JPH064100B2 - Fire extinguisher for kitchen - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fire extinguisher used in a kitchen.

BACKGROUND ART In a typical prior art, when a fire occurs in a combustion device installed in a kitchen, such as a range and a flyer,
A fire extinguisher is sprayed in the vicinity to extinguish the fire.

Problems to be Solved by the Invention In such a prior art, when a fire is generated in a pan for cooking, such as Chinese food, it is erroneously detected that a fire has occurred, which causes the extinguishing agent to disappear. There is a problem of being jetted.

An object of the present invention is to provide a kitchen fire extinguisher device capable of preventing a fire from being mistakenly detected during cooking.

Means for Solving the Problems The present invention is directed to a combustion device 3, 4 to which a fuel gas is supplied via a gas supply line 28 in which an opening / closing valve 27 is interposed, and a hood provided above the combustion device 3, 4. 5, a duct 6 for guiding the exhaust gas from the hood 5 to the outside, fire detectors 17 and 30 provided inside the hood 5 for detecting the temperature of the exhaust gas, and a fire detector provided inside the hood 5 for a fire Nozzle 18 for injecting the extinguishing agent based on the output from the sensors 17, 30
19, 31, 32, a container 22 filled with the extinguishing agent, a container valve 23 connected to the container 22, and a hood 5 provided with the container valve 23 and the nozzles 18, 1.
In response to the output from the fire extinguishing agent supply pipe 24 for connecting 9, 31, 32, and the fire detectors 17, 30, when a predetermined first temperature T1 or higher that may occur during cooking is detected, opening / closing When the valve 27 is closed and a predetermined second temperature T2 or higher higher than the first temperature is detected, the container valve 23 is opened to remove the extinguishing agent in the container 22 from the nozzles 18, 19, 31, 3.
2 includes a control circuit 21 that controls so as to inject from the fuel cell 2, a container 29, a container valve 23, and a heat-resistant case 29 in which the control circuit 21 is housed. The case 29 is a hood through the heat insulating member 16. 5 is attached to the outer peripheral surface or the inner peripheral surface of the fire detector 17, and the fire detectors 17, 30 and the nozzles 18, 19, 3
1, 32, the extinguishant supply pipeline 24, the container 22,
Case 29 accommodating container valve 23 and control circuit 21
Is a fire extinguisher for the kitchen, characterized in that the hood 5 attached in advance is connected to the duct 6.

Operation According to the present invention, the hood 5 has the fire detectors 17, 30.
The nozzles 18, 19, 31, 32, the extinguishing agent supply conduit 24, the case 22, in which the container 22, the container valve 23 and the control circuit 21 are housed, are attached in advance, and the hood 5 is a duct. 6 is connected. As a result, in the kitchen, the fire extinguishing device can be provided simply by mounting the hood 5 above the combustion devices 3 and 4. Therefore, there is no need for plumbing work in the kitchen, etc.
This greatly simplifies the work of attaching the hood and the fire extinguisher in the kitchen of the house.

Further, according to the present invention, the open / close valve 27 is closed when the fire detectors 17 and 30 detect a predetermined first temperature T1 or higher that may occur during cooking, whereby the combustion devices 3 and 4 are connected.
Shut off fuel to the. When the temperature detected by the fire detectors 17 and 30 is lower than the predetermined second temperature T2 which is higher than the first temperature T1, the extinguishant is not injected. Therefore, even if cooking that causes a fire in a pan, such as Chinese food, the extinguishant is not sprayed, and cooking can be performed.

When the fire detectors 17 and 30 detect the second temperature T2 or higher, the extinguishing agent is injected. Therefore, the fire can be extinguished. At this time, the on-off valve 27 is closed as described above, and fuel is not continuously supplied after the fire is extinguished.

Embodiment FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a simplified sectional view showing the entire structure thereof. Referring to these drawings, on a floor 2 of a kitchen 1 such as a kitchen, there is a range 3 which is a combustion device that uses fuel gas such as city gas.
And a flyer 4 are provided. A hood 5 for discharging exhaust gas is provided above the range 3 and the flyer 4, and a duct 6 is connected to the hood 5. The hood 5 is arranged on the ceiling 7, for example. The duct 6 is provided with a suction fan 9 via a damper 8 for opening and closing the duct 6. The damper 8 is opened, and the fan 9 is driven to forcibly discharge the exhaust gas, so that the exhaust gas is discharged to the outside of the house.

