JP3267717B2 - 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 extinguisher for detecting the occurrence of a fire in a building or the like and automatically extinguishing the fire.

[0002]

2. Description of the Related Art An automatic fire extinguisher which detects a fire and automatically injects a fire extinguishing agent such as powder or liquid has been proposed and implemented.
These automatic fire-extinguishing devices are connected to fire detectors such as smoke detectors and heat detectors installed in the monitoring area, and fire extinguishing agent is fired by the activation signal of these detectors. If the connection terminal of the fire detector is short-circuited by mistake during inspection of the equipment, etc.
There was a risk of injecting.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems in the prior art and to provide an automatic fire extinguishing system in which the fire extinguishing agent is not accidentally injected during an inspection operation. is there.

[0004]

The present invention employs the following technical configuration to achieve the above object. In other words, it starts in a fire and releases the extinguishing agent.
In automatic fire extinguishing systems,
Inspection start and end by opening and closing the door of the housing part
Inspection operation detecting means for detecting completion of operation and fire extinguishing agent injection activation means
The first switch which is turned on by the activation of the
When the crop detection means detects the start of inspection, it turns off and the inspection
Turns on when the operation detection means detects the end of inspection.
A switch, a fire extinguisher discharge means, and the discharge means are activated.
A power supply for supplying a start-up voltage to
Between the first switch and the second switch
Are connected in series .

[0005]

Since the automatic fire extinguisher according to the present invention employs the above-described technical configuration, even if the connection terminal of the fire detector is short-circuited by mistake during the inspection operation,
As long as the fire extinguishing agent release inhibiting means is effectively operated, the problem that the fire extinguishing agent is injected from the fire extinguishing agent injection nozzle is completely avoided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of an automatic fire extinguisher according to the present invention will be described below in detail with reference to the drawings. FIG. 1 or FIG.
FIG. 1 is a view schematically illustrating a configuration of a specific example of the automatic fire extinguisher according to the present invention. Basically, in the automatic fire extinguisher 1 that is activated by a fire signal of a fire detector 8 and discharges a fire extinguishing agent. When checking the fire extinguishing function of the automatic fire extinguishing apparatus, a check operation detecting means 51 for detecting the check operation and a fire extinguishing agent discharge preventing means 5 for preventing the release of the fire extinguishing agent at the time of the check.
0 is provided with the automatic fire extinguisher 1 provided with 0.

Further, in the automatic fire extinguisher 1 according to the present invention, the inspection operation detecting means 51 includes the automatic fire extinguisher 1.
It is preferable to detect the start and end of the inspection operation in response to the opening and closing of the door 2 of the housing 10 in which the control means 5 is stored. Further, the automatic fire extinguisher 1 according to the present invention.
In this case, the fire extinguishing agent release inhibiting unit 50 is driven in response to the switch unit 521 driven in response to the output signal of the inspection operation detecting unit 51 and the output signal of the fire extinguishing agent injection starting unit 53. It is preferable that the switch means 541 and the switch means 541 are connected to a predetermined power supply V via the control means 55 connected in series.

Further, in the automatic fire extinguisher 1 according to the present invention, at least one of the switch means 521, 5
Reference numeral 41 denotes a relay. Hereinafter, a specific example of the automatic fire extinguisher 1 according to the present invention will be described with reference to the drawings. FIG. 1 shows the appearance of an automatic fire extinguisher according to the present invention.
Reference numeral 10 denotes a cabinet of the main body of the automatic fire extinguishing apparatus, which houses a fire extinguisher cylinder 6 and a control unit 5 therein, has an opening in the front, and has doors 2 and 2 'in the opening. The door 2 is provided with an operation unit 20, a display unit 22, and the like, and can be opened and closed.

The operation section 20 is provided with an operation panel necessary for controlling the operation of the automatic fire extinguisher 1, and the display means 22 is not particularly limited. For example, a notification means using a buzzer or a lamp may be used, or a notification or display means using voice or text may be used. An open / close detection switch 3 detects the open / closed state of the door. Reference numeral 4 denotes a fire extinguishing agent injection nozzle. Inside the cabinet 10, a control unit 5, a fire extinguisher cylinder 6, an initiator 7 for opening the fire extinguisher cylinder, and the like are housed. The control unit 5 includes an inspection operation detecting unit 51, a relay 52, a fire extinguishing agent injection starting unit 53, and the like of the cabinet 10 described later, and is connected to a fire detector 8 installed in the monitoring target area.

