CN113218037B - Ice water main machine maintenance estimation system and method - Google Patents

Abstract

The invention provides an ice water host maintenance estimation system and a method thereof. The ice water host maintenance estimation includes a database, an input module, a data processing module, a health value calculation module and a maintenance value calculation module. The database stores operational data for multiple hosts. The input module is used for inputting a start date and a specified host data of a specified ice water host. The data processing module filters and processes a plurality of selected operation data according to the start date and the specified host data. The health value calculation module is used for receiving the selected operation data, and calculating a health value of the designated ice water host accordingly. The maintenance value calculation module receives and averages the health values in a specific interval to calculate a maintenance value, so as to assist in judging whether the specified ice water host needs to be maintained.

Description

Ice water host maintenance prediction system and method

technical field

The present invention relates to a system and a method, in particular to an ice water host maintenance prediction system and method.

Background technique

The ice water host is an existing technology widely used in air-conditioning, and at least a compressor, a condenser, an expansion valve and an evaporator are arranged on a refrigerant circulation path. Generally speaking, the evaporator is used to generate ice water for subsequent generation of cold air, and the condenser is where the waste heat is generated.

The ice water host in the prior art is generally maintained on a regular basis, for example, it may be maintained every quarter or half a year. However, the method of regular maintenance may cause various problems arising from inaccurate maintenance timing such as premature maintenance or late maintenance of the ice water host. In order to more accurately judge the maintenance timing of the ice water main unit, it is necessary to add other sensors to sense various parameters of the ice water main unit to make judgments, which may easily lead to problems such as cost increase but not necessarily economic benefits. Therefore, in the prior art, there is room for improvement in judging the maintenance timing of the ice water host.

SUMMARY OF THE INVENTION

In view of the fact that in the prior art, regular maintenance may cause inaccurate maintenance timing of the ice water main unit, and accurate judgment of the maintenance timing of the ice water main unit may cause problems such as cost increase. A main purpose of the present invention is to provide a maintenance prediction system for an ice water main engine to solve at least one problem in the prior art.

In order to solve the problem of the prior art, the necessary technical means adopted by the present invention is to provide an ice water host maintenance and estimation system, which is used for communication and connection to a plurality of ice water hosts, and each ice water host has a host data, and A plurality of host operating data are generated after running for an operating time on each working day, and the ice water host maintenance estimation system includes a database, an input module, a data processing module, a health value calculation module and a maintenance value calculation module.

