JP2023157368A - Cooking stove burner and gas stove - Google Patents

Abstract

To provide a cooking stove burner preventing a combustion state from being deteriorated even when boiled-over soup overflows on a burner head.SOLUTION: A cylindrical outer cylinder wall (112) is erected downward from an outer edge of a bottom face of a ceiling part (111) of a burner head (110), and a cylindrical inner cylinder wall (113) is erected downward more inside than the outer cylinder wall. A plurality of burner port grooves (112a) are formed in the lower end face of the outer cylinder wall. Peripheral projections (114) extending in the circumferential direction of the ceiling part are formed in positions more inside than the outer cylinder wall and more inside than the inner cylinder wall on the bottom face or the top face of the ceiling part of the burner head. Although small boiling over occurs more frequently than large boiling over, and small boiling over causes deformation of the burner head in a mode different from that of large boiling over, deformation at the occurrence time of small burning over can be effectively inhibited by forming the peripheral projections in the ceiling part of the burner head. With this, deterioration of a combustion state can be securely inhibited compared to a conventional method of forming projections in the radial direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to a stove burner that is mounted on a gas stove and burns a mixed gas of fuel gas and air, and a gas stove equipped with the stove burner.

A gas stove is generally used when cooking food in a cooking container. A gas stove is equipped with a stove burner, and the food in the cooking container is heated and cooked by burning fuel gas in the stove burner. The stove burner is designed to combust a mixture of fuel gas and air, and for this reason, the stove burner includes a mixing passage that mixes fuel gas with air to generate a mixed gas. The mixing passage is connected to a burner body, on which a burner head is mounted. A cylindrical wall protrudes downward from the outer periphery of the burner head, and a plurality of flame opening grooves are radially formed on the lower end surface of the cylindrical wall. When a mixed gas is supplied to the burner body from the mixing passage with the burner head placed on the burner body, multiple flames are formed between the burner body and the multiple flame grooves formed in the burner head. Mixed gas flows out of the mouth. Then, by igniting this mixed gas with a spark plug or the like, the mixed gas is combusted.

The stove burner is installed on the gas stove in the following condition. First, a top plate is installed on the top surface of the gas stove, and the top plate has an opening large enough to allow the upper part of the stove burner (that is, the upper part of the burner head and burner body) to be inserted therethrough. The stove burner is mounted below the top plate with its upper part protruding from the opening of the top plate. Further, a ring-shaped trivet is placed on the top plate so as to surround the upper part of the stove burner protruding from the opening. Therefore, by placing the cooking container on the trivet and burning the mixed gas in the stove burner, it is possible to heat and cook the food in the cooking container.

When the mixed gas is burned in the stove burner, the burner head becomes hot. Therefore, when boiling occurs during cooking, the portion of the burner head that is covered with the spilled juice is cooled and deformed. As a result, the lower end surface of the cylindrical wall of the burner head floats from the burner body, making it impossible for the mixed gas to flow out appropriately from the flame port of the burner head, resulting in poor combustion conditions. Therefore, a stove burner has been proposed in which radial protrusions are provided at multiple locations on the upper surface of the burner head to suppress deformation of the burner head and thereby suppress deterioration of the combustion state (Patent Document 1).

Japanese Patent Application Publication No. 2011-002102

However, the conventional stove burner that has been proposed has a problem in that it cannot sufficiently suppress the phenomenon in which the combustion condition worsens when spilled boiling water splashes onto the burner head.

This invention was made in order to solve the above-mentioned problems in the conventional technology, and provides a stove burner that can sufficiently suppress deterioration of the combustion state even when spilled boiling juice splashes on the burner head. The purpose is to provide

In order to solve the above-mentioned problems, the stove burner of the present invention has the following configuration. That is,
It is mounted on a gas stove and used to heat and cook food in a cooking container, and has a burner body to which a mixed gas of fuel gas and air is supplied, and a burner head placed on the burner body. Also, a stove burner that burns the mixed gas by causing the mixed gas supplied to the burner body to flow out from a plurality of flame ports formed on the outer peripheral side of the burner head,
The burner body is
an outer cylindrical body formed with an annular mounting surface on which the burner head is mounted;
an inner cylinder formed inside the outer cylinder;
The mixed gas is supplied to a space between the outer cylinder and the inner cylinder,
The burner head is
A ceiling portion formed in a disc shape or an annular shape,
a cylindrical outer wall extending downward from the outer edge of the bottom surface of the ceiling;
a cylindrical inner cylinder wall that is erected downward from the bottom surface of the ceiling part at a position inside the outer cylinder wall and that fits into the inner cylinder of the burner body;
In the stove burner, a plurality of burner opening grooves are formed on a lower end surface of the outer cylinder wall, and which penetrate the outer cylinder wall in a radial direction.
A circumferential protrusion extending in the circumferential direction of the ceiling is formed on the bottom or top surface of the ceiling of the burner head at a position inside the outer cylinder wall and outside the inner cylinder wall. It is characterized by being present.

In the stove burner of the present invention, a cylindrical outer cylinder wall is erected downward from the outer edge of the bottom surface of the ceiling of the burner head, and a cylindrical inner cylinder wall is provided inside the outer cylinder wall. is erected facing downward. Further, a plurality of flame opening grooves are formed on the lower end surface of the outer cylinder wall. Therefore, when the burner head is positioned relative to the burner body by fitting the inner cylinder wall of the burner head to the inner cylinder of the burner body, and the outer cylinder wall is placed on the mounting surface of the burner body, A plurality of burner ports are formed on the outer circumferential side of the burner head by closing the bottom surfaces of the plurality of burner port grooves. A circumferential protrusion extending in the circumferential direction of the ceiling is formed on the bottom or top surface of the ceiling of the burner head at a position inside the outer cylinder wall and outside the inner cylinder wall.

