JP2001314329A - Exhaust structure for grill chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve combustibility by smoothly discharging combustion waste gases in a grill chamber and smoke, etc., given off from materials to be cooked in a grill for cooking to heat materials to be cooked by the convection heat of the combustion exhaust gases by stuffing high-temperature combustion exhaust gases in the upper part of the grill chamber. SOLUTION: Gas burners to heat and cook materials to be cooled placed on a gridiron are provided at the inner wall surfaces of the grill chamber. Exhaust ducts arranged in a row in the rear of the grill chamber connected from the grill chamber to naturally discharge combustion waste gases, smoke, etc., given off from the materials to be cooked by draft effects are formed and sequentially enlarged in diameter from the exhaust downstream side toward the exhaust upstream side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking grill for heating food such as fish on a grill in a grill storage by a gas burner, and more particularly to a grill storage for heating the food. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust structure of a grill storage for reducing the resistance of exhaust flow from an exhaust duct, such as combustion waste gas or smoke generated from a cooking object, which fills the inside.

[0002]

2. Description of the Related Art Conventionally, a table stove incorporating a cooking grill for heating and cooking an object to be cooked such as fish in a grill storage is known. As shown in FIG. 1, such a cooking grill includes a grill 24 for placing the object F to be cooked in the grill 22 and a saucer 28 for receiving grease and the like from the object to be cooked. The combustion surface of an all-primary pneumatic upper burner 26 installed on the upper side surface in the inside 22 is directed obliquely upward, and a Bunsen combustion type lower burner 27 is provided on the slightly lower side surface of the grill 24. A communication port 38 to the exhaust chamber 36 at the depth of the grille 24 is provided below the surface of the grill 24 on which the object F is placed.

[0003] With such a configuration, the combustion waste gas in the grill storage 22 is filled from the upper side to the lower side while reducing the heating of the baked fat and the like accumulated in the pan 28 at the lower part of the grill storage 22. By heating the object to be cooked F on the grill 24 with heat, the temperature of the baked fat can be suppressed below the ignition point without impairing the cooking performance, and furthermore, the draft effect of the exhaust chamber 36 allows the grill chamber to be located in front of the grill storage. Gap 47
And external fresh air is sucked from the gallery 47a,
There is a so-called waterless grill that cools the tray 28 and discharges it from the rear communication port 38 to prevent ignition due to overheating such as baked fat without filling the tray 28 with water.

In such a cooking grill, after the combustion waste gas of the gas burner is sufficiently stored in the grill storage 22 and is used for heating the food F, the combustion waste gas and the smoke generated from the food F are heated. And the like form a flow concentrated on the upper side of the communication port 38 provided below the cooking object F mounting surface of the grill 24 and flow to the exhaust chamber 36, and from the exhaust port 32 of the exhaust duct 34 by the draft effect. Naturally exhausted outside the refrigerator. As a structure of the exhaust duct 34, for example, a structure shown in FIG. 7 is known.

FIG. 1 shows a cross section taken along line BB of FIG. 1. The exhaust duct 34 has a straight structure in which the exhaust area is constant from the exhaust upstream side to the exhaust downstream side. In this case, when the burnt fat is abnormally overheated and ignites, in order to prevent the flame from overflowing from the exhaust port 32 to the outside, the propagation of the flame is prevented by a perforated plate having a plurality of ventilation holes. Some have a frame trap 33 for extinguishing the flame.

[0006]

However, in such a grill for cooking on both sides of an oven-like heating structure using a natural exhaust method, high-temperature combustion waste gas is sufficiently trapped in the grill cabinet 22 and the object to be cooked is heated. After being subjected to heating of F
The combustion waste gas and the smoke generated from the food F are discharged from the communication port 3 provided below the surface of the grill 24 where the food F is placed.
8 flows into the exhaust chamber 36 through the upper part of the exhaust pipe 8 and is smoothly discharged from the exhaust port 32 of the exhaust duct 34 to the outside of the refrigerator without resistance, thereby ensuring good combustibility. However, the straight exhaust shown in FIG. In the case of the structure, the length of the exhaust duct 34 in the width direction is limited due to the disposition of the lower burner 27 at the lower portion of the grill 22 and a sufficient exhaust sectional area cannot be secured. The flow of exhaust gas such as smoke generated from objects stays in the exhaust chamber 38 and smoothly moves to the grill storage 2.
2 is not discharged to the outside, and the combustion waste gas is excessively trapped in the grill storage 22 so that the combustibility is likely to be deteriorated.
When the above-described frame trap 33 is provided, there is a problem that these tendencies are further increased.

