JP2002236072A - Water leakage detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water leakage anomality detecting device, capable of suppressing the degradation of a water leakage detecting part and accurately determining a water leakage anomality. SOLUTION: The water leakage detecting device is provided with a water leakage reservoir part 15 for storing water leaked from a reservoir part, the water leakage detecting part 16 provided with a pair of electrodes 17 and 18, which conduct in reservoir water in the water leakage reservoir part 15, and a control means H for controlling the state of energization to the water leakage detecting part 16 and determining a water leakage anomaly on the basis of information detected by the water leakage detecting part 16. The water leakage detecting device is constituted, in such a way that the control means H causes energization to the water leakage detecting part 16 to be stopped, when a water leakage anomality is determined and maintains the halting state of energization.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage storage part for storing water leaking from a water storage part, a water leakage detection part provided with a pair of electrodes conducted by the water stored in the water leakage storage part, and a water leakage detection part. The present invention relates to a water leakage detection device provided with control means for controlling a state of current supply to a detection unit and determining a water leakage abnormality based on information detected by the water leakage detection unit.

[0002]

2. Description of the Related Art The above-described water leakage detection device is adapted to a dishwasher, etc., and is provided with a water leakage storage portion for storing water leaking from a washing tank as a storage portion. When the state where water is stored in the portion is detected, the control means determines that there is a water leakage abnormality, and when the pair of electrodes is conducted by the stored water, the resistance of the stored water is between the pair of electrodes. Utilizing that, when the pair of electrodes is conducted by the stored water, the detection resistance value is configured to fluctuate,
When the fluctuation of the detected resistance value is detected, it is determined that the water leakage is abnormal (for example, Japanese Patent Application Laid-Open No. H10-160547). In this type of water leakage detection device, when the pair of electrodes are electrically connected to the stored water while the water leakage detection unit is energized, the control unit determines that the water leakage is abnormal. Even after determining that there is a water leakage abnormality,
It is configured to continue energizing the water leak detection unit.

[0003]

However, in the above-described conventional water leakage detection device, even after the control means determines that the water leakage is abnormal, the power supply to the water leakage detection unit is continued, so that the pair of electrodes is configured to store the water leakage. In a state of being immersed in the stored water of the part, the power supply to the pair of electrodes will be continued,
There is a possibility that the electrode terminal may be eluted and the water leakage detection unit may be deteriorated.

Further, if the pair of electrodes is immersed in the water stored in the water leakage storage section and the power supply to the pair of electrodes is continued, the stored water is decomposed and bubbles and the like are generated on the surface of the positive electrode. Therefore, there is a possibility that the abnormality of the water leakage cannot be determined.
To add an explanation, this type of water leak detection device determines a water leak abnormality by detecting a change in a detection resistance value caused by conduction of a pair of electrodes in stored water. When air bubbles or the like are generated on the surface, the contact area between the stored water and the electrode decreases, and the fluctuation amount of the detection resistance value decreases. Therefore, when air bubbles and the like are generated on the surface of the electrode, even if the leaked water is stored in the water leak storage section,
The fluctuation amount of the detection resistance value becomes smaller than the fluctuation amount of the detection resistance value that should occur originally, and as a result, there is a possibility that the abnormality of the water leakage cannot be determined.

[0005] Incidentally, by setting the fluctuation amount of the detection resistance value, which is a reference when judging the water leakage abnormality, small, it is possible to determine the water leakage abnormality even if bubbles or the like are generated on the surface of the electrode. However, in this case, there is a risk that the water leakage abnormality is erroneously determined due to the influence of noise or the like, and the reliability of the determination of the water leakage abnormality may be reduced.

The present invention has been made in view of such a point, and an object of the present invention is to prevent a deterioration of a water leakage detection unit and to accurately determine a water leakage abnormality. The point is to provide.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a water leakage storage portion for storing leaked water, and the leakage water is stored in the water storage portion of the water leakage storage portion. And a control means for controlling a state of current supply to the water leakage detection unit and determining a water leakage abnormality based on information detected by the water leakage detection unit. In the water leakage detection device, when the control unit determines that the water leakage is abnormal, the control unit stops power supply to the water leakage detection unit and maintains the power supply stop state.