The database stores a plurality of the above-mentioned host data and host operation data corresponding to the ice water host. The input module is used for inputting a start date and a specified host data of a specified ice water host. The data processing module communicates with the input module and the database for filtering and processing a plurality of selected operation data corresponding to the work date corresponding to the start date to the work date corresponding to a current date in the host operation data according to the designated host data. The health value calculation module communicates with the data processing module for receiving the selected operation data, and calculates a health value for each working day of the designated ice water host accordingly. The maintenance value calculation module communicates with the health value calculation module, and averages all the above-mentioned health values in a set interval to calculate a maintenance value, so as to calculate the maintenance value of each working day.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the ice water host maintenance estimation system, and further includes a warning module, and the warning module communicates with the maintenance value calculation module for receiving the maintenance value. , and when the maintenance value is greater than a maintenance threshold value, a maintenance warning message is generated.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is the warning module in the ice water host maintenance estimation system, which includes a difference calculation unit, a judgment unit and a warning unit. The difference calculation unit receives the maintenance value and calculates a difference between the maintenance value and the maintenance threshold value. The judging unit is communicatively connected to the difference calculation unit for receiving the difference, and when judging that the difference is between 0 and a difference threshold, a first judgment signal is generated; and when judging that the difference is greater than the difference threshold When , a second judgment signal is generated. The warning unit is communicatively connected to the judging unit, and is used for generating a minor warning message in the maintenance warning information when receiving the first judging signal, and generating a serious warning message in the maintenance warning information when receiving the second judging signal.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is the data processing module in the ice water host maintenance estimation system, which includes a format conversion unit and a data selection unit. The format conversion unit performs format conversion on the host operation data. The data selection unit filters the operation data of the host. Among them, the host operation data is formatted and filtered to form the selected operation data.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the ice water temperature data with an ice water temperature value for each selected operation data in the ice water host maintenance prediction system, when the specified ice water temperature When the water main unit is in a normal state, the operation time includes a normal oscillation time and a steady state time, and the selected operation data includes multiple oscillation operation data at the normal oscillation time and multiple steady state operation data at the steady state time; when specifying When the ice water host is in an abnormal state, the operation time includes an abnormal oscillation time, the selected operation data includes a plurality of abnormal operation data at the abnormal oscillation time, and the health value calculation module includes an overshoot value calculation unit and a convergence time ratio calculation unit. unit, an error average calculation unit and a health value calculation unit. After the overshoot value calculation unit receives the oscillating operation data under normal conditions, it is used to calculate a temperature difference value of each ice water temperature value minus a temperature set value, and take the absolute value of the smallest of all the temperature difference values. Defined as an overshoot value; after receiving the abnormal operation data in an abnormal state, it is used to calculate the temperature difference value of each ice water temperature value minus the temperature set value, and the maximum temperature difference value after the Mth is calculated. which is defined as the overshoot value, where M is greater than or equal to 2. The convergence time ratio calculation unit calculates a convergence time ratio by dividing the normal oscillation time by the running time in a normal state, and calculates a convergence time ratio by dividing the abnormal oscillation time by the running time in an abnormal state. After receiving the steady-state operation data in the normal state, the error average calculation unit is used to calculate the temperature difference value of each ice water temperature value in the steady-state operation data minus the temperature set value, and take all the above-mentioned temperature difference values as After the absolute value is averaged, an error average is calculated; after receiving the abnormal operation data of the Mth and the Mth after the abnormal state, it is used to calculate the temperature of each ice water temperature value minus the temperature set value Take the absolute value of all the above temperature differences and average them to calculate the average error value. The health value calculation unit communicates with the overshoot value calculation unit, the convergence time ratio calculation unit and the error average calculation unit, and is used for calculating the health value by using the overshoot value, the convergence time ratio value and the error average value. Among them, when the designated ice water host is in a normal state, at least one of the temperature differences after the Nth pen is less than 1; when the designated ice water host is in an abnormal state, all the temperature differences after the Nth pen are greater than 1, and N is greater than 2.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the health value calculation unit in the ice water host maintenance estimation system multiply the overshoot value by a first weight value, and calculate the convergence time The ratio value is multiplied by a second weight value and the error mean value is multiplied by a third weight value and summed to calculate the health value.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the ice water host maintenance estimation system, and further includes an interval setting module, and the interval setting module communicates with the maintenance value calculation module for The interval is operatively set.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the ice water host maintenance estimation system, and further includes a display module, and the display module is connected to the maintenance value calculation module in communication, for receiving and displaying the starting value. All maintenance values from the start date to the current date.

In order to solve the problems of the prior art, the necessary technical means adopted by the present invention is to provide a method for estimating the maintenance of an ice water main engine, which is implemented by using the above-mentioned maintenance estimation system for an ice water main engine, and includes: (a) using The database stores the host data and the host operation data; (b) use the input module to input the starting date and the designated host data of the designated ice water host; (c) use the data processing module to filter and process the selected operation data; (d) ) Use the health value calculation module to receive the selected operation data, and calculate the health value of the designated ice water host on each working day; (e) Use the maintenance value calculation module to average all the health values in the set interval to calculate The maintenance value is calculated to calculate the maintenance value of the designated ice water main unit on each working day.

Continuing from the above, the ice water host maintenance estimation system and method provided by the present invention utilizes a database, an input module, a data processing module, a health value calculation module and a maintenance value calculation module to calculate the health value and the maintenance value of the specified ice water host. Maintenance value, and use the maintenance value to judge the maintenance timing of the designated ice water host. According to practical data, compared with the regular maintenance in the prior art, the present invention determines the maintenance timing more accurately, and does not require additional sensors and parameters, and only needs to use the main engine operation data generated by the ice water main engine after the operation. Calculations and estimates can be made.