There are two types of boiling spills that occur during cooking: large boiling spills that cover a wide area, for example, nearly half of the top of the burner head, and small spills that cover a part of the top of the burner head. Therefore, small spills occur more frequently than large spills. In addition, as will be described in detail later, the manner in which the burner head is deformed by the boiling liquid is different when a large boiling liquid occurs and when a small boiling liquid occurs, and when a large boiling liquid occurs, The burner head deforms in a downwardly convex manner. On the other hand, when a small amount of boiling juice occurs, the burner head is not deformed in a way that it is warped, but the partition wall between the flame opening groove and the burner opening groove below the part where the boiling juice is splashed is causing the burner head to warp. The head deforms in such a way that it collapses in the radial direction. The deformation of the manner in which the bulkhead of the flame outlet groove collapses can be prevented by the method proposed for conventional stove burners, that is, by providing radial protrusions at multiple locations on the burner head. cannot be suppressed. As mentioned above, small boil spills occur more frequently than large boil spills, so if it is not possible to sufficiently suppress the deformation of the burner head when small boil spills occur, , there is a high probability that deterioration of the combustion state cannot be suppressed. On the other hand, in the stove burner of the present invention, the circumferential protrusion is formed on the bottom or top surface of the ceiling of the burner head, so that the deformation of the partition wall between the flame opening grooves is suppressed, and the combustion condition is controlled. deterioration can be suppressed. As a result, it becomes possible to suppress deterioration of the combustion state more reliably than the conventional stove burner.

Further, in the stove burner of the present invention described above, a radial protrusion extending in the radial direction of the ceiling is provided on the bottom or top surface of the ceiling of the burner head at a position inside the outer cylinder wall and outside the inner cylinder wall. It may also form strips.

This can also prevent the burner head from being warped or deformed in the event of a large spill. As a result, deformation of the burner head due to the occurrence of large boiling spills can be suppressed, and therefore it becomes possible to more reliably suppress deterioration of the combustion state due to boiling spills.

Furthermore, in the stove burner of the present invention described above, the burner head may be the following burner head. In other words, when the stove burner is mounted on a gas stove, the flame outlet grooves appear to be formed at a smaller density in the trivet claw opposing position where it faces the gas stove's trivet claw than in the non-opposing position where it does not face the trivet claw. It can also be used as a burner head. In such a burner head, the radial protrusion is formed in the direction toward the position facing the trivet claw, but the radial protrusion may not be formed in the direction toward the non-opposing position.

When a burner head is formed with a trivet claw facing position and a non-opposing position, the flow of mixed gas toward the trivet claw opposing position is smaller than the flow of mixed gas toward the non-opposing position. Therefore, if the radius protrusion is formed in the direction toward the trivet claw opposing position, but not in the direction toward the non-opposing position, the radius protrusion can be formed only in the portion where the mixed gas flow is small. This will form a row. Therefore, it is possible to prevent a situation in which the mixed gas becomes difficult to flow out from the flame port due to the effect of forming the radius protrusion, and the maximum thermal power of the stove burner decreases.

Furthermore, in the stove burner of the present invention described above, when the circumferential protrusion is provided to protrude downward from the bottom surface of the ceiling portion, the lower end of the circumferential protrusion may be positioned as follows. In other words, although the burner outlet groove is bored upward from the lower end surface of the outer cylinder wall, the circumferential protrusion The position of the lower end of may be set upward.

In this way, even if the circumferential protrusion is erected downward from the bottom surface of the ceiling, the flow of the mixed gas toward the flame outlet groove will not be obstructed. As a result, it is possible to prevent the maximum firepower of the stove burner from decreasing.

Furthermore, in the stove burner of the present invention described above, the burner head is formed by the lower burner head placed on the placement surface of the burner body and the upper burner head placed on the lower burner head. It's okay. The lower burner head has a cylindrical lower cylindrical wall erected downward from the outer edge of the bottom of the intermediate ceiling portion formed in an annular shape, and the lower end surface of the lower cylindrical wall includes: A plurality of lower cylinder flame opening grooves are formed that penetrate the lower cylinder wall in the radial direction. In addition, a cylindrical upper cylinder wall is erected upward from the outer edge of the upper surface of the intermediate ceiling part, and a plurality of upper cylinder walls that penetrate the upper cylinder wall in the radial direction are provided on the upper end surface of the upper cylinder wall. A flame mouth groove may also be formed. Further, the upper burner head is provided with the above-mentioned ceiling, outer cylinder wall, and inner cylinder wall, and is placed on the upper end surface of the upper cylinder wall of the lower burner head. A circumferentially extending circumferential ridge may be formed on the bottom or top surface of the ceiling of the upper burner head at a position inside the outer cylinder wall and outside the inner cylinder wall.

In this way, even in a stove burner where the burner head can be divided into an upper burner head and a lower burner head, it is possible to reliably suppress the situation where the upper burner head is deformed due to spilling water and the combustion condition worsens. It becomes possible.

In addition, in the stove burner of the present invention in which the burner head can be divided into an upper burner head and a lower burner head, when the upper burner head is placed on the lower burner head, the flame formed on the outer cylindrical wall of the upper burner head The bottom side of the mouth groove is closed by the upper end surface of the upper cylinder wall of the lower burner head, and the upper surface of the upper cylinder flame mouth groove formed in the upper cylinder wall of the lower burner head is closed by the upper end face of the upper cylinder wall of the lower burner head. It may be closed by the lower end surface of the outer cylinder wall.

In such a stove burner, the flame outlet groove formed in the outer cylinder wall of the upper burner head and the upper cylinder flame outlet groove formed in the upper cylinder wall of the lower burner head extend toward the circumferential direction of the burner head. They will be formed at alternate positions. In such a case, if a small spill occurs and the partition wall between the flame outlet grooves of the upper burner head collapses and deforms, the flame grooves of the upper burner head and the upper cylinder flame groove of the lower burner head will be damaged. Because the two gases easily connect, the combustion condition of the mixed gas deteriorates. However, even in such a stove burner, if a peripheral ridge is formed on the upper burner head, it will prevent the partition wall between the flame outlet grooves of the upper burner head from deforming in a way that it collapses when a small spill occurs. Since this can be suppressed, it is possible to suppress a situation in which the combustion state worsens.

Further, the stove burner of the present invention described above may be mounted on a gas stove.

In this way, it is possible to realize a gas stove in which the combustion state of the mixed gas does not deteriorate even if boiling occurs during cooking.

