Drain water recovery guidance device, drain water recovery guidance method, and drain water recovery guidance program

Abstract

To provide a drain water recovery guidance device, a method and a program which support determination of timing at which drain water is recovered.SOLUTION: A drain water recovery guidance device comprises: a water level acquisition unit which can acquire water level information indicating which water level of the plurality of water levels including a first water level, a second water level higher than the first water level, and a third water level higher than the second water level, water reaches; a prediction time determination unit which acquires prediction time predicted to be required for the water to transit between the second water level and the third water level as second transition prediction time, from a storage unit which stores prediction time predicted to be required for the water to transit between adjacent water levels including the first water level, the second water level and the third water level, when the water level information indicates that the water reaches the second water level; and a notification control unit which outputs a notification control signal for notifying the acquired second transition prediction time.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a drain water recovery guide technology. [Background technology]

[0002] Patent Document 1 discloses a technology for detecting the liquid level in a drain tank using a ball chain. Patent Document 1 also describes that it may be possible to notify when a predetermined liquid level has been reached, and that it may be possible to detect multiple liquid levels (paragraph 0027 of Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-124371 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology of Patent Document 1 makes it possible to notify that a predetermined liquid level among a plurality of liquid levels has been reached. However, there is a problem in that the timing at which the notification that the predetermined liquid level has been reached is not necessarily an appropriate time to collect drain water.

[0005] The present disclosure has been made to solve such problems, and aims to provide a drain water recovery guidance technology that assists in determining the timing to recover drain water. [Means for solving the problem]

[0006] One aspect of a drain water recovery guide device according to an embodiment of the present disclosure includes a water level acquisition unit capable of acquiring water level information indicating which of multiple water levels including a first water level, a second water level higher than the first water level, and a third water level higher than the second water level has been reached; a predicted time determination unit that, when the water level information indicates that the second water level has been reached, acquires, as a second transition predicted time, a predicted time predicted to be required to transition between the second water level and the third water level from a memory unit that stores a predicted time predicted to be required to transition between adjacent water levels including the first water level, the second water level, or the third water level; and an alarm control unit that outputs an alarm control signal to notify the acquired second transition predicted time. [Effects of the Invention]

[0007] The drain water recovery guide device according to the embodiment of the present disclosure can assist in determining the timing to recover drain water. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing an example of the configuration of a drain water recovery guide system including a drain water recovery guide device. [Figure 2] 1 is a block diagram showing a configuration example of a drain water recovery guide device. [Figure 3] 10 is a flowchart showing an example of a drain water recovery guidance method. [Figure 4] 10 is a flowchart showing a modified example of the process for determining a predicted time. [Figure 5] 10 is a flowchart of a drain water recovery guidance method (predicted time master data update process). [Figure 6] 10 is a table illustrating an example of master data. DETAILED DESCRIPTION OF THE INVENTION

[0009] Various embodiments of the present disclosure will be described in detail below with reference to the drawings. In the drawings, identical or similar parts are designated by identical or similar reference numerals, and redundant explanations of such parts will be omitted. In addition, in this disclosure, the term "or" is used to mean an inclusive logical OR unless otherwise specified.

[0010] Embodiment 1 <Configuration> A drain water recovery guide system including a drain water recovery guide device 4 according to a first embodiment of the present disclosure will be described with reference to Fig. 1. Fig. 1 is a diagram showing an example of the configuration of the drain water recovery guide system.

[0011] (Drain water recovery guide system) As an example, as shown in Figure 1, the drain water recovery guidance system comprises a drain tank 1, a ball chain 2 for detecting the water level stored in the drain tank 1, a voltage detection circuit 3 for outputting the voltage detected by the ball chain 2, and a drain water recovery guidance device 4 for providing guidance on the recovery of drain water based on the voltage detected by the voltage detection circuit 3.

[0012] The drain tank 1 is installed in a showcase such as a refrigeration unit (not shown) used in the food section of a supermarket or department store. The drain tank 1 is a tank for storing drain water discharged from the showcase. To prevent the water stored in the drain tank 1 from overflowing, it is necessary to collect the water stored in the drain tank 1 at an appropriate time before it becomes full.

