JPS626280B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an automatic fire alarm that is used to confirm whether or not the automatic fire alarm operates normally by forcibly heating the heat-sensitive part of the automatic fire alarm. The present invention relates to a testing device.

Conventional test equipment of this type is 250~500W.
A device that confirms the operation of an automatic fire alarm by irradiating the heat-sensitive part of the automatic fire alarm with heat rays emitted from an infrared light bulb, or a device that burns vaporized gas such as benzene in a platinum catalyst crater. There is a device that checks whether an automatic fire alarm is working properly by applying the radiant heat to the heat-sensitive part of the automatic fire alarm.

However, in the former case, since it is powered by commercial power, it is clean and there is no risk of ignition, but since the irradiation surface of the heat ray is almost the entire spherical surface, even if appropriate reflection etc. are used, the The efficiency of using heat wires was very low, and therefore it took a long time to raise the temperature of the heat-sensitive part of an automatic fire alarm and confirm its operation, resulting in poor workability. In addition, in this case, only commercial power can be used, so the degree of use is limited depending on the presence or absence of an outlet, and it lacks convenience.

Furthermore, the latter had drawbacks in terms of performance, safety, and operability. First of all, in terms of performance, it takes a considerable amount of time to generate enough heat after ignition, and it is not very responsive. Therefore, when the test device is moved, it must be moved with the ignition always on, which is not very desirable for the user.

Further, this type of catalytic combustor has the disadvantage that the amount of heat generated is largely dependent on the ambient temperature, and, for example, at low temperatures, where a large amount of heat is required, the amount of heat generated is less than at room temperature. In addition, when inspecting disaster prevention equipment, we found that highly flammable benzine was used as fuel, and that the surface temperature of the catalyst was at a maximum of 600°C.
Celsius, and also had drawbacks in terms of safety, such as the presence of an exposed heat-generating portion that could be a source of ignition for organic solvents, etc. Furthermore, in terms of operability before use, it required troublesome preparatory operations such as fuel preparation, oil filling, ignition, and waiting for temperature rise, making it extremely inconvenient to use.

The present invention aims to provide an automatic fire alarm testing device that eliminates the above-mentioned conventional drawbacks, and the present invention will be explained below based on drawings showing embodiments thereof.

In FIGS. 1 to 4, 1 is a test device main body, and this test device main body 1 includes a housing 4 having an opening 3 on the top surface into which a heat-sensitive part 2a of an automatic fire alarm 2 is introduced; It is composed of a heating element 5 and a blower 6 that discharge hot air toward the heat-sensitive part 2a of the automatic fire alarm 2 introduced into the housing 4. The heating element 5 has a large number of through-hole groups 7a in the vertical direction, and uses a heating resistor element 7 having positive temperature characteristics. Moreover, the blower 6 is
It is composed of a fan 8, a fan case 9, a fan cover 10, and a motor 12 that rotates the fan 8 via a shaft 11. 13 is a circuit board, which includes a heating resistance element 7, a motor 12, and an indicator light 14.
and constitutes a power distribution board to the power cord 15. Reference numeral 16 denotes a holding device for holding the test device main body 1, and this holding device 16 includes a holding fitting 18 that holds the housing 4 swingably with a bolt 17, and a pipe 19 for lifting the test device main body 1 to a high place. and a connector 21 that holds the pipe 19 with a stopper 20 so that its height can be freely adjusted.

22 is a portable power source, and as shown in FIGS. 2 and 3, this portable power source 22 has a built-in battery power source 24 in a case 23, and performs on/off operations of an output terminal 25 and the battery power source 24. It is equipped with a power switch 26, a no-fuse breaker 27, a battery capacity indicator 28, and a charging terminal 29. The battery power source 24 may be of any type, such as a primary battery or a secondary battery, as long as it is a DC battery, but in this embodiment, a nickel-cadmium type battery that has a large output, is rechargeable, and is lightweight is used. By connecting 10 of these batteries in series,
I am getting an output of about 12V. 30 is the test device main body 1
This intermediate cord 30 connects the portable power source 22 with a plug 32 that is inserted into the receptor 31 fixed to the holding fitting 18 at one end, and the output terminal 25 of the portable power source 22 at the other end.
A plug 33 is provided to be connected to. Note that a power cord 15 is connected to the receptor 31. Further, in the wiring diagram shown in FIG. 3, 34 is a resistor connected in series with the indicator light 14.

