Diagnostic device, diagnostic system, diagnostic method, and program

Abstract

A diagnostic device is provided with: a measurement value acquisition unit (110) that acquires a measurement value for each of a plurality of measurement items measured by one or a plurality of measurement instruments that measure the plurality of measurement items with respect to an electrodeionized water production device; a calculation unit (120) that calculates individual predicted lifetimes on the basis of the measurement values acquired by the measurement value acquisition unit (110); a prediction unit (130) that predicts the shortest individual predicted life among the plurality of individual predicted lives calculated by the calculation unit (120) as the predicted life of the electrodeionized water production apparatus; and an output unit (140) that outputs information corresponding to the predicted life predicted by the prediction unit (130).

Description

Technical Field

[0001] The present invention relates to a diagnostic device, a diagnostic system, a diagnostic method and a program. Background Art

[0002] A water treatment device for improving water quality needs to be replaced after being used for a specified period of time. For example, consider a device that predicts the end of the life of a water purification filter based on the amount of water passing through the water purification filter per unit time, and sends a life signal before the end of the life (for example, refer to Patent Document 1). Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2018-202286 Summary of the invention Technical problem to be solved by the invention

[0004] In the above technology, the only measurement item used to calculate the life of the water treatment device is the water flow rate. Therefore, when the measured value of the water flow rate changes in a good direction for some reason, the predicted life arrival period becomes later than the period when replacement is actually required. In this case, the water treatment device that needs to be replaced will continue to be used. As a result, water of the desired water quality cannot be obtained. In this way, it may not be possible to indicate the accurate replacement period.

[0005] An object of the present invention is to provide a diagnostic device, a diagnostic system, a diagnostic method, and a program that can provide a more accurate replacement time. Technical solutions for solving technical problems

[0006] The diagnostic device of the present invention is a diagnostic device for diagnosing an electrodeionized water manufacturing device, comprising: a measurement value acquisition unit that acquires a measurement value for each of the plurality of measurement items measured by one or more measuring devices that measure the plurality of measurement items for the electrodeionized water manufacturing apparatus; a calculation unit that calculates individual predicted lifespans based on each of the measurement values ​​acquired by the measurement value acquisition unit; a prediction unit that predicts the shortest individual predicted lifespan among the plurality of individual predicted lifespans calculated by the calculation unit as the predicted lifespan of the electrodeionized water production device; and An output unit outputs information corresponding to the predicted lifespan predicted by the prediction unit.

[0007] In addition, the diagnostic system of the present invention has: Electrodeionized water production device; One or more measuring devices for measuring a plurality of measurement items of the electrodeionized water manufacturing device; and Diagnostic devices, The diagnostic device comprises: a measurement value acquisition unit that acquires the measurement value measured by the measuring device; a calculation unit that calculates individual predicted lifespans based on the respective measurement values ​​acquired by the measurement value acquisition unit; a prediction unit that predicts the shortest individual predicted lifespan among the plurality of individual predicted lifespans calculated by the calculation unit as the predicted lifespan of the electrodeionized water production device; and An output unit outputs information corresponding to the predicted lifespan predicted by the prediction unit.

[0008] In addition, the diagnostic method of the present invention is a diagnostic method for diagnosing an electrodeionized water manufacturing device, in which the following processing is performed: A process of obtaining measurement values ​​obtained by measuring a plurality of measurement items of the electrodeionized water production device by one or more measuring devices; A process of calculating individual predicted lifespans based on the obtained respective measurement values; A process of predicting the shortest individual predicted lifespan among the calculated plurality of individual predicted lifespans as the predicted lifespan of the electrodeionized water manufacturing device; and A process of causing information corresponding to the predicted life span to be displayed on a display unit.

