JPH0943089A - Water leak detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low cost detector resistant to dust by providing a detection element, which physically changes under the influence of moisture, between a light emitting means and a facing transmission means on the bottom of an instrument frame, and detecting water leak based on the occurrence of shielding of an optical path due to the changes. SOLUTION: A swell property detection element 21 such as a sponge, etc., is provided between a light emitting element 12 and an optical fiber 9 provided in the position facing it. The element 21 does not shield the optical path of the optical axis line connecting the element 21 with the fiber 9 when it does not absorb water, and, when it absorbs water, it swells and the light path is shielded. Therefore, since the element 21 absorbs water and swells for almost perfectly shielding the light path at water leak, it works as a water leak detector where attenuation amount of light quantity is larger when water leak is detected. And, no deep water leak required, it is enough far operation that only the bottom of the element 21 touches the water leak, and incident light quantity into the fiber 9 is not affected by dust, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage detector, and more particularly to a water-cooled electric device, for example, an electric component is arranged in a thyristor module frame, and the electric component in the thyristor module frame is cooled via a water pipe. In the thyristor valve configured as described above, the presence or absence of leakage of cooling water can be detected by the magnitude of the attenuation of the transmitted light, which is also provided in the thyristor module. The present invention relates to an optical water leak detector capable of detecting smoke emitted by a fire.

[0002]

2. Description of the Related Art FIG.
FIG. 12 is a configuration diagram showing a water leakage detector of a conventional water-cooled thyristor valve shown in Japanese Patent Publication, and FIG. 12 is an enlarged configuration diagram showing a water leakage detection part thereof. In the figure, 1 is a thyristor module frame, 2 is a thyristor, 3 is a heat sink for cooling the thyristor 2, 4 is a snubber capacitor and resistor for partial pressure or damping of the thyristor 2, 5 is water leakage, and 6 is water leakage 5. A water collecting part for watering, 7 is an optical signal transmitter, 8 is a water leak detecting part, 10 is an optical signal receiver connected to the water leak detecting part 8 through an optical fiber 9, and 11 is inside the water leak detecting part 8. The glass plate 12 provided is a light emitting element that is driven by the optical signal transmitter 7 to generate an optical signal.

Next, the operation will be described. When the water leakage 5 does not exist in the water collecting portion 6, the optical signal from the light emitting element 12 passes through the glass plate 11 and enters the optical fiber 9.
However, when the water leak 5 exists in the water collecting portion 6, the optical signal from the light emitting element 12 is refracted by the same effect as the prism, and the amount of light incident on the optical fiber 9 is attenuated. Therefore,
The presence or absence of water leakage 5 can be determined by the amount of attenuation of this light.

[0004]

The conventional water leak detector is
Because of the above-mentioned configuration, there are the following problems. That is, a prism is composed of a glass plate arranged in the water leak detector and water leaks collected between the glass plates, and the refraction direction of the light from the light emitting element is changed depending on the presence or absence of water leak, and the amount of attenuation of the amount of light incident on the optical fiber. Since it is configured to detect water leaks, it is not easy to change the emitted light into collimated light even if a lens is placed at the end of the light emitting element. It is difficult to prevent the light from entering the fiber, and therefore, the detection of water leak occurrence by this method is inaccurate due to the change in light quantity.

Also, if an optical fiber is used instead of the light emitting element to guide an optical signal to the water leak detecting portion, the same effect can be obtained, but a measure such as disposing a lens on the exit end face of the optical fiber is taken. However, it is still difficult to convert the light emitted from the optical fiber into collimated light, and it is difficult to prevent all the light from entering the optical fiber by refraction of the prism. Further, it is possible to produce a certain amount of collimated light by using a semiconductor laser that emits light in a single transverse mode as a light emitting element and also using a lens, but in this case, the unit price of the light emitting element is a so-called LED light emitting element or the like. In addition to being more expensive, the arrangement accuracy of each component such as the optical fiber incident surface opening and the glass plate becomes strict, the adjustment is complicated, and it becomes difficult to guarantee the performance against disturbances such as temperature. Further, since "depth" for collecting water leakage is required between the glass plates, a water collecting portion 6 having a certain depth as shown in Fig. 11 is eventually required, which is different in size of the thyristor valve. Has a non-negligible impact.

