JP5820136B2 - Smoke tester - Google Patents

Description

  The present invention relates to a smoke tester used for a smoke sensor smoke test.

The smoke detector smoking test is to supply smoke or pseudo smoke to the smoke detector and perform an operation test thereof. As an example of a smoke tester used for such a smoke test, Patent Document 1 discloses a tester for a smoke detector.
The smoke detector tester disclosed in Patent Document 1 includes a gas cylinder filled with a test gas, an opening / closing part that opens and closes the gas cylinder, a smoke storage part that holds the opening / closing part, and a gas discharged from the gas cylinder. And a smoke sending section that sends the smoke to the vicinity of the intake port of the smoke detector (see paragraph [0012] of Patent Document 1).

Japanese Patent Laid-Open No. 9-305874

In Patent Document 1, there is no particular description about the gas sealed in the gas cylinder, but in general, Freon gas (HFC-134a) is used.
Freon gas is not preferable for the global environment because of its large global warming potential.
Therefore, it is conceivable to use a gas having a small global warming potential instead of the chlorofluorocarbon gas.
However, there are cases where a gas that substitutes for a chlorofluorocarbon gas, such as dimethyl ether, has a property of modifying the resin when it adheres to the resin in a liquid state (hereinafter referred to as “resin modification”). Therefore, as in the smoke detector tester disclosed in Patent Document 1, when a smoke sending section for sending gas to the smoke detector is arranged near the smoke inlet of the smoke detector, such a resin is used as a resin. When a gas having a denatured property is jetted from the smoke sending section, liquid droplets immediately after jetting may adhere to the resin section of the smoke detector, and the resin section may be altered. Therefore, such a smoke tester cannot use a gas having a resin-modifying property.

  The present invention has been made to solve such a problem, and an object of the present invention is to obtain a smoke tester that can be used even in a liquid state even if the gas is resin-modified.

(1) A smoke tester according to the present invention includes a main body portion that accommodates a gas cylinder, a nozzle portion that induces a gas discharged from the gas cylinder accommodated in the main body portion, and injects the gas to the outside, and the periphery of the nozzle portion A cover body that covers the gas and prevents the gas injected from the injection port in the nozzle portion from diffusing, and a contact portion that is disposed above the main body portion and that has an upper end surface that contacts the bottom surface of the smoke inflow portion of the smoke detector And
The distance that gas shortest distance between the extension line of the upper end surface of the contact portion interior surface and intersects the point and of the gas jetting direction of extension said cover member in the injection port is issued from the injection port is sufficiently vaporized It is set so that it becomes.

(2) Further, in the above (1), the shortest distance is set to be 20 mm or more.

(3) Further, in the above (1) or (2), the injection direction of the injection port in the nozzle portion is set so as to be directed downward from the horizontal direction. .

(4) Further, in any of the above (1) to (3), a portion of the contact portion on the injection port side of the nozzle portion is extended outward. It is.

(6) Further, in any of the above (1) to (5), the gas sealed in the gas cylinder is dimethyl ether.

  In the present invention, the shortest distance between the extension line of the gas injection direction at the nozzle outlet and the inner surface of the cover body and the extension of the upper end surface of the contact part is sufficient for the gas emitted from the nozzle to vaporize sufficiently. Therefore, it is possible to prevent the gas and / or liquid sprayed from the injection port from splashing on the smoke sensor. For this reason, the gas sealed in the gas cylinder can be used even if it is liquid, such as dimethyl ether, and is denatured with respect to the resin.

It is explanatory drawing of the smoke tester which concerns on Embodiment 1 of this invention. It is explanatory drawing of the smoke tester which concerns on Embodiment 2 of this invention. It is explanatory drawing of the smoke tester which concerns on Embodiment 3 of this invention. It is explanatory drawing of the smoke tester which concerns on Embodiment 4 of this invention. It is explanatory drawing of the smoke tester which concerns on another embodiment. It is explanatory drawing of the smoke tester which concerns on another embodiment.

[Embodiment 1]
The smoke tester 1 according to the present embodiment includes a main body part 5 that houses a gas cylinder 3, a nozzle part 7 that induces gas discharged from the gas cylinder 3 housed in the main body part 5 and injects the gas to the outside, A cover body 9 that covers the periphery of the nozzle portion 7 and prevents diffusion of the gas injected from the nozzle, and a contact portion that is provided on the upper portion of the nozzle portion 7 and contacts the bottom surface 11a of the smoke inflow portion of the smoke detector 11 13.
Hereinafter, each component will be described in detail.

<Main body>
The main body 5 accommodates the gas cylinder 3. The gas cylinder 3 is encapsulated in a liquid form with fumes. The gas may be one having a resin modification property such as dimethyl ether.

