JP6832556B2 - Grill burner and stove with grill - Google Patents

Description

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

In the grill provided on the table stove or the like, the food to be cooked such as fish is cooked by the grill burner installed in the grill. As disclosed in Patent Document 1, this grill burner joins the outer periphery of a sheet metal upper plate and a lower plate by caulking or welding, and mixes fuel gas and air between the upper plate and the lower plate. It has a flat shape with a chamber to which gas is supplied. This grill burner is installed in the upper part of the grill chamber, and the mixed gas is burned from a plurality of flame ports formed on the lower plate to cook the object to be cooked.

In such a sheet metal grill burner, vibration combustion occurs in which the flame formed from the flame port of the lower plate vibrates periodically due to the unstable combustion state immediately after ignition, and this frequency is the frequency of the upper plate. It resonates in agreement with the natural frequency, and a resonance sound called "burner squeal" may be generated.
In order to suppress the generation of this resonance sound, Patent Document 1 discloses an invention in which a reinforcing diaphragm made of a diaphragm rib is formed in a diaphragm portion forming a chamber portion to increase the rigidity. Further, Patent Document 2 discloses an invention in which the upper plate is drawn and formed so as to be raised in a ridge shape upward to increase the rigidity.

Japanese Unexamined Patent Publication No. 2011-7442 JP-A-2015-190653

In the invention of Patent Document 1, the reinforcing throttle may vary depending on the lot, and the effect of preventing the generation of resonance sound may be lowered, and the reinforcing throttle may adversely affect the flow of the mixed gas.
Further, in the invention of Patent Document 2, in addition to the thickness of the grill burner being increased by forming the throttle upward and the degree of freedom in design being narrowed, it is also difficult to uniformly supply the mixed gas. May have an adverse effect.
On the other hand, in addition to these inventions, measures to increase the wall thickness of the upper plate to increase the strength can be considered, but the processing becomes difficult, the heat capacity increases, the cooking performance deteriorates, and the food to be cooked such as fish May become 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 sound with a simple configuration that does not adversely affect the performance of the grill burner.

To achieve the above object, a first aspect of the present invention, is placed on top of the grill box, joined with the upper plate which is press-molded, and a lower plate which is press-molded with a plurality of burner ports It is a grill burner made of sheet metal.
An upper concave portion recessed downward is formed in the central portion of the upper plate, and a lower concave portion recessed upward is formed in the central portion of the lower plate, and the upper concave portion and the lower concave portion are in contact with each other. It is characterized in that it is fixed by screws.
In order to achieve the above object, the invention according to claim 2 is a stove with a grill, wherein the grill burner according to claim 1 is installed on the upper part of the grill chamber formed in the vessel. It is characterized by.

According to the inventions of claims 1 and 2, the upper plate and the lower plate of the grill burner are fixed to each other at the central portion, 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 sound with a simple configuration that does not adversely affect the performance of the grill burner.
In particular, since the upper plate and the lower plate are fixed by screws in a state where the upper concave portion and the lower concave portion in the central portion are in contact with each other, the upper plate and the lower plate can be fixed without rattling, which is preferable. The effect of suppressing the resonance sound can be obtained.

It is a vertical sectional view of the grill part in a table stove. In the explanatory view of the grill burner, (A) shows a flat surface and (B) shows a side surface. In the explanatory view of the grill burner, (A) shows the bottom surface, and (B) shows the cross section along the AA line.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a vertical cross-sectional view of a grill portion of a table stove, which is an example of a stove with a grill, and the top plate is omitted. The table stove 1 has a pair of left and right stoves 3 and 3 (the right side in FIG. 1 is the front) and a grill 4 located between the stoves 3 and 3 in the body 2. 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. A burner cap 7 that forms a flame port on the outer periphery is placed on the burner main body 6.

The grill 4 has left and right side plates 9 and 9, a bottom plate 10, a top plate 11 that is inclined forward and downward, and a box-shaped grill 8 that is long in the front-rear direction and is surrounded by the rear plate 12. , The grill burner 13 is installed, and the heat shield plate 14 that covers the upper part of the grill burner 13 is attached. On the other hand, a saucer 15 for supporting a grill (not shown) is placed on the bottom plate 10. A handle 16 is attached to the front end of the saucer 15, and the handle 16 allows the saucer 15 to be taken in and out of the grill storage 8. A grill door 17 that closes the front surface of the grill storage 8 is provided on the upper side of the handle 16. Further, an exhaust passage 18 projecting upward is formed on the upper rear side of the grill storage 8, and the upper end of the exhaust passage 18 is connected to an exhaust port provided on the top plate. On the left and right sides of the grill door 17 on the front panel 19 of the body 2, point 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 a plan view, and the upper plate 21 and the lower plate 22 which are made of metal such as aluminum and have substantially the same shape in a plan view are overlapped with each other to form an outer flange portion. 23, 23 are caulked together.
A throat portion 24 and a chamber portion 25 are formed in the grill burner 13. First, the throat portion 24 is formed in a tubular shape on one short side side of the grill burner 13 in a direction parallel to the short side, and one end thereof is projected at a right angle from the adjacent long side together with the flange portion 23. A damper cap 26 (FIG. 1) having a gas introduction hole is covered on the protruding end of the throat portion 24, and a gas nozzle 27 is introduced into the flange portion 23 protruding on both sides of the throat portion 24. A positioning plate 28 for coaxially fixing to the hole is fixed. The other end of the throat portion 24 is a bent portion 29 that bends at a right angle toward the chamber portion 25 side, and this 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 a plan view, which is one size smaller than the outer shape of the grill burner 13, and is press-formed on the upper plate 21 and the deep bottom upper bulging portion 30 and the lower plate 22. The bent portion 29 of the throat portion 24 is connected to the short side of the upper bulging portion 30 on the upper plate 21, which is formed by the lower bulging portion 31 of the shallow bottom.
Further, on the upper surface of the upper bulging portion 30, an X-shaped diaphragm 32 in a plan view is recessed shallower than the upper bulging portion 30, and the space in the thickness direction of the chamber portion 25 is formed into the shape of the diaphragm 32. It is narrowed along. At the center of the drawing 32, a circular convex portion 33 for adjusting the excess meat during press working is left.

