JP2003058961A - Fire sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To periodically perform automatic inspection in a fire detector, to store its result and to immediately issue a warning of the result when an inspection button is depressed. SOLUTION: The fire detector is constituted such that a pseudo sensor output test means periodically outputs pseudo sensor output equal to or more than a reference value which is stored in a reference value storage means, whether or not the pseudo sensor output which is outputted by the pseudo sensor output test means is equal to or more than the reference value is found by a comparison means, a fire discrimination signal is stored in a storage means when the pseudo sensor output is equal to or more than the reference value and discriminated as fire, or an abnormality discrimination signal is stored in the storage means when the pseudo sensor output is equal to or less than the reference value and discriminated as abnormality, the fire discrimination signal is outputted to a warning means when the fire discrimination signal is stored in the storage means and the abnormality discrimination signal is outputted to the warning means when the abnormality discrimination signal is stored in an inspection monitoring means in the case of receiving an inspection instruction from the inspection button.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fire detector in a fire alarm system.

[0002]

2. Description of the Related Art Conventionally, there is a fire detector for a house installed in a room such as a detached house. There is a photoelectric type of this fire detector, in which case the light emitting element lights up in a cycle of several seconds,
The light receiving element receives the scattered light due to smoke. Then, based on the light emitting pulse of the light emitting element, when a light receiving pulse of a predetermined amount or more is continuously obtained three times by the light receiving element, it is judged as a fire. Further, this fire detector is equipped with a push button for inspection, and the fire detector can be inspected by pushing this push button.
That is, while the push button is being pressed, a light receiving pulse of a predetermined amount or more is output, and a state similar to that at the time of fire is artificially created. Japanese Utility Model Laid-Open No. 57-99289 discloses a conventional fire detector having such a push button for inspection. In this fire detector, when the push button for inspection is pressed for inspection, it is judged that a fire occurs when the light receiving pulse of a few seconds cycle is three times or more in succession.
It is necessary to keep the button pressed for about 0 seconds. After that, if the function is normal, the buzzer sounds and the indicator light is turned on.

[0003]

In the conventional fire detector as described above, when pressing the inspection push button for inspection, it is necessary to keep the push button pressed for about 10 seconds. Takes a long time, and there are no indications or alarms while the push button is being pressed, so the person inspecting may feel uncertain that the button operation is wrong, or There was a problem that it was mistakenly determined to be a failure.

The present invention has been made in order to solve such a problem, and an automatic inspection is periodically carried out in the fire detector, the result is stored, and when the inspection button is pressed. , The purpose is to obtain a fire detector that can alert the result immediately.

[0005]

A fire detector according to the present invention detects a physical quantity of a fire phenomenon and outputs a sensor output according to the physical quantity, and a value of the sensor output at the time of fire. Reference value storage means for storing as a reference value, comparison means for comparing the sensor output output from the fire detection means with the reference value, and the comparison means discriminates a fire when the sensor output is greater than or equal to the reference value. In a fire detector equipped with an alarm means for issuing a fire display alarm based on a fire discrimination signal, a pseudo sensor output test means for periodically outputting a pseudo sensor output, and the comparing means with a pseudo sensor output and a reference value. To set the state of the automatic inspection abnormality flag and store the state of the automatic inspection abnormality flag, an inspection button for outputting an inspection command, and an inspection command for the inspection button. Automatic inspection abnormality flag of the storage means is constituted by a check monitoring means for outputting a fire discriminating signal to the alarm means when it is cleared if.

According to the present invention, the pseudo sensor output testing means periodically outputs the pseudo sensor output, and the comparing means compares whether the pseudo sensor output is the reference value or more. When the pseudo sensor output is the reference value or more, Clears the state of the automatic inspection abnormality flag, and sets the automatic inspection abnormality flag when the pseudo sensor output is judged to be abnormal below the reference value and stores it in the storage means. When an inspection command is received from the button, a fire determination signal is output to the alarm means when the automatic inspection abnormality flag in the storage means is stored in the clear state, so when the inspection button is operated, the automatic inspection process Based on the result, the alarm means immediately gives an alarm indicating the fire, so that the inspector does not need to worry.

