JPH0413757Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fire test device for testing the operation of a thermal analog fire detector by applying an arbitrary test temperature to the thermal analog fire detector.

Conventional thermal fire detectors have mainly been so-called on-off type fire detectors, which determine that a fire has occurred and issue an alarm when the temperature rise due to the occurrence of a fire reaches a predetermined threshold. On the other hand, so-called analog fire detectors, which detect the temperature rise due to the occurrence of a fire in an analog manner, can be used not only for fire detection but also for indoor temperature monitoring, etc., and have various advantages. The development of analog fire detectors is being promoted. For such on-off type or analog type fire detectors, it is necessary to conduct periodic operation tests to check whether they are actually working when installed in buildings, etc., and conventional fire test equipment cannot be used. A fire test device that performs an operation test by burning benzine, etc. to give a test temperature that rises above a predetermined threshold value, or a fire test device that performs an operation test by applying a fixed set temperature that exceeds a threshold value using a heater, etc. Test equipment etc. were proposed.

However, such conventional fire test equipment can only provide an increased temperature that exceeds a predetermined threshold, or only one type of test temperature.
On the other hand, in order to test the operation of analog fire detectors, several different test temperatures are applied, and the detection status of the fire detector at each test temperature is checked to determine whether it is operating normally. It is necessary to make judgments, and there has been a strong need for a fire testing device that can accurately test the operation of such analog fire detectors.

The present invention was developed in view of the above, and aims to provide a fire testing device that can accurately test the operation of not only on-off type thermal fire detectors but also analog type thermal fire detectors. purpose.

In order to achieve this purpose, the present invention conducts an operation test of an analog fire detector by providing a temperature control circuit that can set an arbitrary test temperature and can set the test temperature variably. It is something.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is an overall diagram showing the configuration of a fire test device according to the present invention, and FIG. 2 is a circuit diagram of the fire test device shown in FIG.

First, to explain the configuration, 1 is an analog fire detector that is installed on the ceiling etc. and detects the temperature rise due to the occurrence of a fire in an analog manner, 2 is a tester that gives a test temperature to fire detector 1, and 3 is a temperature sensor. It is a controller, connected to the tester 2 through the power supply and signal line 4, and controls the test temperature of the tester 2. The tester 2 includes a fitting part 5 that fits into the fire detector 1, a heat generating part 6 that generates a test temperature, and a support part 7 that is freely expandable and contractable. Inside the heat generating unit 6, a heater 8 with a large heat generating capacity and a blower 9 are arranged below the heater 8, and the warm air generated by the heat generated by the heater 8 is blown toward the fire detector 1. ing. Further, a temperature sensor 10 is fixed to the inner wall of the fitting part 5 at a height where the heat sensitive part of the fire detector 1 is located when the fitting part 5 is fitted to the fire detector 1. A temperature detection signal having a temperature substantially equal to that of the heat-sensitive portion of the fire detector 1 during an operation test of the fire detector 1 is transmitted to the temperature controller 3.

Next, the internal configuration of the temperature controller 3 will be explained. 1
1 is a power switch with a built-in power lamp; 12
is a fuse, which supplies power supply voltage to the air volume control circuit 13 and the temperature control circuit 14 via the fuse 12. The air volume control circuit 13 applies an output voltage to the air blower 9 according to the setting of the regulator 15 to control the air blower 9.
The amount of air blown to the fire detector 1 is controlled by changing the voltage applied to the fire detector 1 and controlling the rotational speed of the air blower 9. Further, the output voltage of the air volume control circuit 13 is connected as an input to the temperature control circuit 14.
The upper limit of the control voltage from the temperature control circuit 14 to the heater 8 is defined.

16 is a temperature setting section that sets an arbitrary test temperature, and the temperature control circuit 14 applies a control voltage to the heater 8 within the range of its own input voltage and according to the set value of the temperature setting section 16 to set the heater 8. 8. Controls the amount of heat generated. Further, the temperature control circuit 14 inputs a temperature signal from the temperature sensor 10 provided in the tester 2 and displays the temperature on the temperature display section 17, and also monitors the temperature rise due to heat generation of the heater 8. Temperature sensor 10 for 16 set temperatures
The voltage supplied to the heater 8 is intermittent at predetermined intervals depending on the temperature rise from 1 to 3, and the temperature is controlled so as to converge to the test temperature set by the temperature setting section 16.

