Machine management system

Abstract

A machine management system includes a machine information storage section that stores machine information related to a plurality of equipment machines, a condition information storage section that stores determination conditions for determining a maintenance target from the plurality of equipment machines, and a machine list generation section that generates a machine list (24) of target machines that are the maintenance target. The machine list generation section determines the target machines that are the maintenance target by comparing the machine information stored in the machine information storage section and the determination conditions stored in the condition information storage section.

Description

Technical Field

[0001] This disclosure relates to a machine management system for managing machines. Background Technology

[0002] Patent Document 1 discloses technology related to a machine management system for performing machine maintenance. According to the technology in the aforementioned document, the machine management system (in the document, an information processing device) is connected to the user's information terminal and the information terminal of a shop where the refrigeration unit can be maintained. The machine management system sends periodic maintenance information, based on operating status information corresponding to the refrigeration unit, to the user's information terminal and the shop's information terminal.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-107466 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] In a machine management system that manages multiple machines, the manager may not be able to easily identify the machine that needs maintenance. Therefore, a machine management system is provided that can easily identify the machine that needs maintenance.

[0008] Technical solutions adopted to solve technical problems

[0009] The machine management system for solving the above-mentioned technical problems includes: a machine information storage unit that stores machine information related to multiple machines; a condition information storage unit that stores determination conditions for identifying maintenance targets from the multiple machines; and a machine list generation unit that generates a machine list of target machines for maintenance. The machine list generation unit determines the target machines for maintenance by comparing the machine information stored in the machine information storage unit with the determination conditions stored in the condition information storage unit. Based on this structure, compared to separately checking the past maintenance history of multiple machines to determine whether they are suitable for current maintenance, the machine to be maintained can be determined more easily.

[0010] In the aforementioned machine management system, the machine information storage unit is configured as a different device from the condition information storage unit. Based on this structure, compared to managing merged information (which combines information processed by the machine information storage unit and information processed by the condition information storage unit) in a single storage unit, the overall storage capacity of the two storage units managing the information (i.e., the machine information storage unit and the condition information storage unit) can be smaller.

[0011] In the machine management system described above, the machine list generation unit updates the determination conditions based on change information related to the determination conditions obtained through an interface. According to this structure, since the determination conditions of the machine management system can be updated when changes are needed, the maintenance targets can be easily determined based on the changed determination conditions.

[0012] In the aforementioned machine management system, the machine information includes information related to the product classification of the equipment machine. The determination conditions include: the product classification as information for determining the equipment machine; and a maintenance frequency set according to the product classification as information for determining the maintenance time of the equipment machine. The machine list generation unit determines the target machine that is subject to maintenance at a specified time from a plurality of equipment machines based on the product classification and the maintenance frequency set according to the product classification. According to the above structure, when the maintenance frequency is set according to the product classification, the target machine that is subject to maintenance at a specified time can be easily determined.

[0013] In the aforementioned machine management system, the machine list generation unit determines the target machine for the next maintenance based on the elapsed period since the last maintenance of the equipment and the maintenance frequency corresponding to the product category. According to this structure, the target machine for the next maintenance can be easily determined.

[0014] In the aforementioned machine management system, the machine information includes information related to the rated output of the compressor installed in the machine. The determination conditions include: the rated output of the compressor as information for determining the machine; and a maintenance frequency set based on the rated output of the compressor as information for determining the maintenance time of the machine. The machine list generation unit determines the target machine that is subject to maintenance at a predetermined time from among a plurality of machines based on the rated output of the compressor of the machine and the maintenance frequency set based on the rated output of the compressor. According to the above structure, when the maintenance frequency is set based on the rated output of the compressor, the target machine that is subject to maintenance at a predetermined time can be easily determined.

