JP2000055369A - Gas grill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent a flame from overflowing from an exhaust opening, even in the case where an abnormal ignition occurs within a grill chamber. SOLUTION: A flame trap D comprises a lowermost stage quenching plate 15; an intermediate stage quenching plate 16 and an uppermost stage quenching plate 19 having an innumerable number of ventilation square holes to an outlet side of an exhaust passage for guiding a combustion gas in a grill chamber outside of the grill; spaces of which plates are widened gradually toward a downstream side. A flame is deprived of heat and cooled when passing through the ventilation holes of the quenching plates 15, 16, 19, and gets into an oxygen deficient state with a hydrocarbon gas produced from a cooking matter so that a quenching effect is enhanced and the flame can be surely prevented from overflowing from an exhaust opening 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas grill for cooking food such as fish in a grill storage.

[0002]

2. Description of the Related Art Conventionally, a gas stove is known which incorporates a gas grill for heating and cooking an object to be cooked, such as a fish, in a grill cabinet. An all-primary pneumatic burner comprising a grill for placing objects, a saucer for receiving baking oil, etc. from the object to be cooked, and a flame hole for fuel gas combustion formed vertically on the upper side surface of the grill storage. In the back of the grill storage, there is an exhaust passage that guides the flue gas generated by combustion to the outside of the grill, and when cooking, put a certain amount of water in the saucer in advance and start heating, A gas grill (not shown) that prevents the ignition of the grilled oil by dropping oil, fat, or grilled oil from cooking objects such as fish baked on the water surface,
All primary air burners 4 installed on the upper side of the grill storage 1
The combustion surface of the grill is directed obliquely upward, and a communication port 7 to the back exhaust chamber 6 of the grill storage 1 is provided below the surface of the grill 2 for placing the objects to be cooked. The combustion exhaust gas in the grill storage 1 is convected downward from above while reducing the heating to the oil, and the cooking object on the grill 2 is heated and cooked by the convection heat without impairing the cooking performance. There is a so-called waterless grill (see FIG. 11) that can lower the temperature of the grilling oil to below the ignition point and can prevent ignition due to overheating without filling the saucer 3 with water.

[0003]

However, even with the above-mentioned waterless grill, an object to be cooked with a large amount of fats and oils (for example, a shrimp herring) may itself ignite. Such a thing is unlikely to occur in normal use. However, if a fire occurs, the flame in the grill cabinet may overflow from the exhaust port to the outside, and it has been pointed out that there is a risk of fire.

Therefore, the applicant of the present invention has previously provided a frame trap D made of a perforated plate at the outlet of the exhaust passage 6 so as to extinguish the flame by the frame trap D even if fire occurs in the grill storage. The gas grill of the present invention further enhances the quenching effect, as disclosed in Japanese Patent Application Laid-Open No. 9-72546.
For example, an object of the present invention is to provide a gas grill with enhanced safety by reliably extinguishing flames even in a body of herring that is easily ignited.

[0005]

According to a first aspect of the present invention, there is provided a gas grill, comprising: a burner for heating an object to be cooked in a grill storage by burning fuel gas; and a combustion exhaust gas in the grill storage. Frame having a plurality of flame-extinguishing members having a predetermined number of air-extinguishing members having an infinite number of ventilation holes that do not clog near the outlet of the exhaust passage. The gist is that it is provided.

According to a second aspect of the present invention, there is provided a gas grill according to the first aspect, wherein the interval between the flame extinguishing members of the frame trap is gradually increased toward the downstream side. .

According to a third aspect of the present invention, there is provided a gas grill according to the first aspect, wherein the size of the flame extinguishing member of the frame trap is gradually reduced toward the downstream side. I do.

According to a fourth aspect of the present invention, there is provided a gas grill according to the first, second, and third aspects, wherein the cooling air flows outside the exhaust passage near an outlet thereof. Is the gist.

According to a fifth aspect of the present invention, there is provided a gas grill according to the first, second, and third aspects, wherein air is prevented from flowing into the exhaust passage near an outlet thereof. And

[0010] The gas grill according to the first aspect of the present invention having the above-described structure is provided with a plurality of flame-extinguishing members having a predetermined number of air-extinguishing members having an infinite number of ventilation holes near the outlet of the exhaust passage. In the event of a fire in the grill, the flame is deheated and cooled when passing through the vents of multiple fire extinguishing members, and the flame gradually becomes smaller and becomes deficient in oxygen, preventing the propagation of the flame and extinguishing it. Is done. As a result,
Flame does not spill out of the exhaust.

