction of the flame hole section, the flame hole section is suppressed so that heating by the stove burner is suppressed. It is preferable that the temperature detection unit is arranged in a region near the Gokutoku nail in a plan view in which heating by the stove burner is suppressed.

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

Further, the Gotoku has a plurality of Gotoku claws for placing a cooking container arranged radially around the flame hole portion, and the predetermined height dimension is the arrangement of the temperature detection unit. It is preferable that the height from the upper surface of the top plate to the upper end of the Gotoku nail at the position is 1/2 or more of the height dimension.

Since the gas stove of the present invention is configured as described above, it is possible to determine the size (pot diameter) of the pot placed on Gotoku, and the user can see the flame protruding outside the bottom of the cooking container. Can prevent the user from approaching carelessly and be exposed to high temperatures, and if necessary, such as when performing flambe or when boiling water in a short time with a small pot. It is possible to provide a gas stove with good usability, which allows a flame to be projected to the outside of the bottom of the pan.

Further, the bottom shape of the cooking container is a convex shape that protrudes downward or a non-convex shape that does not protrude downward. When it is determined that the shape of the bottom of the cooking container is a convex shape projecting downward because the heat power control as described above (1) to (4) is performed depending on the shape of the bottom of the cooking container. Only because the fire power reduction control is released, when the release command input section is operated by mistake, the user carelessly approaches the flame protruding to the outside of the pan bottom, exposing the user to high temperatures. It is possible to prevent this and improve safety.

Further, when the requirements described in claim 2 are provided, the cooking container has a simple configuration in which the difference in the amount of pressing down of the cooking container temperature detecting means generally widely used in the gas stove is detected. It is possible to determine whether the bottom shape of the is a convex shape or a non-convex shape, and the gas stove of the present invention can be easily configured.

Further, after the cancellation command is issued, when the predetermined time limit elapses, if the thermal power reduction control execution condition is satisfied, by executing the thermal power reduction control, the pot bottom after the cancellation command is issued. Since the state where the flame protrudes to the outside does not become longer than the predetermined time limit, it is possible to ensure safety when the user forgets to operate the cancel command input unit.

Further, the temperature detected by the temperature detection unit when the burner continues to stop combustion for a predetermined stop time or longer is stored as a combustion stop time detection temperature, and a predetermined threshold temperature is detected as the combustion stop time. If the temperature is set to a temperature that has a predetermined threshold for rising temperature determination, and even if the ambient temperature around the gas stove fluctuates due to different seasons, a cooking vessel with a smaller diameter than the cooking vessel that matches the first heat It is possible to accurately determine whether or not it is placed on top, and seasonal changes in whether or not a cooking container with a diameter smaller than that of the first heat power is placed on Gotoku It is possible to prevent erroneous determination due to, and it is possible to provide a gas stove that is easy to use. Moreover, since the temperature detected by the temperature detection unit can be used as the combustion stop detection temperature, and a separate temperature detection unit for detecting the combustion stop detection temperature is not required, the cost is increased. In addition, it is useful because it can improve convenience.

Further, a comparison temperature detection unit is provided at a position further apart from the position separated from the flame hole portion by the predetermined distance, and the predetermined threshold temperature is set to a temperature detected by the comparison temperature detection unit. If the temperature is set to include the operating threshold, it is possible to accurately determine whether or not a cooking container with a diameter smaller than that of the cooking container corresponding to the first heating power is placed on Gotoku even if the ambient temperature of the gas stove fluctuates. It is possible to determine whether or not a cooking container with a diameter smaller than the one suitable for the first heat power is placed on Gotoku, and to prevent an erroneous determination due to a change in ambient temperature. Therefore, it is possible to provide a gas stove that is easy to use. Moreover, even in the case of a gas stove equipped with a plurality of gas burners, it is not necessary to provide each of the plurality of gas burners with each of the plurality of gas burners. It becomes possible to provide.

In addition, when the operation unit and the temperature detection unit are located on the front side of the flame hole portion, it is more likely that the flame does not protrude to the outside of the bottom portion of the cooking container on the front side of the flame hole portion that the user easily approaches. This makes it possible to accurately detect and more accurately prevent the user from carelessly approaching the protruding flame and exposing the user to high temperature. In the case of this configuration, even when a cooking container of a size (pot diameter) commensurate with the first heat power is placed on Gotoku with the center thereof shifted to the rear, the flame is placed outside the pot bottom. It is also meaningful in that it can be prevented from protruding.

