JP4621746B2 - Water leakage detection device - Google Patents

Description

  The present invention relates to a water leakage detection device, and more particularly to a device for detecting water leakage launched under a floor of a living room in an apartment house or the like.

  The cause of water leakage in apartment buildings such as condominiums is mostly water leakage due to construction problems of water supply and hot water supply piping at the initial stage. Further, as the age of the building increases, the cause thereof changes due to unexpected water spillage by a resident in daily life, overflow of a washing machine, looseness of a connection between various devices and piping, or the like. Therefore, just because there was no water leakage in the initial stage does not always mean that there is no water leakage. Residents should always be careful not to cause water leakage. As countermeasures, it is most important not to cause water leakage, but the degree of damage varies depending on how quickly it can be handled when water leakage occurs. Therefore, it goes without saying that damage can be minimized by early detection. However, recent apartment houses such as apartments have double floors, and many pipes are arranged under the floor, so even if water leaks under the floor, it may not be noticed. In addition, when water spills on the floor or overflow of the washing machine, etc., it will be launched under the floor, so it will be known for the first time when a resident on the lower floor points out that there is water leakage from the ceiling on the lower floor. When the floor is opened, there are many cases where water is accumulated under the floor, which causes great inconvenience to residents on the lower floor.

  From such a point of view, a water leakage detection apparatus that is installed under the floor, detects water leakage under the floor, and notifies the occupants of the water leakage has been put into practical use. Patent document 1 shows an example of such a water leak detection apparatus. The water leakage detection device disclosed in Patent Document 1 includes a sensor unit, a power supply unit, an alarm unit or a transmission unit, and a control unit in the apparatus main body, which are installed on a concrete slab under a floor in a building. It is configured as follows.

JP 2004-362384 A

  Since the water leakage detection device disclosed in Patent Document 1 is installed in the main body of the device and is directly installed under the floor, it is necessary to remove the floor surface during maintenance of the device. It is complicated. In particular, since the installation state of the device cannot be confirmed from the room, it is not known even if the device is lying down, and it is expected that the device is left in a state where normal operation of the device is not guaranteed. In addition, since there is a concern that related equipment may break down due to submersion when water leakage occurs, Patent Document 1 also includes a floating material for preventing submergence of these equipment, and there are many components and the cost increases. The whole apparatus becomes large and it is necessary to secure a large installation space. Furthermore, once a water leak alarm is issued, there is no means for stopping the alarm in the living room, so the alarm continues until there is no water leak. In addition, since an independent small power source means such as a button battery or a dry battery is used as the power source, it is necessary to replace the battery periodically, which is very troublesome. Due to forgetting to replace the battery, the actual condition may be limited to detecting the water leakage at the initial stage (about one year after installation). Further, there is a possibility that the battery exhaustion alarm buzzer stops midway due to the battery exhaustion, and if the resident's absence time is long, the battery exhaustion may not be noticed and may remain as it is. In addition, although a water leakage sensor (usually an option) of a type incorporated in an interphone has been put into practical use, it is pointed out that it is extremely expensive and lacks versatility.

  An object of the present invention is to provide a leak detection device for underfloor installation that is compact and easy to maintain, and has high reliability of water leak notification.

The water leakage detection device of the present invention is a device for detecting water leakage under the floor in a building, and comprises a pair of detections comprising an insulating core material and a conductive wire wound around the periphery of the insulating core material. A water leakage detection unit composed of an electrode unit, a power supply unit, a notification unit that operates when the pair of detection electrode units are short-circuited and power is supplied from the power supply unit to the electrode unit, a switch unit, and a control unit The water leakage detection unit is placed under the floor, and the power source unit, the notification unit, the switch unit, and the control unit are unitized and installed on the wall of the room of the building, and the insulating core wood is characterized in Rukoto such a hollow cylindrical body. As the insulating core material, a rubber material or a resin material such as vinyl chloride resin is used. In particular, rubber-made ones are preferably employed because they are excellent in insulation and have a high weight, so that the installation stability under the floor is good.

Moreover, the water leakage detection device of the present invention is a device for detecting water leakage under the floor in a building, and comprises a pair of detections comprising an insulating core material and a conductive wire wound around the periphery of the insulating core material. A water leakage detection unit constituted by an electrode unit, a power supply unit, a notification unit that operates when the pair of detection electrode units are short-circuited and power is supplied to the electrode unit from the power supply unit, a switch unit, A control unit, the water leakage detection unit is placed under the floor, and the power source unit, the notification unit, the switch unit, and the control unit are unitized and configured to be installed in a room wall of a building, and the conductive wire Is made of a ring body made of a coil wire.

