JP5117750B2 - Fire detector and inspection device for fire detector - Google Patents

Description

  The present invention relates to a fire detector and a fire detector inspection device capable of confirming sensitivity simultaneously with operation confirmation by a smoke tester when inspecting a fire detector.

Conventional detector inspection tools can only perform a smoke sensor smoke test, and when performing a sensitivity test, it was necessary to remove the smoke sensor from the ceiling or the like and attach it with the sensitivity tester. Therefore, it takes time to attach and detach the sensor.
JP 09-097389 A

  Conventional fire detectors are activated when the detection level exceeds the fire threshold due to the generation of smoke by the detector inspection tool. At that time, the inspector waits for the operation time until the fire detector is activated with a stopwatch or the like. I was measuring. In addition, the sensitivity test required that the fire detector removed from the ceiling be attached to the sensitivity tester. Therefore, it takes work time and labor.

  It is an object of the present invention to provide a fire detector and a fire detector inspection device that can simultaneously perform a smoke detection test and a sensitivity test of a fire detector to improve workability of an inspector.

In the fire detector of the present invention, a fire detection unit, control means for storing sensitivity information in a storage unit, and detecting a fire when a detection level from the fire detection unit is equal to or higher than a fire threshold and transmitting a fire signal And in the fire detector having a display means that is turned on at the time of fire discrimination by the control means, and a timing means, supply a test gas by an inspection device having a supply means for supplying gas to the fire detection unit, said control means, said detection level increase rate from the fire detection unit recognizes the start of Ru pressurized smoke test good in the inspection device and equal to or greater than a predetermined pressure smoke threshold, starts measuring the operation time to the clock means is allowed, the detection level is recognized as the operation of the fire detector according Kakemuri test when the above fire threshold, the ends the measurement of the operating time counting means, said storing operation time measured as the sensitivity information Stored in said display means, the second lighting state and the switching control of a first lighting state and fire display is a light pulse for transmitting the sensitivity information to the inspection apparatus at the time of transmission of the fire signal To do.

  In the fire detector of the present invention, the sensitivity information is the degree of contamination of the fire detector or the operation time of the fire detector.

  The fire detector of the present invention, when smoke particles enter the smoke detection space due to the injection of test gas from the inspection device, displays sensitivity information on each indicator when the detection level rises above the fire threshold. It is to be sent. Therefore, it is not necessary for the inspector to use a stopwatch or the like from the start of smoking of the inspection device until the fire detector is triggered.

  FIG. 1 is a block diagram of a photoelectric smoke detector 20 in an embodiment of the present invention. The photoelectric smoke detector 20 includes a light emitting circuit 1, a light receiving amplification circuit 2, a control circuit 3, a constant voltage circuit 4, an operation display circuit 5, and a transmission circuit 6. The control circuit 3 includes a CPU 17 that includes an A / D converter 13, a fire determination unit 14, a storage unit 15, a timer unit 16, and the like.

  A light emitting element (not shown) in the light emitting circuit 1 irradiates the smoke detection space with pulsed light at a predetermined interval. When smoke particles enter the smoke detection space, a light receiving element (not shown) in the light receiving amplification circuit 2 outputs a light reception signal based on the amount of scattered light received by the smoke particles. The control circuit 3 inputs the amplified signal amplified by the light receiving amplifier circuit 2 to the A / D converter 13, determines that the fire is detected when the obtained detection level is equal to or higher than the threshold value, and outputs a fire signal. Turn on the indicator lamp. The constant voltage circuit 4 supplies a stable voltage to each circuit. In addition, the operation display circuit 5 notifies that the fire detector is in an operating state by, for example, a visible light operation indicator lamp 19. Moreover, the transmission circuit 6 transmits sensitivity information to the inspection device by, for example, an infrared light sensitivity indicator lamp 18.

