JP4050430B2 - Gas grill - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas grill for heating the food, such as fish in the heating chamber with burners comprising a burner body and the burner port unit.
[0002]
[Prior art]
For example, in a gas grill, the burner is a ceramic burner body that is attached to the burner body opening to which all the air necessary for combustion along with gas is supplied as primary air, and a plurality of small holes as flame holes. An all-primary pneumatic burner made of a burner head made of steel is often used. In this burner, the air-fuel mixture supplied to the burner main body is ejected from a small hole of the burner head and ignited, and burns as a short flame near the surface of the burner head, and the vicinity of the surface becomes red hot. The cooking object in the heating chamber of the gas grill is heated by the radiant heat from the surface of the burner head.
[0003]
[Problems to be solved by the invention]
The all-primary-air burner does not require secondary air in the heating chamber, so in particular, the combustion exhaust gas is temporarily put into the heating chamber by connecting the heating chamber and the exhaust chamber through a communication port located below the grill. It is suitable for gas grills that heat and cook foods with high-temperature hot air by convection of the combustion exhaust gas, but the use of a ceramic burner head increases manufacturing costs, and in turn gas grills. This leads to an overall cost increase.
[0004]
Accordingly, a first aspect of the present invention is intended to provide a gas grill for cooking an object to be cooked at a high temperature hot air by convection above Symbol flue gas at low cost.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is provided in a heating chamber, a burner body provided on the left and right side surfaces of the heating chamber , and taking in all air necessary for combustion together with gas, and the burner body. A flame hole part that is provided and ejects a mixture of the gas and air, and the flame hole part is formed by a plurality of alternately stacked flat plates and corrugated plates, and in the heating chamber. A grill net provided below the burner and on which the object to be cooked is placed, and an exhaust chamber that is arranged in parallel with the heating cabinet and communicates with the heating cabinet through a communication opening that opens at a position lower than the grill net. When the burner burns, the combustion exhaust gas is once retained in the upper part of the heating chamber and then guided to the exhaust chamber through the communication port, so that the cooking object is heated with high-temperature hot air by convection of the combustion exhaust gas. And can be heated with the bar The air suction hole is characterized in that provided at a position lower than the upper end of the communication port.
In addition to the object of the first aspect, the invention according to the second aspect provides a continuous cross-sectional shape of the corrugated plate having inflection points in order to effectively prevent deformation of the flame hole portion of the burner due to thermal expansion. It is a curved line.
[0006]
In addition to the object of the first or second aspect , the invention according to the third aspect provides a burner in which a part or the whole of the left and right side walls of the heating chamber is burnered in order to achieve a rational configuration that leads to further suppression of manufacturing costs. It is formed with the main body.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall view of the burner, and FIG. 2 is an explanatory cross-sectional view. The burner 1 includes a hollow burner body 2 and a flame hole unit 3 as a flame hole portion attached to one side of the burner body 2. The burner body 2 is formed by press-molding a metal upper plate 4 and a lower plate 5 and caulking them together to form a rectangular hollow portion 6 to which the flame hole unit 3 is attached, and an end portion of the hollow portion 6. A throat portion 7 communicating with the throat portion 7 is formed so as to be folded obliquely downward, and a primary air suction hole 8 is opened at the base end of the throat portion 7. In addition, a holding wall 9 of the flame hole unit 3 is erected on the upper plate 4 in a square shape.
The flame hole unit 3 is formed by alternately laminating the corrugated plates 11, 11... And the flat plates 12, 12... In the space surrounded by the strip-shaped frame plate 10. Innumerable flame holes 13, 13... For communicating the hollow portion 6 with the outside are formed. Specifically, a corrugated sheet 11 is manufactured by feeding a metal foil tape such as a stainless steel foil between a pair of formed gears meshed with each other and cutting it to a predetermined dimension, and a flat plate 12 having the same dimension is prepared. Then, the corrugated plates 11 and the flat plates 12 are alternately stacked in the bent frame plate 10, and after the lamination, the frame plate 10 is joined. Of course, the manufacturing method is not limited to this. In short, since it is sufficient that the flame hole is formed by the corrugated plate and the flat plate in the completed state of the flame hole unit 3, the corrugated plate and the flat plate are not cut for each layer. It is also possible to cut and fold each other and stack them alternately, or to fold and stack continuous corrugated sheets and flat plates that are not cut alternately.