Next, a test method using this test device will be explained. First, the opening 3 on the test device main body 1 side is applied to the heat sensitive portion 2a of the automatic fire alarm 2 installed on the ceiling or the like, and the heat sensitive portion 2a is introduced into the opening 3 on the test device main body 1 side. Due to this introduction, a substantially sealed air chamber 35 is formed between the housing 4 on the test device main body 1 side and the automatic fire alarm 2.
In this state, turn on the power switch 26 of the portable power source 22.
When turned on, output terminal 25, intermediate code 3
0, the heating resistance element 7 in the housing 4, the motor 12 of the blower 6, and the indicator light 14 via the receptor 31
are energized at the same time. As the motor 12 rotates, the fan 8 connected to the motor 12 via the shaft 11 rotates, sucking up air from the suction port 36 provided below the fan case 9, and the air flows between the fan case 9 and the fan. It is led to the through-hole group 7a of the heating resistor element 7 through the fan chamber 37 and the exhaust port 38 formed with the cover 10.
Then, this air is sufficiently heated on the wall surface of the through hole group 7a to become hot air, and this hot air is transmitted to the automatic fire alarm 2.
is discharged toward the heat-sensitive section 2a. The hot air that hits the heat sensitive part 2a radiates some or most of its heat through the heat sensitive part 2a, etc., and moves inside the almost sealed housing 4 as shown by the arrow, that is, through the through hole of the heating resistor element 7. Group 7a → Air chamber 35 → Heat sensitive part 2a → Return path 39 → Suction port 36 → Fan chamber 37
It is forced to circulate in the following order: → discharge port 38 → through-hole group 7a of heating resistor element 7. Due to this forced circulation, the hot air hitting the heat sensitive part 2a of the automatic fire alarm 2 gradually becomes high temperature, and by heating the heat sensitive part 2a to its operating temperature or by giving the automatic fire alarm 2 a predetermined temperature rise, automatic fire alarm 2
can be operated. Further, by determining the relationship between the energization time and the temperature rise in advance, it is also possible to determine whether the sensitivity of the automatic fire alarm 2 is good or bad.

Although not shown in the above embodiment, if a more accurate determination is required, a temperature sensor can be installed above the heating element 5 in the air chamber 35 in advance so that the temperature can be measured from an external meter. The temperature during operation can also be accurately read.

Further, in the above embodiment, the heating resistor element 7 having a positive temperature characteristic was used as the heating element 5. Since the heating resistor element 7 exhibits a positive temperature characteristic, the temperature rises easily, and the heating element 7 can be used particularly intermittently. In this test device, which tests a large number of automatic fire alarms, when the power switch 26 is turned on,
It is very effective as it can be used immediately.
Further, when a portable power source 22 is used to improve portability, it is not preferable to keep the power source turned on continuously because the number of uses per charge decreases. In this respect as well, the heating resistor element 7 exhibiting positive temperature characteristics is most effective. The shape of the through hole group 7a of the heating resistor element 7 is not limited to the original honeycomb shape, that is, a regular hexagon, but may be a harmonica-shaped square hole, a round hole, or the like.