[0007]

1 is a block diagram showing a configuration of a fire detector according to an embodiment of the present invention, FIG. 2 is a flowchart showing a fire monitoring process of the fire detector, and FIG. 3 is a fire detector. 4 is a flowchart showing an inspection button monitoring process of the fire detector, FIG. 5 is a time chart showing an inspection button monitoring process of the fire detector, and FIG. 6 is a fire of the fire detector. It is explanatory drawing which shows the display condition of a light and a power supply lamp, and the operating condition of a buzzer. In the figure, 10 is a microcomputer,
It controls the entire fire detector 1. 20 is RO
In M, a fire level, which is a threshold value for fire discrimination, a test passing level, a predetermined program, and the like are stored. Reference numeral 21 denotes a RAM as a work area, which is an area for temporarily storing the sensor output.

Reference numeral 30 denotes a light emitting circuit, which supplies a current pulse for light emission to the light emitting element 31 when receiving a light emission control pulse from the microcomputer 10. Reference numeral 40 denotes an amplifier circuit which amplifies the received light output of the scattered light of the light receiving element 41 with a predetermined amplification factor. Reference numeral 42 is a gain adjustment circuit that changes the amplification factor of the amplification circuit 40 according to a command from the microcomputer 10. 60 is a constant voltage circuit, and AC-D from the power plug 62
A circuit for supplying the voltage supplied to the C conversion unit 61 into a constant voltage necessary for the microcomputer 10 and the like, 63 is a constant voltage circuit 60
Is a voltage monitoring circuit that monitors the voltage output by the device and outputs a voltage abnormality signal to the microcomputer 10 when the voltage is below a predetermined voltage.

Reference numeral 70 denotes a lighting control circuit as an alarm means,
In a normal state, the power lamp 71 is turned on, the fire lamp 72 is turned off, the fire lamp 72 is turned on and off when a fire occurs, the power lamp 71 is turned off, and when there is an abnormality such as an automatic inspection abnormality, the power lamp 71 is turned on and off, and a fire lamp is turned on. 72 is turned off. Both the power lamp 71 and the fire lamp 72 are provided at positions visible from the outside of the main body of the fire detector 1. In addition, these power lamps 71
Also, the light emission form of the fire lamp 72 can be freely changed if the normal state, the fire state, and the abnormal state are identified. Reference numeral 73 is a buzzer that sounds at the time of fire, 74 is a sounding circuit that sounds the buzzer 73 at the time of a fire by a signal from the microcomputer 10, 75 is an inspection button that outputs an inspection command to confirm the operation test of the fire detector, and 76 is an inspection The timer measures the time when the button 75 is turned on and the inspection command is output.

In this embodiment, the light emitting circuit 30,
The light emitting element 31, the amplification circuit 40, and the light receiving element 41 are an example of a fire detection unit that detects a physical quantity of a fire phenomenon and outputs a sensor output according to the physical quantity. Also, ROM2
0 is an example of a reference value storage unit that stores the value of the sensor output at the time of a fire as a reference value (fire level). The microcomputer 10 stores the sensor output output from the fire detection unit and the reference value storage unit. When receiving the inspection command from the comparison means for comparing with the reference value and the inspection button 75, the automatic inspection abnormality flag stored in the RAM 21 which is the storage means is looked at, and the state of the stored automatic inspection abnormality flag is set. It is an example of an inspection and monitoring unit that outputs a fire determination signal to an alarm unit based on the above.

Next, the operation of the fire detector according to the embodiment of the present invention will be described. In the power supply lamp 71 and the fire lamp 72 according to the embodiment of the present invention, the light emission form changes depending on the state of sensor output and the like. Therefore, the embodiment will be described by dividing it into four cases as shown below. Note that, in the normal state, only the power supply lamp 71 is on. First, steps 1 to n in the following flowchart will be referred to as S1 to Sn, with the following steps omitted. (1) A normal fire monitoring process will be described based on the flowcharts of FIGS. 1 and 2. First, when the initial setting is performed and the fire monitoring process is started (S1), the microcomputer 10
Outputs a light emission control pulse to the light emitting circuit 30 to cause the light emitting element 31 to emit light in a cycle of 3 seconds. At this time, the light receiving element 41
The received light output of is amplified by the amplifying circuit 40, and the amplifier gain of the amplifying circuit 40 is set to be low as a normal one by the gain adjusting circuit 42 (S2).

