Stove burner

Abstract

The present invention provides a stove burner that can eliminate reverse spraying and can continue cooking without performing a re-ignition operation. A mixed gas of fuel gas and air is generated in a mixing pipe and supplied to a burner main body, and the mixed gas burns at a burner port of a burner head placed on the burner main body. A flame guide is provided around an opening of the mixing pipe, and the flame guide is provided with a collision wall for the flame ejected from the opening to collide with, and a guiding wall extending from positions above and on both sides of the collision wall in the direction of the burner main body. In this way, the flame ejected due to reverse spraying is guided toward the direction of the burner main body by the collision wall and the guiding wall, so that the burner main body is heated, and the soup of the cooking liquor blocking the burner port evaporates, thereby naturally eliminating reverse spraying. In addition, since the opening of the mixing pipe is surrounded by the flame guide, there is also no risk of damage to the inside of the gas stove due to the reverse spraying flame.

Description

Technical Field

[0001] The present invention relates to a stove burner that heats and cooks food in a cooking container by burning a mixture of fuel gas and air. Background Art

[0002] Stove burners that heat and cook food in a cooking container by burning fuel gas are widely used. The stove burner has: a burner body that supplies a mixture of fuel gas and air; a burner head that has a circular ring shape and has a plurality of flame ports formed radially on its lower end surface. When the burner head is placed on the burner body, a plurality of flame ports are formed between the burner head and the placement surface of the burner body; a mixing pipe whose one end is connected to the burner body and has an opening formed at the other end; and an injection nozzle that injects fuel gas toward the opening of the mixing pipe. Moreover, when fuel gas is injected from the injection nozzle toward the opening, the injected fuel gas flows into the mixing pipe while entraining the surrounding air. The fuel gas and air are mixed inside the mixing pipe and then supplied to the burner body. The mixture of fuel gas and air supplied to the burner body is ejected from a plurality of flame ports formed between the burner body and the burner head. When the mixture is ignited, the generated flame spreads to adjacent flame ports. As a result, the mixture can start burning at all the flame ports, thereby heating and cooking the food.

[0003] In the above stove burner, if boiling over occurs during cooking, there is a case where the boiling-over soup adheres to the burner head and the burner body, thereby clogging the flame ports. In addition, if the boiling-over soup spreads along the placement surface of the burner body to a relatively distant flame port, a plurality of flame ports may be clogged. The phenomenon that the boiling-over soup spreads along the placement surface to a relatively distant flame port is particularly likely to occur when the concentration of the boiling-over soup is low. Therefore, in the case of boiling water, when the water boils over, a plurality of flame ports may also be clogged. Moreover, if a plurality of flame ports are clogged while the mixture is burning in the stove burner, there may be a phenomenon where the flame flows backward in the mixing pipe of the stove burner and flames are ejected from the opening at the end of the mixing pipe (referred to as reverse injection). When reverse injection occurs, the ejected flame burns the inside of the gas stove (for example, the back side of the top plate), and as a result, it may cause damage to the gas stove.

[0004] Therefore, the following technology has been proposed, that is, a temperature sensor is pre-mounted near the opening at the end of the mixing pipe of the stove burner. When a temperature rise is detected, it is determined that flames are ejected from the opening due to reverse injection, and the supply of fuel gas is stopped (Patent Document 1).

[0005] Prior Art Documents

[0006] Patent Document

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-028428 Summary of the Invention

[0008] Problems to be Solved by the Invention

[0009] However, in order to cope with backflow injection, a temperature sensor is mounted, and the occurrence of backflow injection is detected based on the output of the temperature sensor. When backflow injection is detected, the supply of fuel gas is stopped. Such an operation causes the flame at the burner port to disappear due to the stoppage of the fuel gas supply. Therefore, there is a cumbersome problem as follows: when one wants to continue cooking, it is necessary to perform an operation of reigniting after cleaning etc. to eliminate the blockage of the burner port.

[0010] The present invention has been completed in order to solve the above problems of the prior art, and an object thereof is to provide a stove burner that can eliminate backflow injection and can continue cooking without performing an operation of reigniting.

