JPH0736612Y2 - grill - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grill equipped with a lower fire burner.

[0002]

2. Description of the Related Art Conventionally, it is known that lower flame burners are provided on both sides of a lower side of a heating chamber, each of which has a flame port toward the center of the heating chamber.

[0003]

In this case, it is necessary to secure a certain amount of space to diffuse the hot air in order to increase the heating area and make the heat distribution uniform. However, in a grill where the size of the heating chamber is restricted, such as a grill built into a table hob, it is not possible to provide sufficient space for diffusing the hot air. Therefore, there is a problem that burnt spots easily occur. The present invention aims to obtain a grill without such a defect.

[0004]

To achieve the above object, the present invention provides a grill according to claim 1 in which lower flame burners are provided on both lower sides of the heating chamber so that the flame outlets are directed toward the center of the heating chamber. At the same time, in a grill provided with a grill on which the food to be cooked is placed, the burning ability of both lower-flame burners is switched alternately between the strong-burning state and the weak-burning state. It is characterized by having done.

According to the second aspect of the present invention, there is provided a lower-firing burner having flame outlets directed toward the center of the heating chamber on both sides below the heating chamber, and a grill for placing an object to be cooked is provided above it. In the grill, the flame mouth sides of the lower fire burners are swung up and down.

In the grill according to the third aspect of the present invention, lower flame burners having flame openings toward the center of the heating chamber are provided on both sides of the lower side of the heating chamber, and a grill for placing an object to be cooked is provided above it. In the grill, an air flow is formed toward the center of the heating chamber along the lower fire burners, and the air flow is switched between strong and weak.

According to another aspect of the present invention, there is provided a lower-firing burner having flame openings directed toward the center of the heating chamber on both sides below the heating chamber, and a grill for placing the object to be cooked thereon is provided above the lower-burning burner. In the grill, an air flow directed toward the center of the heating chamber along the upper side and the lower side of both lower fire burners is alternately formed vertically.

According to another aspect of the present invention, there is provided a lower flame burner having flame openings directed toward the center of the heating chamber on both sides of the lower side of the heating chamber, and a grill for placing an object to be cooked is provided above it. In the grill, the amount of primary air supplied to both lower fire burners is changed.

According to a sixth aspect of the present invention, there is provided a grill according to the first aspect, in which both lower-flame burners have a cooking mode in which a combustion time is long in a strong combustion state and a combustion time is short in a weak combustion state, and a strong combustion state. It is characterized in that it is possible to switch to a cooking mode in which the combustion time is short and the combustion time is long in the weak combustion state.

[0010]

In the grill according to claim 1 having the above structure,
When the lower heat burner is in the strong combustion state, the hot air extends to the center position of the heating chamber, and when the lower combustion burner is in the weak combustion state, the hot air is near the side wall of the heating chamber. It can be spread over the entire cooked food.

In the grill according to the second aspect, the hot air from the lower fire burner can be alternately passed to the side wall side and the center side of the heating chamber by swinging the flame mouth side of both lower fire burners up and down. Therefore, the hot air can be spread over the entire food.

In the grill according to the third aspect of the present invention, the hot air from the lower flame burner can be alternately guided to the side wall side and the central side of the heating chamber by alternately switching the air flow between strong and weak. Therefore, the hot air can be spread over the entire object to be cooked.

According to another aspect of the present invention, when an air flow is formed along the upper side of the lower heat burner toward the center of the heating chamber, the air flow suppresses hot air from the lower heat burner. When an air flow is formed toward the center of the heating chamber, but towards the center of the heating chamber along the underside of the lower heating burner, the air flow causes hot air from the lower heating burner to reach near the side wall of the heating chamber. Therefore, by repeating this alternately, the hot air can be spread over almost the entire object to be cooked placed on the grill.

In the grill according to the fifth aspect, when the primary air supply amount to both lower-flame burners is increased, the flame becomes sharp from both lower-flame burners and extends in the direction toward the flame mouth to heat the hot air. Heading toward the center of the chamber, if the primary air supply is reduced, the flame rises and hot air spreads near the side wall of the heating chamber. Therefore, by repeating this alternately, the hot air can be spread over almost the entire object to be cooked placed on the grill.

