JP3287925B2 - Fire detector with repeater function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection unit for detecting an element of a fire phenomenon, a judgment circuit for judging whether or not there is a fire according to the detection unit, and outputting a judgment result, and a signal line. And a transmission circuit for transmitting the result of the determination to the fire receiver.

[0002]

2. Description of the Related Art Conventionally, a general type of fire detector in a fire alarm system has a fire detection unit for detecting a fire phenomenon, and determines whether or not there is a fire according to the output of the fire detection unit, and short-circuits a fire signal. A switching circuit that outputs a signal. As described above, since the general-type fire detector does not have a transmission circuit for transmitting a coded signal to the fire receiver, to add an address to the signal of the general-type fire detector and transmit the signal to the fire receiver, A general type fire detector is connected to a repeater having an address signal transmitting function, and a signal is transmitted to a fire receiver via the repeater. If you do this,
An address signal can be added to signals of a plurality of general-type fire detectors via a repeater and transmitted to a fire receiver.

When a general fire detector is provided in isolation, the general fire detector is not connected to the repeater, and an adapter having a repeater function, that is, an adapter having a transmission / reception circuit is provided. It is installed on a general type fire detector, and signals are transmitted to the fire receiver via this adapter. Specifically, a predetermined space is secured on the back of the base of the general type fire detector, and the adapter is installed in this space.

[0004]

However, in the above conventional example, a unit type repeater is installed in order to add addresses to a plurality of general-type fire detectors and transmit the signals to the fire receiver. It is necessary, the cost of this repeater is high, and the work of installing the repeater is complicated,
In order to install a general type fire detector in isolation, it is necessary to secure a space for an adapter on the back of the base of the general type fire detector, and this space is relatively large, which is disadvantageous in construction. There is.

According to the present invention, when transmitting signals of a plurality of general-type fire detectors to a fire receiver, there is no need to install a repeater, and when a general-type fire detector is provided in isolation.
It is an object of the present invention to provide a fire detector with a repeater function that does not require a large space on the back of the base of a general type fire detector.

[0006]

According to the present invention, there is provided a detecting section for detecting an element of a fire phenomenon, and a determining circuit for determining whether or not a fire has occurred according to an output signal of the detecting section and outputting the result of the determination. A transmission circuit for transmitting the result of the determination to the fire receiver via a first signal line; and a reception circuit for receiving a signal indicating the operation of another fire detector via a second signal line. Wherein the transmission circuit sends out a fire signal in accordance with the result of the determination, and the transmission circuit sends out a fire signal in accordance with the output signal of the receiving circuit.

[0007]

According to the present invention, a receiving circuit for receiving the operation of another fire detector via a second signal line is provided in addition to the detecting section, the discriminating circuit, and the transmission circuit, and based on the discrimination result of the discriminating circuit. Since the transmission circuit sends out a fire signal and the transmission circuit sends out a fire signal based on the output signal of the receiving circuit, when transmitting signals of multiple general-type fire detectors to a fire receiver, a unit-type relay There is no need to install a vessel,
When the general-purpose fire detector is provided in isolation, the space required for the receiving circuit is small, so that there is no need to provide a large space behind the base of the general-purpose fire detector.

[0008]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

In this embodiment, the fire detector 10 with a repeater function comprises a main body 10s and a base 10b.
The main body 10 s includes a first detection unit 11 and a first determination circuit 1.
2, a first transmission circuit 13, and a reception circuit 14.

The first detecting section 11 detects a physical quantity of a fire phenomenon such as smoke, heat, flame, gas or odor. The first discriminating circuit 12 has, for example, a plurality of different fire discriminating levels. Then, it is a circuit that determines which level the fire corresponds to in accordance with the output signal of the first detector 11 and outputs the result of this determination.

Further, the first transmission circuit 13 is a circuit for sending the result of the judgment by the judgment circuit 12 to a fire receiver (not shown) by adding a self address or the like via a first signal line SL1. The receiving circuit 14 is a circuit that receives a signal indicating the operation of the general fire detector 21 via the second signal line SL2. In other words, the receiving circuit 14 is a circuit that receives a signal indicating the operation of another fire detector via the second signal line SL2. The first transmission circuit 13 sends out a fire signal in accordance with the result of the judgment by the judgment circuit 12 and sends out a fire signal in accordance with the output signal of the reception circuit 14. The first transmission circuit 13 is provided with a dip switch, an EEPROM, and the like (not shown) for setting a self-address and setting a general fire detector.

