JP2005052792A - Operation control apparatus for water clarification device, method therefor, and clean water feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress power rates and water rates in facilities 10. <P>SOLUTION: The subject operation control method is applied to a water clarification device 31 provided inside facilities 10 where electricity is received from the outside. The integrated quantity of the electric power to be used within a prescribed time is predicted based on the quantity of the electric power to be received in the facilities 10. The operation of the water clarification device 31 is controlled so that the water level of a water clarification tank 33 secures the objective one within the range where the prediction does not exceed the upper limit of the previously set quantity of the electric power to be used (demand for the electric power). On the other hand, at the time when the water level of the tank falls below the water level in the lower limit, a water supply receiving valve 42 receiving water supply from the outside is controlled so as to be open, and the content of water required for the facilities 10 is secured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a purified water device for purifying domestic waste water, well water, and the like.

  Conventionally, in facilities such as factories, hotels, schools, etc. that use a lot of water, purified water that can reuse raw water such as domestic wastewater and well water to reduce tap water (city water) purchased from outside. In some cases, a purified water device that purifies water is used.

  Such a purified water apparatus generally uses electric power as a power source. For example, a purified water device using a reverse osmosis membrane (RO membrane) includes a power-driven pump or the like to feed raw water into the reverse osmosis membrane.

  However, if the purified water device is provided in various facilities, the peak of the power usage becomes high due to the power used by the purified water device, for example, the power that is often set according to the peak of the power usage As a result, the unit price increased, and as a result, the effect of reducing the cost of water supply by the purified water device was offset, and the electricity rate was sometimes high.

  An object of this invention is to provide the purified water apparatus which can suppress the cost of water supply while suppressing the increase in an electricity bill, its operation control apparatus, and the method.

  The present invention provides the following means.

  (1) An operation control device that is provided in a facility that receives power from outside and that controls operation of a purified water device that purifies raw water using electric power, and detects the amount of received power received by the facility. Received power amount detecting means; used power accumulated amount predicting means for predicting an accumulated amount of used power within a predetermined time based on the detected received power amount; purified water purified by the purified water device and received from outside The tank water level detecting means for detecting the tank water level of the purified water tank for storing the clean water, and the tank water level in advance within a range in which the predicted integrated amount of the used electric power does not exceed the preset upper limit of the used electric energy. Purified water device control means for driving and controlling the purified water device so as to secure the set target water level, and when the water level of the tank falls below a preset lower limit water level, Acceptance Operation control device for purifying water apparatus is characterized in that a water supply receiving valve control means for opening control, the.

  (2) The operation control apparatus for a purified water apparatus according to the preceding item 1, wherein the target water level is a target water level pattern that changes according to a time zone.

  (3) The operation control device for a purified water apparatus according to the preceding item 2, wherein the target water level pattern is a pattern according to the characteristics of each day from a plurality of preset patterns.

  (4) In addition to the case where the water tank water level falls below a preset lower limit water level, the water supply receiving valve control means is preset so as to satisfy the minimum receiving amount within a predetermined period for the water received from the outside. 4. The operation control device for a purified water apparatus according to any one of the preceding items 1 to 3, wherein the water supply valve is controlled to open according to a water supply pattern.

  (5) Provided with a water reception amount detection means for detecting the amount of water received, wherein the water reception valve control means has an integrated amount of the water reception amount from the start of the predetermined period within the predetermined period. 5. The operation control device for a purified water apparatus according to claim 4, wherein if the minimum amount received is satisfied, the open control of the water supply receiving valve according to the water supply receiving pattern is stopped during the predetermined period.

  (6) An operation control method using an operation control device of a purified water apparatus provided in a facility that receives power from outside and purifies raw water using electric power, and detects the amount of received power received by the facility And predicting the integrated amount of power used within a predetermined time based on the detected received power amount, and determining the water tank level of the purified water tank that stores purified water purified by the purified water device and clean water received from the outside. The purified water device is driven and controlled so that the water level of the aquarium secures a preset target water level within a range in which the detected and predicted integrated amount of the used electric power does not exceed the preset upper limit of the used electric energy. And when the said water tank water level falls below the preset lower limit water level, the operation control method of the purified water apparatus characterized by carrying out open control of the water-water receiving valve which receives water from the outside.

