CN108762236B

CN108762236B - Management system for mechanical equipment

Info

Publication number: CN108762236B
Application number: CN201810610413.XA
Authority: CN
Inventors: 太田雄也; 池村勇次; 清田规之; 坪仓彻哉; 户井田滋
Original assignee: Hitachi Industrial Equipment Systems Co Ltd
Current assignee: Hitachi Industrial Equipment Systems Co Ltd
Priority date: 2012-06-29
Filing date: 2013-06-28
Publication date: 2021-01-08
Anticipated expiration: 2033-06-28
Also published as: PH12014502861A1; TWI544299B; JP2014010685A; CN104246638B; MY167378A; CN104246638A; TW201418922A; CN108762236A; JP5887217B2; PH12014502861B1; WO2014003178A1; SG11201408638TA

Abstract

Provided is a management system for a machine device, which can accurately grasp the state of the machine device. The disclosed device is provided with: an operation information storage unit (104) that acquires operation information for one or more compressors (11) at each moment via a network (N1) and stores the operation information in association with identification information for the compressors (11); and an information processing means (109) for analyzing the operation tendency of the compressor (11) during a predetermined period based on the operation information read from the operation information storage means (104), associating the analysis result with the identification information of the compressor (11), and storing the result as operation information in the operation information storage means (107).

Description

Management system for mechanical equipment

The present application is a divisional application of an application having an application date of 2013, 28.6. 201380019609.7 and an invention title of "management system for mechanical equipment".

Technical Field

The present invention relates to a management system for managing information of a machine.

Background

The compressor is used in a wide range of fields such as manufacturing of chemical equipment and electronic equipment, food processing, and the like, and is indispensable in industry. In particular, in the field where oil is not desirable to be mixed into electronic equipment, food processing, and the like, there is an increasing demand for oil-free screw compressors that do not use oil.

Further, since the performance of the compressor significantly affects the productivity of the product, there is a demand for accurately grasping the state of the compressor.

For example, patent document 1 describes an abnormality prediction and life management system in which a customer's equipment and a monitoring system located at a remote location are connected by a communication line, and diagnostic information and determination information of the equipment are notified to the monitoring system.

In the technique described in patent document 1, each site checks the operating state of equipment installed at a remote place, notifies a production plant of the contents of the discovery of an abnormality and a countermeasure from the standpoint of an expert, and performs maintenance.

Documents of the prior art

Patent document 1: japanese patent laid-open publication No. 2003-50617

Disclosure of Invention

In the technique described in patent document 1, the contents of the discovery of an abnormality and the countermeasure are notified to the production plant from the expert's standpoint, but as the number of users (that is, the number of mechanical devices to be maintained) increases, it is difficult for the expert to perform all the countermeasures alone.

That is, a system for processing a large amount of information obtained from the machine devices via the network and accurately grasping the state of each machine device is required.

Therefore, an object of the present invention is to provide a management system for a machine tool, which can accurately grasp the state of the machine tool.

In order to solve the above problem, the present invention provides a management system for a machine, including: a storage unit for storing operation information, which is obtained via a network from the operation information of one or more machines at each moment and is stored in association with the identification information of the machines; and an information processing unit configured to analyze the operation tendency of the machine during a predetermined period based on the operation information read from the operation information storage unit, and store the analysis result in the operation information storage unit in association with the identification information of the machine.

The present invention can provide a management system for a mechanical device, which can accurately grasp the state of the mechanical device.

Drawings

Fig. 1 is a block diagram showing an outline of a management system according to an embodiment of the present invention.

Fig. 2 is a block diagram showing the structure of the compressor.

Fig. 3 is a graph showing a variation in discharge pressure of the compressor.

Fig. 4 is a block diagram showing the structure of the overall management center.

Fig. 5 is a sequence showing operations related to the acquisition and disclosure processing of the operation information.

Fig. 6(a) shows an example of a display of a login screen of a personal computer of a user, and (b) shows an example of a display of a selection screen displayed after login.

Fig. 7(a) shows an example of display of the operation information screen, and (b) shows an example of display of the setting information screen.

Fig. 8 is a sequence showing operations related to the process of acquiring failure and maintenance information.

Fig. 9 is a sequence showing operations related to the disclosure processing of the failure/maintenance information.

Fig. 10(a) shows an example of display of a failure/maintenance information screen, and (b) shows an example of display of a failure information screen in the case where a sensor abnormality has occurred.

Fig. 11 is a sequence showing operations related to the operation information acquisition and disclosure processing.

Fig. 12 shows an example of the display of the operation information screen, (a) shows an example of the screen display showing the transition of the unloading time, (b) shows an example of the screen display showing the transition of the unloading frequency, and (c) shows an example of the screen display showing the change of the discharge pressure.

Fig. 13 is a sequence showing operations related to the acquisition and disclosure processing of device information.

Fig. 14(a) is a graph showing changes in discharge pressure of a plurality of compressors, (b) is a graph showing changes in current value and load factor supplied to the compressors, and (c) is a graph showing changes in current value supplied to the compressors.

(symbol description)

A: a management system; 1: a global management center; 102 a: a first information acquisition unit; 102 b: a first information disclosure unit; 104: a work information storage unit (storage unit); 105: a setting information storage unit (storage unit); 106: a failure/maintenance information storage means (storage means); 107: an operation information storage unit (storage unit); 108: a device information storage unit (storage unit); 109: an information processing unit; 116: a second information management unit; 116 a: a second information acquisition unit; 116 b: a second information disclosure unit; 11. 211a, 211b, 221, 231: compressors (mechanical devices); 3: user PC (computer); n1, N2, N3: a network; 16: a blow-off valve; 18: a control unit.

Detailed Description

Embodiments of the present invention will be described in detail with reference to the accompanying drawings as appropriate. In the drawings, the same reference numerals are given to the common portions, and redundant description is omitted.

Detailed description of the preferred embodiments

< Structure of management System >

Fig. 1 is a block diagram showing an outline of a management system according to an embodiment of the present invention. The management system a of the present invention is a system of cloud computing in which a user can use services provided by server groups (the overall management center 1 and the like) existing on a network without recognizing the server groups.

The management system a includes a general management center 1,

device placement points

21, 22, and 23, a user PC3(Personal Computer), a research and development center 4, a service center 5, and an authentication server 6.

The overall management center 1 acquires the operation information transmitted from the respective

facility installation sites

21, 22, and 23 via the network N1 and the facility information of the compressor transmitted from the user PC3, and manages them together. In addition, the overall management center 1 provides various information about the compressor to the user PC3 via the network N2.