In addition, Gotoku has a plurality of Gotoku claws for placing a cooking container radially arranged around the flame hole portion, and at the location of the Gotoku claw in the circumferential direction of the flame hole portion, the flame hole portion is formed. Compared to the non-existent position of Gotokuzume in the circumferential direction, the flame vent is configured to suppress heating by the stove burner, and the temperature detection part suppresses heating by the stove burner near the Gotokuzume in plan view. When it is configured to be arranged in the area where the temperature is detected, it is possible to suppress the temperature of the temperature detecting section from becoming excessively high, and it is possible to suppress deterioration of the temperature detecting section due to high temperature, and it is excellent in durability. It is possible to provide a gas stove that is

That is, at the location of the Gotoku nail in the circumferential direction of the flame hole portion, the flame hole portion is configured so that the heating by the stove burner is suppressed as compared with the location where the Gotoku nail is not present in the circumferential direction of the flame hole portion. By arranging the temperature detection part in the area where heating by the stove burner is suppressed near the Gokutoku nail in plan view, it is possible to prevent the temperature of the temperature detection part from becoming too high and to improve 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 is present on Gotoku, It is possible to appropriately detect the temperature of the flame formed along the top plate toward the outer side in the radial direction, and the present invention can be made more effective.

In other words, when the cooking container is present on Gotoku, 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. Secondary air for combustion flows between the flame formed along the plate and the top plate from the outer side to the inner side in the radial direction of the flame. Then, as the secondary air, the air existing around the gas stove will be 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 sensing part is at the same height as the surface of the top plate, the temperature sensing part is cooled by this secondary air, and the temperature sensing of the flame is not properly performed by the temperature sensing part. However, by raising the position of the temperature sensing part of the temperature detection part higher than the top plate by a predetermined height, it is possible to prevent the temperature detection part from being excessively cooled by the secondary air. You can

Further, in the case where the Gotoku is one in which a plurality of Gotoku claws for placing a cooking container are radially arranged around the flame hole section , the above-mentioned predetermined height of the temperature sensing section of the temperature detecting section is provided. If the size is 1/2 or more of the height from the top surface of the top plate to the upper end of the Gotoku nail at the position where the temperature detector is installed, the temperature of the flame from the flame hole can be detected more reliably. It becomes possible to do.

That is, when a pot is present on Gotoku, when the flame from the flame hole extends along the bottom of this pot and is formed along the top plate in the outer diameter direction, it is formed along the top plate. Most of the secondary air for flame combustion that flows from the outer diameter direction of the flame toward the inner diameter direction between the generated flame and the top plate has approximately the height dimension from the upper surface of the top plate to the upper end of the Gotokuzume. Since it flows in the area up to 1/2 or less in height, by setting the position of the temperature detecting part to 1/2 or more of the height dimension from the upper surface of the top plate to the upper end of the Gotokuzume, the temperature detecting part is It is possible to prevent the temperature from being excessively cooled by air and to appropriately detect the temperature of the flame.

It is a top view showing a gas stove concerning one embodiment of the present 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. FIG. 3 is an enlarged plan view of the vicinity of the left burner of the gas stove according to the embodiment of the present invention. It is a flow chart of a subroutine of thermal power control by a control part of a gas stove concerning one embodiment of the present invention. It is a flow chart of a subroutine of thermal power control by a control part of a gas stove concerning one embodiment of the present invention. It is a flow chart of a subroutine of thermal power control by a control part of a gas stove concerning one embodiment of the present invention. It is a flow chart of a subroutine of thermal power control by a control part of a gas stove concerning one embodiment of the present invention. It is a flow chart of a subroutine of thermal power control by a control part of a gas stove concerning one embodiment of the present invention. It is a side view of the gas burner periphery of the gas stove concerning one Embodiment of this invention. It is a figure which shows the state which the cooking container mounting detection means has detected the non-mounting of the cooking container in the gas stove concerning one Embodiment of this invention. It is a figure which shows the 1st state which the cooking container mounting detection means has detected mounting of the cooking container in the gas stove concerning one Embodiment of this invention. It is a figure which shows the 2nd state which the cooking container mounting detection means has detected mounting of the cooking container in the gas stove concerning one Embodiment of this invention. It is a figure which shows the structure of the additional function operation and display part with which the gas stove of this invention is equipped. It is a figure which shows the gas stove concerning another embodiment of this invention.

Hereinafter, the features of the present invention will be described in more detail by showing embodiments of the present invention.

[Embodiment]
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.

As shown in FIG. 1, in the gas stove A according to the embodiment of the present invention, the upper surface of the gas stove body 01 is covered with a top plate 02. Further, the gas stove A is equipped with two gas burners, a left burner 31 and a right burner 32, each having a cylindrical outer shape (in this embodiment, an outer diameter of 66 mm), and a burner opening (not shown) formed in the top plate 02. The flame holes 33 formed on the outer circumference of the gas burner are projected above the top plate 02 via the above.

On the front side 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 section 41 and the right burner 32 for extinguishing the point of the left burner 31 are extinguished. A right-point fire extinguishing operation unit 42 is provided for the purpose.