  Sensitivity information consists of the degree of contamination in the smoke detection space and the operating time of the sensor in the smoke test. The degree of contamination of the smoke detection space is calculated by, for example, calculating an average value of detection levels stored in the storage unit 15 from, for example, 6 hours before to the present, and an increase in detection level due to increase in contamination from the start of monitoring, Or it stores in the memory | storage part 15 as a difference value with a fire threshold value, etc. The operation time of the sensor is calculated by, for example, calculating an increase rate (% / m / 6 seconds) of the detection level from 6 seconds before to the present time in the fire determination unit 14 of the control circuit 3. Judge whether it is more than the set smoke threshold. When the rate of increase is equal to or higher than the smoking threshold, the fire determination unit 14 recognizes that the smoking test has started and causes the time measuring means 16 to start measuring the operation time. The sensitivity indicator lamp 18 may be transmitted with a recognition signal for starting the smoke test. Then, when the detection level is equal to or higher than the fire threshold, the fire determination unit 14 recognizes that the fire detector is activated by the smoke test, ends the measurement of the operation time in the time measuring means 16, and stores it in the storage unit 15. Both or one of these sensitivity information is transmitted to the inspection device by a light pulse signal when the sensor is activated. Moreover, when providing a time measuring means in an inspection apparatus, you may make it transmit only a stain | pollution | contamination degree.

  In this state, the sensitivity indicator lamp 18 emits an infrared pulse including sensitivity information stored in the storage unit 15 of the CPU 17, while the operation indicator lamp 19 emits light continuously. The display timing of the sensitivity indicator lamp 18 and the operation indicator lamp 19 is arbitrarily set. When the indicator lamp is also used as one visible light emitting element, the control circuit 3 switches between sensitivity display and operation display when the detection level is equal to or higher than the fire threshold. In this state, when a recovery switch (not shown) of the receiver is operated, the photoelectric smoke detector 20 returns to the monitoring state. The photoelectric smoke detector 20 may be provided with a transmission unit to wirelessly transmit sensitivity information.

  FIG. 2 is a configuration diagram of the fire detector inspection device 30 according to the embodiment of the present invention. The inspection device 30 includes a gas cylinder 31 filled with a test gas, nozzle opening means 32 for opening the nozzle of the gas cylinder 31 and supplying the test gas to the fire detection unit of the photoelectric smoke detector 20, A light receiving means 33 that receives sensitivity information from the sensitivity indicator lamp 18 of the fire detector, a display means (not shown) that displays the received sensitivity information, and a test that determines whether the photoelectric smoke detector 20 is normal based on the sensitivity information. The determination unit 34 includes a hood 35 that covers the photoelectric smoke detector 20 during inspection, and a support rod 36 that brings the inspection device 30 close to the mounting position of the photoelectric smoke detector 20.

  A procedure by the fire detector inspection device 30 according to the embodiment of the present invention will be described. First, the inspector uses the support bar 36 to reliably cover the photoelectric smoke detector 20 installed on the ceiling surface or the like with the substantially bellows-shaped hood 35 of the inspection device 30. In this state, when the inspection device 30 is pushed up to the installation surface, the nozzle opening means 32 is pushed, the nozzle of the gas cylinder 31 is opened, and the test gas is injected. In this state, the ejection time is changed according to the sensitivity (1 type, 2 types, 3 types) of the photoelectric smoke detector 20. Since the photoelectric smoke detector 20 is covered with the hood 35, the test gas travels through the hood 35 and sequentially enters the smoke detection space from the smoke inlet of the photoelectric smoke detector 20. As a result, the rate of increase in the detection level rapidly increases above the smoking threshold, so that the fire detection unit 14 recognizes that the test gas has been injected and causes the time measuring means 16 to start measuring the operating time. Further, when the test gas continues to enter the smoke detection space and the detection level exceeds the fire threshold value, the photoelectric smoke detector 20 is activated, and the operation time measured by the time measuring means 16 is stored in the storage unit 15 and detected. Sensitivity information that combines the degree of contamination of the smoke space and the operating time is transmitted by light pulses. This light pulse is received by the light receiving means 33 of the inspection device 30, and the test determination unit 34 determines the test result. The display means displays the sensitivity information of the sensor and the test result.

  Further, the time measuring means 16 may be provided in the inspection device 30. In this case, the measurement of the operation time may be started when the gas opening means 32 of the inspection device 30 is pushed. In addition, when a time difference occurs from when the test gas enters the smoke detection space after the start of injection, the operation time may be corrected to be smaller than the measured value.

  When the rate of increase in the detection level becomes smaller than the clogging threshold of the insect screen after the start of smoke, the fire discrimination unit 14 of the photoelectric smoke detector 20 clogs the insect screen in addition to the sensitivity information at the normal time. Send an alarm. On the other hand, the inspection device 30 displays a clog alarm for the insect screen. This case is dealt with by cleaning an insect net (not shown) of the photoelectric smoke detector 20.