Description of drawings

1 is a block diagram showing an ice water host maintenance prediction system provided by a preferred embodiment of the present invention;

2 is a flow chart showing a method for estimating the maintenance of an ice water host provided by a preferred embodiment of the present invention;

FIG. 3 is a schematic diagram showing the selected operation data obtained by the screening process of the present invention;

FIG. 4 is a schematic diagram showing the calculated health value and maintenance value of the present invention; and

FIG. 5 is another schematic diagram showing the maintenance value calculated by the present invention.

Explanation of reference numerals

1 Ice water host maintenance prediction system

11 Database

12 Input module

13 Data processing module

131 Format Conversion Unit

132 Data selection unit

14 Health value calculation module

141 Overshoot value calculation unit

142 Convergence time ratio calculation unit

143 Error average calculation unit

144 Health value calculation unit

15 Maintenance value calculation module

16 Alert Module

161 Difference calculation unit

162 Judgment unit

163 Warning unit

17 Display module

18 Section setting module

DTH difference threshold

D1, D2, D3,

D4, D5, D6,

D7, D8, D9 working date

EB error band

H1, H2, H3, H4 temperature difference

T run time

T1 normal oscillation time

T2 steady state time

Te1, Te2 ice water temperature value

TeS temperature setpoint

TLU temperature upper limit

TLD temperature lower limit

t0, t1, t2, t3,

t4, t5, t6, t7

VTH service threshold

Detailed ways

The specific embodiments of the present invention will be described in more detail below with reference to the schematic diagrams. The advantages and features of the present invention will become apparent from the following description and claims. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

Please refer to FIG. 1 to FIG. 2, wherein, FIG. 1 is a block diagram showing an ice water host maintenance prediction system provided by a preferred embodiment of the present invention; Flow chart of water host maintenance estimation method. As shown in the figure, an ice water host maintenance estimation system 1 and a method thereof are used to communicate and connect a plurality of ice water hosts, and include a database 11, an input module 12, a data processing module 13, and a health value calculation module 14. A maintenance value calculation module 15 , a warning module 16 , a display module 17 and an interval setting module 18 .

Each ice water host has a host data, and generates a plurality of host operating data after running for an operating time on each working day. For example, the ice water host may have been running for 8 hours on December 16 and generated multiple host operation data, and the ice water host may have been running for 8 hours on December 17 and generated multiple host operating data. The operating data of the main engine usually contains many kinds of values, among which, at least the value of ice water temperature is included. The amount of host operating data depends on the frequency of each host operating data generation. More accurate, one host operating data may be generated every minute, or it may be every two minutes, or even every five minutes. The host data may be a MAC address (Media Access Control Address), a model, and the like. The ice water temperature value can be the ice water temperature value at the ice water outlet or the ice water temperature value at the ice water inlet. The working date refers to the date when the ice water host is in operation.

The database 11 stores the host data of all the ice water hosts and the operation data of all the hosts corresponding to all the ice water hosts, that is, step S101. The input module 12 is used for inputting a start date and a specified host data of a specified ice water host, that is, step S102. The designated ice water host usually refers to one of the above ice water hosts that a user wants to observe or estimate.

The data processing module 13 communicates with the database 11 and the input module 12 , ie, step S103 , and includes a format conversion unit 131 and a data selection unit 132 . The format conversion unit 131 performs format conversion on the host operation data. The data selection unit 132 filters the mainframe operation data, wherein all mainframe operation data whose working date is between the start date and a current date will be defined as the above-mentioned selected operation data after format conversion and screening. The sequence of format conversion and screening does not affect the implementation of the present invention. For example, the designated ice water main unit was set up on January 1 and started to operate until December 31, and the days when the designated ice water main unit was in operation from January 1 to December 31 are all working days. When the user inputs June 1 (start date) on December 31st (current date), the data processing module 13 will match the period from January 1st to December 31st with June 1st (start date) The mainframe operation data for the working date up to December 31 (the current date) is filtered out.