[0013] (Water level sensor: ball chain, voltage detection circuit) The ball chain 2 and voltage detection circuit 3 are an example of a water level sensor for detecting the water level of water stored in the drain tank 1. The ball chain 2 is a tool for detecting the water level of water stored in the drain tank 1 and is a conductive chain formed by connecting multiple conductive spheres. To detect the water level, two ball chains (not shown) are used as the ball chain 2. One of the two ball chains is for detection, and the other is for grounding. The two ball chains are suspended from a support member (not shown) so that they hang down under their own weight inside the drain tank 1. The ball chain 2 is electrically connected to the voltage detection circuit 3, which applies an AC voltage to the ball chain 2. Because water is conductive, when water is stored in the drain tank 1 and comes into contact with the two ball chains, a closed circuit is formed and current flows. The more water is stored, the more current flows. The voltage detection circuit 3 detects the magnitude of the flowing current as a voltage using a resistor (not shown). For example, the voltage detection circuit 3 is configured to output 0V when the drain tank 1 is at a waterless level (hereinafter sometimes referred to as the "first water level"), 1V when the drain tank 1 is at a water level of 1 / 3 full (hereinafter sometimes referred to as the "second water level"), 2V when the drain tank 1 is at a water level of 2 / 3 full (hereinafter sometimes referred to as the "third water level"), and 3V when the drain tank 1 is at a water level of full (hereinafter sometimes referred to as the "fourth water level"). Note that the circuit may be configured to detect the water level in multiple stages other than four. The following describes such a relationship between water level and voltage as an assumed example. When the drain water stored in the drain tank 1 is collected, the voltage detection circuit 3 starts detecting a new water level. The voltage detection circuit 3 outputs the detected voltage.

[0014] In Figure 1, a ball chain 2 and a voltage detection circuit 3 are shown as an example of a water level sensor for detecting the water level stored in the drain tank 1, but the water level of the drain tank 1 may also be detected using various other well-known water level sensors.

[0015] (Drain water recovery guide device) The drain water recovery guide device 4 is a device for providing guidance on the recovery of drain water based on water level information indicating the water level detected by a water level sensor. The drain water recovery guide device 4 is placed in the showcase together with the drain tank 1. In the system configuration example of Fig. 1, the drain water recovery guide device 4 performs processing based on the output voltage of the voltage detection circuit 3 which serves as a water level sensor.

[0016] To achieve such functions, the drain water recovery guide device 4 has a hardware configuration including a processor 41 as a computer, a memory 42 that functions as a storage unit, a timer 43, and an input / output IF (input interface / output interface) 44, as shown in Figure 2.

[0017] (Processor) The processor 41 may include, as functional blocks, a water level acquisition unit 411, an elapsed time acquisition unit 412, a user time acquisition unit 413, a predicted time determination unit 414, a predicted time master data update unit 416, and a notification control unit 417. The processor 41 realizes the functions of these functional units by reading and executing programs stored in the memory 42.

[0018] (Memory) Examples of memory 42 include non-volatile or volatile semiconductor memory such as RAM (random access memory), ROM (read-only memory), flash memory, EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), magnetic disk, flexible disk, optical disk, compact disk, mini disk, or DVD.

[0019] (Timer) The timer 43 is a device for measuring time and supplies the measured time to the processor 41.

[0020] (Input / output interface) The input / output IF44 is a device for sending and receiving information to and from the outside of the drain water recovery guide device 4. For example, the outside of the drain water recovery guide device 4 may include a user of the drain water recovery guide device 4 or a central management device for managing multiple drain water recovery guide devices including the drain water recovery guide device 4. Examples of the input / output IF44 include a key switch for accepting user input, a display device for outputting information, a speaker, or a communication device for communicating with the central management device.

[0021] (Water level acquisition section) The water level acquisition unit 411 is a functional unit that acquires water level information indicating the water level from a water level sensor such as the voltage detection circuit 3. In the example of Fig. 1, the water level acquisition unit 411 acquires voltage as water level information from the voltage detection circuit 3. The water level acquisition unit 411 supplies the acquired water level information to other functional units.