Further, when it is assumed that the glass plate will be used for a long period of time, the glass plate has a function of collecting leaked water, so that it is necessary to provide an opening on the glass plate. When the water is accumulated, the amount of light incident on the optical fiber is reduced, so that it may be erroneously recognized as water leakage. Furthermore, when water leakage accumulated between glass plates is contaminated with dust as described above at the time of recovery after the water leakage accident is recovered, dust remains on the glass plate surface after evaporation and is incident on the optical fiber. The light intensity may not be restored. In addition, since it uses livestock water, it takes a relatively long time to evaporate, which requires recovery time.

The present invention has been made in order to solve the above problems, and an object thereof is to provide an inexpensive water leakage detector having a large light attenuation amount at the time of water leakage detection and strong against dust with a simple structure. And

[0008]

A water leakage detector according to the invention of claim 1 is a water-cooled device in which parts are arranged in a device frame and the parts in the device frame are cooled via a water pipe. A light emitting means for generating an optical signal on the bottom surface of the equipment frame, a transmitting means arranged at a position facing the light emitting means for receiving and transmitting an optical signal from the light emitting means, and provided between the light emitting means and the transmitting means. And a detection element that causes a physical change due to the influence of moisture, and the detection element does not physically interrupt the optical path with respect to the optical axis line connecting the light emitting means and the transmission means in a state where the detection element is not physically changed, and It is arranged at a position that blocks the optical path with respect to this optical axis when changing. Further, a water leak detector according to a second aspect of the present invention is the water leak detector according to the first aspect of the invention, in which the detection element is arranged horizontally offset with respect to an optical axis line connecting the light emitting means and the transmitting means.

The water leakage detector according to a third aspect of the present invention is a water-cooled device in which parts are arranged in a device frame and the parts in the device frame are cooled via a water pipe. First transmitting means for introducing an optical signal into the bottom surface of the first transmitting means, and second transmitting means arranged at a position facing the first transmitting means for receiving and transmitting the optical signal from the first transmitting means. , A detecting element which is provided between the first transmitting means and the second transmitting means and which causes a physical change under the influence of moisture, and the detecting element is the first transmitting means in a state where the detecting element is not physically changed. The optical path is not interrupted with respect to the optical axis connecting the second transmission means and the optical path is interrupted with respect to the optical axis when a physical change occurs. Further, in the water leakage detector according to the invention of claim 4, in the invention of claim 3, the detection element is arranged so as to be shifted in the horizontal direction with respect to the optical axis connecting the first transmission means and the second transmission means. It was done.

Further, the water leakage detector according to the invention of claim 5 is a water-cooled device in which parts are arranged in a device frame and the parts in the device frame are cooled via a water pipe. A first transmission means for introducing an optical signal into a water discharge port provided on the bottom surface of the first transmission means, and an optical signal from the first transmission means disposed at a position facing the first transmission means. And a detection element which is provided between the first transmission means and the second transmission means and which causes a physical change under the influence of moisture. The detection element physically changes. The optical axis line that connects the first transmission means and the second transmission means in the state where the optical path is not cut off, and
The cover is arranged at a position that blocks the optical path with respect to the optical axis at the time of physical change, and a lid that covers between the first transmission means and the second transmission means is provided in a direction perpendicular to the optical axis between the transmission means. It is arranged on the upper side. Further, the water leak detector according to the invention of claim 6 is the invention of claim 5, which is provided with a light emitting means for generating an optical signal instead of the first transmission means. The water leakage detector according to the invention of claim 7 is
In the invention of claim 5 or 6, an edge is provided outside the bottom surface of the equipment frame.

According to the eighth aspect of the present invention, in the water leak detector according to any one of the first to seventh aspects, the detection element is a swelling detection element. Further, the water leakage detector according to the invention of claim 9 is the invention according to any one of claims 1 to 8, wherein the light emitting means is a light emitting element. Further, the water leak detector according to the invention of claim 10 is the invention according to any one of claims 1 to 9, wherein the transmission means is an optical fiber.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. Hereinafter, an example of the embodiment of the present invention,
The drawings will be described by taking as an example the case of being applied to a water-cooled thyristor bubble as a water-cooled electric device. In each figure, parts corresponding to those in FIG. 11 are designated by the same reference numerals, and detailed description thereof will be omitted. 1 is a configuration diagram showing a water leak detector according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view of a main part thereof. Reference numeral 20 denotes a water leak detection unit 20 or 21 according to Embodiment 1 of the present invention, and a light emitting element 12 as a light emitting means,
A swelling detection element as a detection element such as a sponge or sponge which is arranged between the optical fiber 9 as a transmission means for receiving and transmitting an optical signal from the light emitting element 12 and which is arranged at a position opposed to this and which is expanded by water absorption. is there. The swelling detection element 21 is arranged at a position that does not block the optical path with respect to the optical axis connecting the light emitting element 12 and the optical fiber 9 in the state of not absorbing water, and blocks the optical path with respect to the optical axis when absorbing water. Set up.

Next, the operation will be described. The swelling detection element 21 is arranged at a position that does not block the optical path with respect to the optical axis connecting the light emitting element 12 and the optical fiber 9 in the state of not absorbing water and blocks the optical path with respect to the optical axis when absorbing water. Since the swelling detection element 21 absorbs water when the water leaks and expands to block the optical path between the light emitting element 12 and the optical fiber 9, the amount of light incident on the optical fiber 9 is almost completely blocked, and the water leak detection is performed. It is possible to obtain a water leak detector with a large amount of light attenuation. Further, the depth of water leakage required for the water leakage detection operation is almost unnecessary as is clear from the above description of the operation, and the operation is sufficiently possible only by the bottom surface of the swelling detection element 21 coming into contact with the water leakage. Further, even when a leaked water contaminated with dust or the like is detected at the time of restoration after the water leakage accident is recovered, the swelling detection element 21 is evaporated after the evaporation.
It is possible to obtain a water leak detector that has no influence on the amount of light incident on the optical fiber 9 only by remaining stains. In addition, it is possible to obtain a water leakage detector that has a shorter recovery time than the conventional water leakage type water leakage detector until evaporation.

Embodiment 2 FIG. 3 is a configuration diagram showing a water leak detector according to Embodiment 2 of the present invention, and FIG. 4 is a side view of the side face thereof as seen from the direction of arrow A. In the figure, 30
Is a water leakage detection unit according to the embodiment of the present invention, and 31 is a swelling detection element as a detection element such as a sponge or sponge that expands due to water absorption. The swelling detection element 31 does not block the optical path with respect to the optical axis connecting the light emitting element 12 and the optical fiber 9 in the state of not absorbing water, and is positioned so as to block the optical path with respect to the optical axis at the time of water absorption expansion. Further, the swelling detection element 31 is provided with the light emitting element 12 and the optical fiber 9.
They are arranged so as to be displaced in the horizontal direction with respect to the optical axis line connecting them.

Next, the operation will be described. Light emitting element 12
Swelling detection element 31 disposed between the optical fiber 9 and the optical fiber 9.
Is disposed at such a position that it does not block the optical path with respect to the optical axis connecting the light emitting element 12 and the optical fiber 9 when water is not absorbed, and blocks the optical path with respect to the optical axis when absorbing water. Therefore, when water leaks, the swelling detection element 31 absorbs water and expands to block the optical path between the light emitting element 12 and the optical fiber 9, and the amount of light incident on the optical fiber 9 is almost completely cut off. A leak detector with a large amount of attenuation can be obtained. Furthermore, since the swelling detection element 31 is arranged so as to be displaced in the horizontal direction with respect to the optical axis connecting the light emitting element 12 and the optical fiber 9, dust and the like are accumulated on the swelling detection element 31 for a long period of time. In addition, since the dust accumulation direction and the expansion direction of the swelling detection element 31 for detecting water leakage are different, the amount of incident light on the optical fiber due to dust accumulation does not decrease, and the water leakage detector has excellent long-term reliability. Can be obtained.

Embodiment 3 FIG. 5 is a configuration diagram showing a water leak detector according to Embodiment 3 of the present invention. In the figure, reference numeral 40 is a water leak detecting unit according to the present invention, 13 is an optical fiber for introducing an optical signal, and the output (optical output in this case) of the optical signal transmitter 7 (FIG. 1) is the water leak detecting unit 40. Lead to. Reference numeral 41 denotes a swelling detection element as a detection element such as a sponge or a sponge that expands due to water absorption, and the swelling detection element 41 does not absorb water.
The optical path is not cut off with respect to the optical axis connecting the optical fiber 9 and the optical fiber 9, and the optical path is cut off with respect to the optical axis when water is expanded. Here, as an example, the optical signal transmitter 7 arranged in the thyristor module frame 1 (FIG. 1) is shown as a signal source of the optical fiber 13 as a transmission means, but the excellent insulation property of the optical fiber 13 is utilized. The signal source may be provided outside the thyristor module frame 1, for example, at the ground potential portion.

Next, the operation will be described. Optical fiber 1
3 and the swelling detection element 41 arranged between the optical fiber 13 and the fiber 9 which is arranged at a position opposed to the optical fiber 13 and receives and transmits the optical signal from the optical fiber 13. Since the optical path is not blocked with respect to the optical axis connecting 9 and the optical path is blocked with respect to the optical axis when absorbing and expanding water, the swelling detection element 41 absorbs and expands due to water absorption when light leaks. Fiber 13
The optical path between the optical fiber 9 and the optical fiber 9 is blocked, and the amount of light incident on the optical fiber 9 is almost completely blocked, so that it is possible to obtain a water leakage detector having a large amount of attenuation of the amount of light at the time of water leakage detection.

Embodiment 4 6 is a configuration diagram showing a water leak detector according to Embodiment 4 of the present invention, and FIG. 7 is a side view of the side face thereof as seen from the direction of arrow A. In the figure, 50
Is a water leakage detection unit according to Embodiment 4 of the present invention, and 51 is a swelling detection element as a detection element such as a sponge or sponge that expands due to water absorption. The swelling detection element 51 is arranged at a position that does not block the optical path with respect to the optical axis connecting the optical fiber 13 and the optical fiber 9 when not absorbing water, and blocks the optical path with respect to the optical axis when absorbing water. Set up.
Further, the swelling detection element 51 is arranged so as to be shifted in the horizontal direction with respect to the optical axis connecting the optical fibers 13 and 9.

Next, the operation will be described. Optical fiber 1
3 and the swelling detection element 51 arranged between the optical fiber 9 and the optical fiber 9 which is arranged at a position facing the optical fiber 13 and receives and transmits the optical signal from the optical fiber 13. Since the optical path is not blocked with respect to the optical axis connecting the fibers 9 and the optical path is blocked with respect to the optical axis when water is expanded, the swelling detection element 51 absorbs and expands when water leaks. The optical path between the optical fiber 13 and the optical fiber 9 is blocked, and the amount of light incident on the optical fiber 9 is almost completely blocked, so that it is possible to obtain a water leak detector having a large amount of attenuation of the light amount at the time of water leak detection. Furthermore, since the swelling detection element 51 is disposed so as to be displaced in the horizontal direction with respect to the optical axis line connecting the optical fibers 13 and 9, dust and the like can be swelled for a long period of time.
Even if the dust is accumulated on 1, the dust accumulation direction and the expansion direction of the swelling detection element 51 for detecting water leakage are different, so that the amount of incident light on the optical fiber 9 due to the dust accumulation does not decrease,
It is possible to obtain a leak detector with excellent long-term reliability.

Embodiment 5. FIG. 8 is a configuration diagram showing a water leak detector according to Embodiment 5 of the present invention, and FIG. 9 is an enlarged view of a main part thereof. . In the figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. 14 is a drain port provided on the bottom surface of the thyristor module frame 1, 60
Is a water leakage detection unit according to the fifth embodiment of the present invention, and 61 is a swelling detection element as a detection element such as a sponge or sponge that expands due to water absorption. The water leakage detection unit 60 is arranged on the drain port 14, and the swelling detection element 61 does not block the optical path with respect to the optical axis line connecting the optical fiber 13 and the optical fiber 9 in a state where water is not absorbed, and at the time of water absorption expansion. It is arranged at a position that blocks the optical path with respect to the optical axis. Reference numeral 62 denotes a lid, which is arranged on the upper side in the vertical direction with respect to the optical axis between the fibers so as to cover between the optical fibers 13 and 9 which face each other.

