WO2022054570A1 - Operating state analysis device of compressor - Google Patents

Abstract

[Problem] To provide an operating state analysis device of a compressor, which can be applied to various compressors and has higher analysis accuracy. [Solution] An operating state analysis device 1 of a compressor includes: an analysis device communication means 8 that acquires, from a total of four compressors from a first compressor C1 to a fourth compressor C4, a plurality of current values that are values related to power consumption and a plurality of pressure values that are values related to pressure; and an analysis device control means 9 (threshold value setting means) that sets, from a plurality of power consumptions calculated from the plurality of current values and the plurality of pressure values, a threshold value TH related to the power consumption for each of the first compressor C1 to the fourth compressor C4. In the threshold value TH, when the power consumption is equal to or higher than the threshold value TH, it is considered that a current state is in a rated operation, and when the power consumption is lower than the threshold value TH, it is considered that the current state is not in the rated operation.

Description

Compressor operating condition analyzer

The present invention relates to an operating state analysis device for a compressor, which is a device for analyzing the operating state of a compressor (compressor).

Japanese Patent No. 5887217 (Patent Document 1) discloses a system for managing an operating state of a compressor.
In this system, as described in claim 1 and [0077], when the ratio of no-load operation is equal to or more than a predetermined value as the operating tendency of the compressor in a predetermined period, the unload operation is performed. A set value (unload pressure value) that makes the ratio smaller than the predetermined value is determined and transmitted to the user's computer corresponding to the compressor via the network.
As described in [0078], the ratio of the unload operation is grasped from the information indicating which of the load operation and the unload operation obtained from the compressor is executed as the operation information.
Alternatively, as described in [0080], the load factor of the compressor as a percentage of the unload operation can be calculated based on the current value supplied to the compressor in a predetermined period.

Japanese Patent No. 5887217

Among the above systems, in the system in which the ratio of the unload operation is grasped from the information indicating which of the load operation and the unload operation is executed, the compressor executes the load operation execution information and the unload operation. It must output information, and its applicability is narrow.
Further, among the above systems, in the system in which the load factor is calculated from the current value, the specific calculation method of the load factor is unknown, and the load factor is grasped only based on the current value of the compressor. There is room for improvement in the accuracy of grasping the operating state of the compressor.

Therefore, one of the main objects of the present invention is to provide a compressor operation state analyzer capable of supporting various compressors.
Further, another one of the main objects of the present invention is to provide a compressor operating state analysis device having higher analysis accuracy.

In order to achieve the above object, the invention according to claim 1 is a data acquisition means for acquiring a plurality of power-related values which are values related to power consumption and pressure-related values which are values related to pressure from one or more compressors. And a threshold setting means for setting a threshold value for the power consumption for each compressor from the plurality of the power-related values and the plurality of pressure-related values, and the threshold value is If the power consumption is equal to or higher than this threshold value, it is considered to be in rated operation, and if the power consumption is less than this threshold value, it is considered to be not in rated operation. be.
The invention according to claim 2 further provides, in the above invention, a model discriminating means for discriminating the model of the compressor from the plurality of the power-related values and the plurality of pressure-related values, and the threshold value. The setting means is characterized in that the threshold value is set according to the model determined by the model determining means.
According to the third aspect of the present invention, in the above invention, if the duration of the unrated operation analyzed by the threshold value is longer than a predetermined time, the duration is calculated to be within a specific time. It is characterized in that a new control data output means for outputting the operation control data of the new compressor is provided.
The invention according to claim 4 is a data acquisition means for acquiring a plurality of power-related values which are values related to power consumption and pressure-related values which are values related to pressure from one or more compressors, and a plurality of the power-related values. It is characterized by having a model discriminating means for discriminating the model of the compressor from the plurality of pressure-related values.
According to the fifth aspect of the present invention, in the above invention, the data acquisition means acquires the power-related value and the pressure-related value in each predetermined cycle, and the predetermined cycle is 30 seconds or less. It is characterized by.
The invention according to claim 6 is characterized in that, in the above invention, the electric power-related value is a current value supplied to the compressor.
The invention according to claim 7 is characterized in that, in the above invention, the data acquisition means acquires the power-related value and the pressure-related value by communication.
The invention according to claim 8 further includes, in the above invention, a lower limit value acquisition means for acquiring the lower limit value of the pressure value, which is the lowest value of the pressure value among the plurality of pressure-related values, for each compressor. It is characterized by being.

One of the main effects of the present invention is to provide a compressor operation state analyzer capable of supporting various compressors.
Further, another one of the main effects of the present invention is to provide a compressor operating state analysis device having even higher analysis accuracy.

It is a block diagram of the analysis system including the operation state analysis device (analysis device) of the compressor which concerns on this invention, and the peripheral structure thereof. It is a flowchart which concerns on the operation example of the analyzer of this invention. It is a power pressure graph of the 1st compressor (load / unload controller) in the operation example. It is a pressure fluctuation graph of the 1st compressor in the operation example. It is a power pressure graph in the modification 1. It is a power pressure graph in the second modification. It is a power pressure graph in the modification example 3. It is a power pressure graph in the modification 4. It is a power pressure graph in the modification 5. It is a power pressure graph of the 3rd compressor (throttle valve controller) in the operation example. It is a power pressure graph of the 4th compressor (inverter machine) in the operation example.

Hereinafter, embodiments of the present invention and examples of modifications thereof will be described as appropriate with reference to the drawings.
The present invention is not limited to the following forms and modifications.