In the grill according to the sixth aspect, by alternately switching both lower-burning burners to a strong combustion state and a weak combustion state,
In a grill that allows hot air to be spread over the entire object to be cooked, cooking can be performed under different amounts of heat by switching the cooking mode.

[0016]

Embodiments of the present invention will be described first with reference to the embodiments shown in FIGS. In the figure, reference numeral 1 shows a heating chamber having an inlet / outlet 2 for an object to be cooked X and an exhaust port 3 at an upper rear portion thereof. Inside the heating chamber 1, an upper fire burner 4 is provided at an upper portion of the heating chamber 1 at both lower sides thereof. The lower flame burners 5a, 5b each having a flame opening a toward the center of the heating chamber 1 are provided.
Above the 5b, that is, in the middle of the heating chamber 1, there is provided a grill 6 on which the material to be cooked X is placed. Reference numeral 7 indicates a door that closes the entrance / exit 2, and reference numeral 8 indicates a juice saucer provided in the heating chamber 1.

In this embodiment, both lower fire burners 5 are used.
The combustion capabilities of a and 5b are alternately switched at regular time intervals so that the combustion in one burner 5a is in a strong combustion state and the combustion in the other burner 5b is in a weak combustion state. 4, the throttles 10a and 10b are provided in the gas passages 9a and 9b connected to the lower combustion burners 5a and 5b, respectively, as shown in FIG.
A connection passage 1 for providing a bypass passage 11 for bypassing b and connecting the bypass passage 11 to each gas passage 9a, 9b
2a and 12b are provided with on-off valves 13a and 13b,
By alternately opening and closing the on-off valves 13a and 13b, when the combustion in one burner 5a is in a strong combustion state, the other burner 5
The combustion in b was set to a weak combustion state, and the hot air was spread over the entire object to be cooked X as much as possible to eliminate the burning spots.

The combustion can be switched to the strong combustion state and the weak combustion state alternately at regular time intervals by microcomputer control, or by opening / closing valves 13a, 1 shown in FIG.
3b is an electromagnetic valve, and the switch S1 interposed in the operating circuit thereof is controlled to open and close by the rotary cam body C shown in FIG. 6 to change the gas amount. Also, the time ratio at that time is
It is not limited to one-to-one. For example, the strong combustion state is 5 and the weak combustion state is 1 so that hot air does not spread over the entire food to be cooked X and burnt spots do not occur.

In FIG. 4, 14 is both lower fire burners 5a, 5
b is a burner for transfer of heat, 15 is a burner for transfer of heat which is interposed between the upper burner 4 and the lower burner 5a, 16 is a gas supply passage which is connected to both burners 14 and 15 for transfer of fire, 17 is a main valve common to these gas supply passages, 18
a is an open / close valve for the upper fire burner 4, 18b is a lower fire burner 5
The on-off valve for a and 5b is shown.

In the above-mentioned embodiment, the on-off valves 13a, 1
By alternately opening and closing 3b, when the combustion in one burner 5a is in a strong combustion state, the combustion in the other burner 5b is in a weak combustion state.
By alternately repeating the closed state and the open state of b at the same time so that both burners 5a and 5b are simultaneously switched to the strong combustion state and the weak combustion state, hot air can be spread over the entire cooking object X. It can be spread across to eliminate burn marks.

FIG. 7 shows a modified example of the gas supply passage shown in FIG. 4, in which the gas passage 9 connected to the lower fire burners 5a and 5b is connected.
a and 9b are provided with throttles 10a and 10b, respectively, and a three-way valve 19 is interposed at the connecting portion between the bypass passage 11 and the connecting passages 12a and 12b. As shown in (b), when the combustion in one burner 5a is a strong combustion state by alternately switching between the state in which one of the lower fire burners 5a is connected and the state in which the other lower fire burner 5b is connected, The combustion was set to a weak combustion state.

When the three-way valve 19 is switched to the position shown in FIG. 8C, the fuel is supplied to the lower-flame burners 5a and 5b only through the throttles 10a and 10b. Combustion state.