[0015] In the aforementioned machine management system, the equipment includes refrigeration and air conditioning units. The machine list generation unit determines the target machines for the next maintenance based on the elapsed period since the last maintenance of the refrigeration and air conditioning unit and the maintenance frequency corresponding to the rated output of the compressor. According to this structure, the target machines for the next maintenance can be easily determined.

[0016] In the aforementioned machine management system, the machine list generation unit compares the machine information stored in the machine information storage unit with the determination conditions stored in the condition information storage unit, thereby notifying the target machine identified as the maintenance object and the maintenance content of the target machine. Based on this structure, the terminal receiving the notification can obtain the maintenance content of the target machine without accessing the machine management system, thus confirming the target machine as the maintenance object. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a machine management system.

[0018] Figure 2 This is a diagram of the machine information list of the first embodiment.

[0019] Figure 3 This is a diagram illustrating the maintenance rules of the first embodiment.

[0020] Figure 4 This is a flowchart of the maintenance object determination process in the first embodiment.

[0021] Figure 5 This is a diagram showing a list of the target machines of the first embodiment.

[0022] Figure 6 This is a diagram showing the operation screen for updating the determination conditions according to the first embodiment.

[0023] Figure 7 This is a diagram of the machine information list of the second embodiment.

[0024] Figure 8 This is a diagram illustrating the maintenance rules of the second embodiment.

[0025] Figure 9 This is a flowchart of the maintenance object determination process in the second embodiment.

[0026] Figure 10 This is a diagram showing a list of the target machines of the second embodiment.

[0027] Figure 11 This is a flowchart of the maintenance object determination process in other implementation methods.

[0028] Figure 12 This is a graph showing the relationship between past maintenance time and the execution time of the determination of the object on the timeline in other embodiments. Detailed Implementation

[0029] <First Implementation>

[0030] The machine management system 1 of this embodiment will be described below.

[0031] The machine management system 1 manages multiple devices 2 and identifies the objects to be repaired from among the multiple devices 2.

[0032] like Figure 1 As shown, in one example, the machine management system 1 is connected to a network N. Examples of network N include the Internet, a local area network (LAN), a dedicated line network, a telephone communication network, and networks consisting of two or more of the above. The machine management system 1 manages multiple equipment machines 2 installed on buildings 3 or transport aircraft. The machine management system 1 can be connected to a terminal 4 of the administrator of the building 3 or transport aircraft. Examples of buildings 3 include buildings, shops, factories, schools, facilities, exhibition halls, hotels, inns, convenience stores, supermarkets, restaurants, and underground passages. Examples of transport aircraft include buses, trams, airplanes, ships, rockets, and elevators. The machine management system 1 can also manage the equipment machines 2 installed in multiple buildings 3 uniformly. In this case, it is preferable that the machine management system 1 manages the equipment machines 2 in groups for each building 3. Alternatively, the machine management system 1 can also manage the equipment machines 2 in a way that allows the administrator of the equipment machines 2 to identify them.

[0033] Machine management system 1 may also operate independently of network N. Machine management system 1 manages device 2 based on information input to it. Information is input to machine management system 1 via its input terminals.

[0034] The equipment machine 2 managed by the machine management system 1 is not limited. The equipment machine 2 includes refrigeration and air conditioning machines 2x that use refrigerants. Refrigeration and air conditioning machines 2x include air conditioners, air conditioners installed in trams, turbine refrigerators, screw refrigerators, refrigerators, water chillers, ice makers, beer servers, freezers, refrigerated display cases, refrigerated transport units, refrigerated transport units, gas-fired heat pump air conditioners, and vending machines with refrigeration functions.

[0035] The scope of the inspection is not limited. If the managed equipment 2 is a refrigeration / air conditioning unit 2x, the inspection scope includes refrigerant leaks and phenomena that may cause refrigerant leaks. Possible phenomena that may cause refrigerant leaks include abnormal noises from the machine, rust, damage, dents, and oil stains. The inspection scope may also include checks for component deterioration and malfunctions of the refrigeration / air conditioning unit 2x.