  In the water leakage detection device of the present invention, the water leakage detection device further includes detection means for detecting a voltage change between the pair of detection electrode parts, and the control part notifies the notification when a detection value by the detection means exceeds a predetermined threshold value. It is good also as what controls to act | operate a part.

  In the water leakage detection device of the present invention, the power supply unit may include an adapter that is connected to an AC power supply and converts AC power into DC power to supply DC power to the electrode unit. The switch unit may be an operation switch for turning on / off the power supply by the power source unit.

  In the water leakage detection device of the present invention, a lamp or a speaker is preferably used as the notification unit, and both can be used together. As the lamp, an LED (light emitting diode), a halogen lamp or other known lamps are used, and a light emission mode such as continuous light emission or flashing light emission is appropriately set. Further, in addition to the case where a buzzer is emitted from the speaker, a synthesized voice message (for example, “water leak”) registered in advance in the control unit can be configured.

  According to the water leakage detection device of the present invention, when the water leakage detection unit is placed under the floor and there is water leakage under the floor, the pair of detection electrode units are immersed in the water leakage, thereby electrically short-circuiting the detection electrode unit. To do. Due to this electrical short circuit, power is supplied from the power supply unit to the detection electrode unit, whereby the notification unit is activated, and a resident in the room can quickly know that there is water leakage under the floor. Moreover, since the notification unit is installed on the wall of the living room, the notification of the notification unit can be accurately recognized visually or audibly, and a quick response to the water leakage treatment is possible. And since a switch part is also provided in the room wall part with the alerting | reporting part, when a leak detection is unnecessary, a switch part can be turned off, or it is unnecessary when recognizing a leak notice and performing a leak treatment operation. Notification can be cut off. Furthermore, since the electrical devices other than the detection electrode unit are unitized and installed on the wall of the living room, there is no concern that these devices will be submerged due to water leakage, and there will be no failure due to water wetting. The main equipment is unitized and installed on the wall of the living room, so it is excellent in maintenance and reliable water leak notification is promised. Moreover, since the structure is simple, it can be configured compactly and can be provided at low cost.

Further, the water leakage detection part is constituted by an insulating core material and a pair of detection electrode parts made of a conductive wire wound around the periphery of the insulating core material, and the detection electrode part is insulated. Since the insulating core material is wound around the periphery of the conductive core material, the detection electrode portion comes into contact with the lower surface of the floor no matter how the insulating core material is placed under the floor, and water leakage is accurately detected. Moreover, since the water leakage detection part is comprised by the simple structure, it is not necessary to ensure the installation space largely. Then, insulating core material, since a hollow cylindrical body, lead and electrical connection of the lead wire for detecting electrode portion is made simple.

According to the water leakage detection device of the present invention, when the water leakage detection unit is placed under the floor and there is water leakage under the floor, the pair of detection electrode units are immersed in the water leakage, thereby electrically short-circuiting the detection electrode unit. To do. Due to this electrical short circuit, power is supplied from the power supply unit to the detection electrode unit, whereby the notification unit is activated, and a resident in the room can quickly know that there is water leakage under the floor. Moreover, since the notification unit is installed on the wall of the living room, the notification of the notification unit can be accurately recognized visually or audibly, and a quick response to the water leakage treatment is possible. And since a switch part is also provided in the room wall part with the alerting | reporting part, when a leak detection is unnecessary, a switch part can be turned off, or it is unnecessary when recognizing a leak notice and performing a leak treatment operation. Notification can be cut off. Furthermore, since the electrical devices other than the detection electrode unit are unitized and installed on the wall of the living room, there is no concern that these devices will be submerged due to water leakage, and there will be no failure due to water wetting. The main equipment is unitized and installed on the wall of the living room, so it is excellent in maintenance and reliable water leak notification is promised. Moreover, since the structure is simple, it can be configured compactly and can be provided at low cost. Further, the water leakage detection part is constituted by an insulating core material and a pair of detection electrode parts made of a conductive wire wound around the periphery of the insulating core material, and the detection electrode part is insulated. Since the insulating core material is wound around the periphery of the conductive core material, the detection electrode portion comes into contact with the lower surface of the floor no matter how the insulating core material is placed under the floor, and water leakage is accurately detected. Moreover, since the water leakage detection part is comprised by the simple structure, it is not necessary to ensure the installation space largely. Furthermore, the so a conductive wire made of a ring member according to the coil wire, conductive wire from the surface of the insulating core Ri is Do to coil diameter protrudes, is some uneven surface under the floor surface detection electrode unit is placed Even if there is, the contact of the conductive wire to the lower surface of the floor is ensured, the reliability of water leakage detection is further improved, and the spring property by the coil wire is given, and the conductive wire is wound around the periphery of the insulating core material Is made simple and stable.