Other configurations are not particularly different from those shown in FIG. FIG. 9 shows an embodiment in which a three-way valve 19 having a T-shaped passage is used so that both burners 5a and 5b can be simultaneously switched between a strong combustion state and a weak combustion state. Explaining this, the fuel from the bypass passage 11 and the fuel that has passed through the throttles 10a and 10b in the three-way valve 19 are passed through the gas passages 9a and 9b, and both lower fire burners 5a and 5b.
If both of the lower fire burners 5a and 5b are in a strong combustion state at the same time, the three-way valve 19 restricts the throttle 10a,
If only the fuel that has passed through 10b is supplied to both lower-flame burners 5a and 5b through gas passages 9a and 9b, both lower-flame burners 5a and 5b are simultaneously in a weak combustion state. Therefore, by alternately switching the three-way valve 19 at regular intervals, a strong combustion state and a weak combustion state can be obtained alternately.

The inflow of air into both lower fire burners 5a, 5b is made only from the upper side of both lower fire burners 5a, 5b, and lower fire burners 5a, 5b and eaves 35 shown in FIGS. If a current plate 36 is provided between the air flow windows 36a and the air flow windows 36a are provided at intervals, the hot air may reach the center of the air passing through the air passage window 36a.

Further, in the above embodiment, the ignition is performed when both the lower-firing burners 5a and 5b are in the strong combustion state. Ignition is good when this is done.

FIG. 10 shows another embodiment. In this embodiment, the hot air is spread over the entire object to be cooked X by alternately moving the flame a side of the lower flame burners 5a, 5b up and down. I made it possible. Explaining this, both lower fire burners 5
a and 5b are interlocked with the motor 20, respectively, and when one burner 5a is in a substantially horizontal state, the other burner 5b is swung up and down so as to face obliquely downward so that hot air is exposed as much as possible. It was spread over the whole of the cooked food X to eliminate burn marks.

That is, when the jetting power of the gas from the lower-flame burners 5a, 5b is weak and the lower-flame burners 5a, 5b are close to the horizontal state, the flames from the lower-flame burners 5a, 5b are When it extends to the central position of the heating chamber 1 and is inclined downward, the vicinity of the side wall of the heating chamber 1 is heated. Therefore,
By alternately moving the lower fire burners 5a and 5b up and down, hot air can be spread over the substance to be cooked.

Further, when the jetting power of gas from the lower heat burners 5a, 5b is strong and the lower heat burners 5a, 5b are inclined downward, the flames from the lower heat burners 5a, 5b are once lowered. After being ejected to the upper part, the hot air expands to the central position of the heating chamber 1 because it goes upward. In contrast, the lower heat burner 5
When a and 5b are in a state close to the horizontal state, the hot air rises quickly from the lower-flame burners 5a and 5b, so that the heating chamber 1
Near the side walls of. Therefore, by moving the burners 5a and 5b up and down alternately, the hot air can be spread over the entire object to be cooked X. Other configurations are the same as those of the embodiment shown in FIGS. 1 and 2.

In this embodiment, when one burner 5a is in a substantially horizontal state, the other burner 5b is alternately swung up and down so as to face obliquely downward. Even if 5b are swung up and down at the same time in a horizontal state and at a slanting downward direction, the hot air is almost the same as the food to be cooked X.
It can be spread over the whole area to eliminate burn marks. or,
The vertical swing may be performed between the horizontal state and the diagonally upper side.

In the embodiment shown in FIG. 11, both lower fire burners 5 are used.
a is formed along the upper side of a and 5b toward the center of the heating chamber 1, and the air flow is alternately switched between strong and weak.
As an extreme example thereof, the air flow is switched to a state where there is air flow and a state where there is no air flow. To explain this, the ducts 22 communicating with the air outlets 21 provided on the upper sides of both lower fire burners 5a and 5b are connected. A common fan 23 is connected to the duct 22, and a damper 24 is provided to distribute the air blown from the fan 23 to the left and right air outlets 21. The damper 24 is alternately rocked.

In this case, the damper 24 alternately supplies the air from the fan 23 to the lower fire burners 5a and 5b, and when there is an air flow, the air flow suppresses the hot air flowing upward. When it reaches the center and there is no air flow, there is no this and hot air spreads to both sides. By these, the hot air is spread as much as possible over the entire object to be cooked X, and the burning spots are eliminated.

