JP4139008B2 - Gas grill ignition device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ignition device for igniting a burner in a gas grill.
[0002]
[Prior art]
In an ignition device used in a conventional gas grill or the like, as shown in FIG. 10, a projection-like ignition target b is provided on a wall portion a provided along a path through which gas emitted from a flame hole of a burner flows, and this ignition is performed. A spark plug c is arranged so as to face the target b, and the fuel gas emitted from the flame hole is ignited by discharging d from the spark plug c.
[0003]
[Problems to be solved by the invention]
However, in the above conventional example, the fuel gas exiting from the flame hole of the burner flows as indicated by arrow e, and the fuel gas flow is divided into two as indicated by arrow f at the protruding ignition target b. Thus, the flow of the fuel gas flowing through the tip of the ignition target b is small. For this reason, there has been a problem that the fuel gas does not easily reach the tip of the ignition target b and may not ignite.
[0004]
The present invention has been made in view of the above points, and it is an object of the present invention to provide an ignition device for a gas grill that can reliably ignite a fuel gas by reliably reaching the ignition target.
[0005]
[Means for Solving the Problems]
The gas grill ignition device according to claim 1 of the present invention for solving the above-mentioned problem is such that a tubular burner 4 is disposed in the horizontal direction at the side of the roasting chamber 3 in which the grill 2 in the grill housing 1 is installed. An ignition device for a gas grill in which a spark plug 6 and an ignition target 7 are arranged so as to sandwich a path through which fuel gas blown out from the flame hole 5 of the burner 4 passes, and fuel gas blown out from the flame hole 5 of the burner 4 A wall surface portion 10 is provided along a path along which the gas flows, and by cutting the wall surface portion 10 , the width is wide in the direction in which the flame holes 5 of the burner 4 are arranged and the fuel gas is blown out, so that it goes to the spark plug 6 side. The inclined guide surface 8 inclined in this way is provided in the path through which the fuel gas passes, and the linear edge portion of the edge of the inclined guide surface 8 on the fuel gas blowing side is formed as an ignition target 7 facing the tip of the spark plug 6. This The features. The fuel gas exiting from the flame hole 5 is guided along the inclined guide surface 8 so as to go to the linear ignition target 7, and is reliably ignited when discharged from the ignition plug 6 to the ignition target 7. Furthermore, by providing the wall surface portion 10 along the path through which the fuel gas blown out from the flame hole 5 of the burner 4 passes, even if there is a draft secondary air flow during reignition (when the grill is hot). The fuel gas blown out from the flame hole 5 of the burner 4 does not flow along the wall portion 10 and the flow of the fuel gas is kicked by the secondary air flow, and the fuel gas flows to the ignition target 7 and is reliably ignited. The Further, since the inclined guide surface 8 is formed by cutting and raising the wall surface portion 10, the inclined guide surface 8 can be easily formed and the fuel gas can be more reliably guided to the ignition target 7.
[0006]
The ignition device for a gas grill according to claim 2 of the present invention is characterized in that, in claim 1, a gap is not formed between the end of the wall surface and the burner. Since there is no gap between the end portion of the wall surface portion 10 and the burner 4, the flow of the fuel gas is guided along the wall surface portion 10, and the flow of the fuel gas is not kicked by the secondary air flow.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The overall structure of the gas grill is as shown in FIGS. The grill housing 1 that is integrated into a gas stove or the like is formed in a substantially rectangular box shape that opens the front, and includes a main body plate 1a that is integrally provided with a bottom portion 14 and side portions 15 on both sides, a rear plate 1b, The upper plate 1c and the front plate 1d having the opening 16 constitute a main body. An upper inner surface plate 17 is mounted below the upper surface plate 1c of the grill housing 1 so as to be parallel to the upper surface plate 1c with a space from the upper surface plate 1c. The upper exhaust passage 18 is between the two. Side partition plates 19 are respectively provided on the left and right sides of the grill housing 1, and the roasting chamber 3 is formed between the side partition plates 19 on both sides. Is the side hot air passage 11. In the case of this example, the lower part of the side hot air passage 11 and the lower part of the roasting chamber 3 are partitioned so as not to communicate with each other.