[0009] In addition, the program of the present invention is used to cause a computer to execute the following steps: The step of obtaining measurement values ​​obtained by measuring a plurality of measurement items of the electrodeionized water manufacturing device by one or more measuring devices; A step of calculating individual predicted lifespans based on the obtained respective measured values; The step of predicting the shortest individual predicted lifespan among the calculated plurality of individual predicted lifespans as the predicted lifespan of the electrodeionized water manufacturing device; and A step of displaying information corresponding to the predicted lifespan on a display unit. Effects of the Invention

[0010] In the present invention, a more accurate replacement time can be suggested. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a diagram showing a first embodiment of the diagnostic system of the present invention. Figure 2 Yes means Figure 1 A diagram showing an example of components included in the diagnostic device shown. Figure 3 Yes means Figure 2 FIG. 1 is a diagram showing an example of the individual predicted lifespan of each measurement item calculated by the calculation unit. Figure 4 Yes means Figure 2 The output unit shown is a diagram showing an example of a display mode in which information corresponding to the predicted life is displayed. Figure 5 Yes means Figure 2 The output unit shown is a diagram showing another example of the display mode in which information corresponding to the predicted life is displayed. Figure 6 It is used to illustrate Figure 1 A flowchart of an example of a diagnostic method for an electrodeionized water production device in the diagnostic device shown. Figure 7 It is a diagram showing a second embodiment of the diagnostic system of the present invention. Figure 8 Yes means Figure 7 A diagram showing an example of components included in the diagnostic device shown. Fig. 9 This is a graph showing an example of changes in the measured values ​​of two measurement items with respect to the operating time. Fig.10 It is used to illustrate Figure 7 A flowchart of an example of a diagnostic method for an electrodeionized water production device in the diagnostic device shown. DETAILED DESCRIPTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First Embodiment)

[0013] Figure 1 FIG. 1 is a diagram showing a first embodiment of the diagnostic system of the present invention. Figure 1 As shown, the diagnostic system in this embodiment has a diagnostic device 100, an electro-deionized water manufacturing device 200, and a measuring device 300. The diagnostic device 100 and the measuring device 300 are connected via a communication network 400 in a manner capable of communication. The communication network 400 may also be the general Internet. In addition, the communication network 400 may also be a communication network enclosed in a specific place such as an intranet of an enterprise. In addition, the diagnostic device 100 may also be directly connected to the measuring device 300.

[0014] The electrodeionized water production device 200 is a device (EDI) that produces pure water by using electric power to move ions contained in water treated by a reverse osmosis membrane or the like. The electrodeionized water production device 200 may be a device generally used in a process of producing pure water.

[0015] The measuring device 300 measures a plurality of measurement items of the electrodeionized water manufacturing device 200 at the same time. For example, as a plurality of measurement items, the measuring device 300 measures at least two of the following: the cumulative amount of power supplied to the electrodeionized water manufacturing device 200, the water flow pressure difference of the electrodeionized water manufacturing device 200, the voltage applied to the electrodes provided in the electrodeionized water manufacturing device 200, the water quality of the treated water after the water flows through the electrodeionized water manufacturing device 200, the cumulative load of the treated water flowing through the electrodeionized water manufacturing device 200, and the cumulative water flow after the water flows through the electrodeionized water manufacturing device 200. The measuring device 300 sends the measured value to the diagnostic device 100. The measuring device 300 sends the identification information that can identify the measuring device 300 together with the measurement value. It should be noted that as long as the electrodeionized water manufacturing device 200 that is the measurement object of the measuring device 300 can be identified, the identification information that can identify the electrodeionized water manufacturing device 200 that is the measurement object can also be sent together with the measurement value. In addition, the measuring device 300 assigns date information indicating the measurement date and time of the measurement value to be sent and sends it. A measuring device 300 may measure a plurality of measurement items. In addition, a plurality of measuring devices corresponding to each of the plurality of measurement items may measure each of the plurality of measurement items. It should be noted that the number of measuring devices 300 may be one or more. In the case where a plurality of measuring devices 300 are provided, each measuring device may measure all or part of the plurality of measurement items, or each measuring device may measure the measurement items assigned to each measuring device.

[0016] The diagnostic device 100 acquires the measurement value transmitted from the measuring device 300. The diagnostic device 100 diagnoses the life of the electrodeionized water-making apparatus 200 based on the acquired measurement value. Figure 2 Yes means Figure 1 FIG. 1 is a diagram showing an example of components of the diagnostic device 100. Figure 2 As shown, Figure 1 The diagnostic device 100 shown includes a measurement value acquisition unit 110, a calculation unit 120, a prediction unit 130, and an output unit 140. Figure 2 Only show Figure 1 Among the components included in the diagnostic device 100 shown, the components related to the present embodiment are main components.