For example, the manufacturer of the compressor, the company operating the overall management center 1 for performing maintenance. The details of the overall management center 1 will be described later.

The

facility installation points

21, 22, and 23 shown in fig. 1 are installed in different regions, and one or more compressors are installed at each facility installation point. Incidentally, the enterprise, autonomous group operating equipment placement points 21, 22, 23 that own the compressor.

In the equipment installation point 21,

compressors

211a, 211b,

interfaces

212a, 212b, and a communication unit 213 are provided.

The compressor 211a is, for example, an oil-free screw compressor, and is driven by the control unit 18 (see fig. 2) in accordance with a preset program.

Incidentally, the control unit 18 transmits the operation information of the compressor 211a every moment (for example, every 1sec) to the overall management center 1 via the communication unit 213 and the network N1. The term "every moment" may be, for example, every 0.1sec or every several sec.

The compressor 211b and the interface 212b are the same as described above, and therefore, the description thereof is omitted. Note that the

device placement points

22 and 23 provided in a region different from the device placement point 21 are also the same as described above, and therefore, description thereof is omitted. The structure and control of each compressor will be described later.

The information transmitted from the

communication units

213, 223, 233 of the respective device placement points is encrypted and transmitted to the overall management center 1 via the network N1. Incidentally, the communication unit 101 (see fig. 4) provided in the overall management center 1 is configured to be able to decrypt the encrypted information received from each of the

communication units

213, 223, and 233 and identify which compressor the information is obtained from.

The user PC3 is installed in, for example, a central management room (not shown) at each equipment installation site, and can communicate with the overall management center 1 via the network N2. Then, by authentication with the authentication server 6, various information from the overall management center 1 is transmitted to the user PC 3. Incidentally, "user" means, for example, a manager of each device location point.

In fig. 1 (and fig. 4), although 1 user PC3 is shown, actually, there are a plurality of user PCs 3 such as a personal computer installed in a central management room at each equipment installation site, and a personal computer used by a user at a place other than the central management room using a wireless communication card.

The research and development center 4 acquires information stored in the storage units 104 to 108 (see fig. 4) of the overall management center 1, analyzes the information, and researches and develops a high-level management system. The research and development center 4 updates and upgrades versions of various applications used in the overall management center 1 via the network N3.

The service center 5 includes a service PC51 and a management PC 52.

The service PC51 can display the same image as the image displayed on the user PC3 owned by the user (for example, the images shown in fig. 7(a) and (b)) by, for example, a service person inputting the user's ID through an input unit (not shown).

Then, the service person who operates the service PC51 responds by communicating with the user by using mail, telephone, or the like while viewing the image when the compressor is out of order.

The management PC52 is installed in a management room or the like of the service center 5, and can acquire information stored in the storage units 104 to 108 of the overall management center 1 via the network N3 and the communication unit 118 (see fig. 4). The manager of the service center 5 constantly monitors information on each compressor displayed on the monitor of the management PC 52.

The authentication server 6 authenticates a user ID, which is unique information relating to an identifier of the user, and a password corresponding to the user ID, thereby confirming the validity of the user. For example, the authentication server 6 performs an authentication process using a public key and a secret key.

< Structure of compressor >

Fig. 2 is a block diagram showing the structure of the compressor. In addition, although the compressor 211a provided at the facility installation point 21 is described below, the

other compressors

211b, 221, and 231 (see fig. 1) have the same configuration.

The compressor 211a includes a compressor main body 11, an induction motor 12, a cooler 15, a blow-off valve 16, a control unit 18, and a starter disk or an inverter disk 19.

The compressor body 11 is, for example, an oil-free screw compressor, and includes a pair of male and female screw rotors (not shown) arranged such that rotation axes thereof are parallel to each other, and these are housed in a casing (not shown).

Further, a pinion gear (not shown) is provided at an axial end of the female screw rotor (not shown), and the pinion gear meshes with a helical gear provided at a rotating shaft of the induction motor 12. Timing gears (not shown) are attached to the male and female screw rotors, and the male and female screw rotors rotate synchronously by meshing of the timing gears.

The suction side of the compressor body 11 is connected to the suction port via a capacity adjustment valve 13 and a suction filter 14, and the discharge side of the compressor body 11 is connected to the discharge port via a cooler 15. The cooling water supplied from the inlet flows into the cooler 15 through the pipe a5, exchanges heat with the high-temperature and high-pressure gas discharged from the compressor body 11, and then flows out from the outlet through the pipe a 6.

Further, a blow-off valve 16 and a blow-off muffler 17 are connected to a pipe a4 branched from the pipe a3 in this order. The bleed valve 16 is opened during an unloading operation (no-load operation) described later and closed during a loading operation (load operation). In addition, the equipment structure of the compressor sometimes varies according to the user specification.

Further, a pipe a1 connected to the suction side of the compressor body 11 is provided with a suction pressure sensor P1 for detecting the pressure of the gas flowing into the compressor body 11 and a suction temperature sensor T1 for detecting the temperature of the gas.

Further, a pipe a3 that connects the compressor body 11 and the discharge port is provided with a discharge pressure sensor P2 that detects the pressure of the gas discharged from the compressor body 11 and cooled by the cooler 15, and a discharge temperature sensor T2 that detects the temperature of the gas.

Further, a cooling water inflow temperature sensor T3 that detects the temperature of the cooling water flowing into the cooler 15 is provided in the pipe a5, and a cooling water outflow temperature sensor T4 that detects the temperature of the cooling water flowing out of the cooler 15 is provided in the pipe a 6. In addition, the mounting position of each sensor may be changed according to the user specification.

Sensor information at every moment is input to the control unit 18 from each of the pressure sensors and the temperature sensor. That is, the control unit 18 receives operation information (suction pressure, discharge pressure, suction temperature, discharge temperature, current value, etc.) of the compressor 211a for every predetermined time (for example, 1 sec). The control unit 18 totally controls the driving of the compressor 211a based on the sensor information and the setting information.

The starter panel or the inverter panel 19 converts ac power supplied from an ac power supply (not shown) into dc power, converts the dc power into three-phase ac power corresponding to a command signal input from the control unit 18, and outputs the three-phase ac power to the induction motor 12. Further, the starter disk or the inverter disk 19 may be provided outside the compressor 211 a.

If three-phase ac power is input from the starter disc or the inverter disc 19 according to a command signal output from the control unit 18, the induction motor 12 rotates at a prescribed speed. As a result, the pinion (not shown) rotates, and the male and female screw rotors (not shown) rotate in synchronization with each other. Thus, the gas sucked in through the suction filter 14 and the capacity adjustment valve 13 is compressed by the compressor body 11, discharged as high-temperature and high-pressure gas, appropriately cooled by the cooler 15, and then guided to the discharge port. Incidentally, at the discharge port, a load (not shown) driven with compressed gas is connected. The control unit 18 may be provided outside the compressor 211 a.