FIG. 1 is a perspective view showing the external shape of a gas stove 1 equipped with a stove burner 10 according to the present embodiment. It is an explanatory view showing the rough shape of stove burner 10 of a present example. FIG. 2 is an exploded view showing detailed shapes of the burner body 11, the lower burner head 120 placed on the burner body 11, and the upper burner head 110 placed on the lower burner head 120. FIG. 2 is an explanatory diagram showing the shapes of a peripheral protrusion 114 and a radial protrusion 115 formed on the bottom surface side of the upper burner head 110 when the upper burner head 110 of the present embodiment is viewed diagonally from below. It is an explanatory view showing the positional relationship between the radial protrusion 115 of the upper burner head 110 and the trivet claw facing position 116a by viewing the upper burner head 110 of the present embodiment from directly below. FIG. 3 is a cross-sectional view obtained by cutting the upper burner head 110 of the present embodiment in the longitudinal direction. It is an explanatory view showing the reason why the upper burner head 110 is deformed and the combustion condition deteriorates when a large boiling spill occurs. It is an explanatory view showing the reason why the upper burner head 110 is deformed and the combustion state deteriorates when a small boiling spill occurs. It is an explanatory view about upper burner head 110 of a present example provided with circumferential projection 114 of another aspect. It is an explanatory view about stove burner 10 of the 1st modification. It is an explanatory view about stove burner 10 of the 2nd modification.

FIG. 1 is a perspective view showing the external shape of a gas stove 1 equipped with a stove burner 10 of this embodiment. The gas stove 1 illustrated in FIG. 1 is a built-in type gas stove 1 that is installed by fitting into the countertop of a system kitchen (not shown), and is installed by covering a box-shaped stove body 2 and an open top surface of the stove body 2. It is equipped with a top plate 3.

Two stove burners 10 are mounted side by side inside the stove body 2, and the upper part of each stove burner 10 is in a state of protruding from an opening formed in a top plate 3. Further, a circular trivet 4 is mounted on the top plate 3 at a location where the upper part of the stove burner 10 protrudes, and from the trivet 4 there are a plurality of points (six locations in the illustrated example) toward the stove burner 10. A trivet claw 4a is extended. Therefore, by placing a cooking container such as a pot on the trivet claw 4a of the trivet 4, it is possible to heat the cooking container from below with the stove burner 10. Furthermore, the stove burner 10 has a built-in temperature sensor 5 passing through the center. The temperature sensor 5 is urged upward by a biasing spring (not shown), and the upper part of the temperature sensor 5 protrudes from the center of the upper surface of the stove burner 10. When a cooking container is placed on the trivet 4, the bottom surface of the cooking container pushes down the temperature sensor 5, and the top end of the temperature sensor 5 comes into contact with the bottom surface of the cooking container, thereby detecting the temperature of the cooking container. becomes possible.

Further, a grill door 7 is provided at the front of the gas stove 1, and a grill compartment and grill burner (not shown) are mounted behind the grill door 7. On the right side of the grill door 7, two stove operation buttons 8 are provided corresponding to the two stove burners 10, and the user of the gas stove 1 can operate either of the stove operation buttons 8 to control the operation. It is possible to ignite the stove burner 10, extinguish the fire, and adjust the firepower. Further, a grill operation button 9 is provided on the left side of the grill door 7, and by operating the grill operation button 9, the user can ignite or extinguish the grill burner, or adjust the firepower. be able to.

FIG. 2 is an explanatory diagram showing the rough shape of the cooking stove burner 10 of this embodiment. As shown in the figure, the stove burner 10 of this embodiment has a structure in which a burner head 100 made of cast metal or die cast is placed on a burner body 11 made of sheet metal. The burner body 11 is formed into a substantially cylindrical shape, and two mixing passages 11a and 11b are formed from the side. The burner head 100 is divided into an upper burner head 110 and a lower burner head 120. The lower burner head 120 is placed on the burner body 11, and the upper burner head 120 is placed on the lower burner head 120. A head 110 is placed thereon.

The outer surface of the upper burner head 110 has a substantially cylindrical shape, and a plurality of upper flame ports 110a are opened on the outer surface. Similarly, the outer surface of the lower burner head 120 also has a substantially cylindrical shape, and a plurality of upper flame ports 120a are also formed on this outer surface. Further, as will be described in detail later, a plurality of radial grooves are formed on the lower surface side of the lower burner head 120 (the side placed on the burner body 11). Therefore, when the lower burner head 120 is placed on the burner body 11, a plurality of lower flame ports 120b are opened between the lower burner head 120 and the burner body 11 as well. Further, an ignition target 120t projects from the outer surface of the lower burner head 120, and a spark plug 20 for discharging sparks toward the ignition target 120t is provided below the ignition target 120t. There is. Further, a flame detection sensor 30 is also provided at a position adjacent to the spark plug 20.

One end of the mixing passage 11a is connected to the burner body 11, and the other end is an open end 11c, and an injection nozzle (not shown) is provided at a position facing the open end 11c. Similarly, one end of the mixing passage 11b is connected to the burner body 11, but the other end is an open end 11d, and an injection nozzle (not shown) is provided at a position facing the open end 11d. A downstream gas pipe 41a is connected to the injection nozzle (not shown) at the open end 11c, and a downstream gas pipe 41b is connected to the injection nozzle (not shown) at the open end 11d. The upstream sides of the pipe 41a and the downstream gas pipe 41b are branched from one upstream gas pipe 40. A main valve 42 is interposed in the middle of the upstream gas pipe 40, a flow rate regulating valve 43a is disposed in the middle of the downstream gas pipe 41a, and a flow rate regulating valve is disposed in the middle of the downstream gas pipe 41b. 43b is interposed.