The general type fire detector 21 includes a main body 21s and a base 21b. The main body 21s includes a second detecting unit DE for detecting a physical quantity of a fire phenomenon, and a second detecting unit D.
A switching circuit SW that determines whether or not a fire has occurred in response to the output signal of E and short-circuits the second signal line SL2 to output the result of the determination (ie, a fire signal).
And a fire detector having: Note that the second signal line SL
2 is a current limiting resistor that limits the current flowing through the second signal line SL2 when the general fire detector 21 operates, and the switching circuit S
W is an example of a second determination circuit that determines whether or not there is a fire according to the output signal of the second detection unit DE and outputs the result of this determination.

Next, the operation of the first embodiment will be described.

In the fire detector with repeater function 10, when the first detector 11 detects a fire phenomenon, the first determination circuit 12 determines which level of the fire is based on the physical quantity. Then, the first transmission circuit 13 transmits a fire signal and the address of the fire detector with a repeater function 10 to a fire receiver (not shown) by a coded signal. Also,
When the second detection unit DE in the general-type fire detector 21 detects a fire phenomenon, a fire signal is generated by operating the switching circuit SW, and the fire signal is generated by the second fire signal.
Is sent to the receiving circuit 14 via the signal line SL2. The receiving circuit 14 sends a signal indicating that the general type fire detector 21 has transmitted a fire signal to the first transmission circuit 13, and transmits the fire signal and the address of the general type fire detector 21 to a fire receiver (not shown). To the first transmission circuit 13. That is, not only a fire signal is simply sent to the fire receiver, but also one of the status information indicates that the general-type fire sensor 21 connected to the fire detector 10 with the repeater function has detected a fire phenomenon. Send a signal.

According to the above embodiment, the general fire detector 2
1 is provided in isolation, the receiving circuit 14 is connected to the fire detector 2
1, the base 2 of the fire detector 21
There is no need to provide a large space on the back of 1b. Further, since the main body 10a of the fire detector 10 can be removed from the installation surface using the fire detector detachable device, the fire detector 10 can be easily removed, and therefore the fire detector 10 and the fire detector 21 can be easily removed. Work such as changing the address setting is easy.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

This second embodiment is basically the same as the embodiment shown in FIG. 1, except that a fire detector 10 with a relay function is provided with a general fire detector 21 as well as a general fire detector 21. Detector 2
2, 23 and 24 are connected, and general fire detectors 21 and 2
4 and the receiving circuit 14 are connected by a second signal line SL3, and resistors R1 and R2 are connected in the middle of the second signal line SL3.
2, R3 and R4 are connected. Resistance R
The values of 1, R2, R3, and R4 are different from each other. Further, each configuration of the general-type fire detectors 22, 23, and 24 is the same as the configuration of the general-type fire detector 21. In FIG. 2, the fire detector 10 with the repeater function and the general type fire detectors 21 to 24 are shown.
, The main bodies 10s, 21s and the bases 10b, 21b
The display indicating the delimiter is omitted.

Next, the operation of the second embodiment will be described.

When the second detection unit DE in any of the general type fire detectors 22 to 24 detects a fire phenomenon,
When the switching circuit SW connected to the second detection unit DE operates, a fire signal is generated, and the fire signal is transmitted to the receiving circuit 14 via the second signal line SL3.
Sent to

Even if the general type fire detectors 21 to 24 themselves are the same, the values of the resistors R1 to R4 are different from each other. Therefore, the receiving circuit 14 can recognize which of the general type fire detectors 21 to 24 has operated. The receiving circuit 14 includes the general type fire detectors 21 to 21.
24, a signal indicating which one of the fire signals has been transmitted is sent to the first transmission circuit 13, and the activated general fire detectors 21 to 21 are activated.
The first transmission circuit 13 sends the address 24 and the fire signal to a fire receiver (not shown). That is, not only the fire signal is sent to the fire receiver, but also one of the general fire detectors 21 to 24 connected to the fire detector 10 with the repeater function detects the fire phenomenon as one of the state information. Sends a signal indicating whether the operation has been performed. Note that the common line C in FIG.
The resistor R provided for L may be omitted. In this case, the resistors R1 to R4 also function as current limiting resistors.