[0008] That is, when the control means stores the water leaking into the water leakage storage part and the pair of electrodes are conducted in the storage part,
It is determined that there is a water leakage abnormality and the power supply to the water leakage detection unit is stopped.
Since the power supply stop state is configured to be maintained, after the control means determines that the water leakage is abnormal, it is possible to stop the power supply to the water leakage detection unit and maintain the power supply stop state. As a result, it is possible to prevent the power supply to the pair of electrodes from being continued while the pair of electrodes is immersed in the stored water. Therefore, by preventing the pair of electrodes from continuing to be energized while the pair of electrodes is immersed in the stored water, it is possible to avoid a situation such as elution of the electrode terminals and to suppress the deterioration of the water leakage detection unit. In addition, it is possible to avoid a situation in which air bubbles or the like are generated on the surface of the electrode and to accurately determine a water leakage abnormality.

[0009] To summarize the above, according to the first aspect of the present invention, while the pair of electrodes is immersed in the stored water,
Since it is possible to avoid a situation in which the energization of the pair of electrodes is continued, it is possible to suppress the deterioration of the water leakage detection unit, and to detect a water leakage abnormality accurately. I can provide it.

According to the second aspect of the present invention, when a release operation for releasing a water leakage abnormality is performed, the control unit releases the maintenance of the power supply stop state and supplies power to the water leakage detection unit. It is configured to return.

That is, when the control means performs a process such as discharging the water stored in the water leakage storage unit and then performs a release operation, the control unit restarts the power supply to the water leakage detection unit and performs the release operation. Until the power supply is stopped, the control means determines that there is a water leakage abnormality, and if there is stored water in the water leakage storage unit, the power supply to the water leakage detection unit is stopped, and the water leakage is stopped. When the stored water no longer exists in the storage unit, it is possible to return the power supply to the water leakage detection unit to a return. Therefore, it is possible to reliably determine whether there is a water leakage abnormality while properly avoiding the continuation of energization to the pair of electrodes while the pair of electrodes is immersed in the stored water.

According to the third aspect of the present invention, when the control unit performs a power reset operation on the control unit, the control unit determines that the release operation has been performed, and returns to the power supply to the water leakage detection unit. It is configured to be.

That is, for example, when the control means performs an operation of resetting an operation switch for switching the water leakage detection device between the operating state and the non-operational state, the control means is configured to return the power supply to the water leakage detection unit. In the case where the operation switch is reset, the operation of the operation switch is normally performed.Therefore, the operation of the operation switch may be erroneously reset in a state where the water stored in the water leakage storage unit is not discharged.
When stored water is present in the water leakage storage unit, there is a risk that power supply to the water leakage detection unit may be restored by mistake. On the other hand, according to the third aspect of the present invention, when the control means performs a power reset operation on the control means, for example, by turning off the power outlet again, the power supply to the water leakage detection unit is restored. Since it is configured, it is possible to return the power to the water leak detection unit by performing a power reset operation on the control means, which is not often performed, and the stored water exists in the water leakage storage unit. It is possible to reliably avoid a situation in which the power supply to the water leakage detection unit is erroneously restored in a state where the water leakage is detected.

According to the fourth aspect of the present invention, there is provided a discharge means for discharging the water stored in the storage section, and when the control means determines that the water leakage is abnormal, the control section activates the discharge means and The apparatus is configured to execute a water leakage abnormality process for notifying the water leakage abnormality.

That is, when the control means determines that there is a water leakage abnormality, the control section activates the discharge means to discharge the water stored in the storage section and executes a water leakage abnormality process for notifying the water leakage abnormality. It is possible to do
By automatically discharging the water stored in the storage unit, it is possible to prevent water from leaking from the storage unit to the water leakage storage unit, and to prevent the stored water from leaking from the water leakage storage unit. It is possible to make the user recognize that the abnormality is abnormal, and to urge the user to perform processing for the water leakage abnormality.