[0022] (Elapsed time acquisition unit) The elapsed time acquisition unit 412 is a functional unit that acquires the elapsed time until each of a plurality of predetermined water levels is reached. For example, in the above-described assumed example, the elapsed time until the water level reaches the second water level, the elapsed time until the water level reaches the third water level, or the elapsed time until the water level reaches the fourth water level is acquired. The elapsed time acquisition unit 412 acquires each elapsed time from the timer 43 using the time when each water level is reached as a trigger. The elapsed time acquisition unit 412 supplies the acquired elapsed time together with information about the measured intervals between the water levels to other functional units. The elapsed time acquisition unit 412 may also store the acquired elapsed time in the memory 42 together with information about the measured intervals between the water levels.

[0023] (User time acquisition part) The user time acquisition unit 413 is a functional unit that acquires collectable time periods or non-collectable time periods set by the user of the drain water collection guidance device 4. The collectable time periods are time periods set as convenient time periods for the user to collect drain water. The non-collectable time periods are time periods set as inconvenient time periods for the user to collect drain water. At least one of the collectable time periods or non-collectable time periods is set by the user. For example, if the drain water collection guidance device 4 is used in a supermarket, the time periods outside the supermarket's business hours (e.g., 22:00-9:00) are set as collectable time periods, and the supermarket's business hours (e.g., 9:00-22:00) are set as non-collectable time periods. The user time acquisition unit 413 acquires the collectable time periods or non-collectable time periods set by the user via the input / output IF 44, such as a key switch.

[0024] (Prediction time determination unit) In one aspect, the predicted time determination unit 414 is a functional unit that, when the water level indicated by the water level information reaches a predetermined water level, acquires a predicted time predicted to be required for the water level to reach the next water level higher than the predetermined water level. For example, in accordance with the above-mentioned assumed example, when the water level information indicates a first water level (water level without water), the predicted time determination unit 414 acquires a predicted time predicted to be required for the water level to transition between the first water level and the second water level (hereinafter, sometimes referred to as the "first predicted transition time"). Furthermore, when the water level information indicates that the water level has reached a second water level (water level one-third full), the predicted time determination unit 414 acquires a predicted time predicted to be required for the water level to transition between the second water level and the third water level (hereinafter, sometimes referred to as the "second predicted transition time"). Furthermore, when the water level information indicates that the water level has reached the third water level (two-thirds of the full water level), the predicted time determination unit 414 acquires the predicted time (hereinafter, sometimes referred to as the "third transition predicted time") required for the water level to transition between the third and fourth water levels. These predicted times, including the predicted transition times, are associated with the transitions between water levels and stored as master data, for example, in the memory 42. The master data may be stored in a memory (not shown) of the central management device instead of the memory 42. In this case, the drain water recovery guide device 4 acquires the master data via the input / output IF 44. The master data is stored, for example, as data in a table format as shown in FIG. 6. The table in FIG. 6 indicates that the first predicted transition time from the first water level to the second water level is 24 hours, the second predicted transition time from the second water level to the third water level is 24 hours, and the third predicted transition time from the third water level to the fourth water level is 20 hours.

[0025] Master data may be prepared for each season. For example, four master data sets may be prepared: master data for spring, master data for summer, master data for autumn, and master data for winter. For example, master data for a season including the rainy season may be set to a shorter time than master data for other seasons because the water level rises relatively quickly. Conversely, master data for a season including the dry season may be set to a longer time than master data for other seasons because the water level rises relatively slowly. When master data is prepared for each season, the prediction time determination unit 414 determines the current season and, based on the determination result, obtains the prediction time corresponding to the determined current season. The current season is determined, for example, using time information output by the timer 43.

[0026] When the water level indicated by the water level information reaches a predetermined water level, the predicted time determination unit 414 accesses the memory 42 to acquire each predicted transition time. The predicted time determination unit 414 supplies the acquired predicted transition times to other functional units.