On the other hand, the lower bulging portion 31 of the lower plate 22 has a plurality of U-shaped forming ranges along the opposite short side and the pair of long sides connected to the short side on the opposite side, except for the short side on the throat portion 24 side. The flame ports 34, 34 ... Are formed. The forming range of the flame port 34 does not overlap with the throttle 32 of the upper plate 21 in the thickness direction. Further, on the lower surface of the lower bulging portion 31, a pair of band-shaped lower diaphragms 35, 35 having semicircular ends in the longitudinal direction are provided inside the formation range of the flame port 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, the upper concave portion 36 located inside the circular convex portion 33 is formed on the upper plate 21 side to form a screw hole 37 at the center thereof, while the lower plate 22 side is coaxial with the upper concave portion 36. A lower concave portion 38 to be abutted is formed, a through hole 39 is formed in 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 to form an upper plate 21. The structure is such that the upper recess 36 and the lower recess 38 of the lower plate 22 are in contact with each other and fixed to each other.

In the grill 4 of the table stove 1 configured as described above, the grill burner 13 is a chamber in which the flame port 34 is on the lower side in an opening (not shown) provided in the top plate 11 from the upper side of the top plate 11 of the grill storage 8. The portion 25 is settled, the throat portion 24 is installed so as to be on the rear side, and the flange portion 23 is attached to the top plate 11 by screws 41, 41, ... Then, 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 storage 8.

When the point fire extinguishing knob 20 provided on the front panel 19 of the body 2 is operated in the grill 4, the fuel gas supplied to the gas pipe is ejected from the gas nozzle 27 and is ejected 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 in and flows from the bent portion 29 to the chamber portion 25 through the throat portion 24. The mixed gas that has flowed into the chamber portion 25 is ejected from each flame port 34 and burns within the formation range of the flame port 34 by the discharge of an ignition electrode (not shown). Therefore, the object to be cooked on the grill is cooked from above.

Then, when vibration combustion occurs in which the flame formed from the flame port 34 vibrates periodically due to the unstable combustion state immediately after ignition, the upper plate 21 tries to vibrate up and down following it. However, since the upper plate 21 is fixed to the lower plate 22 by a screw 40 at the center, the natural vibration is forcibly suppressed and the generation of a resonance sound called "burner squeal" is suppressed. In particular, since the central portion of the upper bulging portion 30, which 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 recess 36 and the lower recess 38, which are a small area in the center of the chamber portion 25, the flow of the mixed gas is not obstructed. , Is evenly supplied to the flame port 34.

As described above, according to the grill burner 13 and the table stove 1 of the above-described embodiment, since the upper plate 21 and the lower plate 22 are fixed to each other at the central portion, the vibration of the upper plate 21 is generated even if vibration combustion occurs immediately after ignition. It is forcibly suppressed. Therefore, it is possible to effectively suppress the generation of resonance sound with a simple configuration that does not adversely affect the performance of the grill burner 13.
In particular, here, since the upper plate 21 and the lower plate 22 are fixed by the screws 40 in a state where the upper recess 36 and the lower recess 38 in the center are in contact with each other, the upper plate 21 and the lower plate 22 are fixed to each other. It can be fixed without rattling, and a suitable resonance sound suppressing effect 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 may be arranged at predetermined intervals in the longitudinal direction or the lateral direction, or may be arranged concentrically. .. It may be screwed in from the upper plate 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 adopted.
As for the shape of the grill burner, if there is no circular convex portion, it may be fixed on the bottom surface of the diaphragm, or if there is no throttle, concave portions are formed at the center of the upper plate and the lower plate, respectively. It may be fixed.

In addition, in the above embodiment, the single-sided grill has a grill burner only on the upper side, but the present invention can be applied to the upper burner even if the double-sided grill has a lower burner. Further, in the above embodiment, the table stove is described as a stove with a grill, but the present invention can be applied even to a built-in stove.

1 ... table stove, 2 ... body, 3 ... stove, 4 ... grill, 5 ... stove burner, 8 ... grill storage, 11 ... top plate, 13 ... grill burner, 14 ... heat shield Plate, 21 ... Upper plate, 22 ... Lower plate, 24 ... Throat part, 25 ... Chamber part, 30 ... Upper bulge part, 31 ... Lower bulge part, 32 ... Squeeze, 33 ... -Circular convex part, 34 ... Burner, 36 ... Upper concave, 37 ... Screw hole, 38 ... Lower concave, 39 ... Through hole, 40, 41 ... Screw.

Claims (2)

It is placed on top of the grill box, an upper plate which is press-molded, a Gurirubana made of sheet metal comprising a plurality of burner ports joining the lower plate that is press-molded,
An upper recess that is recessed downward is formed in the central portion of the upper plate, a lower recess that is recessed upward is formed in the central portion of the lower plate, and the upper recess and the lower recess are in contact with each other. A grill burner characterized by being fixed by screws in contact. A stove with a grill in which the grill burner according to claim 1 is installed in the upper part of the grill chamber formed in the vessel.

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