In cooperation with the second aspect of the present invention, the user can accurately perform processing such as discharging the water stored in the water leakage storage unit by the notification of the water leakage abnormality, and the processing is performed. Thereafter, by performing a release operation for releasing the water leakage abnormality, it is possible to return the power supply to the water leakage detection unit in a state where there is no water in the water leakage storage unit, and when the stored water is present in the water leakage storage unit. Thus, it is possible to reliably avoid a situation in which a current is supplied to the pair of electrodes.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which a water leakage detection device according to the present invention is applied to a dishwasher will be described with reference to the drawings. The dishwasher includes a main body 1 having an open front surface, a cleaning tank 2 that can be stored and moved with respect to the main body 1 and can be pulled out of the main body 1 and a cleaning tank 2 that is attached to the main body 1. An inner lid 3 that closes the upper surface of the washing tank 2 in the stored state and opens the upper surface of the washing tank 2 with the washing tank 2 pulled out of the main body 1, and controls the operation of the dishwasher. And a control unit H as control means for performing the control.

Below the bottom of the washing tank 2, there are provided a washing pump 5, a drain pump 14 for discharging hot water from the washing tank 2 through a discharge passage (not shown), and the like. 2, a cleaning nozzle 6 and a heater 7
The cleaning pump 5, the cleaning nozzle 6, the heater 7, and the like are integrated with the cleaning tank 2. Further, inside the washing tank 2, a washing basket 8 for accommodating tableware and the like is removably accommodated, and a float 4a which moves up and down according to the water level of the washing tank 2 is provided to set the water level of the washing tank 2. A contact type water level sensor 4 for detecting whether or not the water level is provided.

The water level sensor 4 communicates with the bottom of the cleaning tank 2 and has a sensor storage section 4b whose water level varies according to the water level of the cleaning tank 2 and a float which moves up and down according to the water level of the sensor storage section 4b. 4a, and a contact-type switch unit 4c that is turned on / off by the vertical movement of the float 4a. In addition, the switch unit 4c is composed of a switch lever that swings around the axis of the horizontal axis and a contact-type micro switch that is turned on / off by the switch lever, and the switch lever is moved up and down by the float 4a. Swing to turn on / off the micro switch
When the water level in the washing tank 2 becomes higher than the set water level, the micro switch is turned off.

Inside the main body 1, a pair of left and right slide mechanisms 9 for storing and moving the washing tank 2 with respect to the main body 1 and moving the cleaning tank 2 out of the main body 1 are provided. The cleaning tank 2 is configured to be housed and moved with respect to the main body 1 or withdrawn from the main body 1 while the horizontal or substantially horizontal posture is maintained. A door 10 for opening and closing the main body 1 is provided on the front surface of the cleaning tank 2.
Handle 11 for pulling out from the main body 1 is provided,
When the cleaning tank 2 is stored in the main body 1, the front surface of the main body 1 is closed by the door 10. In the state where the washing tank 2 is pulled out from the main body 1, tableware and the like can be stored in and removed from the washing basket 8. With the washing tank 2 stored in the main body 1, the washing pump 5, the washing nozzle 6, The heater 7 and the like are operated to perform various operations such as a cleaning operation and a drying operation.

The inner cover 3 is disposed on the inner upper surface of the main body 1 in a state where the inner cover 3 is biased forward by the coil spring 12 for the inner cover. At the end, the inner lid 3 is pushed by the cleaning tank 2 to move the inner lid 3 in the storing direction of the cleaning tank 2, that is, the main body. 1 is provided with a contact portion 3a for moving to the rear side. Then, using the cam mechanism, the inner lid 3 is moved downward in conjunction with the movement of the cleaning tank 2 in the storage direction (rear side of the main body 1), and the pulling-out direction of the cleaning tank 2 (the main body 1). (The front side of part 1)
An inner lid guide mechanism 13 for moving the inner lid portion 3 upward in conjunction with the movement of the inner lid 3 is provided.

In addition, as shown in FIGS. 2 and 3, when the cleaning tank 2 is moved from the state where the cleaning tank 2 is pulled out from the main body 1 to the storage direction (rear side of the main body 1), The contact part 3a of the inner lid part 3 is pushed by the cleaning tank 2, and the inner lid part 3 and the cleaning tank 2 move integrally in the storage direction (rear side of the main body part 1), and the inner lid guide mechanism 13 The inner lid 3 is moved downward by the action of the cam mechanism in
Is moved to the storage position, the upper surface of the washing tank 2 is closed by the inner lid 3.

When the cleaning tank 2 is moved in the pulling-out direction (front side of the main body 1) from the state in which the cleaning tank 2 is stored in the main body 1, the urging force of the inner lid coil spring 12 and the inner lid guide. By the action of the cam mechanism in the mechanism 13,
The cleaning tank 2 is moved in the pulling-out direction while the inner lid part 3 moves upward, and the cleaning tank 2 is pulled out from the main body 1.
Is configured to open the upper surface of the.