The light receiving output (sensor output) of the light receiving element 41 amplified by the amplifier circuit 40 is taken into the microcomputer 10,
It is stored in the RAM 21. ROM20 in the microcomputer 10
The fire level, which is the threshold value for fire determination stored in, is read and the sensor output stored in the RAM 21 is compared with the fire level (S3). Here, if the sensor output is equal to or more than twice the fire level in the pulse of the cycle of 3 seconds, the microcomputer 10 determines that there is a fire, outputs a fire determination signal to the lighting control circuit 70, and controls the lighting. The circuit 70 blinks and lights the red fire lamp 72 based on the fire discrimination signal, turns off the green power lamp 71, the microcomputer 10 outputs a ringing signal to the ringing circuit 74, and the ringing circuit 74 rings the buzzer 73. Fires an alarm with a fire display that causes it (Fig. 6
reference). If the sensor output does not exceed the fire level twice in succession, the microcomputer 10 determines that it is normal (not a fire), outputs a normality determination signal to the lighting control circuit 70, and confirms that it is in a normal state. Maintain the normal display shown.
That is, the lighting control circuit 70 turns off the red fire lamp 72 and turns on the green power lamp 71 based on the normality determination signal, and the microcomputer 10 does not output the ringing signal to the ringing circuit 74.
The ringing circuit 74 gives a normal indication that the buzzer 73 will not ring (see FIG. 6). When the processing for discriminating the fire or the normal is finished in this way, the fire monitoring processing is finished (S
4).

(2) Automatic inspection process FIGS. 1 and 3
A description will be given based on the flowchart. Here, the automatic inspection process is a process of automatically inspecting whether or not the fire detector is normally operating so as to detect a fire. Specifically, the amplifier gain of the sensor output is set to a high value by the gain adjustment circuit 42, for example, at eight light emission cycles. That is, the automatic inspection process is automatically performed every 24 seconds during the above-described fire monitoring process. When the automatic inspection process is started (S11), the gain adjustment circuit 42 receives the test inspection signal from the microcomputer 10 and sets the amplifier gain of the amplifier circuit 40 higher than the normal one every 24 seconds (S12). This is so that the value of the sensor output will be artificially the same as in a fire. In this way, the gain adjustment circuit 42
Is the pseudo sensor output test means.

The light-receiving output of the light-receiving element 41 (hereinafter referred to as a pseudo sensor output) amplified by the amplifier circuit 40 with a high gain every 24 seconds is taken into the microcomputer 10 and stored in the RAM.
21 is stored. The microcomputer 10 reads the test pass level, which is the reference value for test discrimination, stored in the ROM 20, and compares the pseudo sensor output stored in the RAM 21 with the test pass level (S13). Here, if the pseudo sensor output is at or above the test passing level, the microcomputer 10 determines that the fire detection means is normal, and sets the automatic inspection abnormality flag as a test result to "clear" (S1).
4) The state is stored in the RAM 21. When the automatic inspection is normal, the normal display state in which only the green power lamp 71 is lit is maintained. Further, the automatic inspection may be determined to be normal when the comparison performed every 24 seconds is the pass level twice consecutively.

If the pseudo sensor output is below the test passing level, the microcomputer 10 determines that the fire detecting means is abnormal, sets the automatic inspection abnormality flag to "set" (S15), and sets the state. It is stored in the RAM 21. Then, an abnormality determination signal is output to the lighting control circuit 70, the lighting control circuit 70 immediately turns on and off the power supply lamp 71 based on the abnormality determination signal, the fire lamp 72 is turned off, and the microcomputer 10 causes the ringing circuit 74 to ring. Ringing circuit 7 without outputting a signal
No. 4 gives an abnormal display that the buzzer 73 is not activated (see FIG. 6). When the process of determining whether or not the automatic inspection is normally performed is completed in this way, the automatic inspection process ends (S16). In this way, in the automatic inspection process, if the inspection result is abnormal and the automatic inspection abnormality flag is set, the power supply lamp 71 is immediately blinked, so that the person in the dwelling unit can immediately notice the abnormality in the sensor. If the inspection result is normal and the automatic inspection error flag is cleared, the RAM is updated every 24 seconds.
The state of “clear” is updated and stored in 21 at any time,
The state of "normal display" is continued until the inspection button 75 is pressed.