[0017] The measurement value acquisition unit 110 acquires the measurement values ​​for each of the plurality of measurement items transmitted from the measurement device 300. The measurement value acquisition unit 110 may make a measurement value acquisition request to the measurement device 300 to acquire the measurement value.

[0018] The calculation unit 120 calculates the individual predicted life based on each measured value obtained by the measured value acquisition unit 110. The calculation unit 120 maintains the association between the measured value and the individual predicted life for each of the multiple measured items in advance. The calculation unit 120 can also obtain the individual predicted life associated with the measured value obtained by the measured value acquisition unit 110. In addition, the calculation unit 120 can also use the performance value of the relationship between the measured value and the life measured in the past to calculate the individual predicted life based on the measured value obtained by the measured value acquisition unit 110. There is no special provision for this calculation method. The calculation unit 120 outputs the calculated individual predicted life to the prediction unit 130. At this time, the calculation unit 120 can also output the measurement item of the calculated individual predicted life to the prediction unit 130 together with the individual predicted life.

[0019] The situation that the oxide-coated electrode gradually peels off the coating layer of the catalyst by continuously energizing it has been reported. If the catalyst layer is consumed, it is possible that the voltage rises suddenly and the electrodeionized water manufacturing device cannot operate. Therefore, the calculation unit 120 uses the accumulated amount of power as a measurement item for calculating the individual predicted life. In addition, due to the inflow of oxidants into the electrodeionized water manufacturing device 200, the inflow of foreign matter, etc., the flow of water deteriorates, and there is a situation where the water pressure difference rises. If the water pressure difference rises, it is possible to cause the quality of the treated water to decrease and the amount of the treated water to decrease. As the internal pressure increases, the risk of water leakage also increases. Therefore, the calculation unit 120 uses the water pressure difference as a measurement item for calculating the individual predicted life. In addition, the voltage applied to the electrode rises due to the damage of the ion exchanger caused by the current, the electrode plate (peeling of the catalyst layer), and the generation of scale (the water quality and operating conditions of the treated water supplied to the electrodeionized water manufacturing device 200). If the voltage applied to the electrode rises and exceeds the capacity of the DC power supply, the current value decreases and the quality of the treated water decreases. Therefore, the calculation unit 120 uses the voltage applied to the electrode as a measurement item for calculating the individual predicted life. In addition, in the electrodeionized water manufacturing device 200, due to long-term operation, components that are difficult to exchange ions may accumulate inside the electrodeionized water manufacturing device 200. As such a component, for example, polyvalent metal ions such as hardness components contained in a certain proportion in reverse osmosis (RO: Reverse Osmosis) permeate water can be cited. Most of such components have a high selectivity coefficient for ion exchange resins. The amount of accumulation of this component is taken as the cumulative accumulation amount. As an indicator for grasping the cumulative accumulation amount, the cumulative load calculated based on conductivity, flow rate, various ion concentrations, etc. can be used. If the cumulative load amount increases, the cumulative load amount may affect the reduction of the water quality of the treated water, the increase of the voltage value, the differential pressure, etc. Therefore, the calculation unit 120 uses the cumulative load amount of the treated water passed through the electrodeionized water manufacturing device 200 as a measurement item for calculating the individual predicted life.

[0020] The prediction unit 130 predicts the shortest individual predicted life as the predicted life among the plurality of individual predicted lifespans calculated by the calculation unit 120. The individual predicted lifespans compared are, of course, individual predicted lives corresponding to the measurement values ​​of the plurality of measurement items measured by the measuring device 300 at the same time.

[0021] Figure 3 Yes means Figure 2 The prediction unit 130 refers to the calculation unit 120 for calculating the individual predicted life of each measurement item. Figure 3 The results of calculating the individual predicted lifespans for the individual measurement items as shown are obtained, and the shortest individual predicted lifespan among the individual predicted lifespans is predicted as the predicted lifespan. Figure 3 In the example shown, the individual predicted life of “10 months” for the measurement item “water quality” is the shortest, and therefore the prediction unit 130 predicts “10 months” as the predicted life of the electrodeionized water-making apparatus 200 to be measured.