[0008]
Further, the shape of the flame hole 13 determined by the corrugated plate 11 may be a triangular shape as shown in FIG. 3A, but the inflection point O between the flame holes 13 and 13 as shown in FIG. It is desirable to use a semicircular continuous curve having In the case of (A), if thermal expansion occurs in the corrugated plate 11 during combustion, the flat plate 12 is distorted as shown by a two-dot chain line due to thermal expansion of the linear portion of the corrugated plate 11, and the thickness of the flat plate 12 is thick. The flame hole unit 3 as a whole may be deformed, but in the case of (B), the curved portion is deformed toward the adjacent flame hole 13 around the inflection point O as indicated by a two-dot chain line. This is because the expansion can be absorbed, and even if the flat plate 12 is a little thick, deformation of the entire flame hole unit 3 can be effectively prevented.
When the flame hole unit 3 formed in this way is fitted into the holding wall 9 of the burner body 2 and the tip of the holding wall 9 is bent slightly inward to prevent the burner body 2 from coming off, a number of flame holes 13, 13 are formed on one side of the burner body 2.・ ・ All primary air burners with combustion surfaces formed are completed.
In addition, when the example by the natural air supply of the flame hole unit 3 is given, the space | interval of the flat plates 12 and 12 is 1 in the corrugated plate 11 and the flat plate 12 of thickness 0.05mm, width 10-13mm, and length 210mm. When 5 to 7 rows of flame hole units 3 are formed with a thickness of 7 to 1.8 mm, combustion of 450 to 800 kcal / h is possible.
[0009]
Next, a gas grill using the burner 1 will be described.
4 is a cross-sectional view of the gas grill 20, and FIG. 5 is an explanatory view of the vertical cross-section. The grill 22 for placing the food F such as fish is placed in the middle of the heating chamber 21, and the grill 22 is placed in the lower. A tray 23 that can be slid out and pulled out is provided. At the back of the heating chamber 21, an exhaust chamber 25 is provided in parallel with the heating chamber 21 via a partition wall 24 and opens an exhaust port 26 at the upper side. The heating chamber 21 and the exhaust chamber 25 are provided on the partition wall 24. Is provided at a position lower than the placement surface of the cooking object F in the grill 22.
In addition, a handle 28 that is integrally fixed to the tray 23 and an opening / closing door 29 that opens and closes in conjunction with the withdrawal of the tray 23 are provided at the front center of the heating chamber 21. Therefore, when the handle 28 is pulled out to the front, the tray 23 fixed to the handle 28 slides on the bottom surface of the heating chamber 21 and the grill 22 placed on the tray 23 is pulled out simultaneously. Reference numeral 30 denotes a gap that is provided on the front bottom surface of the heating chamber 21 and allows the heating chamber 21 to communicate with the outside.
[0010]
A pair of burners 1, 1 are provided on the left and right side surfaces of the heating chamber 21 above the grill 22. For attachment to the heating chamber 21, the flange 33 of the mounting bracket 32 is screwed to the side wall 31 in a state in which the rectangular tube portion 34 is fitted in the opening formed in the side wall 31 of the heating chamber 21, and the burner is attached to the rectangular tube portion 34. This is done by fitting one holding wall 9, and by this attachment, only the combustion surface of the flame hole unit 3 is exposed in the heating chamber 21. In the attached state, as shown in FIG. 5, the primary air suction hole 8 of the throat portion 7 is set to a position lower than the upper end surface of the communication port 27 of the heating chamber 21. Reference numeral 14 denotes a gas nozzle. In each burner 1, a flame holding plate 15 that protects the flame from convection of combustion exhaust gas in the heating chamber 21 (which is generated upward in the vicinity of the side wall 31) is provided on the lower frame plate 10 of the flame hole unit 3. It is attached. Although this may be retrofitted as in this embodiment, it may be formed by partially elongating the frame plate 10 of the flame hole unit 3 or the holding wall 9 of the burner body 2 in advance.
