JP2006235782A - Fire alarm system for residence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a newly configured fire alarm system for residences which can supply a system driving power source to all fire alarm slave units, even if disconnection occurs in a power feeding line for supplying a system drive power source from a fire alarm master unit to the fire alarm slave units, and thereby exhibits improved reliability of fire monitoring functions. <P>SOLUTION: A plurality of fire alarm slave units 2 are loop-connected through a power feed line and a common line to a fire alarm master unit 1 having a system drive power source, and the fire alarm master unit 1 is provided with a power source supply means for selectively supplying the drive power source of this system, from at least one of an upper stream side and a lower stream side to the power feeding line. The power supply means is provided with a disconnection-detecting means for detecting the disconnection of the power feed line on the downstream side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an improvement in a residential fire alarm system configured by connecting a fire alarm master unit having power supply means and a fire alarm slave unit that operates by receiving a drive power supply from the fire alarm master unit.

  This type of residential fire alarm system is already used in general households and is well known.

  FIG. 7 is a diagram showing a basic configuration of a residential fire alarm system shown in Patent Document 1 below. The fire alarm master unit 100 and the fire alarm slave unit 200 are installed at appropriate locations in the dwelling unit, detect fire factors such as smoke and heat, output a fire alarm, and interlock with the other master unit 100 or the slave unit 200. A fire alarm is output in conjunction with a control signal.

The fire alarm master unit 100 and the fire alarm slave unit 200 are connected to each other by two lines of a power supply line and a common line, and the fire alarm slave unit is connected through the power supply line by the system driving power source of the fire alarm master unit 100. 200 driving power is supplied, and the fire alarm unit 200 operates in response thereto.
JP-A-1-2017799

  By the way, in such a residential fire alarm system, when the power supply line is disconnected, the fire alarm unit downstream from the disconnection point becomes inoperable, and when the power supply line is short-circuited with the common line, the power supply line cannot be used. Therefore, there is a problem that the fire monitoring function, which is the purpose of use of the residential fire alarm system, cannot be fully exhibited.

  The present invention has been proposed to solve such a problem. Even if a disconnection or a short circuit occurs in a power supply line for supplying system drive power from a fire alarm master unit to a fire alarm slave unit, all fire alarms are provided. It is an object of the present invention to provide a fire alarm system for a house having a novel configuration in which the drive power supply to the device can be performed and the reliability of the fire monitoring function is improved.

  In order to achieve the above object, the following first and second present inventions are proposed. Claims 1 and 3 propose the first aspect of the present invention. In claim 1, a fire alarm master unit having a system drive power source is connected to a plurality of fire alarm slave units by a power supply line and a common line. The fire alarm master unit is configured in a loop connection and is equipped with power supply means that can selectively supply the system drive power to the power supply line from at least one of the upstream side and the downstream side. The means has a configuration in which disconnection detecting means is provided on the downstream side in order to detect disconnection of the power supply line.

  According to a third aspect of the present invention, the fire alarm master unit and the fire alarm slave unit are configured by loop connection with at least two power supply lines except for the common line. The system drive power can be selectively supplied to the power supply line from at least one of the upstream side and the downstream side, and a short-circuit detecting means for detecting a short circuit of at least one of the power supply lines is provided on the upstream side. The first power supply switching contact for selectively supplying the system drive power supply to the two or more power supply lines from the upstream side, and the system drive power supply selective to the two or more power supply lines from the downstream side A second power supply switching contact for supplying power to the first and second power supply switching contacts, and the first and second power supply switching contacts are controlled to be switched in accordance with the detection operation of the short circuit detecting means and the disconnection detecting means. .

  On the other hand, claim 2 proposes the second aspect of the present invention. In claim 2, a fire alarm master unit having a system drive power source is provided with a plurality of fire alarm slave units at least 2 except for a common line. The fire alarm master unit includes power supply means that can selectively supply system drive power from two or more power supply lines. Has a configuration in which either one of the short-circuit detection means and the disconnection detection means is provided in each of the two or more power supply lines.