[Configuration, etc.]
FIG. 1 is a block diagram of a compressor operation state analysis system (analysis system DS) including the compressor operation state analysis device (analysis device 1) according to the present invention and its peripheral configuration.
The analysis system DS includes an analysis device 1 and a data collection gateway G installed in the factory F.

The analyzer 1 analyzes the operating state of the first compressor C1, the second compressor C2, the third compressor C3, and the fourth compressor C4 installed in the factory F.
The first compressor C1 to the fourth compressor C4 are positive displacement type screw type compressors. At least one of the first compressor C1 to the fourth compressor C4 may be a speed type (turbo type), or may be a positive displacement type, a reciprocating type, or a scroll type.
The first compressor C1 to the third compressor C3 are refueling type constant speed machines. Of these, in the first compressor C1 and the second compressor C2, load / unload control is performed. The load / unload control is a control for switching from load operation to no-load operation when a load (pressure) equal to or higher than a predetermined value is reached, as in Patent Document 1 described above. That is, the model of the first compressor C1 and the second compressor C2 is a load / unload controller. On the other hand, in the third compressor C3, throttle valve control is performed. That is, the model of the third compressor C3 is a throttle valve controller. In the throttle valve control, the suction air amount is increased / decreased (adjusted) according to the load by the throttle valve to control the air pressure. At least one of the first compressor C1 and the second compressor C2 may be an oil-free type or may be another compressor. Further, the third compressor C3 may be a combination of load / unload control and throttle valve control, or may be another compressor.
The model of the fourth compressor C4 is a refueling type inverter machine. That is, the fourth compressor C4 controls the rotation speed of the compression unit (motor) based on the inverter to adjust the load. The fourth compressor C4 may be an oil-free inverter machine or another compressor.
The first compressor C1 is connected to the first current sensor A1. The first current sensor A1 detects the current applied to the first compressor C1. The first current sensor A1 is connected to the data acquisition gateway G. The first current sensor A1 may be incorporated in the first compressor C1 or may be externally attached.
Similarly, the second compressor C2 is connected to the second current sensor A2. The third compressor C3 is connected to the third current sensor A3. The fourth compressor C4 is connected to the fourth current sensor A4. The second current sensor A2 to the fourth current sensor A4 are connected to the data acquisition gateway G.
The first compressor C1 to the fourth compressor C4 generate compressed air (dotted arrow in FIG. 1), and send the compressed air to the receiver tank R installed in the factory F.

The receiver tank R stores the compressed air and distributes the compressed air to a place in the factory F where the compressed air is required.
A pressure sensor PG is connected to the receiver tank R. The pressure sensor PG detects the pressure of the compressed air in the receiver tank R. The pressure sensor PG is connected to the data acquisition gateway G.
The number of various devices in the factory F may be increased or decreased in various ways. For example, the number of compressors may be 3 or less or 5 or more, and the inverter may not be installed or a plurality of compressors may be installed. However, the constant speed machine may not be installed or may be installed by other than three units, and the receiver tank may not be installed or may be installed by a plurality of units. Further, the pressure sensor PG may be connected to at least one compressor.

The analyzer 1 includes an analyzer display means 2, an analyzer input means 4, an analyzer storage means 6, an analyzer communication means 8 as a data acquisition means, and an analyzer control means 9 as a control means. I have.
The analyzer 1 is formed, for example, by a portable computer. The analyzer 1 may be formed by executing a program on a server computer (cloud) connected to the Internet IN (analyzer 1 as a cloud service). In this case, the server computer may be provided with functions other than the analysis function of the analyzer 1.
The analyzer 1 is under the control of an organization that maintains the first compressor C1 to the fourth compressor C4. The analyzer 1 may be managed by another organization such as a manufacturer of the first compressor C1 to the fourth compressor C4 or an organization that manages the factory F.

The analyzer display means 2 is a means capable of displaying various types of information.
The analyzer display means 2 is, for example, at least one of a flat display such as a liquid crystal display and a printer.

The analyzer input means 4 is a means capable of inputting various types of information.
The analyzer input means 4 is, for example, at least one of a keyboard, a pointing device, a button and a switch.
The analyzer display means 2 and the analyzer input means 4 may be formed by a display with a touch sensor, that is, a touch panel.

The analyzer storage means 6 is a means capable of storing various types of information.
The analyzer storage means 6 is, for example, at least one of a hard disk, a memory, and an optical disk.
The analyzer storage means 6 includes an analyzer program DP, a first current value group AA1 to a fourth current value group AA4, a pressure value group PGV, a power pressure graph CPG, a threshold value TH, a lower limit value PL of the pressure value, and a pressure. The fluctuation graph PCG, the individual performance graph IPG, and the discharge amount group DAA are stored.

The analyzer communication means 8 is a means capable of communicating various types of information.
The analyzer communication means 8 is, for example, at least one of an interface and a modem.

The analyzer control means 9 is a means for controlling various means related to the analyzer 1.
The analyzer control means 9 is, for example, a CPU.
The analyzer control means 9 controls various means by executing the analyzer program DP with reference to the analyzer storage means 6.

A data acquisition gateway G is communicably connected to the analyzer communication means 8 via the Internet IN. The data acquisition gateway G may be connected to the analyzer communication means 8 by a dedicated line or the like.
The data acquisition gateway G acquires and accumulates various data measured for the first compressor C1 to the fourth compressor C4.
The data acquisition gateway G includes a gateway display means 12, a gateway input means 14, a gateway storage means 16, a gateway premises communication means 17, a gateway communication means 18, and a gateway control means 19.
The data acquisition gateway G is formed by, for example, a portable computer.
The data collection gateway G is under the control of the organization related to the analyzer 1. The data collection gateway G may be managed by another organization as in the analyzer 1.