[0008]
Burners 4 are disposed on both the left and right sides of the grill casing 1, and an upper heating burner 4a and a lower heating burner 4b are respectively disposed on the left and right sides. The upper heating burner 4a and the lower heating burner 4b are Bunsen combustion type straight tube burners, in which a mixing tube 20 is integrally provided at the base, and a gas nozzle is supplied to the base of the mixing tube 20 from the gas cock side. The fuel gas is supplied from the gas nozzle so that the primary air for combustion is sucked and the fuel gas and the primary air are mixed in the mixing pipe 20. The upper heating burner 4a is disposed horizontally in the front-rear direction at the lower part of the side hot air passage 11, and the lower heating burner 4b is parallel to the upper heating burner 4a at the lower part of the side of the roasting chamber 3. It is arranged to become. An intake port 21 for sucking secondary air for combustion is provided below the side hot air passage 11 and below the side surface portion 15. An internal partition plate 22 is continuously led out from the side partition plate 19 into the roasting chamber 3, and a burner storage space 23 is provided between the internal partition plate 22 and the side partition plate 19. A lower heating burner 4 b is disposed in the burner storage space 23, and the lower heating burner 4 b faces the opening 24 of the internal partition plate 22. An intake port 25 is provided in the bottom surface portion 14 below the burner storage space 23 so that combustion secondary air can be sucked from the intake port 25 and taken into the burner storage space 23. Combustion secondary air can be supplied substantially horizontally between the upper and lower edges of the opening 24 and the lower heating burner 4b. The upper heating burner 4a is perforated with a flame hole 5 so as to inject the flame F upward, and the lower heating burner 4b is perforated with a flame hole 5 so as to inject the flame F in the horizontal direction. It is. A large number of such flame holes 5 are formed at equal intervals in the longitudinal direction of the upper heating burner 4a and the lower heating burner 4b.
[0009]
The rear plate 1b of the grill housing 1 is integrally provided with an exhaust tube 27 in the vertical direction, and an exhaust port 12 is provided at the lower portion of the rear plate 1b. The exhaust port 12 and the exhaust tube 27 are communicated with each other. It is. The lower end of the exhaust tube 27 is provided with an inclined surface 28 that goes down as it goes forward. An auxiliary exhaust hole 29 is formed in the rear portion of the upper inner surface plate 17 at a position directly above the side hot air passage 11, and the inside of the roasting chamber 3 and the upper exhaust passage 18 are communicated with each other. A communication hole 30 is provided in the upper part of the rear plate 1 b, and the upper exhaust passage 18 and the exhaust cylinder 27 are communicated with each other through the communication hole 30. An ignition device A for igniting the burner 4 and a thermocouple 32 for confirming combustion are mounted on the side surface portion 15 of the grill housing 1. The grill housing 1 configured as described above is formed of a metal plate with as little solid radiation as possible, and is formed of, for example, an aluminum steel plate.
[0010]
A tray 13 that is slidably inserted into the roasting chamber 3 in the grill housing 1 is placed on the bottom surface portion 14 and is formed in a square dish shape. With the tray 13 inserted into the roasting chamber 3, the rear end of the tray 13 is brought close to the rear plate 1 b and the rear end is continuous with the front end of the inclined surface 28. A door 34 for closing the front opening 16 is integrally attached to the front end of the tray 13 , and a handle 35 is integrally attached to the door 34. The door 34 is provided with a glass surface for seeing through the inside. The grill net 2 is installed horizontally above the tray 13, but a leg portion 36 that can hang downward is integrally provided before and after the grill net 2, and the lower end of the leg portion 36 is placed on the tray 13. Thus, the grill net 2 is detachably attached to the tray 13. In this way, the grill 2 is installed horizontally, but the exhaust port 12 is formed on the rear plate 1b at the lower part of the roasting chamber 3 so that the upper edge of the exhaust port 12 is substantially the same height as the grill 2. It is. The height substantially the same as that of the grill net 2 includes a height that is about 20 mm higher and lower than the height of the grill net 2. The upper part of the exhaust port 12 is located above the combustion position of the upper heating burner 4a and the lower heating burner 4b.