[0036] The refrigerant used in the refrigeration and air conditioning unit 2x is typically a substance with a high greenhouse effect. Therefore, it is desirable to manage refrigerant leaks in the refrigeration and air conditioning unit 2x. In some countries, there is an obligation to perform maintenance on the refrigeration and air conditioning unit 2x regarding refrigerant leaks. Furthermore, regardless of whether an obligation is legally mandated, it is desirable to perform regular maintenance on the refrigeration and air conditioning unit 2x regarding refrigerant leaks. Therefore, in this embodiment, a machine management system 1 that manages the refrigeration and air conditioning unit 2x will be described.

[0037] like Figure 1 As shown, the machine management system 1 includes a machine information storage unit 11, a condition information storage unit 12, and a machine list generation unit 13.

[0038] The machine information storage unit 11 stores machine information 21 related to multiple devices 2. The machine information storage unit 11 may be composed of, for example, a semiconductor memory, DVD, DVD-R, CD, CD-R or hard disk.

[0039] like Figure 2 As shown, the machine information storage unit 11 stores machine information 21 for each device 2. Preferably, the machine information storage unit 11 maintains a machine information list 22. The machine information list 22 includes the machine information 21 for each of the multiple devices 2.

[0040] Machine information 21 includes information related to the product classification of equipment machine 2. In one example, the product classification of equipment machine 2 is determined by law. In this embodiment, the product classification of equipment machine 2 includes a first type of defined product and a second type of defined product. The first type of defined product is a commercial refrigeration and air conditioning unit 2x, excluding air conditioners installed in automobiles, i.e., so-called automotive air conditioners. The second type of defined product is an air conditioner installed in automobiles, i.e., so-called automotive air conditioners. The product classification of equipment machine 2 can also be a classification other than that determined by law. For example, the product classification of equipment machine 2 can also include commercial products and household products. In addition to the aforementioned first and second types of defined products that distinguish the objects to be repaired, the product classification of equipment machine 2 can also include non-defined products indicating that no repair work is required.

[0041] Machine information 21 includes the last maintenance time of equipment machine 2. The last maintenance refers to the latest maintenance performed within the past maintenance period. Machine information 21 includes the machine name and model number. The model number is a unique number for equipment machine 2. The model number is used to identify equipment machine 2. The model number can also be a serial number assigned to each equipment machine 2. Machine information 21 preferably includes information about the location where equipment machine 2 is installed.

[0042] Machine information 21 is created corresponding to device machine 2. When device machine 2 is added, machine information 21 is recreated. When device machine 2 is updated, the content of machine information 21 is updated, and the maintenance history (e.g., maintenance time) is reset. When device machine 2 is removed from the managed object, the machine information 21 of the removed device machine 2 is not removed but remains.

[0043] Specifically, machine information 21 preferably includes update information indicating that equipment machine 2 has been updated and equipment addition / removal information. Examples of updates to equipment machine 2 include updates based on the replacement of equipment machine 2 and repairs of equipment machine 2. The update information includes whether it has been updated, the date and time of the update. The update information preferably includes the product category change history.

[0044] Equipment addition / removal information indicates whether equipment machine 2 was added, removed from the managed objects list, or was initially a managed object. For example, when equipment machine 2 was managed by machine management system 1 from the system's inception, the equipment addition / removal information includes information indicating that equipment machine 2 was initially managed. When equipment machine 2 was added, the equipment addition / removal information includes information indicating that equipment machine 2 was added. As an example, the equipment addition / removal information includes information indicating the addition, along with the date and time of addition. If equipment machine 2 is removed and the number of equipment machines managed by machine management system 1 decreases, the equipment addition / removal information includes information indicating the removal, along with the date and time of removal. After equipment machine 2 is removed, machine management system 1 also manages the machine information 21 of the removed equipment machine 2.