  According to Claims 1 and 3, since the power supply means of the fire alarm master unit is provided with the short-circuit detection means for detecting a short circuit of at least one of the two or more power supply lines on the upstream side, When any one of the short-circuits occurs, power can be supplied to the power supply line through another power supply line in conjunction with the first power supply switching contact.

  In addition, since a disconnection detecting means is provided on the downstream side of the fire alarm master unit to detect each disconnection of the power supply line, when a disconnection occurs in the power supply line, the power supply line is linked with the second power supply switching contact. Power feeding to the electric wire can be performed not only from the upstream side but also from the downstream side.

  According to claim 2, since the power supply means of the fire alarm master unit is provided with the short-circuit detecting means and the disconnection detecting means corresponding to each of the two or more power supply lines, When a short circuit occurs, system drive power can be selectively supplied to each of two or more power supply lines in conjunction with the power supply switching contact.

  Embodiments of the present invention will be described below.

  FIG. 1 is a diagram showing an example of a basic configuration of a residential fire alarm system according to the first aspect of the present invention. In the first aspect of the present invention, the fire alarm master unit 1 and the fire alarm unit 2 are installed at appropriate places in the house, and are connected in a loop by the power supply line and the common line, and when a disconnection occurs in the power supply line, By switching the drive power supply direction from one direction to two directions, a backup function for supplying system drive power to all the fire alarm master units 1 and 2 is achieved.

  As such a first aspect of the present invention, FIG. 1 shows an example in which the fire alarm master unit 1 and the fire alarm slave unit 2 are connected by two or more power supply lines and a common line. The unit 1 supplies system drive power to the fire alarm unit 2 using any one of the power supply lines as a main power supply line.

  FIG. 2 is a diagram showing an example of the internal configuration of such a system of the present invention. The fire alarm master unit 1 includes a power supply means 10 for supplying driving power to the fire alarm slave unit 2, a control circuit 11 for controlling the master unit 1, and driving of the master unit 1 or the fire alarm slave unit 2. A power circuit 12 for supplying power, a signal circuit 13 for outputting a fire-linked control signal when the detection circuit 15 detects a fire factor, and an acoustic circuit for outputting an alarm sound when a fire is detected or a fire-linked control signal is received 14, a detection circuit 15 for detecting a fire factor such as smoke and heat, and an operation circuit 16 having various operation keys.

  One fire alarm handset 2 includes a control circuit 21 for controlling the handset 2 and a signal circuit 22 for outputting a fire-linked control signal when the detection circuit 24 detects a fire factor. An acoustic circuit 23 that outputs an alarm sound when receiving a signal, a detection circuit 24 that detects a fire factor such as smoke and heat, and an operation circuit 25 having various operation keys are provided.

  The power supply means 10 of the fire alarm master unit 1 exhibits the backup function described above. FIG. 3 is a diagram showing an example of the basic configuration of the power supply means 10 for performing such a backup function.

  The power supply means 10 is provided with a short-circuit detection means 10c for detecting a short-circuit of at least one of the power supply lines L1 and L2 on the upstream side, and a disconnection detection means 10a for detecting the disconnection of both the power supply lines L1 and L2. 10b is provided on the downstream side.

  The power supply means 10 selects the first power supply switching contact Ry for selectively supplying power to the power supply lines L1 and L2 and the power supply to the power supply lines L1 and L2 from the downstream side. The second power supply switching contacts Ry1 and Ry2 for performing the operation are provided, and the first and second power supply switching contacts Ry˜ Ry2 switching control is performed.

  In such a configuration, the power supply line L1 is normally used as the main power supply line, and the system drive power supply V is supplied from the upstream side toward the downstream side. Therefore, normally, the power supply switching contact Ry is in the a side, and the power supply switching contacts Ry1 and Ry2 are in the off state.

  When a short circuit occurs between the power supply line L1 and the common line C, the short-circuit detection means 10c detects this because the current value increases on the upstream side of the power supply line L1, and controls the power supply switching contact Ry to control the b side. And the main power supply line is changed to the power supply line L2.

  As a result, the main power supply line can be switched to the power supply line L2 from the power supply line L1 that cannot be used due to the occurrence of a short circuit, and the system drive power V can be supplied to each of the fire alarm devices 2.

  The disconnection detection means 10a detects when the disconnection occurs in the power supply line L1, the voltage value decreases on the downstream side of the power supply line L1, detects this, and controls the power supply switching contact Ry1 to turn on, and only from the upstream side. The system drive power supply V is also supplied from the downstream side.

  As a result, the system drive power supply V can be supplied from both the upstream side and the downstream side to the disconnected portion of the power supply line L1.

  When disconnection occurs in the feeder line L2, the disconnection detecting means 10b detects this because the voltage value decreases on the downstream side of the feeder line L2, and controls this to turn on the feed switching contact Ry2, and from the upstream side only. The system drive power supply V is also supplied from the downstream side.

  As a result, the drive power supply V can be supplied from both the upstream side and the downstream side to the disconnected portion of the feeder line L2.

  FIG. 4 is a diagram schematically showing the switching control operation of the power supply switching contacts Ry to Ry2 during the backup operation of the drive power supply in such a configuration.

  As described above, the power supply means 10 normally uses the power supply line L1 as the main power supply line and supplies the system drive power V from the upstream side to the downstream side as described above. Therefore, normally, the power supply switching contact Ry is in the a side, and the power supply switching contacts Ry1 and Ry2 are in the off state.

  In this state, when the power supply line L1 is disconnected, the power supply switching contacts Ry and Ry2 remain in the same state, and only the power supply switching contact Ry1 is controlled to be in the ON state, so that the system drive power supply V is supplied from the upstream side of the power supply line L1. Not only from the downstream side.

  On the other hand, when a short circuit occurs between the power supply line L1 and the common line C, the power supply switching contact Ry is set to the b side, the main power supply line is switched to the power supply line L2, and the relays Ry1 and Ry2 are turned off. The system drive power supply V is supplied from the upstream side of the power supply line L2.

  Further, when the power supply line L2 is used as the main power supply line, if the power supply line L2 is disconnected, the power supply switching contact Ry is set to the b-side state and the power supply switching contact Ry1 is kept in the off state. The switching contact Ry2 is switched to the ON state, and the system driving power source V is supplied not only from the upstream side of the feeder line L2, but also from the downstream side.

  Here, the feed lines are not limited to the two systems of the feed lines L1 and L2, but a feed line is further added, and a disconnection detecting means is provided on the downstream side of the added feed line, and feed lines other than the added feed line are provided. In this case, by providing a combination of a disconnection detecting means and a short-circuit detecting means, the above-described backup operation may be sequentially performed for each power supply line.

  FIG. 5 is a diagram showing an example of the basic configuration of the second present invention. In the second aspect of the present invention, the fire alarm master unit 3 and the fire alarm slave unit 4 are connected by connecting at least two systems, the power supply lines L1 and L2, and the common line C. The system is configured to supply the system driving power of the fire alarm slave unit 4 from one of the two or more power supply lines L1 and L2 from the power supply means of the alarm master unit 3.

  Even in such a configuration, as in the first aspect of the present invention, each of the fire alarm master unit 3 and the fire alarm slave unit 4 outputs its own alarm sound when it detects a fire factor such as smoke or heat. The fire interlock control signal is output to the other master unit 3 and the slave unit 4, and the alarm sound is output in conjunction.

  For this reason, the second inventive system includes a power supply means 30 in place of the power supply means 10. Since the configuration other than the power supply means 30 is the same as that of the first inventive system, description thereof is omitted.

  FIG. 6 is a diagram showing an example of the internal configuration of the power supply means 30 of the fire alarm master unit 3 having such a configuration.

  The power supply means 30 can selectively supply the system drive power V from two or more power supply lines L1 and L2. Each of the power supply lines L1 and L2 has a short-circuit detection means 30c and 30d and a disconnection. The detection means 30a and 30b are provided.

  Further, each of the power supply lines L1 and L2 has a power supply switching contact Ry for selectively supplying the system drive power V, and is detected by the short-circuit detection means 30c and 30d and the disconnection detection means 30a and 30b. In accordance with the operation, the power supply switching contact Ry is controlled to be switched.

  In such a configuration, in the normal state, the power supply switching contact Ry is in the state of a, and the system drive power V is supplied to the fire alarm unit 2 using the power supply line L1 as the main power supply line.

  When the power supply line L1 is disconnected or when the power supply line L1 is short-circuited with the common line C, the disconnection detection means 30a detects the disconnection, and the short-circuit detection means 30c detects the short-circuit. Switching to the b side, the main feed line is switched to the feed line L2, and the system drive power V is supplied from the upstream side of the feed line L2.

  Here, the feeder lines are not limited to the two systems of the feeder lines L1 and L2, but a combination of feeder lines and corresponding disconnection detecting means and short-circuit detecting means is further added, and the feeder lines other than the feeder line L1 are main. If the power supply line is disconnected or short-circuited, the main power supply line may be switched to another power supply line.

  For example, when a combination of a power supply line (not shown) and a corresponding disconnection detection means and short-circuit detection means is added and the power supply line L2 is used as the main power supply line and a disconnection or short-circuit occurs, the power supply switching contact Ry is set. It may be controlled to switch to a power supply line with a main power supply line added.

The figure which shows an example of the basic composition of 1st this invention The figure which shows an example of the internal structure of 1st this invention The figure which shows an example of an internal structure of the power supply means of 1st this invention The figure which shows the basic operation | movement of 1st this invention typically The figure which shows an example of the basic composition of 2nd this invention The figure which shows an example of the internal structure of the power supply means of 2nd this invention Diagram showing the basic configuration of a conventional fire alarm system

Explanation of symbols

1,3 Fire alarm master unit 2,4 Fire alarm slave unit 10,30 Power supply means 10a, 10b, 30a, 30b Disconnection detection means 10c, 30c, 30d Short circuit detection means Ry First power supply switching contact Ry1, Ry2 Second Power supply switching contact L1, L2 Power supply line C Common line V System drive power supply

Claims (3)

A fire alarm master unit with a system drive power supply is configured by connecting a plurality of fire alarm slave units in a loop with a power supply line and a common line.
The fire alarm master unit includes power supply means that can selectively supply the drive power of the system to the power supply line from at least one of the upstream side and the downstream side,
The fire alarm system for houses, wherein the power supply means has a configuration in which a disconnection detecting means is provided on the downstream side in order to detect disconnection of the power supply line. A fire alarm master unit having a system drive power source is configured by wiring a plurality of fire alarm slave units across at least two power supply lines excluding the common line.
The fire alarm master unit includes power supply means that can selectively supply system drive power from the two or more power supply lines.
The fire alarm system for houses, wherein the power supply means has a configuration in which either the short-circuit detection means or the disconnection detection means is provided in each of the two or more power supply lines. In claim 1,
The fire alarm master unit and the fire alarm slave unit are configured by loop connection with at least two power supply lines except for the common line.
The power supply means of the fire alarm master unit can selectively supply system drive power to the power supply line from at least one of the upstream side and the downstream side,
The short-circuit detecting means for detecting a short circuit of at least one of the power supply lines is provided on the upstream side, and
A first feed switching contact for selectively feeding system drive power from the upstream side to the two or more feed lines;
A second power supply switching contact for selectively supplying the system drive power from the downstream side to the two or more power supply lines;
A fire alarm system for a house in which the first and second power supply switching contacts are switch-controlled according to the detection operation of the short-circuit detection means and the disconnection detection means.

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