(3) Check button monitoring process FIG.
Description will be made based on the flowchart of FIG. 4 and the time chart of FIG. First, the two functions of the check button 75 will be described. If the check button 75 is pressed during normal operation,
It has a function of outputting the result of the automatic inspection process to the alarm means. Further, it has a function of stopping the buzzer 73 and stopping the re-ringing of the buzzer for 5 minutes when the buzzer 73 is pressed during a fire that is ringing. Here, the inspection button monitoring process is a process in which an inspector confirms whether or not the fire detector is operating normally to detect a fire and the operation of the inspection button itself. 2 during the fire monitoring process as described above
The automatic inspection process is automatically performed every 4 seconds, and the result of whether or not the automatic inspection is normally performed can be known from the display status of the fire lamp 72 and the power lamp 71.
5 I cannot know the abnormality of my own. Therefore,
Inspection button monitoring process is required. The inspection button monitoring process is performed in parallel with the fire monitoring process at a predetermined cycle, for example, every 0.15 seconds.

When the inspection button monitoring process is started (S3
1) In the microcomputer 10, it is confirmed whether or not an ON signal, which is an inspection command for the inspection button 75, is input (S32). When the ON signal of the inspection button 75 is confirmed, it is determined that the inspection button 75 is pressed. The ON flag is "set" (S33), and if it cannot be confirmed, it is determined that the inspection button 75 is not pressed and the inspection button ON flag is "cleared" (S34). The state where the check button ON flag is "clear" means that the state returns to the state of fire monitoring processing. If the inspection button ON flag has already been set in S33, S33 may be passed. Then, the inspection button ON flag is cleared.
Then, the inspection button long time ON flag described later and the timer 76 described later are "cleared" (S35), and the automatic inspection abnormality flag stored in the RAM 21 showing the result of the automatic inspection processing is checked (S36). If the flag is in the "set" state, the abnormality is displayed as described above. Supplementing the explanation of the flow of this part, if the result of the automatic inspection is abnormal, the abnormality display continues regardless of whether the inspection button 75 is on or off from the time when the automatic inspection determines that there is an abnormality.

If the automatic inspection abnormality flag is not "set", normal is displayed. That is, the “normal display” state in which only the green power lamp 71 is lit continues to be maintained. If the check button ON flag is set by checking the ON signal of the check button 75 (S33),
It is checked whether the check button long-time ON flag has been previously set (S39). Here, the "check button long time ON flag" is a flag for abnormality set when the check button 75 is continuously pressed for 60 seconds or more for some reason.

Check button long-time ON flag is "set"
If not, the state of the inspection button "ON" is checked by the timer 76 (S41). Here, the continuation state of the inspection button “ON” means that the inspection button 75 is monitored for “ON” at a predetermined time, for example, every 0.15 seconds after the inspection button 75 is pressed. Timer 76 incremented by 1
(Or the counter circuit) is used to confirm the number of times of continuation or the duration of time, and if it is found that the inspection button 75 is not pressed by checking every predetermined time, the count value (count) of the timer 76 is cleared, In the state where the ON state continues, the addition to the timer 76 is continued by checking every predetermined time.

If the check button "ON" is continuously monitored every 0.15 seconds, that is, if the count value of the timer 76 is 400 times or more, it means that the check button has been turned on for 60 seconds or more. Is "set" (S4
1). If the check button ON flag is "set" for a long time, it means that the check button 75 has failed and continues to be turned ON, which is an abnormal state and an error is displayed (S
40). That is, the microcomputer 10 outputs an abnormality determination signal to the lighting control circuit 70, and the lighting control circuit 70 turns off the red fire lamp 72 and turns on the green power lamp 71 based on the abnormality determination signal. Does not output a ringing signal to the ringing circuit 74, and the ringing circuit 74 issues an alarm indicating an abnormality indicating that the buzzer 73 does not ring (see FIG. 6). In addition,
Although the inspection button long-time ON flag is "set" (S41) and the abnormality is displayed, the abnormality display may not be performed even if the inspection button long-time ON flag is "set". it can. In this case, since it is clear that the inspection button 75 is out of order, a normal display may be displayed and the fire monitoring process may be started.