In the following description, an arbitrary compressor (main body) is referred to as a "compressor", and an arbitrary control unit is referred to as a "control unit".

< Loading operation/unloading operation >

Fig. 3 is a graph showing a variation in discharge pressure of the compressor. In the compressor 11, a loading operation (load operation) and an unloading operation (no-load operation) are repeatedly performed. During the load operation, the control unit 18 drives the compressor 11 and adjusts the opening degree of the capacity adjustment valve 13 to close the bleed valve 16. Thus, the high-temperature and high-pressure gas discharged from the compressor 11 is guided to the discharge port via the pipe a2, the cooler 15, and the pipe a 3. In addition, the discharge pressure of the compressor 11 often increases during the charging operation.

Target discharge pressure P of the compressor 11 shown in fig. 3_αPressure of unloading P_β(>P_α) And a loading pressure P_γ(<P_α) Is preset. Incidentally, as for the discharge pressure of the compressor 11, the discharge pressure is measured by a discharge pressure sensor P2 (seeFig. 2) is detected and input to the control unit 18.

If the discharge pressure of the compressor 11 becomes the unloading pressure P_βAs described above, the control unit 18 drives the compressor 11 and opens the bleed valve 16 to perform the unloading operation. Thus, the gas discharged from the compressor 11 is branched to the blow-off valve 16 via the pipe a4 and discharged to the outside of the system via the blow-off port. In this way, during the unloading operation, the bleed valve 16 is opened to release a part of the high-pressure gas to the outside of the system, so that the discharge pressure gradually decreases. Incidentally, even in the case of performing the unloading operation, by continuously driving the induction motor 12, wasteful on/off is not performed, and high energy efficiency is maintained.

Thereafter, if the discharge pressure of the compressor 11 becomes the charging pressure P_γThereafter, the control unit 18 switches to the loading operation again to increase the discharge pressure. Thus, the discharge pressure P of the compressor 11 is held between the target discharge pressure P_αWithin a prescribed range (loading pressure P)_γP ≦ unloading pressure P_β) And (4) changing.

Incidentally, when the unloading operation is performed, the amount of high-pressure gas released to the outside of the system becomes an energy loss. Therefore, the shorter the time for performing the unloading operation, the higher the operation efficiency of the compressor 11.

< architecture of Overall management center >

Fig. 4 is a block diagram showing the structure of the overall management center. As shown in fig. 4, the overall management center 1 includes a communication unit 101, a first information management unit 102, various storage units 104 to 108, an information processing unit 109, a front-end server 115, and a second information management unit 116.

The communication unit 101 decrypts encrypted information received from the

communication units

213, 223, and 233 (see fig. 1) provided in the respective device placement points 21, 22, and 23.

The first information management unit 102 includes a first information acquisition unit 102a and a first information disclosure unit 102 b.

The first information acquiring unit 102a transmits a command signal for acquiring the operation information to the control unit 18 of the compressor 11 via the communication unit 101 and the network N1 every predetermined time (for example, 1 sec). Then, the first information acquiring unit 102a acquires the operation information transmitted from the control unit 18 at every moment according to the command signal via the network N1, the communication unit 101, and the F/W114a, and stores the operation information in the operation information storage unit 104 for each compressor 11.

When receiving a command signal for acquiring information on the compressor 11 from the user PC3, the first information disclosing unit 102b reads operation information and the like corresponding to the command signal from the storage means 104 to 107, and transmits the operation information and the like to the user PC3 via the communication means 112 and the network N2.

The F/W (Firewall Wall)103 serves as a security function for preventing a third person from illegally obtaining data stored in the storage units 104 to 108 of the overall management center 1.

In the operation information storage unit 104, the operation information of the compressor 11 is stored in the form of a database. The "operation information" includes instruction information (an unloading operation instruction, a loading operation instruction, and the like) output from the control unit 18 to the compressor 11 and sensor information detected by various sensors. In addition, identification information of each compressor 11 is added to the operation information transmitted from the control unit 18 to the overall management center 1.

In the setting information storage unit 105, setting information of the compressor 11 is stored in the form of a database. Incidentally, the setting information on the compressor 11 is acquired every predetermined period by the first information acquiring unit 102a, and is stored in the setting information storage unit 105 in association with the identification information of the compressor 11.

The failure/maintenance information storage unit 106 stores failure information and maintenance information of the compressor 11 in the form of a database. The "failure information" is output from the control unit 18, for example, when the discharge temperature of the compressor 11 is out of a preset temperature range, when the discharge pressure of the compressor 11 is lower than the load lower limit pressure, or the like.

The "maintenance information" is input from the information terminal 7 (see fig. 8) when the operator performs a repair or inspection operation.

The operation information storage unit 107 stores operation information such as the operation time and the number of operations of the compressor 11 in the form of a database. Incidentally, the "operation time" includes a loading operation time, an unloading operation time, and a stop time of the compressor 11. The "number of operations" includes the number of times the compressor 11 is unloaded and the number of times the power supply is turned on/off.

These pieces of information are obtained by the information processing unit 109 reading out and calculating the operation information stored in the operation information storage unit 104.

In the equipment information storage unit 108, equipment placement point names, site codes, compressor names, compressor codes, and the like are stored in the form of a database.

Further, in the equipment information storage unit 108, the equipment name, the equipment code, the model, the use time, the lifetime, the previous overhaul date, the overhaul result, the previous exchange date, the next exchange scheduled date, the stock count, and the like of the equipment constituting the compressor 11 are stored in the form of a database.

Incidentally, the device name, the device code, and the type are transmitted from the user PC3 to the overall management center 1 via the network N2 in advance, and are associated with the respective compressors 11 by the second information acquisition unit 116a and stored in the device information storage unit 108.

The information Processing Unit 109 is configured to include electronic circuits such as a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and various interfaces. The information processing unit 109 performs various processes according to a set program.

The details of the processing performed by information processing section 109 will be described later.

The bus 111 is connected to the first information managing section 102, the second information managing section 116, the storage sections 104 to 108, the information processing section 109, and the F/W117, and can exchange the information described above.

The communication unit 112 is a communication line for transmitting and receiving information between the user PC3, the authentication server 6, and the overall management center 1 via the network N2. After the authentication server 6 confirms the validity of the user, the communication unit 112 transmits the reception information to and from the front-end server 115 via the communication line corresponding to the user ID and the F/W114 b.