The gateway display means 12 is similar to the analyzer display means 2.
The gateway input means 14 is the same as the analyzer input means 4.

The gateway storage means 16 is the same as the analyzer storage means 6 except that the contents of the stored information are partially different.
The gateway storage means 16 has the current values of the first current value group AA1 which is a set of the current values of the first compressor C1 indicated by the signal of the first current sensor A1 and the current value of the second compressor C2 indicated by the signals of the second current sensor A2. The second current value group AA2 which is a set, the third current value group AA3 which is a set of the current values of the third compressor C3 indicated by the signal of the third current sensor A3, and the fourth compressor indicated by the signal of the fourth current sensor A4. The fourth current value group AA4, which is a set of current values of C4, is stored. Since these current values can calculate power consumption as described later, they are values related to power consumption (power-related values). The power-related value may be the power consumption itself, or may be another value for which the power consumption can be calculated (for example, a combination of a current value and a voltage value).
Further, the gateway storage means 16 stores a pressure value group PGV which is a set of pressure values of the receiver tank R indicated by the signal of the pressure sensor PG. The pressure value is a value indicating the pressure itself, and is a value related to pressure (pressure-related value). The pressure-related value may be another value from which the pressure can be calculated.
Further, the gateway storage means 16 stores the gateway program GP.

The gateway premises communication means 17 communicates with the first current sensor A1 to the fourth current sensor A4 and the pressure sensor PG.
The gateway premises communication means 17 may only receive signals from the first current sensor A1 to the fourth current sensor A4 and the pressure sensor PG, and may not transmit the signals.

The gateway communication means 18 is the same as the analyzer communication means 8, and communicates with other devices and the like via the Internet IN.
The gateway premises communication means 17 and the gateway communication means 18 may be integrated.

The gateway control means 19 is a means for controlling various means related to the data acquisition gateway G.
The gateway control means 19 is, for example, a CPU.
The gateway control means 19 controls various means by executing the gateway program GP with reference to the gateway storage means 16.
The gateway control means 19 stores each current value received from the first current sensor A1 in the gateway premises communication means 17 in the gateway storage means 16 as a component of the first current value group AA1 every 1 second (predetermined cycle). Let me. Similarly, each current value related to the second current sensor A2 to the fourth current sensor A4 and each pressure value related to the pressure sensor PG are set to the second current value group AA2 to the fourth current every 1 second (predetermined cycle). It is stored in the gateway storage means 16 as a component of the value group AA4 or a component of the pressure value group PGV.
The acquisition interval (cycle) of the current value, etc. of the first current value group AA1 is every 2 seconds, every 3 seconds, every 5 seconds, every 10 seconds, every 15 seconds, every 20 seconds, every 30 seconds, etc. There may be. Further, the first current sensor A1 or the like may always transmit a signal indicating a current value, may intermittently transmit the signal every second, or every 0.5 seconds or the like. The signal may be transmitted intermittently.

Further, the management terminal M related to the management of the factory is connected to the Internet IN.
The management terminal M includes a management terminal display means 22, a management terminal input means 24, a management terminal storage means 26, a management terminal premises communication means 27, a management terminal communication means 28, and a management terminal control means 29. ing.
The management terminal M is provided in the factory F and is formed by, for example, a portable computer.
The management terminal M is under the control of the organization related to the factory F. The management terminal M may be managed by another organization.

The management terminal display means 22 is the same as the gateway display means 12.
The management terminal input means 24 is the same as the gateway input means 14.

The management terminal storage means 26 is the same as the gateway storage means 16 except that the contents of the stored information are partially different.
The management terminal storage means 26 stores a management terminal program MP, a power pressure graph CPG, a threshold value TH, a lower limit value PL of a pressure value, and a pressure fluctuation graph PCG.

The management terminal premises communication means 27 is the same as the gateway premises communication means 17, and communicates with the first current sensor A1 to the fourth current sensor A4 and the pressure sensor PG. The communication between the management terminal premises communication means 27 and the first current sensors A1 to the fourth current sensors A4 and the pressure sensor PG is not shown.
The management terminal communication means 28 is the same as the gateway communication means 18, and communicates with other devices and the like via the Internet IN.

The management terminal control means 29 is a means for controlling various means related to the management terminal M.
The management terminal control means 29 is, for example, a CPU.
The management terminal control means 29 controls various means by executing the management terminal program MP with reference to the management terminal storage means 26.
The management terminal M may be provided outside the factory F. Further, the management terminal M has a modification example similar to that of the data acquisition gateway G as appropriate.

[Operation example, etc.]
Hereinafter, an operation example of the analyzer 1 will be described.
FIG. 2 is a flowchart relating to an operation example of the analyzer 1.
A worker belonging to an organization that manages the analyzer 1 and the data collection gateway G first brings the data collection gateway G to the factory F, and first connects the first current sensors A1 to the fourth to the corresponding terminals of the gateway premises communication means 17. By connecting the lead wires from the current sensor A4 and the pressure sensor PG, the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV as data related to the first compressor C1 to the fourth compressor C4 are connected. Start collecting. Collection of the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV is performed over a predetermined period (step S1). The predetermined period is, for example, 12 hours according to the daily operating time of the factory F, or one week according to the operating time of one cycle of the factory F.
The worker usually only needs to handle the data collection gateway G at the start and after the collection.
The predetermined period may be other than 12 hours. Further, the worker may belong to an organization other than the above-mentioned organization, or may be independent.