[0045] The condition information storage unit 12 stores the determination conditions used to identify the object to be repaired from multiple devices 2. In one example, the condition information storage unit 12 maintains a condition list including the determination conditions. The condition information storage unit 12 is, for example, composed of a semiconductor memory, an optical disk, or a magnetic disk. The condition information storage unit 12 and the machine information storage unit 11 may also be composed of a single storage medium.

[0046] Figure 3 This is an example of Maintenance Rule 23. Maintenance Rule 23 is, in one instance, established by a national, local public body, or non-governmental organization. Maintenance Rule 23 is a rule by which a national, local public body, or non-governmental organization stipulates the obligation to maintain equipment / machinery 2, or recommends the maintenance of equipment / machinery 2. Figure 3 In the example shown, maintenance rule 23 stipulates that equipment / machine 2 belonging to the first type of defined product must be maintained at least once every three months. The second type of defined product requires zero maintenance per year. That is, the second type of defined product is not a maintenance target. Thus, according to... Figure 3 The maintenance rule 23 shown specifies the maintenance objects and maintenance frequency for each product category.

[0047] The determination conditions are those for determining equipment 2 so that it will meet maintenance rule 23 in the future. The determination conditions include the product category (information used to determine equipment 2) and the maintenance frequency set according to the product category (information used to determine the maintenance time of equipment 2). Here, the "maintenance frequency" in the determination conditions is a concept that includes a period restriction condition for limiting the period from the last maintenance to the next maintenance. The product category included in the determination conditions is equivalent to the product category included in the machine information 21. In this embodiment, the determination conditions are as follows: First, the product category of equipment 2 belongs to the first type of determined machine; second, as a period restriction condition, the elapsed time from the last maintenance time is more than two months and less than three months.

[0048] The machine list generation unit 13 can be configured as a circuit including: 1) one or more processors that execute various processes according to a computer program (software); 2) one or more dedicated hardware circuits, such as application-specific integrated circuits (ASICs), and execute at least a portion of the various processes; or 3) a combination of these. The processor includes a CPU and a memory such as RAM and ROM, storing program code or instructions configured to cause the CPU to execute processes. The memory, i.e., computer-readable medium, includes all available media accessible using a general-purpose or special-purpose computer. The machine list generation unit 13 generates a machine list 24 of target machines for maintenance. The machine list generation unit 13 determines the target machines for maintenance from the equipment machines 2 that are the objects of management by comparing the machine information 21 stored in the machine information storage unit 11 with the determination conditions stored in the condition information storage unit 12. The machine list generation unit 13 generates a machine list 24 of target machines for maintenance.

[0049] The machine list generation unit 13 determines the target machines that will be subject to maintenance at a predetermined time from multiple equipment machines 2 based on product classification and maintenance frequency set according to product classification. Specifically, the machine list generation unit 13 determines the target machines that will be subject to maintenance next time based on the elapsed period since the last maintenance time of the equipment machine 2 and the maintenance frequency corresponding to the product classification.

[0050] Specifically, the machine list generation unit 13 determines the target machines by executing the "maintenance target determination process" shown below. Based on the instructions of the operator using the machine management system 1, the machine list generation unit 13 executes the "maintenance target determination process" on each of the equipment machines 2 that are managed by the machine management system 1.

[0051] Reference Figure 4 The document explains the process of "identifying and handling maintenance targets".

[0052] The machine list generation unit 13 sequentially performs maintenance object determination processing on multiple devices 2 stored in the machine information storage unit 11.

[0053] In step S10, the machine list generation unit 13 determines whether the product category of the equipment machine 2, which is the object of judgment, is a first-type determined product. If the product category of the equipment machine 2, which is the object of judgment, is a first-type determined product, the machine list generation unit 13 executes step S11. If the product category of the equipment machine 2, which is the object of judgment, is not a first-type determined product, the machine list generation unit 13 does not determine the equipment machine 2, which is the object of judgment, as a machine to be repaired.

