JP4360677B2 - Fire alarm - Google Patents

Description

  The present invention relates to a fire alarm, and more particularly to a method for notifying a result of its function inspection.

A fire alarm for a house detects a physical quantity related to a fire phenomenon, outputs a physical quantity level corresponding to the detected physical quantity, a control circuit that detects a fire based on the physical quantity level, and the control circuit It has a buzzer that outputs alarm sound corresponding to fire detection. Moreover, as a power supply of a fire alarm device, DC voltage is supplied from the internal power supply which consists of batteries, for example (for example, refer patent document 1).
JP 2003-99875 A

  In the past, internal functional inspection of fire alarms, for example, functional inspection of the fire detection unit, was carried out by an artificial operation such as a resident pressing a test button. The number of elderly households is increasing rapidly, and in order to prevent delays in discovering functional abnormalities caused by elderly people who are easy to forget such operations, the function check is automatically performed. It is desired to notify the function check result with, for example, a buzzer sound. At this time, it is conceivable to perform a plurality of internal function checks.In such a case, in addition to notifying the resident of the function abnormality, the importance of the function having the abnormality is notified, and I want to encourage actions such as responding promptly according to importance.

  In addition, there are cases where it is difficult for elderly people to hear the buzzer sound due to deterioration of hearing or disability. In addition, even if there was no hearing loss or obstruction, it was difficult to distinguish buzzer sounds from buzzer sounds of other home appliances. Furthermore, in the buzzer sound, it was difficult to distinguish what it meant unless the sound at the time of fire detection, the sound of abnormal function, etc. were understood in advance.

  The technical problem of the present invention is that, in a fire alarm device that automatically performs an internal function check, informing that the result of the function check is abnormal, in accordance with the importance of the function that is abnormal, The purpose is to provide easy-to-understand information by blinking display.

The present invention detects a physical quantity related to a fire phenomenon and outputs a physical quantity level corresponding to the detected physical quantity, and a control for detecting a fire based on the physical quantity level and automatically performing an internal function check A fire alarm device having a circuit and an acoustic unit that outputs an alarm sound corresponding to a fire detection by the control circuit, and recovering that the result of the function check is abnormal in a fire alarm device to which a power supply voltage is supplied from an internal power source An indicator lamp that continues to blink until it is extinguished by a switch-on operation input , and the control circuit performs a plurality of the function inspections and has a high degree of importance of a function whose result of the function inspection is abnormal. be one that quickly blinking period of the indicator in response to the said as a plurality of functional check, the functional check relating to the fire detection unit, electric in the battery If the level is less than the fire detection portion of the operating voltage the voltage drop determination level is a voltage level higher than, it is determined that the detected power supply voltage reduction abnormality of the internal battery, an internal power supply as a function inspection related to the internal power supply The blinking cycle of the indicator lamp when the function related to the fire detection unit is abnormal is made earlier than the blinking cycle of the indicator lamp when the function related to the internal power supply is abnormal Further, the control circuit turns off the indicator lamp when the result of the function check is normal and no fire is detected, and continuously turns on the indicator lamp when a fire is detected. It is characterized by that.

  In addition, the sound unit is configured by a voice synthesis circuit and a speaker for performing voice output, and the control circuit causes the sound unit to output a voice corresponding to a function whose function check result is abnormal. And

  In the fire alarm device according to the present invention, the control circuit performs a plurality of function checks as an internal function check. Then, the blinking cycle of the indicator lamp is shortened corresponding to the importance of the function whose function check result is abnormal. Therefore, in addition to notifying the resident of the function abnormality, the importance of the function with the abnormality is informed in an easy-to-understand manner by changing the cycle of the blinking display, and promptly responding according to the importance of the abnormal function Can be encouraged. In addition, it is possible to reliably notify an abnormal function to an elderly person who has a hearing loss or a disorder.