The check button "ON" continues for 400 times.
If it is less than 60 times, that is, less than 60 seconds, the inspection button is turned on for a long time.
The flag is not "set" but "clear" (S4).
3). For example, when the check button 75 is turned on to check the result of the automatic check processing, the time for the ON operation is short, and thus the check button long-time ON flag is “clear”. Therefore, check button is ON for a long time
When the flag is "cleared", the automatic automatic inspection abnormality flag stored in the RAM 21 showing the result of the automatic inspection processing is looked at (S44), and if the flag is in the "set" state, it is an abnormality display. . That is, the state where the power lamp 71 is turned on and off, the fire lamp 72 is turned off, and the buzzer 71 is not sounded remains. If the automatic automatic inspection error flag is "clear" instead of "set", a fire is displayed. That is, the fire lamp 72 is turned on and off, the power lamp 72 is turned off, and the buzzer 71 is rung. By pressing the inspection button 75 in this manner, the result of the “normal” of the automatic inspection performed immediately before can be immediately confirmed by blinking and lighting the fire lamp 72.

FIG. 5 shows the operation of each component when the result of the automatic inspection process is confirmed by operating the inspection button 75 described above.
Explaining with the time chart of R, when the inspection button 75 is pressed, R indicating the result of the automatic inspection processing that has already been performed is displayed.
When looking at the automatic automatic inspection abnormality flag stored in AM21, when the inspection result is normal in the automatic inspection processing and there is no abnormality flag, the power lamp 71 is turned off, the fire lamp 72 is turned on and off, and the buzzer 73 is turned on. Sound continuously. Then, in these states, release the check button 75
Continue until FF. The inspection button 75 is used to confirm the result of the automatic inspection process, but in the case of the fire monitoring process, it is determined that there is a fire, the red fire lamp 72 is blinked and turned on, and the green power lamp 71. If the check button 75 is pressed while the light is turned off and the buzzer 73 is sounded, the microcomputer 10 outputs a normality determination signal to the lighting control circuit 70, and the lighting control circuit 70 returns from the previous fire display to normal. It operates as a display and the green power light 71
Is turned on and the buzzer 73 stops ringing. At the same time, the timer built in the microcomputer 10 operates to lock the operation of the buzzer 73 for 5 minutes, and the buzzer 73 for 5 minutes.
Do not ring.

(4) The voltage monitoring process will be described. In this embodiment, the AC power input from the power plug 62 is converted into a DC power supply 24V voltage by the AC-DC converter 61, and the constant voltage circuit 60 converts the AC power supply voltage to a constant voltage of 3V and supplies the voltage to the microcomputer 10. There is. On the other hand, the voltage monitoring circuit 63 monitors the voltage output from the AC-DC converter 61,
When the voltage output from the AC-DC converter 61 becomes, for example, 16 V or less, an abnormality signal is output to the microcomputer 10, and the microcomputer 10 outputs an abnormality determination signal to the lighting control circuit 70.
The lighting control circuit 70 determines the power lamp 71 based on the abnormality determination signal.
Only blink and turn on. In this way, even when the AC-DC converter 61 is abnormal, the power supply lamp 71 is turned on and off so that the user can know the abnormality.