The health value calculation module 14 communicates with the data processing module 13 to receive the selected operation data, and calculates a health value of the designated ice water host on each working day according to the selected operation data, that is, step S104 . In this embodiment, the health value calculation module 14 includes an overshoot value calculation unit 141 , a convergence time ratio calculation unit 142 , an error average calculation unit 143 and a health value calculation unit 144 . The maintenance value calculation module 15 communicates with the health value calculation module 14, and averages all the health values in a set interval to calculate a maintenance value, that is, step S105. Therefore, the maintenance value calculation module 15 will calculate the maintenance value of each working date. For example, if the set interval is 7 days, the maintenance value on May 7 is the average of the health value from May 1 to May 7. The setting interval is set by the user according to the ice water host, and can also be 10 days, 15 days, and 30 days. In other words, the present invention calculates estimated values (health value and maintenance value) by using selected operation data.

The warning module 16 is in communication with the maintenance value calculation module 15 for receiving the maintenance value and generating a maintenance warning message when the maintenance value is greater than a maintenance threshold value. In the present embodiment, the warning module 16 includes a difference calculation unit 161 , a determination unit 162 and a warning unit 163 . In addition, the warning module 16 can also generate a safety message when the maintenance value is less than the maintenance threshold value.

The display module 17 communicates with the maintenance value calculation module 15 and the warning module 16 for displaying all maintenance values. In this embodiment, the display module 17 can further display maintenance warning information and safety information. The interval setting module 18 is connected to the maintenance value calculation module 15 in communication, and is used for operatively setting the above-mentioned setting interval. In practice, the interval setting module 18 is for the user to operate to set the above-mentioned setting interval.

Next, please refer to FIG. 1 to FIG. 5 together, wherein, FIG. 3 is a schematic diagram showing the selected operation data obtained by the screening process of the present invention; FIG. 4 is a schematic diagram showing the health value and maintenance value calculated by the present invention; 5 is another schematic diagram showing the maintenance value calculated by the present invention. As shown in the figure, when the designated ice water host is in a normal state, the running time T includes a normal oscillation time T1 and a steady state time T2. The selected operation data includes a plurality of oscillation operation data within the normal oscillation time T1 and a plurality of steady state operation data within the steady state time T2. When the designated ice water host is in an abnormal state, the operation time T includes an abnormal oscillation time, and the selected operation data includes a plurality of abnormal operation data at the abnormal oscillation time. In a normal state, at least one of the temperature differences after the Nth stroke is less than 1; in an abnormal state, all the temperature differences after the Nth stroke are greater than 1, where N is greater than 2. N may be a number greater than 2, such as 20, 30, etc., which corresponds to the specified time (for example, one hour of operation) after the specified ice water main engine runs. According to whether the temperature difference after the Nth pen is less than 1, it is judged whether the designated ice water host is in a normal state or an abnormal state.

In a normal state, the overshoot value calculation unit 141 receives the oscillation operation data, and calculates the temperature difference between the ice water temperature value of each oscillation operation data minus a temperature set value TeS, and calculates the minimum temperature difference value. The absolute value is defined as an overshoot value. In this embodiment, the temperature difference H1 formed by the ice water temperature value Te1 corresponding to the time point t1 and the temperature setting value TeS is the smallest. The temperature difference H2 formed by the ice water temperature value Te2 corresponding to the time point t2 and the temperature setting value TeS will be greater than the temperature difference H1, so the absolute value of the temperature difference H1 is defined as the overshoot value. Since the temperature difference may be positive or negative, in an abnormal state, the overshoot value calculation unit 141 will receive the abnormal operation data, and define the maximum value of the Mth and subsequent temperature differences as the overshoot value.