Further, in the embodiment shown in FIG. 11, even if the air flow is formed not only on the upper side of both lower fire burners 5a, 5b but also on the lower side thereof, the air flow along both lower fire burners 5a, 5b is also the same. In addition, hot air can be spread to the center side and both sides of the heating chamber 1 alternately. That is, when there is an air flow, the hot air reaches the center with it, and when there is no air flow, the hot air rises from both sides and wins.
The hot air is spread to the whole of the food to be cooked X as much as possible, and the burning spots are eliminated. In these embodiments, the air passages above the burner may be provided with the current plate as shown in FIGS.

Ducts (not shown) communicating with the air outlets provided under the lower fire burners 5a and 5b, respectively.
A common fan is connected to the duct, and a damper that distributes the air blown from the fan to the left and right air outlets is provided. By alternately swinging the damper, the air flow is alternately switched between strong and weak. However, the hot air is spread all over the object to be cooked X, and the burning spots are eliminated.

In the embodiment shown in FIG. 11, the duct 22
A common fan 23 is communicated with each other, and a blower 24 distributes the blast air to the left and right air outlets 21. The air intake 2 of each lower fire burner 5a, 5b
1 and 21 are provided with fans 23 that communicate with each other, and the amount of air blown by each fan 23 is switched so as to increase or decrease left or right, or the amount of air blown by the fan 23 is switched between left and right simultaneously increased or decreased. By alternately generating strong and weak air flows, it is possible to spread the hot air to the whole of the food to be cooked X as much as possible.

In the embodiment shown in FIGS. 12 and 13, an air flow is formed toward the center of the heating chamber 1 along the upper side of both lower fire burners 5a and 5b, and the air flow is alternately switched between strong and weak. I will explain this, the two lower fire burner 5
An outlet plate 25 having a large number of air outlets 25a is provided above a and 5b, and a diaphragm plate 26 that moves along the air outlet plate 25 is provided. The diaphragm plate 26 is moved in association with a motor or the like. By alternately changing the degree of polymerization with the air outlet 25a, the air flow toward the center of the heating chamber 1 along the upper side of both lower fire burners 5a, 5b is alternately switched to the left and right. When doing so, the air outlet 25a
Is large and the air flow is strong, the hot air is suppressed upward by the air flow and reaches the center. When the air outlet 25a is small and the air flow is weak, the degree is small and the hot air spreads to both sides. As a result, the hot air is spread as much as possible over the entire object to be cooked X, and burnt spots are eliminated.

Although the diaphragm plate shown in the drawing is operated vertically, the diaphragm plate is provided with a through hole for the air outlet and is operated in the front-back direction of the heating chamber to change the area of the air outlet. It goes without saying that you may do it.

Further, the operation of unraveling the left and right air outlets 25a by the diaphragm plate 26 is performed by alternately switching the air flow from the left and right air outlets 25a between a strong state and a weak state. Can also spread the hot air to the entire object to be cooked X.

The ventilation in this case may be forced ventilation by a fan or natural ventilation.

In this embodiment, both lower fire burners 5a,
Forced toward the center of the heating chamber 1 not only on the upper side of 5b, but also on the lower side by using the means for changing the air flow toward the center of the heating chamber 1 along the lower heat burners 5a and 5b similar to the above. Even if the air flow is changed, the same effect can be exerted.

Ventilation in this case is limited to forced ventilation by a fan.

In the embodiment shown in FIG. 14, lower flame burners 5a and 5b are provided on both sides below the heating chamber 1 so that the flame openings a are directed to the center of the heating chamber 1, and the cooked material X is provided in the middle.
It is the same as the above-described embodiment in which the grill 6 for mounting the above is installed, but in this embodiment, the air flows directed to the center of the heating chamber 1 are alternated along the upper side and the lower side of both lower fire burners 5a, 5b. In the following description, the air outlets 27, 27 for forming an air flow toward the center of the heating chamber are provided along the upper lower side of the lower fire burners 5a, 5b. The air outlets 27, 27 are alternately opened and closed by a damper 28.

In this case, the opening and closing may be set so that the upper and lower openings are opposite to each other by the left and right dampers 28, or the opening and closing of the left and right dampers 28 are the same, that is, when the upper left and right are opened. You may make the bottom close together.