  (7) A purified water supply device provided in a facility that receives power from the outside, wherein the purified water device purifies the raw water using electric power, and receives the amount of power received by the facility. An electric power amount detecting means, an electric power accumulated amount predicting means for predicting an integrated amount of electric power used within a predetermined time based on the detected received electric power amount, and a purified water tank for storing purified water purified by the purified water device A clean water receiving path for receiving clean water from the outside to the purified water tank, a clean water receiving valve for opening and closing the clean water receiving path, a water distribution path for distributing the water stored in the purified water tank, and A tank water level detecting means for detecting the tank water level of the purified water tank, and a target water level in which the water tank water level is set in advance within a range in which the predicted integrated amount of the used power does not exceed a preset upper limit of the used power consumption. To ensure the purified water Purified water device control means for driving and controlling the water tank, and when the water level of the water tank falls below a preset lower limit water level, water supply valve control means for opening the water supply valve is provided. Purified water supply device characterized by the above.

  According to the operation control device, the method and the purified water supply device of the purified water apparatus according to the preceding items 1, 6 and 7, the cost of water supply can be reduced by obtaining purified water by the purified water apparatus. Moreover, since this purified water apparatus is operated and controlled within a range in which the amount of power used by the entire facility does not exceed a preset upper limit, an increase in power charges can be suppressed. In addition, while restricting the operation of the purified water control device in this way, when the water level of the purified water tank falls below the lower limit water level, fresh water is accepted, so that the necessary amount of water can be ensured.

According to the operation control device of the purified water apparatus according to the preceding item 2, by applying in advance the target water level pattern corresponding to the power usage pattern that varies depending on the time zone, the situation in which the purified water apparatus repeats starting and stopping, etc. Therefore, the operation of the purified water device can be efficiently controlled. ,
According to the operation control device of the purified water apparatus according to the preceding item 3, it is possible to set the appropriate target water level according to the characteristics of each day such as the day of the week and efficiently control the operation of the purified water apparatus.

  According to the operation control device of the purified water apparatus according to the preceding item 4, it is possible to reliably satisfy the minimum received amount of clean water.

  According to the operation control device of the purified water apparatus according to the preceding item 5, the received amount of clean water can be suppressed while reliably satisfying the minimum received amount of clean water.

  Hereinafter, the purified water supply apparatus concerning this invention is demonstrated.

  FIG. 1 is an overall configuration diagram schematically showing a purified water supply device according to the present invention.

  As shown in FIG. 1, the purified water supply device 11 is provided in a facility 10 that receives power from the outside. The power receiving path 20 through which the facility 10 receives power from the outside supplies power to the purified water supply device 11 and other electrical devices 19 through the power distribution path 22 in the facility 10.

  In this way, the fee of received power that the facility 10 receives from the outside depends on a contract with an electric power company or the like, but in general, the temporary maximum power consumption (power peak) generated during the contract period, and the contract period It is calculated based on the total power consumption. The maximum value (power peak) of temporary power consumption is the maximum value (so-called power demand) of the integrated amount of power used within a predetermined time (for example, 30 minutes) during the contract period (for example, one year). is there. For this reason, in general, there are many cases where the power charge is reduced by keeping the power peak (power demand) low.

  This facility 10 has a water supply receiving path 40 that receives supply of clean water (city water) from the outside.

  Regarding the reception of such water, there are cases where each local government or the like has been instructed to receive water that exceeds a predetermined minimum receiving amount from the viewpoint of hygiene. Specifically, it is required that the water in the tank be replaced twice or more in a predetermined period (for example, one day) so that the water in the tank that receives clean water is kept fresh. There is a case where the minimum amount received is twice the tank capacity.

  The water thus received and the purified water purified by the purified water supply device 11 are distributed to each device in the facility 10 via the water distribution path 35 of the purified water supply device 11.

  The purified water supply device 11 includes a purified water device 31 that purifies raw water into reusable purified water. The raw water is obtained from a raw water source 30 such as a well or a drainage channel, and is temporarily stored in the raw water tank 32 before being sent to the purified water device 31.

  The purified water device 31 is configured as a purified water device using a reverse osmosis membrane, for example, and includes a pump or the like for receiving the raw water and feeding the raw water into the reverse osmosis membrane. For this reason, this purified water device 31 requires drive power for driving. A part of the power received from the outside by the facility 10 is sent to the purified water device 31 via the power distribution path 22 and the dedicated power supply path 23.

