JP2017207232A - Grill burner and stove with grill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively suppress generation of a resonance sound by a simple structure that does not adversely affect performance of a grill burner.SOLUTION: A grill burner 13 installed in an upper part of a grill compartment 8 of a table cooking stove 1 is made of a sheet metal formed by jointing a top board 21 to a lower board 22 including a plurality of flame holes. The top board 21 and the lower board 22 are fixed to each other by a screw 40 in the central part thereof, thereby suppressing natural vibration occurring immediately after ignition; thus, a resonance sound referred to as 'burner noise' is inhibited from generating.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grill burner used for a grill and a stove with a grill such as a table stove and a built-in stove equipped with the grill burner.

  In a grill provided on a table stove or the like, an object to be cooked such as fish is heated by a grill burner installed in a grill cabinet. In this grill burner, as disclosed in Patent Document 1, the outer periphery of the upper plate and the lower plate made of sheet metal is joined by caulking, welding, or the like, and fuel gas and air are mixed between the upper plate and the lower plate. It has a flat shape in which a chamber portion to which gas is supplied is formed. This grill burner is installed in the upper part of the grill cabinet, and the cooked food is cooked by burning the mixed gas from a plurality of flame openings formed in the lower plate.

In such a sheet metal grill burner, the vibration formed by the flame formed from the flame outlet of the lower plate periodically oscillates due to the unstable combustion state immediately after ignition, and this frequency is generated by the upper plate. In some cases, resonance occurs in accordance with the natural frequency, and a resonance sound called “burner noise” is generated.
In order to suppress the generation of this resonance noise, Patent Document 1 discloses an invention in which a reinforcing diaphragm made up of diaphragm ribs is formed at the diaphragm part forming the chamber part to increase the rigidity. Further, Patent Document 2 discloses an invention in which the upper plate is drawn so as to rise upward and rise in a ridge shape to increase rigidity.

JP 2011-7442 A JP2015-190653A

In the invention of Patent Document 1, there is a possibility that the reinforcing throttle varies depending on the lot, and the effect of preventing the generation of resonance noise may be reduced. In addition, the reinforcing throttle may adversely affect the flow of the mixed gas.
In addition, in the invention of Patent Document 2, in addition to reducing the degree of freedom of design by increasing the thickness of the grill burner due to the upward drawing, it also makes it difficult to uniformly supply the mixed gas. May cause adverse effects.
On the other hand, in addition to these inventions, measures to increase the thickness of the upper plate to increase the strength can be considered, but processing becomes difficult, and the cooking capacity becomes worse due to an increase in heat capacity, which can be cooked such as fish. There is also a risk that it will be difficult to burn.

  Therefore, an object of the present invention is to provide a grill burner and a stove with a grill that can effectively suppress the generation of resonance noise with a simple configuration that does not adversely affect the performance of the grill burner.

In order to achieve the above object, the invention described in claim 1 is a sheet metal grill burner which is installed in the upper part of a grill cabinet and is formed by joining an upper plate and a lower plate having a plurality of flame openings. And
The upper plate and the lower plate are fixed to each other at the center.
According to a second aspect of the present invention, in the configuration of the first aspect, the upper plate and the lower plate are fixed by screws in a state where the central portions are in contact with each other.
In order to achieve the above object, a third aspect of the present invention is a stove with a grill, wherein the grill burner according to the first or second aspect is installed in an upper portion of a grill chamber formed in the container. It is characterized by becoming.

According to the first and third aspects of the present invention, the upper plate and the lower plate of the grill burner are fixed to each other at the center, so that the vibration of the upper plate is forcibly suppressed even if vibration combustion occurs immediately after ignition. . Therefore, it is possible to effectively suppress the generation of resonance with a simple configuration that does not adversely affect the performance of the grill burner.
According to the second aspect of the invention, in addition to the above effects, the upper plate and the lower plate are fixed with screws in a state where the central portions are in contact with each other. It can be fixed without rattling, and a suitable suppression effect of resonance sound can be obtained.

It is a longitudinal cross-sectional view of the grill part in a table stove. It is explanatory drawing of a grill burner, (A) shows a plane and (B) shows a side surface, respectively. It is explanatory drawing of a grill burner, (A) shows a bottom face and (B) shows the AA cross section.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a grill portion of a table stove that is an example of a stove with a grill, and the top plate is omitted. This table stove 1 has in the vessel body 2 a pair of left and right (the right side in FIG. 1 is the front) pair of stoves 3 and 3 and a grill 4 positioned between the stoves 3 and 3. The stove 3 includes a stove burner 5 to which fuel gas is supplied via a gas amount adjusting device (not shown), and the burner body 6 of the stove burner 5 is exposed upward from a top plate that closes the upper surface of the body 2. On the burner body 6, a burner cap 7 that forms a flame opening on the outer periphery is placed.