FIG. 2 is a block diagram showing a main part of the present invention, that is, a control section 5. 51 is an inspection operation detecting means, 52 is a relay, and its contacts ll1521, 53 are fire extinguishing agent injection activating means, 54 is a relay and its contacts rl2541. The inspection operation detecting means 51 is connected to the open / close detection switch 3 of the cabinet door 2.

The fire extinguishing agent injection activating means 53 used in the present invention responds to the detection signal of the fire detector 8, that is, the fire signal, through the control means 5 in response to the fire signal. For example, when the fire detector 8 outputs a fire signal, the fire extinguishing agent injection activating means 5 is controlled via the control means 5.
3 is driven, whereby the switch means 541 of the control means 55 is turned on, so that the initiator 7 is driven and the fire extinguishing agent is injected from the fire extinguishing agent injection nozzle 4.

However, when in the inspection mode,
A predetermined output signal is output from the inspection operation detecting means 51,
As a result, the switch means 521 becomes non-conductive, so that the initiator 7 is not driven.
Extinguishing agent can be prevented from being injected from the extinguishing agent injection nozzle 4. Hereinafter, the operation of the automatic fire extinguisher 1 according to the present invention will be described in detail.

First, in a normal monitoring state, that is, when the cabinet door is closed, the relay contact rl152
1 is made, and the relay contact rl2541 is broken. Here, when the fire detector 8 detects a fire, the fire extinguishing agent injection activating means 53 drives the relay 54 to make the contact rl2541. Since a voltage of 24 V is always applied to the terminal, the current is rl2541 and rl1.
Power is supplied to the initiator 7 via 521, and the initiator 7 operates. The operation of the initiator 7 opens the fire-extinguishing agent cylinder 6 in which the fire-extinguishing agent is stored, and the fire-extinguishing agent is discharged from the injection nozzle 4 through the pipe. Next, the operation at the time of inspection will be described. At the time of inspection, control unit 5 and fire extinguisher cylinder 6
The cabinet door 2 is opened in order to check. As the open / close detection switch 3, a reed switch is provided on the door, and a magnet is provided on the cabinet side at a position facing the reed switch of the door when the door is closed, and the reed switch detects the magnetic force of the magnet. I have. Here, when the door 2 is opened, the reed switch does not detect the magnetic force and the open / close detection switch 3 is opened. The cabinet door open detection circuit 51 activates the relay 52 when detecting the opening of the open / close detection switch 3. Relay 52 breaks its contact rl1521. In this state, for example, the inspector erroneously short-circuits the terminal to which the fire detector 8 is connected, enters a fire detection state, and the fire extinguishing agent injection activating means 53 operates the relay 54 to make the contact rl254.
Even if 1 is made, the initiator 7 is not energized. In the present embodiment, a magnet and a reed switch are used as the cabinet door open / close detection switch 3. However, the invention is not limited thereto, and a limit switch, a photoelectric switch, or the like may be used. Further, in the present embodiment, the inspection operation is detected by opening the door 2, but a key may be installed on the door 2 and the relay 52 may be operated upon detecting that the key is unlocked.

[0014]

Since the automatic fire extinguisher according to the present invention employs the above-described configuration, the fire extinguishing agent injection starting means is erroneously driven during the inspection operation, and the control means 55 is not operated.
Even if the switch means 541 is turned on, the other switch means 521 of the control means 55 is kept in a non-conductive state, so that erroneous injection of the fire extinguishing agent is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a configuration of an automatic fire extinguisher according to the present invention.

FIG. 2 is a block diagram showing a configuration example of an automatic fire extinguisher according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Automatic fire extinguisher 2, 2 '... Door part 3 ... Open / close detection switch 4 ... Injection nozzle 5 ... Control part 6 ... Fire extinguisher cylinder 7 ... Initiator 8 ... Fire detector 10 ... Cabinet 20 ... Operation part 22 ... Display means 50 ... fire extinguishing agent release inhibiting means 51 ... inspection operation detecting means 52, 54 ... relay 53 ... fire extinguishing agent injection starting means 55 ... control means

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A62C 37/50 A62C 37/36

Claims (1)

(57) [Claims] 1. An automatic fire extinguisher which starts up in a fire and releases a fire extinguishing agent .
Inspection operation detection that detects inspection start and end by opening and closing
Means and a first switch which is turned on by activation of the extinguishing agent injection activation means.
Off when the switch and the inspection operation detecting means detect the start of inspection.
Turns on when the inspection operation detecting means detects the end of inspection.
A second switch, a fire extinguishing agent discharging means, and a power supply for supplying a starting voltage for activating the discharging means.
The first switch and the second switch between the power source and the discharging means.
An automatic fire extinguisher characterized by connecting two switches in series .