In the gas grill according to the second aspect of the present invention having the above structure, the interval between the flame extinguishing members of the frame trap is formed so as to be gradually widened toward the downstream side, so that the flame extinguishing member on the upstream side is connected to the flame extinguishing member on the downstream side. The amount of heat transfer is gradually reduced by heat removal and cooling by the ventilation holes through the space. As a result, the effect of cooling and extinguishing the flame is enhanced. Further, between the respective flame-extinguishing members, the hydrocarbon exhaust gas and the hydrocarbon gas generated from the object to be cooked such as fish gradually become trapped, so that the flame-extinguishing effect due to the lack of oxygen can be obtained.

In the gas grill according to the third aspect of the present invention having the above-described structure, the size of the flame-extinguishing member of the frame trap is gradually reduced toward the downstream side. In combination with the reduction in the amount of heat transfer, there is no difference in the flame-extinguishing effect in performance due to the difference in the expansion of the combustion exhaust gas due to the temperature. As a result, the size of the flame trap can be reduced as the flame-extinguishing member reaches the downstream side, so that the size of the frame trap can be reduced.

In the gas grill according to a fourth aspect of the present invention having the above-described structure, the cooling air flows to the outside near the outlet of the exhaust passage. Will be encouraged. As a result, the quenching effect is significantly improved.

The gas grill according to the fifth aspect of the present invention having the above-described structure is formed so that air does not flow in near the outlet of the exhaust passage, so that the promotion of the flame due to the supply of oxygen is prevented. As a result, the quenching effect is further improved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, an example of a preferred embodiment of a gas grill of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a gas grill incorporated in a gas table stove. The gas grill includes a grill 2 for placing an object to be cooked in a grill cabinet 1 and grilled oil from the object to be cooked. A tray 3 for receiving fuel, a burner 4 for burning fuel gas is provided on an upper side surface of the grill storage 1, and an exhaust port 5 for opening a combustion exhaust gas generated by combustion to the outside at the back of the grill storage. An exhaust passage 6 for guiding the
A communication port 7 that connects the grill storage 1 and the exhaust passage 6 is formed in a lower portion of a rear surface of the grill storage 1.

The communication port 7 is formed at a position lower than the surface on which the food is placed in the grill 2 and the high-temperature combustion exhaust gas generated from the burner 4 is temporarily stored in the upper part of the grill chamber 1 to heat the food. Thereafter, the air overflows into the exhaust passage 6 through the communication port 7. Further, an air inlet 8 through which outside air can enter is formed on the bottom surface on the front side of the grill storage 1, and the combustion exhaust gas overflowing in the exhaust passage 6 rises due to the draft effect so that the outside air is sucked. I have.

The burner 4 is an all-primary pneumatic radiant burner having a combustion surface formed by penetrating a large number of small flame holes in a flat plate made of porous ceramics. The combustion surface is slightly inclined with respect to the vertical plane. It is installed at an angle in the direction.
Reference numeral 9 denotes a grill door for opening and closing the front opening of the grill storage 1, which automatically opens and closes in conjunction with the insertion and removal of the pan 3, and the handle 10 of the pan 3 opens and closes the front opening of the grill storage 1. . Reference numeral 11 denotes an ignition electrode, and 12 denotes a thermocouple that generates a thermoelectromotive force by combustion heat. The ignition electrode 11 and the thermocouple 12 are provided on the near side of the burner 4 (the front side of the grill storage 1). .

In the gas grill, the object to be cooked is heated and cooked by convection heat by inclining the burner 4 in the upward direction, thereby reducing the radiant heating of the roasting oil accumulated in the receiving pan 3. By cooling the tray 3 by the flow of the outside air sucked from the air inlet 8 on the side bottom surface to the communication port 7,
The temperature rise of the baking oil accumulated in the pan 3 is suppressed, and cooking can be performed without putting water in the pan 3. The cooking object placed on the mounting surface of the grill 2 is heated and cooked by the convection of the high-temperature combustion exhaust gas filling the upper part of the grill storage 1 without relying on the radiant heat of the burner 4.

