JP6899749B2 - Sensitivity test device - Google Patents

Description

The present invention relates to a sensitivity test apparatus used for a sensitivity test of a smoke detector.

Conventionally, fire alarm equipment has been installed in buildings such as offices, and when a fire breaks out, the smoke generated by the fire is detected by a smoke detector and a warning signal is sent to the receiver to issue a fire alarm. It is output so that fire extinguishing, evacuation, and firefighting activities can be carried out.

The fire alarm system is inspected regularly after it is installed in the building, and for the smoke detector, the smoke detector installed on the ceiling is removed and the sensitivity test equipment brought in during the inspection is used. The sensitivity test of the smoke detector is being conducted.

In the sensitivity test device, a smoke detector to be tested is placed in the test space inside the device housing, smoke is supplied from the smoke generator to the test space in this state, and the smoke detector issues a report at a predetermined smoke concentration. We are conducting a sensitivity test to confirm.

As the smoke generator used in the sensitivity test apparatus, incense sticks, filter paper, gas spray for smoke test, and oils and fats are used.

However, when incense sticks are used, the smell is strong, so they are reluctant to use in buildings where many people gather, especially in hospitals, the number of incense sticks that can be inspected is limited, and they disappear in the middle. In addition, incense stick smoke has a relatively small particle size, so it is easy for ionized smoke detectors to issue a report in a short time, but for photoelectric smoke detectors, it takes time to issue a report. There was a problem that the work efficiency of inspection was poor.

In addition, when filter paper is used as the smoke generator, for example, the filter paper chopped to about 1 cm square is smoked with a pot heater, so it is difficult to continuously generate smoke at a constant speed, and further, the pot Since the heater is constantly heated to about 400 ° C., there is a problem that power consumption increases.

When a gas spray for smoke test is used, the price is high because Freon gas is used, and there is a problem that it is difficult to obtain a substitute Freon and the price rises in the future. In addition, it is not easy to control the amount of gas ejected, high-concentration smoke is generated, it takes time to restore the smoke detector, and it takes time to operate the low-sensitivity smoke detector, resulting in poor inspection efficiency. Further, although LPG can be used as an alternative gas, there is a problem that it is flammable and cannot be used at a low temperature.

When oils and fats are used, sewing machine oil, lamp oil, etc. are heated, but the odor is strong and it is not suitable for inspection in general buildings. In addition, oil smoke may stain the surface of the sensor and the ceiling surface, and may affect the sensitivity of the smoke detector. Further, since the core and the heater in which the oil and fat are impregnated are large, it is driven by a commercial AC power supply, the power consumption is also large, and it takes time for the heater temperature to become high and to start smoking.

In order to solve such a problem, in the sensitivity test apparatus of Patent Document 1, a smoke emitting portion that emits smoke from the tip portion is provided in the test space of the sensitivity test apparatus, and the smoke emitting portion has a heater and smoke emission inside the cylinder. It is equipped with a liquid supply unit impregnated with a water-soluble liquid that serves as an agent. When conducting a test, air is sent from the blower unit into the cylinder, and the water-soluble liquid vaporized by heating with a heater is atomized to emit simulated smoke. The sensitivity test of the smoke detector is performed.

According to such a smoke test jig, since the simulated smoke atomized by the vaporization of the water-soluble liquid is generated, there is no problem such as odor, and the smoke is continuously generated at a constant speed. This makes it possible to efficiently proceed with the sensitivity test of the smoke detector at the inspection site.

Japanese Unexamined Patent Publication No. 2013-127766 Japanese Unexamined Patent Publication No. 2013-127765

However, in such a conventional sensitivity test device, the smoke emitting unit that generates simulated smoke atomized by vaporizing the smoke agent is a smoke generator provided with a liquid supply unit and a heater, a blower unit, a control unit, and the like. Since it is necessary to additionally provide the sensitivity test device, the configuration of the sensitivity test device becomes complicated, and there is a problem that the existing sensitivity test device cannot be fully utilized.

Further, when a smoke emitting part that generates simulated smoke atomized by vaporization of a water-soluble liquid is built in the sensitivity test device, a structure for making a used smoke generator replaceable is required. Even in this case, it is desired to make full use of the structure of the existing sensitivity test apparatus.

Further, one sensitivity test requires, for example, about 0.05 cc of a smoke-generating agent, and since the sensitivity test of the smoke detector is performed several tens of times a day by going to the site, 2.5 cc to 3. A water-soluble liquid of about 0 cc is required, but since the conventional smoke emitting part has a cartridge structure, the amount of the water-soluble liquid used for smoke generation is small, and there is also a problem that the smoke generator needs to be replaced frequently.

Further, if the smoke agent is stored in the container, it is necessary to carry a sensitivity tester for each sensitivity test, so that a sealed structure of the smoke agent container is required so that the smoke agent does not spill. However, if the container for the fuming agent is sealed and the insertion part of the fuming body and the injection port of the fuming material are sealed with a stopper, it takes time and effort to open the cap for each test or replenishment of the fuming material. There is a problem.

According to the present invention, the fuming agent can be replenished without significantly changing the sensitivity test apparatus.
In addition, we provide a sensitivity test device that enables easy testing while preventing spillage of the smoke agent of the sensitivity test device, and that can generate simulated smoke atomized by vaporization of the smoke agent and supply it to the test space. The purpose.

(Sensitivity test device)
The present invention is provided in a housing .
A test space equipped with a smoke detector to be tested ,
A smoke generator that generates smoke to supply to the test space,
With
In a sensitivity test device that supplies smoke to the test space and tests the sensitivity of the smoke detector.
The smoke emitting part
A container that stores smoke agents and has a smoke agent inlet,
A non-flammable core material that is impregnated with the fuming agent stored in the container,
A heater that heats the smoke-producing agent impregnated in the core material to generate smoke,
A control unit that heats the flue gas impregnated in the core material by energizing the heater by a predetermined operation to generate smoke ,
Consists of
The container is characterized in that the through hole of the core material and the smoke agent inlet are each provided with a smoke agent liquid leakage prevention structure.