Next, the operator carries the data acquisition gateway G to the installation location of the analyzer 1 and connects it to the analyzer 1, and collects the collected first current value group AA1 to fourth current value group AA4 and the pressure value group PGV. It is stored in the analyzer storage means 6. That is, the analyzer 1 acquires the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV collected by the data acquisition gateway G (step S2). The analyzer 1 stores the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV with an identifier (factory ID) related to the factory F in order to distinguish them from other factories and the like.
The analyzer 1 may acquire the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV from the data acquisition gateway G by communication via the Internet IN. Alternatively, various sensors may be directly connected to the Internet IN, and the analyzer 1 may acquire the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV from the sensor via the Internet IN. Here, when the analyzer 1 is formed on the cloud, the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV are directly uploaded to the cloud.

Subsequently, the operator instructs the analyzer 1 to start the analysis process of the operation of the first compressor C1 to the fourth compressor C4 by the analyzer input means 4 (step S3).
The analyzer 1 starts the analysis process based on this command.
The analyzer 1 may start the analysis process regardless of the command when the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV are acquired (step S2).

Then, the analyzer control means 9 refers to the first current value group AA1 and the pressure value group PGV, and performs an analysis process of the operating state of the first compressor C1 (steps S4, n = 1).
In this analysis process, the analyzer control means 9 converts each current value of the first current value group AA1 into power consumption (step S4-1). Here, the conversion is performed using the conversion formula of "power consumption = current value x rated voltage x √3 x power factor". The rated voltage and power factor are stored in the analyzer storage means 6 in a state where the values related to the first compressor C1 are input in advance and associated with the first current value group AA1. As the rated voltage and power factor, initial values (general values), calculated values, or the like may be used. Further, other conversion formulas may be used in the calculation of power consumption. Further, a power consumption sensor related to the first compressor C1 may be provided, and the power consumption directly obtained from the power consumption sensor may be stored in the data acquisition gateway G.
Next, as shown in FIG. 3, the analyzer control means 9 sets the set of the power consumption and the pressure value converted from the current values at the same time (the time closest to each other) existing every second. A power pressure graph CPG is formed by plotting on a plane about the power consumption (vertical axis) and the pressure value (horizontal axis) (step S4-2). The power pressure graph CPG shows the relationship between the power consumption and the pressure value. The power pressure graph CPG is stored in the analyzer storage means 6 in a state associated with an identifier (compressor ID) indicating the first compressor C1. The analyzer control means 9 converts the current value at a certain time into power consumption, refers to the pressure value at the same time, plots the set of the power consumption and the pressure value at that time, and plots the set of the power consumption and the pressure value at that time, and the current at the next time. The value may be converted into power consumption and processed in the same manner below. That is, steps S4-1 and S4-2 may be performed collectively. Further, the vertical axis and the horizontal axis in the power pressure graph CPG may be interchanged from those described above. Further, the analyzer control means 9 may display the power pressure graph CPG on the analyzer display means 2. In addition, the power pressure graph CPG may be stored as a database. At least one of the exchange of the vertical axis and the horizontal axis, the display in the analyzer display means 2, and the storage as a database may be appropriately performed in another graph.

Subsequently, the analyzer control means 9 estimates the model (control type) of the first compressor C1 from the shape of the power pressure graph CPG (step S4-3, model discrimination means).
Since the shape of the power pressure graph CPG of the first compressor C1 includes a quadrilateral having a width on each side, it can be inferred that the first compressor C1 is a load / unload controller.
More specifically, a large number of plots near the rated power consumption (corresponding to road operation) that correspond to the wide upper side of the quadrilateral, and a large number of plots that correspond to the wide lower side of the quadrilateral and are less than the rated power consumption (Ann). (Equivalent to road operation), a large number of plots with almost constant pressure values (corresponding to switching from load operation to unload operation), which corresponds to the wide right side of the quadrilateral, and the wide left side of the quadrilateral. When at least one of the features of a large number of plots (corresponding to switching from unloading operation to loading operation), in which the pressure value is almost constant, is present, the analyzer control means 9 loads / unloads the model. I guess. In particular, the left and right sides of the quadrilateral correspond to switching of operation, and if the plot interval is longer than about a minute, there is a high possibility that the left and right sides will not be plotted. Since the pressure value is acquired, the left and right sides are fully visible. Therefore, the model discrimination accuracy in the analyzer control means 9 is sufficient.
When the model of the first compressor C1 is known, the model may be input in advance by the analyzer input means 4. In this case or the like, the model determination (step S4-3) may be omitted.

Further, the analyzer control means 9 sets the threshold value TH related to the rated operation (load operation) from the power pressure graph CPG based on the model of the first compressor C1 being load / unload control (step). S4-4, threshold setting means). This threshold value TH is related to power consumption, and is considered to be in rated operation when the power consumption is equal to or higher than the threshold value TH, and is not in rated operation when the power consumption is less than the threshold value TH. It is considered to be.
The analyzer control means 9 sets this threshold TH as shown by a horizontal dotted line in FIG. That is, the analyzer control means 9 assumes a horizontal line passing through the lower end of the wide upper side of the quadrilateral in the power pressure graph CPG, and sets the power consumption indicated by the horizontal line as the threshold value TH related to the rated operation. ..
The threshold value TH is stored in the analyzer storage means 6 in a state associated with the compressor ID.