  In addition, the control circuit performs a function check for the fire detection unit and the internal power supply as a plurality of function checks, and the blinking cycle of the indicator lamp when the function for the fire detection unit is abnormal, the function for the internal power supply is abnormal. Make it faster than the blinking cycle of the indicator light in some cases. The function check related to the fire detection unit is detection of disconnection of the thermistor, and the function check related to the internal power supply is detection of power supply voltage drop of the internal power supply. Thermistor disconnection abnormality is an abnormality of a highly important function of detecting a fire that is the original purpose of a fire alarm, while the internal power supply voltage drop abnormality is replaced by a new internal power supply. This is a malfunction of a less important function that makes it possible to detect a fire that is the original purpose of a fire alarm. Therefore, not only can the resident be notified of the abnormality of these functions, but also the importance of the function with the abnormality can be notified in an easy-to-understand manner by changing the cycle of the blinking display.

  In addition, the sound unit includes a sound synthesis circuit and a speaker for outputting sound, and the control circuit causes the sound unit to output sound corresponding to a function whose function check result is abnormal. Therefore, even if the resident is an elderly person who has a visual or auditory impairment, the abnormal function can be notified by the other of the visual or auditory sense. In addition, since sound output corresponding to an abnormal function is performed by the acoustic unit, it is difficult to distinguish buzzer sounds from buzzer sounds of other home appliances, etc. Therefore, it is possible to easily notify that the function is abnormal, and it is possible to reliably notify the abnormal function.

  FIG. 1 is a block diagram showing a configuration of a fire alarm device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing an operation of a control circuit in the fire alarm device.

  In FIG. 1, the fire alarm includes an internal battery 1, a power monitoring circuit 2, an indicator lamp circuit 16, a constant voltage circuit 4, a speaker 11, a voice synthesis circuit 15, a control circuit 12, a resistor 9, a recovery switch 8, and a fire detection unit. 5 is provided.

  The internal battery 1 as an internal power source includes various circuits constituting a fire alarm, that is, a power monitoring circuit 2, an indicator lamp circuit 16, a constant voltage circuit 4, a speaker 11, a voice synthesis circuit 15, a control circuit 12, a resistor 9, In order to drive the recovery switch 8 and the fire detection unit 5, for example, a power supply voltage of 6V is supplied.

  The power monitoring circuit 2 monitors the power supply voltage of the internal battery 1 and outputs the voltage level to the control circuit 12.

  The constant voltage circuit 4 is a constant voltage that does not vary depending on the voltage of the internal battery 1 in each circuit from here onward, that is, the speaker 11, the voice synthesis circuit 15, the control circuit 12, the resistor 9, the recovery switch 8, and the fire detection unit 5. (For example, 3V) is supplied.

  The fire detection unit 5 is a thermal fire detection unit including a thermistor 6 and a resistor 7. The fire detection unit 5 detects a physical quantity related to a fire phenomenon and outputs a physical quantity level corresponding to the detected physical quantity to the control circuit 12. Incidentally, there are two types of thermistors 6: a type in which the resistance value increases as the temperature a rises, and a type in which the resistance value decreases as the temperature b increases, but the b type is used here.

  The control circuit 12 controls the entire fire alarm, detects a fire based on the physical quantity level, and automatically performs a function check inside the fire alarm. Regarding the fire detection, the control circuit 12 determines a fire if the physical quantity level from the fire detection unit 5 is equal to or higher than the fire determination level (for example, 2V).

  In addition, regarding the function check inside the fire alarm, the control circuit 12 is called disconnection detection of the thermistor 6 as a function check regarding the fire detection unit 5 and detection of a drop in power supply voltage of the internal battery 1 as a function check regarding the internal battery 1. Perform multiple function checks. Regarding the disconnection detection of the thermistor 6, the control circuit 12 determines that the thermistor 6 is disconnected abnormally if the physical quantity level from the fire detection unit 5 is the disconnection determination level (for example, 0 V). Further, regarding the detection of the power supply voltage drop of the internal battery 1, if the voltage level of the internal battery 1 fetched from the power supply monitoring circuit 2 is equal to or lower than the voltage drop determination level (for example, 5V), it is determined that the power supply voltage drop of the internal battery 1 is abnormal. To do. These fire discrimination level, disconnection discrimination level, and voltage drop discrimination level are stored in the storage unit 13 provided in the control circuit 12 together with an operation program.