The stove burner 10 operates as follows. First, when the main valve 42 is opened, the flow rate adjustment valve 43a is closed, and the flow rate adjustment valve 43b is opened, the fuel gas from the upstream gas pipe 40 flows into the mixing passage 11b from the downstream gas pipe 41b. However, the fuel gas and air are mixed inside the mixing passage 11b to form a mixed gas. Moreover, the inside of the burner body 11 has a double structure, and the mixing passage 11b communicates with the lower burner port 120b inside the burner body 11. Therefore, when the mixed gas is supplied to the burner body 11 from the mixing passage 11b, the mixed gas flows out from the lower flame port 120b. Then, when the mixed gas flowing out from the lower flame port 120b is ignited by a spark from the ignition plug 20, combustion of the mixed gas is started at the lower flame port 120b. By adjusting the flow rate of the fuel gas with the flow rate adjustment valve 43a, the combustion thermal power of the lower flame port 120b can be adjusted.

When the flow rate control valve 43a, which had been closed until then, is opened while the mixed gas is being combusted in the lower flame port 120b, fuel gas also flows into the mixing passage 11a from the downstream gas pipe 41a, and the mixture is mixed. A mixed gas is formed inside the passageway 11a. The mixing passage 11a communicates with the upper burner port 110a and the upper burner port 120a inside the burner body 11. Therefore, when the mixed gas is supplied to the burner body 11 from the mixing passage 11b, the mixed gas flows out from the upper burner port 110a and the upper burner port 120a. When the flame resulting from combustion at the lower burner port 120b transfers to this mixed gas, combustion at the upper burner port 110a and the upper burner port 120a is started.

FIG. 3 is an exploded assembly showing detailed shapes of the burner body 11, the lower burner head 120 placed on the burner body 11, and the upper burner head 110 placed on the lower burner head 120. It is a diagram. As shown in the figure, the burner body 11 includes an outer cylindrical body 12 made of sheet metal and formed into a cylindrical shape, and an inner cylindrical body 13 made of sheet metal and formed into a cylindrical shape inside the outer cylindrical body 12. The space between the outer cylindrical body 12 and the inner cylindrical body 13 serves as a mixing chamber 15 into which the mixed gas flows. Further, a cylindrical intermediate cylinder 14 made of sheet metal is erected at a position outside the inner cylinder 13 and inside the outer cylinder 12, so that the mixing chamber 15 is The cylinder body 14 divides the chamber into a mixing chamber 15a and a mixing chamber 15b. The mixing chamber 15b communicates with the mixing passage 11b, and the mixing chamber 15a communicates with the mixing passage 11a. Further, the upper end of the outer cylinder 12 is bent obliquely downward toward the inner side in the radial direction, thereby forming an annular mounting surface 12s. Further, the upper end of the intermediate cylinder 14 is bent radially inward, and then the distal end thereof is further bent downward to form a short cylindrical positioning part 14a.

The lower burner head 120 is a substantially cylindrical member, and a cylindrical partition wall 122 is erected downward at the inner edge of an intermediate ceiling portion 121 formed in a narrow annular shape. . A cylindrical lower cylinder wall 123 is erected downward from the outer edge of the bottom side of the intermediate ceiling part 121, and a cylindrical lower wall 123 is erected upward from the outer edge of the upper side of the intermediate ceiling part 121. A cylindrical upper cylinder wall 124 is provided upright. A plurality of lower cylinder flame opening grooves 123a are formed upwardly on the lower end surface of the lower cylinder wall 123, and extend through the lower cylinder wall 123 in the radial direction. As a result, a plurality of lower burner ports 120b (see FIG. 2) are formed at positions where the plurality of lower cylinder burner port grooves 123a open on the outer peripheral side surface of the lower cylinder wall 123. Further, a plurality of upper cylinder flame opening grooves 124a are downwardly bored through the upper cylinder wall 124 in the radial direction on the upper end surface of the upper cylinder wall 124. As a result, a plurality of upper burner ports 120a are formed at positions where the plurality of upper cylinder burner port grooves 124a open on the outer peripheral side surface of the upper cylinder wall 124. Further, from the outer surface of the upper cylinder wall 124, an ignition target 120t is provided to protrude radially outward.

Such a lower burner head 120 is mounted on the burner body 11 while positioning the outer surface of the partition wall 122 with a cylindrical positioning part 14a formed at the upper end of the intermediate cylinder 14 of the burner body 11. be placed. Then, the lower end surface of the lower cylinder wall 123 erected downward from the lower burner head 120 comes into contact with the mounting surface 12s of the burner body 11. Further, when the lower burner head 120 is placed on the burner body 11, the outer portion of the partition wall 122 communicates with the mixing chamber 15b described above. Therefore, the mixed gas formed in the mixing passage 11b flows out from the lower burner port 120b of the lower burner head 120 via the mixing chamber 15b.

The upper burner head 110 is a substantially annular member, and includes an annular ceiling portion 111 in which a through hole 111a for inserting the temperature sensor 5 is formed in the center, and an outer edge portion on the bottom side of the ceiling portion 111. A cylindrical outer cylinder wall 112 erected downward, and a cylindrical inner cylinder wall 113 erected downward from the bottom surface of the ceiling part 111 at a position inside the outer cylindrical wall 112. We are prepared. The diameter of the outer cylinder wall 112 is set to be approximately the same as the diameter of the upper cylinder wall 124 of the lower burner head 120, and the lower end surface of the outer cylinder wall 112 has a hole that penetrates the outer cylinder wall 112 in the radial direction. A plurality of flame outlet grooves 112a are bored. Therefore, a plurality of upper burner ports 110a are formed at positions where the plurality of burner port grooves 112a open on the outer surface of the outer cylinder wall 112. Note that in the case of the stove burner 10 in which the temperature sensor 5 is not protruded from the through hole 111a, the through hole 111a in the ceiling portion 111 is not necessary. Therefore, in this case, the ceiling portion 111 may have a disc shape instead of an annular shape.

