JP2639789B2 - Automatic fire extinguisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire extinguishing system for a duct, a hood, a range, and a fryer which is systematically installed in a kitchen or the like.

[0002]

2. Description of the Related Art A conventional automatic fire extinguishing apparatus of this type will be described with reference to FIG. 6 to FIG. FIG.
7 is a schematic view of the entire apparatus, FIG. 7 is a cross-sectional view of the fire detection sensor part of FIG. 6, and FIG. 8 is a right side view of the fire detection sensor of FIG. In the figure, 1 is a cooking table, 2 is a range, 3 is a hood, and 4 is a duct that opens into the hood 3 and is arranged above the ceiling. Reference numeral 5 denotes a grease filter detachably mounted inside the hood 3, reference numeral 6 denotes a fire detection sensor provided in the duct 4, and reference numeral 7 denotes an adapter for holding the fire detection sensor 6, which is inserted into the hole 4a of the duct 4. It is attached to the duct 4 by screws 8 from outside. Reference numeral 9 denotes a sensor wire of the fire detection sensor 6, which is wired inside the adapter 7 and above the ceiling. Reference numeral 10 denotes a fire extinguishing nozzle provided in the duct 4, reference numeral 11 denotes a pipe of the fire extinguishing nozzle 10, and reference numeral 12 denotes an inspection port behind the ceiling.

In the case of such a duct, since the fire detection sensor 6 and the fire extinguishing nozzle 10 are naturally in the duct 4 and are contaminated by oil mist or the like, they must be cleaned periodically.

[0004]

As described above, in the conventional automatic fire extinguishing apparatus, when performing regular maintenance, particularly when cleaning the fire detection sensor 6, the user enters the ceiling from the inspection opening 12, removes the screw 8 and removes the adapter 7 from the ceiling. The fire detection sensor 6 is removed from the duct 4 to clean the fire detection sensor 6. Therefore, cleaning (replacement) of the fire detection sensor 6 must be performed in a narrow space above and below the ceiling, and the workability is extremely poor, including the difficulty of entering and exiting the inspection port 12 and moving above and below the ceiling. There was a point.

The invention of claim 1 has been made to solve such a problem. By removing the filter in the hood, the fire detection sensor can be attached and detached from under the hood, and the cleaning and replacement of the fire detection sensor is easy. The purpose is to obtain an automatic fire extinguishing device that can be operated in a short time.

It is another object of the present invention to provide an automatic fire extinguishing apparatus in which a fire extinguishing nozzle can be attached and detached from under a hood by removing a filter, and the fire extinguishing nozzle can be easily cleaned and replaced.

[0007]

An automatic fire extinguisher according to the first aspect of the present invention is provided with a fire detecting sensor and a fire extinguishing nozzle provided in a duct provided in the hood or in a filter inside the hood. A joint box in which external wiring is introduced is disposed inside the filter, and a support member that is located from the inside of the duct to the inside of the filter or that is located in the filter and supports the fire detection sensor is provided in the joint box. It is detachably mounted, and the sensor wire of the fire detection sensor is arranged along the support member and connected to the external wiring in the joint box.

The automatic fire extinguisher according to the second aspect of the present invention comprises an external pipe introduced into the filter and a pipe positioned from inside the duct to inside the hood or positioned inside the filter and supporting the fire extinguishing nozzle. It is detachably connected by a pipe joint in the filter.

[0009]

According to the first aspect of the present invention, the fire detection sensor is mounted on the joint box in the filter by the support member.
Since it is attached detachably , when you remove the filter, you can attach and detach the support member from under the hood,
It is possible to attach and detach the fire detection sensor from under the hood.

According to the second aspect of the present invention, since the fire extinguishing nozzle is detachably attached to the pipe joint in the filter by piping, when the filter is removed, the piping can be attached and detached from under the hood. The fire extinguishing nozzle can be attached and detached from below.

[0011]

【Example】

Embodiment 1 FIG. One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic view of the entire apparatus, and FIG. 2 is an exploded perspective view of a main part of FIG. 1. The same or corresponding parts as those of the conventional apparatus are denoted by the same reference numerals and description thereof is omitted.