In these cases, the ventilation may be natural ventilation or forced ventilation by a fan.

The damper 28 may be alternately opened and closed by a motor or the like, but the damper 28 can be made of a shape memory alloy, and the shape memory alloy can be used in the heating chamber 1 when the damper 28 is closed. It opens with the atmosphere inside, and when it is open, it is cooled and closed by the flow of air.

In the above-mentioned embodiments, the rear exhaust type grill having the upper fire burner and the rear exhaust port is explained. The above-mentioned burning spots are particularly likely to occur in a rear exhaust type grill equipped with an upper fire burner, but a rear exhaust type grill not equipped with a upper fire burner, or an upper fire burner and an exhaust port having a central exhaust port. It can also occur in the central exhaust grill at the top, or even in the central exhaust grill where there is no upper burner and the exhaust is in the central upper part of the heating chamber.
Therefore, the present invention can be applied to these grills to eliminate burn spots as well.

In the embodiment shown in FIGS. 1 to 3, a horizontally extending exhaust passage 29 connecting the heating chamber 1 and the exhaust port 3 is provided behind the heating chamber 1, and the upper fire burner 4 is connected to the exhaust passage 29.
The exhaust gas flowing in the exhaust passage 29 is further burned by the upper fire burner 4 facing the exhaust passage 29 to deodorize it. In this case, the upper burner 4 facing the exhaust passage 29 may be ignited by the flame of the pilot burner 30. In this case, the pilot burner 30 is provided below the lower side wall 31 of the exhaust passage 29 as it goes obliquely upward from the rear to the front, and the flame is applied to the upper fire burner 4 through the through hole 32 provided in the lower side wall 31. To ignite. in this case,
As shown in FIGS. 1 and 3, if the through hole 32 is extruded obliquely upward and forward and a burring portion is formed at the upper end of the extruded part, a relatively high rise around the through hole 32. There is a wall. Thus, even if spilled juice or the like enters the exhaust passage 29 from the exhaust port 3, it can be prevented from leaking to the outside through the through hole 32.

In the embodiment shown in FIGS. 11 to 14, the fan 23 may be stopped at the time of ignition.

FIG. 15 and FIG. 16 show another embodiment. In this embodiment, hot air is cooked by changing the supply amount of primary air while the gas amounts of the lower fire burners 5a and 5b are constant. I tried to spread it over the entire X to eliminate the burn marks. Explaining this, when the damper 33 is connected to the motor M via a gear or the like and the damper 33 is opened to increase the supply amount of the primary air, the flame becomes sharp and extends in the direction toward the flame mouth. The hot air reaches the center of the heating chamber 1, the damper 3
When 3 is operated in the closing direction to reduce the supply amount of the primary air, the flame tends to rise and the hot air moves toward both sides of the heating chamber 1. Therefore, the damper 33 is slowly opened / closed by the motor M so that hot air can be absorbed by the cooked object X.
Can be spread throughout. In this embodiment, a blower may be used instead of the damper 33, and the air flow rate of the blower may be switched to switch the supply amount of the primary air. In addition, the cooking mode is strengthened by cooking,
It may change like weakness. This is done by increasing / decreasing the amount of gas, but in the grill whose amount of gas is increased / decreased in this way, a slight change in the primary air is dealt with in correspondence with the amount of gas.

Further, in the grill in which both burners 5a and 5b are alternately switched between the strong combustion state and the weak combustion state, it is required to switch the cooking mode.
In order to satisfy this, the emphasis mode is long in the strong combustion state and short in the weak combustion state, and the weak cooking mode in which the combustion time is short in the strong combustion state and the combustion time is long in the weak combustion state. Enabled to switch to and.

Referring to FIG. 17, the emphasis mode circuit A connected to one contact of the micro switch S1 switched by the cam plate C shown in FIG. 6 and the other of the micro switch S1 switched by the cam plate C. Via the manual switch S2 for selecting the weak cooking mode circuit B connected to the contact of the solenoid valve 1 shown in FIG.
3a, 13b coils 13a-1, 13b-1 power source W
Freely connectable to.

The cam plate C is connected to the emphasis mode circuit A side for 50 seconds and connected to the weak cooking mode circuit B side for 10 seconds, for example.