In the above embodiment, the photoelectric sensor has been described as an example of the fire detector, but it goes without saying that it can be applied to a thermal fire sensor. Further, in the case of a thermal type fire detector, a thermistor is used for the heat-sensitive section, and it is possible to detect an abnormality in the disconnection state of the thermistor. For example, in the case of a thermal type using a thermistor, an output resistor is connected in series with the thermistor, and an analog-digital converter is connected to the connection point. Then, fire monitoring is performed by comparing the digital signal corresponding to the voltage value at the connection point with the fire threshold value. The thermistor is connected in parallel with a switch and a resistor that are normally open, and the switch is periodically closed for automatic inspection. In the above embodiment, the inspection is performed by increasing the gain of the gain adjustment circuit during inspection, but a test light emitting element may be provided on the optical axis of the light receiving element. The test light emitting element may be caused to periodically emit light to increase the amount of light received by the light receiving element and the fire detection means may be inspected. In the above embodiment, when the inspection result by the automatic inspection is abnormal, the abnormality is displayed immediately. However, as in the normal case, the storage unit stores the inspection result “abnormal”. The abnormality display may be displayed for the first time when the check button is pressed. Further, as the alarm means, the display form of the indicator light may not be changed. That is, the buzzer may continuously beep when the automatic inspection is abnormal, and in the normal case, the buzzer may intermittently beep when the inspection button is pressed. In order to solve the conventional problems, for example, by pressing the check button for a moment, the inspection mode is set, the gain is increased, the pseudo sensor output is output, and it is checked whether the function of the fire detection unit is normal. The result may be displayed. In this case, if a certain time has elapsed after the inspection button was first pressed, or if the inspection button was pressed again while the inspection result was being displayed, the inspection is forcibly ended and the monitoring state is restored. Also, when the inspection result is abnormal, the inspection is similarly ended after a certain period of time.

[0025]

As described above, according to the present invention, the pseudo sensor output testing means periodically outputs the pseudo sensor output, and the comparing means compares the pseudo sensor output with the reference value or more,
When the pseudo sensor output is above the reference value, clear the state of the automatic inspection abnormality flag, and when it is judged that the pseudo sensor output is below the reference value, the automatic inspection abnormality flag is set and stored in the storage means. When the inspection command from the inspection button is received, the inspection and monitoring means outputs a fire determination signal to the alarm means when the automatic inspection abnormality flag in the storage means is stored as clear, so the inspection button was operated. At this time, the alarm means immediately issues a fire display alarm, which is the result of the periodical inspection and inspection, so that there is an effect that the inspector does not need to worry.

Further, according to the present invention, a timer is provided which is started based on the inspection command of the inspection button and stops its operation when the inspection command is released, and the inspection monitoring means counts the predetermined time for the timer. Since the abnormality determination signal is output to the alarm means in the above cases, if the inspection button is pressed and remains pressed when the inspection button is operated, the inspection button is pressed for a predetermined time or longer. If the continued state continues, the alarm means gives an alarm indicating an abnormality, so the inspector has the effect of noticing that the fire detector is in an abnormal state.

Further, according to the present invention, a timer is provided which is started based on the inspection command of the inspection button and stops its operation when the inspection command is released, and the inspection monitoring means counts a predetermined time for the timer. In the above case, the inspection command of the inspection button is released and the operation of the timer is stopped. Therefore, if the state where the inspection button is pressed for a predetermined time or more continues, the inspection command of the inspection button is released and the timer is stopped. By stopping the operation of, there is an effect that it is possible to return to the normal fire monitoring state.

Further, according to the present invention, when the automatic inspection abnormality flag is set, the abnormality is displayed immediately even if the inspection button is not pressed. Can be noticed.

Further, according to the present invention, when the voltage monitoring circuit for monitoring the internal voltage of the fire detector detects a voltage abnormality, the abnormality determining signal is output to the alarm means, so that the internal voltage of the fire detector is equal to the voltage. In the case of an abnormality, the alarm means immediately issues an alarm indicating an abnormality, so that the person in the dwelling unit can know the abnormality due to the voltage abnormality of the fire detector.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a fire detector according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a fire monitoring process of the fire detector.

FIG. 3 is a flowchart showing an automatic inspection process of the fire detector.

FIG. 4 is a flowchart showing an inspection button monitoring process of the fire detector.

FIG. 5 is a time chart showing an inspection button monitoring process of the fire detector.

FIG. 6 is an explanatory diagram showing a display state of a fire lamp and a power supply lamp of the fire detector and an operating state of a buzzer.