  A detector that detects a voltage change between the pair of detection electrodes, and controls the controller so that the notification unit is activated when a value detected by the detector exceeds a predetermined threshold value; If the threshold value is set to a value larger than the minute voltage value when the detection electrode part is electrically short-circuited due to moisture or humidity change that moisturizes the bottom surface of the floor, there is no leakage. It is possible to prevent the occurrence of a malfunction that causes a water leak notification. This threshold value is set appropriately after experimentally verifying various cases where the voltage value changes due to causes other than water leakage.

  When the power source unit is connected to an AC power source and includes an adapter that converts AC power to DC power and supplies DC power to the electrode unit, a general commercial power source can be used. It can be incorporated as a design item of a building with the same feeling as an ordinary electrical outlet. In addition, troublesome periodic battery replacement work as in the case of using a battery as a power source is unnecessary, and there is no concern that the battery may be left in an inoperable state due to forgetting to replace the battery.

  When the switch unit is composed of an operation switch for turning on / off the power supply by the power supply unit, when the leakage detection is unnecessary, the operation switch can be turned off to prevent waste of power. Further, when there is a water leak notification, it is possible to start the water leakage treatment after turning off the operation switch, and it is possible to avoid a state in which the water leakage notification is continued even during the water leakage treatment work.

  When a lamp or a speaker is used as the notification unit, a resident in the room can visually or audibly recognize water leakage, and can perform an accurate and prompt response. When the lamp and the speaker are used in combination, accurate notification is also given according to the state of the resident (for example, when they are nearby, at a slightly separated position, when they are sleeping, etc.).

  An embodiment of the water leakage detection device of the present invention will be described with reference to FIGS. FIG. 1 shows a state in which the water leakage detection device 1 according to the embodiment is installed in a living room R of an apartment house (building). Under the living room R is a boundary with a lower-floor living room (not shown). There is a concrete slab S as a floor foundation. In a space portion (under the floor) FU between the floor F and the concrete slab S, a pipe P for water supply or hot water supply is disposed. In the case where the living room R is a washroom or a kitchen, many such pipes P are arranged in the underfloor FU. Therefore, the location of water leakage detection by the present water leakage detection device 1 is preferably a washroom or under the floor of the kitchen. On the floor F, a partition wall (living room wall portion) W is constructed, and the wall W is constituted by an interior material, a heat insulating material, and the like.

  The water leakage detection device 1 is connected to a control box 2 installed on a wall W and branch lines 10b1 and 10b2 (described later) derived from the control box 2 via a two-core cable 3, and a concrete slab of an underfloor FU It consists of the water leak detection part 4 placed on S. The water leakage detection unit 4 includes a pair of detection electrode portions 4b1 and 4b2 wound around a peripheral body of a rubber insulating core 4a formed into a hollow cylindrical shape, and the detection electrode portions 4b1 and 4b2 are provided. Are electrically connected to the lead wires 3b1 and 3b2 of the cable 3 by soldering or the like (see FIG. 4). A connector portion 3 a is provided in the middle of the cable 3, and the water leakage detection portion 4 is electrically connected to the control box 2 via the connector portion 3 a. The control box 2 includes an operation panel portion 2a and a rectangular box-shaped box main body portion 2b, and is installed in the wall W so that the operation panel portion 2a is exposed in the living room R. A power supply unit 5 and a control unit 6 are installed in the box main body 2b, and a lamp 7a and a speaker 7b as a notification unit 7 and an on / off operation switch (switch unit) 8 are attached to the operation panel unit 2a. FIG. 2 shows a state in which the operation panel unit 2a is viewed from the room R side, and is provided at a position where a resident in the room R can easily recognize the light emission state of the lamp 7a. From the speaker 7b, a buzzer, a voice message, etc. are transmitted in the living room R. Further, the operation switch 8 is provided at a position where the resident can easily operate.

