JPH09120488A - Automatic fire alarm receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the humidity resistance of a CPU board by sealing the whole of the board and to prevent the receiver from discontinuing its operation despite occurrence of a malfunction. SOLUTION: A 1st CPU 5 performs the display of images to an operator, the I/O control of a switching operation, etc., and a print-out operation of a printer, etc. A 2nd CPU 6 performs the accumulation of monitoring states of a fire sensor, the control of a smoke prevention/exhaustion device against the fire occurrence and the processing and storage of information against the trouble occurrence. A 1st clock part 7 has a crystal vibrator and gives an operation clock to the CPU 5, and a 2nd clock part 8 has a crystal vibrator and gives an operation clock to a 2nd CPU 6. These CPU 5 and 6 and parts 7 and 8 are sealed up respectively by a sealing material. The sealing material uses the insulating resin such as the silicone resin, epoxy resin, etc.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an automatic fire alarm receiver of an automatic fire alarm system.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIG. FIG. 4 is a block diagram of an automatic fire alarm system.

In FIG. 4, 1 is a fire detector, 2 is a repeater, and 3 is an automatic fire alarm receiver.

The fire detectors 1 are respectively provided at important points in the building, detect smoke and heat around the installation position, and transmit a fire signal to the automatic fire alarm receiver 3.

The relay 2 is provided between the fire detector 1 and the automatic fire alarm receiver 3 to relay a fire signal.

[0006] The automatic fire alarm receiver 3 monitors the fire signal from the fire detector 1 and displays the monitoring result on the screen of the display device. When the fire signal is received from the fire detector 1, the automatic fire alarm receiver 3 displays on the screen of the display device. The location of the fire is displayed on the screen and an alarm is output to notify the security personnel of the occurrence of the fire.

Inside the automatic fire alarm receiver 3, there is provided a CPU board 4 having a central processing unit (hereinafter referred to as CPU), a clock section, a storage section, etc. mounted therein, and the CPU board 4 transmits and receives signals. Also, the screen of the display device is displayed.

In the automatic fire alarm system configured as described above, when the fire detector 1 detects a fire, it sends a fire signal to the automatic fire alarm receiver 3 and receives the fire signal. Aircraft 3 gives an alarm.

[0009]

The automatic fire alarm receiver as shown in FIG. 4 described above is used in various regions, but no countermeasure is taken in a high humidity environment. .

Therefore, for example, when the above-mentioned automatic fire alarm receiver is used in a building in a humid area where there is a rainy season, water droplets condensed in the automatic fire alarm receiver due to high humidity are
There is a problem in that the CPU and the clock unit may malfunction due to attachment to the surface of the CPU board 4 and the operation of the automatic fire alarm receiver may stop.

The present invention has been made in order to solve the above problems, and an object thereof is to use the above-mentioned automatic fire alarm receiver in a building in a humid area with a rainy season. However, due to dew condensation, CP
An object of the present invention is to provide an automatic fire alarm receiver in which there is no fear that the U and the clock unit will malfunction and stop operating.

[0012]

In order to solve the above problems, the present invention provides a fire detector in which a central processing unit and a clock unit for synchronization are mounted. CPU that receives a fire signal from a computer and outputs an alarm
In an automatic fire alarm receiver having a board, the entire CPU board is sealed.

According to the second aspect of the present invention, an automatic fire having a central processing unit and a clock unit for synchronization and having a CPU board for receiving a fire signal from a fire detector and outputting an alarm. In the notification receiver, a part of the CPU board is sealed.

According to the third aspect of the present invention, an automatic fire having a central processing unit and a clock unit for synchronization and having a CPU board for receiving a fire signal from a fire detector and outputting an alarm. In the notification receiver, the central processing unit and the clock unit are sealed.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. Figure 1 shows the CPU of the automatic fire alarm receiver
It is a block diagram of a board. FIG. 2 is a front view of the CPU board. FIG. 3 is a sectional view for explaining the sealing method.

In FIG. 1, 1 is a fire detector, 2 is a relay device, 3 is an automatic fire alarm receiver, and 4 is a CPU board. On the CPU board 4, a first CPU 5 corresponding to the central processing unit, a second CPU 6 corresponding to the central processing unit,
A first clock unit 7 corresponding to a clock unit, a second clock unit 8 corresponding to a clock unit, a buffer 9, a first random access memory 10 (hereinafter referred to as RAM), a second RAM 11, a first read. Only memory 12 (hereinafter referred to as ROM), second ROM 13, transmission CPU
14 and are implemented.

The first CPU 5, which is composed of a chip a and a chip b shown in FIG. 2, displays a screen to the operator, controls I / O such as operation of switches, prints out to a printer or the like. Is to do.