On both sides of the inner side surface of the main body 1, the cleaning tank 2 is pulled out of the main body 1 in a state where the cleaning tank 2 is pulled out.
When the is moved in the storage direction, an auxiliary mechanism A for assisting the cleaning tank 2 to the storage position using a toggle mechanism is provided. The auxiliary mechanism A is configured such that when the cleaning tank 2 is moved in the pull-out direction from the state where the cleaning tank 2 is held at the storage position, the cleaning tank 2 is auxiliary-guided in the pull-out direction by using a toggle mechanism. Have been.

As described above, this dishwasher has a washing tank 2
Can be stored and moved with respect to the main body 1 and can be pulled out of the main body 1 so that the cleaning tank 2 is stored in the storage position. It is configured to perform each operation. The dishwasher is provided with a water leakage detection device for determining a water leakage abnormality in which water leaks from the sensor storage section 4b due to an abnormality of the water level sensor 4 or water leaks from a connection portion of the washing tank 2 or the like. ing.

Hereinafter, the water leakage detecting device will be described. The water leakage detection device includes a water leakage storage portion 15 that stores water leaking from a sensor storage portion 4b of the water level sensor 4 and a connection portion of the washing tank 2, and a pair of electrodes 17 that are connected to the water stored in the water leakage storage portion 15. , 18 and a control unit H for controlling the state of current supply to the water leakage detection unit 16 and determining a water leakage abnormality based on information detected by the water leakage detection unit 16. I have.

As shown in FIG. 4, the water leak detector 16 includes a base 16a made of a synthetic resin formed by connecting insulators, and a pair of substantially V-shaped insert-molded insulators. It is composed of electrodes 17, 18 and the like. The lower ends of the pair of electrodes 17, 18 are formed so as to be exposed from the base portion 16a, and when the water leaking to the water leakage storage portion 15 is stored, the pair of electrodes 17, 18 is conducted by the stored water. Thus, the base portion 16a is configured to be fixed by inserting a screw into a screw hole formed at an end portion of the base portion 16a or the like.

In this water leakage detection device, when the water leaking into the water leakage storage unit 15 is stored, the pair of electrodes 17 and 18 are conducted by the stored water, and the stored water is interposed between the pair of electrodes 17 and 18. Since a resistance is generated, the pair of electrodes 17 and 18
The control unit H detects a change in resistance due to conduction through the stored water, thereby determining a water leakage abnormality.

The detection circuit Ha in the control section H for detecting the water leakage abnormality will be described. This detection circuit H
a, as shown in FIG. 5, terminals A and B
Through the connecting portions 17a and 17b of the first electrode 17
And the terminals C and D are connected to the connection portions 18a and 18b of the second electrode 18 via the electric wires 19, respectively. The terminal A is connected to the control voltage Vcc via the first resistor R1, and the terminal B is connected to the ground GND via the second resistor R2. Also,
The terminal C is connected to the ground GND, and the terminal D is connected to the third
It is connected to the control voltage Vcc via the resistor R3.

If the connection state of the first electrode 17 is abnormal such as the electric wire 19 is disconnected or the connector is disconnected, the potential of the terminal B becomes 0 V, and the electric wire 4 is disconnected or the connector is disconnected. If the connection state of the second electrode 18 is abnormal, for example, the potential of the terminal D becomes Vcc, the connection state of the first electrode 17 and the second electrode 18 is detected by detecting the potentials of the terminals B and D. Is configured to determine whether or not is normal.

Further, by detecting the potential of the terminal A, it is determined whether or not the water leaking into the water storage section 15 is stored. Have been. To add an explanation, there is no stored water in the water leakage storage unit 15 and the pair of electrodes 17 and 18
Is not conducted, the potential of the terminal A is Vcc ×
R2 / (R1 + R2). On the other hand, when the stored water is present in the water leakage storage unit 15 and the pair of electrodes 17 and 18 are electrically connected, the potential of the terminal A is Vcc × Rb / (R
1 + Rb). However, Rb = Ra × R2 / (Ra
+ R2), and Ra is the resistance of the stored water between the pair of electrodes 17 and 18. Therefore, when the pair of electrodes 17 and 18 are conducted by the stored water, the resistance of the stored water occurs between the pair of electrodes 17 and 18 and the potential of the terminal A fluctuates.
By detecting a change in the potential of the terminal A, a water leakage abnormality is determined.