[0022] The prediction unit 130 may also predict the shorter of the period obtained by subtracting the period from the start of operation of the electro-deionized water manufacturing device 200 to the time point when the measuring device 300 measures a plurality of measurement items from the usable period pre-set in the electro-deionized water manufacturing device 200 (hereinafter referred to as the remaining usable period) and the above-mentioned shortest individual predicted life as the predicted life. It should be noted that the operation time (the period from the start of operation of the electro-deionized water manufacturing device 200 to the time point when the measuring device 300 measures a plurality of measurement items) can be calculated (predicted) based on the cumulative water flow after the electro-deionized water manufacturing device 200 passes water. Therefore, the prediction unit 130 may also calculate (predict) the remaining usable period based on the cumulative water flow after the electro-deionized water manufacturing device 200 passes water. The remaining usable period can be used as a numerical value indicating the degree of aging degradation of the components constituting the electro-deionized water manufacturing device 200. That is, by using the remaining usable period, the life corresponding to the aging degradation of the components constituting the electro-deionized water manufacturing device 200 can be considered. For example, plastic used as components constituting the electrodeionized water-making apparatus 200 deteriorates due to ultraviolet rays and the like as it is used, and its strength decreases.

[0023] The output unit 140 outputs information corresponding to the predicted lifespan predicted by the prediction unit 130. The output unit 140 may also output the result of comparing the predicted lifespan predicted by the prediction unit 130 with a preset threshold value. The output unit 140 may also output the predicted lifespan predicted by the prediction unit 130. In addition, the output unit 140 may also output the period (for example, year, month, and day) when the predicted lifespan will arrive based on the predicted lifespan predicted by the prediction unit 130. The output unit 140 may output the information corresponding to the predicted lifespan in the form of displaying the information, lighting a lamp corresponding to the information, printing, outputting sound, or sending the information to other devices.

[0024] Figure 4 Yes means Figure 2 The output unit 140 shown in FIG. 1 is a diagram showing an example of a display method of information corresponding to the predicted life. Figure 4 As shown, Figure 2 The output unit 140 shown may also display the level information of the degradation state corresponding to the predicted life predicted by the prediction unit 130. The level of the degradation state may be a level corresponding to the result of the comparison between the predicted life predicted by the prediction unit 130 and a plurality of thresholds by the output unit 140. For example, when the predicted life is longer than the threshold A, the output unit 140 may set the degradation state to level A, when the predicted life is less than the threshold A, and is shorter than the threshold A and longer than the threshold B, the output unit 140 may set the degradation state to level B, and when the predicted life is less than the threshold B, the output unit 140 may set the degradation state to level C.

[0025] Figure 5 Yes means Figure 2 FIG. 1 is another example of a display method in which the output unit 140 displays information corresponding to the predicted life. Figure 5 As shown, Figure 2 The output unit 140 shown may also display the predicted life itself predicted by the prediction unit 130 .

[0026] The following, Figure 1 A method for diagnosing the electrodeionized water production device 200 in the diagnostic device 100 shown will be described. Figure 6 It is used to illustrate Figure 1 1 is a flowchart of an example of a method for diagnosing the electrodeionized water-making device 200 in the diagnostic device 100. Here, a case where the output unit 140 displays the degradation information of the electrodeionized water-making device 200 as a level is described as an example.

[0027] When the operation of the electrodeionized water manufacturing device 200 is started, if the measured values ​​of the multiple measurement items measured by the measuring device 300 are sent to the diagnostic device 100 at a predetermined timing, the measured value acquisition unit 110 acquires the multiple measured values ​​sent (step S1). Next, the calculation unit 120 calculates the individual predicted life based on the individual measured values ​​acquired by the measured value acquisition unit 110 (step S2). The calculation method of the individual predicted life is as described above. Then, the prediction unit 130 predicts the shortest individual predicted life among the multiple individual predicted lifespans calculated by the calculation unit 120 as the predicted life (step S3).

[0028] The output unit 140 compares the predicted lifespan predicted by the prediction unit 130 with the threshold value, and determines the level as the degradation information of the electrodeionized water manufacturing device 200 based on the magnitude relationship between the predicted lifespan and the threshold value (step S4). The level determination method may be the above-mentioned method. Then, the output unit 140 displays the determined level information (step S5).

