JPH0317801Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a smokeless roaster for grilled meat equipped with a fire extinguishing device, and further to a fire extinguishing system for a floor duct of the roaster.

[Problems to be solved by conventional techniques and ideas]

For the past two to three years, smokeless roasters have been installed at Yakiniku restaurants, but there have been a number of duct fires caused by these roasters. This roaster has a duct connected directly to the roaster, and this duct runs under the floor to exhaust smoke outdoors. Because the duct is directly connected to the roaster, it is easy for a fire to occur, so some districts have recently started installing automatic fire extinguishing devices under administrative guidance in some areas.

This smokeless roaster for yakiniku has a roaster attached to the table, a roaster on the top of the roaster, and a burner and oil pan hanging below the roaster. There is a gap around the top of the oil pan, and the chain is connected to a branch duct. A grease filter is installed below the oil pan.
Grease filters have a structure with gaps made of wire mesh or tanzak boards. The grease filter can be removed from the roaster for cleaning. A branch duct is connected to the roaster,
The branch duct is connected to the main duct, and a fire damper (temperature fuse) is provided at the connection point. The main duct is placed horizontally under the floor.
Many branch ducts are gathered together.

Yakiniku smoke comes from the gap around the top of the roaster.
It enters the branch duct, collects in the main duct, and is discharged outdoors by a fan.

The structure of a roaster is generally as shown above, but there are a large number of manufacturers, and some have no grease filter, no oil pan, or have a secondary air intake in the middle of the branch duct. There are certain things.

The fire occurred because the flame from the burner entered the roaster through the upper gap in the oil pan and heated the oil that had accumulated in the corner of the roaster.When the oil burned, pieces of flaming meat, etc. were released from the upper gap. Caused by falling into the roaster and igniting the grease filter.
Once a fire breaks out, the airflow inside the duct can cause the flames to spread to nearly 2 meters, but since there is generally a fire damper, the damper melts the fuse and tightens the damper. If the damper is completely tightened, the problem will subside, but if the damper has not been cleaned for months, it will not close completely because it has oil dust on it. And since the wind speed is particularly high in the gap between the dampers, the fire spreads from this area. When a branch duct catches fire, the temperature inside the duct can reach hundreds of degrees (nearly 1000 degrees Celsius). Ducts are usually made of thin aluminum pipes, so the pipes can melt and burst. Even if it does not break, the floor in contact with the duct will heat up and cause a fire.

[Means for solving problems]

The purpose of this invention is to extinguish fires in ducts for yakiniku floors, and instead of distributing a large fire extinguishing system to each roaster using piping, it is possible to install a fire extinguishing system inside each roaster. It is characterized by the installation of an emergency manual activation device, an emergency buzzer, and a signal conversion output device.

That is, the present invention attaches a roaster to the table,
In a smokeless roaster for grilled meat, a burner and an oil pan are provided below the roaster on the top surface of the roaster, and a gap on the upper outer periphery of the oil pan is connected to a branch duct via a filter installed at the bottom of the roaster body. Attach the equipment,
A heat sensor for operating this fire extinguishing system is installed below the filter in the roaster body, and a fire extinguishing agent nozzle of the fire extinguishing system is installed above the filter inside the roaster body, and this fire extinguishing system is also equipped with an emergency manual activation device. The present invention also provides a yakiniku floor pulling duct with a fire extinguishing device, characterized in that it is equipped with a signal conversion output device for gas cutoff and fan stoppage.

[Effect]

As with the case of the kitchen duct, ABC powder is most suitable for the automatic fire extinguishing device installed in the roaster of the present invention.

To extinguish a roaster fire, it is necessary to apply chemicals to the burning parts, and to completely extinguish the fire and prevent the fire from spreading, it is necessary to
It is necessary to maintain the ABC powder at a predetermined concentration (minimum 150 g/m ³ ) for a certain period of time (approximately 5 seconds).

This fire extinguishing system includes a device that detects a fire and issues an alarm, and a device that shuts off the burner when it is activated.
An interlock to stop the fan is also required.

The detector should be located behind (downwind) from the fire point. If it is upwind from the fire, it will not be detected, and if it is installed in the main duct, it will be cooled by the cold air coming from the roaster, which is not on fire, and detection will be delayed. Therefore, it is best to place it near the point between the (grease) filter of the branch duct and the fire damper, close to the filter. If the branch duct is equipped with a secondary air intake, install it upwind from this intake.