[0011] Solutions for Solving the Problems

[0012] In order to solve the above problems, the stove burner of the present invention adopts the following structure. That is,

[0013] A stove burner having: a mixing tube in which a mixed gas of fuel gas and air is formed; a burner main body to which the mixed gas is supplied from the mixing tube, and an annular mounting surface is formed on the upper surface of the burner main body; and a burner head having a plurality of burner port grooves formed on the lower end surface of a cylindrical tubular wall, and a plurality of burner ports opening on the outer peripheral side of the tubular wall are formed by mounting the burner head on the mounting surface of the burner main body, and the cooking object in the cooking container is heated and cooked by burning the mixed gas ejected from the plurality of burner ports.

[0014] The stove burner is characterized in that

[0015] An opening is formed at the pipe end of the mixing tube on the side not connected to the burner main body, and fuel gas flowing in from the opening is mixed with air to form a mixed gas.

[0016] The stove burner has a flame guide member, which has: a collision wall provided at a position opposite to the opening of the mixing tube, and when the flame of the mixed gas ejects from the opening, the flame collides with the collision wall; and an induction wall extending from the upper and both side positions relative to the collision wall in the direction of the burner body, guiding the flame colliding with the collision wall in the direction of the burner body.

[0017] In the stove burner of the present invention, a mixed gas of fuel gas and air is formed inside the mixing tube. By ejecting and burning the mixed gas from a plurality of fire ports formed by surrounding the mounting surface of the burner body and the fire port groove of the burner head, the cooking object in the cooking container is heated and cooked. The tube end of the mixing tube on the side not connected to the burner body becomes an opening, and the fuel gas and air flow into the mixing tube from the opening. However, when the soup or the like boiled and splashed during heating and cooking blocks the plurality of fire ports, there is a situation where a phenomenon of flame backflow occurs and the flame ejects from the opening of the mixing tube (i.e., reverse ejection). Therefore, in the stove burner of the present invention, a flame guide member is mounted on one side of the opening of the mixing tube. In this flame guide member, a collision wall for the flame ejected from the opening to collide with is provided at a position opposite to the opening, and an induction wall extending from the upper and both side positions relative to the collision wall in the direction of the burner body is also provided.

[0018] In this way, even if the plurality of fire ports are blocked by the boiled and splashed soup and reverse ejection occurs, after the flame ejected from the opening collides with the collision wall and changes direction, it can be guided in the direction of the burner body by the induction wall, thereby heating the burner body. As a result, the temperature of the mounting surface and the fire port groove of the burner head rises, promoting the evaporation of the boiled and splashed soup blocking the fire port. Therefore, the blockage of the fire port can be eliminated and normal combustion can be restored, and the reverse ejection can be naturally eliminated. In addition, the opening of the mixing tube is in a state surrounded by the collision wall and the induction wall of the flame guide member, so there is no risk of the reverse ejection flame damaging the inside of the gas stove. Moreover, even in the case of reverse ejection, the reverse ejection can be eliminated without stopping the supply of fuel gas to the fire ports (therefore in the state of continuing cooking). Therefore, in the case of continuing cooking after reverse ejection, there is no need for the following cumbersome operations: after cleaning the fire port groove and other operations to eliminate the cause of reverse ejection, igniting again and restarting the supply of fuel gas.

[0019] In addition, in the stove burner of the present invention described above, the flame guide member may be in a shape with an open lower surface.

[0020] In this way, air can be supplied from below the flame guide member toward the opening of the mixing tube. Therefore, even if the flame guide member is mounted, the amount of air supplied to the mixing tube will not be reduced, and thus a mixed gas formed by properly mixing fuel gas and air can be generated in the mixing tube.

[0021] In addition, in the stove burner of the present invention described above, the collision wall of the flame guide member may be formed parallel to the opening of the end portion of the mixing tube.