In addition, on the front surface of the gas stove main body 01 located on the front side of the left burner 31 and the right burner 32 in the gas table stove A, the left point fire extinguishing operation section 41 and the right burner 41 for performing the point extinguishing operation of the left burner 31 are provided. A right-point fire extinguishing operation section 42 for performing the point-extinguishing operation 32 is provided, and is not shown in the gas table stove A based on the operation of the left-point fire extinguishing operation section 41 and the right-point extinguishing operation section 42. The left and right burners 31 and 32 are controlled to be extinguished by opening/closing the gas valve and starting/stopping an igniter (not shown), and the opening degree of the gas amount adjusting valve (not shown) is controlled by driving a stepping motor (not shown). A control unit (not shown) that controls the thermal power of the left burner 31 and the right burner 32 by adjusting the amount of gas supplied to the burner 32 is provided.

Further, the gas stove A includes a gas grill portion (not shown). 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 extinguisher of the gas grill portion. A grill point extinguishing operation section 43 for performing an operation is provided, and the exhaust gas accompanying cooking in the gas grill section is configured to be exhausted from a grill exhaust port 45 provided at the rear of the top plate 02.

Around the flame holes 33 of the left burner 31 and the right burner 32 on the top plate 02, the Gotoku 50 for placing the cooking vessel 60 heated by the stove burner (the left burner 31, the right burner 32) is arranged. Has been done.

In the Gokutoku 50, a plurality of Gokutoku claws 51 for placing the cooking container 60 are radially arranged around the flame hole portion 33, and the lower ends of the respective Gokutoku claws 51 are connected by an annular Gokutoku ring 52. , Placed on the top plate 02. The gas stove A includes two burners, a left burner 31 and a right burner 32. However, since both the left burner 31 and the right burner 32 have the same form in this embodiment, , 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 location (section S in FIG. 5) where the gas burner 51 virtue claws 51 face each other in the circumferential direction of the flame hole portion 33, the virtue claw 51 does not move 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 the portion (section F in FIG. 5) that does not face each other.

Further, the temperature detecting unit 71 is provided on the top plate 02 at a position separated from the flame hole 33 by a predetermined distance (60 mm in this embodiment). Specifically, as shown in FIG. A temperature detector 71 including a thermistor is arranged near the Gotoku nail 51 located in front of the left burner 31.

As shown in FIGS. 2 to 4, the temperature sensing portion 78 of the temperature detecting portion 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 (27 mm from the top surface of the top plate 02 in this embodiment) which is slightly higher than half the height dimension (40 mm in this embodiment) to the upper end of the Gokutoku nail 51 adjacent to the temperature detecting portion 71. ing. As a result, the following effects are obtained.

When the pot is present on Gotoku, the flame 81 from the flame hole 33 extends along the bottom of the cooking container 60 and is formed outside the cooking container 60 along the top plate 02 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 outer side to the inner side in the radial direction of the flame 81. (See 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 generally flows around the flame 81 (see the exhaust flow EF in FIG. 11). Since the temperature is significantly lower than the temperature of (1), if the position of the temperature sensing portion 78 of the temperature detecting portion 71 is at the same height as the surface of the top plate 02, the temperature detecting portion 71 is heated by the secondary air. The temperature sensing unit 78 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 portion 71 is set higher than the upper surface of the top plate 02 by the above-described height dimension (27 mm in this embodiment), the secondary It is possible to prevent the temperature sensing unit 78 of the temperature detecting unit 71 from being excessively cooled by air.

Further, in this gas stove A, as shown in FIGS. 1 to 5, a cooking container temperature detecting means 72 for detecting the temperature of the bottom of the cooking container 60 by contacting the bottom of the cooking container 60 such as a pot for the Gotoku 50. However, the support shaft 73 is provided so as to penetrate the center of the left burner 31 from bottom to top. The cooking container temperature detecting means 72 and the support shaft 73 are configured to move up and down in conjunction with the placement of the cooking container 60 on the Gotoku 50.

Furthermore, the gas stove A according to this embodiment faces the first sensor (reed switch) 101, the second sensor (reed switch) 102, the first sensor 101, and the second sensor 102, as shown in FIGS. The cooking container placement detecting means 74 is provided with the permanent magnets 105 arranged as described above, and the magnetic body (magnetic shield) 110 fixed to the support shaft 73.

That is, as shown in FIGS. 12 to 14, the first sensor 101 and the second sensor 102, which constitute the cooking container placement detection means 74, are arranged vertically along the support shaft 73, and the support shaft 73 is provided. By disposing the permanent magnet 105 so as to face the first sensor 101 and the second sensor 102 with the sandwiching therebetween, and disposing the magnetic body (magnetic shield) 110 on the support shaft 73, the cooking container placement detection can be performed. Means 74 are configured.

Then, the cooking container placement detecting means 74 detects the vertical movement of the support shaft 73 as described below.