The F/

ws

114a and 114b have a security function for preventing a third person from intruding into the overall management center 1 from the outside and illegally obtaining data.

When the authentication process performed by the authentication server 6 is completed, the front-end server 115 outputs the user ID to the first information disclosure unit 102b and the second information disclosure unit 116 b. Incidentally, the user ID corresponds to one or more device location points at the time of registration. When a user who observes an image displayed on the monitor of the user PC3 makes a predetermined selection using an input means (not shown), the front-end server 115 outputs the selection information to the first information disclosure unit 102b or the second information disclosure unit 116 b.

Further, information provided to the user PC3 will be described later.

The second information management unit 116 includes a second information acquisition unit 116a and a second information disclosure unit 116 b.

The second information acquiring unit 116a acquires the device information from the user PC3 via the network N2 and the communication means 112, and stores the device information in the device information storage means 108 for each compressor 11.

When receiving a command signal for acquiring device information from the user PC3 of the user, the second information disclosure unit 116b reads the device information from the device information storage unit 108 in accordance with the command signal, and transmits the device information to the user PC3 via the communication unit 112 and the network N2.

The F/W117 has a security function for preventing a third person from intruding into the overall management center 1 from the outside and illegally obtaining data.

The communication unit 118 is a communication line for communicating with the research and development center 4 via the network N3.

< processing procedure of information disclosure service >

Hereinafter, a case of acquiring and disclosing information on a compressor installed in the equipment installation point 21 will be described as an example.

(1. working information)

In step S101, the first information acquisition unit 102a (see fig. 4) transmits a transmission command signal of the operation information to the control unit 18 (see fig. 2) of the compressor 11 via the communication unit 101, the network N1, and the communication unit 213 (see fig. 1). Next, in step S102, the control unit 18 transmits the operation information corresponding to the operation information transmission command to the first information acquisition unit 102 a. The content of the operation information is not described above.

In step S103, the first information acquisition unit 102a stores the operation information of the compressor 11 received from the control unit 18 in the operation information storage unit 104. The processing of steps S101 to S103 described above is repeatedly executed every predetermined time (for example, 1.0 sec).

The process of step S101 may be omitted, and the control unit 18 may automatically transmit the operation information to the first information acquiring unit 102 a.

In step S104 of fig. 5, the user who manages the apparatus installation point 21 accesses a site of the compressor remote monitoring service provided by the overall management center 1 by operating an input section (not shown) of the user PC 3. Thus, for example, a login screen G1 as shown in fig. 6(a) is displayed on the monitor of the user PC 3.

The user operates the input unit of the user PC3, inputs a user ID in the user ID column G101, inputs a password in the password column G102, and clicks the login button G103. Thereby, the user ID and the password are transmitted to the authentication server 6 via the network N2.

Next, in step S105, the authentication server 6 performs the authentication process described above. In the authentication server 6, if the validity of the user is confirmed, a screen G2 shown in fig. 6(b) is displayed on the monitor of the user PC 3.

The "device monitoring service" shown in fig. 6(b) means: the user is allowed to view the operation information, setting information, failure/maintenance information, or operation information of the compressor.

The "maintenance management service" shown in fig. 6(b) is: and a service for making the user to read the equipment information of the compressor.

When viewing the operation information of the compressor 11, the user selects the "device monitoring service" G201 shown in fig. 6 (b). By this operation, in step S106 in fig. 5, an acquisition instruction signal of the operation information is transmitted from the user PC3 to the first information disclosure unit 102 b.

Next, in step S107, the first information disclosure unit 102b searches for operation information of the device placement point corresponding to the user ID from among the operation information stored in the operation information storage unit 104, and acquires the operation information (step S108). Then, in step S109, the first information disclosure unit 102b transmits the acquired job information to the user PC 3.

Thus, the job information screen G3 shown in fig. 7(a) is displayed on the monitor of the user PC 3. In a symbol G301 shown in fig. 7(a), the name of the device placement point (device placement point 1) is displayed. In addition, by pulling down "compressor No" at reference G302, the compressor (for example, compressor No.1) that the user desires to view can be selected.

In the example shown in fig. 7 a, it is understood that at the present time (the time point when the user visits the site of the overall management center 1), the suction pressure of the compressor 11 is PPP1kPa, and the suction temperature is TTT1 ℃.

It is preferable that the information shown in fig. 7(a) be displayed beside the structure diagram of the compressor shown in fig. 2 to make it easy for the user to see.

(2. setting information)

The sequence of the setting information on the compressor 11 is the same as the sequence of the operation information (see fig. 5), and therefore, the description thereof is omitted.

When the validity of the user is authenticated and the user views the setting information, the setting information screen G4 shown in fig. 7(b), for example, is displayed on the user PC 3. In fig. 7(b), as "set pressure", the unload pressure: 880kPa, loading pressure: 830kPa, lower limit load pressure: 400kPa, target pressure: 860 kPa.

Incidentally, the "lower limit load pressure" means: as the lower limit value permitted for the discharge pressure of the compressor 11. If the discharge pressure detected by the discharge pressure sensor P2 (refer to fig. 2) is lower than the load lower limit pressure, the control unit 18 transmits failure information to the overall management center 1 while continuing the driving of the compressor 11.

(3. failure maintenance information)

Fig. 8 is a sequence showing operations related to acquisition and disclosure processing of failure and maintenance information.

In step S201, the first information acquisition unit 102a (see fig. 4) transmits a transmission command signal of failure information to the control unit 18 (see fig. 2) via the communication unit 101 and the network N1. In step S202, when a failure corresponding to the command occurs within a predetermined time, the control unit 18 transmits the failure to the first information acquisition unit 102a in association with the identification information of the compressor 11. Next, in step S203, the first information acquisition unit 102a stores the failure information in the failure/maintenance information storage unit 106.

Next, in step S204, the first information acquisition unit 102a transmits the failure information received from the control unit 18 to the management PC52 (see fig. 1). Thus, the manager of the service center 5 (see fig. 1) can know the failure at substantially the same timing as when the failure occurs at the site where the compressor 11 is installed. Therefore, the service person in the service center 5 can promptly contact the user at the equipment installation site where the trouble has occurred by using mail, telephone, or the like.

Next, in step S205, the management PC52 transmits the failure information to the information terminal 7. The information terminal 7 is, for example, an information terminal held by an operator (in the vicinity of a device placement point where a failure has occurred) of the service center 5. The processing of steps S201 to S205 is repeatedly executed (or detection of occurrence of a failure is triggered) every predetermined time.

Note that the processing in step S201 may be omitted, and when a failure occurs, failure information may be automatically transmitted from the control unit 18 to the first information acquisition unit 102 a.