[0054] In step S11, the machine list generation unit 13 obtains the last maintenance time from the machine information 21 of the device machine 2.

[0055] In step S12, the machine list generation unit 13 calculates the elapsed time from the last maintenance time to the execution of the maintenance object determination process.

[0056] In step S13, the machine list generation unit 13 determines whether the elapsed time calculated in step S12 is more than two months and less than three months. If the elapsed time is more than two months and less than three months, the machine list generation unit 13 executes the contents of step S14. If the elapsed time is less than two months and less than three months, the contents of step S15 are executed. In step S15, the machine list generation unit 13 determines whether the elapsed time calculated in step S12 is more than three months. If the elapsed time is more than three months, the machine list generation unit 13 determines that the device machine 2, which was the object of judgment in step S16, is a missed inspection machine. Furthermore, preferably, as an alarm, the machine list generation unit 13 notifies the user's terminal 4 of information indicating that the device machine 2, which was the object of judgment, is a missed inspection machine. If the elapsed time in the judgment of step S15 is not more than three months, the machine list generation unit 13 does not determine that the device machine 2, which was the object of judgment, is a machine to be repaired.

[0057] In step S14, the machine list generation unit 13 determines the equipment machine 2, which is the object of judgment, as the machine to be repaired. After performing the "repair object determination process", the machine list generation unit 13 creates a machine list 24 indicating the machines to be repaired based on the result of the "repair object determination process".

[0058] Reference Figure 5 Here is an example of machine list 24, which represents the machine to be repaired.

[0059] In machine list 24, the creation date of machine list 24 is shown as the specified time for determining the maintenance targets. The creation date of machine list 24 is equivalent to the execution date of the "Maintenance Target Determination Process".

[0060] As information for equipment machine 2, machine list 24 includes machine name, machine number, product category, last maintenance time, and whether maintenance is required. When equipment machine 2 is identified as a maintenance target, maintenance is "required"; when equipment machine 2 is not identified as a maintenance target, maintenance is "not required".

[0061] exist Figure 5 In the above, machines A1, A2, A3, B1, and B2 are the first type of identified products. Since the time elapsed between the last maintenance date and the execution of the "Maintenance Item Identification Process" is more than two months but less than three months, machine B2 is identified as a maintenance item. Since the time elapsed between the last maintenance date and the execution of the "Maintenance Item Identification Process" for machine C1 is less than one month, machine C1 is not identified as a maintenance item. Since machine D1 is the second type of identified product, machine D1 is not identified as a maintenance item.

[0062] Reference Figure 6 The changes in the conditions for determining the machine to be repaired are explained.

[0063] The criteria for determining the machines to be repaired can change based on improvements in the performance of machine 2, reassessments of the greenhouse effect of refrigerants, the progress of global warming, and public opinion regarding global warming. Therefore, it is preferable that the criteria for determining the machines to be repaired can be easily changed within the machine management system 1. Consequently, the machine list generation unit 13 can also be configured to update the criteria based on change information related to the criteria obtained via interface 30. The change information relates to the maintenance rule 23.

[0064] Figure 6 This is an example of the operation screen 31 of interface 30. Interface 30 is configured as an input terminal connected to machine management system 1. The operation screen 31 includes an input unit 32 for specifying the maintenance frequency. It is configured to input change information related to the determination conditions into the input unit 32. For example, in the case where the maintenance frequency of a first determined product changes from once every three months to once every two months, the "2" for two months is input into the input unit 32 as change information. The machine list generation unit 13 updates the determination conditions based on the change information input into the input unit 32. In the above example, for the period restriction condition in the determination conditions, the machine list generation unit 13 updates it from "the elapsed time since the last maintenance is more than two months and less than three months" to "the elapsed time since the last maintenance is more than one month and less than two months".