(Liquid leakage prevention cap for core material)
As liquid leakage prevention structure through holes of the core material, the liquid leakage prevention cap provided with a bore aperture have smaller than the outer diameter of the outer diameter substantially equal or core material of the core member corresponding to the position of the through hole of the core member Provided ,
The core material is provided in close contact with the inner surface of the aperture hole.

(Liquid leakage prevention structure for core material with liquid leakage prevention sheet)
As liquid leakage prevention structure through holes of the core material, the liquid leakage prevention sheet smaller through hole than the outer diameter is formed with an outer diameter substantially the same as or core material of the core member corresponding to the position of the through hole of the core member Provided ,
The core material is provided in close contact with the inner surface of the through hole of the liquid leakage prevention sheet .

(Smoke agent inlet cap)
As liquid leakage prevention structure of smoke injection port to form a tapered bore open at the upper end to the upper, lower tapered bore is plugging in close contact at the time of non-injection, the adhesion state is released during injection of smoke agent smoke injection cap to cap removal by being is provided.

(Detachable smoke emitting part structure)
The smoke emitting part is detachably provided with respect to the housing.

(Structure of smoke emitting part)
The container in which the smoke emitting part is stored is a transparent container with an open top surface.
The opening on the top of the transparent container is closed by the arrangement of the circuit board.
The through hole of the pair of core material formed in the circuit board, the core material is immersed in fuming agent stored in the container through both ends of the core,
A heater is wound around the horizontally exposed part of the core material located on the upper surface side of the circuit board.
Both ends of the heater are supported and fixed to a pair of terminal members erected on the circuit board and connected to the circuit pattern formed on the circuit board.
The circuit board is provided with a connector that connects the heater to the control unit.
Further, instead of the container, the circuit board is provided with a smoke agent inlet.

(Scale of transparent container)
The transparent container is provided with a predetermined scale indicating the amount of the fuming agent.

(Heater drive control)
The control unit drives and controls the heater so that the smoke concentration in the test space detected by the concentration detector maintains a predetermined smoke concentration according to a predetermined smoke concentration increase rate.

(Smoke agent)
The fuming agent is a water-soluble liquid containing at least one component of propylene glycol, glycerin, dipropylene glycol, tripropylene glycol or glycol.

(Protective frame)
A protection in which a grid-like or mesh-like smoke outlet is formed on the upper surface of the case facing the position of the heater and the core material heated by the heater of the case covering the outside of the portion of the core material heated by the heater and the heater. A frame is provided.

(Case structure of smoke emitting part)
The smoke emitting part is housed in a case that can be attached to and detached from the housing.
Case is composed of upper surface and the case body of box-shaped having an opening, with respect to the case body in a removable case on the box-shaped having an open lower surface,
It is freely removable inside the container and upper case of the smoke emitting part.

(Basic effect)
The present invention, in the housing, and a test space smoke detector is provided to be tested, fuming section for generating smoke to be supplied to the test space, comprising a supplies a smoke test volume smoke In the sensitivity test device for testing the sensitivity of the sensor, the smoke emitting part is a container in which the smoke agent is stored and provided with a smoke agent inlet, and a nonflammable core material in which the smoke agent contained in the container is impregnated. When a heater for generating smoke by heating fuming agent that is impregnated into the core material, and a control unit for generating smoke by heating fuming agent is impregnated in the core by energization of the heater by a predetermined operation Since the container is equipped with a smoke agent liquid leakage prevention structure in the through hole of the core material and the smoke agent injection port, respectively, the smoke agent is stored in the container and impregnated in the nonflammable core material. Since smoke is generated by heating with a heater, it is possible to put a sufficient amount of smoke agent necessary for the sensitivity test in the container, and by preventing the smoke agent from spilling from the container, the container It is possible to carry the sensitivity test device with the smoke-generating material in the container.

(Effect of the liquid leakage prevention cap of the core material)
Further, as the liquid leakage prevention structure through hole of the core member, liquid leakage prevention with an outer diameter and smaller have throttle hole than the outer diameter substantially the same or core material of the core member corresponding to the position of the through hole of the core member cap is provided, the core is squeezed since provided in close contact with the inner surface of the hole, the smoke agent leaking to the outside from the gap between the through hole and the core material of the core material even inclined smoke unit Can be reliably prevented. Furthermore, since the sealed structure of the container can be maintained while the core material is passed through the through hole of the core material, it is not necessary to insert and remove the core material every time the sensitivity test device is moved, so that the labor for each test can be reduced. ..

(Effect of liquid leakage prevention structure of core material by liquid leakage prevention sheet)
In addition, as a liquid leakage prevention structure for the through holes of the core material, a liquid leakage prevention structure in which a through hole that is substantially the same as the outer diameter of the core material or smaller than the outer diameter of the core material is formed corresponding to the position of the through hole of the core material. sheet is provided, core material, since that is provided in close contact with the inner surface of the through hole of the liquid leakage prevention sheet achieves the same effect as the case of liquid leakage prevention cap of the core material mentioned above.

(Effect of smoke agent inlet cap)
Further, as the liquid leakage prevention structure of smoke injection port to form a tapered bore open at the upper end to the upper, lower tapered bore is plugging in close contact at the time of non-injection, injected during close contact of the smoke agent Since the smoke agent inlet cap that opens when the cap is released is provided, the cap can be opened by using a syringe or the like, so that the cap can be easily and easily put in the container without the need to attach or detach the cap. Since the fuming agent can be replenished, it can be easily replenished when the fuming agent is reduced due to use, and the work efficiency can be improved.

(Effect of removable smoke generator structure)
Since the smoke emitting part is detachably provided to the housing, even with the existing sensitivity test device, it is only necessary to detachably provide the smoke emitting part to the housing, and the change of the sensitivity test device is the minimum necessary. The sensitivity test can be performed easily and easily.