The control unit H is configured to constantly supply current to the water leakage detection unit 16 and detect a change in the potential of the terminal A to determine a water leakage abnormality, as described above.
When it is determined that there is a water leakage abnormality, the power supply to the water leakage detection unit 16 is stopped, the power supply stop state is maintained, the drainage pump 14 is operated, and a water leakage abnormality process for notifying the water leakage abnormality is performed. It is configured as follows. Then, when a release operation for releasing the water leakage abnormality is performed, the control unit H is configured to release the maintenance of the power supply stop state and return the power supply to the water leakage detection unit 16.

The above-described water leakage abnormality processing will be specifically described. This water leakage abnormality processing is executed when it is determined that the water leakage is abnormal, and the drainage pump 14 such as the cleaning pump 5 or the cleaning nozzle 6 is used.
The other operations are stopped, only the drain pump 14 is operated to discharge the hot and cold water stored in the washing tank 2 through the discharge path, and the operation unit S provided on the front surface of the door 10 is operated.
Is configured to blink the abnormality lamp to notify the abnormality of water leakage. Then, the water level of the washing tank 2 is lowered by the operation of the drainage pump 14, and when a set time has elapsed since the switch unit 4c of the water level sensor 4 was turned on, the drainage pump 14
Is stopped, and a locked state in which the operations of the cleaning pump 5 and the cleaning nozzle 6 are stopped is maintained.

After draining the water stored in the water leakage storage unit 15 and performing maintenance work on the dishwasher, etc.,
When a reset operation of the power supply to the control unit H is performed, it is determined that a release operation for releasing the water leakage abnormality is performed, and the locked state is released. Incidentally, the stored water in the water leakage storage unit 15 can be discharged through the discharge port, for example, by removing the plug of the water outlet provided in the water leakage storage unit 15, or can be discharged by removing the water leakage storage unit 15. .

When the control unit H determines that there is a water leakage abnormality, the control unit H stops the power supply to the water leakage detection unit 16 and maintains the power supply stopped state.
Is configured to avoid a situation in which a pair of electrodes 17 and 18 are energized while being immersed in the stored water. And
The energization stopped state in which the energization to the water leakage detection unit 16 is stopped is as follows.
After discharging the stored water in the water leakage storage unit 15 or performing maintenance work on the dishwasher, if a reset operation of the power supply to the control unit H is performed, it is determined that a release operation for canceling the water leakage abnormality is performed. The power supply to the water leakage detection unit 16 is restored.

After the water leakage abnormality is determined in this way, when stored water is present in the water leakage storage unit 15, the power supply to the water leakage detection unit 16 is stopped, the power supply stopped state is maintained, and the water leakage storage unit 15 is maintained. When there is no stored water at 15,
The energization of the water leakage detection unit 16 can be restored, and it is possible to accurately prevent the energization of the pair of electrodes 17 and 18 from being continued while the pair of electrodes 17 and 18 is immersed in the stored water. Then, while suppressing the deterioration of the water leakage detection unit 16,
It is possible to accurately and surely determine the leakage abnormality,

Further, after the power supply to the water leakage detection unit 16 is stopped, the power supply to the water leakage detection unit 16 is restored by performing a power reset operation on the control unit H, which is not often performed. In a state where the water stored in the water leakage storage unit 15 has been reliably discharged, the power supply to the water leakage detection unit 16 can be restored, and the pair of electrodes 17 and 1 can be returned.
8 is immersed in the stored water while the pair of electrodes 17, 18
It is possible to reliably prevent the energization of the battery from being continued.

The operation of the controller H for a water leakage abnormality will be described with reference to a flowchart. First, in a power supply state where power is supplied to the water leakage detection unit 16, when water leaking to the water leakage storage unit 15 is stored and the pair of electrodes 17, 18 is conducted by the stored water, it is determined that a water leakage abnormality has occurred. The power supply to the water leakage detection unit 16 is stopped, the drain pump 14 is operated, and a water leakage abnormality process for notifying the water leakage abnormality is performed (steps 1 to 3).