[0011]
The gas grill configured as described above is used as follows. A cooking object B such as fish is placed on the grill net 2, the upper heating burner 4a and the lower heating burner 4b are ignited, and the cooking object B is heated from above and below to be double-sided. At this time, the flame F is discharged in the horizontal direction from the lower heating burner 4b, and the lower surface side of the object to be cooked B is baked by the hot air from the flame F. On the other hand, the flame F is discharged upward from the upper heating burner 4a, hot air rising upward in the side hot air passage 11 is introduced into the upper portion of the roasting chamber 3, and the hot air introduced into the upper portion of the roasting chamber 3 The upper surface side of the cooking object B on the grill 2 is fired, and the exhaust is exhausted from the exhaust port 12 to the outside through the exhaust cylinder 27. At this time, hot air from the upper heating burner 4 a is introduced into the upper portion of the roasting chamber 3 through the side hot air passage 11, and exhausted from the exhaust port 12 located at the lower portion of the roasting chamber 3. The atmosphere temperature above the grill net 2 is raised, and the cooking object B on the grill net 2 can be fired at this ambient temperature. Thereby, when there is no to-be-cooked object B, the radiant heat from the top hits the saucer 13 and the saucer 13 is not heated to a high temperature. Accordingly, it is possible to prevent water from entering the tray 13 or to reduce the amount of water even if water is added. Further, since the upper portion of the exhaust port 12 is located above the upper heating burner 4a and the lower heating burner 4b, even those exhausted from below the grill 2 are used as the upper heating burner 4a and the lower heating burner 4b. The combustion type can be used, and the structure can be simplified and the cost can be reduced. Further, since hot air is supplied to the roasting chamber 3 from the side hot air passages 11 on both sides, the atmosphere temperature in the roasting chamber 3 can be increased uniformly, and the baking can be performed uniformly in the roasting chamber 3. Moreover, it can be heated from above and below by burning with the upper heating burner 4a and the lower heating burner 4b, but at this time, the heating power of the upper heating burner 4a and the lower heating burner 4b can be adjusted, It is possible to cook appropriately by adjusting the condition of heating from above the cooking object B on the grill 2 and the condition of heating from below. Further, since the upper heating burner 4a and the lower heating burner 4b are partitioned and a passage S for supplying secondary combustion air is formed above the lower heating burner 4b, the upper heating burner 4a Even if the lower heating burner 4b is provided in parallel, the combustion F is supplied to the passage S between them and the flame F blown from the lower heating burner 4b in the horizontal direction can be extended in the horizontal direction. And it can bake by heating uniformly to the central part in the roasting chamber 3.
[0012]
The upper heating burner 4a is provided with an ignition device A for igniting the upper heating burner 4a. The ignition device A is mainly composed of an ignition plug 6 and an ignition target 7. The ignition device A is provided at the rear position in the longitudinal direction of the upper heating burner 4a. The flame holes 5 provided at equal intervals in the longitudinal direction of the upper heating burner 4a are provided in two rows in the upper part, and a fuel gas which is a mixture of fuel and primary air is blown upward from the upper heating burner 4a. It is like that. A terminal fitting 40 is attached to the side face 15 at a position above the upper heating burner 4 a, and a spark plug 6 is attached to the terminal fitting 40. A discharge electrode 6a at the tip of the spark plug 6 projects inward in the horizontal direction. An upper surface piece 42 that protrudes into the side hot air passage 11 from the holding portion 41 that holds the spark plug 6 of the terminal fitting 40 extends horizontally, and hangs vertically downward from the tip of the upper surface piece 42. A piece 43 is suspended, and the suspended piece 43 serves as a wall surface portion 10 for guiding the fuel gas. A rectangular inclined guide surface 8 is formed on the wall portion 10 by cutting and raising. The inclined guide surface 8 is wide in the longitudinal direction in which the flame holes 5 are arranged. The inclined guide surface 8 is inclined so as to go upward toward the ignition plug 6, and the linear edge portion of the upper end edge of the inclined guide surface 8 is used as the ignition target 7.