[0007] Further, since the high-temperature combustion waste gas is excessively trapped in the grill storage 22, the burning fat or the like accumulated in the pan 28 is overheated, and is not exhausted smoothly. Gap 47 and gallery 47
a, no fresh air outside is sucked in enough to cool the pan 28, and furthermore, the Bunsen-type lower burner 2
There was also a problem that the secondary air required for combustion of No. 7 was insufficient. In order to solve this problem, it is conceivable to increase the exit area of the exhaust chamber 36 as shown in FIG. However, even if the exhaust port 32 is widened in this way, although the exhaust resistance is slightly reduced, it is not sufficient.

An object of the present invention is to provide a cooking grill of this type, in which exhaust gas such as combustion waste gas of a gas burner used for heating a cooking object in a grill storage and smoke generated from the cooking object is provided. It is an object of the present invention to provide an exhaust structure of a grill storage that can reduce flow resistance and ensure good combustion. Another object of the present invention is to manufacture an exhaust duct at a low cost only by bending a single plate.

[0009]

According to the present invention, there is provided an exhaust structure for a grill storage according to the present invention, wherein a gas burner for heating and cooking an object placed on a grill is provided on an inner wall surface of the grill storage. An exhaust duct for exhausting the combustion waste gas of the gas burner and the smoke generated from the food is provided through a communication opening formed in a partition wall at a depth in the grill storage, and the communication opening is provided at an upper end thereof. The invention is characterized in that the width is formed in an inverted trapezoidal shape longer than the lower end width, and the exhaust duct is formed so as to gradually increase in diameter from the exhaust upstream side to the exhaust downstream side.

[0010] According to the exhaust structure for a grill storage according to the first aspect of the present invention having the above-described structure, an object to be cooked on the grill is heated and cooked by the combustion waste gas of the gas burner in the grill storage.
The combustion waste gas and the smoke generated from the food are guided to the exhaust duct through the communication port and discharged to the outside of the grill storage.
At this time, the exhaust duct is formed to have a diameter gradually increasing upward, so that the exhaust is smoothly exhausted with a small resistance. Further, since the communication port is formed in an inverted trapezoidal shape whose upper end width is longer than the lower end width, even if combustion waste gas or smoke generated from a cooked product is concentrated at the upper part of the communication port, it is also smooth. Exhausted. Further, the side wall and the rear wall of the exhaust duct can be formed by bending a single plate, and can be manufactured at low cost.

[0011] In this case, as described in claim 2, the communication opening formed in the partition wall at the depth in the grill storage is provided below the food to be mounted on the grill. Then, the convection heat generated by the combustion waste gas from the gas burner is trapped in the grill chamber and is sufficiently provided for heating the object to be cooked, and is generated from the combustion waste gas and the object to be cooked overflowing from the communication port to the exhaust chamber. Smoke and the like are discharged smoothly out of the grill storage.

Further, if the exhaust duct is formed in an inverted trapezoidal shape whose diameter gradually increases in the width direction of the grill storage, the space in the width direction can be utilized. The exhaust duct can be formed to have a gradually increasing diameter with a simple configuration without sacrificing the space in the depth direction and without affecting the arrangement of the burner and the like.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 9 shows an example in which the cooking grill according to one embodiment of the present invention is applied to a table stove. As shown, this table stove 10
Are stove burners 14a and 14b on the table top 12
Are arranged, and the surroundings are provided around them.
3b, put a cooking pot (not shown) on the stove 1
By operating the ignition plugs 18a and 18b provided on the front of the refrigeration unit 0, the respective stove burners 14a and 14b are ignited, and the cooking pots on the pits 13a and 13b are heated.

At the center of the stove 10 between the stove burners 14a and 14b, there is provided a cooking grill 20 for heating an object to be cooked, such as fish. 26 and an ignition plug 46 for the lower burner 27 are provided.