  As shown in FIGS. 3 and 4, the water leakage detector 4 is a conductive wire 4b1 in which a coil wire made of a copper wire or the like is formed in a ring shape around a hollow cylindrical insulating core material 4a made of a rubber molding. , 4b2 are wound, and the conductive wires 4b1 and 4b2 constitute a pair of detection electrode portions. Since the conductive wires 4b1 and 4b2 as the detection electrode portions are formed of a coiled wire ring body, the conductive wires 4b1 and 4b2 have a spring property, and thereby, the winding of the insulating core material 4a around the peripheral body can be performed easily and stably. . A through hole 4ab is formed in the cylindrical wall 4aa of the insulating core material 4a, and the two-core cable 3 is inserted into the inner cylindrical portion 4ac through the through hole 4ab. The two lead wires 3b1 and 3b2 of the cable 3 are in a state in which the coating is peeled off in the inner cylindrical portion 4ac, and penetrate the cylindrical wall 4aa of the insulating core material 4a to the outer peripheral portion of the insulating core material 4a. The conductive wires 4b1 and 4b2 that are led out and wound around the periphery of the insulating core 4a are electrically connected by solder or the like. Since the insulating core member 4a is made of rubber and is formed of a hollow cylindrical body, such routing of the lead wires 3b1 and 3b2 and electrical connection between the conductive wires 4b1 and 4b2 can be easily and firmly performed.

  FIG. 5 shows an electrical control block diagram of the water leakage detection device 1 configured as described above. The water leakage detection device 1 is connected to a commercial AC power supply (for example, AC 100V) 10. The AC power supplied from the AC power supply 10 is converted into DC power and transformed by the adapter 5a constituting the power supply unit 5 installed in the control box 2, and the output lines 10a1 and 10a2 are transferred to the CPU 6 as the control unit. Entered. The two-core cable 3 is connected to the branch lines 10b1 and 10b2 branched from the output lines 10a1 and 10a2 through the connector portion 3a. An operation switch 8 is provided on one of the output lines 10a1 and 10a2, and power supply to the water leakage detection device 1 is turned on / off. A DC voltmeter 9 is bridged between the branch lines 10b1 and 10b2, and the DC voltmeter 9 constitutes detection means for detecting a voltage change between the electrode portions 4b1 and 4b2. A detection signal from the voltmeter 9 is input to the CPU 6. The CPU 6 has comparison means (not shown) for comparing the input detection signal (voltage value) with a preset threshold value Vs (see FIG. 6). As shown in FIG. 5, an adapter 5, a CPU 6, a notification unit 7, an operation switch 9, and a voltmeter 9 are integrated into the control box 2 and installed on the wall W of the living room R as shown in FIG. Is done. Further, the water leakage detection unit 4 led out and connected from the control box 2 via the branch lines 10b1 and 10b2 and the cable 3 is placed on the concrete slab S of the underfloor FU, thereby leaking water leakage detection device 1 in the underfloor FU. Is configured.

  The leakage detection of the underfloor FU by the leakage detector 1 configured as described above will be described with reference to the flowchart of FIG. As described above, the threshold value Vs is larger than a minute voltage value when the detection electrode portions 4b1 and 4b2 are electrically short-circuited due to moisture retained by the concrete slab S or humidity of the external environment. Is set. When the switch 8 is turned on (step S2), if the water is launched into the underfloor FU due to an unexpected water spill or the like on the floor F or a trouble with the pipe P, the detection electrode portion (conductive wire) 4b1, 4b2 is immersed in water, whereby both detection electrode portions 4b1 and 4b2 are electrically short-circuited. Due to this electrical short circuit, a direct current flows between the detection electrode portions 4b1 and 4b2. The CPU 6 monitors the voltage value V detected by the voltmeter 9 and compares this detected voltage value V with the threshold value Vs. Since the detection voltage value V when the detection electrode units 4b1 and 4b2 are short-circuited due to water leakage exceeds the threshold Vs (step S3), the CPU 6 operates the notification unit 7 (lamp 7a and speaker 7b) (step S4). Inform residents in room R that there is water leak. The resident can turn off the switch 8 to stop the notification and then take measures for water leakage.

  FIG. 6 is a graph showing a change in the detection voltage V in the voltmeter 9, and the notification unit 7 is activated when the detection voltage V indicated by the line L exceeds the threshold Vs. The situation where the notification unit 7 malfunctions in spite of the absence is avoided. The notification by the lamp 7a is appropriately set to a light emission mode such as continuous light emission or blinking light emission. The emission color is preferably red or orange because it is easy to call attention. Further, for the notification by the speaker 7b, a buzzer, a synthesized voice message, or the like is employed. As the lamp 7a, an LED is desirably employed because it has a long service life, low power consumption, and a small size.