  Of the plurality of functions to be inspected, the functional abnormality related to the fire detection unit 5 is more important than the functional abnormality related to the internal battery 1. That is, the disconnection abnormality of the thermistor 6 is an abnormality of a highly important function of detecting a fire that is the original purpose of the fire alarm, whereas the abnormality of the power supply voltage of the internal battery 1 is applied to the new internal battery 1. It is a malfunction of a less important function that it becomes possible to detect a fire that is the original purpose as a fire alarm by replacing. The difference in importance is such that the voltage drop determination level for judging the power supply voltage drop abnormality of the internal battery 1 is set to a voltage level (eg 5 V) higher than the operating voltage (eg 3 V) of the fire detector 6. Even after detecting the power supply voltage drop of the internal battery 1, it can be understood from the fact that the fire detection unit 6 can operate normally during a certain grace period.

  Under the control of the control circuit 12, the indicator lamp circuit 16 displays the result of the function check inside the fire alarm with an indicator lamp (not shown) provided therein. Specifically, when the result of the functional test is normal, the indicator lamp is turned off, and when the result of the functional test is abnormal, the indicator lamp is blinked (flashing). Here, the blinking cycle of the indicator lamp is a fast cycle corresponding to the high importance of the function whose function check result is abnormal. That is, the blinking cycle of the indicator lamp when the function related to the fire detection unit 5 is abnormal (for example, light emission once every 0.5 seconds), and the blinking of the indicator lamp when the function related to the internal power supply 1 is abnormal. By making it faster than the period (for example, light emission once per second), the abnormality of the function having high importance is made to be an early period.

  The voice synthesis circuit 15 outputs a voice as an alarm sound corresponding to the result of the fire detection and the function check inside the fire alarm device from the speaker 11 under the control of the control circuit 12, and the voice synthesis circuit 15 and the speaker 11 is an acoustic part.

  More specifically, the control circuit 12 responds to the sound output command signal LM to the sound output command signal LM to the function that is abnormal in the fire detection and fire alarm based on the result of the fire detection and the function check. Any one of the selection signals L1, L2, and L3 of the various audio phrases is added and output. Here, the selection signal L1 is a signal for selecting the sound corresponding to the fire detection “hue, hugh, hugh, fire. It is a fire.” The selection signal L2 is the function of the thermistor 6 as a function abnormality related to the fire detection unit 5. The audio signal corresponding to the disconnection error “Fire detection unit is abnormal. Replace the fire alarm.” The selection signal L3 is an abnormal function related to the internal battery 1, and the internal battery 1 battery voltage drops abnormally. This signal is used to select the corresponding sound "Internal battery is abnormal. Replace the internal battery."

  The recovery switch 8 to which the current limiting resistor 9 is connected in series is configured such that the ON operation input is taken into the control circuit 12, whereby the control circuit 12 outputs an alarm sound from the speaker 11, And the display output of the indicator lamp of the indicator lamp circuit 16 is restored to the alarm sound output stop and the indicator lamp extinguishing state which are the initial state.

  Next, operation | movement of the control circuit in the fire alarm device of this embodiment is demonstrated based on FIG.

  First, when the power is turned on when the internal battery 1 is set (loaded), the control circuit 12 controls the voice synthesis circuit 15 as an initial setting to stop the voice output from the speaker 11, The indicator lamp circuit 16 is controlled to turn off the indicator lamp (S1).