The hood 5 has a wall portion 10 having a quadrangular horizontal cross section that hangs vertically, and a top portion 11 that closes an upper portion of the wall portion 10.
It has a cylindrical connecting portion 12 which communicates with an exhaust hole 12 formed in the top portion 11 and extends upward, and a flange 13 which is fixed to an upper end portion of the connecting portion 12. The above-mentioned duct 6 is provided above the ceiling 7 of the building.
The lower end portion 14 of is connected to the flange 13. A filter 15 for removing grease in exhaust gas is provided in the hood 5.
Is installed.

On the outer peripheral surface of the wall portion 10 of the hood 5, a first unit U1 for the range 3 and the flyer 4, a second unit U2 for the hood 5, and a third unit U for the duct 6.
3 and 3 are attached via the heat insulating member 16, respectively.

A fire detector 17 for detecting a fire caused by the range 3 and the flyer 4 is provided inside the hood 5, and nozzles 18 and 19 for injecting an extinguishing agent to the range 3 and the flyer 4 are provided. Fire detector 17
Is realized by, for example, a thermistor and detects the temperature. The output from the fire detector 17 is given from a line 20 to a control circuit 21 provided in the unit U1, as shown in FIG. A fire extinguishing agent for extinguishing the fire of the range 3 and the flyer 4 is filled in a container, for example, the pressure container 22, and this extinguishing agent is used as a container valve 23.
Is supplied to the nozzles 18 and 19 through a pipe line 24 for supplying a digestive agent. The output of the control circuit 21 is 0 from the line 25.
It is given to the on-off valve 27 via the R gate 26. Range 3
The fuel gas is supplied to the flyer 4 through the gas supply line 28.
Will be supplied via. The opening / closing valve 27 is interposed in the middle of the conduit 28. The control circuit 21, the pressure container 22, and the container valve 23 are housed in a case 29 having heat resistance.

FIG. 4 is a flow chart for explaining the operation of the control circuit 21. Moving from step n1 to step n2, the control circuit 21 responds to the output from the fire detector 17 and the detected temperature T may occur during cooking in a predetermined first
It is determined whether the temperature is equal to or higher than T1.

T1 ≦ T (1) When the first expression is satisfied, the process proceeds to step n3 and the range 3
And the on-off valve 27 that supplies the fuel gas to the flyer 4 is closed. The first temperature T1 is, for example, 150 ° C.
Therefore, for example, when a fire is caused in a pan heated in the microwave oven 3 to cook Chinese food or the like, the open / close valve 27 is only shut off and the extinguishing agent is not sprayed. The range 3 can be ignited and the cooking can be continued by manually or by opening the open / close valve 27 and performing a recovery operation by another method.

When a fire occurs, the temperature T detected by the fire detector 17 becomes equal to or higher than the predetermined second temperature T2. This second
The temperature T2 is 180 ° C., for example, and is set to a value higher than the first temperature T1. When it is determined in step n4 that the temperature T detected by the fire detector 17 is equal to or higher than the second temperature T2, the control circuit 21 opens the container valve 23 in step n5. This allows pressure vessel 2
The extinguishing agent from 2 is sprayed from the nozzles 18 and 19 through the container valve 23 and the conduit 24. In this way, it becomes possible to prevent fires in the range 3 and the flyer 4 in advance. At this time, the opening / closing valve 27 is closed in step n3 described above. Therefore, since the fuel gas is not supplied to the range 3 and the flyer 4, the fuel gas does not leak, there is no danger of explosion, and it is safe. Simultaneously with the opening of the container valve 23, the fan 9 is stopped and the damper 8 is closed. The fire extinguishing agent thus injected can surely extinguish the fire in the range 3 and the flyer 4 in the kitchen.

In relation to the second unit U2 and the third unit U3,
A fire detector 30 is provided inside the hood 5 and faces the inside of the connecting portion 12. At the top 11 of the hood 5, the hood 5
A nozzle 31 for injecting a digestive agent is provided therein.
A nozzle 32 is provided in the connecting portion 12 inside the hood 5 for injecting a fire extinguishing agent into the duct 6. The second and third units U2, U3 have the same configuration as the above-mentioned first unit U1, and the output from the fire detector 30 is given to these units U2, U3 and detected by the fire detector 30. When the temperature is equal to or higher than the first temperature T1,
The signals from the lines 33 and 34 are given to the opening / closing valve 27 via the OR gate 26, and the opening / closing valve 27 is closed. When the temperature detected by the fire detector 30 becomes equal to or higher than the second temperature T2, the fire extinguishing agent is sprayed from the nozzles 31 and 32 to extinguish the fire in the hood 5 and the duct 6.

The battery 35 is housed in the case 29 of the first unit U1, and the control circuit 21 is energized. This is the second
The same applies to the third units U2 and U3.
A commercial AC power supply may be used instead of the battery 35.