[0029] Thus, in this method, the measuring device 300 measures a plurality of measurement items for the electrodeionized water manufacturing device 200. In addition, the diagnostic device 100 calculates an individual predicted life based on each of the plurality of measured values. In addition, the diagnostic device 100 predicts the shortest individual predicted life among the calculated individual predicted lifespans as the predicted lifespan. Thus, a more accurate replacement period of the electrodeionized water manufacturing device 200 can be prompted. In addition, the replacement period of each electrodeionized water manufacturing device 200 in operation can be prompted. Furthermore, the supply schedule of the electrodeionized water manufacturing device 200 can be easily managed. (Second Embodiment)

[0030] Figure 7 FIG. 2 is a diagram showing a second embodiment of the diagnostic system of the present invention. Figure 7 As shown, the diagnostic system in this embodiment includes a diagnostic device 101, an electrodeionized water manufacturing device 200, and a measuring device 300. The diagnostic device 101 and the measuring device 300 are connected in a communication network 400 in a manner capable of communication. The electrodeionized water manufacturing device 200, the measuring device 300, and the communication network 400 are respectively the same as those in the first embodiment. In addition, the diagnostic device 101 can also be directly connected to the measuring device 300.

[0031] The diagnostic device 101 acquires the measurement value transmitted from the measuring device 300. The diagnostic device 101 diagnoses the life of the electrodeionized water-making apparatus 200 based on the acquired measurement value. Figure 8 Yes means Figure 7 FIG. 1 is a diagram showing an example of components of the diagnostic device 101 shown in FIG. Figure 8 As shown, Figure 7The diagnostic device 101 shown includes a measurement value acquisition unit 110, a calculation unit 121, a prediction unit 130, and an output unit 140. The measurement value acquisition unit 110, the prediction unit 130, and the output unit 140 are respectively the same as those in the first embodiment. Figure 8 Only show Figure 7 Among the components included in the diagnostic device 101 shown, the components related to the present embodiment are main components.

[0032] The calculation unit 121 calculates the individual predicted life based on each measurement value obtained by the measurement value acquisition unit 110. The calculation unit 121 calculates the individual predicted life based on the ratio of the change in time from the second measurement value measured before the first measurement value and the first measurement value of the first measurement value respectively measured recently for a plurality of measurement items. That is, the calculation unit 121 calculates the individual predicted life based on the slope relative to time from the second measurement value to the first measurement value and the first measurement value. Here, the most recent refers to a timing that is earlier in time than the timing at which the calculation unit 121 calculates the slope, and is the timing that is closest to the timing at which the calculation unit 121 calculates the slope among the timings at which the measurement value acquisition unit 110 obtains the measurement value. In addition, before refers to a timing that is earlier in time than the first measurement value used when the calculation unit 121 calculates the slope, and is the timing that is closest to the timing at which the measurement value acquisition unit 110 obtains the first measurement value among the timings at which the measurement value acquisition unit 110 obtains the measurement value. It should be noted that the time width between each timing at which two measured values ​​are measured and used when the calculation unit 121 calculates the slope of the measured value relative to the unit time during the measurement may be a time width other than the above, and is not particularly limited. For example, the calculation unit 121 may also use two measured values ​​obtained by the measured value acquisition unit 110 at different timings for each of the plurality of measured items, calculate the ratio of the change in time, and calculate the individual predicted life based on the calculated ratio of the change (the same applies to the following description). In addition, the timing may be, for example, the timing of the period from the measurement timing of the first measured value to the measurement timing of the second measured value that is preset. The relationship between the slope (the change in the measured value per unit time) and the predicted life varies depending on the measured item. Therefore, the calculation unit 121 uses the relationship between the slope measured in the past and each measured item of the life, and calculates the individual predicted life based on the measured value and its slope obtained by the measured value acquisition unit 110. The calculation unit 121 outputs the calculated individual predicted life to the prediction unit 130. At this time, the calculation unit 121 may also output the measured item for which the individual predicted life is calculated together with the individual predicted life to the prediction unit 130.

[0033] Fig. 9 FIG. 1 is a graph showing an example of changes in measured values ​​of two measurement items relative to the operating time. Fig. 9As shown in FIG. 1 , the measured value becomes the upper limit value, that is, the time point at which the electrodeionized water manufacturing device 200 is predicted to reach the end of its service life varies not only according to the measured value during the measurement, but also according to the measurement items ( Fig. 9 The life expectancy is calculated based on the measured value obtained by the measurement value acquisition unit 110 and its slope, using the relationship between the slope measured in the past and each measurement item of the life expectancy.