Near the outlet of the exhaust passage 6, there is provided a frame trap D for preventing the flame from overflowing from the exhaust port 5. As shown in FIGS. 4 and 6, for example, the frame trap D is formed by holding both ends of two metal plates 14 made of stainless steel or the like having countless rectangular ventilation holes 13 of a size that does not cause clogging. The two-stage extinguishing plates 15 and 16 formed into a cylindrical rectangular parallelepiped are bent at substantially right angles, and are joined to face each other. By arranging them, the lowermost extinguishing plate 15 and the intermediate extinguishing plate 16 having a predetermined interval A1 function as well, and, for example, as shown in FIGS. A one-stage flame-extinguishing plate 19 formed by bending both ends of a single metal plate 18 made of stainless steel or the like having an infinite number of square vent holes 17 of Located above the extinguishing plates 15 and 16 In the upper part of the exhaust passage 6 near the outlet, four sides excluding the upper and lower surfaces are in contact with the exhaust passage 6 and the two-stage extinguishing plates 15 and 16, that is, the lowermost extinguishing plate 1
Spacing A2 wider than the spacing A1 between 5 and the intermediate flame stabilizing plate 16
Is provided so as to function as the uppermost flame extinguishing plate 19, and is provided with three stages of flame extinguishing plates 15, 16, 19 near the outlet of the exhaust passage 6.

The lowermost extinguishing plate 15 and the intermediate extinguishing plate 1
According to the experimental results, the square vents 13 of No. 6 and the square vents 17 of the uppermost flame extinguishing plate 19 are formed by forming countless square vents 13 and 17 having a side of 3 mm at an interval of 1 mm. The clogging does not occur and the uppermost extinguishing plate 19
It can be seen that even if the size B2 is smaller than the size B1 of the flame extinguishing plates 15 and 16 between the lowermost stage and the middle stage, there is no difference in performance due to the difference in expansion of the combustion exhaust gas, and the frame trap D can be downsized. .

Cooling air flows from outside air inlets 20 and 21 provided on the upper and lower sides of the body to the outside of the exhaust passage 6 near the outlet (see arrows a in FIGS. 1 and 2). By cooling the frame trap D also from the outside, the efficiency of heat removal and cooling of the combustion exhaust gas is enhanced, and the air holes near the outlet of the exhaust passage 6, that is, at least the air holes 22 above the grid 2 are removed. All are closed by the closing plate 23 so that air serving as an oxygen supply for promoting combustion does not flow near the outlet of the exhaust passage 6 so as to enhance the oxygen deficiency effect.

In the above configuration, all of the combustion exhaust gas flowing through the exhaust passage 6 has the rectangular vent holes 13 formed in the lowermost flame extinguishing plate 15, the middle flame extinguishing plate 16, and the uppermost flame extinguishing plate 19 of the frame trap D, respectively. The air is exhausted from the exhaust port 5 through the exhaust port 17. So, frame trap D
Explaining the quenching effect of the flame, the propagation of the flame is caused by the transfer of heat from the combustion gas to the gas beforehand, so the heat is removed to prevent the flame from propagating and extinguish the flame. That is, when the flame from the grill storage 1 passes through the rectangular ventilation holes 13 of the flame extinguishing plate 15 at the lowermost stage of the frame trap D, it comes into contact with the inner wall of the rectangular ventilation holes 13 and heat is taken away. At this time, when the lowermost extinguishing plate 15 is at a high temperature, the flame cannot be cooled sufficiently and cannot be completely extinguished, but the lower extinguishing plate 15 is provided with a predetermined interval A1. The middle extinguishing plate 16 is cooled by the middle extinguishing plate 16 which is kept at a relatively low temperature in order to reduce the amount of heat transferred from the lowermost extinguishing plate 15 to the middle extinguishing plate 16 in the space defined by the interval A1. The uppermost extinguishing plate 19 provided at a predetermined distance A2 from the middle extinguishing plate 16.
Is a space defined by an interval A2 wider than the interval A1 between the lowermost flame extinguishing plate 15 and the middle flame extinguishing plate 16,
In order to further reduce the amount of heat transfer from 6 to the uppermost extinguishing plate 19, the flame is further cooled by the uppermost extinguishing plate 19 kept at a low temperature, and combined with the cooling action by cooling air from the outside, the flame is surely formed. To extinguish the flame. In addition, each of the extinguishing plates 15, 16, which gradually become wider toward the downstream side,
Since the combustion exhaust gas and the hydrocarbon gas generated from the object to be cooked gradually become trapped in the space between 19 and there is no inflow of air serving as an oxygen supply, a flame-extinguishing effect due to lack of oxygen can be obtained. As described above, by adding the quenching effect due to lack of oxygen while improving the cooling effect, a sufficient quenching effect can be obtained even if the area of the rectangular ventilation holes 13 and 17 is increased to such an extent that it does not clog.