  Since the notification by the notification unit 7 is made by light and sound, not only when there is a resident in the room R, but also when it is in another room (for example, a bedroom), a balcony, or the physical state of the resident. Even if the conditions are different, the resident can accurately recognize that there was water leakage. And since the water leak detection part 4 consists of a simple structure which only wound the electrode parts 4b1 and 4b2 for detection around the surrounding body of the hollow cylindrical insulating core material 4a, it is not necessary to ensure a large installation space. . Moreover, no matter how it is placed on the surface of the concrete slab S, the detection electrode portions 4b1 and 4b2 are in contact with the surface of the concrete slab S, and when there is water leakage, the short circuit is surely made. In particular, since the detection electrode portions 4b1 and 4b2 are formed of coil wires formed by winding a conductive wire in a spiral shape, the detection electrode portions 4b1 and 4b2 protrude from the outer periphery of the insulating core material 4a by the coil diameter and have spring elasticity. Thus, even if there is a slight unevenness on the surface of the concrete slab S, the contact state of the detection electrode portions 4b1 and 4b2 with the surface of the concrete slab S is reliably maintained, and the water leakage detection unit 4 is provided with the concrete slab. Stablely placed on the surface of S. Further, since the water leakage detection unit 4 only includes the detection electrode portions 4b1 and 4b2, and does not include an electrical device, there is no concern that the water leakage detection unit 4 breaks down due to submergence. Therefore, as described in the background art There is no need to provide a floating member as in Patent Document 1.

  Since the adapter 5a, the CPU 6, the notification unit 7, the operation switch 8 and the voltmeter 9 as the power supply unit 5 are unitized and incorporated in the control box 2 and installed on the wall W, these electrical devices are installed under the floor. Even if there is water leakage in the FU, it will not be submerged, and there will be no fear of failure due to water wetting. Since the control box 2 is configured compactly like an ordinary switch box, the atmosphere of the living room R is not destroyed. Further, since the water leakage detection device 1 is configured to be operated by the AC power supply 10, it is possible to monitor water leakage all day, maintenance such as battery replacement is unnecessary, and the battery is not left undetected due to battery exhaustion. . And since the water leak detection apparatus 1 has a simple function, there are few failures and it is comprised cheaply compared with the conventional one.

  FIG. 8 shows another embodiment of the water leakage detection unit 4, and the shape of the insulating core material 4 a in the water leakage detection unit 4 is different from that of the above embodiment. That is, the insulating core material 4a in the water leakage detection unit 4 of the present embodiment is formed in a trapezoidal cross section by obliquely cutting both ends of a hollow cylindrical body made of a rubber molded body. The trapezoidal short side cylindrical wall 4aa is formed with a through hole 4ab as described above, and the two-core cable 3 is inserted into the inner cylinder part 4ac through the through hole 4ab. Also in this case, the two lead wires 3b and 3b of the cable 3 are in a state in which the coating is peeled off in the inner cylindrical portion 4ac, and penetrates the cylindrical wall 4aa of the insulating core material 4a. The conductive wires (detection electrode portions) 4b1 and 4b2 around which the insulating core material 4a is wound are electrically connected by soldering or the like. In the case of the water leakage detection unit 4 of the present embodiment, since the weight of the long side cylindrical wall 4aa is large, when placed on the concrete slab S, the short side is up and the long side is down. Easy to install and stable.

  FIG. 9 shows still another embodiment of the water leakage detection unit 4, which differs from the above embodiment in that the insulating core material 4a in the water leakage detection unit 4 is formed of a rubber molded body of a hollow rectangular tube. . Thus, if the insulating core material 4a is comprised by a hollow square cylinder, stabilization of the installation state of the water leak detection part 4 on the concrete slab S will be achieved. If both ends of the insulating core material 4a are cut obliquely in the same manner as described above, further stabilization is achieved. Also in this case, a through hole 4ab is formed in the cylinder wall 4aa, and the two-core cable 3 is inserted into the inner cylinder part 4ac through the through hole 4ab. The two lead wires 3b1 and 3b2 of the cable 3 are in a state where the coating is peeled off in the inner cylinder portion 4ac, and penetrates the cylindrical wall 4aa of the insulating core material 4a to insulate the insulating core material 4a. The conductive core 4a is electrically connected to the conductive wires (detection electrode portions) 4b1 and 4b2 which are led out to the outer periphery and wound around the periphery by soldering or the like.