As shown in FIG. 1, in the grill storage 22,
A surface combustion type upper burner 26 for heating and cooking the object F by burning fuel gas in the upper stage, a grill 24 for placing the object F in the middle stage, and a foreground with the grill 24 being placed in the lower stage. And a tray 28 which can be slid out of the tray. A lower burner 27 of Bunsen combustion type is provided slightly below the grill 24.

In the depth of the grill storage 22,
Exhaust port 32 which is juxtaposed via a partition 30 and opened upward
An exhaust chamber 36 is formed by providing an exhaust duct 34 having the following. The exhaust port 32 is provided with the above-described perforated frame trap 33. This partition 3
A communication port 38 is provided at the opening 0 to communicate the grill storage 22 with the exhaust chamber 36. The communication port 38 is open at a position lower than the mounting surface of the object F on the grill 24. The communication port has an upper end width formed in an inverted trapezoidal shape from a lower end width. Here, the positional relationship between the mounting surface of the food F on the grill 24 and the upper end position of the communication port 38 is such that the high-temperature atmosphere due to the combustion waste gas around the food F causes oxygen that does not ignite the food F. It is set to be the density.

At the center of the front of the grill 22, a handle 42 is fixed integrally with the tray 28 and pulls the tray 28 forward.
Door 4 that opens and closes in conjunction with the tray 28 when the tray 28 is pulled out.
The opening and closing 44 is provided with a glass viewing window 4.
4a is provided. At this time, when the handle 42 is pulled out to the front, the tray 28 fixed to the handle 42 slides on the inner bottom surface of the grill 22 and the grill 24 placed on the tray 28 is simultaneously pulled out. In addition, a gap 4 for cooling air into the tray 28 when air flows in from the outside is provided on the bottom surface on the near side of the grill 22.
7 are provided.

The upper burner 26 is an all-primary air type having a combustion surface in which a number of small flame openings are passed through a plane plate made of porous ceramics, and the combustion surface is directed upward with respect to a vertical surface. And is provided on the upper left and right side surfaces of the grill storage 22. On the other hand, the lower burner 27 is a Bunsen-type burner in which the air required for combustion is not mixed with primary air and secondary air and generates less radiant heat. A crater row is formed on the inner edge portion of the grill by a nozzle body arranged along the depth direction of the grill storage 22. Further, a discharge portion of an ignition electrode (not shown) for igniting the fuel gas is provided so as to discharge across the ejected fuel gas.

As shown in FIG. 2, the ceiling of the grill warehouse 22 is located above the upper burner 26 in the grill warehouse 22 and at the center between the left and right burners, with its tip directed downward and an inclined surface in the burner direction. V-shaped exhaust guide section 48 with the
And the distribution plate 48 a is provided so as to protrude into the grill storage 22. The exhaust guide portion 48 and the distribution plate 48a are
It is provided for the purpose of guiding the combustion waste gas so that the object to be cooked F below the grill storage 22 is uniformly heated. Therefore, the size of the grill storage 22, the gas consumption, the inclination of the upper burner 26,
Depending on the position and size of the communication port 38, the exhaust guide portion 48
The height and angle of the inclined surface are appropriately set.

As shown in FIGS. 3 and 4, the exhaust chamber 36 is formed by an exhaust duct 34 so that its exhaust sectional area gradually becomes wider as it goes upward. An exhaust port 32 having a frame trap 33 having the same width as that of the conventional example is formed at the upper part.
The partition 30 has a communication opening 3 communicating with the exhaust chamber 36 so that the communication opening 3 communicates with the left and right side walls of the exhaust duct 34.
8 is formed in an inverted trapezoidal shape whose upper end width is longer than the lower end width. In this case, as shown in FIG. 5, the shape of the communication port 38 is formed in a rectangular shape having the same length at the upper end and the lower end as in the conventional example, and the lower part of the exhaust duct 34 forming the exhaust chamber 36 is formed at the lower part. Although a structure having a structure formed in accordance with the shape of the rectangular communication port 38 is conceivable, manufacturing the exhaust duct 34 in FIG. 6 from a single plate only by bending is a developed view of FIG. ) Is impossible. However, if the configuration shown in FIG. 4 is used, FIG.
As shown in (a), it can be manufactured only by bending from a single plate.

