JP2010009225A - Smoke sensor inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform high-accuracy inspection by allowing efficient and stable inflow of inspecting smoke into a smoke sensor without being affected by a flow of air by a simple configuration, in a smoke sensor inspection device. <P>SOLUTION: The smoke sensor inspection device 1 is a device making smoke particles flow into an inspection tank 2 and inspecting performance of the smoke sensor 3 disposed inside the inspection tank 2, includes a smoke generator 4 generating the smoke inside the inspection tank 2 and an electrode E for applying an electric field to the smoke particles generated and charged by the smoke generator 4, increases flow speed of the smoke particles by the electric field generated by the electrode E, and makes the smoke particles flow into the smoke sensor 3. The smoke sensor inspection device 1 also includes a smoke density sensor S detecting smoke density inside the inspection tank 2, and controls voltage applied to the electrode E according to a value of the smoke density detected by the smoke density sensor S. Thereby, because the flow speed of the charged smoke particles is increased by the electric field, only the inspecting smoke particles can be made to flow into the smoke sensor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an inspection apparatus for inspecting a smoke detector.

Conventional smoke detector inspection equipment that inspects the sensitivity characteristics of smoke detectors by circulating smoke at a constant concentration in a rotating air passage in the inspection tank, improves the inspection accuracy by making the smoke concentration and wind speed more stable. Efforts are being made. For example, a smoke generation unit, a plurality of cross flow fans, a rectifying plate, and a plurality of wind speed sensors are provided in an inspection tank that blows and circulates smoke, and a plurality of smoke flow paths are provided by the rectifying plate corresponding to each cross flow fan. There is known a smoke detector inspection apparatus in which the wind speed sensor is arranged corresponding to each smoke flow path and each cross flow fan is controlled by detecting the wind speed (for example, Patent Documents) 1).
JP 11-185182 A

  However, in the smoke detector inspection apparatus as shown in Patent Document 1 described above, smoke is circulated by blowing air from a cross flow fan, so that the air around the smoke detector flows into the smoke detector together with the smoke. There is a problem that turbulent flow is generated in the vicinity of the detector, and the turbulent flow reduces the inflow property of smoke.

  The present invention solves the above-mentioned problems, and with a simple configuration, it is possible to efficiently and stably flow inspection smoke into a smoke detector without being affected by the air flow. An object of the present invention is to provide a smoke detector inspection device that can be inspected.

  In order to achieve the above object, the invention of claim 1 is directed to a smoke detector inspection apparatus for inspecting the performance of a smoke detector disposed in an inspection tank by flowing smoke particles in the inspection tank. A smoke generator for generating smoke and an electrode for applying an electric field to the charged smoke particles generated by the smoke generator, and detecting the smoke particles by increasing the flow velocity of the smoke particles by the electric field. To flow into the vessel.

  A second aspect of the present invention is the smoke detector inspection apparatus according to the first aspect, further comprising a smoke concentration sensor for detecting a smoke concentration in the inspection tank, and the smoke detector according to a value of the smoke concentration detected by the sensor. The voltage applied to the electrode is controlled.

  According to a third aspect of the present invention, in the smoke detector inspection device according to the first or second aspect, a plurality of the electrodes are arranged along the movement direction of the smoke particles in the inspection tank, and a voltage is applied. The electrodes to be switched are sequentially switched so as to increase the flow velocity of the smoke particles.

  According to a fourth aspect of the present invention, in the smoke detector inspection apparatus according to the first or second aspect, the electrode is disposed in the vicinity of the smoke inlet of the smoke detector.

  According to a fifth aspect of the present invention, in the smoke sensor inspection apparatus according to any one of the first to fourth aspects, a fan for stirring the smoke is provided in the inspection tank.

  According to the invention of claim 1, since the flow velocity of the charged smoke particles is increased by the electric field, only the smoke particles for inspection are selectively and stably stabilized without being affected by the air flow. It is possible to inject the gas into the gas and to make an inspection with high accuracy.

  According to the invention of claim 2, by controlling the electric field intensity according to the smoke density, it is possible to control to keep the smoke density flowing into the smoke detector constant, so that an accurate inspection can be performed.

  According to the invention of claim 3, since the flow direction and flow velocity of the smoke particles can be controlled by a plurality of arranged electrodes, the flow path loss can be suppressed lower than when a rectifying plate or the like is used, and the smoke for inspection can be reduced. It is possible to efficiently and stably flow into the smoke detector, and an accurate inspection can be performed.