[0034] It should be noted that the calculation unit 121 calculates the life corresponding to the calculated value of each measurement item. The calculation unit 121 may also calculate the individual predicted life based on the calculated life and the ratio (slope) of the change of the life over time. Specifically, the calculation unit 121 calculates the individual predicted life (first life) corresponding to the first measurement value measured most recently for each measurement item. The calculation unit 121 calculates the individual predicted life (second life) corresponding to the second measurement value measured before the first measurement value. The calculation unit 121 calculates the ratio (slope) of the change from the second life to the first life relative to the time from the measurement date and time of the second measurement value to the first measurement date and time. The calculation unit 121 calculates the individual predicted life based on the calculated slope and the first life. The method for calculating the individual predicted life based on each measurement value may be the method used in the first embodiment.

[0035] The following, Figure 7 A method for diagnosing the electrodeionized water production apparatus 200 in the diagnostic apparatus 101 shown will be described. Fig.10 It is used to illustrate Figure 7 1 is a flowchart of an example of a method for diagnosing the electrodeionized water-making device 200 in the diagnostic device 101 shown in FIG. Here, a case where the output unit 140 displays the degradation information of the electrodeionized water-making device 200 as a level is described as an example.

[0036] When the operation of the electrodeionized water manufacturing device 200 is started, if the measurement values ​​for multiple measurement items measured by the measuring device 300 are sent to the diagnostic device 101 at a specified timing, the measurement value acquisition unit 110 acquires the multiple measurement values ​​sent (step S11). Next, the calculation unit 121 calculates the ratio of the change in the time from the first measurement value recently acquired by the measurement value acquisition unit 110 to the second measurement value acquired by the measurement value acquisition unit 110 before the first measurement value, that is, calculates the slope of the measurement value relative to the unit time during the measurement (step S12). Then, the calculation unit 121 calculates the individual predicted life for the measurement item based on the measurement value and the slope (step S13). Therefore, the prediction unit 130 predicts the shortest individual predicted life among the multiple individual predicted lifespans calculated by the calculation unit 121 as the predicted life (step S14).

[0037] The output unit 140 compares the predicted lifespan predicted by the prediction unit 130 with the threshold value, and determines the level as the degradation information of the electrodeionized water manufacturing device 200 based on the magnitude relationship between the predicted lifespan and the threshold value (step S15). The level determination method may be the above-mentioned method. Then, the output unit 140 displays the determined level information (step S16).

[0038] Thus, in this method, for the electrodeionized water manufacturing device 200, the measuring device 300 measures a plurality of measurement items. In addition, the diagnostic device 101 calculates the individual predicted life based on each of the plurality of measured values. In addition, the diagnostic device 101 predicts the shortest individual predicted life among the calculated individual predicted lifespans as the predicted lifespan. When the calculation unit 121 calculates the individual predicted lifespan, the individual predicted lifespan is calculated using the ratio (slope) of the change in the measured value relative to the unit time. Thus, a more accurate replacement period of the electrodeionized water manufacturing device 200 can be prompted. In addition, the replacement period of each electrodeionized water manufacturing device 200 in operation can be prompted. Furthermore, the supply schedule of the electrodeionized water manufacturing device 200 can be easily managed.

[0039] Although the above description has been made that each component is responsible for each function (process), this distribution is not limited to the above method. In addition, regarding the structure of the component, the above method is only an example and is not limited to this. In addition, each embodiment can also be combined.

[0040] The processing performed by the diagnostic apparatuses 100 and 101 may be performed by logic circuits made according to the purpose. In addition, a computer program (hereinafter referred to as a program) in which the processing content is described as steps may be recorded in a recording medium that can be read by the diagnostic apparatuses 100 and 101, respectively, so that the diagnostic apparatuses 100 and 101 read and execute the program recorded in the recording medium. The recording medium that can be read by the diagnostic apparatuses 100 and 101 refers to a removable recording medium such as a magneto-optical disk, a DVD (Digital Versatile Disc), a CD (Compact Disc), a Blu-ray (registered trademark) Disc, and a USB (Universal Serial Bus) memory. In addition, it also refers to a memory such as a ROM (Read Only Memory) and a RAM (Random Access Memory) built into the diagnostic apparatuses 100 and 101, an HDD (Hard Disc Drive), an SSD (Solid State Drive), etc. The program recorded in the recording medium is read by a CPU provided in the diagnostic apparatuses 100 and 101, respectively, and the same processing as described above is performed under the control of the CPU. Here, the CPU operates as a computer that executes a program read from a recording medium recording the program.