First, as shown in FIG. 12, when the cooking container 60 is not placed on the Gokutoku 50, the upper end of the cooking container temperature detecting means 72 (pot bottom sensor) is located above the upper end of the Gokutoku 50. At this time, the magnetic body (magnetic shield) 110 fixed to the support shaft 73 is located between the first sensor 101 and the permanent magnet 105, and the first sensor 101 is in the open state (OFF).

Similarly, when the upper end of the cooking container temperature detecting means 72 (pot bottom sensor) is located above the upper end of the Gotoku 50 (see FIG. 12 ), the magnetic body 110 fixed to the support shaft 73 is the second sensor 102. And the permanent magnet 105, the second sensor 102 is in an open state (OFF).

Therefore, when both of the first sensor (reed switch) 101 and the second sensor (reed switch) 102 are in the open state (OFF), the control unit (not shown) included in the gas stove A includes the cooking container 60. Detects non-placement.

In addition, as shown in FIG. 13, when the cooking container 60 having a flat bottom is placed on the Gotoku 50, the upper end of the cooking container temperature detecting means (pot bottom sensor) 72 is almost at the same height as the upper end of the Gotoku 50. At this time, the magnetic body 110 fixed to the support shaft 73 is located below between the first sensor 101 and the permanent magnet 105, and the magnetic flux (line of magnetic force) from the permanent magnet 105 is Reaching the sensor 101, the first sensor 101 is closed (ON).

Similarly, when the cooking container 60 having a flat bottom is placed on the Gotoku 50, that is, when the upper end of the cooking container temperature detecting means (pot bottom sensor) 72 is located at substantially the same height as the upper end of the Gotoku 50. The magnetic body 110 fixed to the support shaft 73 is located between the second sensor 102 and the permanent magnet 105, and the second sensor 102 is in the open state (OFF).

Therefore, when the first sensor (reed switch) is in the closed state (ON) and the second sensor (reed switch) is in the open state (OFF), the control unit (not shown) included in the gas stove A has a bottom. The first state in which the flat cooking container 60 is placed is detected.

In addition, as shown in FIG. 14, when a cooking container 60 such as a wok having a convex bottom protruding downward is placed on the Gotoku 50, the cooking container temperature detecting means 72 is provided. The upper end of the (pot bottom sensor) is located at a lower height than the upper end of the Gotoku 50, and at this time, the magnetic body 110 fixed to the support shaft 73 is located below between the first sensor 101 and the permanent magnet 105. Then, the magnetic flux (line of magnetic force) from the permanent magnet 105 reaches the first sensor 101, and the first sensor 101 is closed (ON).

Similarly, a state where a cooking container 60 such as a wok with a convex bottom is placed on the Gotoku 50, that is, the upper end of the cooking container temperature detecting means 72 (pot bottom sensor) is lower than the upper end of the Gotoku 50. When located at the height, the magnetic body 110 fixed to the support shaft 73 is located below between the second sensor 102 and the permanent magnet 105, and the second sensor (reed switch) is closed. It becomes the state (ON).

Therefore, when the first sensor (reed switch) is in the closed state (ON) and the second sensor (reed switch) is also in the closed state (ON), the control unit (not shown) included in the gas stove A is The second state in which the cooking container 60 such as a wok whose bottom has a convex shape is placed is detected.

As shown in Table 1, the gas stove A of this embodiment has
(A) As described above, when the cooking container 60 is not placed on the Gotoku 50 and both the first sensor 101 and the second sensor 102 are in the open state (OFF), the control unit included in the gas stove A. Detects the non-placement of the cooking container 60,
(B) When the first sensor 101 is in the closed state (ON) and the second sensor 102 is in the open state (OFF), the control unit included in the gas stove A places the cooking container 60 having a flat bottom on the Gotoku 50. The detected first state,
(C) Further, when both the first sensor 101 and the second sensor 102 are in the closed state (ON), the control unit included in the gas stove A has a convex shape in which the bottom shape is projected downward on the Gotoku 50. Is configured to detect the second state in which the cooking container 60 such as the wok is placed.

That is, the gas stove A includes a bottom shape determination unit that determines whether the bottom shape of the cooking container 60 is a convex shape that projects downward or a non-convex shape that does not project downward. There is.