The communication port 38 shown in FIG. 3 and FIG.
Is formed in an inverted trapezoidal shape that gradually widens toward the upper end, so that the lower end width of the communication opening 38 becomes narrower than that of the conventional example, but the communication opening 38
Most of the flow of exhaust gas such as combustion waste gas and smoke generated from the cooked material overflowing to 8 is formed near the widened upper end of the communication port 38, so that it is more smoothly discharged. .

Next, the flow of combustion waste gas and exhaust gas will be described. First, when the ignition operation ignites the fuel gas ejected from the upper burner 26 on the left and right sides to start combustion, the high-temperature combustion waste gas accumulates in the upper part of the grill storage 22 and overflows into the lower communication port 38. To the exhaust chamber 36,
Due to the draft effect, the air is exhausted in the exhaust chamber 36. When the combustion is continued as it is, as shown in FIG. 2, the combustion waste gas flows toward the upper central portion due to the draft force and the injection power of the fuel gas, and the exhaust guide portion 48 and the distribution plate 48a each having a V-shaped cross section. Flows from above to below in the direction of the food F to be cooked.

In this case, the direction of the flow of the combustion waste gas is guided downward by the inclined surface of the exhaust guide portion 48, and the portion of the combustion waste gas away from the inclined surface is also guided by this flow and flows downward. Therefore, the combustion waste gas flows uniformly throughout the food F, and the food F contacting the combustion waste gas is uniformly heated. As described above, the food F is wrapped in the high-temperature combustion waste gas which is filled and uniformly convected without depending on the radiant heat of the upper burner 26, and the lower surface of the food F is the combustion heat of the lower burner 27. Cooked in

Since the upper burner 26 is an all-primary air burner that supplies all air required for combustion as primary air, good combustion is maintained even if the grill storage 22 is filled with combustion waste gas. In addition, since the upper burner 26 is inclined upward, radiant heating of the cooking object F and the baked fat stored in the pan 28 is weakened. In addition, at the same time, fresh air outside is sucked from the gap 47 in front of the grill storage by the draft effect of the exhaust chamber 36, cools the tray 28, and is discharged from the rear communication port 38. Even if not put, the grilled fat of the object to be cooked F falling on the saucer 28 does not ignite due to overheating.

At this time, although the width of the exhaust port 32 is the same as the conventional one, the exhaust chamber 36 is formed by the exhaust duct 34 into an inverted trapezoidal shape in which the exhaust sectional area gradually increases as it goes upward. Exhaust gas such as combustion waste gas rising from the exhaust chamber 36 and smoke generated from the food F flows out from the exhaust upstream side toward the exhaust downstream side without staying in the exhaust chamber 38. Therefore, the draft force of the exhaust gas can be more effectively obtained, and smooth discharge with less resistance can be achieved.

As described above, the convection heat generated by the combustion waste gas from the gas burner is stored in the grill storage 22 and sufficiently provided for heating the object to be cooked, and then the combustion waste gas overflowing from the communication port 38 into the exhaust chamber 36. And smoke generated from the cooking object F are smoothly discharged to the outside of the grill storage, so that stable combustion can be performed, and further, the cooking object F that comes into contact with the combustion waste gas.
Is heated and cooked while being wrapped in high-temperature combustion waste gas that fills the convection inside the grill chamber and is satisfactorily heated and cooked, and the heating efficiency of the object to be cooked F is improved. Moreover, the smooth flow of the exhaust gas facilitates the suction of fresh fresh air from the gap 47 and the gallery 47a in front of the grill storage, cools the tray 28, and is discharged from the rear communication port 38.
The cooling effect of the pan 28 is improved, so that the baking fat of the food F dropped on the pan 28 is prevented from overheating, and further, the lower burner 2
The use as secondary air required for combustion of 7 is also promoted.

The embodiment of the present invention has been described above.
The present invention is not limited to such embodiments at all, and it goes without saying that the present invention may be implemented in various modes without departing from the gist of the present invention. In short, it is only necessary that the exhaust duct forming the exhaust chamber is formed so as to gradually increase in diameter from the exhaust downstream side toward the exhaust upstream side.In the embodiment, the partition wall on the near side of the exhaust chamber and the rear wall on the rear side are vertically set. Although it is erected, it can also be implemented by inclining in the same or different directions, respectively, and the cross section of the exhaust duct may be circular or elliptical.