  The purified water purified by the purified water device 31 is stored in the purified water tank 33 together with clean water (city water) received from the outside via the clean water receiving path 40.

  The purified water tank 33 is provided with a water tank water level meter (water tank water level detecting means) 34 for detecting the water level of the water tank. The aquarium water level information detected by the aquarium water level gauge 34 is used for operation control of the purified water device 31 as described later.

  A power receiving path 20 through which the facility 10 receives power from the outside is provided with a received power meter (received power amount detecting means) 21 that monitors the amount of power received by the facility 10. The received power amount information detected by the received power meter 21 is used for operation control of the purified water device 31 as described later. The received power meter 21 forms part of the purified water supply device 11 and functions as part of the operation control device of the purified water device 31.

  The water receiving path 40 where the facility 10 receives the supply of water from the outside includes a water receiving valve 42 that opens and closes the water receiving path 40 and a water receiving amount that detects the amount of water received by the facility 10. A total (water receiving amount detection means) 41 is provided. The water receiving valve 42 and the water receiving amount meter 41 form a part of the purified water supply device 11, and the water receiving amount meter 41 functions as a part of the operation control device of the purified water device 31. To do.

  The purified water supply device 11 having such a configuration includes an operation control device main body 50 that controls the operation of the purified water device 31 and the clean water receiving valve 42. The operation control device main body 50 is composed of, for example, a computer including a storage circuit such as a CPU, a RAM and a ROM, a storage device such as a hard disk drive, an input / output device such as a keyboard and a display device, and the like. The operation control device main body 50 functionally includes a power consumption integrated amount prediction unit 51, a purified water device control unit 52, and a clean water receiving valve control unit 53.

  Based on the received power amount information detected by the received power meter 21, the used power integrated amount predicting means 51 predicts the integrated amount of used power within a predetermined time in the entire facility 10. The accumulated amount of used power within a predetermined time is, for example, the accumulated amount of used power for 30 minutes, similarly to the power peak (power demand) in the calculation of the power charge described above.

  FIG. 2 is an explanatory diagram showing an example of a method for predicting the accumulated power consumption. In this example, the power consumption integrated amount predicting means 51 integrates the received power amount continuously or every predetermined sampling time from the start of a predetermined time (for example, 0 minutes per hour and 30 minutes per hour) to the present time. The accumulated amount of power used up to now is stored. Also, based on the current power consumption and the rate of change of the power consumption just before, the change in power consumption from the present to the end of the predetermined time is predicted, and thereby the power consumption accumulated from the present to the end is predicted. . Then, by summing the stored accumulated power consumption until now and the predicted accumulated power consumption until the end, the accumulated power consumption for the predetermined time is predicted.

  The purified water apparatus control means 52 drives the purified water apparatus 31 so that the water tank level of the purified water tank 33 secures the target water level within a range where the power consumption of the facility 10 does not exceed the upper limit (electric power demand). It is something to control. That is, when the amount of power used by the facility 10 is predicted to exceed the power demand, the purified water device control means 52 drives the purified water device 31 even if the tank water level cannot secure the target water level. Stop or reduce output. The reason why such control can be performed is that the necessary amount of water in the facility 10 can be secured by backup with clean water as will be described later.

  The purified water device control means 52 compares the power consumption integrated amount for the predetermined time predicted by the power consumption integrated amount prediction means 51 with a preset upper limit (power demand) of the power consumption. It is determined whether the amount of power used exceeds the upper limit during the predetermined time.

  The upper limit (power demand) of the amount of power used is set in advance by a facility administrator or the like, and is given to the purified water device control means 52. The upper limit of the power consumption is set as a target value by a facility administrator or the like based on, for example, the maximum value of power consumption by electrical equipment other than the purified water device 31, or determined by a contract with an electric power company, etc. You can set the value as it is.

  In addition, the purified water device control means 52 compares the water level of the purified water tank 33 detected by the water tank level gauge 34 with a preset target water level of the purified water tank 33, thereby purifying the purified water device 31. To determine whether or not to newly produce purified water.

  This target water level is set as a target water level pattern that changes according to the time zone. This target water level pattern is set in advance by a facility administrator or the like based on a survey of the variation pattern according to the time zone of the power used and the amount of water used, and is given to the purified water device control means 52. Further, a plurality of types of target water level patterns are set according to the characteristics of each day such as day of the week, public holidays, seasons, days with special events, and the like.