Next, in step S206, maintenance information is stored in a storage unit (not shown) of the information terminal 7 by an operator who has repaired (or overhauled) the failure. In step S207, the information terminal 7 transmits the maintenance information to the first information acquisition unit 102a as a trigger when the transmission button is pressed by the operator. The maintenance information includes identification information of the compressor 11 to be maintained, time information, maintenance contents, and a maintenance result.

Next, in step S208, the first information acquisition unit 102a stores the maintenance information received from the information terminal 7 in the failure/maintenance information storage unit 106 in association with the failure information transmitted in step S204.

The information is also stored in the device information storage unit 108 in association with the devices constituting the compressor 11.

Next, in step S209 of fig. 9, the user PC3 transmits the user ID and the password to the authentication server 6 via the network N2, and in step S210, the authentication server 6 transmits the authentication result to the user PC 3. After the authentication by the authentication server 6, in step S211, the user PC3 transmits a failure/maintenance information acquisition command signal to the first information disclosure unit 102 b.

Next, in step S212, the first information disclosure unit 102b searches for and acquires the trouble/maintenance information at the facility location corresponding to the user ID from the trouble/maintenance information storage unit 106 (step S213). Next, in step S214, the first information disclosure unit 102b transmits the failure/maintenance information to the user PC 3.

Thus, the failure/maintenance information screen G8 shown in fig. 10 is displayed on the monitor of the user PC 3. On the failure/maintenance information screen G8, failure/maintenance information up to the point in time when the user visits the site of the compressor remote monitoring service (or the month designated by the user) is displayed.

In the example shown in fig. 10(a), the date and time of occurrence, the message, and the recovery time are displayed in order from the left. For example, if the display screen G8 is referred to, it can be seen that 18: 00, sensor abnormality occurs, 18: 30, recovering.

Then, if the user clicks the "sensor abnormality" column via an input unit (not shown), for example, a failure information screen G9 shown in fig. 10(b) is displayed. In this example, when an abnormality occurs in the suction temperature sensor T1 (see fig. 2), the compressor 11 and the main motor (induction motor 12) are stopped, and the APC (Active Power Control) setting, the PSC (Power Save Control) setting, and the ASS (Auto Start & Stop) setting are temporarily invalidated. Further, the details of APC, PSC, ASS are omitted from the description.

In this way, the user can easily view the failure/maintenance information of the compressor 11 by accessing the general management center 1 through the network N2.

(4. operational information)

In step S301, the information processing unit 109 retrieves operation information of the compressor 11 from the operation information storage unit 104, and acquires predetermined operation information (step S302). Next, in step S303, information processing section 109 calculates the operation time and the number of operations based on the acquired operation information.

As described above, "working hours" means: for example, the load operation time, the unload operation time, and the stop time of the compressor 11. In addition, the "number of operations" means: for example, the number of times of unloading, the number of times of turning on/off the compressor 11.

The operation information includes the life service time of the compressor 11, the previous replacement date, and the like. The life service time and the previous replacement date of the compressor 11 are input via the information terminal 7 (see fig. 8), for example, by an operator who performs part replacement, maintenance work, and the like of the compressor 11.

In step S304, the information processing unit 109 calculates the operation time and the number of times (i.e., operation information) of each compressor 11, and stores the operation time and the number of times in the operation information storage unit 107.

In step S305, the user PC3 transmits the user ID and the password to the authentication server 6 via the network N2, and the authentication server 6 performs authentication processing in step S306.

After the authentication process is completed, the user selects "viewing of the operation information" of the compressor 11. By this operation, in step S307, an acquisition instruction signal of the operation information is transmitted from the user PC3 to the first information disclosure unit 102 b.

Next, in step S308, the first information disclosure unit 102b retrieves operation information of the device placement point corresponding to the user ID from the operation information storage unit 107, and acquires the operation information (step S309). Further, in step S310, the first information disclosure unit 102b transmits the operation information to the user PC 3. Thus, for example, the operation information screen shown in (a) to (c) of fig. 12 is displayed on the monitor of the user PC 3.

Fig. 12(a) is a screen display example showing the transition of the uninstallation time. In fig. 12(a), the horizontal axis indicates the date (in 4 months 2012), and the vertical axis indicates the total time of the unloading operation (unloading time) for each date. By viewing this screen G5, the user can easily grasp the transition of the unloading time. Further, the transition of the unloading time in months and the transition of the unloading time in years may be displayed.

Further, the user PC3 may display the cumulative value of the unloading time or the unloading number from the installation of the compressor 11 to the predetermined date and time.

Fig. 12(b) is a screen display example showing the transition of the unloading number. The horizontal axis of fig. 12b indicates the date (in 4 months 2012), and the vertical axis indicates the number of times of switching from the loading operation to the unloading operation (the number of times of unloading). The user can easily grasp the transition of the number of unloads per date by viewing the screen G6 shown in fig. 12 (b).

Fig. 12(c) is a screen display example showing a change in discharge pressure of the compressor. In fig. 12 c, the horizontal axis represents the time (on day 4/1 of 2012), and the vertical axis represents the discharge pressure of the compressor 11.

When viewing the history of the operating state of the compressor 11, the user selects "viewing the operation information" (not shown) on the selection screen, and further selects "discharge pressure" (not shown) on a specific date on a pull-down menu or the like.

This allows the user to easily grasp the operation state of the compressor 11 at the past specific date and time. Incidentally, in fig. 12(c), the change in the discharge pressure in a specific date is shown, but an average value of the discharge pressure in units of months, for example, may be displayed, and the change in the discharge temperature may be displayed.

(5. device information)

Next, a maintenance management service in the compressor monitoring service will be described. Fig. 13 is a sequence showing operations related to the acquisition and disclosure processing of device information.

In step S401, the user PC3 transmits the user ID and the password to the authentication server 6 via the network N2, and in step S402, the authentication server 6 performs authentication processing. Thus, a screen G2 shown in fig. 6(b) is displayed on the monitor of the user PC 3.

Further, if the user selects "maintenance management service" G202 shown in fig. 6(b), the screen transitions to a screen (not shown) to which the device information can be added. The user designates a specific compressor 11, adds information such as the equipment name, equipment code, model, last replacement date, and the number of storages of the designated compressor 11 in a file format, and transmits the file to the overall management center 1 (step S403).

When the manager at each equipment installation site performs registration processing and update processing of the compressor remote monitoring service, the manager performs the processing.

Next, in step S403, the user PC3 transmits the device information to the second information acquisition unit 116 a. Next, in step S404, the second information acquisition unit 116a stores the received device information in the device information storage unit 108 in association with the compressor 11 selected by the user.