[0027] In one aspect, if the elapsed time from one water level to the next water level is shorter than the corresponding transition predicted time between those water levels, the predicted time determination unit 414 may update the transition predicted time from the next water level to the next water level so that the transition predicted time defined as the transition predicted time from the next water level to the next water level becomes shorter. For example, in the above-mentioned assumed example, if the elapsed time from the measured first water level to the second water level (hereinafter sometimes referred to as the "first elapsed time") is shorter than the first transition predicted time, the predicted time determination unit 414 updates the second transition predicted time acquired from the master data so that the second transition predicted time becomes shorter. Similarly, if the elapsed time from the measured second water level to the third water level (hereinafter sometimes referred to as the "second elapsed time") is shorter than the second transition predicted time, the predicted time determination unit 414 updates the second transition predicted time acquired from the master data so that the third transition predicted time becomes shorter.

[0028] Explaining this using the example data in Figure 6, if the elapsed time from the measured first water level to the second water level is 20 hours, the predicted transition time from the second water level to the third water level may be determined by subtracting 4 hours, which is the difference between the first predicted transition time (the predicted transition time from the first water level to the second water level: 24 hours) and the actually measured elapsed time (20 hours), from the second predicted transition time (the predicted transition time from the second water level to the third water level), which is 24 hours. Similarly, the predicted transition time from the third predicted transition time (the predicted transition time from the third water level to the fourth water level), which is 20 hours, may be determined by subtracting this difference, which is 16 hours.

[0029] If the difference is a negative value, the subtraction may result in an added time. For example, if the elapsed time from the measured first water level to the second water level is 27 hours, the difference obtained by subtracting the actually measured elapsed time (27 hours) from the first transition predicted time (24 hours) is -3 hours, and the resulting 27 hours may be determined as the predicted transition time from the second water level to the third water level.

[0030] (Predicted Time Master Data Update Section) The predicted time master data update unit 416 is a functional unit that counts the number of cases where the elapsed time in each measurement measured by the elapsed time acquisition unit 412 is different by more than a predetermined time as a predicted time between water levels corresponding to each measurement, and if the number of counted cases is greater than half of the number of measurements, updates the corresponding predicted time as master data based on the elapsed time related to the case where it is counted as being different by more than the predetermined time. For example, in the above-mentioned assumed example, the number of cases where it is different by more than a predetermined time (e.g., 30 minutes) from the first predicted time is counted, and if the number of counted cases is greater than half of the number of measurements, updates the first predicted time as master data based on the elapsed time related to the case where it is counted as being different by more than the predetermined time.

[0031] (Notification control unit) The notification control unit 417 is a functional unit that outputs a notification control signal that notifies the predicted time acquired by the predicted time determination unit 414. For example, in the assumed example described above, when the second water level is reached, the notification control signal is output to notify the second predicted transition time, which is the predicted time until the third water level is reached. Also, when the third water level is reached, the notification control signal is output to notify the third predicted transition time, which is the predicted time until the fourth water level is reached.

[0032] In accordance with the notification control signal, for example, the input / output IF 44 issues a notification using text, sound, or an image. When issuing a notification using text or an image, the input / output IF 44 is a display device. When issuing a notification using sound, the input / output IF 44 is a speaker. The notification control signal may be transmitted to an external device such as a mobile terminal via the input / output IF 44, and the notification may be issued by the external device. In this way, the input / output IF 44 operates to issue a notification in accordance with the notification control signal. The notification may be issued by the input / output IF 44, or by the external device.

[0033] To explain based on the above-mentioned assumed example, when the second water level is reached, a notification is given as to how many hours it will take to reach the third water level. Along with this notification, a notification may be given as to whether the time when the third water level is expected to be reached falls within a time period when the water is retrievable or unretrievable set by the user. Similarly, when the third water level is reached, a notification is given as to how many hours it will take to reach the fourth water level. Along with this notification, a notification may be given as to whether the time when the fourth water level is expected to be reached falls within a time period when the water is retrievable or unretrievable set by the user.

[0034] <Operation> Next, the operation of the drain water recovery guide device 4 will be described with reference to FIG.

[0035] (Step ST31) In step ST31, the water level acquisition unit 411 acquires water level information indicating the water level of the drain tank 1 from a water level sensor that detects the water level of the drain tank 1.