  FIG. 3 is an example of a variation pattern of power consumption and water consumption in a certain accommodation facility. In this accommodation, the amount of power used is large during the day and night, and is low from late night to early morning. On the other hand, the amount of water used tends to be high during the day and night, and low from late night to early morning. In this facility, if the purified water device 31 is driven in accordance with the amount of water used, it is expected that the driving power will increase the peak of the amount of power used during the day and night. In addition, the pattern for every characteristic of each day is obtained, such as averaging the data of the electric power and the amount of water used for such a day by the data of the day with which the characteristic approximates.

  FIG. 4 is an example of the target water level pattern according to the characteristics of each day. FIG. 4 (a) is for weekdays of the accommodation facility, FIG. 4 (b) is also for days before holidays, and FIG. 4 (c) is the same. For holidays.

  For example, according to the weekday target water level pattern of FIG. 4A, a high target water level is set up until noon when the amount of power used is high, and sufficient purified water is prepared. By lowering the pressure so as to refrain from driving the purified water device 31, it is possible to prevent the peak of the power consumption from being pushed up. Also, once in the afternoon when power consumption decreases, a high target water level is set again to prepare sufficient purified water, and at night when power consumption increases, the target water level is decreased again to refrain from driving the purified water device 31. It is supposed to let you.

  By using such a target water level pattern that varies depending on the time zone, since the upper limit (power demand) of the power consumption is close, it is possible to prevent the situation where the purified water device 31 repeatedly starts and stops, etc. Operation control can be performed. Furthermore, if the target water level pattern is changed according to the characteristics of each day, more efficient operation control can be realized.

  Hereinafter, the drive control procedure of the purified water apparatus 31 by the purified water apparatus control means 52 will be described with reference to the flowchart of FIG.

  This purified water device control means 52 adopts and sets a target water level pattern according to the characteristics of the day at the beginning of each day (for example, 3:00 am) determined as appropriate (step S12).

  Then, the purified water device control means 52 determines whether or not the current water tank level detected by the water tank level gauge 34 has reached the target water level according to this target water level pattern (step S14). YES), a stop control command for stopping the drive of the purified water device 31 is issued (step S16).

  On the other hand, if the aquarium water level has not reached the target water level (NO in step S14), the power consumption integrated amount predicted by the power consumption integrated amount predicting means 51 is the upper limit (power demand) of the power consumption set in advance. (Step S18), and only when the upper limit is not exceeded (NO in step S18), a drive control command for driving the purified water device 31 is issued (step S20). If the upper limit is exceeded (YES in step S18), the purified water device 31 is not driven, and if it is already driven, a stop control command is issued to stop it (step S16).

  Thereafter, step S14 and subsequent steps are repeated until the end of the day (for example, 3 am).

  When the water level of the purified water tank 33 falls below a predetermined lower limit water level, the upper water receiving valve control means 53 accepts the upper water from the upper water receiving path 40 and secures the water level higher than the lower limit water level. In addition, the water receiving valve 42 is controlled to open and close. That is, the reception of clean water by the clean water receiving valve control means 53 secures the necessary water amount in the facility 10 even when the purified water device 31 cannot secure a sufficient amount of water due to restrictions due to power demand. Act as a backup.

  The water receiving valve control means 53 compares the water level of the purified water tank 33 detected by the water tank level gauge 34 with a preset lower limit water level of the purified water tank 33, thereby providing a water receiving valve 42. And determine whether or not to back up by receiving water. The lower limit water level is set in advance by the facility manager or the like, and is given to the water receiving valve control means 53. As shown in FIG. 4, the lower limit water level is set below the target water level according to the target water level pattern. Yes.

  Further, the water receiving valve control means 53 is provided with a water receiving valve according to a preset water receiving pattern in order to ensure that the water is received at a predetermined minimum amount or more required from a sanitary viewpoint. The opening / closing control of 42 is also performed.

  This water supply acceptance pattern ensures that the minimum amount of water supply within a predetermined period (for example, one day) is satisfied even if no water supply for backup of the purified water device 31 has occurred. It is set in advance by a facility manager or the like, and is given to the water receiving valve control means 53.

  Specifically, in the same way as the target water level pattern of the purified water device control means 52 described above, the actual results of the fluctuation pattern according to the time zone of the used power and the used water amount of the facility 10, and the drive control of the purified water device 31 A plurality of types are set according to the characteristics of each day, such as days of the week, holidays, seasons, and days with special events.