[0013]
Thus, the fuel gas is projected upward from the flame hole 5 of the upper heating burner 4a as shown by the arrow α in FIGS. 1 and 2, and from the discharge electrode 6a of the spark plug 6 to the arrow β shown in FIGS. When it is discharged, it is ignited. At this time, the combustion gas is guided by the inclined guide surface 8 as indicated by the arrow α, and the fuel gas surely passes through the ignition target 7 and can be reliably ignited by the discharge from the discharge electrode 6a. In addition, when the grill is hot at the time of reignition, air flows in from the air inlet 21 and there is a secondary air flow as shown by the arrow γ in FIG. 1 due to the draft. The fuel gas blown upward from the flame hole 5 as shown by the arrow α is not kicked by the secondary air flow. That is, since the wall surface portion 10 is wide in the direction in which the flame holes 5 of the burner 4 are arranged and there is no gap between the lower end of the wall surface portion 10 and the burner 4, the flow of fuel gas is guided along the wall surface portion 10. Therefore, the flow of fuel gas is not kicked by the secondary air flow.
[0014]
The upper heating burner 4a is ignited by the ignition device A, while the lower heating burner 4b is ignited by a fire transfer from the upper heating burner 4a to the lower heating burner 4b by the flash pipe 45 as shown in FIG. Is done. The upper heating burner 4a is provided with a flame hole 5 so as to eject the fuel gas upward. This flame hole 5 is referred to as a flame hole 5a for convenience. The lower heating burner 4b is provided with a flame hole 5 for ejecting fuel gas toward the side. This flame hole 5 is referred to as a flame hole 5b for convenience. A flash pipe 45 is arranged so as to extend from the vicinity above the flame hole 5a of the upper heating burner 4a to the vicinity of the flame hole 5b of the lower heating burner 4b, and the upper heating burner 4a and the lower heating burner 4b are arranged. A flash pipe 45 is attached to a supporting plate 46 to be supported. The flame hole 5a is exposed to the opening at one end of the flash pipe 45, and the flame hole 5b is exposed to the opening at the other end of the flash pipe 45. At the position where the flash pipe 45 is mounted, an auxiliary flame hole 5c is formed in the upper part of the lower heating burner 4b to eject the fuel gas obliquely upward. The auxiliary flame hole 5c is provided only at a position where the flash pipe 45 is located. The flash pipe 45 is provided with an exhaust gas outlet 47 for discharging combustion exhaust gas at a position above the lower heating burner 4b.
[0015]
Accordingly, when the upper heating burner 4a and the lower heating burner 4b are ignited, the fuel gas is ejected from the flame holes 5a, 5b, 5c, and is first ignited by the ignition device A described above, and FIG. It becomes the state of. In this state have flame F1 is formed so as to protrude upward in the burner port 5a, the fuel gas ejected from the flame holes 5c flows through the flash pipes 45 as indicated by an arrow [delta], ejected from the burner ports 5b The fuel gas thus made flows through the flash pipe 45 as indicated by an arrow ε. Then, the fuel gas flowing as shown by the arrow δ is ignited by flashback, and a flame F2 is formed in the auxiliary flame hole 5c as shown in FIG. 9B. Then, the fuel gas flowing as shown by the arrow ε is ignited by flashback, and as shown in FIG. 9C, a flame F3 is formed in the flame hole 5b and transferred to the lower heating burner 4b. At this time, the combustion exhaust gas in the flash pipe 45 is discharged as indicated by an arrow ρ in FIG. 9C, and the secondary combustion air is smoothly supplied to the lower heating burner 4b. The auxiliary flame hole 5c is relayed even in the direction in which the direction of the flame hole 5 of the upper heating burner 4a and the direction of the flame hole 5 of the lower heating burner 4b are orthogonal to each other by transferring the flame with the flash pipe 45 having the above structure. Thus, the fire can be transferred reliably and smoothly.