The nozzle should be positioned so that the chemical can reach the top of the roaster even if the duct has a specified wind speed (even if the device is linked to the duct fan stopping, the fan will continue to draw air for a while after stopping), and the grease A good point is upwind of the filter and close to the filter.
If it is installed downwind, the wind speed at the grease filter is very high, so it is difficult for the chemicals to enter upward from the grease filter.

〔Example〕

As shown in FIG. 1, a roaster body 2 is attached to a table 1, a roaster 3 is provided on the upper surface inside the roaster body 2, and a burner 4 and an oil pan 5 are provided below. (Grease) filter 7 provided at the bottom inside the main body 2
It is connected to branch duct 8 through. A fire extinguishing system 10 is fixedly installed between the roaster main body 2 and the roaster outer cylinder 9, and as shown in FIG. When a fire is detected, the nozzle b is opened and the extinguishing agent in the chemical storage container c is released.

In FIG. 2, d is an indicator pressure gauge, e is a flexible wire, f is a pipe, g is an alarm buzzer terminal, and h is a power cutoff terminal. The signal conversion output device is designated k.

Next, the fire extinguishing system of the present invention will be explained with reference to FIG. 3. A fire extinguishing device 10 as shown in FIG. 2 is installed between the roaster main body 2 and the roaster outer cylinder 9 for each of a large number of yakiniku tables. and each roaster body 2
The branch ducts 8 are gathered into the main exhaust duct 11. As shown in FIG. 1, the sensor a of each fire extinguisher 10 is provided below the filter 7, and the nozzle b thereof is provided above the filter 7.

Further, an emergency manual activation device 12 for activating a fire extinguishing system 10 in an emergency and a buzzer 13 for issuing an alarm in the event of a fire are installed on the outside of the roaster outer cylinder 9, respectively.

[Effect of idea]

(1) Since a fire extinguishing device is installed at each yakiniku stand, there is no variation in fire extinguishing performance from stand to stand.

(2) Regarding system construction costs, there is no piping work, so 1/
It only takes about 3. In the method of installing drug release piping, the tournament piping is very difficult.

(3) An emergency manual activation device and an emergency buzzer can be easily installed on each yakiniku table.

(4) In the event of a fire, extinguishing agent is released only on that stand, so there is no contamination or waste of extinguishing agent after the fire is extinguished.

(5) The fire extinguisher will be installed inside the yakiniku stand so it will not interfere with users.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional explanatory diagram showing the main parts of an embodiment of the grilled meat floor duct with fire extinguishing system of the present invention, Figure 2 is an explanatory diagram of the fire extinguishing system used in the above, and Figure 3 is the fire extinguishing system of the present invention. It is an explanatory diagram showing a fire extinguishing system of a duct that draws a grilled meat floor. 1...table, 2...roaster body, 4...
...Burner, 5...Oil pan, 7...Filter,
8... Branch duct, 9... Roaster outer cylinder, 10...
...Fire extinguisher, a...heat sensor, b...nozzle, k
...Signal conversion output device.

Claims (1)

[Claims for Utility Model Registration] (1) A roaster is mounted on a table, and a burner and an oil receiver are provided below the roaster on the top surface of the roaster, and the gap above the outer periphery of the oil receiver is a filter provided at the bottom inside the roaster body. In a smokeless roaster for yakiniku that is connected to a branch duct, a fire extinguishing device is attached to the roaster,
A heat sensor for operating this fire extinguishing system is installed below the filter in the roaster body, and a fire extinguishing agent nozzle of the fire extinguishing system is installed above the filter inside the roaster body, and this fire extinguishing system is also equipped with an emergency manual activation device. A yakiniku floor pulling duct with a fire extinguishing device, characterized in that it is equipped with a signal conversion output device for gas cutoff and fan stoppage. (2) The yakiniku floor duct according to paragraph 1 of the utility model registration request, in which the fire extinguishing device is housed between the roaster body and the roaster outer cylinder. (3) A practical use characterized in that the branch ducts of a large number of roasters are assembled into a main exhaust duct, and each roaster is provided with a fire extinguishing system, an emergency manual activation device, an emergency buzzer, and a signal conversion output device. A yakiniku floor pulling duct according to claim 1 or 2 of the invention registration claim.