Thus, when the emphasis mode circuit A is selected by the manual switch S2, the solenoid valves 13a, 1 are selected for 50 seconds.
The solenoids 13a-1 and 13b-1 of 3b are energized to open the solenoid valves 13a and 13b to burn both burners 5a and 5b in a strong combustion state, and for the next 10 seconds, the solenoid valves 13a and 13b are burned.
The state in which the power supply to the coils 13a-1 and 13b-1 is cut off and the coil 13a-1 and 13b-1 are burned in the weak combustion state is alternately repeated. For this reason,
The combustion gas amount in both burners 5a and 5b in the one cycle becomes relatively large. On the other hand, when the weak cooking mode circuit B is selected by the manual switch S2, the coils 13a-1 and 13b-1 of the solenoid valves 13a and 13b are not energized for 50 seconds, and the solenoid valves 13a and 13b are closed so that both are closed. Burner 5a,
5b is combusted in a weak combustion state, and for the next 10 seconds, the coils 13a-1 and 13b-1 of the solenoid valves 13a and 13b are energized to combust in a strong combustion state. Therefore, the amount of combustion gas in both burners 5a and 5b during the one cycle is relatively small. The switching means may be performed by a microcomputer.

In the grill equipped with the upper heat burner 4, switching of the cooking mode, ignition of the upper heat burner 4,
Combining fire extinguishing will increase the number of cooking modes. In this way, in the grill with upper and lower fire, especially when the upper fire is a surface combustion type like a burner using a ceramic burner,
It may be difficult to ignite the upper flame burner due to the exhaust of the lower flame burner. Therefore, in FIG. 4, it is advisable to first open the on-off valve 18a to ignite the upper fire, and then open the on-off valve 18b to ignite the lower burner when the flame detection means (not shown) confirms the ignition. In this case, an ignition burner may be provided instead of using the fire transfer burner.

It is to be noted that the means for switching the both burners 5a, 5b between the strong combustion state and the weak combustion state is used together with a means for vertically swinging the flame mouth side of the both lower burners 5a, 5b, or both the lower burners 5a, 5b. A means for forming an air flow toward the center of the heating chamber 1 along the fire burners 5a, 5b and switching the air flow between strong and weak is used together, or along the upper and lower sides of both lower fire burners 5a, 5b. A means for alternately forming the air flow toward the center of the heating chamber 1 vertically can be used together.

Further, both lower fire burners 5a and 5b are used to change the amount of primary air supplied to both lower fire burners 5a and 5b.
Means for swinging the flame mouth side up and down, or means for forming an air flow toward the center of the heating chamber 1 along the lower fire burners 5a, 5b and switching the air flow between strong and weak. It is also possible to use them together, or to use a means for alternately forming upper and lower air flows directed toward the center of the heating chamber 1 along the upper and lower sides of both lower fire burners 5a and 5b.

[0056]

[Effect of the Invention] The grill having the above structure has the following effects. In the grill according to claim 1, which has the above-mentioned configuration, when the lower combustion burner is in a strong combustion state, the hot air extends to a central position of the heating chamber, and when the lower combustion burner is in a weak combustion state, the hot air is near the side wall of the heating chamber. The hot air can be spread all over the cooked object simply by switching the combustion capacity of the cooker alternately, and the hot air of the lower-flame burner that hits the cooked object can be made substantially uniform, so that the cooked food can be baked uniformly over the entire cooked object. I can.

In the grill according to the second aspect of the present invention, the hot air from the lower fire burner is spread to both side walls of the heating chamber and the central side of the heating chamber by vertically swinging the flame mouth sides of both lower fire burners. It is possible to spread the hot air from both lower fire burners to the whole of the food to be cooked.

In the grill according to the third aspect of the present invention, an air flow toward the center of the heating chamber is formed along the lower fire burners, and the air flow is switched between strong and weak so that hot air from the lower fire burners is discharged. The air flow can be guided to both side walls of the heating chamber and to the center of the heating chamber, so that the hot air from both lower-flame burners can be spread over the entire object to be cooked.