Further, an ignition electrode 35 is arranged in the heating chamber 21 so as to face the combustion surface of each burner 1, while the tip of the heating chamber 21 is inclined to the center between the burners 1 and 1 with the tip downward. Exhaust guide portions 36 having a V-shaped cross section are formed so as to face the burner 1 side.
[0011]
In the gas grill 20 configured as described above, when an ignition operation is performed, gas is ejected from the gas nozzle 14 to the throat portion 7 of the burner body 2, and all the primary necessary for combustion is combusted from the primary air intake hole 8 along with the ejection. Air is taken in. The fuel gas thus mixed is ignited from the hollow portion 6 of the burner body 2 through the flame holes 13, 13,... It burns on the entire surface of the flame hole unit 3. When combustion starts, high-temperature combustion exhaust gas once accumulates in the upper portion of the heating chamber 21, overflows into the lower communication port 27, flows into the exhaust chamber 25, rises in the exhaust chamber 25 due to the draft effect, and goes out from the exhaust port 26 to the outside. Although the exhaust gas is discharged, the combustion exhaust gas before the discharge flows toward the upper central portion by the draft force and the jet power of the fuel gas. The exhaust guide portion 36 having a V-shaped cross section leads from the upper side to the lower cooking object F direction. Led.
Therefore, in the heating chamber 21, as shown by a dotted line in FIG. 4, the combustion exhaust gas that has risen along the left and right side walls 31 flows to the center along the ceiling of the heating chamber 21 and descends. Regardless of the radiation of the burner 1, the object F is heated and cooked by being filled with high-temperature combustion exhaust gas that is filled and convected. The burner 1 is an all-primary air burner that supplies all air necessary for combustion as primary air, and therefore maintains good combustion even when the heating chamber 21 is filled with combustion exhaust gas.
[0012]
Thus, according to the burner 1 of the said form, since it can use effectively as an all-primary air type burner, without using a ceramic burner head, manufacturing cost can be low. Therefore, even in the gas grill 20 using the burner 1, desired heating cooking can be performed without using an all-primary air burner using ceramic, and the cost can be reduced.
Here, since the primary air suction hole 8 of the burner 1 is installed at a position lower than the upper end of the communication port 27 of the heating chamber 21, the draft effect works sufficiently to suck in fresh air effectively. And a good combustion state can be maintained.
[0013]
Note that the shape of the burner 1 is not the shape in which the throat portion 7 is folded back as in the above embodiment, but may be another shape such as an inverted L shape in which the throat portion 7 is formed at right angles to the hollow portion 6. As for the mounting structure to the heating chamber 21, the rectangular tube portion 34 of the mounting bracket 32 is mounted in the heating chamber 21, or the rectangular tube portion 34 is sandwiched between the flame hole unit 3 and the holding wall 9. It is possible to change the design of the flame hole unit 3 or to prevent the flame hole unit 3 from being opened in the short direction by connecting a plurality of rivets or the like in the short direction together with the flame hole unit 3 alone or the holding wall 9. good.
Furthermore, the shape of the corrugated plate and the flame hole is most preferably based on the continuous curve described in FIG. 3B. It is possible to make design changes such as bending zigzag so as to form a concave or convex shape so as to form a square or trapezoidal flame hole.
[0014]
Further, the position of the throat portion 7 does not need to be lower than the upper end of the communication port 27 as long as the burner 1 is attached outside the heating chamber 21, so the upper plate of the burner main body as shown in FIG. It is also possible to form the hollow portion 6 and the throat portion 7 so as to sandwich the flame hole unit 3 between the lower plate 5 and the lower plate 5 and attach them horizontally to the heating chamber 21. Here, a modified example in which the hollow portion 6 and the throat portion 7 are formed by the partition plate 16 that partitions the burner body 2 is also illustrated.
