JPH08215330A - Fire extinguishing appliance for engine room - Google Patents

Abstract

PURPOSE: To repair the trouble of an electric valve driving means and an electric valve in advance by displaying the fact that the occurrence of a fault in electric valve driving means and electric valve sides is detected based on the detection of a valve opening/closing detecting means. CONSTITUTION: When a defective condition in the connection of an electrically operated valve 22 and a connector 152 occurs due to an unknown cause, or the contact of a limit switch 147 is located at the intermediate position between an HC terminal and an NO terminal, a transistor 112 is turned on, which inverts output to 'H'. Therefore, the output of an exclusive NOR gate 132 is inverted to'H' by the inversion of its input, which turns on a transistor 133. In such a way, a start-up/fault display lamp 33 puts on successively. Also, when the fault occurs in a motor driving IC element 128, the output of the exclusive NOR gate 132 is inverted to 'H' similarly, which turns on the transistor 133, and the start-up/fault lamp 33 puts on successively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine room fire extinguisher for extinguishing a fire in an engine room of a large bus such as a high speed bus and a long distance bus. More specifically, the invention relates to an electric valve for the engine room fire extinguisher. The present invention relates to a circuit for detecting a failure such as.

[0002]

2. Description of the Related Art A fire extinguishing system for an engine room of a large-sized bus has been proposed before. According to the idea, a monitoring / control panel installed near the driver's seat and a predetermined engine room Multiple heat-sensitive sensors installed at various locations, chemical tank and nozzle for extinguishing fire, electrical valve that opens and closes the flow path of the chemical in the chemical tank to the nozzle, and nozzle for the chemical in the chemical tank by air pressure When an at least one heat detection sensor detects a fire in the engine room, the alarm / buzzer, lamp lighting, etc. informs the operator of the fire, and the driver responds to this alarm. If you press the fire extinguishing start switch on the operation panel, the electric valve leading to the nozzle opens,
The extinguishing agent in the chemical tank is discharged from the nozzle by the air pressure in the air tank.

[0003]

In the conventional engine room fire extinguishing apparatus as described above, when a driver pushes the fire extinguishing start switch of the operation panel in the event of a fire, the electric valve leading to the nozzle is opened and the chemical tank is opened. Although the extinguishing agent of the above is released from the nozzle, if the electric valve is defective or the electric valve is not supplied with power due to poor connection, etc., it cannot be extinguished when a fire occurs. There was a problem.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an engine room fire extinguisher device which indicates when there is a failure in an electric valve or the like during operation.

[0005]

An engine room fire extinguishing system according to the present invention has a valve mounted between a chemical tank and a nozzle for opening and closing the chemical tank and the nozzle. An electric valve that outputs a signal based on this, a fire extinguishing start switch, an electric valve closing switch, and a valve closing command signal that is output in normal times, and a valve opening command when the above fire extinguishing start switch is turned on. A valve control means that outputs a signal and outputs the valve closing command signal when the electric valve closing switch is turned on, and fully closes the electric valve when the valve closing command signal is input. An electric valve driving means for fully opening the electric valve when the valve opening command signal is input, and a valve opening / closing detecting means for detecting opening / closing of the valve based on input of a signal from the electric valve. , Based on the detection of the valve opening / closing detection means, Type valve side and to determine whether a failure has occurred in the electric valve driving device, at the time of failure determination is obtained a failure determination means for displaying to that effect.

Further, the engine room fire extinguisher according to the present invention has a valve which is mounted between the medicine tank and the nozzle and opens and closes between the medicine tank and the nozzle. When the valve is fully closed, the valve is completely closed. An electric valve that outputs a closing signal and outputs a valve full-open signal when the valve is fully open, and the fire extinguisher control panel is shut off by the presence of a light-shielding plate by closing the lid that covers the fire extinguisher control panel. The lid opening / closing switch that is turned on when the light-shielding plate is released by opening, the fire extinguishing start switch that can be turned on when the lid is opened, the electric valve closing switch that can be turned on when the lid is opened, and the valve of the electric valve described above. A valve full-closed detection switch that turns on when a full-closed signal is input, a valve full-open detection switch that turns on when a valve full-open signal of the electric valve is input, and a valve when the lid opening / closing switch is off. Outputs the fully closed command signal, When the lid opening / closing switch and the valve full-closed detection switch are in the ON state, first valve control means for outputting a valve full-open command signal when the fire-extinguishing start switch is turned on, and the valve fully-opened detection switch in the ON state When the electric valve closing switch is turned on, a second valve control means for outputting a valve full closing command signal and a valve full closing command signal for the first valve controlling means are input. The valve closing command signal is output, and when the valve full opening command signal of the first valve control means is input, the valve opening command signal is output, and the valve full closing command signal of the second valve control means is input. When the valve closing command signal is input, the electric valve is fully closed, and when the valve opening command signal is input, the third valve control means outputs the valve closing command signal. Electric valve drive means to fully open the electric valve and indicator lamp However, when one of the valve full-closed detection switch and the valve full-opened detection switch is on, the indicator lamp is turned off, and when the valve full-closed detection switch and the valve full-opening detection switch are both on or off. Is provided with a failure determination means for turning on the display lamp.

[0007]

In the present invention, the valve control means normally outputs the valve closing command signal to the electric valve driving means, so that the electric valve driving means electrically operates based on the input of the valve closing command signal. The formula valve is fully closed. Therefore, the electric valve outputs a signal corresponding to the full closure of the valve, and the valve opening / closing detection means detects that the valve is fully closed by the input of the signal. Further, when the fire extinguishing start switch is turned on, the valve control means outputs a valve opening command signal to the electric valve driving means, and the electric valve driving means receives the electric valve opening command signal based on the input of the valve opening command signal. Fully open. Then, the electric valve outputs a signal corresponding to the full opening of the valve, and the valve opening / closing detection means detects that the valve is fully opened by the input of the signal. Furthermore, when the electric valve closing switch is turned on, the valve control means outputs a valve closing command signal to the electric valve driving means in the same manner as above, and the electric valve driving means inputs the valve closing command signal. Fully close the electric valve based on. Then, the electric valve outputs a signal corresponding to the full closure of the valve, and the valve opening / closing detection means detects that the valve is fully closed by the input of the signal. On the other hand, the failure determination means determines whether or not a failure has occurred in the electric valve drive means and the electric valve side based on the detection by the valve opening / closing detection means, and displays the fact when there is a failure. In particular, if the failure determination means displays a failure during normal times, it is possible to inspect the electric valve drive means and the electric valve side in advance to repair the failure point, so when a fire occurs it cannot be extinguished due to a failure. There is no such thing.

Further, in the present invention, the first
Since the valve control means outputs the valve full closing command signal to the third valve control means by turning off the lid opening / closing switch, the third valve control means outputs the valve closing command signal by inputting the command signal. The electric valve drive means outputs the electric valve to the electric valve drive means, and the electric valve drive means fully closes the electric valve based on the input of the valve closing command signal.
Therefore, the valve fully closed detection switch detects the valve fully closed signal from the electric valve and is in the on state. Further, the first valve control means outputs a valve full-open command signal to the third valve control means when the fire-extinguishing start switch is turned on while the lid opening / closing switch and the valve full-close detection switch are in the on state. Third
The valve control means outputs the valve closing command signal to the electric valve driving means by the input of the command signal, and the electric valve driving means fully opens the electric valve based on the input of the valve opening command signal and detects the valve full opening. The switch detects the valve full-open signal from the electric valve and turns on. Furthermore, the first valve control means outputs a valve full-close command signal to the third valve control means when the electric valve close switch is turned on while the valve full-open detection switch is in the on state,
The third valve control means outputs an electric command signal to the electric valve drive means in response to the input of the valve full-close command signal as in the normal state, and the electric valve drive means electrically operates based on the input of the command signal. The valve is fully closed, and the valve fully closed detection switch detects a valve fully closed signal from the electric valve and turns on. On the other hand, the failure determination means keeps the indicator lamp off when either one of the valve full-closed detection switch and the valve full-opened detection switch is on, and the full-closed detection switch and the valve full-opening detection switch are both on or off. In case of, the indicator lamp is turned on to notify the failure.

[0009]

FIG. 2 is a system diagram for explaining the construction of an engine room fire extinguisher according to an embodiment of the present invention. The fire extinguishing system includes a plurality of heat detection sensors 1 installed in the engine room 10 as a means for detecting a fire occurrence in the engine room, and a receiver 2 for issuing a fire alarm by inputting a fire detection signal from the heat detection sensor 1. The engine room fire extinguisher 20 having the nozzle 3 and the medicine tank 4 and the air tank 5 connected to the medicine tank 4 and the operation sequence of the fire extinguisher 20 are controlled and maintained. A fire extinguisher control panel 30 is used. As the air tank 5, the one equipped on a bus or the like is used. The chemical | medical agent tank 4 is installed in the vicinity of the air tank 5, the engine room 10, or its vicinity. The receiver 2 and the fire extinguisher control panel 30 are installed near the driver's seat.

The chemical tank 4 containing the fire extinguishing agent 21 is connected to the air tank 5 through a first flow path 11 which is an air supply path, and the first flow path 11 includes a protection valve 14,
An on-off valve 15, a check valve 16 and a safety valve 17 are provided. Further, a pressure switch 18 is provided for detecting the air pressure of the medicine tank 4, and the pressure display lamp 32 of the fire extinguisher control panel 30 is turned on when the prescribed air pressure is applied. .

The chemical tank 4 is further connected to a nozzle 3 installed in the engine room 10 by a second flow passage 12, and a third flow bypassing the second flow passage 12 and the first flow passage 11. A passage 13 is provided, a switching valve 19 is provided at the intersection of the two flow passages 12, 13, and a motor-operated valve 22 is provided downstream of the second flow passage 12. The valve of the motor-operated valve 22 is always closed, and the motor-operated valve opening display lamp 34 of the fire extinguisher control panel 30 is lit when a fire occurs or is opened during inspection. On the upstream side of the second flow path 12, a tip is a siphon tube 12a inserted up to near the bottom of the medicine tank 4. Further, the chemical tank 4 is provided with a liquid level gauge 24, a pressure gauge 25, a fire extinguishing agent supply plug 26, and a drain plug 27.

The fire extinguisher control panel 30 is provided with a power source lamp 31, which is a light emitting diode, a pressure display lamp 32, a start / failure display lamp 33, a motor-operated valve open display lamp 34, and a lid 35 when a fire occurs. When the switch is opened downward, the fire extinguishing start switch 36 and the motor-operated valve closing switch (recovery switch) 37 are exposed. If the protection plate 38 covering the fire extinguishing start switch 36 is strongly pressed, the motor-operated valve 22
Motor 22a is activated and the valve is opened. When the electric valve closing switch 37 is pressed, the electric valve 22 returns to the original fully closed state. Start-up/
The failure indicator lamp 33 is always off, and is temporarily lit during activation of the motor-operated valve, and is continuously lit when a failure occurs on the motor-operated valve side. Note that the electric valve 22 and the motor 22aha are examples of electric valves, and electromagnetic valves may be used as the electric valves. The electric valve close switch 37 is an example of an electric valve close switch.

FIG. 1 is a circuit diagram showing an electrical configuration of a fire extinguisher control panel of an engine room fire extinguisher according to an embodiment of the present invention, and FIG. 3 is a front sectional view of a lid opening / closing switch used in the fire extinguisher control panel. FIG. 4 is a partial side sectional view of FIG. 3, and FIG. 5 is a time chart for explaining the operation of the fire extinguisher control panel.

In the figure, 100 is a battery with a rated voltage of 24V mounted on a bus, 101 is a 0.5A fuse connected in series to a plus terminal 100a of the battery 100, and 102 is a plus terminal 100a and a minus terminal 100b of the battery 100. 12V constant voltage circuit connected to the fuse via a fuse 101, 103 is a 12V constant voltage circuit 102
Is connected to the output side of the 5V constant voltage circuit which receives the voltage of 12V and outputs a constant voltage of 5V, 104 is for reducing the ripple of the output voltage of each of the 12V constant voltage circuit 102 and the 5V constant voltage circuit 103. Electrolytic capacitor, 105
Are circuit protection diodes provided on the output sides of the 12V constant voltage circuit 102 and the 5V constant voltage circuit 103, respectively.

Reference numeral 106 denotes a photointerrupter built in the fire extinguisher control panel 30, which is composed of a photodiode 106a and a phototransistor 106b and is provided on the back side of the lid 35 of the fire extinguisher control panel 30. The light shielding plate 40 that goes in and out between the photodiode 106a and the phototransistor 106b performs an on / off operation, and the photointerrupter 106 and the light shielding plate 40 constitute a lid opening / closing switch (see FIGS. 3 and 4). The photodiode 106a of the photo interrupter 106 is connected between the positive terminal 100a and the negative terminal 100b of the battery 100 via the protective resistor 107 and the power lamp 31. The collector of the phototransistor 106b is provided on the positive side of the 5V constant voltage circuit 103 with the protective resistor 108.
And a lid open indicator lamp 109, and the emitter of the phototransistor 106b is a 5V constant voltage circuit 103.
Is connected to the negative side of Although not shown, the lid opening display lamp 109 is provided on the fire extinguisher control panel 30 and is installed at a position visible when the lid 35 is opened.

Reference numeral 111 is a pull-up resistor connected in series with the fire extinguishing start switch 36, and is provided between the plus side and the minus side of the 5V constant voltage circuit 103 together with the fire extinguishing start switch 36. Reference numeral 112 denotes a transistor of the valve fully closed detection switch, the collector of which is connected to the positive side of the 5V constant voltage circuit 103 via a pull-up resistor 113, and the emitter of which is the negative side of the 5V constant voltage circuit 103, that is, the DC power supply 100. It is connected to the minus terminal 100b, and its base is connected to the 5V constant voltage circuit 1 via the bias resistor 114.
03 is connected to the minus side and is also connected to the limit switch 147 of the electric valve 22 described later via the base current limiting resistor 115. Reference numeral 116 is a first OR gate, the input side of which is connected to the connection point of the fire extinguishing start switch 36 and the pull-up resistor 111 and the collector of the transistor 112, respectively.