[0022] Since induction walls are formed above and on both sides of the collision wall, the air flowing into the opening of the mixing tube is mainly supplied from below the flame guide member. Therefore, if the collision wall provided at a position opposite to the opening of the mixing tube is inclined so that the lower part of the collision wall approaches the opening, the flow of air flowing into the opening of the mixing tube will be obstructed, and it will be difficult to supply an appropriate flow rate of air into the mixing tube. On the contrary, if the collision wall is inclined so that the lower part of the collision wall is away from the opening of the mixing tube, when backflow occurs and flames are ejected from the opening, the flames colliding with the collision wall are induced downward by the collision wall. As a result, there is a risk that the flames will leak out of the flame guide member and damage the gas stove. In contrast, if the collision wall of the flame guide member is formed parallel to the opening of the mixing tube in advance, the flow of air supplied to the mixing tube will not be obstructed. In addition, in the case of backflow, the flames colliding with the collision wall change direction and can be reliably induced toward the burner main body side by the induction wall. Therefore, it is also possible to prevent the situation where the flames leak out of the flame guide member and damage the gas stove. Description of the Drawings

[0023] Figure 1 It is an explanatory diagram showing the state in which the stove burner 10 of the present embodiment is mounted on the gas stove 1.

[0024] Figure 2 It is a cross-sectional view showing the structure of the stove burner 10 by cutting the stove burner 10 longitudinally at the position of the temperature sensor 18.

[0025] Figure 3 It is an explanatory diagram showing the external shape of the flame guide member 30 of the present embodiment.

[0026] Figure 4 It is an explanatory diagram showing the reason for naturally eliminating backflow by using the flame guide member 30 of the present embodiment.

[0027] Figure 5 It is an explanatory diagram showing the reason for forming the collision wall 31 parallel to the opening 15a of the mixing tube 15 in the flame guide member 30 of the present embodiment.

[0028] Figure 6It is an explanatory diagram showing the external shape of the flame guide 30 of the first modified example.

[0029] Figure 7 It is an explanatory diagram showing the external shape of the flame guide 30 of the second modified example.

[0030] Explanation of Reference Numerals

[0031] 1. Gas stove; 2. Top plate; 2a. Opening for burner; 3. Fire support; 4. Burner ring; 10. Stove burner; 11. Burner head; 11a. Cylindrical wall; 11b. Support cylinder; 11c. Main burner port groove; 11d. Auxiliary burner port groove; 12. Main burner port; 13. Auxiliary burner port; 14. Burner body; 14a. Outer peripheral wall; 14b. Inner peripheral wall; 14c. Burner body chamber; 14d. Placing surface; 15. Mixing pipe; 15a. Opening; 16. Spark plug; 17. Burner cover; 18. Temperature sensor; 19. Support column; 20. Gas pipe; 21. Injection nozzle; 30. Flame guide; 31. Collision wall; 31a. Through hole; 32. Upper wall; 33. Side wall. Detailed implementation mode

[0032] Figure 1 It is an explanatory diagram showing the state in which the stove burner 10 of the present embodiment is mounted on the gas stove 1. As shown in the figure, the gas stove 1 has a top plate 2 made of glass or metal, and an opening 2a for the burner (refer to Figure 2 ) described later is formed in the top plate 2. Moreover, the stove burner 10 is mounted in a state where the upper part thereof protrudes from the burner opening 2a. In addition, a fire support 3 is placed on the top plate 2 so as to surround the stove burner 10 protruding from the burner opening 2a, and a cooking container such as a pot can be placed on the fire support 3, thereby heating the bottom of the pot using the stove burner 10. Moreover, the gap between the burner opening 2a and the stove burner 10 is closed by the burner ring 4.

[0033] The stove burner 10 includes a burner body 14, a spark plug 16, and a burner head 11 placed on the burner body 14, etc. In addition, a relatively wide ring-shaped burner cover 17 is installed above the burner head 11, and the temperature sensor 18 is installed in a state where the upper part thereof protrudes from the through hole in the center of the burner cover 17. As described later, a mixed gas formed by mixing fuel gas and air is supplied to the inside of the burner body 14. In addition, a plurality of longitudinally long main burner ports 12 and a plurality of auxiliary burner ports 13 having an opening area smaller than that of the main burner ports 12 are opened on the cylindrical outer peripheral side surface of the burner head 11. In addition, although Figure 1In the illustrated example, the main burner ports 12 and the auxiliary burner ports 13 are formed alternately, but they do not necessarily have to be formed alternately. It is also possible to form the auxiliary burner ports 13, for example, when a predetermined number of main burner ports 12 are continuously formed. Moreover, the mixed gas in the burner body 14 is ejected from these main burner ports 12 and auxiliary burner ports 13, and the mixed gas is ignited by the spark plug 16, thereby starting combustion. The burner cover 17 has a function of preventing the soup from boiling over from the cooking appliance from entering the interior of the gas stove 1 during heating. In addition, the upper end surface of the temperature sensor 18 abuts against the bottom surface of the cooking container, and the temperature of the cooking container can be measured.