Therefore, in the gas grill, the burner 4
Burns, high-temperature combustion exhaust gas accumulates in the upper part of the grill chamber 1 and overflows from the communication port 7 to the exhaust passage 6 to ascend the exhaust passage 6 by a draft effect. The air passes through the rectangular vent holes 13, 17, 15, 16, and 19, and is discharged from the exhaust port 5 to the outside. At the same time, due to the draft effect, the outside air is sucked from the air inlet 8 on the bottom surface on the front side of the grill storage 1 and discharged from the rear insertion port 7. On the other hand, the object to be cooked is cooked everywhere by the convection of the high-temperature combustion exhaust gas filling the upper part of the grill storage 1.

In the event that the burning oil or the like accumulated in the receiving pan 3 is abnormally overheated and ignited due to excessive combustion, the flame of the grill storage 1 spreads to the exhaust passage 6 side. The flame is extinguished by the flame trap D provided near the exit of the passage 6 and the flame overflow from the exhaust port 5 is prevented. That is, the frame trap D is composed of three stages of the flame extinguishing plate 15, ie, the lowermost extinguishing plate 15, the middle extinguishing plate 16 and the uppermost extinguishing plate 19, and the interval between the extinguishing plates becomes lower (upward). As the heat spreads gradually, the amount of heat transferred to the flame-extinguishing plate decreases gradually along with the cooling action from the outside by the cooling air, and the cooling efficiency of the flame is increased. In the space, the combustion exhaust gas and hydrocarbon gas generated from the food to be cooked tend to be trapped toward the downstream side, and the quenching effect due to lack of oxygen is gradually increased. Therefore, each extinguishing plate 15, 1
Even if the layers 6 and 19 are successively made smaller toward the downstream side (upward) (B1> B2), a sufficient quenching effect can be obtained.
According to the results of the experiment, when burning the herring that has the highest oil content and is likely to produce a flame, the flame extinguishing through the exhaust port 5 occurs in the two-stage extinguishing plate consisting of the extinguishing plate 15 at the bottom and the extinguishing plate 16 at the middle. Although the overflow occurred (when the saury was baked, the flame did not overflow), when the three-stage extinguishing plate of the above embodiment was used, there was no flame overflow from the exhaust port 5, and the danger of the flame overflow was complete. It turned out to be prevented.

If the flame extinguishing plates 15, 16 and 19 of the frame trap D are coated with an oxidation catalyst (for example, belovskite) which promotes the decomposition of odor and smoke, the odor and smoke generated from the cooked object can be obtained. And the like can be decomposed and removed by a catalytic effect, and the clogging of the rectangular vents 13 and 17 can also be effectively prevented by the decomposing and removing action of such a catalyst. Further, in the above-described embodiment, the three-stage flame extinguishing plate is provided at a predetermined interval. However, if four or more stages are provided, the effect becomes more remarkable. In this case, the condition is that the air permeability is not impaired. The three or more quenching plates need not necessarily be provided in parallel, and may be provided at an angle. In addition, the ventilation holes 13, 17 of each of the flame extinguishing plates 15, 16, 19, respectively.
Is not limited to a quadrangle, and may be, for example, a circle, a triangle, a hexagon, a rhombus, or an irregular shape. Also, 3
The positions of the ventilation holes 13 and 17 formed in the extinguishing plates 15, 16 and 19, respectively, may be formed at the same position as each other or may be shifted. In addition, three or more stages of the flame extinguishing plate 15,
The sizes of the ventilation holes 13 and 17 formed in the respective 16 and 19 may be different.

The flame extinguishing plate 15 of the frame trap D,
As the metal plates 16 and 19, in addition to the metal plates 14 and 18 of the embodiment in which the countless rectangular air holes 13 and 17 are formed, for example, a wire mesh 24 shown in FIG. 7 may be used.
A lath net 25 shown in FIG. 8 may be used. Also,
As shown in FIG. 9, a corrugated tape 26b also made of one long metal foil is joined to one surface of a base tape 26a made of one long metal foil, and is formed into a spiral or spiral shape. It may be a ventilation member 26 formed in a spiral shape. Further, the flame extinguishing plates 15, 16, and 19 may be processed into a corrugated or crank shape, and may be made of ceramics as well as metal.

Although an example of the embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and may be implemented in various forms without departing from the gist of the present invention. Of course.