<Nozzle part>
The nozzle part 7 guides the gas discharged from the gas cylinder 3 accommodated in the main body part 5 and injects it to the outside. The nozzle unit 7 includes a rod-like nozzle main body 15 that rises vertically upward from the main body 5 and an injection unit 17 that extends from the nozzle main body 15 in the lateral direction. A flow path is formed inside the nozzle body 15 and the injection unit 17, and an injection port 19 is provided at the tip of the injection unit 17.
In the nozzle portion 7 of the present embodiment, when the nozzle main body portion 15 is directed directly upward, the gas is jetted in the horizontal direction.
In the present embodiment, the distance between the position of the injection port 19 in the nozzle portion 7 and the upper end surface of the contact portion 13 is set to 20 mm. As a result, as shown in FIG. 1, the shortest distance L between the intersection A of the extension line in the gas injection direction and the cover body 9 and the extension line of the upper end surface of the contact portion 13 is 20 mm.

  Although details are not shown, the gas in the gas cylinder 3 is moved in the nozzle portion 7 by pushing the main body portion 5 by bringing the contact portion 13 into contact with the bottom surface 11 a of the smoke inflow portion of the smoke detector 11. Injected from the nozzle portion 7.

<Cover body>
The cover body 9 is formed of a resin-like cylindrical cylindrical portion 9a on the side close to the main body portion 5, and a rubber bellows portion 9b is continuously provided on the upper portion of the cylindrical portion 9a.
Since the diameter of the cover body 9 is longer than the smoke inflow portion of the smoke detector 11 and shorter than the maximum diameter of the smoke detector 11, the cover body 9 can cover the smoke inflow portion of the smoke detector 11. It has become.

<Contact part>
The contact portion 13 is formed of a circular plate attached to the upper end side of the nozzle main body portion 15, is disposed above the main body portion 5, and contacts the smoke detector 11. The contact portion 13 is set to be larger than the area of the bottom surface 11a of the smoke inflow portion of the smoke detector 11, and covers the bottom surface 11a of the smoke inflow portion.
As shown in FIG. 1, the contact portion 13 is set such that the distance from the upper end surface of the contact portion 13 to the position of the injection port 19 in the nozzle portion 7 is 20 mm. At the time of the test, the upper surface of the contact portion 13 contacts the bottom surface 11a of the smoke inflow portion of the smoke detector 11, so that the distance from the injection port 19 to the bottom surface 11a of the smoke inflow portion is 20 mm.

The operation of the present embodiment configured as described above will be described.
The upper end surface of the contact portion 13 is brought into contact with the bottom surface 11 a of the smoke inflow portion of the smoke detector 11 from below the smoke detector 11 that is the test object of the smoke tester 1. When the contact portion 13 is pressed against the bottom surface 11 a of the smoke inflow portion of the smoke detector 11 so as to push up the main body portion 5, the gas in the gas cylinder 3 is injected from the injection port 19 of the nozzle portion 7.
A gas mixed with liquid droplets is ejected from the ejection port 19. The injected gas is easily vaporized, and the liquid droplets are vaporized after the injection. However, some of the ejected liquid droplets hit the cover body 9 before vaporizing. Some of the splashes that hit the cover body 9 do not bounce off and propagate through the inner wall of the cover body 9, but some splash on the cover body 9 and bounce off the smoke detector 11. Since the shortest distance between the intersection A of the injection port 19 and the cover body 9 and the extension line of the upper end surface of the contact portion 13 is 20 mm away, even if the gas splash hits the inner wall of the cover body 9 and rebounds Since the gas droplets are vaporized while the gas droplets are scattered over a distance of 20 mm, the smoke sensor 11 is not applied. For this reason, there is no problem even if the gas sealed in the gas cylinder 3 is liquid, for example, dimethyl ether, and has a property of altering the resin.

  As described above, in the present embodiment, the distance between the injection port 19 and the upper end surface of the contact portion 13 is set to 20 mm and the injection direction is set to the horizontal direction. The shortest distance L between the intersection A of the extended line and the inner surface of the cover body 9 and the extended line of the upper end surface of the contact portion 13 is also 20 mm, and a liquid droplet splashing and rebounding on the inner surface of the cover body 9 during gas injection detects smoke. It is possible to prevent the container 11 from being applied. Therefore, as the gas sealed in the gas cylinder 3, for example, liquefied gas such as dimethyl ether can be used, and a wide range of gases can be used. In addition, if the distance between the intersection A between the extension line in the injection direction of the injection port 19 and the inner surface of the cover body 9 and the upper surface of the contact portion 13 is 20 mm or more, the gas emitted from the injection port 19 is sufficiently large. Since it vaporizes, the same effect as described above can be obtained.

[Embodiment 2]
The smoke tester 21 of the present embodiment will be described with reference to FIG. In FIG. 2, the same parts as those in FIG.
The smoke tester 21 of the present embodiment is set so that the injection direction of the injection port 19 in the nozzle unit 7 is directed downward from the horizontal direction. That is, the direction of the injection port 19 in the injection unit 17 is directed obliquely downward, and the shortest distance L between the intersection A of the extended line in the gas injection direction and the inner surface of the cover body 9 and the extended line of the upper end surface of the contact unit 13 is It is intended to be 20 mm or more.

According to the present embodiment, it is possible to prevent the liquid droplets that bounce off the inner surface of the cover body 9 during gas injection from being applied to the smoke detector 11, and the same effects as those of the first embodiment can be achieved. it can.
Further, in the present embodiment, since the injection port 19 is directed downward, the distance between the contact portion 13 and the injection port 19 can be made smaller than that of the first embodiment, and therefore there is an effect that the overall size can be reduced.

