JPS59140599A - Fire signal receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 〔Technical field〕 This invention relates to a fire receiver.

[Background technology]

A conventional fire receiver receives a signal from a smoke detector 1, etc., becomes a self-retainer, and continuously generates a fire alarm signal. However, smoke detectors connected to this fire receiver tend to malfunction due to electrical noise, insect intrusion, cigarette smoke, etc., and the fire receiver also malfunctions accordingly, causing continuous fire alarm signals to be sent out. will occur,
Fire alarms are unreliable, and with the current security system in which fire alarm signals are sent over long distances via telephone lines, and people are dispatched based on this signal to check for fires, false alarms can cause a great deal of trouble. It was something to put on.

[Purpose of the invention]

The object of the present invention is to provide a fire receiver that can improve the reliability of fire alarm.

[Disclosure of the invention]

The fire receiver of the present invention includes a self-holding fire alarm signal generation means that generates a fire alarm signal in response to the activation of a detector, and a timer that starts operation in response to the activation of the fire alarm signal generation means. and a self-holding release means for releasing the self-holding of the fire alarm signal generating means in response to the time-limited output of the timer means.

With this configuration, when a fire actually occurs, the detector continues to operate, so the fire alarm signal generating means continues to generate the fire alarm signal, albeit intermittently. Therefore, when the detector is activated for a short period of time, the fire alarm signal generating means is activated for a correspondingly short period of time, and if the sensor stops operating, the generation of the fire alarm signal will stop, which increases the reliability of the fire alarm. can be improved.

A second invention includes, in addition to the structure of the first invention, a counting means for counting the number of activations of the fire alarm signal generating means or the self-holding release means, and a counter that counts the number of times the fire alarm signal generating means or the self-hold release means is activated, and the self-holding means responds to the counting of a certain number by the counting means. A self-holding release preventing means for disabling the holding and releasing means is added to prevent wasteful operation of the fire alarm signal generating means and the self-holding releasing means.

A fire receiver according to an embodiment of the present invention will be explained based on FIG. In FIG. 1, E is a DC power source. C is a capacitor, Ro is a variable resistor, R2 to R4 are resistors, T
r is a transistor, which constitutes a timer circuit. RY Engineering is a recovery relay, ryl.

is the relay contact. RY2 to RYn are the district relays, ')'21 to 'Ynl and ry22 to ryn2 are their relay contacts, respectively. RYn+
1 is a fire relay, rY(n+lJl -'Y(n+1
)2 and rY(n+1)3 are its relay contacts. B is a fire bell, LP is a fire lamp, CL is a common terminal, and L or Ln-1 is a sensor connection terminal. Do or Dn-0 are smoke detectors (heat detectors etc. are also possible), IF is an interface for transmitting fire alarm signals to the outside, S
o is recovery suirichi.

Next, the sequence operation of this fire receiver will be explained in detail. For example, when the smoke detector D1 connected between the sensor connection terminal Ll and the common terminal CL is activated, the district relay RY2 is energized from the DC power supply E through the relay contact ry1□, the relay contact ry21 is closed, and the Relay RY2 enters the self-holding state, relay contact rY22 closes, and fire II relay Yn+1 is energized. As a result, relay contact rY(n+1)l closes, fire bell B rings, fire lamp LP lights up, and relay contact r)'(n+1)2 closes to charge capacitor C. is started, and further relay ')'(n
+1) By closing 3, the fire alarm signal is sent to interface I.
It is sent to the outside via F.

Thereafter, the voltage of the capacitor C increases as time passes, and after a certain period of time, the transistor T becomes conductive and energizes the recovery relay RY.As a result, the relay contact RY
11 has been opened and District Relay RY2 and Fire Relay RY
3 stops, relay contact ry2:t -'Y2
2 IrY(n+1)l-ry(n+1)2 and (5
) r)'(n+1)3 is opened and the self-holding of district relay RY2 is released, and the sounding of fire bezel 3/B and lighting of fire lamp LP are stopped, and furthermore, the charging of capacitor C is stopped and discharged. starts, and external transmission stops.

In addition, after the transistor Tr becomes conductive, the relay contact rY
The time it takes for (n-1-1)2 to open is the capacitor C
Since charging continues, relay contact rY (n+1
)2 is open, the voltage of capacitor C is equal to the voltage of transistor T.
r is higher than the threshold for conduction.

After that, the voltage of the capacitor C decreases as time passes, and after a certain period of time, the transistor Tr is cut off and the power supply to the recovery relay RY1 is stopped, and the relay contact rY
11 is closed and returns to the initial state.

