JP4203178B2 - grill - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grill for heating an object to be cooked such as fish in a heating cabinet.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a type of gas table stove that is a cooking device provided with a grill that can cook food such as fish. Such a grill is composed of a grill to place the food to be cooked, a saucer that slides forward while the grill is placed, a burner that burns fuel gas to heat the food to be cooked, and a heating chamber that houses these. Is done.
When the ignition operation is performed, the fuel gas ejected from the burner is ignited and combustion is started, and during cooking of the cooking object, the oil and fat content, that is, the grilled oil falls and accumulates in the tray. Go.
Such grills ignite when the baked oil is overheated by the radiant heat of the burner, and not only the food to be burnt by the combustion flame but also the flame may overflow from the exhaust port of the grill. For this reason, water is put in the tray in advance to prevent ignition by baking oil.
[0003]
However, it is very troublesome to put water in the saucer every time before cooking and drain it at the end of cooking. Moreover, if you forget to put water in the saucer or if the water has evaporated after repeated use for a long time, the baked oil collected in the saucer may be overheated by the radiant heat of the burner and ignite.
Therefore, the present applicant has previously filed an application that can prevent the burning or burning of baking oil even if there is no water in the tray.
That is, as shown in FIGS. 8 and 10, the combustion surfaces of the burners 13, 13 facing the central direction of the heating chamber 7 are directed slightly upward so as not to directly radiate the food, and the exhaust chamber A communication port 16 leading to 17 is provided below the grill net 9, and high temperature combustion exhaust gas is confined in the heating chamber 7 while reducing radiant heating to the baking oil accumulated in the receiving tray 10 below, and the food 12 This is a so-called waterless grill. With this configuration, the temperature of the baking oil can be lowered below the ignition point.
[0004]
However, when the burners 13 and 13 facing in the center direction from the side of the heating chamber 7 are arranged in this way, the heating temperature to the object to be cooked becomes closer to the center in proportion to the distance from the burners 13 and 13. Lower. For example, the surface of the cooking object 12 at the center of the cooking objects 12 such as fish arranged on the grill 9 is lower than the surfaces of the cooking objects 12 on the left and right by about 50 ° C. to 70 ° C. In some cases, uneven baking was caused between the center and the left and right.
Therefore, the present applicant has previously filed an application in which the temperature distribution in the heating chamber 7 is improved and the cooked food 12 arranged on the grill 9 can be baked evenly.
That is, as shown in FIG. 9, the left and right burners are provided by providing, along the depth direction, the exhaust guide portion 2 having a V-shaped cross section with a downward inclined surface formed on the left and right at the center of the ceiling surface of the heating chamber 7. Combustion exhaust gas ejected from 13 and 13 is confined in the upper part of the heating chamber 7, and the flow direction of the combustion exhaust gas is guided downward by the inclined surface of the V-shaped exhaust guide portion 2 and is separated from the inclined surface. Since the exhaust gas also flows downward along with this flow, the combustion exhaust gas becomes a uniform flow throughout the object to be cooked 12 and uniformly heats the object to be cooked 12 that contacts the combustion exhaust gas. That is, the flow of the combustion exhaust gas in contact with the object to be cooked 12 becomes uniform, and the object to be cooked 12 is heated with a uniform temperature distribution.
Therefore, the object to be cooked 12 is not heated by the radiant heat of the burner, but is heated and cooked by being wrapped in a high-temperature combustion exhaust gas that is uniformly convected, so that the object to be cooked 12 is baked deliciously. In addition, since the burners 13 and 13 are all primary air systems, combustion can be performed even if the combustion exhaust gas fills the heating chamber 7 and convects.
[0005]
[Problems to be solved by the invention]
However, recently, the widening of the grill has progressed, and if the direction of the flow of the combustion exhaust gas is only guided downward by the inclined surface of the V-shaped exhaust guide portion, the heating temperature to the object to be cooked still reaches the center portion. There was a problem that it became low and could not cope with widening of the grill.
Therefore, the grill of the present invention solves the above-mentioned problem, and heats the food by three members of the convective heat of the high-temperature combustion exhaust gas, the radiant heat from the burner, and the radiant heat from the top surface of the combustion exhaust gas, and at the same time the central portion of the combustion exhaust gas. The purpose of this is to provide a grill that eliminates the lack of baking near the center due to the widening of the grill by increasing the radiant heat of the grill.
[0006]
[Means for Solving the Problems]
A grill according to claim 1 of the present invention for solving the above-mentioned problems is provided.