[Embodiment 3]
The smoke tester 23 of the present embodiment will be described with reference to FIG. In FIG. 3, the same parts as those in FIG.
The smoke tester 23 according to the present embodiment extends the portion of the contact portion 13 on the side of the injection port 19 of the nozzle portion 7 to the outside in the first embodiment. That is, the extending part 25 that extends outward is formed on the side of the injection port 19 in the contact part 13, and the overall shape of the contact part 13 is made elliptical.

  According to the present embodiment, since the contact portion 13 can reliably cover the bottom surface 11a of the smoke inflow portion of the smoke detector 11, the liquid portion that rebounds upon hitting the inner surface of the cover body 9 from the injection port 19 during gas injection. It is possible to more reliably prevent splashes from being applied to the smoke detector 11.

  In addition to the configuration of the second embodiment in which the injection port 19 of the nozzle portion 7 faces downward, the extension portion 25 may be formed on the injection port 19 side of the contact portion 13.

  The shape of the contact portion 13 that extends outward is not limited to an elliptical shape as long as it is a shape that covers the injection port 19 in the nozzle portion 7 from above.

[Embodiment 4]
The smoke tester 27 according to the present embodiment will be described with reference to FIG. In FIG. 4, the same parts as those in FIG. 1 are denoted by the same reference numerals.
The smoke tester 27 of the present embodiment is the same as that of the first embodiment except that a porous member 29 is installed so as to face the injection port 19 in the injection nozzle.

According to the present embodiment, when the gas droplets injected from the injection port 19 hit the porous member 29, a part of the gas droplets is once received by the porous member 29 and the distance at which the droplets rebound. Becomes shorter. The other part of the gas droplets is absorbed by the porous member 29, and the gas is vaporized from the porous member 29 as the gas droplets are vaporized. As a result, it is possible to reliably prevent the spray sprayed from the injection port 19 from being applied to the smoke detector 11.
As the porous member 29, for example, a sponge is considered.

  In addition to the configuration of the second embodiment in which the injection port 19 of the nozzle unit 7 faces downward, the porous member 29 may be arranged to face the injection port 19 of the injection nozzle.

  In the above description, the means adopted in the third embodiment for making the contact portion 13 to extend outwardly the injection port 19 side is added to the first and second embodiments. It was. However, even when the position of the injection port 19 does not satisfy the requirements of the first embodiment as in the smoke tester 31 shown in FIG. 5, that is, when the distance between the contact portion 13 and the injection port 19 is short, the contact portion. By providing the extending portion 25 extending outward on the side of the injection port 19 in 13, it is possible to prevent liquid droplets that bounce off the inner surface of the cover body 9 during gas injection from adhering to the smoke detector 11. I have confirmed.

  Further, similarly to the above, the means for disposing the porous member 29 so as to face the injection port 19 of the injection nozzle employed in the fourth embodiment is added to the first and second embodiments. . However, even when the position of the injection port 19 does not satisfy the requirements of the first embodiment as in the smoke tester 33 shown in FIG. 6, the porous member 29 is arranged so as to face the injection port 19 of the injection nozzle. It has been confirmed that by adopting the arrangement means, it is possible to prevent liquid droplets splashing and splashing against the inner surface of the cover body 9 during gas injection from adhering to the smoke detector 11.

1 Smoke tester (Embodiment 1)
DESCRIPTION OF SYMBOLS 3 Gas cylinder 5 Main body part 7 Nozzle part 9 Cover body 9a Cylindrical part 9b Bellows part 11 Smoke detector 11a Bottom surface 13 Contact part 15 Nozzle main body part 17 Injection part 19 Injection port 21 Smoke tester (Embodiment 2)
23 Smoke tester (Embodiment 3)
25 Extension part 27 Smoke tester (Embodiment 4)
29 Porous member 31 Smoke tester (other embodiment)
33 Smoke tester (other embodiments)

Claims (5)

A main body that houses the gas cylinder, a nozzle that guides the gas discharged from the gas cylinder accommodated in the main body and injects the gas to the outside, and a gas that covers the periphery of the nozzle and is injected from an injection port in the nozzle A cover body that prevents diffusion of the liquid , and a contact portion that is disposed above the main body portion and has an upper end surface that abuts against a bottom surface of the smoke inflow portion of the smoke detector,
The distance that gas shortest distance between the extension line of the upper end surface of the contact portion interior surface and intersects the point and of the gas jetting direction of extension said cover member in the injection port is issued from the injection port is sufficiently vaporized A smoke tester characterized by being set to be.   The smoke tester according to claim 1, wherein the shortest distance is set to be 20 mm or more.   The smoke tester according to claim 1 or 2, wherein an injection direction of an injection port in the nozzle portion is set so as to be directed downward from a horizontal direction.   The smoke tester according to any one of claims 1 to 3, wherein a portion of the contact portion on the injection port side of the nozzle portion is extended outward. The smoke tester according to any one of claims 1 to 4, wherein the gas sealed in the gas cylinder is dimethyl ether.

Images