When placing the upper burner head 110 on the lower burner head 120, by inserting the inner cylindrical wall 113 erected from the bottom side of the ceiling part 111 into the inner cylindrical body 13 of the burner body 11, With the upper burner head 110 positioned relative to the lower burner head 120 and the burner body 11, the outer cylinder wall 112 of the upper burner head 110 is placed on the upper cylinder wall 124 of the lower burner head 120. Further, the upper tube burner outlet groove 124a bored in the upper tube wall 124 of the lower burner head 120 and the burner outlet groove 112a bored in the outer tube wall 112 of the upper burner head 110 are arranged alternately in the circumferential direction. It is drilled in a certain position. Therefore, when the lower end surface of the outer cylinder wall 112 is brought into contact with the upper end surface of the upper cylinder wall 124, the upper part of the upper cylinder flame opening groove 124a bored in the upper end surface of the upper cylinder wall 124 is A passage is formed by being closed by the lower end face of the upper cylinder wall 124, and an upper burner port 120a is formed at a position where this passage opens on the outer circumferential side of the upper cylinder wall 124. In addition, a passage is formed by closing the lower part of the flame outlet groove 112a formed in the lower end surface of the outer cylinder wall 112 with the lower end surface of the outer cylinder wall 112. An upper burner port 110a is formed at a position where it opens.

Furthermore, when the lower burner head 120 is placed on the burner body 11 and the upper burner head 110 is placed on the lower burner head 120, the inside The portion outside the cylindrical body 13 is connected to the mixing chamber 15a described above. Therefore, the mixed gas formed in the mixing passage 11a flows out from the upper burner port 110a and the upper burner port 120a via the mixing chamber 15a.

FIG. 4 is a perspective view showing the shape of the bottom surface side of the upper burner head 110 of this embodiment when viewed diagonally from below. As shown in the figure, a cylindrical inner cylinder wall 113 is erected downward from the center of the ceiling part 111 of the upper burner head 110, and a through hole 111a is formed inside the inner cylinder wall 113. ing. Further, a cylindrical outer cylinder wall 112 is erected downward from the bottom side of the outer edge portion of the ceiling part 111, and a plurality of flame outlet grooves 112a are formed radially on the lower end surface of the outer cylinder wall 112. It is formed.

Between the outer cylinder wall 112 and the inner cylinder wall 113, a circular protrusion (hereinafter referred to as a circumferential protrusion 114) coaxial with the outer cylinder wall 112 and the inner cylinder wall 113 is provided to protrude downward. Further, between the outer cylinder wall 112 and the inner cylinder wall 113, a radially extending protrusion (hereinafter referred to as a radial protrusion 115) is provided to protrude downward. In FIG. 4, it is assumed that the peripheral protrusion 114 and the radial protrusion 115 are formed on the bottom side of the ceiling portion 111. However, at least one of the peripheral protrusion 114 or the radial protrusion 115 may be formed upward from the upper surface side of the ceiling portion 111.

In this embodiment, the radius protrusion 115 is provided to protrude downward from the bottom surface of the ceiling part 111, and the radially outer end of the radius protrusion 115 is connected to the inner wall surface of the outer cylinder wall 112, and the radius The radially inner end of the protrusion 115 is connected to the outer wall surface of the inner cylinder wall 113. Therefore, the upper burner head 110 has a highly rigid structure in which the outer cylinder wall 112 and the inner cylinder wall 113 are connected at six points by the radial ridges 115.

Further, as shown in FIG. 4, the outer cylinder wall 112 has a portion where the burner outlet grooves 112a are formed at equal intervals and a portion where the burner outlet grooves 112a are not formed. The portion where the flame opening groove 112a is not formed is determined by the positional relationship with the trivet claw 4a when the stove burner 10 is mounted on the gas stove 1.

FIG. 5 is an explanatory diagram showing the upper burner head 110 of this embodiment viewed from directly below. In the figure, the position of the trivet claw 4a when the stove burner 10 is mounted on the gas stove 1 is indicated by a broken line. As described above with reference to FIG. 1, the trivet 4 of the gas stove 1 of this embodiment is equipped with six trivet claws 4a, so when the stove burner 10 is mounted on the gas stove 1, the trivet claws 4a can be viewed from six directions. This means that it extends toward the burner 10. Here, if flame ports (upper flame port 110a and upper flame port 120a) are formed at the location where the trivet claw 4a approaches, the flame formed by those flame ports will heat the trivet claw 4a instead of the cooking container. As a result, the heating efficiency of the stove burner 10 decreases. Therefore, in order to avoid a decrease in heating efficiency, when the stove burner 10 is mounted on the gas stove 1, the outer cylinder wall is The flame outlet groove 112a is not formed in the outer cylinder wall 112 at a position that does not face the trivet claw 4a (hereinafter referred to as a non-opposing position 116b). The radial protrusion 115 is not formed in the direction toward the non-opposed position 116b, but is formed in the direction toward the trivet claw facing position 116a. Further, since there are six trivet pawl opposing positions 116a, the number of radial protrusions 115 is six.

In the upper burner head 110 of this embodiment, the flame opening groove 112a is not formed at the position 116a facing the trivet claw. However, the burner opening groove 112a may also be formed at the trivet claw facing position 116a as long as the density is lower than that at the non-facing position 116b. In addition, in the stove burner 10 of this embodiment, an upper cylinder flame opening groove 124a is also formed in the lower burner head 120 at a position where it will face the trivet claw 4a when mounted on the gas stove 1 (trivet claw opposing position). (See Figure 3). However, the upper cylinder burner mouth groove 124a may also be formed at the position of the lower burner head 120 facing the trivet claw, as long as the density is lower than that of the position not facing the trivet claw 4a (non-opposing position).

FIG. 6 is a cross-sectional view obtained by cutting the upper burner head 110 in the longitudinal direction. The cutting position is the AA position shown in FIG. As shown in the figure, an outer cylinder wall 112 that extends downward from the outer edge of the ceiling portion 111 has a flame opening groove 112a formed upward from the lower end. Assuming that the height of the flame opening groove 112a is H, the lower end of the peripheral protrusion 114 is higher than the lower end of the outer cylinder wall 112 by H/2. In this embodiment, the position of the lower end of the radial protrusion 115 is the same as the position of the lower end of the circumferential protrusion 114.

By forming the above-mentioned circumferential protrusion 114 on the upper burner head 110, even if boiling occurs during cooking and the boiling liquid spills onto the upper burner head 110, the combustion state of the stove burner 10 will be maintained. It is possible to sufficiently suppress the deterioration of the The reason for this is as follows.