(Effect of the structure of the smoke emitting part)
Further, the container smoke unit is accommodated in a transparent container whose upper surface is opened, the opening portion of the upper surface of the transparent container is closed by the arrangement of the circuit board, the through hole of the pair of core material formed on the circuit board , The core material is immersed in the fuming agent stored in the container through both ends of the core material , the heater is wound around the horizontally exposed part of the core material located on the upper surface side of the circuit board, and a pair of terminals erected on the circuit board. Both ends of the heater are supported and fixed to the member and connected to the circuit pattern formed on the circuit board.
The circuit board is provided with a connector for connecting the heater to the control unit, and the circuit board is provided with a smoke agent injection port instead of the container . Therefore, the circuit board functions as a lid of the container and has a core on the circuit board. The smoke-generating portion can be compactly configured by supporting and fixing the heater and the connector portion wound around the material and the core material, and further providing the smoke-generating agent injection port. In addition, a heater is wound around the horizontal portion of the core material exposed on the circuit board, which makes it possible to generate smoke by effectively utilizing the horizontal space.

(Effect of scale of transparent container)
In addition, since the transparent container is provided with a predetermined scale indicating the amount of the fuming agent, it is easy to manage the fuming agent contained in the transparent container by, for example, inserting a memory indicating the upper limit and the lower limit and a scale indicating an appropriate amount. And it can be done easily.

(Effect of heater drive control)
Further, since the control unit drives and controls the heater so that the smoke concentration in the test space detected by the concentration detector maintains a predetermined smoke concentration according to a predetermined smoke concentration increase rate, for example, a drive signal for the heater. When controlling the duty ratio of the heater, the drive signal to the heater is controlled to a large duty ratio exceeding 80%, for example, until the start of smoking because the detection value cannot be obtained from the concentration detector immediately after the heater is energized. When the time can be shortened and then a detection value having a predetermined smoke concentration can be obtained from the concentration detector, the duty ratio decreases as the detection value increases, for example, a duty ratio of 20 to 30%. It keeps smoking and enables efficient sensitivity test work.

(Effect of smoke agent)
In addition, since the smoke-forming agent was a water-soluble liquid containing at least one component of propylene glycol, glycerin, dipropylene glycol, tripropylene glycol, or glycol, simulated smoke close to white was generated by heating and vaporizing with a heater, which is appropriate. The operation of the smoke detector can be confirmed efficiently, and since it is a water-soluble liquid having an inexpensive component, it is possible to reduce the manufacturing cost and operating cost of the sensitivity test device.

(Effect of protective frame)
Further, a grid-like or mesh-like smoke outlet is formed on the upper surface of the case facing the position of the heater and the core material heated by the heater of the case covering the outside of the portion of the core material heated by the heater and the heater. Since the protective frame is provided, it is possible to reliably prevent the heater from being deformed by being touched by a finger or foreign matter from adhering to the heater.

(Effect of the case structure of the smoke emitting part)
Also, smoke unit is housed freely case detachable from the housing, the case includes a case body of box-shaped having an open upper face, on the box-shaped having an open removable lower surface with respect to the case body Since it is composed of a case and is freely removable inside the container of the smoke emitting part and the upper case, by removing the upper case from the case body, the smoking part can be taken out to the outside and the smoking agent can be easily and easily replaced or replenished. it can.

Explanatory drawing which showed embodiment of sensitivity test apparatus in test state of smoke detector Explanatory drawing which showed embodiment of sensitivity test apparatus from the side Explanatory drawing which showed the 1st Embodiment of the smoke emitting part provided in a sensitivity test apparatus. Explanatory drawing showing the internal structure of the smoke emitting part of FIG. Explanatory drawing showing by taking out the liquid leakage prevention cap provided in the smoke emitting part Explanatory drawing showing taking out the smoke agent inlet cap provided in the smoke emitting part Block diagram showing the functional configuration of the control unit provided in the smoke emitting unit Time chart showing duty control of heater drive signal by PWM circuit of FIG. Explanatory drawing which showed the 2nd Embodiment of the smoke emitting part provided in a sensitivity test apparatus from a plane and a side surface. Explanatory drawing which showed the 2nd Embodiment of the smoke emitting part provided in a sensitivity test apparatus from the front. Explanatory drawing which showed the liquid leakage prevention structure provided in the 2nd Embodiment of a sensitivity test apparatus Explanatory drawing which showed the 3rd Embodiment of the smoke emitting part provided in the sensitivity test apparatus. Explanatory drawing which showed other example of connector arrangement in sensitivity test apparatus of 2nd Embodiment Explanatory drawing which showed the 4th Embodiment of the smoke emitting part provided in the sensitivity test apparatus.

[Overview of sensitivity test equipment]
FIG. 1 is an explanatory view showing an embodiment of a sensitivity test device in a test state of a smoke detector, FIG. 1 (A) shows the front surface, and FIG. 1 (B) shows a plane in a state where the operation panel is pulled out. .. Further, FIG. 2 is an explanatory view showing an embodiment of the sensitivity test device from the side surface.

As shown in FIGS. 1 and 2, the sensitivity test apparatus 100 of the present embodiment has a test space 101 inside the housing 102, and is provided on a mounting base 138 arranged inside the housing 102 inside the opening / closing lid 104. The mounting base 142 of the smoke detector 140 to be tested is arranged.

In the lower right corner of the front surface of the sensitivity test device, a smoke emitting portion 10 is arranged so as to be freely pulled out by a handle 20. The smoke emitting unit 10 generates simulated smoke (hereinafter referred to as "smoke") atomized by vaporizing a water-soluble liquid that functions as a smoke emitting agent.

A circulation fan 106 is arranged in the vicinity of the smoke emitting unit 10, and the smoke sent from the smoke generating unit 10 to the test space 101 is sent to the left side by the circulation fan 106. The smoke sent by the circulation fan 106 is sent above the test space 101 by the straightening vane 108, and the smoke detector 140 mounted on the mounting base 142 is located in this upper space, and the smoke concentration of the test space 101 is measured. A concentration detector 112 for detection is installed.