In the grill according to the fourth aspect, when an air flow from the lower heat burner toward the center of the heating chamber is formed along the upper side, hot air from the lower heat burner is suppressed by the air flow and heated. When an air flow is formed toward the center of the heating chamber toward the center of the heating chamber, but toward the center of the heating chamber, the hot air from the lower heating burner is directed toward the wall side of the heating chamber by the air flow. . Therefore, repeat this alternately
In it is possible to spread the hot air substantially the entire the food being placed on the said grill.

In the grill according to the fifth aspect, when the supply amount of the primary air to both lower-flame burners is increased, the flames from both lower-flame burners become sharp and extend toward the flame mouth, and the hot air is heated accordingly. reach to the center of the chamber, when reducing the supply amount of the primary air, the flame is hot air toward both sides of the heating chamber becomes rising slightly. Therefore, by repeating this alternately, the hot air can be spread over almost the entire object to be cooked placed on the grill.

In the grill according to the sixth aspect, the hot air is spread over the entire object to be cooked by alternately switching the combustion ability of the lower flame burner, so that the hot air of the lower flame burner which hits the object to be cooked is substantially uniform. Even in the grill that allows the cooked food to be baked uniformly over the whole, it is possible to switch the cooking mode and cook under different amounts of heat.

[Brief description of drawings]

FIG. 1 is a cutaway side view showing an embodiment of the present invention.

2 is a cutaway front view of FIG.

FIG. 3 is a plan view of a portion of FIG.

FIG. 4 is an explanatory view showing a gas supply passage.

FIG. 5 is a sectional view taken along line VV of FIG.

FIG. 6 is a side view of the cam plate.

FIG. 7 is an explanatory view showing a gas supply passage.

FIG. 8 is a diagram for explaining the operation of the three-way valve.

FIG. 9 is an explanatory view showing a gas supply passage.

FIG. 10 is a cutaway front view of another embodiment.

FIG. 11 is a cutaway front view of another embodiment.

FIG. 12 is a cutaway front view of still another embodiment.

13 is a perspective view of the main part of FIG.

FIG. 14 is a cutaway front view of still another embodiment.

FIG. 15 is a cutaway front view of still another embodiment.

16 is a cutaway plan view of FIG.

FIG. 17 is a control circuit diagram of the embodiment shown in FIG.

[Explanation of reference symbols] 1 heating chambers 5a, 5b lower heat burner 6 grill

Claims (6)

[Scope of utility model registration request] 1. A grill provided with a lower-flame burner having flame openings directed toward the center of the heating chamber on both lower sides of the heating chamber, and a grill on which an object to be cooked is placed, above the burner. A grill characterized in that the combustion capabilities of both lower-flame burners are switched alternately between a strong combustion state and a weak-combustion state. 2. A grill comprising lower heating burners, each having a flame outlet directed toward the center of the heating chamber, on both lower sides of the heating chamber, and a grill on which an object to be cooked is placed. A grill characterized in that the flame mouth sides of the lower fire burners are swung up and down. 3. A grill provided with a lower fire burner having flame openings directed toward the center of the heating chamber on both lower sides of the heating chamber, and a grill on which an object to be cooked is placed, above the burner. A grill characterized by forming an air flow toward the center of the heating chamber along the lower fire burners and switching the air flow between strong and weak. 4. A grill provided with a lower fire burner having flame openings directed toward the center of the heating chamber on both lower sides of the heating chamber, and a grill provided above the lower burning burner for placing an object to be cooked thereon. A grill characterized in that an air flow directed toward the center of the heating chamber is formed alternately up and down along the upper and lower sides of both lower fire burners. 5. A grill provided with a lower fire burner having flame openings directed toward the center of the heating chamber on both sides below the heating chamber, and a grill provided with a grill for placing an object to be cooked above it. A grill characterized by changing the amount of primary air supplied to both lower fire burners. 6. A lower-firing burner having flame openings directed toward the center of the heating chamber is provided on each of the lower sides of the heating chamber, and a grill for placing an object to be cooked is provided above the lower-firing burner. In the grill that alternately switches the combustion state of to the strong combustion state and the weak combustion state, a cooking mode in which the combustion time is long in the strong combustion state and the combustion time is short in the weak combustion state,
A grill characterized by being able to switch to a cooking mode in which the burning time in the strong burning state is short and the burning time in the weak burning state is long.