  According to the invention of claim 4, smoke particles can be guided more directly and efficiently and stably flow into the smoke detector. In addition, since the electrode is disposed only around the smoke detector, the smoke detector inspection apparatus can be miniaturized.

  According to the invention of claim 5, by stirring the smoke, smoke having a uniform concentration can be supplied to the smoke detector, and a stable and accurate inspection can be performed.

(First embodiment)
A smoke detector inspection apparatus according to the first embodiment will be described with reference to FIGS. 1 and 2. The smoke detector inspection device 1 is a device for injecting smoke particles into the inspection tank 2 and inspecting the performance of the smoke detector 3 disposed in the inspection tank 2, and generating smoke in the inspection tank 2. And an electrode E for applying an electric field to the charged smoke particles generated by the smoke generator 4, and the flow rate of the smoke particles is increased by the electric field generated by the electrode E, so that the smoke particles are moved to the smoke detector 3. It is comprised so that it may flow into. The smoke detector inspection device 1 also includes a smoke concentration sensor S that detects the smoke concentration in the inspection tank 2, and controls the voltage applied to the electrode E in accordance with the smoke concentration value detected by the smoke concentration sensor S. Is configured to do.

  More specifically, the inspection tank 2 is a substantially rectangular parallelepiped container installed horizontally, and is vertically divided by a rectangular partition plate 20 provided horizontally in the center of the inside. In the inspection tank 2, smoke consisting of smoke particles flows in one direction. The flow path of the smoke particles is from right to left above the partition plate 20, from top to bottom at the left end of the partition plate 20, from left to right below the partition plate 20 in the arrangement of FIG. It is set to counterclockwise from the bottom to the top at the right end of.

  The upper space partitioned by the partition plate 20 is an inspection room 21, and the smoke detector 3 is disposed on the ceiling portion with the smoke detector 30 projecting downward, and the smoke detector 3 faces the partition plate 20. The smoke density sensor S is arranged at the position of. As the smoke density sensor S, a smoke sensor 3 calibrated in advance can be used. The smoke density sensor S can also be configured using a light emitting unit that constantly generates constant light and a light receiving unit that receives the light.

  On the right side of the partition plate 20, there is provided a cross flow fan 22 used under a low wind speed condition that does not generate a turbulent flow having a rotation axis in the depth direction of the drawing. The cross flow fan 22 can accurately control the wind speed orthogonal to the rotation axis.

  An electrode E is provided on the left side of the examination chamber 21 so as to cross the flow path. The electrode E is formed so as not to hinder the flow of air and smoke particles, and is formed in a net shape or a slit shape by a conductor, for example.

  A lower space of the partition plate 20 is a smoke generation chamber, and a rectifying plate 23 is provided on the left side, and a smoke generator 4 is provided on the right side of the center. The smoke generator 4 is an apparatus that causes an arbitrary number of pieces of paper to come into contact with a high-temperature heater to generate smoke, or generate paraffin mist particles instead of smoke particles. It is known that smoke particles generated by the smoke generator 4 or particles forming paraffin mist instead of smoke particles (hereinafter collectively referred to as smoke particles) are generally generated by being negatively charged when the particles are generated. ing.

  The positive electrode of the DC power source 10 is connected to the electrode E. The negative electrode of the DC power supply 10 is grounded to the casing of the inspection tank 2. In this embodiment, the negative electrode is grounded to the smoke generator 4. A dedicated negative electrode may be arranged around the smoke flow path separately from the housing, and the negative electrode of the DC power supply 10 may be connected to the negative electrode.

  Next, the operation of the smoke detector inspection apparatus 1 configured as described above will be described. Smoke particles are generated by the smoke generator 4 in a state where a positive voltage is applied to the electrode E to generate an electric field in the vertical direction of the electrode E and the cross flow fan 22 is operated. The smoke particles flow into the examination room 21 along the air flow. Then, among the smoke particles, the negatively charged smoke particles are subjected to electrostatic attraction from the electrode E disposed in front (downstream side) of the smoke detector 3 to increase the flow velocity, and the random smoke particles are randomized. The moving direction is aligned with the direction of the electrode E.

  Further, according to the value of the smoke density detected by the smoke density sensor S, for example, when the smoke density is low, the voltage applied to the electrode E is increased to attract more smoke particles, thereby increasing the smoke density. To control.

  As described above, according to the smoke detector inspection apparatus 1 of the present embodiment, the flow velocity of the charged smoke particles can be increased by the electric field, so that the air turbulence can be achieved without depending on the air flow. Only the smoke particles for inspection can be selectively and efficiently allowed to flow into the smoke detector 3 without being affected by the above. Smoke particles can be efficiently flowed into the smoke detector 3 under a low wind speed condition by suppressing the air flow rate, and an accurate inspection is possible.