[0034] Figure 2 It is a cross-sectional view showing the structure of the stove burner 10 by cutting the stove burner 10 longitudinally at the position of the temperature sensor 18. The burner body 14 of the stove burner 10 is formed by opposing two press-formed metal plates and assembling them in an airtight state. Moreover, one metal plate constitutes the outer peripheral wall 14a, and the other metal plate constitutes the inner peripheral wall 14b, and a burner body chamber 14c is formed between the outer peripheral wall 14a and the inner peripheral wall 14b. Moreover, a mixing pipe 15 is connected to the side surface of the burner body chamber 14c.

[0035] The mixing pipe 15 is formed by opposing a part of the metal plate forming the outer peripheral wall 14a and a part of the metal plate forming the inner peripheral wall 14b and assembling them in an airtight state. The pipe end of the mixing pipe 15 on the side not connected to the burner body chamber 14c becomes an opening 15a. In addition, for the burner body 14, a mounting surface 14d having an annular shape is formed by bending the upper end portion of the outer peripheral wall 14a inward. Moreover, the burner head 11 is mounted on the mounting surface 14d.

[0036] The burner head 11 is a component in a substantially circular ring shape formed by forging or die-casting using metal materials such as aluminum alloy and brass. A cylindrical support cylinder 11b is provided to protrude downward from the inner edge portion of the circular ring shape. In addition, a cylindrical wall 11a in a cylindrical shape is provided to protrude downward from the outer edge portion of the circular ring shape. Moreover, a plurality of later-described flame ports are radially provided in the lower end surface of the cylindrical wall 11a. In addition, the flame ports are formed in a state where a deeply formed flame port (hereinafter referred to as the main flame port 11c) and a shallowly formed flame port (hereinafter referred to as the auxiliary flame port 11d) are mixed. For such a shaped burner head 11, in a state where the support cylinder 11b of the burner head 11 is fitted to the inner peripheral wall 14b of the burner body 14, the cylindrical wall 11a of the burner head 11 is placed on the placement surface 14d of the burner body 14. Then, the portion of the passage surrounded by the placement surface 14d and the main flame port 11c provided in the lower end surface of the cylindrical wall 11a that opens on the outer peripheral side surface of the cylindrical wall 11a becomes the main flame port 12. In addition, the portion of the passage surrounded by the auxiliary flame port 11d and the placement surface 14d that opens on the outer peripheral side surface of the cylindrical wall 11a becomes the auxiliary flame port 13. In Figure 2 The portion of the main flame port 11c, the portion of the auxiliary flame port 11d, and the cross-section of the cylindrical wall 11a are shown enlarged.

[0037] A relatively wide circular ring-shaped burner cover 17 is installed on the upper part of the burner head 11 using mounting fittings (not shown). Moreover, the upper part of the cylindrical temperature sensor 18 protrudes from the through-hole formed at the center position of the burner cover 17. The temperature sensor 18 is installed at the upper end of the support column 19, and the support column 19 penetrates through the center of the support cylinder 11b of the burner head 11. When a cooking container is not placed on the trivet 3, the upper end of the temperature sensor 18 protrudes above the upper surface of the trivet 3. In addition, the upper part of the burner body 14 (the portion where the placement surface 14d is formed) protrudes from the burner opening 2a opened in the top plate 2, and the gap between the burner body 14 and the burner opening 2a is closed by the circular ring-shaped burner ring 4.

[0038] A gas pipe 20 for supplying fuel gas is provided at a position facing the opening 15a at the end of the mixing pipe 15, and an injection nozzle 21 for injecting fuel gas is installed at the top end of the gas pipe 20. When fuel gas is injected into the inside of the mixing pipe 15 from the injection nozzle 21, the injected fuel gas flows into the inside of the mixing pipe 15 while entraining the surrounding air by the injector effect, and a mixed gas is formed by mixing the fuel gas and air inside the mixing pipe 15. The mixed gas thus formed passes through the burner body chamber 14c inside the burner body 14 and then is ejected from the main flame port 12 and the auxiliary flame port 13, and by igniting the mixed gas, combustion thereof is started.