Next, the operation will be described. Optical fiber 1
3 and the swelling detection element 61 disposed between the optical fiber 9 and the optical fiber 9 which is arranged at a position opposed to the optical fiber 13 and receives and transmits the optical signal from the optical fiber 13. Since the optical path is not blocked with respect to the optical axis connecting the fibers 9 and the optical path is blocked with respect to the optical axis when water is expanded, the swelling detection element 61 absorbs and expands when water leaks. The optical path between the optical fiber 13 and the optical fiber 9 is blocked by this, the amount of light entering the optical fiber is almost completely blocked, and a water leak detector with a large amount of attenuation of the light amount at the time of water leak detection can be obtained. Further, in this embodiment, when smoke due to a fire reaches the water leak detection unit 60 via the drain port 14, the smoke is retained by the lid 62 provided inside the water leak detection unit 60 so as to cover the optical path, As a result, the amount of light reaching the optical fiber 9 from the optical fiber 13 is attenuated, and it becomes possible to detect an abnormality.

Embodiment 6 FIG. 10 is a configuration diagram showing a water leak detector according to a sixth embodiment of the present invention. . In the figure, parts corresponding to those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. Here, the smoke is leaked to the water leak detection unit 60.
The rim 15 is provided outside the bottom surface of the thyristor module frame 1 so that most of the smoke hitting the bottom surface of the thyristor module frame 1 is guided into the optical path of the water leak detection unit 60 through the exhaust port 14. The structure. The same effect can be obtained by using a light emitting element instead of the optical fiber 13.

Embodiment 7 In each of the above embodiments, the case where the present invention is applied to a water-cooled thyristor valve which is one of water-cooled electric devices as a water-cooled device has been described, but the present invention is not limited to this, and other water-cooled electric devices. Can be similarly applied to, and is not limited to electric equipment, and can be similarly applied to other water-cooled equipment such as nuclear equipment, and has the same effect. Further, the detection element that causes a physical change due to the influence of water described above is a case of a swelling detection element in which the volume expands or the weight increases due to absorption of water, but is not limited to this, You may use what changes buoyancy by. Furthermore, the shape of the swelling detection element in each of the above embodiments may be the same or different.

[0024]

As described above, according to the first aspect of the invention, the light emitting means for generating an optical signal on the bottom surface of the equipment frame and the optical signal from the light emitting means arranged at a position facing the light emitting means. And a detecting element provided between the light emitting means and the transmitting means for causing a physical change under the influence of moisture, and the detecting element and the transmitting means in a state where the detecting element is not physically changed. With respect to the optical axis line connecting the optical axis line, it is arranged so as not to block the optical path, and at the time of a physical change, to block the optical path with respect to this optical axis line.
When water leaks, the detection element physically changes to block the optical path between the light emitting means and the transmission means, and the light quantity incident on the transmission means is almost completely blocked. There is an effect that it is possible to obtain a water leakage detector having a large attenuation amount of. Further, the depth of water leakage required for the water leakage detection operation is almost unnecessary, and the operation is sufficiently possible only by contacting the bottom surface of the detection element with the water leakage, so that there is no restriction on the structure of the equipment frame. is there. Also,
Even if a leak of water contaminated with dust is detected at the time of recovery after recovery from a water leak accident, only the stain remains on the detection element after evaporation, and the amount of light incident on the transmission means is not affected at all. This has the effect of obtaining a leak detector with excellent properties. Further, there is an effect that it is possible to obtain a water leakage detector having a shorter recovery time than the conventional water leakage type water leakage detector until evaporation.

According to the second aspect of the present invention, the first aspect is provided.
In the invention, since the detection element is arranged so as to be displaced in the horizontal direction with respect to the optical axis line connecting the light emitting means and the transmission means, even if dust or the like is accumulated on the detection element for a long period of time, the dust accumulation direction and water leakage Since the physical change direction of the detection element for detection is different, there is no reduction in the amount of incident light on the transmission means due to the accumulation of dust, and there is an effect that a water leakage detector with excellent long-term reliability can be obtained. .