Reference numeral 118 is a pull-up resistor connected in series with the motor-operated valve closing switch 37, and is provided between the motor-operated valve closing switch 37 and the 5V constant voltage circuit 103 between the plus side and the minus side. Reference numeral 119 is a transistor for a valve fully open detection switch, the collector of which is an electric valve open display lamp 34.
And the 5V constant voltage circuit 10 via the pull-up resistor 120.
3 is connected to the positive side, its emitter is connected to the negative side of the 5V constant voltage circuit 103, and its base is connected to the negative side of the 5V constant voltage circuit 103 via the bias resistor 121 and for limiting the base current. Resistance 122
Is connected to a limit switch 146 of the electric valve 22 described later.

Reference numeral 123 is a second valve constituting the first valve control means.
Is an OR gate of which the input side is the phototransistor 106.
It is connected to the connection point of the collector of b and the protection resistor 108 and the output side of the first OR gate 116, and is also connected to the positive side of the 5V constant voltage circuit 103 via the pull-up resistor 124. Reference numeral 125 is a third OR gate that constitutes the second valve control means, and its input side is connected to the collector of the transistor 119 and the connection point of the electric valve open display lamp 34, the connection point of the electric valve close switch 37 and the pull-up resistor 118. It is connected to the.

Reference numeral 126 is an RS which constitutes a third valve control means.
A flip-flop, whose input terminal D and clock terminal C
L is connected to the negative terminal 100b of the battery 100, its set terminal S is connected to the output side of the second OR gate 123, and its reset terminal R is connected to the output side of the third OR gate 125 via the protection resistor 127. Has been done. Reference numeral 128 is a motor drive IC that constitutes an electric valve drive means.
An element, whose input terminals 1 and 2 are RS flip-flops 1
26 output terminals Q and Q bar terminals. 12
Reference numeral 9 is a 24V constant voltage circuit which is connected between the positive terminal 100a and the negative terminal 100b of the battery 100 via an electrolytic capacitor 130 and outputs a voltage of 24.4V to the motor drive IC element 128. A voltage detector 131 detects the voltage of the 5V constant voltage circuit 103, and its output is on (0 when the voltage is 3.8V or less).
V), and if it is 3.8 V or more, it is turned off (high impedance).

Reference numeral 132 denotes an exclusive NOR gate, the input side of which is the collector of the transistor 112 and the transistor 119.
Connected to the collector and respectively. 133 is a transistor for a start / failure indicator lamp switch, and its collector has a start / failure indicator lamp 33 and a protective resistor 134.
Is connected to the plus terminal 100a of the battery 100 via the
0b, the base of which is connected to the minus terminal 100b through the bias resistor 135 and the output side of the exclusive OR gate 132 through the base current limiting resistor 136. The exclusive NOR gate 13
2, transistor 133 and start / failure indicator lamp 33
The failure determination means is constituted by.

Reference numeral 137 is a constant current circuit for a pressure detecting circuit which limits the current from the output voltage of the 12V constant voltage circuit 102, and its side is connected to one terminal of the pressure indicating lamp 32. A lamp protection diode 138 is connected in parallel to the pressure indicating lamp 32. Reference numeral 139 is a protective resistor connected to the pressure display lamp 32.

A pressure switch 140 is a constant voltage IC 14
1, a switch 18 that is turned on / off based on the air pressure in the drug tank, a transistor 142 that performs a switching operation according to the on / off state of the switch 18, and a bias resistor 143. The constant voltage IC 141
Is connected to the positive side of the 12V constant voltage circuit 137, the collector of the transistor 142 is connected to the other terminal of the pressure indicating lamp 32, and its base is the resistance 14
3 is connected to the negative terminal 100b of the battery 100.

The electrically operated valve 22 described above includes a motor 22a,
The limit switches 146 and 147, which are configured by a valve (not shown) that opens and closes the second flow path 12 based on the drive of the motor 22a, and operate based on the opening and closing of the valve, respectively in parallel with the limit switches 146 and 147, respectively. The circuit switching diodes 149 and 150 provided, and the heat generation prevention posistor 151 connected between the motor 22a and the NC terminal of the limit switch 146 are provided.