A heating cabinet for storing cooked food and cooking;
An all-primary air burner that is provided on the left and right sides of the upper stage of the heating chamber and burns fuel gas;
In the heating chamber, a grill that is provided below the burner and places the food to be cooked,
An exhaust chamber that is arranged in parallel with the heating chamber and communicates from the heating chamber and discharges combustion exhaust gas,
In the grill that heats the food to be cooked by convection heat from the combustion exhaust gas by confining the combustion exhaust gas in the upper part of the heating chamber and forming a combustion exhaust passage so as to overflow the combustion exhaust gas from the communication port leading to the exhaust chamber,
The grill is provided with a radiation plate formed along the depth direction for rectifying combustion exhaust gas at the center of the ceiling surface of the heating chamber,
The radiation plate extends in the depth direction from the front of the ceiling of the heating chamber so as to be equal to or longer than the length of the left and right burners above the left and right burners in the heating chamber. The plate is formed to bulge downward in the center between the left and right burners, and has a flat surface that approaches the food to be cooked on the grill.
The grill is configured such that the combustion exhaust gas flows toward the upper center part of the grill, is rectified by the radiation plate bulging downward, flows from the upper side toward the lower cooking object, and is convected. The gist of the invention is that the widening of the grill can be dealt with by supplementing the heating in the vicinity of the center of the cooking object on the grill with the radiation plate provided to distribute the hot air from the combustion exhaust gas evenly in each part. .
[0007]
The grill according to claim 2 of the present invention for solving the above-mentioned problems is the grill according to claim 1,
Upper wire carrier radiation plate is summarized in that the formed bulges downwardly to a large radius of substantially arcuate cross section having a generally planar flat surface in the central portion.
[0008]
The grill according to claim 3 of the present invention for solving the above-mentioned problems is the grill according to claim 1,
Upper wire carrier radiation plate is summarized as that the cross section inverted trapezoidal shape having a planar flat surface in the central portion is formed by bulging downward.
[0009]
A grill according to claim 4 of the present invention for solving the above-mentioned problems is the grill according to any one of claims 1 to 3 ,
And summarized in that closes the upper surface of the radiation plate that bulges upward Symbol bottom side of a heat insulating plate for preventing heat radiation.
[0010]
The grill according to claim 1 of the present invention having the above-described configuration is heated by the convection heat of the high-temperature combustion exhaust gas convected while the combustion exhaust gas ejected from the left and right burners is confined in the upper part of the heating chamber, the direct radiant heat from the burner, and the combustion exhaust gas. Although the food to be cooked on the grill is heated by the radiant heat from the radiating plate, the central flat surface of the radiating plate that bulges downward increases the radiant heat in the center due to the combustion exhaust gas, and this flat surface is covered. Combined with the approach to the food, the hot air from the combustion exhaust gas is evenly distributed to the center.
Therefore, even if the grill is widened, the combustion exhaust gas is rectified by the radiation plate on the top surface, and the heating by the rectified combustion exhaust gas acts uniformly on the entire cooking object, and the cooking object has a uniform temperature distribution. And no unevenness of heating occurs.
[0011]
In the grill according to claim 2 of the present invention having the above-described structure, the left and right burners are formed so that the radiation plate bulges downward in a substantially arcuate cross section having a substantially flat flat surface at the center. The combustion exhaust gas from the rectifier and the concentration of radiant heat at the central portion by the flat surface can be effectively increased. As a result, even if the grill is widened, the food to be cooked is combined with the convection heat of the combustion exhaust gas and the radiant heat from the burner, and is heated under a uniform temperature distribution, so that there is no uneven burning.
[0012]
In the grill according to claim 3 of the present invention having the above-described configuration, the bulging portion of the radiation plate is formed by bulging downward in a substantially inverted trapezoidal shape having a flat flat surface at the center. The rectification of the combustion exhaust gas from the burner and the concentration increase of the radiant heat due to the flat surface to the center can be effectively performed. As a result, even if the grill is widened, the food to be cooked is heated under a uniform temperature distribution in combination with the convective heat of the combustion exhaust gas and the radiant heat from the burner, so that there is no uneven burning.
[0013]
In the grill according to claim 4 of the present invention having the above-described configuration, the upper surface of the radiating plate bulging downward is closed with a heat insulating plate for preventing heat dissipation, so that heat escapes upward and externally in combination with the presence of the intermediate air layer. To prevent. As a result, the radiation effect is significantly improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
In order to further clarify the configuration and operation of the present invention described above, preferred embodiments of the grill of the present invention will be described below.
[0015]
FIG. 10 shows an external perspective view of a gas table stove with a grill.
The table stove is provided with two sets of stove burners 4a and 4b on the top plate 3, and a cooking pan (see 6a in FIG. 3) is placed on the five virtues 5a and 5b provided around the upper surface of the table stove. When the operation buttons 20a and 20b provided on the front panel of the filter are pushed, the stove burners 4a and 4b are ignited, and the cooking pots on the five virtues 5a and 5b are heated.
[0016]
Moreover, the grill 1 for baking the to-be-cooked objects 12, such as fish, is provided between the said stove burners 4a and 4b, and cooking is performed by pushing the operation button 20c.
The grill 1 includes a heating chamber 7 provided between the gas table stove burners 4a and 4b, and the cooking object 12 such as fish is cooked in the heating chamber 7.
As shown in FIG. 3, the heating chamber 7 is provided with surface combustion type burners 13 and 13 for heating the cooking object 12 by burning fuel gas on the left and right sides of the upper stage, and the lower surface of the middle stage is covered. There is provided a tray 10 on which a grill 9 for placing the food 12 is placed, and a tray 10 that can be pulled out and stored by sliding it back and forth with the grill 9 placed on the lower stage.
[0017]
An exhaust chamber 17 having an exhaust port 31 opened upward is provided on the back of the heating chamber 7 through a partition wall 16a. The exhaust chamber 17 is open to the lower portion of the partition wall 16a and communicates with the heating chamber 7. A communication port 16 is provided, and the communication port 16 opens at a position lower than the placement surface of the cooking object 12 in the grill net 9.
[0018]
That is, the positional relationship between the placement surface of the cooking object 12 and the upper end position of the communication port 16 in the grill 9 is an oxygen concentration at which the atmosphere of the combustion exhaust gas around the cooking object 12 does not ignite the cooking object 12. Is set as follows. That is, when the placing surface of the object to be cooked 12 is provided above the position of the communication port 16, the combustion exhaust gas is trapped in the heating chamber 7 so as to wrap the object to be cooked 12 and the oxygen concentration around the object to be cooked 12 becomes low. . Therefore, the positional relationship between the burners 13 and 13, the grill 9, and the communication port 16 is set so that the oxygen concentration on the mounting surface of the object to be cooked 12 is 15% O ₂ concentration or less.
[0019]
At the center of the front of the heating chamber 7, there are provided a handle 6 that is fixed integrally with the tray 10 and that opens and closes the tray 10, and an open / close door 8 that opens and closes in conjunction with the loading and unloading of the tray 10. When pulled out, the tray 10 integrated with the handle 6 slides on the bottom surface of the heating chamber 7 and is pulled out together with the grill 9 placed on the tray 10, and the open / close door 8 is simultaneously opened. On the contrary, the open / close door 8 is closed simultaneously with the receiving tray 10 being stored. In addition, an air intake port 11 is provided on the bottom surface in front of the heating chamber 7 so that external air enters and cools the tray 10.
[0020]
The burners 13 and 13 are of a primary air type having a combustion surface in which an infinite number of small flame openings are penetrated through a porous ceramic flat plate, and the combustion surface is about 10 degrees above the vertical surface. And is provided on the upper left and right side surfaces of the heating chamber 7. The discharge portion 13b of the ignition electrode 13a that ignites the fuel gas is provided so as to discharge across the fuel gas ejected to the discharge plate 13c that also serves as a fixed plate for fixing the burner 13.
[0021]
As shown in FIGS. 1 and 2, the ceiling of the heating chamber is provided with a radiation plate 2 that also rectifies combustion exhaust gas to cope with the widening of the grill. The radiation plate 2 is formed by bulging downward in a substantially arcuate cross section having a substantially flat flat surface 2a at the center (see FIG. 1), and has a flat flat surface 2a at the center. High temperature combustion exhaust gas by intensively heating the central portion with radiant heat from the flat surface 2a heated by the combustion exhaust gas using a material having a substantially inverted trapezoidal cross section (see FIG. 2). Combined with the convection heat b and the radiant heat c from the burners 13, 13, each part of the cooking object 12 on the grill 9 is heated evenly.