Next, the characteristics of the heating resistor element 7 having the positive temperature characteristics will be described. The heating resistor element 7 in the embodiment of the present invention has a Curie temperature of 300° C. or less. In general, automatic fire alarms are often installed in places that are full of flammable materials, such as paint factories. Therefore, selecting a heat generating resistor element 7 having a high Curie temperature is effective in terms of speeding up the start-up, but naturally it also comes with the risk of ignition. From this point of view and when the operating temperature of automatic fire alarms is the highest
Since the temperature is 150°C, if the heating resistor element 7 with a Curie temperature of 300°C or less is used, it can be operated quickly and favorably, and the maximum temperature of the test device body 1 can be kept at about 300°C. ℃ or less, and as a result, the temperature can be kept below the ignition temperature or ignition of the solvent, so there is no risk of ignition, and it is extremely safe.

Moreover, if the temperature of the hot air discharged from the heating resistor element 7 in the above embodiment exceeds 250° C., it will cause thermal damage in heat sensing, which is not preferable.

However, in the embodiment of the present invention, even if the heating resistor element 7 with a Curie temperature of 300° C. is used, by setting the distance between the heat sensing part 2a of the automatic fire alarm 2 and the heating resistor element 7, the above-mentioned The problem can be solved.

Further, in the above embodiment, in order to prevent hot air from escaping to the outside and increase thermal efficiency, a substantially sealed air chamber 35 is formed between the housing 4 on the test device main body 1 side and the automatic fire alarm 2. In this case, the automatic fire alarm 2 is a differential spot type, and if the automatic fire alarm 2 is of a different type, for example, a constant temperature spot. In the case of a mold type, as shown in FIG. 5, an attachment 41 is attached to the housing 4 that constitutes the test device main body 1, and the upper end of this attachment 41 is applied to the automatic fire alarm 2 to eliminate gaps. be able to. And also the housing 4
The opening 3 into which the heat sensitive part 2a is introduced is the heat generating part 2.
The structure is such that the opening area when the heat sensitive part 2a is introduced is 50% or less of the opening area before the heat sensitive part 2a is introduced, and the experimental results show that if it is within this 50% range, the thermal efficiency is low. The rate of decline was relatively small.

As described above, according to the present invention, since the power switch for turning on and off the power battery is provided on the portable power source side, it is possible to control the power supply at hand.
By operating this switch, the blower blows hot air onto the heat-sensitive part of the automatic fire alarm, and the hot air is forced to circulate through the return path provided inside the housing, unlike conventional natural convection or radiation methods. Heat conduction to the heat-sensitive part is fast, and therefore the time required for the test is short, so the workability can be further improved. In addition, a portable power source with a built-in battery power source that operates the heating element and blower is equipped with a power switch that turns the battery power on and off, so when testing automatic fire alarms, the portable power source is By holding it in your hand or shoulder, you can operate the power switch with one hand, and the presence of the power switch allows you to keep the on time of the test equipment to the minimum necessary. It is something.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing the test device according to an embodiment of the present invention set in an automatic fire alarm, Fig. 2 is a configuration diagram showing the relationship between the test device and a portable power source, and Fig. 3 is a FIG. 2 is a wiring diagram, FIG. 4 is a top view of the same test device, and FIG. 5 is a vertical sectional view showing the same test device set in an automatic fire alarm different from that in FIG. 1...Test device main body, 2...Automatic fire alarm,
2a... heat sensitive part, 3... opening, 4... housing, 5... heating element, 6... blower, 22... portable power supply, 24... battery power supply, 26... power switch.

Claims (1)

[Claims] 1. A housing with an opening on the top surface into which the heat-sensitive part of the automatic fire alarm is introduced, an air blower that blows hot air toward the heat-sensitive part of the automatic fire alarm installed in the housing, and a A gap is formed between the fan case and the housing, which is configured with a heating resistor element having a large number of through-hole groups and has positive temperature characteristics, and which houses a fan constituting the blower. A test device main body serving as a return path for hot air to circulate within the housing, and a portable power source having a built-in battery power source for operating the heating element and the blower, and a power switch for turning on and off the battery power source. An automatic fire alarm test device characterized by comprising: