JPH033339Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fire extinguishing device for a cooking range that detects a fire in a cooking range and extinguishes it manually or automatically.

Conventionally, in restaurants, hotel kitchens, etc., a range hood is installed above a cooking range, and the range hood collects oily smoke from the range, which is then exhausted through a duct using a strong exhaust fan.

By the way, since there is oil from cooking inside the range hood and ducts, it is difficult to extinguish the fire in the event of a fire. Therefore, a fire extinguishing nozzle is installed in the range hood, and the fire can be extinguished manually or automatically using sensor output. A fire extinguishing device for a range that sprays water or a fire extinguishing agent from a fire extinguishing nozzle has been considered.

However, if the oil in the cooking pot catches fire, the flames will spread to the surrounding area, and even if water or extinguishing agent is sprayed from the extinguishing nozzle toward the range, the flames will spread to the surrounding area before the entire house is extinguished. There was a risk of the fire spreading and causing burns to nearby people.

The present invention was developed in view of these problems.In the event of a fire, a water film is formed around the range hood installed above the range without any gaps, thereby suppressing the spread of flames to the surrounding area and allowing the range to be safely heated. An object of the present invention is to provide a fire extinguishing device for a range that can extinguish a fire.

In order to achieve this purpose, the present invention installs a plurality of drench layer nozzles that form a water film toward the lower side of the outside of the range hood, and each drench nozzle is connected to the intersection of the water film with the adjacent nozzle. It is placed above the bottom of the range hood.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

First, to explain the configuration, 1 is a microwave stand,
A cooking range 2 is placed on top of the range 1, and a gas cutoff valve 3 is installed inside the range 1.
Gas is supplied via.

A range hood 4 that opens downward is installed above the range 2, and an exhaust duct 5 is pulled out from the center of the top of the range hood 4.
A fire damper 6 for closing the duct in the event of a fire and a fan 7 for forced exhaust are provided in the middle of the duct.

A pair of dampers 9 that can be opened and closed are provided inside the range hood 4, and the dampers 9 can be moved between the open position shown in the figure and the closed position shown in the receiving seat 10 indicated by 9' by a damper drive device 8 provided at the top of the range hood 4. driven into position. A pair of grease filters 11 are installed in a substantially V-shape inside the damper 9, and the range 2
Oil and soot are removed by passing smoke and steam from the oil filter 11 through a grease filter 11.

A temperature sensor 12 for detecting a range fire is installed inside the grease filter 11, and the output of the temperature sensor 12 is given to a control unit that will be explained later to monitor the fire based on the detected temperature.

On the other hand, the right side inside the range hood 4, that is, the damper 9
A fire extinguishing nozzle 13 for discharging water or a fire extinguishing agent toward the range 2 is installed on the inner wall of the hood, which is the lower side, and a fire extinguishing nozzle 13 is installed on the inner wall of the range hood 4, which is the inside of the damper 9. Filter 11
A plurality of cleaning/cooling nozzles 14 are installed that spout cleaning water for cleaning the range hood 4, and jetting cooling water (the same cleaning water) for cooling the range hood 4 in the event of a fire.

Furthermore, a drench jet nozzle 15 for forming a water film around the range hood 4 in the event of a fire is installed on the outside of the range hood 4 with the spray direction directed downward along the side surface of the range hood 4. As for the installation position of this drench yarn nozzle 15, as shown in FIG. The drench nozzle 15 is arranged such that each of the intersecting positions 16 with the water film of the drench nozzle 15 is located above the bottom side 4a of the range hood 4 by a predetermined distance l.

FIG. 3 is an explanatory diagram showing a system system of a fire extinguishing device intended for the range fire extinguishing equipment shown in FIG.

In FIG. 3, 18 is a control unit, which includes a fire damper 6 for the exhaust duct, a strong exhaust fan 7, and
A temperature sensor 12 for detecting a fire, a damper drive device 8 for driving the damper 9 to open and close, and a gas cutoff valve 3 provided on the cooker stand are each connected to a signal line, and the temperature detected by the temperature sensor 12 is determined in advance. When the temperature of the fire is reached, a control signal is output to automatically eject water or extinguishing agent from the extinguishing nozzle 13, the drencher nozzle 15, and the cleaning/cooling nozzle 14. The fire extinguishing/cleaning unit 20 is provided with a storage tank for water and a fire extinguishing agent, and a fire pump that supplies water or a fire extinguishing agent under pressure. Solenoid valve 21, 22, 2
Water or fire extinguishing agent can be supplied via 3.