When the user desires to view the device information of the device installation point managed by the user, the user operates the user PC3 to access the general management center 1. That is, in step S405 of fig. 13, the user PC3 transmits the user ID and the password to the authentication server 6 via the network N2, and in step S406, the authentication server 6 performs the authentication process.

Next, in step S407, the user PC3 transmits an acquisition instruction signal of the device information to the second information disclosure unit 116 b. In addition, in the case where there are a plurality of compressors 11 at the equipment location point, among the plurality of compressors displayed in the screen (not shown) of the user PC3, the user selects a specific compressor 11 via the input unit.

Next, in step S408, the second information disclosure unit 116b searches for and acquires the equipment information on the compressor 11 specified by the user from the equipment information stored in the equipment information storage unit 108 (step S409).

Next, in step S410, the second information disclosing unit 116b transmits the device information to the user PC 3. Thereby, a device information screen (not shown) is displayed on the monitor of the user PC 3.

Further, on the device information screen, a device name, a device code, a type, a cumulative time of use, a lifetime used time, a failure history, a previous replacement day, a next replacement scheduled day, a stock count, and the like are displayed.

< analysis of operating tendency >

(A. Change of set value)

As described above, the target discharge pressure P of the compressor 11_α(refer to fig. 3) is preset, in the control unit 18, if the discharge pressure is the unloading pressure P_β(>P_α) As described above, the dump valve 16 (see fig. 2) is opened to switch to the unloading operation (no-load operation). Otherwise, if the discharge pressure is the loading pressure P_γThereafter, the control unit 18 closes the bleed valve 16 and switches to the loading operation (load operation). Incidentally, since the compressed air is discharged to the outside of the system in the unloading operation, the smaller the time (proportion) for performing the unloading operation, the greater the energy efficiency of the compressor 11.

Thus, the relief pressure P_βThe setting of (b) has a great influence on the energy efficiency of the compressor 11.

When the user who observes the monitor of the user PC3 selects "energy saving operation" (not shown) via an input unit (not shown), the information processing unit 109 executes the following processing, for example.

That is, the information processing unit 109 reads out the operation information of the compressor 11 corresponding to the user ID from the operation information storage unit 104. The operation information storage unit 104 stores information indicating which of the load operation and the no-load operation is performed in the compressor 11, in association with the identification information and the time information of the compressor 11.

Then, the information processing unit 109 determines whether or not the proportion of the unloading time is equal to or greater than a predetermined value (or whether or not the number of times of unloading is equal to or greater than a predetermined number of times) as the operation tendency of the compressor 11 in a predetermined period set in advance.

For example, when the proportion of the unloading time is equal to or greater than a predetermined value, the information processing unit 109 analyzes the operation information of the compressor 11 and calculates the unloading pressure at which the proportion of the unloading time is smaller than the predetermined value. In this analysis process, a method may be used in which the operation of the compressor 11 is simulated one or more times using the plant information (specification information) stored in the plant information storage unit 108, and the result of the simulation in which the proportion occupied by the unloading time is the smallest is selected as the unloading pressure. The unloading pressure may be determined by other methods (statistical method, learning process, etc.) using the operation information of the compressor 11. Then, the information processing unit 109 transmits the determined unloading pressure to the user PC3 corresponding to the compressor 11 via the network N2.

Incidentally, the set value other than the relief pressure can be presented to the user by the same method as described above.

Further, a set value such as the discharge pressure may be determined based on the load factor of the compressor 11 (the proportion of the discharge time within a predetermined time), and may be transmitted to the user PC 3. In this case, the information processing unit 109 calculates the load factor from the current value supplied to the compressor 11 during a predetermined period, and stores the load factor in the operation information storage unit 104 in association with the identification information of the compressor 11. When the average value of the load factors is lower than the predetermined value, the information processing unit 109 determines a set value for setting the load factor to be equal to or higher than the predetermined value by analysis processing of the operation information, and transmits the set value to the user PC3 corresponding to the compressor 11 via the network N2.

In the analysis process, various methods such as simulation, statistical method, learning process, and the like can be used. The set value other than the relief pressure may be presented to the user by the same method as described above.

Further, the operation information of the other compressors 11 stored in the operation information storage unit 104 may be searched, and the setting value may be determined based on the search result. In this case, the information processing unit 109 retrieves a prescribed number (for example, 100) of the compressors 11 having the same equipment name, equipment code, and model as the user-managed compressor 11 from the equipment information storage unit 108. Then, the information processing unit 109 searches for a compressor that is close to the operating condition of the compressor 11 of the user among the plurality of compressors 11 to be compared.

Further, the information processing unit 109 searches for the compressor 11 having the smallest unloading time (or the smallest unloading time) and the number of failures equal to or less than a predetermined value from among the plurality of locked compressors 11. Then, the information processing unit 109 sends the unloading pressure of the compressor 11 to the user PC3 via the network N2.

When the value of the unloading pressure is set to the unloading pressure of the compressor 11 managed by the user, the unloading time is more likely to be shorter than before, and the operation efficiency of the compressor 11 can be improved.

The set value other than the relief pressure may be presented to the user by the same method as described above.

(B. proposal for next replacement)

Fig. 14(a) is a graph showing temporal changes in discharge pressure of a plurality of compressors. At times t1 to t2 and t3 to t4 shown in fig. 14(a), the first compressor (target discharge pressure P)_A) Driven, and the second compressor (target discharge pressure P) is started from time t2 to t3_B>P_A) Is driven.

That is, in fig. 14(a), the 2 compressors 11 having different target discharge pressures are alternately driven every predetermined time. Incidentally, regarding the case where the 2 compressors 11 are alternately driven in this way, at the time of registration of the compressor remote monitoring service, at the time of update, for example, the user PC3 is transmitted to the overall management center 1 and stored in the setting information storage unit 105.

The information processing unit 109 executes the following processing when creating information provided to the user, for example, regarding the compressor 11.

That is, in information processing section 109, when the average value of the discharge pressures is larger than the target discharge pressure by a predetermined value or more as the operation tendency of compressor 11 in a predetermined period, the candidate (1 or more) of the compressors whose discharge pressures are closer to the target discharge pressure than the compressor 11 is searched from equipment information storage section 108.

Incidentally, in the equipment information storage unit 108, in addition to information on the compressor 11 of each user, specification information of all the compressors 11 that the service center 5 can correspond to is stored.

The information processing unit 109 sends the retrieval result to the user PC3 via the network N2.