Next, the thermal power control by the control unit will be described.
Based on the operation of the left-point extinguishing operation unit 41 by the user, the control unit causes the left burner 31 to burn the first burner (2.97 kW in this embodiment) or more for a predetermined time (15 seconds in this embodiment). ) If the temperature detected by the temperature detecting unit 71 is equal to or lower than the predetermined threshold temperature SH when continuing, the outer diameter of the cooking container 60 such as a pot placed on the Gotoku 50 matches the first thermal power. It is determined that the state is smaller than the outer diameter, 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, that is, the state shown in FIG. Then, 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, an additional function operation/display unit 34 (FIG. 15) for setting various conditions relating to control of the left burner 31 is provided on the front surface of the gas stove A, and the additional function operation/display unit 34 is provided with a heating power reduction control. A thermal power limit release switch (that is, a release command input unit for issuing a command to release the execution of the thermal power reduction control) 35 that commands the restraint of execution is provided. The release command input unit (fire power limit release switch) 35 is configured to be turned on by long pressing for 3 seconds or more. When the release command input unit (fire power limitation release switch) 35 is turned on, the heat power reduction control is not executed as in the first control mode and the second control mode described below. Is configured.

<First control mode>
(1) When the release command input unit (fire power limit release switch) 35 is turned on (pressed for 3 seconds or more) during execution of the heat reduction control, the control unit sets the fire power of the left burner 31 to a predetermined second value. The thermal power (1.39 kW in this embodiment) is increased to the thermal power before the thermal power reduction control is executed (thermal power of the first thermal power (2.97 kW in this embodiment) or more).

(2) When the release command input unit (fire power limit release switch) 35 is turned on (long press for 3 seconds or more) before the heat power reduction control execution condition is satisfied, the control unit satisfies the heat power reduction control execution condition. Does not execute the firepower reduction control.

In the case of this first control mode, it is possible to determine the size (pot diameter) of the pot placed on Gotoku, and the user carelessly approaches the flame protruding outside the bottom of the pot Can be prevented from being exposed to high temperatures, and a flame should be projected outside the bottom of the pan if necessary, such as when performing flambe or when boiling water in a small pan for a short time. It is possible to realize a gas stove that is easy to use and is easy to use.

<Second control mode>
(1) When the release command input unit (firepower limit release switch) 35 is turned on (long press for 3 seconds or more) during execution of the heat reduction control, and the bottom shape determination unit (not shown) When detecting the second state in which the cooking container 60 such as a wok having a convex bottom is placed on the Gotoku 50, the control unit controls the heating power of the left burner 31 to a predetermined value. The thermal power before the execution of the thermal power reduction control (the thermal power of the first thermal power (2.97 kW in this embodiment) or more) is increased from 2 thermal power (1.39 kW in this embodiment).

(2) The release command input unit (fire power limit release switch) 35 is turned on (long press for 3 seconds or more) before the heat reduction control execution condition is satisfied, and the bottom shape determination unit determines that the bottom shape is convex. When the second state in which the cooking container 60 such as a certain wok is placed is detected, the thermal power reduction control is not executed even when the thermal power reduction control execution condition is satisfied.

(3) The release command input unit (fire power limit release switch) 35 is turned on (press and hold for 3 seconds or more) during execution of the heat reduction control, and the bottom shape determination unit determines that the bottom shape of the cooking container 60 is not. When detecting the first state in which the convex cooking container 60 is placed, the control unit reduces the heating power of the left burner 31 to a predetermined second heating power (1.39 kW in this embodiment). Keep the condition.

(4) The release command input unit (fire power limit release switch) 35 is turned on (long press for 3 seconds or more) before the above condition for executing the heat reduction control is satisfied, and the bottom shape determining unit determines the shape of the bottom of the cooking container. When the cooking container 60 having a non-convex shape is placed and the first state in which the cooking container 60 is placed is detected, the thermal power reduction control is executed by the establishment of the thermal power reduction control execution condition. ..

In the case of this second control mode, since the execution of the thermal power reduction control is restrained only when it is determined that the bottom shape of the cooking container is a convex shape projecting downward, the release command input unit When the (fire power limitation release switch) 35 is mistakenly operated and a command to release the fire power reduction control is issued, the user inadvertently approaches the flame protruding outside the bottom of the pot and is exposed to high temperature. Therefore, the safety can be improved as compared with the case of the first embodiment described above.

In both cases of the first embodiment and the second embodiment, a predetermined time limit (3 minutes in this embodiment) has elapsed after the cancellation command input unit (thermal power restriction cancellation switch) 35 was turned on. At this time, when the above-mentioned thermal power reduction control execution condition is satisfied, the thermal power reduction control can be executed.

When the above configuration is adopted, when the release command input unit (fire power limit release switch) 35 is turned on, the state of the flame protruding to the outside of the bottom of the pot is longer than the predetermined time limit (3 minutes). Therefore, the safety is improved in the case where the user forgets to operate the cancel command input unit (fire power limit cancel switch) 35. However, the above configuration is arbitrary, and it is possible to use a gas stove that does not have the above configuration.

In addition, in the gas stove A according to this embodiment, the temperature detection unit when the left burner 31 continues to stop the combustion for a predetermined stop time (1 hour in this embodiment) or more when executing the thermal power reduction control. The temperature detected by 71 is stored as the combustion stop detection temperature, and the combustion stop detection temperature+a predetermined rising temperature determination threshold value (6.5 K in this embodiment) is used as the threshold temperature SH.