[0028]

According to the exhaust structure of the grill storage according to the first aspect of the present invention, the object to be cooked on the grill is heated and cooked by the combustion waste gas of the gas burner in the grill storage, and the combustion waste gas and the coating waste are removed. Smoke and the like generated from the cooked food are guided to the exhaust duct from the communication port and discharged to the outside of the grill warehouse.At that time, the exhaust duct is formed to have a gradually increasing diameter from the upstream side to the downstream side. As a result, the exhaust flow is smoothly exhausted with little resistance without interruption. Therefore, it greatly contributes to the improvement of the combustibility of the gas burner, it is possible to perform more stable combustion, and it is possible to efficiently heat and cook the object to be cooked. When a flame trap that blocks propagation and extinguishes the flame is provided at the exhaust port, the effect is greater. At this time, the communication port 38 is formed in an inverted trapezoidal shape whose upper end width is longer than the lower end width, so that the exhaust duct constituting the exhaust chamber can be simplified by bending one member, for example, one metal plate. And can be manufactured at low cost.

Also, as described in claim 2 of the present invention,
If the communication port opened in the partition wall at the depth of the grill storage is provided below the food placed on the grill, the convective heat generated by the combustion waste gas of the gas burner will be generated in the grill storage. After being warmed up enough to heat the food,
Combustion waste gas and smoke generated from cooked material overflowing into the exhaust chamber from the communication port rise up the exhaust chamber smoothly without resistance and are discharged out of the grill storage. Air is sufficiently sucked in to cool the pan, and high-temperature combustion waste gas is not excessively trapped in the grill chamber, so that ignition due to overheating of the burning fat or the like accumulated in the pan can be prevented. Further, when a Bunsen type lower burner is provided, the introduction of secondary air required for combustion is promoted, and the combustibility is also improved.

Further, as described in claim 3 of the present invention, if the exhaust duct is formed in an inverted trapezoidal shape whose diameter gradually increases in the width direction of the grill storage, a space in the width direction is used. By doing so, the exhaust duct can be formed in a gradually expanding shape without sacrificing the space in the depth direction, and further, without limiting the arrangement of the lower burner, etc.
The simple structure is economical because it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view in the depth direction of a cooking grill according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the cooking grill shown in FIG. 1 along the line AA according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view of the cooking grill shown in FIG. 1 taken along line BB according to one embodiment of the present invention.

FIG. 4 is a perspective view of the exhaust duct shown in FIG. 3;

FIG. 5 is a cross-sectional view of the cooking grill shown in FIG. 1 taken along line BB according to another embodiment of the present invention.

FIG. 6 is a perspective view of the exhaust duct shown in FIG.

FIG. 7 is a view showing an exhaust structure of a cooking grill according to a conventional example.

FIG. 8 is a view showing an exhaust structure of a cooking grill according to another conventional example.

FIG. 9 is an external perspective view of a table stove provided with a cooking grill generally conventionally known.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Cooking grill 22 Grill warehouse 26 Upper burner 27 Lower burner 30 Partition wall 32 Opening 34 Exhaust duct 36 Exhaust chamber 38 Communication port

Claims (3)

[Claims] A gas burner for heating and cooking an object placed on a grill is provided on an inner wall surface of a grill storage, and discharges combustion waste gas of the gas burner, smoke generated from the object to be cooked, and the like. An exhaust duct is provided through a communication opening formed in a partition wall at a depth portion in the grill storage, and the communication opening is formed in an inverted trapezoidal shape having an upper end width longer than a lower end width, and the exhaust duct is located closer to the exhaust upstream side. An exhaust structure of a grill storage, wherein the exhaust structure is formed so as to gradually increase in diameter toward an exhaust downstream side. 2. The communication port according to claim 1, wherein the communication port is provided below an object to be placed on the grill.
The exhaust structure of the grill storage described in the above. 3. The exhaust structure for a grill storage according to claim 1, wherein the exhaust duct is formed in an inverted trapezoidal shape whose diameter gradually increases in the width direction of the grill storage.