  Next, the control circuit 12 takes in the physical quantity level from the fire detection unit 5 and compares the physical quantity level with a fire discrimination level (for example, 2 V) in the storage unit 13 to discriminate whether or not a fire has been detected. (S2). If the physical quantity level is less than the fire determination level, it is determined that no fire has been detected (S2), and further, the disconnection level of the thermistor 6 is compared by comparing this physical quantity level with the disconnection determination level (for example, 0V) of the storage unit 13. It is determined whether or not an abnormality has been detected (S3). If the physical quantity level is not the disconnection determination level, it is determined that no disconnection abnormality has been detected (S3), and the control circuit 12 takes in the voltage level of the internal battery 1 output from the power supply monitoring circuit 2, and By comparing the voltage level with the voltage drop determination level (for example, 5 V) of the storage unit 13, it is determined whether or not the power supply voltage drop of the internal battery 1 is detected (S 4). If the voltage level is not less than the voltage drop determination level, it is determined that the power supply voltage drop abnormality of the internal battery 1 has not been detected (S4), and the process returns to step S2. That is, if both of these two function inspection results are normal, the indicator light remains off, and this display informs the resident that the function inspection results inside the fire alarm are normal. be able to.

  If the physical quantity level is equal to or higher than the fire discrimination level, it is determined that a fire has been detected (S2), and the control circuit 12 controls the voice synthesis circuit 15 to generate a voice “Hugh, Hugh, Hugh corresponding to the fire detection. "It is a fire. It is a fire." Is output from the speaker 11 (S5). This sound can notify the resident that a fire has occurred.

  If the physical quantity level is the disconnection determination level, it is determined that a disconnection abnormality has been detected (S3), and the control circuit 12 controls the voice synthesis circuit 15 to generate a voice “fire detection unit that detects the disconnection abnormality detection. “It is abnormal. Replace the fire alarm.” Is output from the speaker 11. Further, the indicator lamp circuit 16 is controlled to blink at a fast cycle such that the indicator lamp emits light once every 0.5 seconds, for example (S6). With this sound and display, it is possible to notify the resident that the highly important function is abnormal, that is, the function related to the fire detection unit 5 is abnormal as a result of the function check inside the fire alarm.

  If the voltage level is less than the voltage drop determination level, it is determined that the power supply voltage drop abnormality of the internal battery 1 has been detected (S4), and the control circuit 12 controls the voice synthesis circuit 15 to reduce the power supply voltage drop. A sound corresponding to the abnormality detection “Internal battery is abnormal. Replace the internal battery.” Is output from the speaker 11. Further, the indicator lamp circuit 16 is controlled to blink at a slow cycle such that the indicator lamp emits light once per second, for example (S7). By this sound and display, it is possible to notify the resident that the function that is not important is abnormal, that is, the function related to the internal battery 1 is abnormal as a result of the function check inside the fire alarm.

  Note that the audio output state and the display output state in steps S5, S6, and S7 are continuously performed until an ON operation input is received from the recovery switch 8 in the control circuit 12, and if there is an ON operation input (S8), The control circuit 12 controls the voice synthesis circuit 15 to stop the voice output from the speaker 11, and controls the indicator lamp circuit 16 to turn off the indicator lamp and restore the initial state ( S9), the process returns to step S2.

  In the fire alarm device according to the present invention, the control circuit performs a plurality of function checks as an internal function check. Then, the blinking cycle of the indicator lamp is shortened corresponding to the importance of the function whose function check result is abnormal. Therefore, in addition to notifying the resident of the function abnormality, the importance of the function with the abnormality is informed in an easy-to-understand manner by changing the cycle of the blinking display, and promptly responding according to the importance of the abnormal function Can be encouraged. In addition, it is possible to reliably notify an abnormal function to an elderly person who has a hearing loss or a disorder.

  In addition, the control circuit performs a function check for the fire detection unit and the internal power supply as a plurality of function checks, and the blinking cycle of the indicator lamp when the function for the fire detection unit is abnormal, the function for the internal power supply is abnormal. Make it faster than the blinking cycle of the indicator light in some cases. The function check related to the fire detection unit is detection of disconnection of the thermistor, and the function check related to the internal power supply is detection of power supply voltage drop of the internal power supply.