[0036] (Step ST32) In step ST32, when the water level indicated by the water level information reaches a predetermined water level, the predicted time determination unit 414 accesses memory 42 to obtain the predicted time required to reach the next water level higher than the predetermined water level, and determines the obtained predicted time as the predicted time to be notified.

[0037] (Step ST33) Step ST33 is an optional step and may be omitted. When step ST33 is executed, the user time acquisition unit 413 acquires the collectable time period or the non-collectable time period.

[0038] (Step ST34) In step ST34, the notification control unit 417 outputs a notification control signal that controls the output interface to notify the predicted time acquired in step ST32. If the user time acquisition unit 413 acquires a recoverable time slot or an unrecoverable time slot in step ST33, the notification control unit 417 may output a notification control signal that controls the output interface to notify whether the time when the next water level will be reached falls within the recoverable time slot or the unrecoverable time slot in step ST34.

[0039] If the output interface is a display device, the display device displays the time until the next water level is reached by text or an image in accordance with the notification control signal. A time period during which recovery is possible or unrecoverable may be displayed together with this display. If the output interface is a speaker, the speaker notifies the user of the time until the next water level is reached by sound in accordance with the notification control signal. A time period during which recovery is possible or unrecoverable may be displayed together with this notification.

[0040] According to the aspect of the first embodiment, when a certain lower water level is reached, notification control is performed so as to notify the user of the predicted transition time until the next higher water level is reached. Therefore, by being notified of the predicted transition time, the user can determine whether the time after the predicted transition time has passed is appropriate for collecting drain water. This can help determine the timing to collect drain water.

[0041] Furthermore, by providing the user time acquisition unit 413, the notification control unit 417 performs notification control to notify whether the time after the acquired transition prediction time has elapsed from the current time at which the transition prediction time was acquired falls within the user's collection time period or non-collection time period. This allows the drain water collection guide device 4 to decide whether the time after the transition prediction time has elapsed is appropriate for collecting drain water, thereby further assisting in determining the timing to collect drain water.

[0042] <Variation 1> The above process of determining the predicted time in step ST32 may be modified as shown in the flow chart of FIG.

[0043] (Step ST41) In step ST41, when the water level indicated by the water level information reaches a predetermined water level (for example, the second water level), the predicted time determination unit 414 accesses the memory 42 and obtains the predicted time (first transition predicted time) that is predicted to be required to reach the predetermined water level and the predicted time (second transition predicted time) that is predicted to be required to reach the next water level that is higher than the predetermined water level.

[0044] (Step ST42) In step ST42, the elapsed time acquisition unit 412 acquires the elapsed time (first elapsed time) until the water level reaches the predetermined water level (for example, the second water level).

[0045] (Step ST43) In step ST43, the predicted time determination unit 414 determines whether the first elapsed time, which is an actual measurement value, is earlier than the first transition predicted time, which is a predicted value. If it is earlier (YES), the process proceeds to step ST44. If it is not earlier (NO), the process proceeds to step ST46.

[0046] (Step ST44) In step ST44, the predicted time determination unit 414 updates the acquired second transition predicted time based on the difference between the first elapsed time and the first transition predicted time. For example, the difference is subtracted from the acquired second transition predicted time. As another example, the difference is multiplied by a certain coefficient, and the result is subtracted from the acquired second transition predicted time.

[0047] (Step ST45) In step ST45, the predicted time determination unit 414 determines the second transition predicted time after being updated in step ST44 as the predicted time to be notified.

[0048] (Step ST46) In step ST46, the predicted time determination unit 414 determines the acquired second transition predicted time as the predicted time to be notified.

[0049] After the processing of step ST44 or step ST46 is performed, the processing returns to FIG. 3, and the processing of step ST33 or step ST34 is performed.

[0050] According to Modification 1, if the actual measured value of the transition time between certain levels is earlier than the predicted time of the transition between the corresponding levels, the predicted time of the transition between the next levels is updated based on the earlier time. Similarly, if the actual measured value of the transition time between certain levels is later than the predicted time of the transition between the corresponding levels, the predicted time of the transition between the next levels may be updated based on the later time. This allows the predicted transition time to be corrected adaptively to the actual environment, thereby enabling more accurate notification to the user.