On the other hand, for example, when the burner of FIG. 1 is used, the gas grill is formed with openings 37 and 37 that open in accordance with the shape of the burner on the side walls 31 and 31 of the heating chamber 21 as shown in FIG. If the burner 1 is attached in such a manner as to block each of 37, the side wall 31 can be partially omitted as much as the burner 1 can be substituted, and the gas grill 20 with reduced manufacturing cost can be obtained. Of course, depending on the shape of the burner, not only a part of the side wall but also the whole side wall can be formed by the burner body.
[0015]
【The invention's effect】
According to the invention described in claim 1, the burner port unit, by adopting the composed formed from a plurality of flat plate and the corrugated plate are alternately stacked burner, even without using a ceramic burner head It can be used effectively as an all-primary air burner and can be manufactured at low cost. In addition, by using the burner in a gas grill that performs cooking with high-temperature hot air by convection of the combustion exhaust gas, desired cooking can be performed without using an all-primary air burner using ceramic, and the overall cost can be reduced. It will be suppressed. Furthermore, by providing the burner air suction hole at a position lower than the upper end of the communication port, it is possible to maintain good combustion of the burner even in a gas grill heated by high-temperature hot air by convection of combustion exhaust gas.
According to the second aspect of the present invention , in addition to the object of the first aspect, the cross-sectional shape of the corrugated plate is a continuous curve having an inflection point, so that the flame hole of the burner is deformed by thermal expansion. It can be effectively prevented.
According to the third aspect of the invention, in addition to the effect of the first or second aspect , part or the whole of the left and right side walls of the heating chamber is formed by the burner body, which leads to further suppression of the manufacturing cost. Reasonable composition.
[Brief description of the drawings]
FIG. 1 is an overall view of a burner.
FIG. 2 is a cross-sectional explanatory view of a burner.
FIG. 3A is an explanatory diagram of a flame hole.
(B) It is explanatory drawing of a flame hole.
FIG. 4 is a cross-sectional explanatory view of a gas grill.
FIG. 5 is an explanatory view of a longitudinal section of a gas grill.
FIG. 6 is a cross-sectional explanatory view of a modified example of a burner.
FIG. 7 is a cross sectional explanatory view of a modified example of a gas grill.
[Explanation of symbols]
1 .... Burner, 2 .... Burner body, 3 .... Flame hole unit, 6 .... Hollow part, 7 .... Throat part, 11 .... Corrugated plate, 12 .... Flat plate, 13 .... Flame hole, 20 .... Gas grill, 21 ... heating chamber, 22 ... grill, 23 ... saucer, 25 ... exhaust chamber, 27 ... communication port, 31 ... side wall, 37 ... opening.

Claims (3)

A heating cabinet;
The burner body is provided on the left and right side surfaces of the heating chamber and takes in all the air necessary for combustion together with the gas, and comprises a flame hole portion that is provided in the burner body and ejects a mixture of the gas and air, A burner formed of a plurality of flat plates and corrugated plates laminated alternately ,
In the heating chamber, provided below the burner, a grill net for placing an object to be cooked,
An exhaust chamber that is arranged in parallel with the heating chamber and communicates with the heating chamber through a communication port that opens at a position lower than the grill.
During combustion of the burner, combustion exhaust gas is once retained in the upper part of the heating chamber, and then guided to the exhaust chamber through the communication port, so that the food to be cooked is heated with hot air generated by convection of the combustion exhaust gas. with the possible heating,
A gas grill provided with an air suction hole of the burner at a position lower than an upper end of the communication port . The gas grill according to claim 1, wherein a cross-sectional shape of the corrugated plate is a continuous curve having an inflection point. The gas grill according to claim 1 or 2 , wherein a part or the whole of the left and right side walls of the heating chamber is formed by a burner body.

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