An operation panel 116 having a drawer structure is housed under the front surface of the sensitivity test apparatus 100. As shown in FIG. 1 (B), the operation panel 116 is provided with a power switch 122, and when the power switch 122 is turned on, the power lamp 130 lights up and is specified by the smoke detector 140 mounted on the mounting base 142. The power supply voltage is supplied, and this power supply voltage is displayed on the sensor voltmeter 134.

The sensor supply voltage can be adjusted by the voltage adjustment knob 124. When the smoke supplied to the test space 101 flows into the smoke detector 140 and reaches a predetermined smoke concentration, the smoke detector 140 issues a test alarm and the alarm indicator lamp 132 is turned on.

Further, the smoke concentration detection signal from the concentration detector 112 is displayed on a densitometer 136 using a microampere meter. Since the smoke detector 140 to be tested by the sensitivity test apparatus 100 has a photoelectric type and an ionization type, the densitometer changeover switch 128 is switched according to the type of the smoke detector. The zero point of the densitometer 136 is adjusted by the photoelectric zero point adjustment knob 126 in the case of the photoelectric smoke detector, and is adjusted by the ion zero point adjustment knob 127 in the case of the ionization type smoke detector.

As shown in FIG. 2, the smoke emitting unit 10 houses the smoke emitting mechanism 11 in a box-shaped case, and the smoke emitting mechanism 11 is atomized by heating the smoking agent stored in the container with a heater and vaporizing it. Generates smoke. Further, a control board 96 is arranged in the case, and a control unit 98 is mounted on the control board 96. When the power switch 122 provided on the operation panel 116 of FIG. 1B is turned on, the control unit 98 is mounted. 98 generates smoke by controlling the energization of the heater.

[Structure of smoke emitting part]
3A and 3B are explanatory views showing a first embodiment of a smoke emitting portion provided in the sensitivity test apparatus, FIG. 3A shows a plane, and FIG. 3B shows a side surface. 4A and 4B are explanatory views showing the internal structure of the smoke emitting portion of FIG. 3 , FIG. 4A shows a plane with the case cover removed, and FIG. 4B shows a cross section seen from the side surface.

(Overview of smoking area)
As shown in FIGS. 3 and 4, the smoke emitting mechanism 11 is incorporated in the box-shaped case body 12 opened above the smoke emitting portion 10. The smoke emitting mechanism 11 is provided with a cup-shaped transparent container 24 in which the smoking agent 48 is stored, and the circuit board 22 is adhered and fixed to the upper opening of the transparent container 24 so as to be closed.

A pair of liquid leakage prevention caps 28 are arranged on the circuit board 22, and both ends of the string-shaped core material 26 are passed through the liquid leakage prevention cap 28, and the tip of the core material 26 is stored in the transparent container 24. The smoke agent 48 is sucked up by the capillary phenomenon, and the core material 26 is impregnated with the smoke agent 48.

As the core material 26, nonflammable glass fiber, silica fiber, stainless stranded wire or the like is used. Further, as the fuming agent 48, a water-soluble liquid containing at least one component among components having hydrophilicity and high water retention, for example, glycerin, propylene glycol, etc., which is harmless to the human body is used.

A heater 30 is wound around a horizontally exposed portion of the core material 26 located on the upper surface of the circuit board 22. The heater 30 is a metal wire such as a nichrome wire or a platinum wire. For example, a heater wire having a wire diameter of 0.2 to 0.4 mm is wound around a core material 26 in a coil shape, and the inner diameter of the coil is 1.0 to 3.0 mm. The coil length is 10 mm or less.

The heater 30 is supported by fixing both ends of the coil to a pair of heater support poles 32 standing upright on the circuit board 22 with screws 34, and both ends of the coil are electrically connected to the circuit pattern 36 of the circuit board 22 via the heater support poles 32. It is connected to the. A lead wire 38 is connected to the right end of the circuit pattern 36, and the lead wire 38 is connected to the control board 96 shown in FIG. 2 by a connector 40.

Further, a temperature sensor 44 is arranged on a substrate in the vicinity of the heater 30 supported by the circuit board 22, is connected to the lead wire 38 via the circuit pattern 42, and is connected to the lead wire 38 by the connector 40 of the lead wire 38, as shown in FIG. It is connected to the control board 96 shown.

As shown in FIG. 3A, a smoke discharge port 16 having a rectangular opening is formed in a portion of the case cover 14 located above the smoke generation mechanism 11 housed in the case body 12, and the smoke discharge port 16 is formed. A grid guard 18 is arranged on the 16 in a cross shape to prevent a finger from touching the internal heater 30 to cause deformation, burns, or foreign matter from adhering to the heater 30. The smoke discharge port 16 may be provided with a guard having a coarse mesh structure instead of the grid guard 18.

Further, since the heater 30 is provided inside the case with respect to the smoke discharge port 16, the airflow in the test space does not directly hit the heater 30, and the heater 30 is cooled by the airflow to suppress the generation of smoke. Absent.

Further, the circuit board 22 is provided with a smoke agent injection port cap 46, and by using a syringe or the like, the smoke agent 48 can be injected into the transparent container 24 through the smoke agent injection port cap 46 to be replenished. ing.

Further, a scale 50 indicating the amount of the smoking agent 48 is provided on the side surface of the transparent container 24. The scale 50 of the present embodiment shows an upper limit 50a, a lower limit 50b, an appropriate amount upper limit 50c, and an appropriate amount lower limit 50d. By checking the scale 50, it is easy and easy to manage the smoke agent 48 contained in the transparent container 24. Can be done.

(Liquid leakage prevention cap)
5A and 5B are explanatory views showing a liquid leakage prevention cap provided in the smoke emitting portion taken out, FIG. 5A shows a plane, and FIG. 5B shows a cross section seen from a side surface.

As shown in FIG. 5, the liquid leakage prevention cap 28 is made of rubber, is fitted and fixed in a through hole 52 provided in the circuit board 22, and the core material 26 is passed through the throttle hole 54 of the liquid leakage prevention cap 28. There is. Diameter of throttle hole 54 is smaller than the outer diameter of the core 26, the core material 26 is squeezed becomes close contact by being narrowed down when passing through the holes 54, smoke agent from the transparent container 24 be inclined smoke unit 10 The leakage of 48 to the outside is surely prevented. Further, the hole diameter of the drawing hole 54 may be substantially the same as long as it is not wider than the core material 26.

(Smoke agent inlet cap)
FIG. 6 is an explanatory view showing the smoke agent inlet cap provided in the smoke emitting portion taken out, FIG. 6 (A) shows a flat surface, and FIG. 6 (B) shows a cross section seen from a side surface.

As shown in FIG. 6, the smoke agent injection port cap 46 is formed by fitting a metal cap body 56 into a through hole of a circuit board 22 and closely fixing the cap body 56 with a seal layer 62 such as an adhesive. A rubber cap 58 is incorporated in the inside so as to penetrate up and down. A tapered hole 60 opened at the upper end is formed in the rubber cap 58, and the lower side of the tapered hole 60 is closed in a close contact state.

When injecting the fuming agent 48 into the transparent container 24, the fuming agent 48 is put into a syringe, the injection needle is inserted into the tapered hole 60 of the fuming agent injection port cap 46, and the tip is projected into the transparent container 24. Inject the smoke agent 48 by pushing the plunger of the syringe. When the injection needle is pulled out after the injection of the smoke agent 48 by the syringe, the lower side of the taper hole 60 is in close contact with the closed state and functions as a check valve, so that the liquid leakage of the smoke agent 48 can be surely prevented.

When injecting the fuming agent 48 using such a syringe, it is easy and reliable to inject the required amount of the fuming agent 48 by looking at the scale 50 of the transparent container 24 shown in FIG. 4 (B). Can be done.

(Structure of control unit)
FIG. 7 is a block diagram showing a functional configuration of a control unit provided in the smoke emitting unit. As shown in FIG. 7, when the power switch 122 is turned on, the control unit 98 operates by supplying power to the constant voltage circuit 66 from the power supply unit 64 and receiving the constant voltage power supply from the constant voltage circuit 66. To do. Further, the heater 30 provided in the smoke emitting unit 10 and the temperature sensor 44 are connected to the control unit 98, and further, the concentration detector 112 arranged in the test space is connected.

The control unit 98 includes a feedback circuit 68, a PWM circuit 70, and a heater drive circuit 72. The feedback circuit 68 is provided with an error amplifier 74 and a reference voltage source 76, and the target smoke concentration in the test space according to the target smoke concentration increase rate is set by the reference voltage Vref of the reference voltage source 76.

As a result, the level of the feedback signal E1 output from the error amplifier 74 increases when the detection concentration by the smoke concentration detection signal from the concentration detector 112 is lower than the target smoke concentration by the reference voltage Vref, and the level of the feedback signal E1 is increased from the concentration detector 112. When the detection concentration by the smoke concentration detection signal approaches the target concentration by the reference voltage Vref, the level changes so as to decrease.

The PWM circuit 70 includes a triangular wave generator 78 and a PWM comparator 80. As shown in FIG. 8 (A), the triangular wave generator 78 generates a triangular wave signal E2 that repeats at a predetermined cycle, and the PWM comparator 80 compares the feedback signal E1 and the triangular wave signal E2, and shows in FIG. 8 (B). The indicated PWM signal E3 is output.

The PWM signal E3 has a high duty ratio when the level of the feedback signal E1 is high, and the duty ratio decreases as the level of the feedback signal E1 decreases.

Immediately after the power switch 112 is turned on, no smoke is emitted from the smoke emitting unit 10. Therefore, in order to raise the heater temperature to the smoke emitting temperature, feedback control is not performed for a predetermined period or until smoke is detected. The duty ratio of the PWM signal E3 is set to a high value of, for example, 80% or more, and the heater drive circuit 72 energizes the heater 30 according to the duty ratio of the PWM signal E3 to maintain a high energization amount of the heater 30. The fuming agent 48 impregnated in the core material 26 is heated in a short time and smoke begins to be emitted.

When a predetermined period or smoke is detected, feedback control is started. As the smoke emission unit 10 emits smoke, the smoke concentration detected by the concentration detector 112 begins to increase, which causes the level of the feedback signal E1 to begin to decrease, and the duty ratio of the PWM signal E3 also begins to decrease, which is the target. When the smoke concentration is reached, the duty ratio of the PWM signal E3 is maintained at a value of, for example, 20 to 30%.

Further, the temperature of the smoke emitting unit 10 is monitored by the temperature sensor 44, and when abnormal heating occurs due to energization of the heater 30, when the temperature detected by the temperature sensor 44 exceeds a predetermined threshold temperature, for example, a heater drive circuit. A protective operation for stopping the operation of 72 is performed.

[Test work with sensitivity test equipment]
Next, the sensitivity test of the smoke detector by the sensitivity test device 100 will be described. As shown in FIGS. 1 and 2, when the sensitivity test of the smoke detector is performed by the sensitivity test device 100, the opening / closing lid 104 is opened and internally mounted as shown in the opening / closing lid 104a of FIG. 1 (A). The smoke detector 140 is attached to the base 142 and closed, and in this state, the smoke emitting unit 10 is housed in the housing 102, and the power switch 112 is turned on.

When the power switch 112 is turned on, the control unit 98 shown in FIG. 7 operates, and the core material 26 impregnated with the fuming agent 48 is overheated by energization of the heater 30 by PWM control. Here, the contact portion of the heater 30 with the core material 26 functions as an atomizer, and the water-soluble liquid containing components such as glycerin and propylene glycol impregnated in the core material 26 is vaporized to become smoke, which becomes smoke. It is discharged from the discharge port 16.

The smoke emitted from the smoke emitting unit 10 is emitted to the lower right corner of the test space 101 inside the housing 102, and is sent to the upper space of the test space 101 through the rectifying plate 108 by the circulation fan 106 to increase the smoke concentration. Let me.

Therefore, when smoke flows into the smoke detector 140, the smoke detector 140 issues a warning, and the alarm indicator lamp 132 lights up, the sensitivity is determined by whether or not the display of the densitometer 136 at that time is within a predetermined range. To check.

[Second embodiment of smoke emitting part]
9A and 9B are explanatory views showing a second embodiment of a smoke emitting portion provided in the sensitivity test apparatus from a plane and a side surface, FIG. 9A shows a plane, and FIG. 9B shows a side surface. FIG. 10 is an explanatory view showing the second embodiment of the smoke emitting portion provided in the sensitivity test device from the front, and FIG. 11 is an explanatory view showing the liquid leakage prevention structure provided in the second embodiment of the sensitivity test device. ..

As shown in FIGS. 9 and 10, the smoke emitting portion 10 of the present embodiment is arranged on the upper case 14a side which is detachably provided in the upper opening of the box-shaped case main body 12. An outer frame portion 13a is formed on the front side from the upper opening edge of the case body 12, and a corresponding outer frame portion 13b is formed on the front side from the lower opening edge of the upper case 14a. The upper case 14a is placed on the opening of the twelve, and the outer frame portions 13a and 13b are attached to each other and both are fixed by the screws 15. Such a fixing structure of the upper case 14a with respect to the main body case 12 is similarly provided on the rear end side of the case main body 12.

Further, as shown in FIG. 10B, an inner frame portion 13c is formed in the lower opening of the upper case 14a, and a smoke emitting mechanism 11 is incorporated in the lower side of the inner frame portion 13c. The smoke emitting mechanism 11 includes a transparent container 24 in which the smoke emitting agent 48 is stored, a rectangular rubber sheet 25 that functions as a liquid leakage prevention sheet, and a circuit board 22 provided with a core material 26 and a heater 30.

A rectangular flange portion is formed in the upper opening of the cup-shaped storage portion of the transparent container 24, and a circuit board 22 is formed on the rectangular flange portion of the transparent container 24 via a rectangular rubber sheet 25 that functions as a liquid leakage prevention sheet. The transparent container 24 is arranged and fixed by screwing the screws 27 at four points into the screw holes of the inner frame portion 13c of the upper case 12a via the rubber sheet 25 and the circuit board 22 in between. The rubber sheet 25 is adhered to the back surface of the circuit board 22 with an adhesive or double-sided tape.

As shown in FIG. 11, a through hole 25 a is formed in the rubber sheet 25 adhered to the lower side of the circuit board 22, and a string-shaped core is formed with respect to the through hole 25 a through the opening hole 22 a of the circuit board 22. Through both ends of the material 26, the tip of the core material 26 is immersed in the smoke agent 48 stored in the transparent container 24, the smoke agent 48 is sucked up by the capillary phenomenon, and the core material 26 is impregnated with the smoke agent 48.

Here, the hole diameter of the through hole 25a of the core material 26 provided in the rubber sheet 25 is smaller than the outer diameter of the core material 26, and the core material 26 is narrowed down when passing through the through hole 25a to be in a close contact state. As a result, a structure for preventing liquid leakage of the fuming agent is provided in the through hole 25a of the core material 26.

A heater 30 is wound around a horizontally exposed portion of the core material 26 located on the upper surface of the circuit board 22, and the heater 30 is supported by fixing both ends of the coil to a pair of heater support poles 32 standing on the circuit board 22 with screws 34. Both ends of the coil are electrically connected to the circuit pattern of the circuit board 22 via the heater support pole 32, the lead wire 38 is connected to the right end of the circuit pattern, and the lead wire 38 is connected to the control board 96 by the connector 40. It is connected to the. Further, the hole diameter of the through hole 25a of the core material 26 may be substantially the same as long as it is not wider than the core material 26.

Further, a temperature sensor 44 is arranged on a board in the vicinity of the heater 30 supported by the circuit board 22, is connected to the lead wire 38 via the circuit pattern 42, and is connected to the lead wire 38 by the connector 40 of the lead wire 38. It is connected to the.

As shown in FIG. 9A, a smoke emission port 16 having a rectangular opening is formed in a portion of the upper case 14a located above the smoke generation mechanism 11 housed in the case body 12, and the smoke emission port 16 is formed. The opening size is such that fingers cannot enter. The smoke opening 16 may be provided with a guard having a lattice structure or a mesh structure.

When the smoke-generating agent 48 of the transparent container 24 is replaced or replenished in the present embodiment, when the screw 15 is loosened and the upper case 14a is removed from the case body 12, the smoke-generating agent fixed to the inner frame portion 13c of the upper case 14a is smoked. The mechanism 11 can be taken out, the screw 27 is loosened, the transparent container 24 is removed, and the smoke agent 48 is replaced or replenished.

Here, also for this embodiment, an opening hole for inserting the needle of the syringe structure of smoke injection cap 46 shown provided on the circuit board 22, the upper case 14a that is relative to the smoke agent inlet cap 46 in FIG. 6 it may be the formation and structure of the.

[Third embodiment of smoke emitting part]
12A and 12B are explanatory views showing a third embodiment of a smoke emitting part provided in the sensitivity test apparatus, FIG. 12A shows a flat surface, and FIG. 12B shows a smoke emitting storage part and a smoke generating agent inlet cap. The removed plane is shown, and FIG. 12C shows a cross section seen from the side surface.

As shown in FIG. 12, the present embodiment shows a smoke emitting mechanism 11 housed in the case of the smoke emitting unit 10, and the smoke emitting mechanism 11 is provided with a box-shaped transparent container 24 in which the smoking agent 48 is stored. A cylindrical smoke storage unit 84 is arranged and fixed on the upper part of the transparent container 24.

Inside the smoke generation storage portion 84, a liquid leakage prevention cap 28 is attached to a through hole formed on the upper surface of the transparent container 24, and a rod-shaped core material 26 is passed through a throttle hole 54 of the liquid leakage prevention cap 28 to make a transparent container at the lower end. The heater 30 is wound around a vertically exposed portion of the core material 26 taken out from the upper surface of the transparent container 24 by being immersed in the smoke generating agent 48 stored in the 24.

Both ends of the heater 30 are connected to connectors 40 fixed to the side wall of the smoke emitting storage portion 84. Connector 40 is composed of freely plug portion 40b removably and outlet portion 40a serving as a stationary side, the heater 30 is connected to the outlet portion 40a, the lead wire 38 from the plug portion 40b connected to the control board 96 shown in FIG. 2 Has been done.

A smoke emission port 86 is opened in the upper part of the smoke generation storage unit 84 in which an atomizer composed of a heater 30 wound around the core material 26 is housed, and a grid guard 88 is arranged in the smoke emission port 86. This prevents the internal heater 30 from being deformed by a finger touching it or from adhering to foreign matter. The smoke discharge port 86 may be provided with a guard having a coarse mesh structure instead of the grid guard 88.

Further, a smoke agent injection port cap 46 is arranged on the upper surface of the transparent container 24. The smoke agent inlet cap 46 is fixed by screwing the cap 46b into the injection port 46a integrally formed with the transparent container 24. When the smoke agent 48 is to be earned, the cap 46b is removed and the smoke agent is emitted from the injection port 46a. Inject 48. As smoke agent inlet cap 46 of the present embodiment, it may be provided a structure that does not require detachment of the cap shown in FIG.

Further, a scale 50 indicating the amount of the fuming agent 48 is provided on the side surface of the transparent container 24 to indicate the upper limit 50a, the lower limit 50b, the appropriate amount upper limit 50c and the appropriate amount lower limit 50d, and the fuming agent contained in the transparent container 24. The management of 48 can be performed easily and easily. Other configurations and functions are basically the same as those of the first embodiment shown in FIGS. 1 to 8.

In the smoke emitting part of the present embodiment, the capacity of the transparent container 24 can be increased, and the frequency of replenishing the smoking agent 48 can be reduced.

FIG. 13 is an explanatory diagram showing another example of the connector arrangement in the sensitivity test apparatus of the third embodiment.

In the embodiment of FIG. 13A, the connector portion 40 is arranged on the upper surface of the transparent container 24 which is the bottom side of the smoke generation storage portion 84. The connector 40 is composed of an outlet portion 40a on the fixed side and a detachable plug portion 40b, and the outlet portion 40a is located in a notch portion fixed to the upper surface of the transparent container 24 and formed in the smoke generation storage portion 84, and is an outlet. The lead wire 41 drawn from the portion 40a is connected to the heater 30. From the plug portion 40b leads 38 are pulled out and connected to the control board 96 shown in FIG.

In the embodiment of FIG. 13B, the connector 40 is arranged on the upper surface of the transparent container 24 near the smoke emitting storage portion 84. That is, the outlet portion 40a of the outlet 40 is fixed to the upper surface of the transparent container 24, the lead wire 41 drawn out from the outlet portion 40 is connected to the heater 30 via the smoke generation storage portion 84, and the lead wire 38 from the plug portion 40b. It is drawn, and is connected to the control board 96 shown in FIG.

By arranging the connector 40 on the upper surface of the transparent container 24 in this way, the plug portion 40b can be easily and easily attached to and detached from the outlet portion 40a, and the structure can be simplified by separating it from the smoke emitting storage portion 84.

[Fourth Embodiment of smoke emitting part]
14A and 14B are explanatory views showing a fourth embodiment of a smoke emitting portion provided in the sensitivity test apparatus, FIG. 14A shows a plane, and FIG. 14B shows a cross section seen from a side surface.

As shown in FIG. 14, the present embodiment shows a smoke emitting mechanism 11 housed in the case of the smoke emitting unit 10, and the smoke emitting mechanism 11 is provided with a box-shaped transparent container 24 in which the smoking agent 48 is stored. Similar to the embodiment of FIG. 12, a cylindrical smoke storage unit 90 is arranged and fixed on the upper portion of the transparent container 24.

A pair of liquid leakage prevention caps 28 are arranged inside the smoke generation storage unit 90, and both ends of the string-shaped core material 26 are passed through the liquid leakage prevention cap 28, and the tip of the core material 26 is stored in the transparent container 24. The fuming agent 48 is immersed in the fuming agent 48, sucked up by the capillary phenomenon, and the core material 26 is impregnated with the fuming agent 48.

The heater 30 is wound around the horizontally exposed portion of the core material 26 located on the upper surface of the transparent container 24, and both ends of the heater 30 are connected to the connector 40 fixed to the side wall of the smoke emitting storage portion 90, and the connector 40 the lead wire 38 is connected to the control board 96 shown in FIG.

A smoke emission port 92 is opened in the upper part of the smoke generation storage unit 90 in which an atomizer composed of a heater 30 wound around the core material 26 is housed, and a grid guard 94 is arranged in the smoke emission port 92. This prevents the internal heater 30 from being deformed by a finger touching it or from adhering to foreign matter. The smoke discharge port 92 may be provided with a guard having a coarse mesh structure instead of the grid guard 94.

A smoke agent injection port cap 46 is arranged on the upper surface of the transparent container 24, and the cap 46b is screwed and fixed to the injection port 46a integrally formed with the transparent container 24. As smoke agent inlet cap 46 of the present embodiment, it may be provided a structure that does not require detachment of the cap shown in FIG.

Further, a scale 50 indicating the amount of the fuming agent 48 is provided on the side surface of the transparent container 24 to indicate the upper limit 50a, the lower limit 50b, the appropriate amount upper limit 50c and the appropriate amount lower limit 50d, and the fuming agent contained in the transparent container 24. The management of 48 can be performed easily and easily. Other configurations and functions are basically the same as those of the first embodiment shown in FIGS. 1 to 8.

The smoke emitting unit of the present embodiment is suitable when the sensitivity test device 100 shown in FIG. 1 is provided with the smoke emitting unit 10 and there is a space in the housing 102 in the height direction.