At this time, if the smoke detector D1 continues to operate, the above operation will be repeated many times. In addition, if the operation of the smoke detector D1 is due to a malfunction and lasts only a short time, the above operation may be performed only once, or may be repeated two or several times (6). The alarm operation will end.

In addition, there is a manual recovery switch S. It also returns to the initial state when turned on. Similar operations are performed when the other smoke detectors D2 to Dn-1 are activated. Further, by changing the resistance value of the variable resistor R1, the cycle of the repetitive operation can be adjusted.

In this way, the fire receiver of this embodiment is a self-holding type district relay RY due to the activation of the smoke detector RY-Dn-1.
By activating 2 to RYn and activating fire relay RYn+1, a fire alarm signal is generated, and
The timer circuit is activated to automatically restore the signal after a certain period of time has elapsed, so when a fire actually occurs, the fire alarm signal will continue to be generated, albeit intermittently, and in the case of a malfunction, it will only occur for a short period of time. Since there is no fire alarm signal in between, the reliability of fire alarm can be improved.

A fire receiver according to another embodiment of the present invention will be explained based on FIG. 2. In Fig. 2, ry12 is the recovery relay R
This is the relay contact of Y1. A is a decimal counter that counts the number of openings and closings of relay contact RY2, S is a switching switch, RYn+2 is a recovery stop relay, r)'(n+2)1
is a relay contact of restoration stop relay RYn+2, and Do and D2 are diodes.

The operation of this fire receiver will be explained. That is, 1
A 0-base counter A counts the number of times the relay contact 'V12 is opened and closed, and sets the output terminal to a high level according to the count value. That is, each time the same repetitive operation as that shown in FIG. 1 is performed, the output terminals become flat level. Now, as shown in the figure, the contact piece of the changeover switch S1 is connected to the decimal counter A.
If it is not connected to any output terminal, repeat the operation many times in the same way as in Figure 1, and then
If the contact piece of edge S1 is connected to the output terminal corresponding to r5J of decimal counter A, the number of repetitions (number of restorations)
5 times, the restoration stop relay RYn+2 is energized and the relay contact ry(n+2)l is opened, which prevents the energization to RYl, which is related to the on/off of the transistor Tr, and closes the relay contact ry(n+2)l. At the same time, the relay contacts ry- and 2 are opened to stop the recovery, and thereafter, the conventional operation is performed.

Restoration Sui Fuchi S. When turned on, the decimal counter A is reset.

In the above embodiment, the recovery switch/edge S. is also used to reset the decimal counter A, but a recovery switch and border S are provided separately. It may be made to be linked with. Also,
A new relay contact 'y(n) is added to the recovery stop relay RYn+2.
+2)" and this relay contact rY(n+2)2 can be used in place of the +3 relay contact ry(n-14)3.

Other operations are similar to those of the previous embodiment.

As a result of this configuration, unnecessary opening/closing operations of each relay contact can be prevented, and the service life can be extended.

〔Effect of the invention〕

According to this invention, the reliability of fire alarm in a fire receiver can be improved.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of one embodiment of the invention, and FIG. 2 is a circuit diagram of another embodiment of the invention. RYl...Recovery relay (self-hold release means), RY2
(9) ~RYn... District relay (fire alarm signal generation means),
RYn+1...Fire relay (fire alarm signal generation means)
, C... Capacitor (timer means), R1... Variable resistor, R2-R4... Resistor, Tr... Transistor, A... Decimal counter (counting means), RYn+2.
・Recovery stop relay (self-hold release prevention means), D~
Dn-1...Smoke detector (10)

Claims (1)

[Scope of Claims] 111 A self-holding fire alarm signal generation means that generates a fire alarm signal in response to the operation of a W& alarm, and a timer that starts operation in response to the operation of the fire alarm signal generation means. and self-holding release means for releasing the self-holding of the fire alarm signal generating means in response to the time-limited output of the timer means. 121 A self-holding fire alarm signal generation means that generates a fire alarm signal in response to the operation of the W& alarm, a timer means that starts operation in response to the operation of the fire alarm signal generation means, and this timer means. self-holding canceling means for canceling the self-holding of the fire alarm signal generating means in response to a time-limited output; a counting means for counting the number of times the fire alarm signal generating means or the self-holding canceling means is operated; and this counting means. self-holding release prevention means for disabling the self-holding release means in response to a certain number of counts by the fire receiver.