  8 and FIG. 9 also includes a power supply unit in the control box 2 installed on the wall W via the two-core cable 3 and the connector unit 3a as shown in FIG. 1 and FIG. 5 is connected. The water leakage detection unit 4 is placed on the concrete slab S, detects a voltage change of the DC voltmeter 9 due to an electrical short circuit between the conductive wires (detection electrode units) 4b1 and 4b2 due to water leakage, and detects the detection voltage V When the value exceeds the threshold value Vs, the CPU 6 activates the notification unit 7 to notify water leakage.

  In the above-described embodiment, the example in which the notification unit 7 includes both the lamp 7a and the speaker 7b has been described, but either one of them may be used. Even when both the lamp 7a and the speaker 7b are provided, a selection switch may be provided so that one of them can be selected according to the user's preference. Needless to say, provision of means for adjusting the light amount of the lamp 7a and the volume of the speaker 7b may be appropriately adopted as a design matter. Furthermore, the shape and material of the insulating core material 4a are not limited to those illustrated, and other shapes and materials (for example, resin) may be employed. The insulating core 4a is preferably a hollow cylindrical body from the viewpoint of the lead wires 3b1 and 3b2 being routed and the stability of the connection portions with the conductive wires 4b1 and 4b2, but is solid. Also good. In addition, although the power supply unit 5 includes the adapter 5a connected to the AC power supply 10, a battery may be used in combination with the adapter 5a so that DC power is supplied by the battery during a power failure. In this case, since the battery is also installed in the control box 2, the battery does not get wet when water leaks, and maintenance such as battery replacement can be easily performed.

It is a longitudinal cross-sectional view which shows notionally the state which installed the water leak detection apparatus which concerns on one Embodiment of this invention in the living room. It is a front view of the control box in the water leak detection apparatus. It is a perspective view of the water leak detection part in the water leak detection apparatus. It is sectional drawing of the same water leak detection part. It is an electric control block diagram of the water leakage detection device. It is a graph which shows the relationship between the voltage change of a water leak detection part, and a threshold value. It is a flowchart which shows the water leak detection process in the water leak detection apparatus. It is a partially broken front view which shows other embodiment of a water leak detection part. It is a perspective view which shows other embodiment of a water leak detection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water leak detection apparatus 4 Water leak detection part 4a Insulating core material 4b1, 4b2 Conductive wire (Detection electrode part)
5 Power supply unit 5a Adapter 6 CPU (control unit)
7 Notification section 7a Lamp 7b Speaker 8 Operation switch (switch section)
9 DC voltmeter (detection means)
10 DC power supply FU Under floor R Living room W Wall (living room wall)
Vs threshold

Claims (7)

A device for detecting water leakage under the floor in a building,
A water leakage detection unit configured by an insulating core material and a pair of detection electrode units made of a conductive wire wound around the periphery of the insulating core material , a power supply unit, and the pair of detection electrode units Is provided with a notification unit that operates when power is supplied to the electrode unit from the power supply unit, a switch unit, and a control unit,
The water leakage detection unit is placed under the floor, and the power supply unit, the notification unit, the switch unit, and the control unit are configured to be unitized and installed in a room wall of a building ,
The insulating core material, leak detection apparatus according to claim Rukoto such a hollow cylindrical body. A device for detecting water leakage under the floor in a building,
A water leakage detection unit configured by an insulating core material and a pair of detection electrode units made of a conductive wire wound around the periphery of the insulating core material, a power supply unit, and the pair of detection electrode units Is provided with a notification unit that operates when power is supplied to the electrode unit from the power supply unit, a switch unit, and a control unit,
The water leakage detection unit is placed under the floor, and the power supply unit, the notification unit, the switch unit, and the control unit are configured to be unitized and installed in a room wall of a building,
The conductive wire, water detection device leakage you wherein Rukoto such a ring body by the coil wire. The apparatus further comprises detection means for detecting a voltage change between the pair of detection electrode sections, and the control section controls the notification section to operate when a detection value by the detection section exceeds a predetermined threshold value. The water leakage detection device according to claim 1 or 2 . The power supply unit according to any one of claims 1-3, characterized in that connected to the AC power supply to convert AC power into DC power and includes an adapter for supplying DC power to the electrode portion Water leakage detection device. The switch unit, the water leak detection apparatus according to any one of claims 1-4, characterized in that it consists of an operation switch for turning on and off the power supply by the power supply unit. Leak detection apparatus according to any one of claims 1 to 5, wherein the notification unit is a ramp. Leak detection apparatus according to any one of claims 1-6 wherein said notification unit is characterized in that it is a loudspeaker.

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