According to the third aspect of the invention, the first transmission means for introducing the optical signal into the bottom surface of the equipment frame, and the first transmission means arranged at a position facing the first transmission means. Second transmission means for receiving and transmitting an optical signal from the means,
A detecting element which is provided between the first transmitting means and the second transmitting means and which causes a physical change under the influence of moisture; and the detecting element is provided with the first transmitting means and the first transmitting means in a state where the detecting element is not physically changed. Since the optical path is not blocked with respect to the optical axis connecting the two transmission means, and the optical path is blocked with respect to this optical axis when the physical change occurs, the detection element physically changes when water leaks. And the light path between the first transmission means and the second transmission means is blocked, and the light quantity incident on the second transmission means is almost completely blocked, and the water leakage detector has a large attenuation amount of the light quantity at the time of water leakage detection. There is an effect that can be obtained. Further, the depth of water leakage required for the water leakage detection operation is almost unnecessary, and the operation is sufficiently possible only by contacting the bottom surface of the detection element with the water leakage, so that there is no restriction on the structure of the equipment frame. is there. In addition, even if water leaks that have been contaminated with dust are detected during recovery after the water leak has recovered, the evaporation remains only on the detection element after evaporation, which has no effect on the amount of light incident on the transmission means. There is an effect that a highly durable leak detector can be obtained. further,
As compared with the conventional livestock-type water leakage detector, the time until the evaporation is effective in obtaining a water leakage detector with a shorter recovery time.

According to the invention of claim 4, claim 3
In the invention described above, since the detection element is arranged so as to be displaced in the horizontal direction with respect to the optical axis line connecting the first transmission means and the second transmission means, even if dust or the like is accumulated on the detection element for a long period of time, Since the accumulation direction of dust is different from the expansion direction of the detection element for detecting water leakage, the amount of light incident on the second transmission means due to the accumulation of dust does not decrease, and a leakage detector with excellent long-term reliability is obtained. The effect is that you can.

Further, according to the invention of claim 5, first transmission means for introducing an optical signal into the drainage outlet of the water leak provided on the bottom surface of the equipment frame, and the first transmission means. Second transmission means arranged at opposite positions for receiving and transmitting the optical signal from the first transmission means; first transmission means; and second transmission means
A detecting element which is provided between the transmitting means and which causes a physical change under the influence of moisture, and the detecting element is an optical axis connecting the first transmitting means and the second transmitting means in a state where the detecting element is not physically changed. On the other hand, the optical path is not interrupted, and the optical path is interrupted with respect to the optical axis at the time of a physical change, and a lid for covering the space between the first transmission means and the second transmission means is provided. Since the detecting element is arranged vertically above the optical axis between the transmitting means, the detecting element physically changes when water leaks to close the optical path between the first transmitting means and the second transmitting means.
The amount of light incident on the second transmission means is almost completely blocked, and it is possible to obtain a water leakage detector having a large amount of attenuation of the amount of light at the time of water leakage detection. Further, the depth of water leakage required for the water leakage detection operation is almost unnecessary, and since the operation is sufficiently possible only by contacting the bottom surface of the detection element with the water leakage,
The effect is that there is no restriction on the structure of the device frame. In addition, even if water leaks that have been contaminated with dust are detected during recovery after the water leak has recovered, the evaporation remains only on the detection element after evaporation, which has no effect on the amount of light incident on the transmission means. There is an effect that a highly durable leak detector can be obtained. In addition, there is an effect that it is possible to obtain a water leakage detector having a shorter recovery time than the conventional water leakage type water leakage detector until evaporation. Furthermore, when the smoke from the fire reaches the water leak detector through the drain port, the smoke is accumulated by the lid provided inside the water leak detector so as to cover the optical path, and as a result, the first transmission means moves to the second side. The amount of light reaching the transmission means is attenuated, and there is an effect that a water leakage detector capable of detecting an abnormality can be obtained.

According to the invention of claim 6, claim 5
In the invention described above, since the light emitting means for generating an optical signal is provided instead of the first transmission means, the same effect as that of the fifth aspect can be obtained.

According to the invention of claim 7, claim 5
In the invention of 6 or 6, since the edge is provided on the outer side of the bottom surface of the equipment frame, most of the smoke hitting the bottom surface of the equipment frame can be efficiently guided into the optical path of the water leak detection unit through the exhaust port, and the detection accuracy can be improved. There is an effect.

According to the invention of claim 8, claim 1
In any one of the inventions 1 to 7, since the detection element is a swelling detection element, there is an effect that the optical path can be reliably blocked with respect to the optical axis.

According to the invention of claim 9, claim 1
In any one of inventions 8 to 8, since the light emitting means is a light emitting element, there is an effect that the water leakage detector can be configured with a simple configuration.