[0039] Moreover, when observed from the mixing tube 15, at a position outside the opening portion 15a, a flame guide member 30 is provided in a state of surrounding the opening portion 15a with a gap therebetween relative to the opening portion 15a. The flame guide member 30 is a member made of a metal plate. At a position opposite to the opening portion 15a of the mixing tube 15, the flame guide member 30 is provided with a collision wall 31 parallel to the opening portion 15a. An upper wall 32 extends from the upper edge of the collision wall 31 toward the direction where the burner main body 14 is located. Moreover, side walls 33 also extend from both side edges of the collision wall 31 toward the direction where the burner main body 14 is located. In addition, in the present embodiment, the upper wall 32 and the side walls 33 correspond to the "inducing walls" in the present invention.

[0040] Figure 3 It represents Figure 2 FIG. is an explanatory diagram showing the external shape of the flame guide member 30 when the flame guide member 30 is observed from the direction indicated by the arrow P in FIG. For the above-described flame guide member 30, a collision wall 31 is provided at a position opposite to the opening portion 15a of the mixing tube 15. The upper end of the collision wall 31 is horizontally bent, thereby forming the upper wall 32. Moreover, both ends of the bent collision wall 31 are bent downward, thereby forming the side walls 33. The side walls 33 are in contact with the collision wall 31 without a gap therebetween. In addition, a slit-shaped through hole 31a is formed in the range from the lower end to the center of the collision wall 31. Therefore, the gas tube 20 can penetrate through the through hole 31a. As a result, the injection nozzle 21 at the top end of the gas tube 20 can face the opening portion 15a and inject fuel gas into the mixing tube 15.

[0041] In this way, the flame guide member 30 is installed in the stove burner 10 of the present embodiment in order to: even when backflow occurs in the stove burner 10 and flames are ejected from the opening portion 15a of the mixing tube 15, damage to the inside of the gas stove 1 can be avoided, and moreover, even without performing any special operation, the backflow can be naturally eliminated. The reason for achieving such an effect is as follows.

[0042] Figure 4 FIG. is an explanatory diagram conceptually showing the movement of the flame ejected from the opening portion 15a of the mixing tube 15 when backflow occurs. The thick dashed-dotted arrow in the figure indicates the movement of the flame ejected from the opening portion 15a. As shown in the figure, since the collision wall 31 exists at a position opposite to the opening portion 15a, the flame ejected from the opening portion 15a collides with the collision wall 31 and changes its direction.

[0043] Here, use Figure 2 and Figure 3As described above, the shape of the flame guide 30 is such that an upper wall 32 is formed above the collision wall 31, and side walls 33 of the flame guide 30 are formed in the left-right direction of the collision wall 31, but the lower surface of the flame guide 30 is open. Therefore, before backflow occurs, air mainly flows into the opening 15a of the mixing tube 15 from below the flame guide 30. In Figure 4 The arrow shown by the thick dashed line in

[0044] conceptually represents the flow of air from below the flame guide 30 toward the opening 15a. When backflow occurs in a state where the air flow from below toward the opening 15a is formed like this, the flame ejected from the opening 15a collides with the collision wall 31, and the collided flame does not go downward but mainly upward and in the left-right direction. Moreover, above the collision wall 31, an upper wall 32 is extended and provided in the direction where the burner main body 14 is located, and side walls 33 are also extended and provided in the direction where the burner main body 14 is located on both sides of the collision wall 31. Therefore, the flame that collides with the collision wall 31 and has its direction changed to upward is induced by the upper wall 32 toward the direction where the burner main body 14 is located. In addition, the flame that collides with the collision wall 31 and has its direction changed to the left-right direction is induced by the side walls 33 provided on both sides of the collision wall 31 toward the direction where the burner main body 14 is located. As a result, the flame ejected from the opening 15a travels along the mixing tube 15 toward the direction where the burner main body 14 is located. In Figure 4 The situation where the flame colliding with the collision wall 31 travels along the mixing tube 15 toward the direction where the burner main body 14 is located is shown by the arrow of the single dotted line in

[0045] Like this, in the stove burner 10 of this embodiment, when backflow occurs, the flame ejected from the opening 15a is induced toward the direction where the burner main body 14 is located by the flame guide 30. Therefore, the mixing tube 15 and the burner main body 14 are heated by the flame, the mounting surface 14d of the burner main body 14 is heated, and the fire port grooves 11c and 11d are also heated by the heat conduction from the mounting surface 14d. As a result, at the main fire port 12 and the auxiliary fire port 13, the evaporation of the blocked cooking liquor soup, etc. is promoted, so that the fire port is opened and the normal combustion state is restored, and thus backflow can be eliminated.