  Thermistor disconnection abnormality is an abnormality of a highly important function of detecting a fire that is the original purpose of a fire alarm, while the internal power supply voltage drop abnormality is replaced by a new internal power supply. This is a malfunction of a less important function that makes it possible to detect a fire that is the original purpose of a fire alarm. The difference in importance is that the voltage drop determination level for judging the power supply voltage drop abnormality of the internal power supply is set to a voltage level (eg 5V) higher than the operating voltage (eg 3V) of the fire detection unit. It can also be understood from the fact that the fire detection unit can operate normally during a certain grace period even after detecting a drop in the power supply voltage of the internal power supply. Therefore, not only can the resident be notified of the abnormality of these functions, but also the importance of the function with the abnormality can be notified in an easy-to-understand manner by changing the cycle of the blinking display.

  In addition, the sound unit includes a sound synthesis circuit and a speaker for outputting sound, and the control circuit causes the sound unit to output sound corresponding to a function whose function check result is abnormal. Therefore, even if the resident is an elderly person who has a visual or auditory impairment, the abnormal function can be notified by the other of the visual or auditory sense. In addition, since sound output corresponding to an abnormal function is performed by the acoustic unit, it is difficult to distinguish buzzer sounds from buzzer sounds of other home appliances, etc. Therefore, it is possible to easily notify that the function is abnormal, and it is possible to reliably notify the abnormal function.

  In the present embodiment, the description has been given of the case where only two of the functional inspections related to the fire detection unit and the internal power supply are performed as a plurality of functional inspections. However, the present invention is not limited to this, and other functional inspections may be performed. Of course it is good.

  In addition, although the indicator lamp is exclusively used for displaying the result of the function inspection, it may be displayed in a fire by continuously lighting it when a fire is detected.

It is a block diagram which shows the structure of the fire alarm device which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the control circuit in the fire alarm device which concerns on embodiment.

Explanation of symbols

1 Internal battery (internal power supply)
2 Power monitoring circuit 5 Fire detection unit 11 Speaker 12 Control circuit 13 Storage unit 15 Speech synthesis circuit 16 Indicator lamp circuit

Claims (2)

A fire detection unit that detects a physical quantity related to a fire phenomenon and outputs a physical quantity level corresponding to the detected physical quantity; a control circuit that detects a fire based on the physical quantity level and automatically checks an internal function; and In a fire alarm with an acoustic part that outputs an alarm sound corresponding to fire detection by the control circuit, and the power supply voltage is supplied from the internal power supply,
It is provided with an indicator lamp that blinks continuously until the result of the function check is abnormal until it is turned off by an ON operation input of a recovery switch ,
The control circuit performs a plurality of the function checks, and accelerates the blinking cycle of the indicator lamp in response to a high degree of importance of a function whose result of the function check is abnormal, As a plurality of function checks, if the function check on the fire detection unit and the voltage level of the internal battery is less than the voltage drop determination level that is higher than the operating voltage of the fire detection unit, the power supply voltage of the internal battery It is determined that a drop abnormality has been detected, and the power supply voltage drop of the internal power supply is detected as a function check related to the internal power supply, and the blinking cycle of the indicator lamp when the function related to the fire detection unit is abnormal is It is faster than the blinking cycle of the indicator lamp when the function related to the power supply is abnormal.
Further, the control circuit is characterized in that when the result of the function check is normal and a fire is not detected, the indicator lamp is turned off, and when a fire is detected, the indicator lamp is continuously turned on. Fire alarm.
The sound unit is composed of a voice synthesis circuit and a speaker for performing voice output,
The fire alarm according to claim 1, wherein the control circuit causes the sound unit to output a sound corresponding to a function whose function check result is abnormal.

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