In the above embodiment, when signals of a plurality of general-type fire detectors are transmitted to a fire receiver, it is not necessary to install a repeater for each of the fire detectors. Since the fire detector 10 with the repeater function can be removed from the surface, it is easy to remove the fire detector 10 with the repeater function. Therefore, the address setting of the fire detector 10 with the repeater function, the general type fire detector Operations such as changing the address settings of 21 to 24 are easy.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

The third embodiment is basically the same as the second embodiment, except that a second signal line SL4 is provided instead of the second signal line SL3, and the resistors R1 to R4 are provided instead. The difference is that resistors R11 to R41 are provided.

That is, a series circuit of a general type fire detector 21 and a resistor R11 is connected to the receiving circuit 14, and a general type fire detector 22 and a resistor R21 are connected in series with the general type fire detector 21. A circuit is connected, a series circuit of a general type fire detector 23 and a resistor R31 is connected in parallel with the general type fire detector 22, and a general type fire detector 24 is connected in parallel with the general type fire detector 23. And a series circuit of a resistor R41. Therefore, the general type fire detector 21
Operates, the load resistance of the receiving circuit 14 becomes the resistance R11. When the general-type fire detector 22 operates, the receiving circuit 1
4 is a series circuit of the resistors R11 and R21, and if the general type fire detector 23 operates, the receiving circuit 14
Is a series circuit of resistors R11, R21, and R31, and if the general-type fire detector 24 operates, the load resistance of the receiving circuit 14 becomes resistors R11, R21, R31, and R41.
And a series circuit.

As described above, the general fire detectors 21 to 24 are provided.
Since the load resistance of the receiving circuit 14 changes according to the general-type fire detector that has operated, the current flowing through the second signal line SL4 changes, and the receiving circuit 14 detects this change in current. The activated general type fire detector can be specified.

The receiving circuit 14 sends to the first transmission circuit 13 a signal indicating which of the general type fire detectors 21 to 24 has transmitted the fire signal, and the first transmission circuit 13 sends the signal as the fire signal. The address of the activated general type fire detectors 21 to 24 is transmitted, and a signal indicating which of the general type fire detectors 21 to 24 has detected the fire phenomenon is transmitted.

In the third embodiment, the second signal line S
Since two L4s are used, the construction is easy, and a large number of general fire detectors can be connected within a range in which a voltage change due to resistance can be detected.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

In the fourth embodiment, high-performance fire detectors 21a to 24a are provided instead of the general-type fire detectors 21 to 24 in the third embodiment, and the high-performance fire detectors 21a to 21a are provided.
4a are connected in parallel with the receiving circuit 14.

The high-performance fire detector 21a has, for example, a second detection unit DE for detecting a physical quantity of a fire phenomenon and, for example, a plurality of different fire discrimination levels. A second determination circuit SH for determining whether or not the fire corresponds to the level and outputting a result of the determination;
A second transmission circuit TR for adding a self-address to the judgment result in the second judgment circuit SH and sending the self-address to the fire receiver 10 with a repeater function via the second signal line SL5. . The high-performance fire detectors 22a, 23
a, 24a have a configuration similar to that of the high-performance fire detector 21a, and include the high-performance fire detectors 21a, 22a, 23a, 24.
The second transmission circuit TR in each of (a) has address setting means such as a dip switch and an EEPROM (not shown), which are assigned different addresses, and communicates with the receiving circuit 14 using these addresses.

In the fourth embodiment, each of the high-performance fire sensors 21a to 24a detects a physical quantity of a fire phenomenon and sends out status information (fire information, normality of the sensor, abnormal information, etc.). Performs the same operation as the fire detector 10 with the repeater function, but the state information transmitted by the high-performance fire detectors 21a to 24a is received by the reception circuit 14 of the fire detector 10 with the repeater function. It is sent to the fire receiver via the circuit 14.