When the flame power reduction control is executed, the flame 81 sticks out from 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 is prevented from being generated and the flame 81 does not protrude to the outside of the bottom surface of the cooking container 60, that is, the state as shown in FIG. Can be suppressed or prevented from being excessively heated or being inadvertently approached by a user to a flame protruding outward from the bottom of the cooking container to be exposed to a high temperature.

When the user operates the left-point fire extinguishing operation unit 41 to change the heating power during the execution of the heating power reduction control, the control unit determines that the heating power is intentionally changed by the user. According to the user's intention, the opening amount 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, the thermal power change command by the operation of the left-point extinguishing operation unit 41 is accepted and the thermal power is changed.

On the other hand, based on the operation of the left-point extinguishing operation unit 41 by the user, the control unit causes the heating power of the left burner 31 to be the first heating 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 higher than the predetermined threshold temperature SH when the combustion is continuously performed, the outer diameter of the cooking container 60 placed on the Gotoku 50 becomes the first thermal power. It is determined to be in a state as shown in FIG. 2 in which the outer diameter is equal to or more than the commensurate outer diameter, and the flame 81 is formed along the surface of the top plate 02 without protruding outside the bottom surface of the cooking container 60. Therefore, the control unit maintains the thermal power of the left burner 31 at the thermal power of the first thermal power or higher. 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.

The processing in the control unit of the thermal power control of the left burner 31 of this embodiment will be described below using a flowchart.

FIG. 6 is a flowchart of a subroutine regarding the storage process of the combustion stop time detected temperature in the control unit.
First, it is determined whether or not the burner has been burned after shipping (#101). If the burner has never been burned after shipping, the temperature detected by the temperature detection unit 71 is detected when combustion is stopped. The temperature is updated and stored (#102).
If the burner has been burnt in #101 after shipment in #101, it is determined whether the burnout in the burner has continued for 1 hour or longer (#103), and the burnout in the burner is stopped for 1 hour. When the above continues, the temperature detected by the temperature detection unit 71 is updated and stored as the combustion stop time detected temperature (#102).
When the combustion stop in the burner is not continued for one hour or more in #103, the combustion stop time detection temperature is not updated (returns and the combustion stop time detection temperature storage processing is ended).

FIG. 7 is a flowchart illustrating processing in a subroutine relating to thermal power reduction control in the control unit.
First, the threshold temperature SH=combustion stop detection temperature+increased temperature determination threshold Δt (6.5K in this embodiment) is set (#201).
Next, it is determined whether or not the burner thermal power is above the first thermal power for 15 seconds or longer (#202). When the burner thermal power continues to be equal to or higher than the first thermal power for 15 seconds or more, it is determined whether the temperature detected by the temperature detection unit 71≧the threshold temperature SH (#203).

If the detected temperature of the temperature detection unit 71 is not equal to the threshold temperature SH, it is determined whether or not the release command input unit operation flag=1 (#205). The release command input unit operation flag will be described in detail later.

When the release command input unit operation flag is not 1 (the release command input unit operation flag is 0), the burner thermal power is reduced to the second thermal power (#204) and the process returns.
In #202, when the burner thermal power does not continue to be equal to or higher than the first thermal power for 15 seconds or more, and in #203, the detected temperature of the temperature detection unit 71 ≧threshold temperature SH, and in #205, the release command input unit operation. If the flag is 1, the process directly returns.

FIG. 9 is a flowchart of a subroutine relating to operation flag control of the cancellation command input unit (thermal power restriction cancellation switch) 35.
First, it is determined whether or not there is an operation of the release command input unit (fire power limitation release switch) 35 (ON operation by pressing the fire power limitation release switch for 3 seconds or more) (#401).
If the release command input unit (fire power limit release switch) 35 is operated (ON operation by pressing the fire power limit release switch for 3 seconds or more), it is determined whether or not the release command input unit operation flag=0. (#402).
When the release command input unit operation flag=0, the release command input unit operation flag=1 is set (#403), and the process returns.
In #401, if there is no operation of the release command input unit (fire power limitation release switch) 35 (ON operation by pressing the fire power limitation release switch for 3 seconds or more), the process returns.
If the release command input unit operation flag is not 0 in #402 (if the release command input unit operation flag is 1), the release command input unit operation flag is set to 0 (#404) and the process returns.

FIG. 10 is a flowchart of a subroutine relating to operation flag control of the cancellation command input unit (thermal power restriction cancellation switch).
First, it is determined whether or not the release command input unit operation flag=1 (#501).
When the release command input unit operation flag=1, it is determined whether or not 3 minutes have elapsed from the operation of the release command input unit (thermal power limit release switch) (#502).
When 3 minutes have elapsed since the operation of the release command input unit (fire power limit release switch), the release command input unit operation flag is changed to 0 (#503), and then the process returns.
If the cancellation command input unit operation flag is not 1 in #501, the process directly returns.
In #502, if 3 minutes have not elapsed from the operation of the cancellation command input unit (thermal power restriction cancellation switch), the process directly returns.

