JP2000130762A - Gas grill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent overflow of flame when a substance to be cooked in a grill chamber catches fire. SOLUTION: A combustion exhaust temperature higher than a given temperature is detected by the temperature-sensitive parts of a plurality of temperature sensors 6 arranged along the direction of the long side of the section of the flow passage of a flue 60 in the vicinity of a communication port in the flue 60. When it is decided by a controller 9 that a flue flame detecting part 9c that flame is present, a flue opening and closing part 9d is energized to a solenoid 7 and the flue 60 is shut off by a shutter 8. Further, an opening valve holding part 9b stops energization to a magnet type safety valve 24 and stops combustion.

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 heating an object to be cooked such as fish in a grill storage.

[0002]

2. Description of the Related Art Conventionally, a gas table stove, which is a heating cooker, is of a type having a grill capable of heating and cooking an object to be cooked such as a fish. In such a grill, heating is started after a certain amount of water has been put into a saucer in advance during cooking, and the fats and oils coming out of the object to be cooked such as fish baked on a grill, that is, the baked oil, is placed on the surface of the water. To prevent the firing of grilled oil. However, if you forget to pour water into the saucer, you may ignite the grilled oil and ignite.If you forget to turn off the grill, the cooked material, such as a dried greasy material with a high oil content, may ignite itself. is there. This is unlikely in normal use, but if it ignites, the flame inside the grill will extend to the flue, and eventually it may spill out of the body through the exhaust vent and cause a fire. is there.

On the other hand, in order to prevent such overflow of the flame, a frame trap provided with a large number of ventilation holes is disposed in the flue so as to prevent the flame from overflowing out of the body when the object to be ignited is ignited. The technology is disclosed in Japanese Patent Application Laid-Open No. 9-72546.

In this flame trap, when the combustion exhaust gas is discharged from the exhaust port to the outside of the body, the flame trap vents the heat of the combustion exhaust gas to prevent the propagation of the flame, and extinguishes the flame to extinguish the flame. To prevent.

[0005]

However, in such a frame trap, it is necessary to reduce the size of the ventilation holes in order to ensure the fire-extinguishing effect. Then, there is a problem that the exhaust gas becomes exhaust resistance and the combustion exhaust gas cannot be discharged smoothly. Then, the gas grill of this invention solves the said subject, and an object is to prevent a flame from overflowing from an exhaust port, without clogging an exhaust flow path by oil, dust, etc.

[0006]

According to a first aspect of the present invention, there is provided a gas grill, wherein the grill is heated by a gas burner to cook the food, and the grill is connected to the grill through a communication port. In a gas grill provided with a flue for guiding combustion exhaust gas generated in a grill chamber to an exhaust port, an opening / closing device provided to be able to open and close the exhaust port or the flue, and a flame for judging the presence or absence of a flame in the flue The gist of the invention is to provide a detecting means and a driving means for closing the opening / closing device when the flame detecting means determines that there is a flame.

According to a second aspect of the present invention, there is provided a gas grill according to the first aspect of the present invention, wherein the flame detecting means determines that there is a flame when detecting a combustion exhaust temperature higher than a predetermined temperature. The gist of the present invention is that a temperature sensor is provided, and a temperature sensing part of the temperature sensor is provided near a communication port in the flue.

According to a third aspect of the present invention, there is provided a gas grill according to the second aspect of the present invention, wherein the temperature sensor of the temperature sensor is arranged to extend in a long side direction of a cross section of the flow path of the flue. It is the gist that a plurality of them are arranged along.

According to a fourth aspect of the present invention, there is provided a gas grill according to the first aspect of the present invention, wherein the flame detecting means determines that there is a flame when the flame detecting means detects light of a predetermined level or more. The gist of the present invention is that a sensor is provided and a detection area of the optical sensor is set near a communication port in the flue.

According to a fifth aspect of the present invention, there is provided a gas grill according to the fourth aspect of the present invention, wherein the optical sensor is provided on a short side of a flow path cross section of the flue. The gist is that the light receiving direction is substantially parallel to the long side of the cross section of the flow path.