The limit switch 146 has its COM terminal connected to the terminal 3 of the motor drive IC element 128, and its N
The C terminal is connected to one terminal of the motor 22a as described above, and the NO terminal is connected to the base side of the transistor 119. When the valve is fully opened, it switches to the NO terminal side, and when the valve is fully closed, the NC terminal. Return to the side. The limit switch 147 has a COM terminal for the motor drive IC element 12
8 is connected to the terminal 5, the NC terminal is connected to the other terminal of the motor 22a, and the NO terminal is connected to the transistor 112.
Is switched to the NC terminal side when the valve is fully opened and returns to the NO terminal side when the valve is fully closed.
152 is a connector provided on the fire extinguisher control panel 30,
The battery 100, the electric valve 22 and the pressure switch 140 are connected to each other.

Next, the operation of the engine room fire extinguishing system will be described with reference to the circuit diagram of FIG. 1 and the time chart of FIG. In FIG. 5, t0 is t when the power is turned on.
1 to t4 show a normal monitoring state when the lid 35 is closed, and among them, t2 to t3 are operations when the fire extinguishing start switch 36 is turned on due to noise. The lid 3 from t4 to t13
5 is open, t4 to t5 show the normal monitoring state, t5 to t9 show the operation at the time of starting the electric valve,
From t9 to t13, the operation at the time of restoration of the motor-operated valve is shown, and t13 to t14
Indicates a normal monitoring state when the lid 35 is closed, t14 to t
15 indicates the operation when the limit switch fails or the connector is disconnected.

1. When the battery 100, the motor-operated valve 22, and the pressure switch 140 are connected to the connector 151 at power-on, respectively, FIG.
As indicated by t0, power is applied to the fire extinguisher control panel 30 and the power lamp 31 is turned on. At this time, in the voltage detector 131, as shown at t0 to t1 in FIG. 7 (J), the output of the 5V constant voltage circuit 103 is a predetermined voltage (for example, 3.8V).
0V (ON output) is output to the reset terminal R of the RS flip-flop 126 until the time t reaches (t in FIG. 5L).
0 to t1), and the RS flip-flop 126 is reset (see t0 to t1 in FIG. 5K). On the other hand, the second OR gate 123 has the lid 35 closed and the fire extinguishing start switch 36 is not pressed. Therefore, when power is applied, the H signal (valve full closing command signal) is output to the set terminal S of the RS flip-flop 126. ) Is output (see FIG. 5 (F)). Therefore, the RS flip-flop 126 sets the output Q to “L” (see FIG. 5 (N)), sets its inverted output Q bar to “H”, and closes the valve. Motor drive IC element 1 as command signal
To 28.

When the output of the 5V constant voltage circuit 103 reaches a predetermined voltage (see t2 in FIG. 5 (J)), the constant voltage detector 131 turns off and becomes high impedance (see FIG. 5 (L)). (See t1), the reset terminal R of the RS flip-flop 126 is set to “H” (see t1 in FIG. 5K), but the lid 35 of the RS flip-flop 126 is closed and the fire extinguishing start switch 36 is pushed. Therefore, the output is held (see FIG. 5N). Motor drive I
The C element 128 sets the terminal 3 to “L” by receiving the valve closing command signal from the RS flip-flop 126 (see FIG. 5).
(See (N)), terminal 5 is set to "H", and the valve closing voltage is output. Due to this output, a negative voltage is applied to the COM terminal of the limit switch 146 of the motor-operated valve 22.
A positive voltage is applied to the COM terminal of 47.

If the valve of the motor-operated valve 22 is open when the voltage is applied, the contact of the limit switch 146 is NO.
Since the contact of the limit switch 147 is on the NC terminal side on the terminal side, the current is the limit switch 147-motor 2
2a-POSISTOR 151-flows with the circuit switching diode 149 to drive the motor-operated valve 22 in the closing direction. At this time, the transistor 112 sets the output to “H” because the output of the motor driving IC element 128 is not applied between the base and the emitter, and the exclusive NOR gate 132 receives the “H” input and the “H” input from the transistor 119. As a result, the output is set to "H", the transistor 133 is turned on, and the start / failure display lamp 33 is turned on. When the motor-operated valve 22 is driven, the valve causes the contact of the limit switch 146 to NC.
When the contact of the limit switch 147 is switched to the terminal side to the NO terminal side, the motor 22a is stopped, and at this time, the output of the motor drive IC element 128 is applied between the base and the emitter of the transistor 112, so that the output is " The exclusive NOR gate 132 inverts its output to "L" by its "L" input, so that the exclusive NOR gate 132 is turned on.
Is turned off, and the start / fault display lamp 33 is turned off. When the motor-operated valve 22 is fully closed when the power is turned on, the contact of the limit switch 147 is on the NO terminal side.
The output of the C element 128 is applied to make the output "L" (see FIG. 5C), and the exclusive NOR gate 132 has its "L" input and the transistor 119 turned off (see FIG. 5H). The "H" input causes the output to be "L" (see FIG. 5 (O)), and the transistor 133 is turned off to keep the start / failure indicator lamp 33 off.