In the above-described embodiment, the fire detectors 17 and 30 are configured to derive the output corresponding to the temperature, and the control circuit 2
1 outputs the first and second temperatures T1 and T2.
However, as another embodiment of the present invention, a fire detector for detecting the first temperature T1 and a fire detector for detecting the second temperature T2 are separately provided. It may be configured.

Although the units U1, U2 and U3 are attached to the outer peripheral surface of the wall portion 10 of the hood 5, they may be provided on the inner peripheral surface of the hood 5.

According to the above-described embodiment, when the hood 5 is manufactured, the units U1, U2 and U3 are attached, respectively, and
Fire detectors 17, 30 and nozzles 18, 19, 31,
32 is attached and wiring and piping are performed, and at the kitchen site, the hood 5 may be attached to the lower end portion 14 of the duct 6 by the flange 13, so that the workability at the site can be markedly improved.

Effect As described above, according to the present invention, the hood 5 includes the fire detectors 17, 30, the nozzles 18, 19, 31, 32, the extinguishant supply path pipe 24, the container 22, the container valve 23, and the control. A case 29 accommodating the circuit 21 is attached in advance,
Since the hood 5 is connected to the duct 6, it is not necessary to attach piping or the like to the hood 5 in a relatively narrow place such as a kitchen of a house, and the assembling work of the fire extinguisher and the duct are not necessary. The installation work of can be greatly simplified.

Further, according to the present invention, the container 22, the container valve 23 and the control circuit 21 are housed in the case 29, and since the case 29 has heat resistance, the container 22 and the container valve 23 housed in the case 29. In addition, it is possible to prevent oil and the like from adhering to the control circuit 21, and since the case 29 is attached to the hood 5 via the heat insulating member 16, it is possible to prevent heat from being transferred from the hood 5 which becomes relatively hot. It can be surely shut off, and the occurrence of a failure due to heat can be prevented.

Furthermore, according to the present invention, for example, when cooking such as causing a fire, the fire extinguishing agent is not accidentally sprayed,
When a fire occurs, the fuel to the combustion equipment is shut off, so there is no danger of explosion and it is safe.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a simplified sectional view showing the overall configuration of the embodiment, FIG. 3 is a system diagram of piping and wiring of the embodiment, and FIG. The figure shows the control circuit 2
3 is a flowchart for explaining the operation of No. 1. 1 ... Kitchen, 3 ... Range, 4 ... Flyer, 5 ... Hood, 6
… Ducts, 17, 30… Fire detectors, 18, 19, 3
1, 32 ... Nozzle, 21 ... Control circuit, 22 ... Pressure vessel,
23 ... Container valve, 26 ... OR gate, 28 ... Pipe line, 27 ...
Open / close valve, U1 ... 1st unit, U2 ... 2nd unit, U
3rd unit

Continuation of front page (56) References JP-A-60-14869 (JP, A) JP-A-60-203274 (JP, A)

Claims (1)

[Claims] 1. A gas supply line 28 in which an opening / closing valve 27 is interposed.
Through which the fuel gas is supplied, a hood 5 provided above the combustion devices 3, 4, a duct 6 for guiding the exhaust gas from the hood 5 to the outside, and a hood 5 provided inside the hood 5. A fire sensor 17, 30 for detecting the temperature of the exhaust gas, and a nozzle 18, provided inside the hood 5, for injecting a fire extinguishing agent on the basis of the output from the fire sensor 17, 30.
19, 31, 32, a container 22 filled with the fire extinguishing agent, a container valve 23 connected to the container 22, and a hood 5 provided with the container valve 23 and the nozzles 18, 1.
In response to the output from the fire extinguishing agent supply pipe 24 for connecting 9, 31, 32, and the fire detectors 17, 30, when a predetermined first temperature T1 or higher that may occur during cooking is detected, opening / closing When the valve 27 is closed and a predetermined second temperature T2 or higher higher than the first temperature is detected, the container valve 23 is opened to remove the extinguishing agent in the container 22 from the nozzles 18, 19, 31, 3.
2 includes a control circuit 21 that controls so as to inject from the fuel cell 2, a container 29, a container valve 23, and a heat-resistant case 29 in which the control circuit 21 is housed. The case 29 is a hood through the heat insulating member 16. 5 is attached to the outer peripheral surface or the inner peripheral surface of the fire detector 17, and the fire detectors 17, 30 and the nozzles 18, 19, 3
1, 32, the extinguishant supply pipeline 24, the container 22,
Case 29 accommodating container valve 23 and control circuit 21
A fire extinguisher for a kitchen, characterized in that the hood 5, which is attached in advance, is connected to a duct 6.