  FIG. 6 is an example of a water reception pattern according to the characteristics of each day. FIG. 6 (a) is for weekdays of the accommodation facility, FIG. 6 (b) is for the day before holidays, and FIG. It is also for holidays.

  For example, according to the weekday clean water acceptance pattern of FIG. 6A, the clean water apparatus 31 is driven less by accepting clean water around noon or at night when the amount of water used is large but the amount of power used is large. The increase in the amount peak is prevented beforehand.

  Furthermore, the water supply valve control means 53 integrates the amount of water received detected by the water supply amount meter 53 from the beginning of a predetermined period in which the minimum amount of water received is calculated. If the minimum acceptance amount within the predetermined period is satisfied, the opening / closing control of the water supply valve 42 according to the water reception pattern is terminated during the predetermined period.

  That is, if the minimum amount of clean water received is secured by receiving clean water by backup of the purified water device 31, the clean water receiving valve control means 53 is used to back up the purified water device 31 thereafter. Only water is received. Thereby, while ensuring the minimum amount of water received, the amount of water received can be suppressed and the water bill can be reduced.

  Hereinafter, the opening / closing control procedure of the water receiving valve 42 by the water receiving valve control means 53 will be described with reference to the flowchart of FIG.

  The clean water receiving valve control means 53 adopts and sets a clear water receiving pattern according to the characteristics of the day at the beginning of each day (for example, 3:00 am) determined as appropriate (step S32). The start of setting this water supply acceptance pattern is matched with the start of a predetermined period (for example, one day) in which the minimum amount of water received is calculated.

  The water receiving valve control means 53 that has set the water receiving pattern determines whether the accumulated amount of water receiving has already satisfied the minimum receiving amount in the predetermined period (step S34), and only when it has not yet been satisfied. (NO in step S34), it is determined whether it is time to receive water based on the water receiving pattern (step S36). If it is time to receive clean water (YES in step S36), a valve opening command for receiving clean water is issued to the clean water receiving valve 42 (step S40).

  On the other hand, if the minimum amount received has already been satisfied by performing the backup of the purified water device 31 (YES in step S34), the water receiving based on the water receiving pattern is not performed (step S36 is skipped).

  If it is not the timing of receiving water based on the water receiving pattern (NO in step S36) or if the minimum amount of water received has already been satisfied (YES in step S34), the water is used as a backup for the purified water device 31. As acceptance determination, it is determined whether or not the water level of the purified water tank 33 is below the lower limit water level (step S38).

  If the result of this determination is that the aquarium water level is below the lower limit water level (YES in step S38), a valve opening command for accepting clean water is issued to the clean water receiving valve 42 as a backup of the purified water device 31 (step S38). S40) On the other hand, if the water tank water level is not below the lower limit water level (NO in step S38), a valve closing command is issued to stop the water supply reception to the water reception valve 42 (step S42).

  When a valve opening command is issued for receiving water based on the water receiving pattern or backing up the purified water device 31 (step S40), the amount of water received is detected by the water receiving amount meter 41. Therefore, the clean water receiving valve control means 53 accumulates this clean water receiving amount (step S44).

  The above-described series of control is repeated until the end of the predetermined period (NO in step S46). When the end of the predetermined period is reached (YES in step S46), the water supply is changed to the control for the next predetermined period. The accumulated amount of received water that has been accumulated each time it is received is reset (step S48), and the process returns to step S32.

  As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to the said embodiment, In the range of the summary, it can change suitably. Specifically, it can be changed as follows, for example.

  (1) In the above embodiment, all the power used by the facility 10 is received from the outside. However, the facility 10 includes a power generation facility such as a cogeneration system and is used together with the power received from the outside. May be.

  (2) In the above embodiment, the purified water device control means 52 controls only the drive and stop of the purified water device 31, but changes the operation output of the purified water device 31 stepwise or continuously. Control may be performed. In this case, for example, the operation output of the purified water device 31 can be changed according to the degree of shortage of the tank water level from the target water level (full water).

  (3) In the above-described embodiment, the configuration of the water supply receiving valve 42 is merely illustrated as switching between the open state and the closed state, but the flow rate control is performed so that the amount of water supply received can be set stepwise or continuously. The water supply receiving valve control means 53 may be configured to adjust and control the water supply receiving flow rate by the water supply receiving valve 42.