Next, the operation of the above embodiment will be explained.

If oil or the like in a pot placed on the microwave oven 2 ignites and a microwave fire occurs, the extinguishment will be controlled automatically based on the temperature detected by the temperature sensor 12 or by manual operation of the operating switch provided in the control unit 18. .

This fire extinguishing control closes the gas cutoff valve 3 in response to a control signal from the control unit 18 to stop the gas supply to the range 2, stops the fan 7 provided in the exhaust duct 5, and closes the waterproof damper 6. Furthermore, the damper 9 is closed by the damper driving device 8.

Then, the control unit 18 extinguishes the fire.
A fire extinguishing control signal is sent to the cleaning unit 20, and the solenoid valves 21 and 2 are activated at the same time as the fire extinguishing pump (not shown) is started.
2 and 23 are each opened, and the solenoid valve 23
When the solenoid valve 21 is opened, water or extinguishing agent is sprayed from the fire extinguishing nozzle 13 toward the range 2, and when the solenoid valve 21 is opened, water is sprayed into the range hood 4 from the cleaning/cooling nozzle 14 installed inside the range hood 4. The range hood heated by the flame is cooled to prevent the fire from spreading to the exhaust duct 5, and the solenoid valve 22 is opened to inject water from the drencher nozzle 15 installed around the outside of the range hood 4, thereby draining the range hood. The range hood 4 is sprayed with water from the tea nozzle 15.
forms a water film around it.

Formation of a water film due to water jetting from the drench tank nozzle 15 occurs when the intersection position 16 of the water films of adjacent drench tank nozzles 15 is above the bottom side 4a of the range hood 4, as shown in FIG. Therefore, the water film created by the plurality of drenching nozzles 15 is formed seamlessly surrounding the range hood 4, and the water film wraps the flame that flares up from the range 2 side, preventing the fire from spreading to the outside and preventing the fire from spreading near the range. It is possible to reliably prevent people in the room from receiving burns due to exposure to the flames, and to reliably extinguish a stove fire in a state where it is covered with a water film formed by a drencher nozzle 15.

As explained above, according to the present invention, the range hood installed above the cooking range is equipped with a fire extinguishing nozzle for extinguishing the range, and the nozzle automatically sprays water or extinguishes the fire in response to manual operation or sensor output. In a range fire extinguishing system that extinguishes a fire by spouting a chemical agent, a plurality of drench ear nozzles that surround the outside of the range hood and form a water film surrounding the lower side of the range are installed. Each is arranged so that the intersection point with the adjacent water film is above the bottom of the range hood, so even if a fire breaks out in the range, a water film will be formed around the range hood without any gaps. This fire extinguisher is installed in the range hood to ensure that flames do not spread around the hood and cause burns to people near the range. By spouting water or extinguishing agent toward the range from the nozzle, range fires can be extinguished reliably and safely.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram showing the state of water film formation around the range hood in the embodiment of Fig. 1, and Fig. 3 is the equipment shown in Fig. 1. FIG. 2 is a system explanatory diagram of the present invention having a configuration. 1: Microwave stand, 2: Range, 3: Gas cutoff valve,
4: Range hood, 5: Exhaust duct, 6: Fire damper, 7: Fan, 8: Damper drive device, 9: Damper, 10: Receiver, 11: Grease filter,
12: Temperature sensor, 13: Fire extinguishing nozzle, 14: Cleaning/cooling nozzle, 15: Drencher nozzle, 1
8: Control unit, 20: Fire extinguishing/cleaning unit, 21, 22, 23: Solenoid valve.

Claims (1)

[Claims for Utility Model Registration] Comprising a cooking range, a range hood installed above the range, and a fire extinguishing nozzle installed in the range hood to extinguish the cooking range, the system can be operated manually or by a sensor. In a fire extinguishing device for a range that automatically spouts water or extinguishing agent from the fire extinguishing nozzle according to the output to extinguish the fire, a water film is formed in a surrounding state toward the lower side of the range at a position surrounding the outside of the range hood. A fire extinguisher for a microwave oven, characterized in that a plurality of drench yarn nozzles are provided, each of the drench yarn nozzles being arranged such that the position where the adjacent nozzle intersects with the water film is above the bottom of the range hood. Device.