By setting the threshold value TH in this way, the plot (pressure value) having the power consumption equal to or higher than the threshold value TH is processed as being related to the rated operation. Therefore, the rated power consumption (catalog) of the first compressor C1. Compared to the case where the value (value, specification value) is input and processed, the processing can be performed more realistically. That is, when the specification value of the first compressor C1 is input, all plots having power consumption equal to or higher than the specification value are processed as specification values, so that the power consumption is processed to be less than the actual value. In the analyzer 1 for setting the value TH, the plot having the power consumption equal to or higher than the threshold value TH is processed by the measured power consumption value as the rated operation, so that the plot is processed at the power consumption very close to the actual power consumption. Can be done. Therefore, when making an improvement proposal such as operation control of the first compressor C1 from the processing at the time of inputting the specification value, the improvement effect is excessive because the power consumption before the improvement is underestimated. Since the power consumption before the improvement is evaluated according to the actual situation, the improvement effect is also practical. In order to avoid underestimation of power consumption with a margin, the analyzer control means 9 maximizes a part or all of plots having a threshold value of TH or more in all plots regardless of the power consumption value of the plot. The power consumption (measured maximum power) of is regarded as the power consumption value of the plot and may be processed.
Then, as the processing here, for example, grasping the unloading time (time of unloading operation) can be mentioned. For example, the analyzer control means 9 grasps the time during which plots below the threshold value TH are continuous as one unload time, and integrates each unload time as appropriate.
Further, the analyzer control means 9 may convert each plot into a discharge amount and grasp the discharge amount group DAA which is a set thereof. The analyzer control means 9 converts the plot of the threshold value TH or more by the discharge amount in the rated operation, and the plot of less than the threshold value TH is the discharge amount converted from the individual performance graph IPG related to the first compressor C1. .. The individual performance graph IPG is a graph showing the relationship between the power consumption and the discharge amount in the non-rated operation, and is individual for each model such as the first compressor C1 to the fourth compressor C4. The individual performance graph IPG may be stored in the analyzer storage means 6 in advance, or may be input in accordance with the completion of acceptance of the first current value group AA1 or the like. The analyzer control means 9 is most suitable (closest) from a plurality of individual performance graph IPGs stored in advance in the analyzer storage means 6 based on at least one of the compressor ID and the shape of the power pressure graph CPG. ) You may extract the thing and use it for conversion.
If each plot is converted into a discharge amount to form a discharge amount group DAA, a unified and easy-to-understand standard of the discharge amount will be used in the first compressor C1 to the fourth compressor C4, and the first in the factory F. Accurate analysis of the compressors C1 to the fourth compressor C4 can be easily performed.
Processing such as grasping the unload time and generating the discharge amount group DAA may be performed together with the setting of the threshold value TH (step S4-4).

Further, the analyzer control means 9 grasps the lower limit value PL of the pressure value (steps S4-5, lower limit value acquisition means).
In the power pressure graph CPG (FIG. 3), the plot PLW corresponds to the lower limit PL of the pressure value. By obtaining the pressure value every second by the data acquisition gateway G, the lower limit value PL that is extremely close to the true lower limit value is grasped as compared with the case where the pressure value is obtained in units of minutes or more.
By grasping the lower limit PL of the pressure value accurately, it is possible to accurately analyze the event of the pressure drop.
Further, as shown in FIG. 4, the analyzer control means 9 can form a pressure fluctuation graph PCG having a pressure value on the vertical axis and time on the horizontal axis in the same manner as the power pressure graph CPG. Pressure Fluctuation Graph No current value or power consumption is used in the formation of the PCG. Since the pressure fluctuation graph PCG is formed using the pressure value every second, it is possible to accurately analyze the event of the pressure fluctuation.

Here, some examples of modification of the data collection gateway G will be described. In these modification examples, the acquisition interval (cycle) of the current value and the pressure value is changed. Each modification example whose cycle is 2, 5, 10, 30, 60 seconds is referred to as modification example 1 to modification example 5 in the following order.
5 to 9 are power pressure graph CPGs according to the modified examples 1 to 5 in order. As the period becomes longer, the quadrilateral of the power pressure graph CPG becomes thinner as a whole, and in particular, the number of plots on the left and right sides decreases. Further, the number of plots of the pressure value from the left side of the quadrilateral also decreases as the period becomes longer. In particular, in the modified example 5 (cycle 60 seconds), the lower limit PL of the pressure value (corresponding to the plot PLW5) is about 0.58 MPa, and the lower limit PL of the pressure value (plot PLW1) is compared with the other modified examples. ~ PLW4) is far from the true lower limit. Therefore, from the viewpoint of accuracy, the period is preferably less than about a minute, and preferably as short as possible. However, the shorter the cycle, the larger the number of data, and the higher the cost for management and calculation. Therefore, from the viewpoint of the balance between accuracy and cost reduction, the acquisition cycle of the current value and the pressure value is preferably 1 second or more and 30 seconds or less.

Returning to the description of the analyzer 1 from the description of the modified example, the analyzer control means 9 refers to the second current value group AA2 and the pressure value group PGV after performing these processes on the first compressor C1, and the first 2 The analysis process of the operating state of the compressor C2 is performed in the same manner (step S4, n = 2).
Since the second compressor C2 is a load / unload controller like the first compressor C1, the analysis process of the operating state of the second compressor C2 is performed in the same manner as the analysis process of the operating state of the first compressor C1. ..

Next, the analyzer control means 9 performs an analysis process of the operating state of the third compressor C3 (steps S4, n = 3).
Also in this analysis process, each current value of the third current value group AA3 is converted into power consumption (step S4-1).