In FIG. 1, reference numeral 13 denotes a joint box mounted in the grease filter 5, and an external wiring 14 is introduced through an upper hole 13a. Reference numeral 15 denotes a lid for closing the lower opening 13 b of the joint box 13, which is detachable with a screw 16. 17 is the joint box 1
A joint member 18 for a cap nut fixed to the side of 3 is a fire detection sensor, and has a screw portion 18a for a cap nut at the base. Reference numeral 19 denotes a support member such as a copper pipe having a shape extending from the inside of the duct 4 to the inside of the grease filter 5, and has joint cap nuts 19a and 19b at both ends. 20
Is a sensor wire of the fire detection sensor 18, 21 is a pipe fitting mounted inside the grease filter 5, and is connected to an external pipe 22. A fire extinguishing nozzle 23 is supported by a pipe 24 (copper tube) having a shape extending from the inside of the duct 4 to the inside of the grease filter 5.

Now, in the state shown in FIG. 1, the sensor wire 20 of the fire detecting sensor 18 passes through the support member 19 and through the through hole 17a of the joint member 17 to the joint box 13
Inside, and connected to the external wiring 14 in the joint box 13.

In this way, the system functions as an automatic fire extinguishing system for ducts. For example, when cleaning or replacing the fire detecting sensor 18, first, the grease filter 5 is removed, and the lid 15 of the joint box 13 is removed. Next, after disconnecting the connection between the sensor wire 20 in the joint box 13 and the external wiring 14, the cap nut 19 a is returned to remove the support member 19 from the joint member 17, and the sensor wire 20 is connected to the through hole 17 a of the joint member 17. Therefore, the fire detection sensor 18 together with the support member 19 can be lowered from the grease filter 5 onto the worktop 1, and the fire detection sensor 18 can be cleaned and replaced.

Next, when the fire detection sensor 18 is mounted in the duct 4, the cap nut 19 is attached to the support member 19.
After the fire detection sensor 18 is fixed by b, the support member 19 is lifted into the grease filter 5, the sensor wire 20 is passed through the through hole 17a of the joint member 17, and then the support member 17 is connected to the joint box by the cap nut 19a. 13, the sensor wire 20 and the external wiring 14 are connected in the joint box 13, the lid 15 is stopped, and the grease filter 5 is attached.

Since the fire extinguishing nozzle 23 has a pipe 24 detachable by a pipe joint 21, the grease filter 5 is provided.
Is removed and the pipe joint 21 is attached and detached.
Can be easily attached and detached from under the hood 3 similarly to the fire detection sensor 18.

Embodiment 2 FIG. In the first embodiment, the support member 19 is used.
Although a copper pipe is shown as a support member, the support member 19A having a U-shaped cross section shown in FIG.
The sensor line 20 of 8 is wired along the inside of the U-shape. Further, as other examples of the support member 19, there are various kinds of cross-sectional shapes shown in FIG.

Embodiment 3 FIG. In the first and second embodiments, the description has been made for a duct. However, as shown in FIG. 5, the present invention can also be implemented for a hood. In this case, the shapes of the support member 19 and the pipe 24 are the same as those shown in FIG. 19
A and 24A are sufficient.

[0019]

According to the first aspect of the present invention, by removing the filter in the hood, the fire detection sensor can be attached / detached from under the hood, so that the fire detection sensor can be easily cleaned and replaced.

According to the second aspect of the present invention, by removing the filter, the fire extinguishing nozzle can be attached and detached from under the hood, so that there is an effect that the fire extinguishing nozzle can be easily cleaned and replaced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an entire apparatus showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of FIG.

FIG. 3 is a partial perspective view showing Embodiment 2 of the present invention.

FIG. 4 is a sectional view showing still another example of FIG. 3;

FIG. 5 is a schematic view showing a third embodiment of the present invention.

FIG. 6 is a schematic view showing a conventional device.

FIG. 7 is a sectional view of a fire detection sensor part of FIG. 6;

FIG. 8 is a right side view of the fire detection sensor of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooking table 2 Range 3 Hood 4 Duct 5 Grease filter 13 Joint box 14 External wiring 18 Fire detection sensor 19 Support member 20 Sensor wire 21 Fitting 22 External piping 23 Fire extinguishing nozzle 24 Piping

Claims (2)

(57) [Claims] 1. A fire detection sensor and a fire-extinguishing nozzle are provided in a duct provided in a hood or a filter in a hood, and a joint box in which external wiring is introduced is disposed inside the filter. A support member for supporting the fire detection sensor, which is located from the inside of the duct to the inside of the filter or located in the filter, is detachably attached to the joint box, and a sensor wire of the fire detection sensor is attached to the support member. An automatic fire extinguisher characterized by being connected to the external wiring in the joint box. 2. An external pipe introduced into the filter and a pipe located from the duct to the inside of the hood or supporting the fire-extinguishing nozzle located in the filter and detachably connected in the filter by a pipe joint. The automatic fire extinguisher according to claim 1, wherein: