JP4831007B2 - Battery fire alarm - Google Patents

Description

  The present invention relates to a battery-type fire alarm used in a house, and more particularly, in a cold region, even when the electromotive force due to the battery power is reduced, the battery power is activated when a fire is detected. The present invention relates to a battery-type fire alarm that can restore electromotive force.

  Recently, it is operated by a battery power source, and at least one of temperature and smoke density is monitored, and when either temperature or smoke density reaches a preset threshold value, a battery type that performs alarm processing Fire alarms are widely used in apartment houses and detached houses. In particular, in the 2006 revision of the Fire Service Act, it is obliged to install a battery-type fire alarm of this type or a fire alarm driven by an AC 100V power source in newly built houses.

  This type of battery-powered fire alarm is activated by an electromotive force generated by a battery power source such as a manganese dry battery, an alkaline dry battery, or a lithium dry battery, and monitors at least one of temperature and smoke concentration. When reaching the value, alarm processing such as outputting an alarm sound or outputting an alarm message is performed.

Patent Document 1 discloses an example of this type of battery-type fire alarm, which is operated by a battery power source and constantly monitors the smoke concentration. When the smoke concentration reaches a threshold value, at least an alarm sound is issued. Instead, a predetermined voice message and buzzer sound are output.
JP 2005-208807 A

  By the way, normally, this type of battery-type fire alarm is assumed to be used in an environment where the ambient temperature is 0 to 40 degrees, but when used in a cold environment where the ambient temperature is less than 0 degrees. In the battery power source, the internal resistance increases as the ambient temperature decreases, and the generated electromotive force tends to decrease accordingly.

  Therefore, when this type of battery-type fire alarm is used in a cold region, either the temperature or smoke density reaches the threshold value, and the battery power supply outputs an alarm sound even when a fire is detected. Therefore, there is a possibility that a necessary electromotive force cannot be generated, an alarm sound for that purpose cannot be output, and a problem that a sufficient volume cannot be output even if the alarm sound is output.

  The present invention has been proposed in consideration of the above circumstances, and in a cold region, even when the electromotive force generated by the battery power supply is reduced, the battery power supply is activated to detect the electromotive force when a fire is detected. The object is to provide a battery fire alarm that can be recovered.

In order to achieve the above object, in the present invention , at least a temperature in a battery-type fire alarm that performs both a process for monitoring a fire factor and a process for alarming when a fire occurs by a power source supplied from a battery power source. Monitoring any one of the smoke concentrations, and when either the temperature or the smoke concentration reaches a preset threshold value, a fire detection means for outputting a fire detection signal; and the fire detection means When a detection signal is output, an alarm processing means for performing an alarm process, a control means, a power supply terminal serving as a positive electrode, and a power supply terminal serving as a negative electrode are provided, and through power supply lines derived from both power supply terminals, At least a battery power supply for supplying driving power to each of the fire detection means, the alarm processing means, and the control means, and a bypass connection to the power supply line. Battery power activation means for activating the battery power supply by short-circuiting both power supply terminals of the battery power supply, and the control means at least the temperature, smoke concentration by the fire detection means The battery power activation means is prohibited during non-fire monitoring, while the battery power activation means is activated when a fire occurs when the fire detection signal is output by the fire detection means. Then, the battery power source is activated, and then the alarm processing means is operated to perform alarm processing.

Here, as the alarm processing performed by the alarm processing means, for example, an alarm message such as “view, view, fire, fire”, a buzzer sound such as “boo”, or an alarm message is displayed, Processing such as turning on and blinking the warning light can be considered.
The battery power source of the present invention is not limited as long as it is used as a power source for battery-type fire alarms such as manganese dry batteries and alkaline dry batteries. Those that can be short-circuited in a safe state are desirable.

  In the battery-type fire alarm device according to claim 2, the battery power source activation means is provided close to the battery power source or in contact with the battery power source, and is energized by the battery power source. It is characterized by comprising at least a resistance element that generates heat.

  Here, the resistance element may be any element that can sufficiently and safely heat the battery power supply when energized. For example, a resistor having a resistance value of 1 to 3Ω can be used.

  The battery-type fire alarm device according to claim 3, further comprising voltage measuring means for measuring a voltage value between terminals of both power supply terminals of the battery power supply, wherein the control means is configured to perform the fire by the fire detecting means. When the detection signal is output, the voltage value between the terminals measured by the voltage measuring unit is determined. When the voltage is equal to or less than a preset threshold value, the battery power source activating unit is activated to After the power source is activated, the alarm processing means is operated to perform alarm processing.

  According to the battery-type fire alarm device of claim 1, at least one of temperature and smoke density is monitored, and when either temperature or smoke density reaches a preset threshold value, fire detection is performed. A fire detection means for outputting a signal, an alarm processing means for performing an alarm process when a fire detection signal is output by the fire detection means, a control means, a power supply terminal for a positive electrode, and a power supply terminal for a negative electrode. Battery power supply for supplying drive power to at least each of the fire detection means, alarm processing means, and control means through a power supply line derived from both power terminals, and is bypass-connected to the power supply line. Battery power activation means for activating the battery power supply by short-circuiting both power supply terminals of the battery power supply, and the control means outputs a fire detection signal by the fire detection means. When the, after activating the battery power by operating the battery power supply activation means to perform the alarm processing by operating the alarm processing means.

  Therefore, when either the temperature or the smoke density reaches a preset threshold value, a fire detection signal is output by the fire detection means, so the control means operates the battery power supply activation means to After the two power supply terminals are short-circuited and activated, the alarm processing means is activated to perform alarm processing.

  Therefore, in a cold region, even if the electromotive force generated by the battery power supply is reduced due to an increase in the internal resistance of the battery power supply, the battery power supply is activated and the electromotive force is restored when a fire is detected. Since a battery-powered fire alarm device capable of performing alarm processing can be provided, problems such as misreporting at the time of fire detection and a decrease in the volume of fire alarm output can be solved.

  According to the battery type fire alarm device according to claim 2, the battery power source activation means is provided close to or in contact with the battery power source, and is energized by the battery power source to generate heat. The at least resistive element is provided.

  Therefore, in the battery power source activation means, the resistance element is energized and self-heats, and the heat generated by the self-heating is transmitted to the battery power source that is close to or in contact with the resistance element. In addition to the effect of being activated by short-circuiting between both power supply terminals, heat due to self-heating of the resistance element is transmitted, the activation of the battery power supply becomes more prominent, and the battery power supply is recovered quickly.

  According to the battery-type fire alarm device according to claim 3, the battery-powered fire alarm device further includes voltage measuring means for measuring a voltage value between both power terminals of the battery power supply, and the control means detects the fire detection signal by the fire detecting means. Is output, the voltage value between the terminals measured by the voltage measuring means is determined, and if it is below a preset threshold value, the battery power activation means is activated to activate the battery power supply. Later, the alarm processing means is operated to perform alarm processing.

  Therefore, only when the voltage value between the terminals of the battery power supply terminals is equal to or less than a preset threshold value, the battery power activation means is activated to activate the battery power supply by short-circuiting the power supply terminals. Therefore, since the battery power source can be activated only when it is necessary to activate the battery power source, wasteful power consumption of the battery power source that occurs when the power source terminals of the battery power source are short-circuited can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an example of a main part configuration of a battery-type fire alarm device of the present invention, and FIG. 2 is a diagram showing an example of a main part configuration of a battery power supply activation circuit.

  As shown in FIG. 1, the battery fire alarm 1 of the present invention constitutes a control means, a control circuit 10 that controls the following components, a fire detection means, and either temperature or smoke concentration. An alarm that performs monitoring and constitutes a fire detection circuit 11 and an alarm processing means for outputting a fire detection signal when a preset threshold value is reached, and performs an alarm process when the fire detection circuit 11 outputs a fire detection signal The circuit 12 includes a battery power activation circuit 13 constituting a battery power activation means, a battery 14A composed of a dry battery such as a manganese dry battery, an alkaline dry battery, or a lithium dry battery, and is connected to a battery type through power terminals T1 and T2. The battery power supply 14 that supplies drive power (for example, 3V power) to each component of the fire alarm 1, and the potential difference between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 is measured. And by, and a battery power supply voltage measuring circuit 15 for measuring the inter-terminal voltage between the power supply terminal T1 and the power supply terminal T2 of the battery power source 14.

  In the battery fire alarm 1 having such a configuration, the control circuit 10 includes a battery power activation circuit activation threshold 10A (for example, 2.7 V), a battery power activation circuit activation timer 10B, and an alarm circuit deactivation timer 10C. ing. Detailed descriptions thereof will be described later.

  The fire detection circuit 11 monitors either temperature or smoke density, and is configured to output a fire detection signal when a preset threshold value is reached. However, the present invention is not limited to this example, and the fire detection circuit 11 Is output to the control circuit 10 as an analog value to the temperature or smoke density monitored by the control circuit 10, and when the analog value output from the fire detection circuit 11 reaches a preset threshold value, It may be programmed to detect a fire.

  The alarm processing performed by the alarm circuit 12 is performed by the built-in speaker, for example, an alarm message such as “view, view, fire, or fire”, a buzzer sound such as “boo”, or an alarm message displayed. Or to turn on or blink the warning light.

The battery power supply 14 is provided with a power supply terminal T1 serving as a positive electrode and a power supply terminal T2 serving as a negative electrode, and at least a fire detection circuit 11 and an alarm circuit 12 through a power supply line L1 derived from both power supply terminals T1 and T2. , A drive power supply for operating each of the control circuits 10 is supplied.
In the battery power supply 14, in this embodiment, two dry batteries (battery 14A) that generate an electromotive force of 1.5V are connected in series, and a DC3V drive power supply is connected to each of the power supply terminals T1 and T2 through the power supply terminals T1 and T2. The components are supplied.

  As described above, the battery power supply voltage measurement circuit 15 measures the inter-terminal voltage value between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 and outputs the measurement value to the control circuit 10. Yes. The control circuit 10 receives the inter-terminal voltage value between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 output from the battery power supply voltage measurement circuit 15, and performs a battery exhaustion notification process of the battery power supply 14 to be described later. Battery power activation processing is performed.

  Here, the battery power outage notifying process of the battery power source 14 outputs a voice message for notifying the user of battery exhaustion from a built-in speaker (not shown), or a battery running out by a built-in display means (not shown). It is conceivable to display a message for informing the user, or to turn on and blink an indicator lamp (not shown).

  As shown in FIG. 1, the battery power supply activation circuit 13 is bypass-connected to the power supply line L1 derived from the power supply terminals T1 and T2 using a lead L2, and the power supply terminal T1 of the battery power supply 14 is connected. , T2 are short-circuited, and a current having a large current value is caused to flow between the power supply terminal T1 and the power supply terminal T2, thereby causing the battery power supply 14 to generate heat and reducing the resistance value of the internal resistance Rx of the battery power supply 14. Thereby, the battery power supply 14 can be activated. Here, when the battery power supply 14 uses a resistance element R having a resistance value of 1 to 3Ω as described later, the terminals between the power supply terminals T1 and T2 of the battery power supply 14 are short-circuited for 20 seconds. And about 10 degrees. When the surface temperature of the battery power supply 14 is warmed to a temperature within the range of 0 degrees to 40 degrees, the battery power supply 14 is activated and the electromotive force is restored.

  As shown in FIG. 2, the battery power supply activation circuit 13 having such a configuration is provided on the circuit board 16 in the vicinity of the battery power supply 14 and is energized by the battery power supply 14 to generate heat. Is at least provided.

  The resistance element R is composed of a resistor having a very small resistance value (for example, 1 to 3Ω) in order to short-circuit the terminals between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14. The switching means SW that is opened and closed under the control of the control circuit 10 is connected in series.

  When the switching means SW is controlled to be closed, the terminals between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 are short-circuited, and the current value is large between the power supply terminals T1 and T2 through the conductor L2. Since the current flows, the surface temperature of the battery power source 14 increases, and accordingly, the resistance value of the internal resistance Rx decreases, the battery power source 14 is activated, and the electromotive force is restored.

  In the battery power supply activation circuit 13, since a current having a large current value flows through the resistance element R, the resistance element R self-heats, and heat generated by the heat generation is provided close to the resistance element R. Is transmitted to the surface of the battery power supply 14, and the activation of the battery power supply 14 becomes more remarkable.

  The battery power supply activation circuit 13 is configured by connecting a resistance element R having a very small resistance value and the switching means SW in series, but the present invention is not limited to this example, and the switching means SW may be bypass-connected to the power supply line L1 led out from both power supply terminals T1 and T2 through the conducting wire L2.

  Even in such a case, the conducting wire L2 itself provided for bypass-connecting the switching means SW to the power supply line L1 has a very small resistance value. Therefore, when the switching means SW is controlled to be closed, the conducting wire L2 As a result, the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 are short-circuited, so that the same effect as described above can be obtained.

  The resistance element R is provided close to the battery power supply 14, but is not limited to this example, and even when provided in contact with the battery power supply 14, the same effect as described above can be obtained. Can do.

  FIG. 3 is a schematic perspective view of the battery fire alarm of the present invention. This battery-type fire alarm 1 is a smoke alarm that outputs at least an alarm sound when the smoke concentration reaches a threshold value. The base plate A, base plate A on a disk attached to a ceiling surface or an inner wall surface of a house or the like. And a head portion C which is attached to the base portion B and constitutes a smoke sensing chamber.

  On the base plate A, the circuit board 16 on which the above-described components 10 to 15 are disposed is fixed. The surface portion B1 of the base portion B is provided with a push button C3 and a pull string C4 for performing an alarm stop instruction operation described later. The push button C3 and the pull string C4 are components of an operation circuit (not shown). It has become a part of.

  The head part C is a cylindrical body having a bottom on the indoor space side, and a smoke inlet C1 for taking in smoke is provided on the side peripheral surface thereof. The head part C has a built-in speaker for outputting an alarm sound, and a sound hole C2 is provided at the bottom of the head part C.

  FIG. 4 is a time chart for explaining an example of the basic operation of the battery fire alarm of the present invention.

  When the fire detection signal is output from the fire detection circuit 11 (a), the control circuit 10 (b) operates the battery power supply activation circuit 13 for a preset time (for example, 20 seconds) to perform switching. When the means SW is closed and controlled, the terminals between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 are short-circuited, and when the preset time (here 20 seconds) is reached, the switching means SW is turned on. Open control is performed to stop the short circuit between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14.

(C) The surface temperature of the battery power supply 14 increases when the terminals between the power supply terminal T1 and the power supply terminal T2 are short-circuited for a preset time (here, 20 seconds). Accordingly, (d) the resistance value of the internal resistance Rx of the battery power supply 14 is reduced.
(E) The control circuit 10 operates the alarm circuit 12 and outputs an alarm sound after short-circuiting between the terminals between the power supply terminal T1 and the power supply terminal T2 for a preset time.

  Since the battery-type fire alarm of the present invention can perform the basic operation described above, the electromotive force generated by the battery power source Rx is reduced by increasing the internal resistance Rx of the battery power source 14 in a cold region. Even in such a state, at the time of detecting a fire, at least an alarm sound can be output after the battery power source 14 is activated and the electromotive force is restored.

  FIG. 5 is a flowchart showing the above basic operation in detail (100 to 113). When the fire detection signal is output from the fire detection circuit 11 (100), the control circuit 10 activates the battery power activation circuit operation timer 10B and measures a preset time (here, 20 seconds) ( 101).

  Then, the control circuit 10 starts the operation of the battery power supply activation circuit 13, and between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 until reaching a preset time (here, 20 seconds). The terminals are short-circuited (102).

  When the preset time (here, 20 seconds) is reached, the operation of the battery power activation circuit 13 is stopped and the battery power activation circuit operation timer 10B is reset (104, 105). Then, the control circuit 10 starts the operation of the alarm circuit 12 (106).

  Next, when the push button C3 is pressed or the drawstring C4 is pulled (107), the control circuit 10 starts the alarm circuit deactivation timer 10C and measures a preset time (for example, 5 minutes). (108). Then, the control circuit 10 interrupts the operation of the alarm circuit 12 (109).

  When the preset time (here, 5 minutes) is reached, the control circuit 10 resets the alarm circuit deactivation timer 10C (110, 111) and performs the process of step 100.

  On the other hand, when the fire detection signal is not received from the fire detection circuit 11 (100), the control circuit 10 stops the operation when the alarm circuit 12 is operated, and operates the alarm circuit 12. Stop (112, 113).

  That is, according to the above-described flowchart, the battery-type fire alarm device 1 causes the battery power activation circuit 13 to remain in the preset time period (while the fire detection circuit 11 continuously outputs the fire detection signal ( The process of starting the alarm circuit 12 after activating the battery power supply 14 for 20 seconds here is repeated until the fire detection circuit 11 stops outputting the fire detection signal. .

  Even when the fire detection circuit 11 outputs a fire detection signal and the alarm circuit 12 is activated, when the push button C3 is pushed or the drawstring C4 is pulled, a preset time (here) In 5 minutes), the operation of the alarm circuit 12 is interrupted.

  FIG. 6 is a flowchart showing another example of the basic operation of the battery fire alarm of the present invention (200 to 215). Since this flowchart is the same as the flowchart of FIG. 5 described above except for the processing of steps 201 and 202, the description thereof will be omitted.

  In this type of battery fire alarm 1, when the fire detection signal is output from the fire detection circuit 11, the control means 10 refers to the measurement value by the battery power supply voltage measurement circuit 15 (201), and the measurement value is The battery power activation circuit 13 is operated for a preset time only when it is less than or equal to the preset battery power activation circuit operation threshold 10A (in this case, 2.7V) (202). Is programmed.

  Therefore, according to this type of battery-type fire alarm device 1, the above-described effects can be obtained, and the voltage value between the power terminals T1 and T2 of the battery power supply 14 is set to the battery power activation circuit operation threshold 10A ( In this case, the battery power supply activation circuit 13 is activated only when the voltage is less than or equal to 2.7 V), and the terminals between the power supply terminal T1 and the power supply terminal T2 of the battery power supply 14 are short-circuited and activated. Since the battery power supply 14 can be activated only when it is necessary to activate the battery power supply 14, the waste of power consumption of the battery power supply 14 that occurs when the power supply terminals T1 and T2 of the battery power supply 14 are short-circuited. Can be suppressed.

  The battery-type fire alarm 1 having such a configuration is connected to another battery-type fire alarm 1 through a transmission line, and is transmitted when the fire detection circuit 11 outputs a fire detection signal. The function of sending an interlocking signal to another battery type fire alarm device 1 through the line, and when the interlocking signal is sent from another battery type fire alarm device 1 through the transmission line, the alarm circuit 12 is activated to operate the interlocking alarm. It is also possible to adopt a linked alarm type configuration having a function for performing processing.

  When such a linked alarm type battery-type fire alarm device 1 receives a linked signal through the transmission line, the linked alarm processing is started after the activation process of the battery power source 14 as described above, or When the interlock signal is received through the transmission line, only when the voltage value between the power supply terminals T1 and T2 of the battery power supply 14 is equal to or less than the battery power supply activation circuit operation threshold 10A (here, 2.7 V), Thus, after the battery power supply activation circuit 13 is operated and the battery power supply 14 is activated, the interlocking alarm process is started. The battery-type fire alarm device 1 having such a configuration can also achieve the effects described above.

The block diagram which shows an example of the principal part structure of the battery-type fire alarm of this invention The figure which shows an example of the principal part structure of a battery power supply activation circuit Schematic perspective view of the battery fire alarm of the present invention Time chart for explaining an example of basic operation of the battery type fire alarm of the present invention Flowchart showing the basic operation shown in FIG. 4 in detail The flowchart which showed other examples of basic operation of the battery type fire alarm of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery type fire alarm 10 Control circuit 10A Battery power activation circuit operation threshold 10B Battery power activation circuit operation timer 10C Alarm circuit operation stop timer 11 Fire detection circuit 12 Alarm circuit 13 Battery power activation circuit 14 Battery power supply 15 Battery power supply Voltage measuring circuit L1 Power supply line L2 Conductor R Resistance elements T1, T2 Power supply terminal SW Switching means

Claims (3)

In battery-powered fire alarms that perform both the process of monitoring fire factors and the alarm process in the event of a fire, using the power supplied from the battery power supply,
At least one of temperature and smoke density is monitored, and when either the temperature or smoke density reaches a preset threshold value, a fire detection means for outputting a fire detection signal;
When the fire detection signal is output by the fire detection means, alarm processing means for performing alarm processing;
Control means;
A power supply terminal serving as a positive electrode, a power supply terminal serving as a negative electrode are provided, and through the power supply lines derived from both power supply terminals, at least for each of the fire detection means, the alarm processing means, and the control means, Battery power supply for supplying drive power;
A battery power supply activation means that is bypass-connected to the power supply line, and short-circuits between both power supply terminals of the battery power supply to activate the battery power supply,
The control means prohibits the operation of the battery power source activation means during a non-fire period in which at least one of temperature and smoke density is monitored by the fire detection means, while the fire detection signal is generated by the fire detection means. In the event of an output fire, the battery power activation means is activated to activate the battery power supply, and then the alarm processing means is activated to perform alarm processing. vessel. In claim 1,
The battery power source activation means is provided in the vicinity of the battery power source or in contact with the battery power source, and includes at least a resistance element that is energized by the battery power source and generates heat. A battery-powered fire alarm. In claim 1 or claim 2,
Voltage measuring means for measuring a voltage value between terminals of both power supply terminals of the battery power supply is further provided;
The control means determines the inter-terminal voltage value measured by the voltage measurement means when the fire detection signal is output by the fire detection means, and if the value is equal to or less than a preset threshold value, A battery-type fire alarm, wherein the battery power source activation means is activated to activate the battery power source, and then the alarm processing means is activated to perform alarm processing.

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