After the time point t3 in the normal state, most of the selected operation data will enter an error band EB formed by an upper temperature limit value TLU and a lower temperature limit value TLD. Practically speaking, the temperature upper limit value TLU is one more than the temperature set value TeS, and the temperature lower limit value TLD is one less than the temperature set value TeS. Therefore, the time point t0 to t3 will be defined as the normal oscillation time T1, and after the time point t3 will be defined as the steady state time T2. The convergence time ratio calculation unit 142 divides the normal oscillation time T1 by the operation time T to calculate a convergence time ratio value. In an abnormal state, the convergence time ratio calculation unit 142 divides the abnormal oscillation time by the operation time T to calculate the convergence time ratio value. In practice, most of the convergence time ratio values in abnormal state are 1. The error average calculation unit 143 receives the steady-state operation data in a normal state, and calculates the temperature difference between each ice water temperature value in the steady-state operation data and the temperature set value TeS, for example, generated at time points t4 and t5 The temperature difference H3, H4. Next, the error average calculation unit 143 takes the absolute values of all the temperature differences and averages them, so as to calculate an error average value. In the abnormal state, the error average calculation unit 143 will receive the M-th and M-th subsequent abnormal operation data to calculate the temperature difference value of each ice water temperature value minus the temperature set value TeS, and calculate all the above The absolute value of the temperature difference is averaged to calculate the average value of the error. Wherein, M is greater than or equal to 2, and can be 2, 21, 31 or other numbers greater than or equal to 2. In addition, M can also be equal to N.

The health value calculation unit 144 is communicatively connected to the overshoot value calculation unit 141 , the convergence time ratio calculation unit 142 and the error average calculation unit 143 to receive the overshoot value, the convergence time ratio value and the error average value, and calculate the health value accordingly . In this embodiment, the health value calculation unit 144 multiplies the overshoot value by a first weight value, the convergence time ratio value by a second weight value, and the error average value by a third weight value, The above results are added to calculate the health value. The purpose of taking the absolute value of the temperature difference for the above-mentioned overshoot value and the average error value is to avoid that when the temperature difference value is a negative number, it will cancel each other out with the positive number in the calculation, thereby reducing the health value and calculating it from the health value. The reference value of the maintenance value.

In practice, the selected operating data is at the later stage of the steady state time T2, that is, when the ice water host stops running, and the selected operating data may be lower than the temperature lower limit TLD and deviate from the error band EB, such as time points t6 to t7. between. The health value calculation module 14 may also delete the selected operation data corresponding to the time points t6 to t7 without calculating.

The maintenance value calculation module 15 will calculate the maintenance value according to the health value calculated above. Figure 5 shows the maintenance values of working days D1 to D9, and Figure 4 shows the health and maintenance values of working days D6 to D9. In order to clarify the drawing, the health value is not shown in FIG. 5 , but the maintenance value of FIG. 5 is generated in the same manner as the maintenance value of FIG. 4 . For example, when the set interval is set to 15 days, the maintenance value of work date D9 is the average of all health values between work date D8 and work date D9; the maintenance value of work date D3 is work date D1 to work date D3 The average of all health values in between. If the set interval is set to 11 days, the maintenance value of the working date D3 is the average of all the health values between the working date D2 and the working date D3. The drawings presented in different setting intervals may be slightly different. For the present embodiment, the setting interval in FIG. 5 is 15 days.

It can be clearly found from the attached drawings that the health value of each working day oscillates greatly. Therefore, if the health value is used as a judging factor for maintenance timing, the reference value is limited. The maintenance value is the average of the health values in the set interval. When the maintenance value continues to rise, it means that the health value in the set interval may remain at a high number or keep rising. Therefore, if the maintenance value is used as a judging factor for maintenance timing, its reference value will be higher.