The radiation plate 2 is formed to bulge downward in the center between the left and right burners 13, 13 above the burners 13, 13 in the heating chamber 7, and the flat surface 2 a at the center thereof is to be cooked on the grill 9. 12 approaches the central part. Therefore, depending on the size of the heating chamber 7, the amount of gas consumption, the inclination of the burners 13 and 13, and the position and size of the communication port 16, the bulging shape of the radiation plate 2, the lateral width l of the flat surface 2a, and the object to be cooked 12 And the like are appropriately set. For example, the width 1 of the flat surface 2a is preferably about 50 mm when the width of the heating chamber 7 is 230 mm to 250 mm, and the radiating plate 2 is longer than the length of the burners 13, 13. In parallel to the ceiling of the heating chamber 7 in the depth direction (see FIG. 3). Further, as the radiation plate 2, it is desirable to use a copper plate or an aluminized steel plate having good heat conduction and good radiation efficiency.
[0022]
As shown in FIGS. 6 and 7, if the upper surface of the radiation plate 2 is closed with a heat insulating plate 2b for preventing heat dissipation, wasteful heat dissipation is eliminated in combination with the presence of the air layer in the space d. Therefore, the radiation efficiency from the flat surface 2a is improved. If necessary, a heat insulating material may be interposed in the space d.
[0023]
In the above configuration, the hot air distribution state by the high-temperature combustion exhaust gas will be described.
First, when the combustion is started by igniting the fuel gas ejected from the burners 13 and 13 on both sides by the ignition operation, the high-temperature combustion exhaust gas accumulates in the upper part of the heating chamber 7 and overflows to the communication port 16 below. It flows into the exhaust chamber 17 and rises in the exhaust chamber 17 due to the draft effect, and is discharged from the exhaust port 31 to the outside. If the combustion is continued as it is, the combustion exhaust gas flows toward the upper center part by the draft force and the jet power of the fuel exhaust gas, and is rectified by the radiation plate 2 swelled downward to be directed from the upper side to the lower cooking object 12. To flow to convection. The convection heat b of the combustion exhaust gas heats substantially the whole of the object 12 to be cooked.
Then, the central part of the to-be-cooked object 12 is heated by the radiant heat a from the central flat surface 2a of the radiant plate 2 heated by the combustion exhaust gas, and in addition, the radiant heat c from the burners 13 and 13 can also be used. Heat up to a substantially central portion (see FIGS. 1, 2 and 6, 7).
For this reason, the whole to-be-cooked object 12 is uniformly heated with the convection heat b of high-temperature combustion exhaust gas, the radiant heat c from the burners 13 and 13, and the radiant heat a from the flat surface 2a of the radiant plate 2. Therefore, the lack of baking near the center of the object 12 due to the widening of the grill is eliminated.
[0024]
In addition, since these burners 13 and 13 are all primary air type burners which supply all the air required for combustion as primary air, even if the heating chamber 7 is filled with combustion exhaust gas, good combustion is maintained, Moreover, since the burners 13 and 13 are inclined upward, the radiant heating to the to-be-cooked object 12 and the baking oil accumulated in the saucer 10 becomes weak. In addition, because of the draft effect, fresh air outside is sucked from the air intake 11 at the front lower part of the heating chamber 7, and the saucer 10 is cooled and discharged from the rear communication port 16, so water is put into the saucer 10. Even if it does not exist, the baking oil of the to-be-cooked object 12 falling on the saucer 10 does not ignite by overheating.
[0025]
As described above, the cooking object 12 on the grill net 9 has the convection heat b of the combustion exhaust gas as the main flow, and the shortage is supplemented by the radiant heat a from the flat surface 2a of the radiation plate 2 so that the hot air from the combustion exhaust gas is burned. , 13 in combination with the radiant heat c from 13 so that each part can be evenly distributed to cope with the widening of the grille.
Therefore, not only grilled fish but also frozen foods such as gratin and pizza, and tempura and deep-fried food can be cooked uniformly in the wide grill.
Furthermore, since the cooking object 12 is heated by convection heat mainly containing combustion exhaust gas and radiant heat from the flat surface 2a heated by the combustion exhaust gas, the amount of heat in the combustion exhaust gas can be efficiently used. The gas consumption of the grill can be halved compared to the conventional one, and the inside of the heating chamber 7 can be efficiently heated, the temperature of the tray 10 can be kept low, and there is no need to put water into the tray 10. Convenient and safe to handle. Moreover, since water does not evaporate from the saucer 10 into the heating chamber 7, the to-be-cooked object 12 is crisp and baked, the baking time is the same as before, and the baking is more delicious. Furthermore, since the temperature of the saucer 10 can be lowered, the surface treatment of the saucer 10 can be made of fluorine coating that can be easily cleaned from the enamel.
[0026]
Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.