Further, the connector 40 may be arranged on the upper surface side of the transparent container 24 separately from the smoke emitting storage portion 90, as shown in FIG.

[Modification of the present invention]
(Control unit)
In the above embodiment, the amount of electricity supplied to the heater is controlled by PWM control, but the present invention is not limited to this, and voltage control or current control may be used.

(Smoke agent)
Further, the fuming agent may be mixed with a thickening additive. This makes it possible to further prevent the fuming agent from leaking from the container.

(Other)
Further, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

10: Smoke generator 11: Smoke generator 12: Case body 14: Case cover 16, 86, 92: Smoke outlet 18, 88, 94: Lattice guard 20: Handle 22: Circuit board 24: Transparent container 25: Rubber sheet 26: Core material 28: Liquid leakage prevention cap 30: Heater 32: Heater support pole 34: Screw 36, 42: Circuit pattern 38, 41: Lead wire 40: Connector 40a: Outlet part 40b: Plug part 44: Temperature sensor 46: Smoke generator Injection cap 48: Smoke generator 50: Scale 52: Through hole 54: Squeeze hole 56: Cap body 58: Rubber cap 60: Tapered hole 62: Seal layer 64: Power supply unit 66: Constant voltage circuit 68: Feedback circuit 70: PWM Circuit 72: Heater drive circuit 74: Error amplifier 76: Reference voltage source 78: Triangular wave generator 80: PWM comparator
84 , 90: Smoke storage unit 100: Sensitivity test device 101: Test space 102: Housing 104: Open / close lid 106: Circulation fan 108: Rectifier plate 112: Concentration detector 116: Operation panel 122: Power switch 124: Voltage adjustment knob 126: Photoelectric zero adjustment knob 127: Ion zero adjustment knob 128: Densitometer changeover switch 130: Power light 132: Alarm indicator light 134: Sensor voltmeter 136: Densitometer 140: Smoke detector 142: Mounting base

Claims (11)

In the housing ,
A test space equipped with a smoke detector to be tested ,
A smoke generator that generates smoke to supply to the test space,
With
In a sensitivity test apparatus that supplies the smoke to the test space and tests the sensitivity of the smoke detector.
The smoke emitting part
A container that stores smoke agents and has a smoke agent inlet,
A nonflammable core material contained in the container and impregnated with the fuming agent,
A heater for generating the smoke and heat the smoke agent that is impregnated into the core material,
A control unit that heats the flue gas impregnated in the core material by energizing the heater by a predetermined operation to generate smoke.
Consists of
The container is a sensitivity test apparatus characterized in that the through hole of the core material and the smoke agent injection port are each provided with a structure for preventing liquid leakage of the smoke agent.
In the sensitivity test apparatus according to claim 1,
As liquid leakage prevention structure through holes of the core material, with a small yet throttle hole than the outer diameter of substantially the same or the core of the core material corresponds to the position of the through hole of the core liquid A leak prevention cap is provided ,
The core material is sensitive test device being characterized in that provided in close contact with the inner surface of the aperture hole.
In the sensitivity test apparatus according to claim 1,
As a liquid leakage prevention structure for the through hole of the core material, a liquid in which a through hole corresponding to the position of the through hole of the core material is formed so as to be substantially the same as the outer diameter of the core material or smaller than the outer diameter of the core material. A leak prevention sheet is provided ,
The sensitivity test apparatus, wherein the core material is provided in close contact with the inner surface of the through hole of the liquid leakage prevention sheet.
In the sensitivity test apparatus according to any one of claims 1 to 3,
As liquid leakage prevention structure of the smoke agent inlet, to form a tapered bore open at the upper end to the upper, lower tapered bore is plugging in close contact during non-injection, the adhesion during the injection of the smoke agent A sensitivity test device provided with a smoke agent inlet cap that opens when the state is released.
In the sensitivity test apparatus according to any one of claims 1 to 4.
A sensitivity test apparatus characterized in that the smoke emitting portion is detachably provided with respect to the housing.
In the sensitivity test apparatus according to any one of claims 1 to 5.
The container in which the smoke emitting portion is housed is a transparent container having an open upper surface.
The opening on the upper surface of the transparent container is closed by the arrangement of the circuit board.
Wherein the through hole of the pair of core material formed in the circuit board, the core material is immersed in the smoke agent housed in the container through both ends of the core material,
The heater is wound around a horizontally exposed portion of the core material located on the upper surface side of the circuit board.
Both ends of the heater are supported and fixed to a pair of terminal members erected on the circuit board and connected to a circuit pattern formed on the circuit board.
The circuit board is provided with a connector portion for connecting the heater to the control portion.
Further, the sensitivity test apparatus is characterized in that the circuit board is provided with the smoke agent injection port instead of the container.
In the sensitivity test apparatus according to claim 6,
A sensitivity test apparatus characterized in that the transparent container is provided with a predetermined scale indicating the amount of the fuming agent.
In the sensitivity test apparatus according to any one of claims 1 to 7.
The control unit drives and controls the heater so that the smoke concentration in the test space detected by the concentration detector maintains a predetermined smoke concentration according to a predetermined smoke concentration increase rate. ..
In the sensitivity test apparatus according to any one of claims 1 to 8.
The sensitivity test apparatus, wherein the fuming agent is a water-soluble liquid containing at least one component of propylene glycol, glycerin, dipropylene glycol, tripropylene glycol, or glycol.
In the sensitivity test apparatus according to any one of claims 1 to 9.
Release lattice or net-like smoke upper surface opposing the case the position of the core material to be heated by the heater and the heater case for covering the outer part of the core material to be heated by the heater and the heater A sensitivity test apparatus characterized in that a protective frame having an outlet is provided.
In the sensitivity test apparatus according to any one of claims 1 to 10.
The smoke emitting part is housed in a case that can be attached to and detached from the housing.
The case is composed of a case body of box-shaped having an open upper face, on the box-shaped having an open removable bottom surface with respect to the casing main body case,
A sensitivity test apparatus characterized in that the container of the smoke emitting portion is removably arranged inside the upper case.

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