  Further, by changing the electric field intensity by the electrode E according to the smoke detection density, it is possible to control the smoke density flowing into the smoke detector 3 to be constant, so that a stable and accurate inspection can be performed.

(Second Embodiment)
A smoke detector inspection apparatus according to the second embodiment will be described with reference to FIG. The smoke detector inspection device 1 in the present embodiment is one in which the electrode E in the first embodiment is arranged on the front side (upstream side) of the smoke detector 3, and the other points are the same as those in the first embodiment. It is the same.

  In the present embodiment, the smoke particles are configured to flow into the smoke detector 3 after passing through the electrode E. In order to operate such an electrode E effectively, a voltage is applied to the electrode E when accelerating the upstream smoke particles so that the smoke particles are not adsorbed by the electrode E when the smoke particles pass through the electrode E. The power supply 10 may be turned off. Further, by intermittently operating the smoke generator 4, a group of smoke particles is generated in a pulsed manner, and the voltage applied to the electrode E is turned on and off in synchronization with the movement of the group of smoke particles. It may be.

(Third embodiment)
A smoke detector inspection apparatus according to the third embodiment will be described with reference to FIG. In addition to the electrode E and the power supply 10 in the first embodiment, a plurality of smoke detector inspection devices 1 in the present embodiment are arranged on the upstream side of the smoke detector 3 along the direction of movement of the smoke particles in the inspection tank 2. Provided with electrodes e1,..., En (generally referred to as electrodes e) and a changeover switch 12 for sequentially switching the voltage applied to these electrodes e so as to increase the flow velocity of smoke particles. This point is the same as in the first embodiment. In addition, although the crossflow fan 22 is provided in the position of the downstream of the electrode E, the difference with the position in 1st Embodiment is not essential.

  The electrodes e1,..., En are arranged in this order from the upstream side along the flow path through which the smoke particles flow so as not to disturb the flow of the smoke particles. Smoke particles generated by the smoke generator 4 are accelerated by receiving electrostatic attraction from the front electrode e before the movement. In this case, it is only necessary to turn off the voltage of the electrode e in a predetermined range behind so as not to decelerate the smoke particles being accelerated. Also in this case, the smoke generator 4 is intermittently operated to generate a group of smoke particles in a pulsed manner and is applied to the electrode e by the changeover switch 12 in synchronization with the movement of the group of smoke particles. The voltage may be turned on and off one after another. Alternatively, so-called bunching may be performed in which smoke particles are forcibly densified by switching the electrode e to which a voltage is applied to form a smoke particle group.

  According to the smoke detector inspection device of the present embodiment, the flow direction of smoke particles and the control to increase the flow velocity can be controlled by the plurality of electrodes e1,. Compared to the case of using a plate or the like, the flow path loss can be kept low, and the smoke for inspection can be efficiently and stably flowed into the smoke detector 3 so that accurate inspection can be performed efficiently.

(Fourth embodiment)
A smoke detector inspection apparatus according to the fourth embodiment will be described with reference to FIGS. As shown in FIG. 5, the inspection tank 2 of the smoke detector inspection apparatus 1 in the present embodiment has a vertical configuration having a multistage cylindrical shape, and includes a smoke generator (not shown) in the lower part inside. The upper end of the inspection tank 2 terminates on the surface of the smoke detector 3 via a sealing material 25 such as an O-ring. The smoke detector 3 is arranged in such a manner that a smoke detector 30 having a plurality of smoke inlets 5 is desired in the inspection chamber 21 of the inspection tank 2. Further, as shown in FIGS. 5 and 6, a plurality of electrodes E are disposed in the vicinity of the smoke inlet 5. Each electrode E is connected to a common power supply 10 and is applied with a positive voltage.

  The smoke sensing unit 30 includes an internal space formed by the light shielding wall 51 and a large number of smoke inlets 5 deflected from the central direction. In the internal space, a light emitting unit 6 and a light receiving unit 7 are provided, and the smoke particle concentration is detected by scattering attenuation by smoke particles. The outer shape of the smoke sensing unit 30 is shown in FIGS. In the upper part of the smoke detection unit 30, an opening 31 for introducing a wiring is opened.