[0016]
【The invention's effect】
According to the first aspect of the present invention, an inclined guide surface that is wide in the direction in which the flame holes of the burner are arranged and goes to the spark plug side as it goes in the direction of blowing out the fuel gas is disposed in the path through which the fuel gas passes. In addition, the linear edge portion of the edge of the inclined guide surface on the fuel gas blowout side is used as an ignition target opposed to the tip of the spark plug, so that the fuel gas emitted from the flame hole is linear along the inclined guide surface. It is guided to go to the ignition target, and when it is discharged from the spark plug to the ignition target, it is surely ignited and there is no ignition mistake. Furthermore, because the wall surface is provided along the path along which the fuel gas blown out from the burner flame hole passes, even if there is a draft secondary air flow during reignition (when the grill is hot), the flame of the burner The fuel gas blown out from the hole does not flow along the wall surface and the flow of the fuel gas is not kicked by the secondary air flow, and the fuel gas flows to the ignition target and is reliably ignited. In addition, since the inclined guide surface is formed by cutting and raising the wall surface portion, the inclined guide surface can be easily formed and the fuel gas can be more reliably guided to the ignition target.
[0017]
Further, the invention of claim 2 of the present invention is that in claim 1, the gap is not formed between the end of the wall surface portion and the burner, so that the flow of the fuel gas is guided along the wall surface portion, The flow of fuel gas is not kicked by the secondary air flow.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an example of an ignition device according to an embodiment of the present invention.
FIG. 2 is a perspective view for explaining the ignition state of the above.
FIGS. 3A and 3B show the same terminal fitting, wherein FIG. 3A is a sectional view seen from the front, FIG. 3B is a side view, and FIG. 3C is a bottom view;
FIG. 4 is a cross-sectional view seen from the front of the entire gas grill.
FIG. 5 is a cross-sectional view seen from the side surface of the above.
FIG. 6 is a sectional view seen from a plane in which the door is omitted.
FIG. 7 is an exploded perspective view of the above grill casing.
FIG. 8 is a perspective view showing the saucer and the door.
FIGS. 9A, 9B, and 9C are cross-sectional views illustrating a structure in which a flashback is performed by the above flashback.
FIG. 10 is a perspective view illustrating a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Grill housing | casing 2 Grill net 3 Roasting chamber 4 Burner 5 Flame hole 6 Spark plug 7 Ignition target 8 Inclined guide surface 10 Wall part

Claims (2)

A tubular burner is horizontally arranged on the side of the roasting chamber where the grill net in the grill housing is installed, and an ignition plug and an ignition target are arranged so as to sandwich the path through which the fuel gas blown out from the flame hole of the burner passes. An ignition device for a gas grill , wherein a wall surface portion is provided along a path along which the fuel gas blown out from the flame hole of the burner passes, and the width is widened in a direction in which the flame holes of the burner are arranged by cutting up the wall surface portion. An inclined guide surface inclined so as to go to the ignition plug side as it goes in the fuel gas blowing direction is provided in the path through which the fuel gas passes, and the linear edge portion of the edge on the fuel gas blowing side of the inclined guide surface is ignited An ignition device for a gas grill, characterized by being an ignition target facing the tip of a plug. The gas grill ignition device according to claim 1 , wherein a gap is not formed between the end of the wall surface and the burner .

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