[0046] Of course, even if the backflow flame is induced toward the direction where the burner main body 14 is located, the cooking liquor soup, etc. blocking the main fire port 12 and the auxiliary fire port 13 will not evaporate immediately. Therefore, within a short period after backflow occurs, the main fire port 12 and the auxiliary fire port 13 are in a state blocked by the cooking liquor soup, etc., and backflow will continue to occur. However, as Figure 2 and Figure 3As shown, the flame guide 30 is provided in a state covering the front, upper, left, and right of the opening 15a of the mixing tube 15. Therefore, even if a flame jets out from the opening 15a, the interior of the gas stove 1 (such as the back side of the top plate 2, etc.) will not be roasted by the flame, and the gas stove 1 will not be damaged. On the other hand, the flame jetting out from the opening 15a is induced by the flame guide 30 in the direction of the burner main body 14. As a result, the evaporation of the cooking liquor and the like that clog the main burner ports 12 and the auxiliary burner ports 13 is promoted. Therefore, the clogging of the main burner ports 12 and the auxiliary burner ports 13 can be eliminated in a relatively short time, and thus backflow can also be eliminated.

[0047] In this way, in the stove burner 10 of this embodiment, even when backflow occurs, backflow can be eliminated without taking special measures, and the interior of the gas stove 1 is not damaged. In addition, even when backflow occurs, backflow can be eliminated while continuing cooking. Therefore, there is no need for the following cumbersome operations: when backflow occurs, temporarily stop the supply of fuel gas and combustion, clean the burner port groove, etc. to eliminate backflow, and then re-ignite and resume the supply of fuel gas to continue cooking.

[0048] In addition, for backflow to occur, it is not necessary for all burner ports to be clogged. When a certain proportion of the burner ports are clogged, backflow will occur. This certain proportion can be considered to be about 80%. Conversely, starting from the state where backflow has occurred, if about 20% (about 30% for safety) of all the burner ports are restored to the unclogged state, backflow can be eliminated.

[0049] In addition, in this embodiment, the collision wall 31 of the flame guide 30 is formed parallel to the opening 15a of the mixing tube 15. The reason is as follows. Figure 5 It is an explanatory diagram for the case where the collision wall 31 of the flame guide 30 is formed inclined with respect to the opening 15a of the mixing tube 15. In Figure 5 (a) shows the case where the collision wall 31 is inclined so that its lower part approaches the opening 15a. As described above, the air flowing into the mixing tube 15 from the opening 15a is mainly supplied from below. Therefore, if the collision wall 31 is inclined as shown in Figure 5 (a) so that its lower part approaches the opening 15a, the flow of air toward the opening 15a will be blocked. Therefore, when backflow does not occur, it is difficult for air to flow into the mixing tube 15, so there is a risk of hindering the generation of the mixed gas in the mixing tube 15.

[0050] In addition, in Figure 5 (b) shows the case where the collision wall 31 is inclined so that its lower part is far from the opening 15a. If the collision wall 31 is inclined as shown in Figure 5If the collision wall 31 is inclined at an angle such that the lower part of the collision wall 31 is far away from the opening 15a as shown in FIG. (b), air is easily supplied to the opening 15a. Therefore, without backflow occurring, there is no risk of hindering the generation of the mixed gas in the mixing tube 15. On the other hand, since the collision wall 31 is inclined in such a way that its lower part is far away from the opening 15a, if backflow occurs, the flame ejected from the opening 15a will be guided downward by the inclined collision wall 31. As a result, the flame leaks outside the flame guide 30 over the collision wall 31, creating a risk of damaging the inside of the gas stove 1.