For example, in the embodiment, the radiation plate 2 has a large arcuate arc shape having a substantially flat flat surface 2a at the center or a substantially inverted trapezoid shape having a flat flat surface at the center. It is good also as arbitrary bulging shapes which have the rectification | straightening effect | action of waste gas. Of course, it can also be applied to a double-sided grill.
[0027]
【The invention's effect】
The present invention is implemented in the form as described above, and has the effects described below.
[0028]
According to the grill of the first aspect of the present invention, each part of the object to be cooked is uniformly heated by the convection heat of the high-temperature combustion exhaust gas, the direct radiant heat from the burner, and the radiant heat from the radiation plate heated by the combustion exhaust gas. Therefore, even if the grill is widened, the object to be cooked is heated under a uniform temperature distribution, and no uneven baking occurs.
[0029]
According to the grill of claim 2 of the present invention, since the radiation plate having a substantially arc-shaped cross section bulging downward and having a flat surface at the center is formed, the rectification of the combustion exhaust gas and the central portion of the radiant heat from the flat surface are achieved. Increase in concentration can be effectively performed.
[0030]
According to the grill of claim 3 of the present invention, since the radiation plate having a substantially inverted trapezoidal cross section having a flat surface at the center and a downward section is formed, the rectification of the combustion exhaust gas and the central portion of the radiant heat from the flat surface It is possible to effectively increase the concentration of
[0031]
According to the grill of the fourth aspect of the present invention, since the upper surface of the radiating plate bulging downward is closed by the heat insulating plate, useless heat dissipation is prevented and the radiation efficiency is improved.
[0032]
As described in detail above, the grill of the present invention can sufficiently cope with the widening of the grill.
[Brief description of the drawings]
FIG. 1 is a cut front view showing an example of a grill according to the present invention.
FIG. 2 is a cut front view of the radiation plate having different shapes.
FIG. 3 is a sectional side view of the same.
FIG. 4 is a perspective view showing an example of only a radiation plate.
FIG. 5 is a perspective view of a radiation plate having a different shape.
FIG. 6 is a cut front view showing an example when the upper surface of the radiation plate is closed.
FIG. 7 is a cut front view when the upper surface of a radiation plate having a different shape is closed.
FIG. 8 is a schematic cross-sectional view of a grill generally used in the past.
FIG. 9 is a schematic cross-sectional view of a grill previously filed by the applicant.
FIG. 10 is an external perspective view of a table stove.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Grill 2 ... Radiation board 2a ... Flat surface 7 ... Heating chamber 9 ... Grilling net 10 ... Sauce pan 12 ... To-be-cooked item 13 ... Burner 16 ... Communication port 17 ... Exhaust chamber

Claims (4)

A heating cabinet for storing cooked food and cooking;
An all-primary air burner that is provided on the left and right sides of the upper stage of the heating chamber and burns fuel gas;
In the heating chamber, a grill that is provided below the burner and places the food to be cooked,
An exhaust chamber that is arranged in parallel with the heating chamber and communicates from the heating chamber and discharges combustion exhaust gas,
In the grill that heats the food to be cooked by convection heat from the combustion exhaust gas by confining the combustion exhaust gas in the upper part of the heating chamber and forming a combustion exhaust passage so as to overflow the combustion exhaust gas from the communication port leading to the exhaust chamber,
The grill is provided with a radiation plate formed along the depth direction for rectifying combustion exhaust gas at the center of the ceiling surface of the heating chamber,
The radiation plate extends in the depth direction from the front of the ceiling of the heating chamber so as to be equal to or longer than the length of the left and right burners above the left and right burners in the heating chamber. The plate is formed to bulge downward in the center between the left and right burners, and has a flat surface that approaches the food to be cooked on the grill.
The grill is configured such that the combustion exhaust gas flows toward the upper center part of the grill, is rectified by the radiation plate bulging downward, flows from the upper side toward the lower cooking object, and is convected. It is possible to cope with widening of the grill by supplementing heating near the center of the cooking object on the grill with the radiation plate provided to distribute the hot air from the combustion exhaust gas evenly to each part. grill. Upper wire carrier radiation plate is grill according to claim 1, characterized in that the large radius of substantially arcuate cross section having a generally planar flat surface in the central portion is formed by bulging downward. Upper wire carrier radiation plate is grill according to claim 1, characterized in that it is formed by bulging downward cross section inverted trapezoidal shape having a planar flat surface in the central portion. Grill according to any of claims 1, characterized in that closes the upper surface of the radiation plate that bulges upward Symbol bottom side of a heat insulating plate for preventing heat radiation 3.

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