Further, according to the invention of claim 10, in any one of the inventions of claims 1 to 9, since the transmission means is an optical fiber, there is an effect that the detection information of water leakage can be surely transmitted.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a water leak detector according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a main part of the water leakage detector according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram showing a water leak detector according to a second embodiment of the present invention.

FIG. 4 is a side view showing a water leak detector according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram showing a water leak detector according to a third embodiment of the present invention.

FIG. 6 is a configuration diagram showing a water leak detector according to a fourth embodiment of the present invention.

FIG. 7 is a side view showing a water leak detector according to a fourth embodiment of the present invention.

FIG. 8 is a configuration diagram showing a water leak detector according to a fifth embodiment of the present invention.

FIG. 9 is a configuration diagram showing a main part of a water leak detector according to a fifth embodiment of the present invention.

FIG. 10 is a configuration diagram showing a water leak detector according to a sixth embodiment of the present invention.

FIG. 11 is a configuration diagram showing a conventional water leakage detector.

FIG. 12 is a configuration diagram showing a water leak detection unit used in a conventional water leak detector.

[Explanation of symbols]

9,13 Optical fiber, 12 Light emitting element, 14 Drainage port, 15 edges, 20, 30, 40, 50, 60 Water leak detection part 21, 31, 41, 51.61 Swelling detection element, 62 Lid.

Claims (10)

[Claims] 1. A water-cooled device in which components are arranged in an equipment frame and the components in the equipment frame are cooled via a water pipe, and a light emitting means for generating an optical signal on the bottom surface of the equipment frame. A transmitting means arranged at a position facing the light emitting means for receiving and transmitting an optical signal from the light emitting means; and a detection element provided between the light emitting means and the transmitting means for causing a physical change under the influence of moisture. The detection element does not block the optical path with respect to the optical axis connecting the light emitting means and the transmission means in a state where it is not physically changed, and blocks the optical path with respect to the optical axis when physically changed. A water leak detector characterized in that it is arranged at such a position. 2. The water leakage detector according to claim 2, wherein the detection element is arranged so as to be displaced in the horizontal direction with respect to the optical axis connecting the light emitting means and the transmission means. 3. A water-cooled device in which components are arranged in a device frame and the components in the device frame are cooled via a water pipe, wherein a first component for introducing an optical signal into the bottom surface of the device frame is provided. A first transmission means, a second transmission means arranged at a position facing the first transmission means and receiving and transmitting an optical signal from the first transmission means; the first transmission means; and the second transmission means. A detection element which is provided between the transmission means and causes a physical change under the influence of moisture, and the detection element connects the first transmission means and the second transmission means in a state where the detection element is not physically changed. A water leak detector characterized in that it is arranged at a position that does not block the optical path with respect to the optical axis and blocks the optical path with respect to the optical axis when a physical change occurs. 4. The water leak detector according to claim 3, wherein the detection element is arranged so as to be displaced in the horizontal direction with respect to an optical axis connecting the first transmission means and the second transmission means. . 5. A water-cooled device in which parts are arranged in an equipment frame and the parts in the equipment frame are cooled via a water pipe, and a drainage port for water leakage provided on the bottom surface of the equipment frame. A first transmission means for introducing an optical signal, and a second transmission means arranged at a position facing the first transmission means for receiving and transmitting the optical signal from the first transmission means, A detection element is provided between the first transmission means and the second transmission means, which causes a physical change under the influence of moisture, and the detection element is the first transmission in a state where the detection element is not physically changed. The optical path with respect to the optical axis connecting the means and the second transmission means, the optical path is not blocked, and the optical path is blocked with respect to the optical axis when a physical change occurs, and
A water leakage detector characterized in that a lid covering between the first transmission means and the second transmission means is arranged on an upper side in a vertical direction with respect to an optical axis line between the transmission means. 6. The water leakage detector according to claim 5, further comprising a light emitting means for generating an optical signal instead of the first transmission means. 7. The water leakage detector according to claim 5, wherein an edge is provided on the outside of the bottom surface of the equipment frame. 8. The water leakage detector according to claim 1, wherein the detection element is a swelling detection element. 9. The water leakage detector according to claim 1, wherein the light emitting means is a light emitting element. 10. The water leakage detector according to claim 1, wherein the transmission means is an optical fiber.