FIG. 7 is an explanatory diagram illustrating the reason why the combustion state of the stove burner 10 may deteriorate due to boiling liquid splashing onto the burner head 100 during cooking. In FIG. 7, the burner head 100 placed on the burner body 11 is shown in a simplified manner. Further, as described above using FIGS. 2 and 3, the burner head 100 of this embodiment includes a lower burner head 120 placed on the burner body 11 and an upper burner head placed on the lower burner head 120. 110.

FIG. 7A shows a state in which boiling liquid is spilled onto the ceiling portion 111 of the upper burner head 110 during cooking. The upper burner head 110 is at a high temperature during cooking, and the temperature of the spilled juice is lower than the temperature of the upper burner head 110, so the upper surface of the ceiling part 111 where the spilled juice is applied cools and contracts. try to. In the example shown in FIG. 7(a), since the spilled juice is applied to more than half of the left side of the ceiling part 111, the upper surface of the ceiling part 111 will contract in more than half of the left side area.

As a result, as shown in FIG. 7(b), the upper burner head 110 is deformed so as to curve downwardly. In FIG. 7B, the thick solid arrow displayed on the top surface of the ceiling portion 111 indicates that the top surface of the ceiling portion 111 is contracted. As described above, when the upper burner head 110 is deformed in such a manner that it is warped, the lower end surface 112d of the outer cylinder wall 112, which is erected downward from the upper burner head 110, is bent upwardly from the lower burner head 120. It is spaced apart from the upper end surface 124t of the cylinder wall 124. As a result, the upper burner port 110a formed in the upper burner head 110 and the upper burner port 120a formed in the lower burner head 120 are connected. In FIG. 7(b), a portion where the upper burner port 110a and the upper burner port 120a are connected is indicated by a black arrow. In such a state, the air required for combustion cannot be sufficiently supplied to the flames formed by the upper flame ports 110a and 120a, resulting in a worsening of the combustion state.

On the other hand, as described above with reference to FIGS. 4 and 5, the upper burner head 110 of the stove burner 10 of this embodiment is formed with a plurality of radial protrusions 115 extending in the radial direction. It is possible to suppress the upper burner head 110 from being warped or deformed. As a result, it is possible to prevent the combustion state from deteriorating due to the above-mentioned reasons. In addition, one end of each radius protrusion 115 is connected to the outer cylinder wall 112 and the other end is connected to the inner cylinder wall 113, so that the outer cylinder wall 112, the inner cylinder wall 113, and the radius protrusion 115 are firmly connected. Since the upper burner head 110 has a rigid frame structure, the rigidity of the upper burner head 110 is greatly increased. Therefore, deformation such as warping of the upper burner head 110 can be effectively suppressed, so that a situation where the combustion condition deteriorates can be suppressed even more effectively.

However, even if spillage occurs during cooking, it does not necessarily result in a large spill that covers nearly half (or more) of the ceiling portion 111. Rather, it is thought that small spills in which only a portion of the ceiling portion 111 is covered with boiling liquid occur more frequently than large spills. The inventor of the present application has noticed that the upper burner head 110 deforms in a different manner when a small spill occurs than when a large spill occurs. This point will be explained in detail below.

FIG. 8 is an explanatory diagram showing how the upper burner head 110 deforms when a small spill occurs. In FIG. 8 as well, the lower burner head 120 placed on the burner body 11 and the upper burner head 110 placed on the lower burner head 120 are shown in a simplified state. FIG. 8(a) shows a state in which a portion of the ceiling 111 of the upper burner head 110 is covered with boiling liquid, and FIG. 8(b) shows that the upper burner head 110 is deformed as a result. It is shown how it is done.

Even when a small amount of boiling water spills, the upper surface of the ceiling portion 111 tends to contract in the area where the spilled liquid is applied. In FIG. 8B, the thick solid arrow displayed on the top surface of the ceiling portion 111 indicates that the top surface of the ceiling portion 111 is about to contract. If the boiling liquid is applied to only a part of the ceiling part 111, contraction occurs only in a part of the ceiling part 111, so that deformation such as warping of the upper burner head 110 does not occur. Instead, as a result of the upper surface of the ceiling part 111 contracting in the area where the boiling juice has spilled, the partition wall 112b (upper flame opening) that separates the upper flame outlet 110a from the upper flame outlet 110a is below the area where the boiling juice has spilled. The remaining portion of the outer cylinder wall 112 between the upper burner head 110a and the upper burner head 110a is deformed in such a manner that it falls down in the radial direction of the upper burner head 110 (see FIG. 8(b)).

Even when the upper burner head 110 is deformed in the manner described above, the upper burner port 110a formed in the upper burner head 110 and the lower flame port 110a formed in the upper burner head 110 are The upper burner port 120a formed in the burner head 120 is connected. As a result, in such a portion, air cannot be sufficiently supplied to the flame formed by the upper flame ports 110a, 120a, and the combustion condition deteriorates.

Such deformation (deformation in which the partition wall 112b of the upper burner head 110 collapses in the radial direction) cannot be suppressed even by forming the radial protrusion 115 extending in the radial direction of the upper burner head 110. However, in the upper burner head 110 of the stove burner 10 of this embodiment, a circumferential protrusion 114 extending in the circumferential direction is formed inside the outer cylinder wall 112 (see FIGS. 4 and 5). Therefore, it is possible to suppress deformation of the partition wall 112b of the upper burner head 110 so that it falls down in the radial direction, and it is possible to suppress deterioration of the combustion state. Since the frequency of small spills is higher than the frequency of large spills, forming the circumferential protrusions 114 in the circumferential direction will reduce the amount of boiling caused by spills than if the radial protrusions 115 were formed in the radial direction. Deterioration of the combustion state can be suppressed. In addition, in the stove burner 10 of this embodiment, the radius protrusion 115 and the circumferential protrusion 114 are formed on the upper burner head 110, so that not only small boiling spills but also large boiling spills can occur. Even in such a case, it is possible to reliably suppress a situation in which the combustion condition worsens.