[Explanation of reference numerals] 10 microcomputer, 20 ROM, 21 RAM, 30
Light emitting circuit, 31 light emitting element, 40 amplifying circuit, 41 light receiving element, 42 gain adjusting circuit, 60 constant voltage circuit, 6
3 voltage monitoring circuit, 70 lighting control circuit, 71 power lamp, 72 fire lamp, 73 buzzer, 74 ringing circuit, 7
5 Check button, 76 timer.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5C085 AA03 AB01 AC14 BA33 CA13                       DA06 DA07 DA08 DA16 DA17                       EA27 EA38 EA39 EA43                 5G405 AA01 AA08 AB02 AC02 AD06                       AD07 CA13 CA21 CA23 DA07                       DA08 DA21 DA22 FA03

Claims (8)

[Claims] 1. A fire detection means that detects a physical quantity of a fire phenomenon and outputs a sensor output corresponding to the physical quantity, and the sensor output and a fire level for fire judgment are compared, and when it is judged that there is a fire, the fire judgment is carried out. A fire detector comprising a comparison means for outputting a signal and an alarm means for issuing a fire display alarm based on the fire discrimination signal, a test means for periodically checking the fire detection means, and a test means for the test means. A fire detector comprising: a storage means for storing an inspection result and an inspection button, wherein when the inspection button is pressed, the alarm means is operated based on the inspection result. 2. The fire detector according to claim 1, wherein when the inspection result is abnormal, the alarm means immediately displays an abnormality. 3. A fire detection means for detecting a physical quantity of a fire phenomenon and outputting a sensor output corresponding to the physical quantity, and the sensor output and a fire level for fire judgment are compared, and when it is judged that there is a fire, the fire judgment is carried out. In a fire detector comprising a comparison means for outputting a signal and an alarm means for issuing a fire display alarm based on the fire discrimination signal, an inspection button for inspecting the fire detection means, and the inspection button is pressed. A fire detector, characterized in that it is provided with means for monitoring whether the ON signal at the time of being kept is in a continuous state for a predetermined time. 4. A fire detection means for detecting a physical quantity of a fire phenomenon and outputting a sensor output according to the physical quantity, a reference value storage means for storing a value of the sensor output at the time of fire as a reference value, and the fire. Comparing means for comparing the sensor output output from the detecting means with the reference value, and an alarm for issuing a fire display alarm based on a fire discrimination signal in which the comparing means discriminates a fire when the sensor output is greater than or equal to the reference value. In a fire detector including means, a pseudo sensor output testing means for periodically outputting a pseudo sensor output, and the comparing means compares the pseudo sensor output with a reference value to set an automatic inspection abnormality flag state. , A storage means for storing the state of the automatic inspection abnormality flag, an inspection button for outputting an inspection command, and an automatic inspection abnormality flag for the storage means when the inspection button inspection command is received. Fire detector characterized by comprising a inspection monitoring means for outputting a fire discriminating signal to said alarm means when grayed is clear. 5. A timer is provided which is activated in response to an inspection command of the inspection button and clears a count when the inspection command is released, and the inspection monitoring means is provided when the count time of the timer is a predetermined time or more. The fire detector according to claim 1, wherein an abnormality determination signal is output to the alarm means. 6. A timer is provided which is activated based on an inspection command of the inspection button and clears a count when the inspection command is released. When the inspection monitoring means has a count time of a predetermined time or more, The fire detector according to claim 1, wherein the inspection command of the inspection button is released and the operation of the timer is stopped. 7. The comparison means compares the pseudo sensor output with a reference value, and when the state of the automatic inspection abnormality flag is set, the inspection monitoring means immediately outputs an abnormality determination signal to the alarm means. The fire detector according to claim 1, wherein: 8. A fire detection means for detecting a physical quantity of a fire phenomenon and outputting a sensor output corresponding to the physical quantity, a reference value storage means for storing a value of the sensor output during a fire as a reference value, and the fire. Comparing means for comparing the sensor output output from the detecting means with the reference value, and an alarm for issuing a fire display alarm based on a fire discrimination signal in which the comparing means discriminates a fire when the sensor output is greater than or equal to the reference value. And a voltage monitoring circuit for monitoring the internal voltage of the fire sensor,
A fire detector, which outputs an abnormality determination signal to the alarm means when the voltage monitoring circuit detects an abnormal voltage.