A description will be added to the flowchart for explaining the processing in the subroutine regarding the thermal power reduction control in the control unit in the second control mode. Although the flowchart itself for explaining the processing in the subroutine relating to the thermal power reduction control in the control unit in the second control mode is not shown, the flowchart for explaining the processing in the subroutine relating to the thermal power reduction control in the control unit in the first control mode. 7, the determination “whether the release command input unit operation flag=1” is “the release command input unit operation flag=1, and the cooking container placement detection unit is the second. Whether or not the state is detected.” is a flowchart for explaining the processing in the subroutine regarding the thermal power reduction control of the control unit in the second control mode.

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

In the above embodiment, the temperature detected by the temperature detection unit 71 when the left burner 31 continues to stop the combustion for a predetermined stop time (1 hour in this embodiment) or more is stored as the combustion stop detection temperature, As the predetermined threshold temperature SH, a predetermined threshold temperature SH=combustion stop detection temperature+a predetermined rising temperature determination threshold value (6.5K in this embodiment) is used. On the other hand, the comparative temperature detection is performed at a position (for example, a position 250 mm from the flame hole 33) farther away from a predetermined distance (60 mm in the above embodiment) from the flame hole 33 of the left burner 31 to the temperature detector 71. 16 (see FIG. 16) is provided, and as the predetermined threshold temperature SH, the comparison temperature detection unit is obtained by the following formula: threshold temperature SH=detected temperature of comparison temperature detection unit 77+increased temperature determination threshold value (for example, 6.5K). It is also possible to use a temperature obtained by adding a threshold value for temperature rise determination to the temperature detected by 77.

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 only replaces the combustion stop detection temperature in the flowchart of FIG. 7 described above 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 is also applicable to the built-in stove. The number of gas burners provided in the gas stove is not limited to two, and the present invention can be applied to a gas stove with one port and a gas stove with three ports or more.

Further, in the above-described embodiment, no flame hole is formed in the portion of the gas burner that faces the Gotoku nail 51, so that the flame hole portion 33 exists at the location of the Gotooku nail 51 in the circumferential direction of the flame hole portion 33. Although the heating by the left burner 31 is suppressed as compared with the non-existence position of the Gotokuzume 51 in the circumferential direction of the No. 5, it is compared with the pitch between adjacent flame holes in the region of the gas burner not facing the Gotokuzume 51. Then, by widening the pitch between the flame holes adjacent to each other in the region facing the Gotoku claw 51 of the gas burner, at the location of the Gotoku claw 51, the defect of the Gokutoku claw 51 in the circumferential direction of the flame hole part 33 is reduced. It is also possible to configure so that the heating by the left burner 31 is suppressed as compared with the existing portion.

Further, in the above embodiment, when the user intentionally changes the thermal power during execution of the thermal power reduction control, even when the thermal power reduction control is being executed, a command to change the thermal power by operating the point extinguishing operation unit is issued. Is configured to be accepted and the thermal power is changed, but it is also possible to configure not to accept the 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 configure that a warning sound is issued to notify that there is a heating power increase command by a heating power increase command from the point fire extinguishing operation unit during execution of the heating power reduction control.

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

A Gas table stove AF Secondary air flow EF Exhaust flow around flame F Part where Gotokuzume does not exist S S Part that Gotokuzume faces SH SH Predetermined threshold temperature 01 Gas stove main body 02 Top plate 31 Left Burner (Stove burner)
32 Right Burner (Stove Burner)
33 Flame hole 34 Additional function operation/display 35 Release command input (fire power limit release switch)
41 Left-point fire extinguishing operation part 42 Right-point extinguishing operation part 43 Grill point extinguishing operation part 44 Grill handle 45 Grill exhaust port 50 Gotoku 51 Gotoku claw 52 Gotoku ring 60 Cooking container 71 Temperature detecting part 72 Cooking container temperature detecting means 73 Support shaft 74 Cooking container placement detecting means 77 Comparative temperature detecting section 78 Temperature sensing section of temperature detecting section 81 Flame 101 First sensor 102 Second sensor 105 Permanent magnet 110 Magnetic material

Claims (9)