Even if the valve of the motor-operated valve 22 is fully closed, if the connection between the motor-operated valve 22 and the connector 152 is defective, or if the limit switch 147 fails, its contact points are NC and NO terminals. If it is in the middle of, the transistor 112 is turned off and the output is made "H".
The exclusive NOR gate 132 outputs "H" by its "H" input and "H" input from the transistor 119 to turn on the transistor 133 and keep the start / failure indicator lamp 33 lit (see FIG. O) see t14 to t15). Further, even if the motor drive IC element 128 has failed even though the power lamp 31 is lit, the transistor 112 is turned off to set the output to “H”, and therefore the exclusive NOR gate 132 outputs the output. Set to "H" to turn on the transistor 133, and start / failure display lamp 3
Keep 3 lit.

In this way, if the start / failure indicator lamp 33 continues to light when the power is turned on, it can be specified that either the electrically operated valve 22 side, the connector connection failure, or the motor drive IC element 128 failure. This has the effect that the cause of the failure can be easily investigated, and that the defective product will not be shipped.

2. Normal monitoring state When the motor-operated valve 22 is closed when the power is turned on, the transistor 112 is turned on as described above, so "L" is input to one end of the input of the first OR gate 116. Also, the lid 35 is closed and the photo interrupter 10
Since the 6th phototransistor 106b is off,
“H” is input to one end of the OR gate 123 of the. In this state, when the fire extinguishing start switch 36 is turned on due to noise (see t2 to t3 in FIG. 5B), the output of the first OR gate 116 becomes "L" (t2 in FIG. 5D).
To t3), since the second OR gate 123 has "H" input to one end, the output is always "H", and R
The output of the S flip-flop 126 is held (see FIG. 5).
(F) See t1 to t4 of (N)).

Further, as shown at t4 in FIG.
Even if 5 is opened and the photo interrupter 106 is turned on, if the fire extinguishing start switch 36 is not pressed, the output of the second OR gate 123 remains "H" as described above. Therefore, the output of the RS flip-flop 126 is held (see t4 to t5 in FIG. 5N). Further, since the valve of the motor-operated valve 22 is closed and the contact of the limit switch 146 is on the NC terminal side, the transistor 119 is off (see t4 to t5 in FIG. 5 (H)), and the motor-operated valve open display lamp 34 is turned off. are doing. Further, since the transistor 112 is on and the transistor 119 is off as shown at t4 to t5 in FIGS. 5C and 5H, the exclusive NOR gate 132 holds the output "L" and turns off the transistor 133. The start / failure indicator lamp 33 is turned off (see t4 to t5 in FIG. 5 (O)).

In this state, due to some reason, the connection between the motor-operated valve 22 and the connector 152 becomes defective, or the limit switch 147 malfunctions so that its contact points are NC and NO.
When it is in the middle of the terminals, the transistor 112 is turned off to invert the output to “H”, and the exclusive NOR gate 132
Reverses its output to "H", turns on the transistor 133, and keeps the start / failure indicator lamp 33 on. Even if the motor drive IC element 128 fails, the exclusive NOR gate 132 inverts the output to "H" and turns on the transistor 133 to start / start.
The failure display lamp 33 continues to light up.

As described above, even in the normal monitoring state, since the failure can be discriminated by lighting the start / failure indicator lamp 33, the failure point can be inspected and repaired in advance, and when the fire occurs, the fire is extinguished by the failure. It has the effect of not being forgotten.

3. Recovery Operation When Fire Occurs and After Fire Extinguishes When a fire occurs in the engine room 10, the heat detection sensor 1 detects this and the receiver 2 issues a fire alarm. The driver immediately stops at a place where it does not interfere with traveling and confirms the occurrence of a fire, and then opens the lid 35 of the fire extinguisher control panel 30 and presses the fire extinguishing start switch 36 (t5 in FIG. 5B).
~ T7). In this case, the light shielding plate 40 between the photodiode 106a and the phototransistor 106b is eliminated, so that the phototransistor 106b is turned on and "L" is input to one input side end of the second OR gate 123. Further, when the phototransistor 106b is turned on, the lid opening display lamp 109 is turned on, and t5 to t5 in FIG.
As shown at t6, the output of the first OR gate 116 becomes "L" by turning on the transistor 112 and the fire extinguishing start switch 36, and both inputs of the second OR gate 123 become "L" by its input. From t5 in FIG.
As shown at t6, the output becomes "L" (valve full open command signal) and is output to the set terminal S of the RS flip-flop 126 (see t5 to t6 in FIG. 5M). At this time,
RS flip-flop 1 as shown at t6 to t10 in (N)
26 inverts the output Q of the output Q to "H" and outputs the inverted output Q
The bar is inverted to "L" and is output to the motor drive IC element 128 as a valve opening command signal.