The second CPU 6 is composed of a chip c and a chip d shown in FIG. 2, and accumulates the monitoring status of the fire detector, controls smoke-preventing equipment when a fire occurs, and when trouble occurs. Processing and information storage.

The first clock section 7 has a crystal oscillator and supplies an operation clock to the first CPU 5. The second clock unit 8 has a crystal oscillator and supplies an operation clock to the second CPU 6.

The buffer 9 includes a first CPU 5 and a second C
A memory for temporary storage of data used when transmitting / receiving data to / from the PU 6, and including a first CPU 5
And the second CPU 6 read / write data from / to the buffer 9.

The first RAM 10 stores data processed by the first CPU 5. Second RAM 11
Stores the data processed by the second CPU 6.

The first ROM 12 stores a program describing the operation of the first CPU 5. The second ROM 13 stores a program describing the operation of the second CPU 6.

The transmission CP 14 receives a fire signal from the fire detector 1 and outputs it to the first CPU 5 and the second CPU 6.

The parts described above are mounted on a substrate 15, as shown in FIG. As shown in FIG. 3, the first CPU 5, the second CPU 6, the first clock unit 7, and the second clock unit 8 are sealed with a sealing material 16.

The sealing material 16 is an insulative resin such as a silicon resin or an epoxy resin, and a dome is formed so as to cover the packages such as the chips a and b that form the first CPU 5, and the chip is formed. A, b, etc. are sealed.

In FIG. 2, the first CPU 5 and the second C 5
The PU 6, the first clock unit 7, and the second clock unit 8 occupy only about 20% of the total mounting area. However, by sealing the main part of the CPU board as described above, , The moisture resistance is significantly improved.

[0027]

Since the automatic fire alarm receiver of the present invention is constructed as described above, in the invention of claim 1, the CPU board is sealed, so that the humidity resistance of the CPU board is high. Therefore, even if the automatic fire alarm receiver is used in a building in a humid area where there is a rainy season, the central processing unit and clock unit malfunction due to water droplets that condense. It is possible to provide an automatic fire alarm receiver that does not have a risk of stopping.

According to the first aspect of the present invention, since the entire CPU board is sealed, the humidity resistance of the CPU board is improved. Therefore, the automatic fire alarm receiver is installed in a building in a humid area where there is a rainy season. Even when using the, it is possible to provide an automatic fire alarm receiver that does not have a risk of stopping operation due to malfunction of the central processing unit and the clock unit due to dew condensation etc. Play.

According to the second aspect of the present invention, since the CPU board is partially sealed, the humidity resistance of the CPU board is improved, and therefore automatic fire alarm reception is performed in a building in a humid area with a rainy season. Even if the machine is used, the central processing unit and the clock unit will not malfunction due to water droplets that condense, and the operation will not stop.Because the sealing part is a part, it is inexpensive. It is possible to provide an automatic fire alarm receiver.

According to the third aspect of the present invention, the humidity resistance of the CPU board is remarkably improved even though the central processing unit and the clock unit are only sealed instead of the entire CPU board. Therefore, even if the automatic fire alarm receiver is used in a building in a humid area with a rainy season, the central processing unit and the clock unit malfunction due to water droplets that condense, and the operation stops. There is no fear, and since the sealing portion is limited to a very small portion, it is possible to provide an inexpensive automatic fire alarm receiver.

[Brief description of the drawings]

FIG. 1 is a block diagram of a CPU board of an automatic fire alarm receiver according to the present invention.

FIG. 2 is a front view of a CPU board.

FIG. 3 is a cross-sectional view illustrating a sealing method.

FIG. 4 is a block diagram of an automatic fire alarm system.

[Explanation of symbols]

 1 Fire detector 3 Automatic fire alarm receiver 4 CPU board 5 Central processing unit 6 Central processing unit 7 Clock section 8 Clock section

Claims (3)

[Claims] 1. An automatic fire alarm receiver having a central processing unit and a clock unit for synchronization, which has a CPU board for receiving a fire signal from a fire detector and outputting an alarm, An automatic fire alarm receiver characterized by being sealed. 2. An automatic fire alarm receiver having a central processing unit and a clock unit for synchronization, and having a CPU board for receiving a fire signal from a fire detector and outputting an alarm, a part of the CPU board. An automatic fire alarm receiver, which is characterized by sealing. 3. An automatic fire alarm receiver having a central processing unit and a clock unit for synchronization and having a CPU board for receiving a fire signal from a fire detector and outputting an alarm, the central processing unit and An automatic fire alarm receiver characterized by having a clock part sealed.