Through an opening for a burner formed in the top plate on the upper surface of the gas stove body, an annular stove burner provided so that the flame hole portion formed on the outer periphery thereof projects above the top plate,
A control unit that controls the point fire and the heating power of the stove burner based on the operation of the point fire operation unit,
Gokutoku, which is arranged around the flame hole portion of the stove burner and supports a cooking vessel heated by the stove burner,
A gas stove on the top plate, the temperature detecting section being arranged at a predetermined distance from the flame hole section,
When the control unit continues the thermal power of the stove burner is equal to or higher than a predetermined first thermal power for a predetermined time, the temperature detected by the temperature detection unit satisfies a thermal power reduction control execution condition that is equal to or lower than a predetermined threshold temperature. On the basis of the above, it is configured to execute 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, and
A cancellation command input unit for issuing a command to cancel execution of the thermal power reduction control,
(A) When the cancellation command is issued during execution of the thermal power reduction control, the control unit increases the thermal power of the stove burner from the predetermined second thermal power to the thermal power before execution of the thermal power reduction control. ,
(B) When the cancellation command is issued before the heat power reduction control execution condition is satisfied, the heat power reduction control is not executed even when the heat power reduction control execution condition is satisfied , and
The bottom shape of the cooking container is a convex shape that protrudes downward, or a bottom shape determining unit that determines whether it is a non-convex shape that does not protrude downward,
(1) When the cancellation command is issued during execution of the thermal power reduction control and the bottom shape determination unit determines that the bottom shape of the cooking container is the convex shape, the control unit determines The heating power of the stove burner is increased to the heating power before the execution of the heating power reduction control,
(2) When the release command is issued before the heat power reduction control execution condition is satisfied and the bottom shape determination unit determines that the bottom shape of the cooking container is the convex shape, the control unit , The thermal power reduction control is not executed even when the thermal power reduction control execution condition is satisfied,
(3) When the release command is issued during execution of the thermal power reduction control, and the bottom shape determination unit determines that the bottom shape of the cooking container is the non-convex shape, the control unit, Maintaining a state in which the heating power of the stove burner is reduced to the predetermined second heating power,
(4) When the release command is issued before the heat power reduction control execution condition is satisfied, and the bottom shape determination unit determines that the bottom shape of the cooking container is the non-convex shape, the control unit The gas stove is configured to execute the thermal power reduction control when the thermal power reduction control execution condition is satisfied . A cooking container temperature detecting means is supported which is urged upward to be supported by an upper end of a support shaft which is vertically inserted through the center of the stove burner in plan view and which extends vertically.
When the cooking container is placed on the Gotoku, the cooking container temperature detecting means abuts against the bottom surface of the cooking container and is pushed down, and when the cooking container temperature detecting means is pushed down, it is detected. Equipped with position detection means,
The detection state by the cooking container placement detection means, the amount of pressing down the cooking container temperature detection means when the cooking container whose bottom shape is the non-convex shape is placed on the Gotoku, and the bottom shape are Depending on the pressing amount of the cooking container temperature detecting means when the convex cooking container is placed on the Gotoku, different detection states are obtained,
The bottom shape determining unit has a first state in which a cooking container whose bottom shape is the non-convex shape is placed on the Gotoku, and a cooking container whose bottom shape is the convex shape is placed on the Gotoku. The detected second state and
The gas stove according to claim 1, wherein: After the release command is issued, when a predetermined time limit has passed, when the thermal reduction control execution condition is satisfied, according to claim 1, wherein performing said thermal reduction control Gas stove. The temperature detected by the temperature detector when the burner continues to stop combustion for a predetermined stop time or longer is stored as a combustion stop time detection temperature, and the predetermined threshold temperature is detected as the combustion stop time. The gas stove according to any one of claims 1 to 3 , which is configured to have a temperature obtained by adding a predetermined threshold value for increasing temperature determination 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 a temperature detected by the comparison temperature detection unit. The gas stove according to any one of claims 1 to 3 , wherein the gas stove is configured to have a temperature to which is added. The gas stove according to any one of claims 1 to 5 , wherein the point fire extinguishing operation section and the temperature detection section are located in front of the flame hole section. The Gokutoku has a plurality of Gokutoku claws for placing a cooking container radially arranged around the flame hole portion,
At the location where the Gotoku nail is present in the circumferential direction of the flame hole section, as compared to the location where the Gotoku nail is not present in the circumferential direction of the flame hole section, the flame hole section is suppressed so that heating by the stove burner is suppressed. There is constituted, in the vicinity of the trivet claws the temperature detecting unit in a plan view, any one of the preceding claims, characterized in that the heating by the stove burner is arranged in the area to be suppressed Gas stove described in. 8. The temperature sensing part of the temperature detecting part is located at a position higher than the upper surface of the top plate by a predetermined height dimension at the position where the temperature detecting part is arranged . Gas stove described in. The Gokutoku has a plurality of Gokutoku claws for placing a cooking container radially arranged around the flame hole portion,
It said predetermined height dimension, according to claim 8, wherein the the upper surface of the top plate in the installation position of the temperature detecting unit is the trivet claws 1/2 or more height to the upper end of Gas stove.

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