Further, the information processing unit 109 may present, from the search result, a combination that is cheaper than the total price of the compressors 11 (the first compressor and the second compressor) currently owned by the user to the user. Thus, when the user changes the compressor, the user can select a compressor that is lower in price than the currently operating compressor 11 and that satisfies the condition (target discharge pressure or the like) requested by the user.

Fig. 14(b) shows a graph (upper) showing a change in the current value supplied to the compressor and a graph (lower) showing a change in the load factor of the compressor. The operation information stored in the operation information storage unit 104 includes a current value to be supplied to the compressor 11.

In addition, in the change of the current value shown in the upper part of fig. 14(b), the current value I_ACurrent value I corresponding to load operation_BCorresponding to the unloading operation. Further, the load factor shown in the lower part of FIG. 14(b) isThe proportion of the unloading time based on the predetermined time (100%) is calculated every predetermined time.

That is, the information processing unit 109 reads the current value of the target compressor 11, and calculates the load factor in a predetermined period from the current value. Then, the information processing unit 109 determines whether or not the average value of the load factors in the predetermined period is lower than a predetermined value as the operation tendency of the compressor 11. When the average value of the load factors is lower than the predetermined value, the information processing unit 109 determines a compressor candidate whose load factor is equal to or higher than the predetermined value, based on the operation information of the other compressors 11 stored in the operation information storage unit 104.

The information processing unit 109 selects one or more of the compressor candidates from among the compressors 11 that operate under the same conditions (for example, target discharge pressure) as the target compressor 11.

Thus, when a user who manages the compressor 11 purchases a compressor, the user can select a compressor having a higher load factor (i.e., higher operating efficiency) than the currently operating compressor 11 from the plurality of compressor candidates.

(C. abnormal sign judgment processing)

The information processing unit 109 of the overall management center 1 determines whether there is a sign of abnormality in the compressor 11 based on the operation information stored in the operation information storage unit 104. That is, the information processing unit 109 determines whether or not there is a sign of an abnormality in the compressor 11, for example, based on a change rate of at least one of the suction temperature and the discharge temperature as the operation tendency of the compressor 11 in a predetermined period.

For example, the information processing unit 109 calculates an average change rate (increase rate) of the discharge temperature of the compressor 11 within 1 year, and determines that there is a sign of abnormality when the average change rate is equal to or greater than a predetermined value.

Then, the information processing unit 109 sends information on the sign of abnormality to the user PC3 corresponding to the compressor 11 via the network N2.

For example, an allowable range of the suction temperature (or the discharge temperature) of the compressor 11 may be set in advance, and the occurrence timing of an abnormality in the compressor 11 may be predicted from an average change rate of the actual suction temperature (or the discharge temperature) of the compressor 11 in a predetermined period and transmitted to the user PC 3.

This allows the user to easily know the presence or absence of an abnormality sign and the abnormality occurrence time of the compressor 11 managed by the user.

Instead of the suction temperature and the discharge temperature of the compressor 11, the presence or absence of the abnormality indication may be determined based on other operation information such as the suction pressure and the discharge pressure of the compressor 11, or the current value supplied to the compressor 11. Further, they may be appropriately combined for determination.

(D, maintenance attention reminder)

Fig. 14(c) is a graph showing a change in the current value supplied to the compressor. The current value I shown in FIG. 14(c)_CCurrent value I corresponding to load operation_DCorresponding to the unloading operation.

However, in the compressor 11, the continuation time of the unloading operation exceeds the predetermined value Δ t₀In the case of (2), the operation may be automatically stopped (i.e., the driving of the induction motor 12 is stopped). Thus, although the energy-saving operation can be performed, if the stopped state of the compressor 11 continues for a long time, a trouble may occur at the next start or the like.

Therefore, when there is a compressor 11 whose stop period is equal to or longer than a predetermined period, the information processing unit 109 refers to the operation information storage unit 104, and transmits information for prompting maintenance of the compressor 11 to the user PC3 corresponding to the compressor 11 via the network N2.

For example, when the first information acquiring unit 102a acquires the operation information, if the stopped state of the compressor 11 is detected, the value of the counter is incremented, and the value is stored in the operation information storage unit 104 in association with the identification information of the compressor 11, so that the operation stop period of the compressor 11 can be grasped.

The information processing unit 109 refers to the operation information storage unit 104, and transmits information urging maintenance of the compressor 11 to the user PC3 when the value of the counter indicating the stop period of the compressor 11 is equal to or greater than a predetermined value.

Thus, the user who manages the compressor 11 can easily grasp that the compressor 11 managed by the user has stopped for a long period of time and needs maintenance.

(E. calculation of part replacement date)

As described above, in the operation information storage unit 107 of the overall management center 1, the lifetime usage time and the last replacement date of the equipment (parts) constituting the compressor 11 are stored. The information processing unit 109 calculates the cumulative use time of each device based on the work information stored in the work information storage unit 104. Here, "cumulative use time" means: the cumulative value of the usage time until the present (at the time of cumulative time calculation) when the last replacement day is the reference with respect to the specific device.

Then, information processing section 109 calculates the next expected replacement date for each device based on the cumulative usage time, the life usage time read from operation information storage section 107, and the previous replacement date, and stores the calculated expected replacement date in operation information storage section 107 in association with the identification information of the target device.

Further, information processing section 109 calculates a period until the lifetime usage time is reached from the increase rate of the cumulative usage time, and determines "the next replacement scheduled day" as the date when the period has elapsed since the previous replacement date.

Then, in the information processing unit 109, if the next replacement predicted day is close (for example, if it is one month ago), information on the next replacement predicted day is transmitted to the user PC3 via the network N2.

This allows the user to easily grasp the planned replacement date of each component constituting the compressor 11. Therefore, the management burden on the user is reduced.

< effects >

According to the management system a for mechanical equipment of the present embodiment, only the minimum connection environment (the user PC3, the mobile terminal, the browser, the communication means, and the like) to be prepared by the user is provided, and the overall management center 1 can collectively manage the compressors 11. Therefore, the operation information and the equipment information of the compressor 11 can be provided to the user without largely changing the existing compressor 11 at each equipment installation point.

In the management system a of the present embodiment, information on the compressors 11 at the respective equipment installation points is stored in the storage units 104 to 108 of the overall management center 1. Therefore, it is not necessary to provide a large-capacity storage device in each equipment location, and the cost at each equipment location is suppressed.

Further, the user is given an ID and a password corresponding to the device installation point registered by the user, and can connect to the cloud computing network and grasp the status of the compressor 11 in real time as long as there is an internet connection environment.

In the present embodiment, the set value (unloading pressure, etc.) is determined so that the percentage occupied by the unloading operation of the compressor 11 is smaller than the predetermined value based on the operation information of the other compressor 11, and is transmitted to the user PC3 via the network N2.