  FIG. 3 is a flowchart showing an operation during a test of the photoelectric smoke detector 20 in the embodiment of the present invention. In S1, the light emitting element emits pulses in the smoke detection space. In S 2, the detection level based on the light reception output of the light receiving element is calculated and stored in the storage unit 15. In S3, the average value of the detection levels from the past to the present stored in the storage unit 15 is calculated, and the degree of contamination of the smoke detection space is stored in the storage unit 15 as sensitivity information. In S4, the fire determination unit 14 of the control circuit 3 determines whether the rate of increase (% / m / hour) of the detection level is equal to or higher than a preset smoking threshold. If it is equal to or greater than the smoke threshold, it is recognized in S5 that smoke starts, and if it is less than the smoke threshold, the process returns to S1.

  In S6, the light emitting element emits pulses in the smoke detection space. In S 7, the detection level based on the light reception output of the light receiving element is calculated and stored in the storage unit 15. In S8, the average value of the detection levels from the past to the present stored in the storage unit 15 is calculated, and the degree of contamination of the smoke detection space is stored in the storage unit 15 as sensitivity information. In S9, the fire determination unit 14 of the control circuit 3 determines whether the detection level is equal to or higher than a preset fire threshold. If it is greater than or equal to the fire threshold, it is determined in S10 whether the rate of increase in the detection level from the start of smoke addition to the activation is greater than or equal to the clogging threshold of the insect screen. If it is equal to or higher than the clogging threshold value, it is determined as normal, sensitivity information is transmitted by the sensitivity indicator lamp 18 in S11, and the operation indicator lamp 19 is lit in S12. On the other hand, if it is less than the clogging threshold value, it is determined that there is an abnormality. In S13, sensitivity information and a clogging alarm are transmitted by the sensitivity indicator lamp 18, and the operation indicator lamp 19 is turned on in S14. If the detection level is less than the fire threshold in S9, the process returns to S6.

In addition, although the time which opens the nozzle of the gas cylinder 31 changes with the sensitivity (1 type, 2 types, 3 types) of the photoelectric smoke detector 20 to be checked, it can be checked by the same method. Moreover, although the example of the photoelectric smoke detector 20 was shown in embodiment, an ionization type smoke detector may be sufficient. Furthermore, it can be applied to heat detectors and flame detectors.

It is a block diagram of photoelectric smoke detector 20 in an embodiment of the present invention. It is a lineblock diagram of inspection device 30 of a fire detector in an embodiment of the present invention. It is a flowchart which shows the operation | movement at the time of the test of the photoelectric smoke detector 20 in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light emission circuit 2 Light reception amplification circuit 3 Control circuit 4 Operation display circuit 5 Constant voltage circuit 6 Transmission circuit 11 Light emitting element 12 Light receiving element 13 A / D converter 14 Fire discrimination part 15 Memory | storage part 16 Time measuring means 17 CPU
DESCRIPTION OF SYMBOLS 18 Sensitivity indicator lamp 19 Operation indicator lamp 20 Photoelectric smoke detector 30 Inspection device 31 Gas cylinder 32 Nozzle opening means 33 Light receiving means 34 Test judgment part 35 Hood 36 Support rod

Claims (1)

A fire detection unit, control means for storing sensitivity information in a storage unit, and a fire detection unit that transmits a fire signal when a detection level from the fire detection unit exceeds a fire threshold; In a fire detector having a display means to be lit and a time measuring means,
Supplying test gas by an inspection device having a supply means for supplying gas to the fire detection unit;
Said control means, said detection level increase rate from the fire detection unit recognizes the start of Ru pressurized smoke test good in the inspection device and equal to or greater than a predetermined pressure smoke threshold, starts measuring the operation time to the clock means is allowed, the detection level is recognized as the operation of the fire detector according Kakemuri test when the above fire threshold, the ends the measurement of the operation time to the clock means, the storage unit the operation time measured as the sensitivity information stored in said display means, the second lighting state and the switching control of a first lighting state and fire display is a light pulse for transmitting the sensitivity information to the inspection apparatus at the time of transmission of the fire signal A fire detector characterized by

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