[0041] Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the structure and details of the present invention within the scope of the present invention.

[0042] This application claims the benefit of priority based on Japanese patent application No. 2022-071416, filed on April 25, 2022, the disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A diagnostic device for diagnosing an electrodeionized water production device, the diagnostic device comprising: a measurement value acquisition unit that acquires a measurement value for each of a plurality of measurement items measured by one or more measurement devices, the measurement devices measuring the plurality of measurement items for the electrodeionized water manufacturing apparatus; a calculation unit that calculates individual predicted lifespans based on each of the measurement values ​​acquired by the measurement value acquisition unit; a prediction unit that predicts the shortest individual predicted lifespan among the plurality of individual predicted lifespans calculated by the calculation unit as the predicted lifespan of the electrodeionized water production device; and An output unit outputs information corresponding to the predicted lifespan predicted by the prediction unit.

2. The diagnostic device according to claim 1, wherein: The calculation unit calculates the individual predicted lifespan based on a ratio of a change in the measurement values ​​of the plurality of measurement items with respect to time.

3. The diagnostic device according to claim 1 or 2, wherein: The prediction unit predicts the predicted life as the shorter of a period obtained by subtracting a period from the start of operation of the electrodeionized water-making apparatus to the time point when the measuring device measures the plurality of measurement items from the usable period of the electrodeionized water-making apparatus and the shortest individual predicted life.

4. The diagnostic device according to claim 1 or 2, wherein: The measurement value acquisition unit acquires measurement values ​​obtained by the measuring device measuring at least two of the following measurement items as the multiple measurement items: the cumulative amount of power supplied to the electrodeionized water manufacturing device, the water flow pressure difference of the electrodeionized water manufacturing device, the voltage applied to the electrodes arranged in the electrodeionized water manufacturing device, the water quality of the treated water after the water flows through the electrodeionized water manufacturing device, the cumulative load of the treated water flowing through the electrodeionized water manufacturing device, and the cumulative water flow after the water flows through the electrodeionized water manufacturing device.

5. The diagnostic device according to claim 1 or 2, wherein: The output unit outputs a result of comparing the predicted lifespan with a threshold value.

6. A diagnostic system comprising: Electrodeionized water production device; One or more measuring devices for measuring a plurality of measurement items of the electrodeionized water production device; and Diagnostic devices, The diagnostic device comprises: a measurement value acquisition unit that acquires the measurement value measured by the measuring device; a calculation unit that calculates individual predicted lifespans based on the respective measurement values ​​acquired by the measurement value acquisition unit; a prediction unit that predicts the shortest individual predicted lifespan among the plurality of individual predicted lifespans calculated by the calculation unit as the predicted lifespan of the electrodeionized water production device; and An output unit outputs information corresponding to the predicted lifespan predicted by the prediction unit.

7. A diagnostic method is a diagnostic method for diagnosing an electrodeionized water manufacturing device, in which the following processing is performed: A process of obtaining measurement values ​​obtained by measuring a plurality of measurement items of the electrodeionized water production device by one or more measuring devices; A process of calculating individual predicted lifespans based on the obtained respective measurement values; A process of predicting the shortest individual predicted lifespan among the plurality of calculated individual predicted lifespans as the predicted lifespan of the electrodeionized water manufacturing device; and A process of causing information corresponding to the predicted life span to be displayed on a display unit.

8. A program for causing a computer to execute the following steps: The step of obtaining measurement values ​​obtained by measuring a plurality of measurement items of the electrodeionized water manufacturing device by one or more measuring devices; The step of calculating individual predicted lifespans based on the obtained respective measured values; The step of predicting the shortest individual predicted lifespan among the plurality of calculated individual predicted lifespans as the predicted lifespan of the electrodeionized water producing device; and A step of displaying information corresponding to the predicted life on a display unit.

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