In this way, the compressor 11 performing stable energy saving operation can be searched using a large amount of data stored in the storage means 104 to 108, and the set value can be presented to the user.

Therefore, the user can change the set value of the compressor 11 to an appropriate value within the design range based on the presented information. That is, an allowable range in which the set value of the compressor 11 can be changed can be set in advance, and a user can be presented with a more appropriate set value within the range.

In the present embodiment, when the average value of the discharge pressures of the compressors 11 is greater than the target discharge pressure by a predetermined value or more, the device information storage unit 108 searches for a candidate compressor that brings the discharge pressure close to the target discharge pressure, and transmits the candidate compressor to the user PC3 via the network N2.

When the average value of the load rates of the compressors 11 is lower than the predetermined value, the device information storage unit 108 searches for a candidate compressor having a load rate equal to or higher than the predetermined value, and transmits the candidate compressor to the user PC3 via the network N2.

Thus, the user can select a compressor that can be operated more energy-efficiently than the currently operating compressor 11 from one or more compressor candidates at the next replacement of the compressor 11.

In the present embodiment, the presence or absence of an abnormality indication in the compressor 11 is determined based on the rate of change in at least one of the suction temperature and the discharge temperature, and the abnormality indication is transmitted to the user PC3 via the network N2.

In the detection of the sign of abnormality related to the compressor 11, it is necessary to grasp the long-term transition of the operation information. When each user purchases a computer that stores and processes huge amounts of data, it is very costly. In the present embodiment, since the overall management center 1 manages the operation information and the like of the compressor 11, the processing load on the user is reduced, and the cost for managing the compressor 11 can be reduced.

In the present embodiment, when the stop period is equal to or longer than the predetermined period, information for urging maintenance of the compressor 11 is transmitted to the user PC3 via the network N2. Therefore, it is possible to prevent a trouble from occurring at the next start due to the compressor 11 being stopped for a long period of time, and the user can study the execution or request of maintenance at an early stage.

In addition, in order to perform replacement when the life of the compressor 11 has expired or replacement due to a failure, it is necessary to secure in advance an inventory of equipment (parts) constituting the compressor 11 at an equipment installation site. Conventionally, since the lifetime of a device varies depending on the type of the device, the operation history, the contents of a failure, and the like, it is necessary to make the stock count have a certain margin.

In contrast, in the present embodiment, the equipment information of the compressor 11 is collectively managed by a cloud computing system. Then, for example, in the case where it is necessary to replace the equipment constituting the compressor 11, the information is transmitted from the overall management center 1 (or the service center 5) side to the user PC 3. Therefore, the burden of management on the user required for maintenance and component replacement of the compressor 11 can be significantly reduced.

Modifications of the examples

In the above embodiment, the oil-free screw compressor is exemplified, but not limited thereto. That is, the present invention can be applied to other types of compressors (e.g., a turbine type, a vane type, and a diaphragm type). In the above embodiment, the case where the management target by the overall management center 1 is the compressor has been described, but the present invention is not limited to this. For example, other types of mechanical equipment such as power generation equipment, nuclear power equipment, and water treatment equipment can be managed.

In addition, a plurality of types of mechanical devices may be managed, except for the case where the type of the object managed by the overall management center 1 is singular (for example, only a compressor). In this case, an identification mark indicating the type of the machine is added to the operation information and the like.

In the above embodiment, the case where the authentication server 6 is provided outside the overall management center 1 has been described, but the present invention is not limited to this. That is, the authentication server may be provided in the overall management center 1.

In the above embodiment, the case where the overall management center 1 acquires the operation information such as the suction/discharge pressure and the suction/discharge temperature of the compressor 11 has been described, but the present invention is not limited thereto. That is, information on the ambient temperature and vibration of the compressor 11 may be added to the operation information.

In the above embodiment, the case where the information processing unit 109 of the overall management center 1 performs the analysis processing of the operation tendency of the compressor 11 has been described, but the present invention is not limited to this. For example, the analysis process may be executed in the research and development center 4, and the analysis result may be disclosed from the service center 5 to the user PC 3.

Claims

1. A management system for a machine tool, comprising:

a storage unit for storing operation information, which is obtained via a network from the operation information of one or more machines at each moment and is stored in association with the identification information of the machines; and

an information processing means for analyzing the operation tendency of the machine during a predetermined period based on the operation information read from the operation information storage means, and storing the result of the analysis in the operation information storage means in association with the identification information of the machine,

the mechanical device is a compressor and the mechanical device is a compressor,

the operation information includes information indicating which one of a load operation and a no-load operation is performed in the compressor,

the information processing unit analyzes the operation tendency of the compressor during a predetermined period, determines a set value for making the proportion occupied by the no-load operation smaller than a predetermined value based on the analysis of the operation information when the proportion occupied by the no-load operation is greater than or equal to the predetermined value, and transmits the set value to a computer of a user corresponding to the compressor via a network.

2. A management system for a machine tool, comprising:

the management system of the mechanical equipment is provided with a storage unit for storing the specification information of the compressor,

the operation information includes a discharge pressure of the compressor,

in the information processing means, the operation tendency of the compressor during a predetermined period is analyzed, and when the average value of the discharge pressure is greater than a target discharge pressure by a predetermined value or more, a compressor candidate whose discharge pressure is closer to the target discharge pressure than the compressor is retrieved from the storage means of the specification information, and the compressor candidate is transmitted to a computer of a user corresponding to the compressor via a network.

3. A management system for a machine tool, comprising:

the operation information includes a current value supplied to the compressor,

the information processing means analyzes the operation tendency of the compressor during a predetermined period, determines a set value for setting the load factor to be equal to or greater than a predetermined value based on the analysis of the operation information when the average value of the load factors calculated from the current value is less than the predetermined value, and transmits the set value to a computer of a user corresponding to the compressor via a network.

4. The management system of mechanical equipment according to any one of claims 1 to 3,

the operation information includes a suction temperature and a discharge temperature of the compressor,

the information processing unit analyzes the operation tendency of the compressor during a predetermined period, determines that there is a sign of abnormality in the compressor when the rate of increase in at least one of the suction temperature and the discharge temperature is equal to or greater than a predetermined value, and transmits the sign of abnormality to a computer of a user corresponding to the compressor via a network.

5. The management system of mechanical equipment according to any one of claims 1 to 3,

the operation information includes a stop period of the compressor,

the information processing unit analyzes the operation tendency of the compressor, and when the stop period is equal to or longer than a predetermined period, transmits information for urging maintenance of the compressor to a computer of a user corresponding to the compressor via a network.