  Smoke particles flowing from the lower part A of the inspection tank 2 enter the inside of the smoke sensing unit 30 through the smoke inlet 5 and flow out upward B from the upper opening 31. Therefore, by applying a positive voltage to the electrode E, the smoke particles are attracted to the charged smoke particles independently of the air flow under a low wind speed condition where the air flow rate is suppressed and turbulence does not occur. Can efficiently flow into the smoke sensing unit 30. That is, according to the smoke detector inspection apparatus 1 of the present embodiment, the inspection smoke can be guided more directly to each smoke inlet 5 of the smoke detector 3, so that it is obstructed by air turbulence. Smoke can be efficiently and stably flowed into the smoke detector 3 without any trouble. Further, since the electrode E can be disposed only around the smoke detector 3, the smoke detector inspection apparatus 1 can be downsized.

(Fifth embodiment)
A smoke detector inspection apparatus according to the fifth embodiment will be described with reference to FIG. The smoke detector inspection device 1 in the present embodiment is an arrangement in which the electrode e (a general term for the electrodes e1,..., En) in the third embodiment is arranged so as to block the smoke flow path. This is the same as in the third embodiment. However, the electrode e is formed in, for example, a net-like shape having a coarse mesh so as not to prevent the movement of smoke particles. The control of applying a voltage to each electrode e using the changeover switch 12 is the same as in the third embodiment. According to the smoke detector inspection apparatus 1 of the present embodiment, smoke particles can pass vertically through the electrodes e, so that smoke particles are more smoked than the smoke detector inspection apparatus 1 of the third embodiment. There is an effect that acceleration can be performed along the flow path.

(Sixth embodiment)
A smoke detector inspection apparatus according to the sixth embodiment will be described with reference to FIG. In the first embodiment, the smoke detector inspecting apparatus 1 includes a fan 6 for agitating smoke upstream of the smoke generator 4 and forcibly releases smoke particles immediately downstream of the smoke generator 4. The electronic shower device 7 is provided for charging, and the other points are the same as in the third embodiment.

  As the stirring fan 6, a propeller fan can be suitably used. The propeller fan can spread the smoke generated by the smoke generator 4 to a uniform concentration in the smoke flow path by generating a wind speed in the direction of the rotation axis by the propeller. That is, by stirring the smoke, smoke having a uniform concentration can be supplied to the smoke detector 3, and a stable and accurate inspection can be performed.

  Moreover, since the electronic shower apparatus 7 forcibly improves the charging rate of the smoke particles, the effect of the electrode E can be further enhanced.

  The present invention is not limited to the above-described configuration, and various modifications can be made. For example, the configurations of the above-described embodiments can be combined with each other.

Sectional drawing of the smoke detector inspection apparatus which concerns on the 1st Embodiment of this invention. The internal perspective view of an apparatus same as the above. Sectional drawing of the smoke detector inspection apparatus which concerns on 2nd Embodiment. Sectional drawing of the smoke detector inspection apparatus which concerns on 3rd Embodiment. Sectional drawing of the smoke detector inspection apparatus which concerns on 4th Embodiment. Sectional drawing of an apparatus same as the above. (A) is a side view of a smoke detector to be inspected by the apparatus, and (b) is a perspective view of a smoke detector of the smoke detector. Sectional drawing of the smoke detector inspection apparatus which concerns on 5th Embodiment. Sectional drawing of the smoke detector inspection apparatus which concerns on 6th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Smoke detector inspection apparatus 2 Inspection tank 3 Smoke detector 4 Smoke generator 5 Smoke inlet 6 Propeller fan E, e1-en Electrode S Smoke density sensor

Claims (5)

In a smoke detector inspection apparatus for inspecting the performance of a smoke detector disposed in the inspection tank by flowing smoke particles into the inspection tank,
A smoke generator for generating smoke in the inspection tank;
An electrode for applying an electric field to smoke particles generated and charged by the smoke generator,
An apparatus for inspecting a smoke detector, wherein the smoke particles flow into the smoke detector by increasing the flow velocity of the smoke particles by the electric field.   The smoke according to claim 1, further comprising a smoke concentration sensor for detecting a smoke concentration in the inspection tank, wherein a voltage applied to the electrode is controlled in accordance with a value of the smoke concentration detected by the sensor. Sensor inspection device.   2. The electrode according to claim 1, wherein a plurality of the electrodes are arranged along a moving direction of the smoke particles in the inspection tank, and the electrodes to which the voltage is applied are sequentially switched so that the flow velocity of the smoke particles is increased. 2. The smoke detector inspection device according to 2.   The smoke sensor inspection device according to claim 1, wherein the electrode is disposed in proximity to a smoke inlet of the smoke sensor.   The smoke detector inspection device according to any one of claims 1 to 4, wherein a fan for stirring the smoke is provided in the inspection tank.

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