In the gas grill according to the first aspect of the present invention having the above structure, the flame detecting means determines the presence or absence of a flame in the flue, and when it is determined that there is a flame, the driving means is provided at the exhaust port or the flue. Closing switchgear. Therefore, in the event that a fire occurs in the grill storage, the exhaust port or the flue is closed and the flame does not overflow outside the body, so that safety is improved. In addition, in the case of normal heating cooking without a flame, the exhaust gas or the flue is left open, so that the combustion exhaust gas can be smoothly discharged without clogging the exhaust flow channel by oil, dust and the like.

[0012] The present invention having the above-mentioned structure has a second aspect.
The gas grill described above determines that there is a flame when the temperature sensing part of the temperature sensor provided near the communication port in the flue detects a combustion exhaust temperature that is equal to or higher than a predetermined temperature, and the driving means opens and closes the exhaust port or the flue. Close the device. Therefore, in the unlikely event that a fire occurs in the grill storage and the combustion exhaust temperature exceeds a predetermined temperature,
The flame does not overflow outside the body because the exhaust vent or flue is closed. Further, the temperature sensing portion of the temperature sensor is disposed near the communication port in the flue, thereby detecting a flame at an initial stage when the communication port starts to overflow. Further, since the temperature sensor is arranged in the flue, the difference between the normal detection temperature and the ignition detection temperature is large compared to the case where the temperature sensor is arranged in the grill storage, so that malfunction is unlikely to occur. In addition to preventing the flame from overflowing outside, even when the combustion exhaust gas is overheated, the safety is improved by closing the exhaust flow passage.

Further, the present invention has the above-mentioned structure.
The gas grill described is a case where a plurality of temperature sensors are arranged along a long side direction of a flow path cross section of a flue and a flame detection area is widened, so that a flame flows into an exhaust port or a part of a flue. Also detect the flame without leakage.

Further, the present invention has the above-mentioned structure.
In the gas grill described, when the flame flows into the flue, the light sensor detects light of a predetermined level or more and determines that there is a flame. That is, the light sensor detects the flame with good responsiveness, and the light sensor is disposed near the communication port in the flue, so that the flame is detected at an initial stage when the communication port starts to overflow.

Further, according to the present invention having the above structure,
In the gas grill described, an optical sensor is provided on the short side of the flow path cross section of the flue, and the light receiving direction is directed along the long side direction of the flow path cross section, so that the flow path is monitored over a wide range That is, even if the flame flows into a part of the flue, the flame is detected without fail.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, a preferred embodiment of the grill of the present invention will be described below. FIG. 8 shows an external view of a rear exhaust type table stove. Table stove,
Two cooking stove burners 4a and 4b are provided on the top plate 3, and a cooking pot (not shown) is placed on 5a and 5b as provided around them, and operation buttons provided on the front surface of the table stove. Pressing 21a, 21b ignites the respective stove burners 4a, 4b, and the cooking pot on 5 is heated as it is.

Further, a grill 1 for grilling fish and the like is provided at the center of the body between the stove burners 4a and 4b, and the operation button 21c is pressed to ignite and heat cooking is performed. As shown in FIGS. 1 to 3, the grill 1 includes a grill storage 10 that stores and heats an object F to be cooked, and heats and cooks fish and the like in the grill storage 10. Inside the grill storage 10, a surface-burning type grill burner 40 for heating the food F by burning fuel gas to the left and right in the upper stage, a grill 20 for placing the food F in the middle, and a grill 20 in the lower stage. A receiving tray 30 is provided, which can be slid out toward the user while being placed on the tray.

Further, on the front of the grill storage 10, a tray 3 is provided.
The handle 16 is integrally fixed with the handle 0, and a handle 16 for pulling the tray 30 forward is provided with an opening / closing door 18 which opens and closes when the tray 30 is pulled out. The opening / closing door 18 is provided with a glass viewing window 18a. Can be When the handle 16 is pulled out to the front, the tray 30 fixed to the handle 16 is moved to the grill storage 10.
By sliding the bottom surface, the grill 20 placed on the tray 30 is simultaneously pulled out. In addition, a gap 11 through which external air can enter is provided on the bottom surface of the grill storage 10.

The grill burners 40 are provided on the upper right and left side surfaces of the grill storage 10, and the exhaust gas from the grill burner 40 is stored in the grill storage 10 to heat the object F to be cooked. The grill burner 40 has a combustion surface in which a number of small flame ports are provided on a flat plate made of porous ceramics.
In the next-pneumatic grill burner 40, the combustion surface is installed slightly inclined upward with respect to the vertical surface. Further, an ignition electrode (not shown) for igniting the fuel gas and a thermocouple 26 for generating a thermoelectromotive force by combustion heat are provided so as to face the flame opening of the grill burner 40.

The gas supply path to the grill burner 40 includes:
There is provided a magnet type safety valve 24 which is opened by the pressing force of the ignition operation and which can be closed when the pressing operation force is released. The magnet type safety valve 24 includes a holding coil 24a to which electric power is supplied from the controller 9 described later, an iron core (not shown) that generates an electromagnetic force when the holding coil 24a is energized, and a magnetic core that is attracted to the iron core. A suction piece (not shown) for holding the valve element (not shown) open and a spring (not shown) for urging the valve element in the valve closing direction are provided. Downstream of the magnet type safety valve 24 is provided an instrument plug 25 that is mechanically opened by being pushed during an ignition operation and closed during a fire extinguishing operation.

At the back of the grill 10, there is provided a flue 60 which is juxtaposed via a partition 71, and a communication port 7 which is opened to the partition 71 and communicates the grill 10 and the flue 60.
0 is provided. The communication port 70 is provided such that the upper end of the opening is slightly lower than the surface of the grill 20 where the object F is placed. In the flue 60, as shown in FIG. 4, a temperature sensor 6 for detecting the exhaust gas temperature near the communication port 70 is disposed near the communication port 70 in the flue 60. The temperature sensing part is arranged near the communication port 70 and slightly above the upper end of the communication port 70, and a plurality of temperature sensors 6 are arranged along the long side direction of the horizontal cross section of the flow channel. A shutter 8 for opening and closing the flue 60 is provided downstream of the temperature sensor 6, and a solenoid 7 that closes the shutter 8 when energized by the controller 9 is provided outside the flue 60 (FIG. 1).

The controller 9 also includes a flame detector 9a for determining whether or not a combustion state is present based on whether or not the thermoelectromotive force of the thermocouple 26 provided on the grill burner 40 is equal to or higher than a predetermined level.
The flue flame detector 9c determines whether there is a flame in the flue 60 depending on whether the temperature detected by the temperature sensor 6 is equal to or higher than a predetermined temperature, and closes the shutter 8 by energizing the solenoid 7 when it is determined that there is a flame. The flue gas opening / closing unit 9d and the dry cell power are supplied to open and hold the gas flow path and the flame detecting unit 9a determines that the combustion state is not in a combustion state, or the flue flame detecting unit 9c determines that the flue 60 has a flame. A valve opening holding portion 9b that sometimes closes the gas flow path is provided.

The controller 9 is connected to a dry cell power supply (not shown), and a flue / flame detector 9a of the controller 9 is provided.
Is connected to the flue temperature sensor 6, the flue opening / closing section 9c is connected to the solenoid 7 closing the shutter 8, the valve holding section 9b is connected to the magnet type safety valve 24, and the flame detecting section 9d is connected to the thermocouple 26.

Next, the operation of the grill 1 will be described. In this grill, when the ignition operation is performed, the grill storage 10
The fire is started over the entire grill burner 40 inside and the combustion is started. Within a predetermined time from the start of ignition, the valve-opening holding unit 9b of the controller 9 forcibly supplies battery power to the holding coil 24a, and thereafter, if the thermoelectromotive force of the thermocouple 26 is equal to or higher than a predetermined level, Then, the supply of battery power from the valve-opening holding portion 9b to the holding coil 24a is continued, and the combustion is continued.

The high temperature combustion exhaust gas accumulates in the upper portion of the heating chamber 10 and overflows into the communication port 70, and then rises in the exhaust chamber 60 by a draft effect. The object to be cooked F placed on the mounting surface of the grill 20 is heated to every corner by the combustion heat wrapped in the convection of the high-temperature combustion exhaust gas filling the upper portion of the heating chamber 10 and is cooked well. . Moreover, the combustion exhaust gas in the heating chamber 10 is convected downward from above while reducing the heating of the grilling oil accumulated in the pan 30 below the heating chamber 10, and the convection heat causes the food F on the grill 20 to be convected. By heating the cooking oil, the temperature of the grilling oil can be lowered to the ignition point or lower without impairing the heating cooking performance, and the ignition of the grilling oil due to overheating can be prevented without filling the saucer 30 with water.

The flame detecting section 9d of the controller 9
However, when it is determined that the thermoelectromotive force of the thermocouple 26 is equal to or lower than the predetermined level, the valve-opening holding unit 9b cuts off the power supply to the magnet-type safety valve 24.

Further, if the object to be cooked F is ignited by forgetting to turn off the grill burner 40 and the flame in the grill storage 10 spreads into the flue 60, the temperature detected by the temperature sensor 6 becomes higher than a predetermined temperature, and The flue flame detecting section 9a determines that "flame exists". When it is determined that "flame exists", the flue opening / closing section 9c of the controller 9 energizes the solenoid 7, rotates the shutter 8 to close the flue 60 ((d) in FIG. 7), and keeps the valve open. The part 9b closes the magnetic safety valve 24 to stop the combustion.

Then, the flame in the grill storage 10 extinguishes,
When the temperature detected by the temperature sensor 6 falls below a predetermined temperature, the flue opening / closing section 9c stops energizing the solenoid 7,
The shutter 8 released from the pressing force is opened again by the spring 2 ((c) in FIG. 7).

Therefore, in the event that the temperature of the exhaust gas becomes higher than the predetermined temperature due to the ignition in the grill chamber, the flue 60 is closed and the combustion is stopped, so that the flame does not overflow the body. In addition, since the temperature sensing part of the temperature sensor 6 is disposed near the communication port 70 in the flue 60,
The flame is detected at the early stage when it begins to overflow. Further, since the temperature sensor 6 is arranged in the flue 60, the difference between the normal detection temperature and the ignition detection temperature is large compared to the case where the temperature sensor 6 is arranged in the grill storage 1, so that the temperature sensor 6 is erroneous. It is hard to operate.
In addition to preventing the flame from overflowing outside by the temperature sensor 6, even when the non-flame combustion exhaust gas itself is overheated, the flue 60 is closed and the combustion is stopped, so that the safety is improved. In addition, the temperature sensor 6
Are arranged along the long side direction of the flow path cross section of the flue 60, so that the flame detection area is widened, and even when the flame flows into a part of the flue 60, the flame is detected without fail. .

As described above, according to the gas grill of the present embodiment, if the grill burner 40 is forgotten to be turned off, for example, and the fire is ignited in the grill chamber, the flue 60 is closed to prevent the flame from overflowing outside the body. I do. Therefore, the safety is extremely high. In the case of normal heating cooking, the flue 6
Since the openings 0 are largely open as they are, the combustion exhaust gas can be smoothly discharged without clogging of the exhaust passage due to oil or dust. Therefore, since a small hole or mesh such as a frame trap is not provided, the flue 60 is not clogged with oil, dust, or the like, and the durability is improved as compared with the case where a frame trap is provided.

Next, a second embodiment will be described. In the second embodiment, as shown in FIG. 5, instead of the temperature sensor 6 for detecting the presence or absence of a flame in the flue 60, an optical sensor 6b is used.
Is used. The optical sensor 6b is provided on the side surface on the short side of the flow path cross section of the flue 60 and directs the light receiving direction substantially parallel along the long side direction of the flow path horizontal cross section. It is arranged so as to be closer to 70 and slightly above the upper end of the communication port 70. Further, the light receiving surface of the optical sensor 6b is disposed at a position recessed from the inner surface so as not to be contaminated by the combustion exhaust gas. When the flame is ignited in the grill 10 and the flame flows into the flue 60, the optical sensor 6b detects light of a predetermined level or more due to the flame, and the flue flame detector 9c of the controller 9 determines that there is a flame. Then, the valve opening holding portion 9b of the controller 9 closes the magnet type safety valve 24, and the flue opening / closing portion 9d energizes the solenoid 7 to close the shutter 8 provided in the flue 60. In this case, the optical sensor 6b is disposed in the vicinity of the communication port 70 in the flue 60, and detects the flame at an initial stage when the communication port 70 starts to overflow. Further, when the light sensor 6b is used as described above, even when a part of the flame flows into the flue 60, the flame can be detected without fail because the flame detection area of the light sensor 6b is wide. Furthermore, since the light sensor 6b provided on the short side of the flow path cross section of the flue 60 is directed in the light receiving direction along the long side direction of the flow path cross section, the flow path is monitored over a wide range. That is, even when the flame flows into a part of the flue, the flame can be detected without fail.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and it is needless to say that the present invention can be implemented in various modes without departing from the spirit of the present invention. It is. For example, the shutter 8 may be manually opened after the combustion in the grill storage 10 is closed due to a fire and the shutter 8 is closed, and the magnetic safety valve 24 is closed to stop combustion. Further, the shutter 8 may be provided in either the flue 60 or the exhaust port 50. Further, as shown in FIG. 6, the flue 70 may be opened and closed by moving the shutter 8a in the sliding direction by the solenoid 7.