[0029]

The gas grill of the present invention is embodied in the form described above, and has the following effects.

According to the gas grill according to the first aspect of the present invention, since a plurality of flame-extinguishing members having countless ventilation holes at a predetermined interval are provided so as not to be clogged near the outlet of the exhaust passage, the grill storage is provided. Even if the fire ignites inside, when the flame passes through the ventilation holes of the multiple fire extinguishing members, it is deheated and cooled, reducing the amount of heat transfer to the downstream side and increasing the flame cooling efficiency,
In addition, the flame gradually becomes smaller and a flame-extinguishing effect is obtained by the lack of oxygen in the space between the respective flame-extinguishing members, so that the propagation of the flame is stopped and the flame is extinguished immediately. Therefore, the flame does not overflow from the exhaust port and is safe.

According to the gas grill according to the second aspect of the present invention, since the interval between the flame extinguishing members of the frame trap is formed so as to gradually increase toward the downstream side, the amount of heat transferred from the upstream flame extinguishing member to the downstream side flame extinguishing member. Is gradually reduced by heat removal and cooling by ventilation holes through the space, the cooling and quenching effect of the flame is enhanced, and between each quenching member, hydrocarbon gas generated from combustion exhaust gas and fish and other cooking objects The quenching effect gradually increases due to the lack of oxygen. Therefore, even a herring that is easy to ignite is safe without any overflow of flame.

According to the gas grill of the third aspect of the present invention, since the size of the flame-extinguishing member of the frame trap is gradually reduced toward the downstream side, the amount of heat transfer from the upstream side to the downstream-side flame-extinguishing member is reduced. In combination with this, the difference in expansion of the combustion exhaust gas depending on the temperature eliminates the difference in the quenching effect in performance. Therefore, a large installation space is not required since the frame trap having the flame-extinguishing members in multiple stages can be reduced in size.

According to the gas grill of the fourth aspect of the present invention, since the cooling air is formed so as to flow to the outside near the outlet of the exhaust passage, the heat removal and cooling of the flame by the multi-stage extinguishing member are promoted. The quenching effect by the frame trap is further enhanced.

According to the gas grill of the fifth aspect of the present invention, since the air is formed so as not to flow toward the outlet of the exhaust passage, the promotion of the flame due to the supply of oxygen is prevented, and the flame extinguishing effect by the frame trap is improved. improves.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an example of a gas grill of the present invention.

FIG. 2 is a sectional view of only a frame trap portion of a main part.

FIG. 3 is an enlarged cross-sectional view of an uppermost extinguishing plate in a frame trap.

FIG. 4 is an enlarged cross-sectional view of a state where a middle flame extinguishing plate and a lowermost flame extinguishing plate are combined in a frame trap.

FIG. 5 is a perspective view of the uppermost flame extinguishing plate in the frame trap.

FIG. 6 is a perspective view of a state in which a middle flame extinguishing plate and a lowermost flame extinguishing plate in a frame trap are combined.

FIG. 7 is a partial perspective view showing a wire mesh as another example of the flame extinguishing plate.

FIG. 8 is a partial perspective view showing a lath net as another example of the flame extinguishing plate.

FIG. 9 is a perspective view showing a ventilation member as another example of the flame extinguishing plate.

FIG. 10 is a longitudinal side view of a gas grill according to the prior application of the applicant.

FIG. 11 is a vertical sectional side view showing the waterless grill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Grill storage 6 ... Exhaust passage D ... Frame trap 15 ... Lower flame extinguishing plate 16 ... Middle flame extinguishing plate 19 ... Uppermost flame extinguishing plate

Claims (5)

[Claims] 1. A gas grill, comprising: a burner for heating an object to be cooked in a grill storage by burning fuel gas; and an exhaust passage serving as a passage for guiding combustion exhaust gas in the grill storage to the outside of the grill storage. A gas trap provided with a plurality of flame-extinguishing members having a predetermined number of flame-extinguishing members having an infinite number of ventilation holes near the outlet of the fuel cell. 2. The gas grill according to claim 1, wherein the interval between the flame extinguishing members of the frame trap is gradually increased toward the downstream side. 3. The gas grill according to claim 1, wherein the size of the flame-extinguishing member of the frame trap is gradually reduced toward the downstream side. 4. The gas grill according to claim 1, wherein the cooling air is formed so as to flow to the outside near the outlet of the exhaust passage. 5. The gas grill according to claim 1, wherein air is prevented from flowing into an outlet of the exhaust passage.