The motor drive IC element 128 outputs "H" from the output 3 and "L" from the output 5, that is, a voltage for closing the valve, and outputs a positive voltage to the COM terminal of the limit switch 146 of the electric valve 22. A negative voltage is applied to the COM terminal of the limit switch 147. At this time, if the motor-operated valve 22 is in the closed state, the contact of the limit switch 146 is on the NC terminal side and the contact of the limit switch 147 is on the NO terminal side, so that the current is the limit switch 146-positor 151.
-Motor 22a-Flow with circuit switching diode 150,
The electric valve 22 is driven in the opening direction. At this time, the transistors 112 and 119 remain off (see FIG.
(C) (t6 to t8 of (H)), exclusive NOR gate 1
32 sets the output to "H" (t6 to t8 in FIG. 5 (O)).
), The transistor 133 is turned on, and the start / failure display lamp 33 is turned on.

When the valve of the motor-operated valve 22 is fully opened, the contact of the limit switch 146 is switched to the NO terminal side and the contact of the limit switch 147 is switched to the NC terminal side by the valve. At this time, the motor 22a is stopped and the motor drive I is applied between the base and emitter of the transistor 119.
Since the output of the C element 128 is applied, the transistor 119 is turned on to turn on the motor-operated valve opening indicating lamp 34 (see t8 to t10 in FIG. 5 (H)).
One end of the OR gate 125 on the input side becomes "L". Further, at this time, the contact of the limit switch 147 is switched to the NC terminal side and the transistor 112 is turned off. Therefore, the exclusive NOR gate 132 is t8 in FIG. 5 (O).
The output is inverted to "L" to turn off the transistor 133 and turn off the start / failure indicator lamp 33 as shown at ~ t10.

After the fire extinguishing work is completed, the electric valve closing switch 37
When is pressed (see t9 to t11 in FIG. 5G), the inputs of the third OR gate 125 are both set to "L", so that the third OR gate 125, as shown at t9 to t10 in FIG. 125 inverts the output to "L" (valve full open command signal) and outputs it to the reset terminal R of the RS flip-flop 126. The RS flip-flop 126 is reset by the input of the signal (see t9 to t10 in FIG. 5 (K)), and outputs a valve closing command signal to the motor drive IC element 128 (see t10 onward in FIG. 5 (K)). . Motor drive IC element 128
When the valve closing command signal from the RS flip-flop 126 is input, the output 3 is “L”, the output 5 is “H”,
That is, the voltage for closing the valve is output, and a negative voltage is applied to the COM terminal of the limit switch 146 of the motor-operated valve 22 and a positive voltage is applied to the COM terminal of the limit switch 147 (FIG. 5 (N)).
See t10 onwards). At this time, if the valve of the motor-operated valve 22 is in the open state, the contact of the limit switch 146 is on the NO terminal side and the contact of the limit switch 147 is on the NC terminal side, so that the current is the limit switch 147-the motor 22a.
-POSISTOR 151-flows with the circuit switching diode 149 to drive the motor-operated valve 22 in the closing direction. At this time, since the transistors 112 and 119 remain off (see t10 to t12 in FIG. 5C), the exclusive NOR gate 132 inverts its output to “H” (see FIG. O) t10
Up to t12), the transistor 133 is turned on, and the start / failure display lamp 33 is turned on.

The valve of the motor-operated valve 22 is the second flow path 12
When the valve is completely closed, the contact of the limit switch 146 is moved to the NC terminal side by the valve, and the limit switch 147 is closed.
Contact switches to the NO terminal side. At this time,
The motor 22a is stopped, and the transistor 112 is turned on at t12 as shown in FIG.
Since 19 is off, the electric valve open display lamp 34 is turned off. The exclusive NOR gate 132 inverts its output to "L" as shown at t12 in FIG.
Is turned off, and the start / fault display lamp 33 is turned off. When the lid 35 is closed after confirming that the lamp 33 is off, the photo interrupter 106 is turned off (t in FIG. 5E).
See 13).

[0040]

As described above, according to the present invention, the failure determination means determines whether or not a failure has occurred in the electric valve drive means and the electric valve side based on the detection of the valve opening / closing detection means. , In case of a failure, I have displayed that fact.
It is possible to inspect the electric valve drive means and the electric valve side in advance to repair the faulty part, and there is no possibility that the fire cannot be extinguished due to a fault when a fire occurs.