It is a whole block diagram which shows typically the purified water supply apparatus concerning this invention. It is explanatory drawing which showed an example of the prediction method of this electric power usage amount. It is an example of the fluctuation pattern of the electric power used and the amount of water used in a certain accommodation facility. It is an example of a target water level pattern. It is a flowchart which shows the control procedure of a purified water apparatus. It is an example of a water supply acceptance pattern. It is a flowchart which shows the control procedure of a water receiving valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Facility 11 Purified water supply apparatus 20 Power receiving path 21 Power receiving power meter (Receiving power amount detecting means)
30 Raw Water Source 31 Purified Water Device 33 Purified Water Tank 34 Aquarium Water Level Meter (Aquarium Water Level Detection Means)
40 Water Receiving Route 41 Water Receiving Amount Meter (Water Receiving Amount Detection Means)
42 Water Supply Receiving Valve 50 Operation Control Device Body 51 Integrated Electric Power Consumption Predicting Means 52 Purified Water Device Control Means 53 Water Water Receiving Valve Control Means

Claims (7)

An operation control device that is installed in a facility that receives power from outside and that controls operation of a purified water device that purifies raw water using electric power,
A received power amount detecting means for detecting a received power amount received by the facility;
A power consumption integrated amount prediction means for predicting a cumulative amount of power used within a predetermined time based on the detected received power amount;
A tank water level detecting means for detecting a water level of a purified water tank for storing purified water purified by the purified water device and clean water received from outside;
Purified water that drives and controls the purified water device so that the water level of the aquarium ensures a preset target water level within a range in which the predicted integrated amount of used electric power does not exceed the preset upper limit of the used electric energy Device control means;
When the water level of the aquarium falls below a preset lower limit water level, water supply valve control means for opening and controlling a water supply valve that receives water from outside,
An operation control device for a purified water device.   The operation control apparatus for a purified water apparatus according to claim 1, wherein the target water level is a target water level pattern that changes according to a time zone.   The operation control device for a purified water apparatus according to claim 2, wherein the target water level pattern is a pattern according to a characteristic of each day from a plurality of preset patterns.   In addition to the case where the water level of the water tank falls below a preset lower limit water level, the water supply receiving valve control means is configured to receive water set in advance so as to satisfy a minimum received amount within a predetermined period of water received from the outside. The operation control device for a purified water apparatus according to any one of claims 1 to 3, wherein the water supply valve is controlled to open according to a pattern. Provided with a received water amount detection means for detecting the received amount of clean water,
If the integrated amount of the received water amount from the beginning of the predetermined period satisfies the minimum received amount within the predetermined period, the water supply valve control means responds to the water reception pattern during the predetermined period. The operation control device for a purified water apparatus according to claim 4, wherein opening control of the water supply valve is stopped. An operation control method by an operation control device of a purified water device that is provided in a facility that receives power from outside and purifies raw water using electric power,
Detecting the amount of power received by the facility,
Based on the detected received power amount, predict the accumulated amount of power used within a predetermined time,
Detecting the water level of a purified water tank that stores purified water purified by the purified water device and clean water received from outside,
Within a range in which the predicted integrated amount of power used does not exceed the preset upper limit of power usage, the purified water device is driven and controlled so as to ensure the target water level set in advance.
An operation control method for a purified water apparatus, wherein when the water level of the water tank falls below a preset lower limit water level, an open water receiving valve for receiving clean water from outside is controlled to open. A purified water supply device provided in a facility that receives power from outside,
A purified water device that purifies raw water using electric power;
A received power amount detecting means for detecting a received power amount received by the facility;
A power consumption integrated amount prediction means for predicting a cumulative amount of power used within a predetermined time based on the detected received power amount;
A purified water tank for storing purified water purified by the purified water device;
A water receiving path for receiving clean water from the outside into the purified water tank;
A water receiving valve for opening and closing the water receiving path;
A water distribution path for distributing water stored in the purified water tank;
A tank water level detection means for detecting the water level of the purified water tank;
Purified water that drives and controls the purified water device so that the water level of the aquarium ensures a preset target water level within a range in which the predicted integrated amount of used electric power does not exceed the preset upper limit of the used electric energy Device control means;
When the water level of the aquarium falls below a preset lower limit water level, a water receiving valve control means for controlling the opening of the water receiving valve;
A purified water supply device comprising:

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