When the maintenance value exceeds a maintenance threshold value VTH, the warning module 16 generates maintenance warning information. In more detail, the difference calculation unit 161 receives the maintenance value, and subtracts the maintenance threshold VTH from the maintenance value to obtain a difference. The judging unit 162 is connected to the difference value calculating unit 161 for receiving the difference value, and when judging that the difference value is between 0 and a difference threshold value DTH, a first judgment signal is generated; and when judging that the difference value is greater than the difference value When the threshold value DTH is valued, a second judgment signal is generated. The warning unit 163 communicates with the judging unit 162 for generating a minor warning in the maintenance warning information when receiving the first judging signal, and generating a serious warning in the maintenance warning information when receiving the second judging signal information.

In practice, minor warning information and serious warning information can be distinguished by color (yellow light signal, red light signal), sound, text, flashing frequency, etc., so as to provide maintenance warning information to users. Whether it is a minor warning message or a serious warning message, it reminds the user that the ice water host needs to be maintained. A safety message informs the user that no maintenance is currently required, such as a green light.

Referring to the figure, the difference between the maintenance value of the working date D4 and the maintenance threshold value VTH exceeds the difference threshold value DTH, so a serious warning message will be generated at this time. The difference between the maintenance value of the working date D7 and the maintenance threshold value VTH is between 0 and the difference threshold value DTH, so a slight warning message will be generated. When the maintenance value is lower than the maintenance threshold value VTH, the warning module 16 may not act or may generate safety information, such as working dates D1 , D2 , D3 , D5 , D8 and D9 .

It should be noted that between the working days D4 and D5, the ice water host is designated for maintenance. It can be clearly found from the attached drawing that the maintenance value of the working date D4 is the maintenance value of the working date D5. On the working date D7, the designated ice water host is also maintained. It can also be clearly found from the attached drawing that between the working dates D5 and D6, the maintenance value does not exceed the maintenance threshold value VTH.

To sum up, the ice water host maintenance estimation system provided by the present invention can use the ice water temperature value to infer the health value and the maintenance value, and use the maintenance value to estimate the maintenance timing of the ice water host. Compared with the regular maintenance in the prior art, the present invention can more accurately judge the maintenance timing, and can also check whether the existing maintenance is effective. In addition, the present invention only uses the ice water temperature that must be recorded by the ice water host for judgment, and does not need to add additional sensors to sense additional parameters, so the price is also cheaper than the prior art.

Through the detailed description of the preferred embodiments above, it is hoped that the features and spirit of the present invention can be described more clearly, rather than limiting the scope of the present invention by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the present claims.

Claims (8)