[0051] <Variation 2> Modification 2 is an aspect in which the master data is updated based on actual measurement values. The operation of the drain water recovery guide device 4 according to Modification 2 will be described with reference to FIG.

[0052] (Step ST51) In step ST51, the predicted time master data update unit 416 accesses the memory 42 and tallies the elapsed time required for transitions between a plurality of water levels and the corresponding predicted transition times between the water levels.

[0053] For example, when aggregating data on the transition from the second water level to the third water level, the predicted time master data update unit 416 acquires five pieces of data, namely, 24 hours as data 1, 20 hours as data 2, 20 hours as data 3, 21 hours as data 4, and 19 hours as data 5, which are the actual measured values ​​of the time required for the transition from the second water level to the third water level. The predicted time master data update unit 416 also acquires from the memory 42 a second transition predicted time, which is the predicted time from the second water level to the third water level.

[0054] The processing of step ST51 may be performed, for example, at the change of seasons, i.e., at the timing when the master data prepared for each season is switched.

[0055] (Step ST52) In step ST52, the predicted time master data update unit 416 determines whether the number of actual measurement data items that are outside the master data time is greater than half the number of actual measurement data items. In the case of the five data examples described above, the number of cases where the actual measurement values ​​of data items 1 to 5 are outside the master data time (24 hours) is counted, and it is determined whether the number of counted cases is greater than half the number of measurements. Whether or not the time is outside the master data time is determined based on whether or not the time is separated by a predetermined threshold time, for example, one hour or more. In the case of the five data examples described above, when the threshold time is one hour, data item 1 (24 hours) is less than the threshold time, so it is counted as not being outside the master data time. As for data items 2 to 5, they are all separated by more than the threshold time, so they are counted as not being outside the master data time. The number of cases where the time is outside the master data time is four, which is greater than half of the number of measurements (5), so the process proceeds to step ST53. If the number of counted cases is not greater than half the number of measurements, the flow in FIG. 5 ends.

[0056] (Step ST53) In step ST53, the predicted time master data update unit 416 updates the master data based on the actually measured elapsed time. As an example, in the case of the above-mentioned five data examples, the second transition predicted time is updated based on the elapsed time when it is counted as a time other than that of the master data, i.e., data 2 to data 5. For example, the average value of data 2 to data 5 is calculated, and the master data is updated based on the calculated average value. The average value of data 2 to data 5 is (20 + 20 + 21 + 19) / 4 [hours] = 20 [hours].

[0057] The above description has been given in connection with the transition from the second water level to the third water level, but the master data may be updated in a similar manner for transitions between other water levels.

[0058] According to Modification 2, the master data can be adapted to the actual environment. When master data for each season is prepared, the master data can be modified to adapt to the actual environment on a seasonal basis.

[0059] Although the master data update process in Modification 2 has been described as being performed by the drain water recovery guide device 4, the master data update process may also be performed by a central management device communicably connected to multiple drain water recovery guide devices. In this case, the central management device includes an elapsed time acquisition unit that acquires, from the multiple drain water recovery guide devices, the time required for transitions between multiple water levels recorded by each drain water recovery guide device, and a predicted time master data update unit that counts the number of times the elapsed time in each measurement deviates from the predicted time by more than a predetermined time, and updates the predicted time based on the elapsed time when the counted number of times is greater than half of the number of measurements. In this case, the central management device that performs the master data update process constitutes the drain water recovery guide device as a master device, and the drain water recovery guide device 4 as a slave device that acquires water levels and controls reporting.

[0060] It is possible to combine the embodiments, and to modify or omit each embodiment as appropriate. [Industrial Applicability]

[0061] The drain water recovery guide device of the present disclosure can be used as a device for informing users of the time to recover water accumulated in a drain tank. [Explanation of symbols]

[0062] 1 Drain tank, 2 Ball chain (water level sensor), 3 Voltage detection circuit (water level sensor), 4 Drain water recovery guide device, 41 Processor, 42 Memory, 43 Timer, 44 Input / output IF, 411 Water level acquisition unit, 412 Elapsed time acquisition unit, 413 User time acquisition unit, 414 Predicted time determination unit, 416 Predicted time master data update unit, 417 Notification control unit.