[0051] In contrast, in the present embodiment, the collision wall 31 of the flame guide 30 is formed parallel to the opening 15a of the mixing tube 15. Therefore, the collision wall 31 does not hinder the flow of air from below toward the opening 15a. Thus, without backflow occurring, a mixed gas formed by mixing fuel gas and air in an appropriate ratio can be formed in the mixing tube 15. On the other hand, in the case of backflow, the flame colliding with the collision wall 31 is guided by the collision wall 31 and there is also no risk of leaking outside the flame guide 30. In addition, in order to obtain the above effects, it is not necessary for the collision wall 31 to be completely parallel to the opening 15a. It has been experimentally determined that if the angle formed with respect to the opening 15a is within the range of ±5 degrees, even if it is inclined from the parallel state, the same effect can be obtained.

[0052] In the above-described flame guide 30 of the present embodiment, the left and right side walls 33 are described as being formed parallel to each other. However, the interval between the left and right side walls 33 may also become narrower in the direction of the burner main body 14. In Figure 6 In the flame guide 30 of the first modification example illustrated in FIG., as indicated by the hatched lines in the figure, the upper wall 32 and the side walls 33 extend toward the burner main body 14, and in the extended portion, the interval between the left and right side walls 33 is formed to become narrower in the direction of the burner main body 14. In this way, after the direction of the flame colliding with the collision wall 31 is changed by the upper wall 32 and the side walls 33 to the direction of the burner main body 14, the extended portions of the left and right side walls 33 cause the flame to move closer to the center. Therefore, the flame can heat the burner main body 14 with high efficiency, and thus can quickly heat the mounting surface 14d of the burner main body 14, the main flame ports 11c and the auxiliary flame ports 11d of the burner head 11, and thus can quickly eliminate backflow.

[0053] In addition, in the above-described flame guide 30 of the present embodiment, the upper wall 32 is described as being formed in a planar shape. However, the upper wall 32 of the flame guide 30 may also be formed in a convex shape upward. In Figure 7The flame guide 30 of the second modified example in which the upper wall 32 is formed in an upward convex shape is illustrated. In Figure 7 In the example shown in (a) of Figure 7 , the upper wall 32 is formed in a curved surface shape that bulges upward. In the example shown in (b) of

[0054] , the upper wall 32 is formed in a mountain shape that bulges upward. In the flame guides 30 of these second modified examples, for the flame that is ejected from the opening 15a and collides with the collision wall 31, when the upper wall 32 changes the direction of the flame to the direction of the burner main body 14, or when the upper wall 32 makes the flame travel toward the burner main body 14, the convex upper wall 32 is used to make the flame approach the center. Therefore, similar to the above-described first modified example, the second modified example can also heat the burner main body 14 with high efficiency, and thus reverse injection can be quickly eliminated.

[0054] As described above, the stove burner 10 of the present embodiment and various modified examples have been described. However, the present invention is not limited to the above-described embodiment and various modified examples, and can be implemented in various ways without departing from the gist thereof.

Claims

1. A stove burner, comprising: a mixing tube in which a mixed gas of fuel gas and air is formed; a burner body to which the mixed gas is supplied from the mixing tube, and a circular placement surface is formed on the upper surface of the burner body; and a burner head, in which a plurality of flame ports are formed on the lower end surface of a cylindrical wall, and a plurality of flame ports opening on the outer peripheral side surface of the cylindrical wall are formed by placing the burner head on the placement surface of the burner body, and the cooking object in the cooking container is heated and cooked by burning the mixed gas ejected from the plurality of flame ports. The stove burner is characterized in that an opening is formed at the pipe end of the mixing tube on the side not connected to the burner body, and the fuel gas flowing in from the opening is mixed with air to form a mixed gas. The stove burner is provided with a flame guide member, which has: a collision wall disposed at a position opposite to the opening of the mixing tube, and when the flame of the mixed gas ejects from the opening, the flame collides with the collision wall; and an induction wall extending from positions above and on both sides of the collision wall in the direction of the burner body, and guiding the flame colliding with the collision wall in the direction of the burner body.

2. The stove burner according to claim 1, characterized in that the flame guide member has an open lower surface.

3. The stove burner according to claim 1 or 2, characterized in that the collision wall of the flame guide member is formed parallel to the opening of the end of the mixing tube.

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