Further, according to the present invention, the failure determination means is
When either the valve full-closed detection switch or the valve fully-opened detection switch is on, leave the indicator lamp off,
Both the fully closed detection switch and the valve fully opened detection switch are turned on,
Alternatively, when it is off, the indicator lamp is lit to notify the failure, so that the electric valve drive means and the electric valve side can be inspected in advance to repair the failure point in the same manner as above, and when the fire occurs, the fire extinguishes due to the failure. There is no reason why you cannot do it.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an electrical configuration of a fire extinguisher control panel of an engine room fire extinguisher according to an embodiment of the present invention.

FIG. 2 is a system diagram for explaining the configuration of an engine room fire extinguisher according to an embodiment of the present invention.

FIG. 3 is a front cross-sectional view of a lid opening / closing switch used for a fire extinguisher control panel of an engine room fire extinguisher.

FIG. 4 is a partial side sectional view of FIG.

FIG. 5 is a time chart for explaining the operation of the fire extinguisher control panel.

[Explanation of symbols]

 22 Motorized Valve 22a Motor 100 Battery 106 Photointerrupter 123 Second OR Gate 126 RS Flip Flop 128 Motor Drive IC Element 132 Exclusive NOR Gate

Claims (3)

[Claims] 1. An engine room fire extinguisher having an air tank, a chemical tank connected to the air tank via a check valve, into which a fire extinguishing agent is injected, and a nozzle for injecting the fire extinguishing agent of the chemical tank. An electric valve that is mounted between the medicine tank and the nozzle and that opens and closes between the medicine tank and the nozzle, and that outputs a signal based on the opening and closing of the valve; a fire extinguishing start switch; The valve closing switch and the valve closing command signal are output normally, and the valve opening command signal is output when the fire extinguishing start switch is turned on.
When the electric valve closing switch is turned on, the valve control means outputs the valve closing command signal, and when the valve closing command signal is input, the electric valve is fully closed to open the valve opening command. An electric valve driving means for fully opening the electric valve when a signal is input, a valve opening / closing detecting means for detecting opening / closing of the valve based on an input of a signal from the electric valve, and a valve opening / closing detection means An engine provided with a failure determination means for determining whether or not a failure has occurred in the electric valve side and the electric valve driving means based on the detection of the means, and displaying the fact when the failure is determined. Room fire extinguisher. 2. An engine room fire extinguisher having an air tank, a chemical tank connected to the air tank via a check valve, into which a fire extinguishing agent has been injected, and a nozzle for injecting the fire extinguishing agent of the chemical tank. A valve that is mounted between the medicine tank and the nozzle and that opens and closes between the medicine tank and the nozzle, outputs a valve full-close signal when the valve is fully closed, and outputs a valve when the valve is fully open. An electric valve that outputs a full-open signal and a built-in fire extinguisher control panel that turns off when a light shielding plate is present by closing the lid that covers the fire extinguisher control panel, and that opens when the light shielding plate is removed by opening the lid. Switch, fire extinguishing start switch that can be turned on when the lid is opened, electric valve closing switch that can be turned on when the lid is opened, and all valves that turn on when the valve full closing signal of the electric valve is input. With a close detection switch A valve full-open detection switch that is turned on when the valve full-open signal of the electric valve is input, and a valve full-close command signal is output when the lid open / close switch is off, and the lid open / close switch and the valve full-close detection are output. First valve control means for outputting a valve full-open command signal when the fire-extinguishing start switch is turned on when the switch is in the on state, and the electric valve closing switch when the valve full-open detection switch is in the on state. A second valve control means for outputting a valve full closing command signal when turned on, and a valve closing command signal for outputting the valve full closing command signal of the first valve control means, The valve opening command signal is output when the valve full opening command signal of the first valve control means is input, and the valve closing command signal is output when the valve full closing command signal of the second valve control means is input. Third valve control means, and the valve closing finger When an instruction signal is input, the electric valve is fully closed, and when the valve opening command signal is input, the electric valve is fully opened. When either one of the full-closed detection switch and the valve full-opened detection switch is on, turn off the indicator lamp, and when both the valve full-closed detection switch and the valve full-opening detection switch are both on or off, turn on the indicator lamp. An engine room fire extinguisher, comprising: a failure determination unit that lights up. 3. The failure determination means outputs an L level signal when either one of the valve full-closed detection switch and the valve full-opened detection switch is ON, and the valve full-closed detection switch and the valve full-opening are output. An exclusive NOR gate that outputs an H level signal when the detection switches are both on or off, a transistor that turns on when an H level signal is input, and an indicator lamp that lights when the transistor is in the on state. The engine room fire extinguisher according to claim 1 or 2, wherein