Further, as described above with reference to FIG. 6, the position of the lower end of the peripheral protrusion 114 is higher than the lower end of the outer cylinder wall 112 by half the height H of the flame opening groove 112a. It has become. Therefore, the flow of the mixed gas from the burner body 11 toward the flame outlet groove 112a is not obstructed by the circumferential protrusion 114, so it is possible to prevent the maximum thermal power of the stove burner 10 from decreasing.

In addition, the circumferential protrusion 114 is formed at an intermediate position between the outer cylinder wall 112 and the inner cylinder wall 113. The closer the position of the circumferential protrusion 114 is to the outer cylinder wall 112, the more the partition wall 112b can be prevented from collapsing, but on the other hand, it becomes a hindrance to the flow of the mixed gas toward the flame outlet groove 112a. Therefore, by forming the circumferential protrusion 114 at an intermediate position between the outer cylinder wall 112 and the inner cylinder wall 113, the partition wall 112b can be deformed to fall within a range that does not affect the flow of the mixed gas toward the flame outlet groove 112a. It becomes possible to suppress the

Further, as described above with reference to FIG. 5, in the stove burner 10 of this embodiment, the radial protrusion 115 is not formed in the direction of the non-opposed position 116b, but is formed in the direction of the trivet claw facing position 116a. ing. At the trivet claw opposing position 116a, the formation density of the flame outlet grooves 112a is lower than at the non-opposing position 116b, so the flow rate of the mixed gas flowing toward the non-opposing position 116b is higher than that flowing toward the trivet claw opposing position 116a. The flow rate of the mixed gas is small. Therefore, by forming the radial protrusion 115, it is possible to minimize the situation in which the flow of the mixed gas is obstructed, and therefore it is possible to prevent the maximum thermal power of the stove burner 10 from decreasing.

In addition, in the stove burner 10 of this embodiment, since the radius protrusions 115 are formed in the direction of the trivet claw opposing positions 116a, the number of the radius protrusions 115 is the number of the trivet claw opposing positions 116a (therefore, the number of the trivet claws 4a (in this embodiment, the number is limited to six). The number of radial protrusions 115 being six is not necessarily sufficient from the viewpoint of suppressing the deformation of the upper burner head 110 as shown in FIG. 7(b).

However, in the stove burner 10 of this embodiment, as shown in FIGS. 4 and 5, the radius protrusion 115 and the circumferential protrusion 114 are integrally formed. The structure is such that a circumferential protrusion 114 reinforces the portion between them. Therefore, even if the upper burner head 110 is deformed in such a manner that it is warped between the radial ridges 115 due to the gap between adjacent radial ridges 115, the deformation is prevented by the circumferential ridges. 114. As a result, even though the number of radial protrusions 115 is limited by the number of trivet pawl opposing positions 116a, it is possible to prevent the combustion condition from deteriorating due to spillage.

In addition, in the present embodiment described above, as shown in FIGS. 4 and 5, the circumferential protrusion 114 has been described as having a continuous circular shape. However, as illustrated in FIG. 9, the circumferential protrusion 114 may be divided into a plurality of parts. Even with such a peripheral protrusion 114, it is possible to suppress the deformation in which the partition wall 112b collapses in the radial direction, so it is possible to suppress the combustion condition from deteriorating when spillage occurs.

There are several variations of the stove burner 10 of this embodiment. Below, these modified examples will be briefly explained, focusing on the differences from the present embodiment.

As described above using FIG. 2 or FIG. 7 and FIG. The mouth grooves 124a are formed at alternate positions, and therefore, the upper burner port 110a of the upper burner head 110 and the upper burner port 120a of the lower burner head 120 form separate burner ports. explained. However, by forming the burner outlet groove 112a formed in the upper burner head 110 and the upper cylinder burner outlet groove 124a formed in the lower burner head 120 at positions facing each other, the upper burner outlet of the upper burner head 110 is 110a and the upper burner port 120a of the lower burner head 120 may form one burner port.

Even in the stove burner 10 of the first modification, when a small spill occurs, the partition wall 112b of the upper burner head 110 deforms in a manner such that it collapses in the radial direction, as shown in FIG. As a result, as shown by the black arrow in FIG. 10, a gap is created between the flame outlet and the adjacent flame outlet. A small amount of mixed gas also leaks out from this gap, but since the mixed gas is small and its ratio to air is low, it is difficult to burn it. Furthermore, even if the flames from the flame ports on both sides manage to cause combustion, the combustion consumes air, resulting in a shortage of air for combustion at the flame ports on both sides. For this reason, regardless of whether the mixed gas leaking from the gap is combusted or not, the combustion condition deteriorates.

However, as described above with reference to FIGS. 4 and 5, if the peripheral protrusion 114 is formed on the upper burner head 110, it is possible to suppress the deformation in which the partition wall 112b collapses when a small spill occurs. Therefore, it is possible to suppress the deterioration of the combustion state described above. In addition, by forming the radial protrusion 115, it is possible to prevent the upper burner head 110 from warping (see FIG. 7(b)), so even if a large spill occurs, the combustion state can be maintained. It becomes possible to suppress the deterioration of

Further, in the stove burner 10 of the present embodiment or the first modification described above, the burner head 100 has been described as being formed by the upper burner head 110 and the lower burner head 120. However, the stove burner 10 may be such that the burner head 100 having the same shape as the upper burner head 110 is placed on the burner body 11 without the lower burner head 120.

Even in the stove burner 10 of the second modification example, when a small spill occurs, the partition wall 112b of the burner head 100 deforms so as to collapse in the radial direction, as shown in FIG. 11. For this reason, as shown by the black arrow in the figure, a gap is created between the adjacent flame ports, and the combustion state of the mixed gas deteriorates. However, as described above with reference to FIGS. 4 and 5, if the peripheral protrusion 114 is formed on the bottom (or top) of the burner head 100, the partition wall 112b can be prevented from collapsing when a small spill occurs. Since deformation can be suppressed, it is possible to suppress the deterioration of the combustion state described above. In addition, by forming the radial protrusion 115, it is possible to prevent the burner head 100 from warping (see FIG. 7(b)), so even if a large spill occurs, the combustion state will not change. It becomes possible to suppress deterioration.