Claims

1. a water level acquiring unit capable of acquiring water level information indicating which of a plurality of water levels including a first water level, a second water level higher than the first water level, and a third water level higher than the second water level has been reached; a predicted time determination unit that, when the water level information indicates that the second water level has been reached, acquires, as a second transition predicted time, a predicted time that is predicted to be required for a transition between the second water level and the third water level from a storage unit that stores predicted times that are predicted to be required for a transition between adjacent water levels including the first water level, the second water level, or the third water level; a notification control unit that outputs a notification control signal for notifying the acquired second transition predicted time; A drain water recovery guide device comprising:

2. The prediction time is determined for each season, the predicted time determination unit determines a current season, and based on a result of the determination, obtains a predicted time corresponding to the determined current season from the storage unit; 2. The drain water recovery guide device according to claim 1.

3. a user time acquisition unit that acquires a time period during which drain water can be collected or a time period during which drain water cannot be collected; Further provided with the notification control unit outputs a notification control signal for notifying whether a time after the second transition predicted time has elapsed from the current time at which the second transition predicted time is acquired belongs to the acquired collectable time period or the acquired non-collectable time period.

2. The drain water recovery guide device according to claim 1.

4. further comprising an elapsed time acquisition unit capable of acquiring a first elapsed time from the first water level to the second water level; the predicted time determination unit acquires a predicted time required for a transition between the first water level and the second water level as a first transition predicted time, and updates the acquired second transition predicted time based on a difference between the first transition predicted time and the first elapsed time; the notification control unit outputs a notification control signal for notifying the second transition predicted time after the update.

2. The drain water recovery guide device according to claim 1.

5. the predicted time determination unit updates the acquired second transition predicted time by subtracting a difference obtained by subtracting the first elapsed time from the first transition predicted time from the acquired second transition predicted time.

5. A drain water recovery guide device according to claim 4.

6. an elapsed time acquisition unit that acquires the elapsed time between adjacent water levels each time a measurement is performed; a predicted time master data update unit that counts the number of cases where the elapsed time in each measurement is different from the predicted time determined for the adjacent water levels by a predetermined time or more, and if the number of counted cases is greater than half of the number of measurements, updates the predicted time determined for the adjacent water levels based on the elapsed time of the cases counted as being different from the predetermined time or more; The drain water recovery guide device according to claim 1 , further comprising:

7. further comprising an input interface for receiving the collectable time period or the non-collectable time period; 4. A drain water recovery guide device according to claim 3.

8. further comprising an output interface that performs an operation for making a notification in accordance with the notification control signal; The drain water recovery guide device according to any one of claims 1 to 7.

9. A drain water recovery guidance method performed by a drain water recovery guidance device including a water level acquisition unit, a predicted time determination unit, and a notification control unit, a step in which the water level acquisition unit acquires water level information indicating which of a plurality of water levels including a first water level, a second water level higher than the first water level, and a third water level higher than the second water level has been reached; When the water level information indicates that the second water level has been reached, the predicted time determination unit acquires, as a second transition predicted time, a predicted time required for a transition between the second water level and the third water level from a storage unit that stores predicted times required for a transition between adjacent water levels including the first water level, the second water level, or the third water level; a step of outputting a notification control signal by the notification control unit to control an output interface so as to notify the acquired second transition predicted time; A drain water recovery guidance method comprising:

10. a function of acquiring water level information indicating which of a plurality of water levels including a first water level, a second water level higher than the first water level, and a third water level higher than the second water level has been reached; a function of acquiring, when the water level information indicates that the second water level has been reached, a predicted time required for a transition between the second water level and the third water level from a storage unit that stores predicted times required for a transition between adjacent water levels including the first water level, the second water level, or the third water level, as a second transition predicted time; a function of outputting a notification control signal for controlling an output interface so as to notify the acquired second transition predicted time; A drain water recovery guidance program that causes a computer to execute the above.

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