Here, in order to speed up the temperature rise of the heat sensitive part of the fire detector 1, the heater 8 uses a heating element with a large heat generating capacity, and a large current is passed through the heater 8 to increase the amount of heat generated by the heater 8. In this case, it is necessary to prevent the heating element of the heater 8 from burning out due to the heat generated by the heater 8 itself. For this reason, the regulator 15
control and the upper limit of the voltage applied to the heater 8 are adjusted in conjunction with each other, and when a large current flows through the heater 8 and the amount of heat generated by the heater 8 is large, the air volume of the blower 9 is simultaneously increased and the fire detector 1 is activated. In addition to increasing the temperature of the heat-sensitive portion quickly, the heating element of the heater 8 is automatically prevented from burning out.

Next, the operation will be explained. When the power switch 11 is turned on, the air volume control circuit 13 is connected via the fuse 12.
Power is supplied to the temperature control circuit 14. The output voltage according to the setting of the regulator 15 is the output voltage of the air volume control circuit 13.
The voltage is output to the blower 9 to operate the blower 9, and is also supplied as an input voltage to the temperature control circuit 14. The input voltage of this temperature control circuit 14 is set as the maximum limit, and a control voltage corresponding to the set value of the temperature setting section 16 is outputted from the temperature control circuit 14 to cause the heater 8 to generate heat. Normally, when the fire test device is in operation, the regulator 15 is set to the maximum and a maximum voltage approximately equal to the power supply voltage is supplied to the input terminal of the temperature control circuit 14, thereby causing a large current to flow through the heater 8. At the same time, the maximum voltage is supplied to the blower 9, the amount of air from the blower 9 is maximized, and hot air generated by the heat generated by the heater 8 is blown to the fire detector 1, thereby causing the fire detector to detect the fire. The heating speed is maximized.

When warm air generated by the heat generated by the heater 8 is blown to the fire detector 1, a temperature sensor is installed on the inner wall of the fitting part 5 that fits with the fire detector 1 at the height where the heat sensing part of the fire detector 1 is located. 10 is fixed, a temperature signal having a temperature substantially equal to that of the heat sensitive section of the fire detector 1 is transmitted to the temperature control circuit 14, and the temperature is displayed on the temperature display section 17. On the other hand, in the temperature control circuit 14, a temperature control band is set within a predetermined range centered on the set temperature T degrees, for example, T±2 degrees, at the same time as the temperature setting section 16 sets an arbitrary test temperature. When the detected temperature from the sensor 10 reaches within the temperature control band, the power supply to the heater 8 is interrupted at a predetermined period and at intervals proportional to the detected temperature from the temperature sensor 10, and the test is set by the temperature setting unit 16. Temperature control is performed to converge on the temperature.

As explained above, according to the present invention, it is possible to perform operation tests not only on on-off type thermal fire detectors but also on analog type thermal fire detectors, and by applying different arbitrary test temperatures. By checking the detection status for the test temperature, a more accurate analog fire detector operation test can be performed.

[Brief explanation of drawings]

FIG. 1 is an overall diagram showing the configuration of a fire test device according to the present invention, and FIG. 2 is a circuit diagram of the fire test device in FIG. DESCRIPTION OF SYMBOLS 1... Fire detector, 2... Test device, 3... Temperature controller, 4... Power supply and signal line, 5... Fitting part, 6... Heat generating part, 7... Support part, 8... Heater, 9...Blower, 10...Temperature sensor, 11...
...Power switch, 12...Fuse, 13...Air volume control circuit, 14...Temperature control circuit, 15...Adjuster, 16...Temperature setting section, 17...Temperature instruction section.

Claims (1)

[Scope of claim for utility model registration] A heater as a heat source, an air blower that blows warm air generated by the heater to a thermal fire detector installed on the ceiling, etc., and a temperature sensor that detects the test temperature by the air blower. A fire test device consisting of a tester equipped with each of the above, and a temperature controller that controls the test temperature of the tester, the temperature controller including a temperature setting unit that sets an arbitrary test temperature, and a temperature setting section that sets an arbitrary test temperature. a temperature control circuit that supplies a control voltage to the heater based on a set test temperature of the test device and a temperature detection signal from the temperature sensor to converge the test temperature of the test device to the set test temperature set by the temperature setting unit; and a temperature display section that displays the temperature detected by the temperature sensor.