Although the present embodiment and various modified examples of the stove burner 10 have been described above, the present invention is not limited to the above embodiments and modified examples, and can be implemented in various forms without departing from the gist thereof. It is possible.

For example, in the present embodiment and the modified examples described above, the peripheral protrusion 114 and the radial protrusion 115 are erected downward from the bottom surface of the ceiling portion 111 of the upper burner head 110. However, at least one of the peripheral protrusion 114 and the radial protrusion 115 may be erected upward from the upper surface of the ceiling portion 111. Furthermore, in the present embodiment and the modified examples described above, it is assumed that the through hole 111a is formed in the center of the upper burner head 110. However, the upper burner head 110 may be an upper burner head 110 in which the through hole 111a is not formed.

1... Gas stove, 2... Stove body, 3... Top plate, 4... Trivet,
4a... trivet claw, 5... temperature sensor, 7... grill door,
8...Stove operation button, 9...Grill operation button, 10...Stove burner,
11...Burner body, 11a...Mixing passage, 11b...Mixing passage,
11c...opening end, 11d...opening end, 12...outer cylinder body, 12s...placing surface,
13...Inner cylinder body, 14...Intermediate cylinder body, 14a...Positioning part,
15...Mixing chamber, 15a...Mixing chamber, 15b...Mixing chamber,
16a... Positioning part, 20... Spark plug, 30... Flame detection sensor,
40...Upstream gas piping, 41a...Downstream gas piping,
41b...downstream gas piping, 42...main valve, 43a...flow control valve,
43b...flow control valve, 100...burner head, 110...upper burner head,
110a...Upper flame outlet, 111...Ceiling part, 111a...Through hole,
112... Outer cylinder wall, 112a... Flame outlet groove, 112b... Partition wall,
112d...lower end surface, 113...inner cylinder wall, 114...peripheral protrusion,
115... Radius protrusion, 116a... Trivet claw opposing position, 116b... Non-opposing position,
120...lower burner head, 120a...upper burner port, 120b...lower burner port,
120t...Ignition target, 121...Intermediate ceiling part, 122...Partition wall,
123...Lower cylinder wall, 123a...Lower cylinder flame outlet groove, 124...Upper cylinder wall,
124a...Upper tube flame outlet groove, 124t...Upper end surface.

Claims (7)

It is mounted on a gas stove and used to heat and cook food in a cooking container, and has a burner body to which a mixed gas of fuel gas and air is supplied, and a burner head placed on the burner body. Also, a stove burner that burns the mixed gas by causing the mixed gas supplied to the burner body to flow out from a plurality of flame ports formed on the outer peripheral side of the burner head,
The burner body is
an outer cylindrical body formed with an annular mounting surface on which the burner head is mounted;
an inner cylinder formed inside the outer cylinder;
The mixed gas is supplied to a space between the outer cylinder and the inner cylinder,
The burner head is
A ceiling portion formed in a disc shape or an annular shape,
a cylindrical outer wall extending downward from the outer edge of the bottom surface of the ceiling;
a cylindrical inner cylinder wall that is erected downward from the bottom surface of the ceiling part at a position inside the outer cylinder wall and that fits into the inner cylinder of the burner body;
In the stove burner, a plurality of burner opening grooves are formed on the lower end surface of the outer cylinder wall, and which penetrate the outer cylinder wall in the radial direction.
A peripheral protrusion extending in the circumferential direction of the ceiling part is formed on the bottom surface or the top surface of the ceiling part of the burner head at a position inside the outer cylinder wall and outside the inner cylinder wall. Conlovana is characterized by its presence. In the stove burner according to claim 1,
A radial protrusion extending in the radial direction of the ceiling portion is formed on the bottom surface or the top surface of the ceiling portion of the burner head at a position inside the outer cylinder wall and outside the inner cylinder wall. Conlovana is characterized by its presence. In the stove burner according to claim 2,
When the burner head is mounted on the gas stove, in the trivet claw facing position where it faces the trivet claw of the gas stove, the burner head has a lower position in the flame opening groove than in the non-opposed position where it does not face the trivet claw. The formation density is smaller,
The stove burner, wherein the radial protrusion is formed toward a position facing the trivet claw. In the stove burner according to claim 1,
The circumferential protrusion is provided to protrude downward from the bottom surface of the ceiling portion,
The stove burner characterized in that the lower end of the circumferential protrusion is positioned further above a position that is half the height of the burner opening groove from the lower end surface of the outer cylinder wall. The stove burner according to claim 1,
The burner head is
a lower burner head placed on the placement surface of the burner body;
an upper burner head placed on the lower burner head;
The lower burner head is
An intermediate ceiling part formed in an annular shape,
a cylindrical lower cylinder wall erected downward from an outer edge portion of the bottom surface of the intermediate ceiling portion and placed on the placement surface;
a cylindrical upper cylinder wall erected upward from the outer edge of the upper surface of the intermediate ceiling;
A plurality of lower cylinder flame opening grooves passing through the lower cylinder wall in a radial direction are formed on the lower end surface of the lower cylinder wall,
A plurality of upper cylinder flame opening grooves are formed on the upper end surface of the upper cylinder wall, and the upper cylinder flame opening grooves penetrate the upper cylinder wall in the radial direction.
The upper burner head is
It includes the ceiling part, the outer cylinder wall, and the inner cylinder wall, and is placed on the upper end surface of the upper cylinder wall of the lower burner head,
A peripheral protrusion extending in the circumferential direction of the ceiling part is formed on the bottom surface or the top surface of the ceiling part at a position inside the outer cylinder wall and outside the inner cylinder wall. Conlovana. In the stove burner according to claim 5,
When the upper burner head is placed on the lower burner head, the bottom surface of the plurality of flame opening grooves formed in the outer cylinder wall of the upper burner head is aligned with the upper end surface of the upper cylinder wall of the lower burner head. The upper surface of the plurality of upper tube flame outlet grooves formed in the upper tube wall of the lower burner head is closed by the lower end surface of the outer tube wall of the upper burner head. Conlovana is characterized by being in a closed state. A gas stove comprising the stove burner according to any one of claims 1 to 6.

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