Further, the analyzer control means 9 forms a power pressure graph CPG (step S4-2).
As shown in FIG. 10, the power pressure graph CPG of the third compressor C3 has a mountain-shaped shape having a “^” shape. The region (referred to as region A) on the left side (low pressure side) from the pressure value (about 0.48 MPa, see the vertical dotted line) at the top of the chevron shape corresponds to the region below the throttle valve control pressure. The throttle valve control pressure is the maximum pressure value at which the throttle valve does not operate (the opening of the throttle valve is the maximum in the settable range), and the region A is a region where the suction amount by the throttle valve is not reduced. .. On the other hand, the region on the right side (high pressure side) from the pressure value at the top of the chevron shape (referred to as the B region) corresponds to the region exceeding the throttle valve control pressure. This B region is a region where the suction amount by the throttle valve is reduced.
Since the analyzer control means 9 has a chevron shape, the third compressor C3 is analyzed as a throttle valve controller (step S4-3, model discrimination means).

Then, the analyzer control means 9 processes the data (plot) belonging to the region A in the same manner as the load / unload controller as follows. That is, the analyzer control means 9 sets the minimum value of the pressure value in the chevron shape in the A region as the threshold value TH related to the rated operation (see step S4-4, threshold value setting means, horizontal dotted line). ). Further, the analyzer control means 9 processes the plot relating to the power consumption equal to or higher than the threshold value TH as the rated operation. Further, the analyzer control means 9 processes the plot relating to the power consumption less than the threshold value as unrated operation, for example, obtaining the discharge amount group DAA from the individual performance graph IPG of the third compressor C3. By setting such a threshold value TH, more realistic and accurate data processing becomes possible.
Further, the analyzer control means 9 obtains the discharge amount group DAA from the individual performance graph IPG of the third compressor C3, for example, for the data (plot) belonging to the B region, as in the case of the unrated operation in the A region. Perform processing. By dividing the A area and the B area, more realistic and accurate data processing becomes possible.

Further, the analyzer control means 9 grasps the lower limit value PL of the pressure value (steps S4-5, lower limit value acquisition means).
In the power pressure graph CPG (FIG. 10), the plot PLWC3 corresponds to the lower limit PL of the pressure value. By obtaining the pressure value every second by the data acquisition gateway G, the lower limit value PL that is extremely close to the true lower limit value is grasped as compared with the case where the pressure value is obtained in units of minutes or more.
By grasping the lower limit PL of the pressure value accurately, it is possible to accurately analyze the event of the pressure drop.
Further, the analyzer control means 9 can accurately generate the pressure fluctuation graph PCG for the third compressor C3 by the pressure value every second, as in the case of the first compressor C1.
In the processing of the third compressor C3, there are appropriately modified examples similar to the processing of the first compressor C1.

Subsequently, the analyzer control means 9 analyzes the operating state of the fourth compressor C4 (steps S4, n = 4).
Also in this analysis process, each current value of the fourth current value group AA4 is converted into power consumption (step S4-1).

Further, the analyzer control means 9 forms a power pressure graph CPG (step S4-2).
As shown in FIG. 11, the power pressure graph CPG of the fourth compressor C4 has an almond shape (rugby ball shape, elliptical shape whose long axis is downward downward). Further, in this power pressure graph CPG, a horizontal linear portion extends from the upper left of the almond shape to the left (left horizontal linear portion), and a horizontal linear portion extends from the lower right of the almond shape to the right (right horizontal linear portion). part).
Since the analyzer control means 9 has an almond shape, or further has at least one of a left horizontal linear portion and a right horizontal linear portion, the fourth compressor C4 is analyzed as an inverter machine (steps S4-3, model). Discrimination means).

Then, the analyzer control means 9 sets the minimum value of the pressure value in the left horizontal linear portion as the threshold value TH related to the rated operation (step S4-4, threshold value setting means, see the horizontal dotted line in FIG. 11). ). The analyzer control means 9 may set the pressure value or the like at the upper end portion of the almond shape as the threshold value TH related to the rated operation.
Further, the analyzer control means 9 processes the plot relating to the power consumption equal to or higher than the threshold value TH as the rated operation in the same manner as in the above case. Further, the analyzer control means 9 processes the plot relating to the power consumption below the threshold value as unrated operation as in the above case. By setting such a threshold value TH, more realistic and accurate data processing becomes possible.

Further, the analyzer control means 9 grasps the lower limit value PL of the pressure value (steps S4-5, lower limit value acquisition means).
In the power pressure graph CPG (FIG. 11), the plot PLWC4 corresponds to the lower limit PL of the pressure value. By obtaining the pressure value every second by the data acquisition gateway G, the lower limit value PL that is extremely close to the true lower limit value is grasped as compared with the case where the pressure value is obtained in units of minutes or more.
By grasping the lower limit PL of the pressure value accurately, it is possible to accurately analyze the event of the pressure drop.
Further, the analyzer control means 9 can accurately generate the pressure fluctuation graph PCG for the fourth compressor C4 by the pressure value every second, as in the case of the first compressor C1.
In the processing of the fourth compressor C4, there are appropriately modified examples similar to the processing of the first compressor C1 and the processing of the third compressor C3.

The operator analyzes the operation of the first compressor C1 to the fourth compressor C4 by the above processing, and makes use of it for analysis for improvement proposal and the like.
As improvement proposals, for example, changing the setting of the unload pressure value for the purpose of shortening the unloading time in the load / unload controller, reviewing the operation start pressure of the throttle valve in the throttle valve controller, and others in the inverter machine. Confirmation of whether or not the machine is being operated ahead of the constant speed machine, etc.
To elaborate on an operation example of changing the setting of the unload pressure value among these, the analyzer control means 9 has a threshold set in the first compressor C1 to the fourth compressor C4 to be analyzed. When the unload time (duration of non-rated operation) grasped from the value is a predetermined time (for example, 1 hour) or more, the duration is calculated to be within a specific time (45 minutes). -Calculate and output new operation control data of at least any one of the fourth compressor C4 (new control data output means). For example, when the unloading time of the first compressor C1 is longer than a predetermined time, the analyzer control means 9 has a specific cycle (for example, 1 minute) over a specific period (for example, one week) of the first compressor C1 to the fourth compressor C4. Each operation command value for each is calculated and output as new operation control data. The specific time related to the unload time may be a predetermined time or less, and may be the same as the predetermined time. Further, the specific period related to the new operation control data may be the same as or different from the predetermined period related to the collection period of the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV. Is also good. Further, the specific cycle related to the new operation control data may be the same as or different from the predetermined cycle related to the acquisition interval of the current value or the like of the first current value group AA1. In addition, for example, when the unload time of the first compressor C1 is longer than a predetermined time, new operation control data may be generated only for the first compressor C1, and new operation may be generated only for other than the first compressor C1. Control data may be generated, or new operation control data may be generated only for a part of the first compressor C1 to the fourth compressor C4. That is, the target for generating new operation control data when the unload time becomes a predetermined time or longer is not limited to all of the first compressor C1 to the fourth compressor C4. Further, when the unload time becomes a predetermined time or more, whether or not new operation control data is generated may be determined according to the model of the first compressor C1 to the fourth compressor C4.
Further, at least one of the above processing and analysis of improvement proposals may be performed on the cloud. At least one of setting the threshold value, outputting new operation control data, determining the model, and acquiring the lower limit value may be performed by another device. Further, the setting of the threshold value, the output of new operation control data, the determination of the model, the acquisition of the lower limit value, and the processing other than these may be performed in different devices.
The worker can visit the factory F or the installation location of the management terminal M and present the analysis results and the like to the managers and the like of the first compressor C1 to the fourth compressor C4.

Further, the worker can transmit the analysis result or the like to the management terminal M belonging to the person in charge of management or the like via the Internet IN (step S5).
In this case, the analyzer control means 9 controls the analyzer communication means 8 to the management terminal M of the factory F corresponding to the factory ID, each power pressure graph CPG and pressure of the first compressor C1 to the fourth compressor C4. The fluctuation graph PCG, the lower limit PL of the pressure value, and the discharge amount group DAA are transmitted. The data to be transmitted may be a part of these, or may have other elements such as the threshold value TH added. Further, the data related to the improvement proposal may be transmitted. Further, when the analysis device 1 is formed on the cloud, the administrator on the management terminal M side can access the cloud and download the analysis result or the like via the Internet IN.

When the management terminal control means 29 receives these data (processing results) in the management terminal communication means 28, the management terminal control means 29 stores them in the management terminal storage means 26 (step S6).
Further, the management terminal control means 29 refers to the memory and arranges a display format such as converting these data as they are or into a graph of another format, or at least the first compressor C1 to the fourth compressor C4. Calculations such as addition are performed on any two of them, and the management terminal display means 22 displays the data (step S7).
The above-mentioned calculation such as addition may be performed by the analyzer 1 and may be acquired via the Internet IN. Further, when other data is transmitted as in the above-mentioned modification example, the other data may be similarly stored (step S6) and displayed (step S7). Further, the management terminal storage means 26 may not store the data, and the management terminal control means 29 may display the received data as it is. Here, when the analyzer 1 is formed on the cloud, the management terminal control means 29 will display the data on the cloud.

[Action effect, etc.]
In the above analyzer 1, the current values (first current value group AA1 to fourth current value group AA4), which are values related to power consumption, and values related to pressure are used from a total of four first compressors C1 to fourth compressors C4. Consume from the analyzer communication means 8 that acquires a plurality of certain pressure values (pressure value group PGV), a plurality of power consumptions calculated from a plurality of current values, and a plurality of pressure values (relationship between power consumption and pressure). It has an analyzer control means 9 (threshold setting means, step S4-4) for setting a threshold value TH for electric power for each of the first compressor C1 to the fourth compressor C4, and has a threshold value TH. Is considered to be in rated operation when the power consumption is equal to or higher than this threshold value TH, and is considered not to be in rated operation when the power consumption is less than this threshold value TH.
Therefore, in the analyzer 1, the pressure value and the like can be processed according to the actual situation, and the accuracy of the analysis is further improved. As described above, the threshold value TH is a screw type refueling type load / unload controller (first compressor C1, second compressor C2), throttle valve controller (third compressor C3), and inverter machine (1st compressor C3). It can be set in the fourth compressor C4) or the like, and the analyzer 1 can correspond to various compressors.

Further, the analyzer control means 9 (model discrimination means, step S4-3) for discriminating the model of the first compressor C1 to the fourth compressor C4 from the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV. ) Is provided, and the analyzer control means 9 (threshold value setting means) sets the threshold value TH according to the model determined by the analyzer control means 9 (model determination means). Therefore, the threshold value is set more appropriately, and the analysis for realizing more appropriate operation control of the first compressor C1 to the fourth compressor C4 is performed more accurately.
Furthermore, the analyzer control means 9 (new) that outputs new operation control data such that when the unload time analyzed by the threshold value TH is equal to or longer than a predetermined time, the unload time is calculated to be within a specific time. Control data output means) is provided. Therefore, specific new control data for improving the operation control is output. Therefore, the operator can easily propose the improvement of the operation control by referring to the output new control data. Further, the new control data can be immediately set for the first compressor C1 to the fourth compressor C4, and the operation control is immediately and easily improved.

In addition, the analyzer 1 has a total of four first compressors C1 to fourth compressors C4, and has a current value (first current value group AA1 to fourth current value group AA4) and a value related to pressure, which are values related to power consumption. First compressors C1 to 4 from the analyzer communication means 8 for acquiring a plurality of pressure values (pressure value group PGV), the first current value group AA1 to the fourth current value group AA4, and the pressure value group PGV. It has an analyzer control means 9 (model discriminating means, step S4-3) for discriminating the model of the compressor C4.
Therefore, the analyzer 1 can automatically discriminate the model of the first compressor C1 to the fourth compressor C4 from the relationship between the power consumption and the pressure, and can process the data according to the discriminated model. The operator can easily obtain the discriminated model and the improved operation control analyzed according to the model. In addition, it is possible to prevent an operator from making a judgment error and an input error of the model, and to prevent the occurrence of erroneous processing and analysis.

Further, the analyzer communication means 8 acquires a current value and a pressure value for each predetermined cycle, and the predetermined cycle is set to 30 seconds or less. Therefore, the accuracy of the analysis becomes even better.
Further, each power-related value is each current value supplied to the first compressor C1 to the fourth compressor C4. Therefore, power consumption can be easily obtained at low cost.
In addition, the analyzer communication means 8 acquires the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV by communication. Therefore, the first current value group AA1 to the fourth current value group AA4 and the pressure value group PGV for operation analysis can be easily obtained at low cost.
Further, the analyzer control means 9 (lower limit value acquisition means, step S4-5) sets the lower limit value PL of the pressure value, which is the lowest value of the pressure value in the pressure value group PGV, to the first compressor C1 to the fourth compressor C4. Get it every time. Therefore, the operator can grasp the pressure drop related to the operation abnormality of the first compressor C1 to the fourth compressor C4 and the like, and utilize it for improving the operation of the first compressor C1 to the fourth compressor C4 and the like.

[Change examples, etc.]
The form of the present invention is not limited to the above-mentioned form and modified examples, and further modified examples as shown below are appropriately included.
In the above embodiment, where the first compressor C1 to the fourth compressor C4 are installed in the factory F, the compressor as the operation analysis target may be installed in a place other than the factory.
Further, it is not essential that the threshold value setting means, the new control data output means, the model discrimination means, the lower limit value acquisition means, etc. are realized by one CPU (analyzer control means 9), and two CPUs are used. The CPU in which some of these means are realized and the CPU in which the other means are realized may be different from each other, or three or more CPUs may be used. An individual CPU may be assigned to each means.

1 ... Compressor operating state analyzer (analyzer), 8 ... Analytical device communication means (data acquisition means), 9 ... Analytical device control means (threshold setting means, new control data output means, model discrimination means) , Lower limit value acquisition means), AA1 ... 1st current value group (power related value), AA2 ... 2nd current value group (power related value), AA3 ... 3rd current value group (power related value), AA4 4th current value group (power related value), C1 ... 1st compressor (compressor), C2 ... 2nd compressor (compressor), C3 ... 3rd compressor (compressor), C4 ... 4th compressor ( Compressor), G ... Data acquisition gateway, PGV ... Pressure value group (pressure related value), PL ... Lower limit of pressure value, TH ... Threshold.

Claims (8)

1. A data acquisition means for acquiring a plurality of power-related values, which are values related to power consumption, and pressure-related values, which are values related to pressure, from one or more compressors.
   A threshold setting means for setting a threshold value for the power consumption for each compressor from a plurality of the power-related values and the pressure-related values.
   Have and
   The threshold value is considered to be in rated operation when the power consumption is equal to or higher than this threshold value, and is not considered to be in rated operation when the power consumption is less than this threshold value. A characteristic compressor operating condition analyzer.
2. Further, a model discriminating means for discriminating the model of the compressor from the plurality of the power-related values and the plurality of pressure-related values is provided.
   The operating state analysis device for a compressor according to claim 1, wherein the threshold value setting means sets the threshold value according to the model determined by the model determination means.
3. Further, a new control for outputting new operation control data of the compressor so that when the duration of the unrated operation analyzed by the threshold value is longer than a predetermined time, the duration is calculated to be within a specific time. The operating state analyzer for a compressor according to claim 1 or 2, wherein the data output means is provided.
4. A data acquisition means for acquiring a plurality of power-related values, which are values related to power consumption, and pressure-related values, which are values related to pressure, from one or more compressors.
   A model discriminating means for discriminating the model of the compressor from the plurality of the power-related values and the plurality of pressure-related values, and
   A compressor operating condition analyzer characterized by having.
5. The data acquisition means acquires the power-related value and the pressure-related value at predetermined cycles.
   The operating state analyzer for a compressor according to any one of claims 1 to 4, wherein the predetermined cycle is 30 seconds or less.
6. The operating state analysis device for a compressor according to any one of claims 1 to 5, wherein the electric power-related value is a current value supplied to the compressor.
7. The compressor operating state analyzer according to any one of claims 1 to 6, wherein the data acquisition means acquires the electric power-related value and the pressure-related value by communication.
8. Further, claim 1 to claim 1, wherein the compressor has a lower limit value acquisition means for acquiring the lower limit value of the pressure value, which is the lowest value of the pressure value among the plurality of pressure-related values. 7. The operating state analyzer for the compressor according to any one of 7.

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