[0033]

As described in detail above, claim 1 of the present invention
According to the described gas grill, in the unlikely event that a fire occurs in the grill storage, the flue is closed to prevent the flame from overflowing outside.
High safety. In addition, the flue has an excellent effect that the exhaust gas can be smoothly discharged without clogging of the exhaust passage due to oil or dust.

Further, according to the gas grill of the second aspect of the present invention, the temperature difference due to the presence or absence of the flame is large, so that malfunction is unlikely and reliability is improved. Further, since the flame is detected at the initial stage when the communication port starts to overflow, the safety is improved. In addition, not only the flame is prevented from overflowing from the outside, but also when the combustion exhaust gas is overheated, the safety is further improved by closing the exhaust flow passage.

Further, according to the gas grill of the third aspect of the present invention, since a plurality of temperature sensors are provided and the flame detection area is widened, it is possible to detect the flame without leakage, thereby improving safety.

According to the gas grill of the fourth aspect of the present invention, the flame can be detected with good responsiveness by the optical sensor, and the flame can be detected before the flame spreads to the flue, so that the safety is improved.

According to the gas grill of the fifth aspect of the present invention, even if a flame enters a part of the flue, the flame can be detected without overlooking it, so that the safety is improved. .

[Brief description of the drawings]

FIG. 1 is a schematic view of a gas grill according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of the gas grill as the first embodiment (AA cross section).

FIG. 3 is a schematic configuration diagram of a gas grill as the first embodiment (a front sectional view).

FIG. 4 is a schematic view of a flue in which a plurality of temperature sensors 6 are arranged.

FIG. 5 is a schematic view of a flue in which an optical sensor 6b is incorporated in place of the temperature sensor 6.

FIG. 6 is an operation explanatory view of a (slide opening / closing type) shutter 8;

FIG. 7 is an explanatory view of the operation of a (rotating opening / closing type) shutter 8;

FIG. 8 is an external view of a gas grill.

[Explanation of symbols]

 Temperature sensor 6 Solenoid 7 Shutter 8 Controller 9 Grill storage 10 Grill net 20 Magnet type safety valve 24 Receiving tray 30 Grill burner 40 Exhaust port 50 Flue 60 Communication port 70 Partition wall 71

Claims (5)

[Claims] 1. A gas grill, comprising: a grill storage for heating and cooking food by a gas burner; and a flue connected to the grill storage through a communication port and guiding combustion exhaust generated in the grill storage to an exhaust port. An opening / closing device provided in the exhaust port or the flue so as to be openable and closable, flame detecting means for judging the presence or absence of a flame in the flue, and the switching device when the flame detecting means determines that there is a flame. A gas grill comprising a closing drive means. 2. The flame detecting means includes a temperature sensor for judging that there is a flame when a combustion exhaust gas temperature equal to or higher than a predetermined temperature is detected, and a temperature sensing part of the temperature sensor is provided near a communication port in the flue. The gas grill according to claim 1, wherein: 3. The gas grill according to claim 2, wherein a plurality of temperature sensing portions of the temperature sensor are arranged along a long side direction of a cross section of the flow path of the flue. 4. The flame detecting means includes an optical sensor for judging that there is a flame when detecting light of a predetermined level or more,
2. The gas grill according to claim 1, wherein a detection area of the optical sensor is located near a communication port in the flue. 5. The optical sensor according to claim 1, wherein the light sensor is provided on a short side surface of the flow path cross section of the flue, and its light receiving direction is substantially parallel to a long side of the flow path cross section. 4. The gas grill according to 4.