1. An ice water host maintenance and estimation system, used to communicate with a plurality of ice water hosts, each of the plurality of ice water hosts has host data, and generates a plurality of Main engine operation data, and the ice water main engine maintenance prediction system includes: a database, corresponding to the plurality of ice water hosts and storing a plurality of the above-mentioned host data and the plurality of host operation data; The input module is used to input the starting date and the specified host data of the specified ice water host; A data processing module, which communicates with the input module and the database, and is used for filtering and processing the working date corresponding to the starting date from the operating data of the plurality of hosts according to the specified host data to the corresponding a plurality of selected operation data corresponding to the working date of the current date; a health value calculation module, connected to the data processing module in communication, for receiving the plurality of selected operation data, and calculating the health value of each working day of the designated ice water host accordingly; and a maintenance value calculation module, which communicates with the health value calculation module, and averages all the above-mentioned health values in the set interval to calculate the maintenance value, so as to calculate the maintenance value of each working day; Wherein, each of the plurality of selected operation data has ice water temperature data with an ice water temperature value, and when the designated ice water host is in a normal state, the operation time includes a normal oscillation time and a steady state time, and the plurality of Each selected operation data includes a plurality of oscillation operation data at the normal oscillation time and a plurality of steady state operation data at the steady state time; when the designated ice water host is in an abnormal state, the operation time includes an abnormality Oscillation time, the plurality of selected operation data includes a plurality of abnormal operation data at the abnormal oscillation time, and the health value calculation module includes: The overshoot value calculation unit is used to calculate the temperature difference value of each ice water temperature value minus the temperature set value after receiving the plurality of oscillation operation data in the normal state, and calculate the temperature difference value among all the temperature difference values. The absolute value of the smallest one is defined as the overshoot value; after receiving the plurality of abnormal operation data in the abnormal state, it is used to calculate the temperature difference value of each ice water temperature value minus the temperature set value , and the maximum value of the temperature difference values after the Mth is defined as the overshoot value, where M is greater than or equal to 2; A convergence time ratio calculation unit, which divides the normal oscillation time by the operation time in the normal state to calculate a convergence time ratio value; and divides the abnormal oscillation time by the operation time in the abnormal state , calculate the convergence time ratio value; The error average calculation unit is used to calculate the temperature value of each ice water in the plurality of steady-state operation data minus the temperature setting value after receiving the plurality of steady-state operation data in the normal state the temperature difference value, and taking the absolute value of all the above-mentioned temperature difference values and averaging them, so as to calculate the error average value; in the abnormal state, receiving the M-th and the M-th subsequent abnormal operations After the data, it is used to calculate the temperature difference value of each ice water temperature value minus the temperature set value, and take the absolute value of all the above temperature difference values and average them, so as to calculate the error average value ;as well as a health value calculation unit, communicating with the overshoot value calculation unit, the convergence time ratio calculation unit and the error average calculation unit, for using the overshoot value, the convergence time ratio value and the error average value to calculate the health value; Wherein, when the designated ice water host is in the normal state, at least one of the temperature differences after the Nth pen is less than 1; when the designated ice water host is in the abnormal state, all the temperature differences after the Nth pen are less than 1 The temperature difference is greater than 1, and N is greater than 2. 2. The ice water host maintenance estimation system according to claim 1, further comprising a warning module, the warning module communicates with the maintenance value calculation module to receive the maintenance value, and when the maintenance value is greater than When the maintenance threshold value is reached, a maintenance warning message is generated. 3. The ice water host maintenance estimation system according to claim 2, wherein the warning module comprises: a difference calculation unit, receiving the maintenance value, and calculating the difference between the maintenance value and the maintenance threshold value; a judging unit, connected to the difference calculating unit in communication, for receiving the difference, and generating a first judgment signal when judging that the difference is between 0 and a difference threshold; and when judging that the difference is between 0 and a difference threshold When the difference is greater than the difference threshold, generating a second judgment signal; and The warning unit is connected to the judging unit in communication, and is used for generating slight warning information in the maintenance warning information when receiving the first judging signal, and generating the said second judging signal when receiving the second judging signal Serious warning message in the maintenance warning message. 4. The ice water host maintenance estimation system according to claim 1, wherein the data processing module comprises: a format conversion unit that performs format conversion on the plurality of host operation data; and a data selection unit, for screening the operating data of the plurality of hosts; The plurality of selected operation data are formed after format conversion and screening of the plurality of host operation data. 5. The ice water host maintenance estimation system according to claim 1, wherein the health value calculation unit is to multiply the overshoot value by a first weight value, and multiply the convergence time ratio value by a second value. weight value and multiplying the error mean by a third weight value and summing them up to calculate the health value. 6. The ice water host maintenance estimation system according to claim 1, further comprising an interval setting module, and the interval setting module is communicated with the maintenance value calculation module to be operable to set the setting. set interval. 7. The ice water host maintenance estimation system according to claim 1, further comprising a display module, and the display module communicates with the maintenance value calculation module to receive and display the start date to the current All maintenance values for the date. 8. A method for estimating the maintenance of an ice water main engine, implemented using the ice water main engine maintenance estimation system as claimed in claim 1, and comprising: (a) using the database to store the plurality of mainframe data and the plurality of mainframe operation data; (b) using the input module, inputting the start date and the specified host data of the specified ice water host; (c) using the data processing module to filter and process the plurality of selected operation data; (d) using the health value calculation module to receive the plurality of selected operation data, and calculate the health value of the designated ice water host on each working day; and (e) Using the maintenance value calculation module to calculate the maintenance value by averaging all the health values in the set interval, so as to calculate the maintenance of the designated ice water host on each working day value.

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