The fourth embodiment is useful when it is necessary to increase the number of fire detectors to be installed due to a change in the section of a fire monitoring area. In other words, the same fire detectors as the existing ones can be installed as additional fire detectors after the change of the fire monitoring area, so that the same monitoring function as the originally designed one can be achieved without modifying the whole. It is possible to realize the equipment.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

The fifth embodiment is basically the same as the fourth embodiment, but is different from the fourth embodiment in that the fire detector 10 with a repeater function is replaced by a fire detector with a repeater function. The difference is that a fire detector 10a is provided. The fire detector with repeater function 10a includes a third transmission circuit 15 in addition to the first detection unit 11, the first determination circuit 12, the first transmission circuit 13, and the reception circuit 14. Third transmission circuit 1
Reference numeral 5 denotes a circuit for transmitting a fire signal according to the output signal of the receiving circuit 14 via the first signal line SL1. In addition,
The receiving circuit 14 receives a signal from the second transmission circuit TR of the advanced fire detectors 21a to 24a via the second signal line SL5.
This is a circuit for receiving a signal indicating the operation of the high-performance fire detectors 21a to 24a.

In the fifth embodiment, the state information transmitted by the high-performance fire detectors 21a to 24a is received by the reception circuit 14 of the fire detector 10a with the repeater function, and the reception circuit 14 and the second transmission It is sent to the fire receiver via the circuit 15.

According to the fifth embodiment, the electric circuit of the fire detector 10a with the repeater function is replaced by the detector part (the first detector 1).
1, the first discriminating circuit 12, the first transmission circuit 13) and the repeater portion (the receiving circuit 14, the second transmission circuit 15), and the second transmission circuit 15 The operation load of the circuit 13 is reduced.

In the second to fifth embodiments, four fire detectors are connected to the fire detectors 10 and 10a with the relay function, but instead of four fire detectors, two fire detectors are provided.
Three or more than five fire detectors may be connected. In addition, fire detectors 10 and 10a with a relay function,
The high-performance fire detectors 21a to 24a may have, for example, their discrimination circuits 12 and SH having only one fire discrimination level, or may have other functions added.

[0038]

According to the present invention, when signals of a plurality of general-type fire detectors are transmitted to a fire receiver, there is no need to install a repeater, and the general-type fire detectors are provided in isolation. In this case, there is an effect that it is not necessary to provide a large space behind the base of the general type fire detector.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

[Explanation of symbols]

 10, 10a: fire detector with repeater function, 11: first detector, 12: first determination circuit, 13: first transmission circuit, 14: reception circuit, 15: third transmission circuit, 21 -24: General type fire detector 21a-24a: High-performance fire detector DE: Second detection unit SW: Switching circuit as a second determination circuit SH: Second determination circuit TR: Second 2, a transmission circuit SL1, a first signal line, and SL2 to SL5 a second signal line.

Claims (3)

(57) [Claims] A first detection unit for detecting an element of a fire phenomenon; and a first determination for determining whether or not a fire has occurred according to an output signal of the first detection unit, and outputting a result of the determination. Circuit;
A first transmission circuit for transmitting the result of the determination to the fire receiver via a first signal line; and a reception circuit for receiving a signal indicating the operation of another fire detector via a second signal line And wherein the first transmission circuit transmits a fire signal in accordance with the result of the determination and transmits a fire signal in accordance with an output signal of the reception circuit. Fire detector with detector function. 2. The fire detector according to claim 1, wherein the other fire detector is a general fire detector or a high-performance fire detector, and wherein the general fire detector detects a fire element. A fire detector having a detection unit and a second determination circuit that determines whether a fire has occurred according to an output signal of the second detection unit and outputs a result of the determination to the second signal line. The high-performance fire detector includes the second detection unit, the second determination circuit, and the determination result and the self address in the second determination circuit via the second signal line. A fire detector having a second transmission circuit for transmitting to a fire receiver with a repeater function. 3. A first detection section for detecting an element of a fire phenomenon; a first determination for determining whether or not a fire has occurred according to an output signal of the first detection section, and outputting a result of the determination. Circuit;
A first transmission circuit for transmitting the result of the determination to the fire receiver via the first signal line; and a second transmission circuit for the other fire detector via the second signal line, And a third transmission circuit for transmitting a fire signal in accordance with an output signal of the reception circuit via the first signal line. A fire detector with a repeater function.