  The grill 4 has a long box-shaped grill box 8 that is surrounded by a left and right side plates 9, 9, a bottom plate 10, a top plate 11 that is inclined forward and downward, and a rear plate 12. A grill burner 13 is installed, and a heat shield 14 covering the upper side of the grill burner 13 is attached. On the other hand, on the bottom plate 10, a tray 15 for supporting a grill net (not shown) is placed. A handle 16 is attached to the front end of the tray 15, and the tray 15 can be taken in and out of the grill warehouse 8 by the handle 16. On the upper side of the handle 16, a grill door 17 for closing the front surface of the grill cabinet 8 is provided. Further, an exhaust passage 18 projecting upward is formed on the rear upper side of the grill cabinet 8, and the upper end of the exhaust passage 18 is connected to an exhaust port provided in the top plate. On the left and right sides of the grill door 17 on the front panel 19 of the vessel body 2, the fire extinguishing knobs 20, 20... Corresponding to the stove burners 5, 5 and the grill burner 13 are provided.

As shown in FIGS. 2 and 3, the grill burner 13 is a flat body having a rectangular shape in plan view, and is made of a metal such as aluminum and overlaps an upper plate 21 and a lower plate 22 having substantially the same shape in plan view. 23, 23 is formed by caulking the two.
The grill burner 13 is formed with a throat portion 24 and a chamber portion 25. First, the throat portion 24 is formed in a tubular shape on one short side of the grill burner 13 in a direction parallel to the short side, and one end of the throat portion 24 is projected at right angles from the adjacent long side together with the flange portion 23. A damper cap 26 (FIG. 1) provided with a gas introduction hole is put on the projecting end of the throat portion 24, and a gas nozzle 27 is introduced to the flange cap 23 projecting on both sides of the throat portion 24. A positioning plate 28 for fixing coaxially with the hole is fixed. The other end of the throat portion 24 is a bent portion 29 that is bent at a right angle toward the chamber portion 25, and the bent portion 29 is press-molded only on the upper plate 21.

The chamber portion 25 is a flat hollow portion having a rectangular shape in plan view that is slightly smaller than the outer shape of the grill burner 13. The bent portion 29 of the throat portion 24 is connected to the short side of the upper bulged portion 30 of the upper plate 21.
Further, the upper surface of the upper bulging portion 30 is provided with an X-shaped throttle 32 in a plan view that is shallower than the upper bulging portion 30 so that the space in the thickness direction of the chamber portion 25 is shaped into the shape of the throttle 32. Narrow along. In the center of the diaphragm 32, a circular convex portion 33 for adjusting the surplus thickness during press working is left.

  On the other hand, the lower bulging portion 31 of the lower plate 22 includes a plurality of U-shaped formation ranges along the opposite short side and a pair of long sides except for the short side on the throat portion 24 side. Are formed. The formation range of the flame opening 34 does not overlap the diaphragm 32 of the upper plate 21 in the thickness direction. In addition, on the lower surface of the lower bulging portion 31, a pair of belt-like lower diaphragms 35, 35 whose both ends in the longitudinal direction are semicircular are formed on the inner side of the formation range of the flame opening 34. It is recessed shallower than 31. The lower diaphragms 35 and 35 are for preventing deformation of the chamber portion 25.

  The upper plate 21 and the lower plate 22 of the grill burner 13 are fixed to each other at the central portion of the chamber portion 25. Specifically, an upper concave portion 36 located inside the circular convex portion 33 is formed on the upper plate 21 side and a screw hole 37 is formed in the center thereof, while the lower plate 22 side is coaxial with the upper concave portion 36. The lower concave portion 38 to be contacted is formed, a through hole 39 is formed at the center thereof, and a screw 40 penetrating the through hole 39 from the lower side of the lower plate 22 is screwed into the screw hole 37, whereby the upper plate 21 The upper concave portion 36 and the lower concave portion 38 of the lower plate 22 are fixed to each other while being in contact with each other.