If the reset operation of the power supply to the control unit H is not performed and the release operation for releasing the water leakage abnormality is not performed, the power supply to the water leakage detection unit 16 is stopped, and the cleaning pump 5 is maintained. A lock state for stopping the operation of the cleaning nozzle 6 and the like is maintained (steps 4 to 6). After that, when the reset operation of the power supply to the control unit H is performed by discharging the stored water of the water leakage storage unit 15 or performing maintenance work of the dishwasher, it is determined that the release operation has been performed and the water leakage detection unit 16 is restored (steps 4 and 7). By the way,
When the above-described release operation is performed, the locked state is released.

[Another Embodiment] (1) In the above embodiment, the power supply to the water leak detection unit 16 in the water leak detection device is configured to be constantly performed. An abnormality detection period is set, and the water leakage abnormality detection period
To the water leak detector for other periods.
For example, the power supply to the water leak detector 16 may be interrupted, for example, by stopping the power supply to the power supply 6.

(2) In the above embodiment, when the power supply reset operation is performed on the control unit H, the release operation for releasing the water leakage abnormality is performed.
For example, when a reset operation of the operation switch for switching the dishwasher between the operation state and the non-operation state is performed, it is also possible to configure and execute such that the release operation is performed, and as the release operation, The operation is not limited to the reset operation of the power supply to the control unit H, and other various operations can be applied.

(3) In the above-described embodiment, the abnormality lamp of the operation unit S is configured to blink as the notification of the water leakage abnormality. Various notification means can be applied, such as notifying the water leakage abnormality by voice instead of flashing the lamp. Incidentally, it is preferable that the notification of the water leakage abnormality is notified by a method different from the method of notifying the other abnormality.

(4) In the above-described embodiment, the detection circuit Ha is configured to determine whether the connection state between the first electrode 17 and the second electrode 18 is normal and to determine a water leakage abnormality. However, it is also possible to configure and execute so as to determine only the water leakage abnormality.

(5) In the above embodiment, an example is shown in which the water leakage detection device according to the present invention is applied to a slide-type dishwasher. However, the present invention is also applicable to a dishwasher other than a slide-type dishwasher. Further, the water leakage detection device according to the present invention is not limited to a dishwasher, but may be any device that needs to detect water leakage, and is applicable to devices other than the dishwasher.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a dishwasher.

FIG. 2 is a side view of the dishwasher in a state where a washing tank is stored in a storage position.

FIG. 3 is a side view of the dishwasher in a state where a washing tank is drawn out.

FIG. 4 is a diagram showing a water leak detection unit.

FIG. 5 is a diagram showing a water leak detection unit and a detection circuit;

FIG. 6 is a flowchart showing the operation of the control unit in the case of a water leakage abnormality.

[Explanation of symbols]

 14 drainage means 15 water leakage storage part 16 water leakage detection part 17, 18 electrode H control means

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Daisuke Muraguchi 1-52, Oka, Minami-ku, Osaka-shi, Osaka F-term in Harman Co., Ltd. (reference) 2F014 AA16 DA01 2G067 AA22 BB11 CC01 DD07 DD22

Claims (4)

[Claims] 1. A water leakage storage unit for storing water leaking from a water storage unit, a water leakage detection unit including a pair of electrodes that are electrically connected to the water stored in the water leakage storage unit, and a state of current supply to the water leakage detection unit. And a control means for determining a water leakage abnormality based on detection information by the water leakage detection unit, wherein the control means determines that the water leakage abnormality, A water leakage detection device configured to stop power supply to a water leakage detection unit and maintain the power supply stop state. 2. The control device according to claim 1, wherein when a release operation for releasing a water leakage abnormality is performed, maintenance of the power supply stop state is released, and power supply to the water leakage detection unit is restored. Item 7. A water leakage detection device according to Item 1. 3. The control means is configured to, when a reset operation of a power supply to the control means is performed, determine that the release operation has been performed and return the power to the water leakage detection unit. 3. The leak detection device according to 2. 4. A drainage device for discharging water stored in the storage unit, wherein when the control unit determines that the water leakage is abnormal, the control unit activates the discharge unit and notifies the water leakage abnormality. The water leak detection device according to any one of claims 1 to 3, wherein the water leak detection device is configured to execute a water leak abnormality process for performing notification.