  In the grill 4 of the table stove 1 configured as described above, the grill burner 13 is a chamber in which an opening (not shown) provided in the top plate 11 is disposed on the top plate 11 from the upper side of the top plate 11 and the flame port 34 is located on the lower side. The portion 25 is accommodated and the throat portion 24 is installed in the rear side direction, and the flange portion 23 is attached to the top plate 11 in a posture inclined forward and downward by screws 41, 41,. If the gas nozzle 27 of the gas pipe piped to the grill 4 is fixed to the positioning plate 28, the installation is completed with the flame port 34 exposed in the grill cabinet 8.

  In the grill 4, when the point-extinguishing knob 20 provided on the front panel 19 of the container body 2 is operated, the fuel gas supplied to the gas pipe is ejected from the gas nozzle 27 and from the damper cap 26 of the throat portion 24 together with the combustion air. The mixed gas of the fuel gas and the combustion air flows into the chamber portion 25 from the bent portion 29 through the throat portion 24. The mixed gas that has flowed into the chamber portion 25 is ejected from each flame port 34 and burned in the formation range of the flame port 34 by discharge of an ignition electrode (not shown). Therefore, the food to be cooked on the grill is cooked from above.

  When vibration combustion occurs in which the flame formed from the flame port 34 periodically oscillates due to the unstable combustion state immediately after ignition, the upper plate 21 tries to follow up and down. However, since the upper plate 21 is fixed to the lower plate 22 with a screw 40 at the center, the natural vibration is forcibly suppressed, and the generation of a resonance sound called “burner noise” is suppressed. In particular, since the central portion of the upper bulging portion 30 that is most likely to vibrate is fixed, the effect of suppressing natural vibration is high. At this time, since the upper plate 21 and the lower plate 22 are fixed only by the upper concave portion 36 and the lower concave portion 38 that form a small area in the center of the chamber portion 25, the flow of the mixed gas is not hindered. , And evenly supplied to the flame outlet 34.

Thus, according to the grill burner 13 and the table stove 1 of the said form, since the upper board 21 and the lower board 22 were mutually fixed in the center part, even if vibration combustion arises immediately after ignition, the vibration of the upper board 21 will be carried out. Forced to be suppressed. Therefore, it is possible to effectively suppress the generation of resonance with a simple configuration that does not adversely affect the performance of the grill burner 13.
In particular, here, the upper plate 21 and the lower plate 22 are fixed with screws 40 in a state where the upper concave portion 36 and the lower concave portion 38 are in contact with each other. It can be fixed without rattling, and a suitable suppression effect of resonance sound can be obtained.

The number of screws for fixing the upper plate and the lower plate is not limited to one, and a plurality of screws can be arranged at predetermined intervals in the longitudinal direction and the short direction, or can be arranged on concentric circles. . You may screw in from the upper board side.
Further, the fixing of the upper plate and the lower plate is not limited to screws, and other fixing means such as spot welding, button lock processing, and rivets may be employed.
The shape of the grill burner may be fixed at the bottom of the diaphragm if it does not have a circular convex part, and if it does not have a diaphragm, a recess is formed in the center part of the upper and lower plates, respectively. It may be fixed.

  In addition, in the above embodiment, a single-sided grill having a grill burner only on the upper side is provided, but the present invention can also be applied to an upper burner even with a double-sided grill having a lower burner. In the above embodiment, the stove with a grill is described as a stove with a grill. However, the present invention can also be applied to a built-in stove.

  1 ・ ・ Table cooker, 2 ・ ・ Body, 3 ・ ・ Hot, 4 ・ ・ Grill, 5 ・ ・ Compo burner, 8 ・ ・ Grill storage, 11 ・ ・ Top plate, 13 ・ ・ Grill burner, 14 ・ ・ Heat insulation Plate, 21 ·· Upper plate, 22 ·· Lower plate, 24 ·· Throat portion, 25 ·· Chamber portion, 30 ·· Upper bulge portion, 31 ·· Lower bulge portion, 32 ·· Throttle portion, 33 ·· -Circular convex part, 34-Flame port, 36-Upper concave part, 37-Screw hole, 38-Lower concave part, 39-Through hole, 40, 41-Screw

Claims (3)

A grill burner made of sheet metal, which is installed at the upper part of the grill cabinet and joins an upper plate and a lower plate having a plurality of flame openings,
The grill burner, wherein the upper plate and the lower plate are fixed to each other at a central portion.   2. The grill burner according to claim 1, wherein the upper plate and the lower plate are fixed by screws in a state where the central portions are in contact with each other.   A stove with a grill, wherein the grill burner according to claim 1 or 2 is installed in an upper part of a grill cabinet formed in the container.

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