[0065] In addition to change information related to maintenance frequency, the change information may also include change information related to the product classification of equipment machine 2. The product classification of equipment machine 2 may change depending on the administrative authority. Therefore, it is preferable that the change information includes change information related to the product classification of equipment machine 2. The change information related to the product classification of equipment machine 2 is changed using the same method as the maintenance frequency. When the product classification of equipment machine 2 is changed, the machine list generation unit 13 changes the maintenance rule 23 (e.g., maintenance object and maintenance frequency) of equipment machine 2 according to the change in product classification. In other examples, when equipment machine 2 is no longer a maintenance object, the change information changes from the first or second defined product to a non-defined product indicating that maintenance is not required. In this way, by changing the change information, the specified equipment machine 2 can be easily removed from the machine list 24.

[0066] The function of this embodiment will be explained.

[0067] The machine list generation unit 13 determines the target machine for maintenance by comparing the machine information 21 stored in the machine information storage unit 11 with the determination conditions stored in the condition information storage unit 12. Thus, since the machine management system 1 determines the target machine for maintenance for multiple equipment machines 2, the user of the machine management system 1 can easily grasp the target machine for maintenance.

[0068] The effects of this implementation method will be explained.

[0069] (1) The machine list generation unit 13 determines the target machine for maintenance by comparing the machine information 21 with the determination conditions stored in the condition information storage unit 12. According to the above structure, compared to checking the past maintenance history of multiple machines 2 individually to determine whether they are the target for maintenance, the target machine 2 can be determined more easily. Furthermore, according to the above structure, compared to the operator determining the target machines one by one, the target machine can be determined more accurately.

[0070] (2) The machine information storage unit 11 is configured as a different device from the condition information storage unit 12.

[0071] According to the above structure, compared with the case where merged information, which is a combination of information processed by machine information storage unit 11 and information processed by condition information storage unit 12, is managed in one storage unit, the overall storage capacity of the two storage units (i.e., machine information storage unit 11 and condition information storage unit 12) managing the information can be smaller.

[0072] For example, to identify the maintenance target from multiple machines 2, a merged database is assumed to be formed, which merges the machine information 21 processed by the machine information storage unit 11 and the condition list processed by the condition information storage unit 12. Specifically, the determination conditions of the condition list are associated with the machine information 21 of each of the multiple machines 2. In this case, the amount of information of the determination conditions of the condition list corresponding to the number of machines 2 is increased on top of the amount of information of the machine information 21 of the multiple machines 2 (hereinafter referred to as additional information). Additional information in... Figure 2 The information content is equivalent to a single column. On the other hand, since the conditions for determining the condition list do not need to be set separately for each machine 2, but are associated with the product category of machine 2 (or the product category and the rated output of the compressor), they can be managed independently with the machine information 21 of multiple machines 2. Furthermore, since the conditions for determining the condition list are rules determined for the product category (or the product category and the rated output of the compressor) of machine 2, the number of conditions is small, and the information content of the conditions for determining the condition list is smaller compared to the additional information content mentioned above. The conditions for determining the condition list have the following characteristics: Figure 3 The information volume is based on the maintenance rules. Therefore, the combined information volume of machine information 21 and condition list can be smaller than the combined database volume described above. Furthermore, in the above structure, since the machine information storage unit 11 storing machine information 21 and the condition information storage unit 12 storing condition list are configured as different devices, the storage capacity of machine information storage unit 11 and condition information storage unit 12 can be reduced compared to the storage capacity of the storage unit storing the combined information as described above.

[0073] (3) Preferably, the machine list generation unit 13 updates the determination conditions based on change information related to the determination conditions obtained via the interface 30. According to the above structure, since the determination conditions in the machine management system 1 can be updated when changes are needed, the maintenance target can be easily determined based on the changed determination conditions. Furthermore, the machine list generation unit 13 can complete the update process simply by updating the determination conditions stored in the condition information storage unit 12, thereby suppressing access to devices other than the condition information storage unit 12 and thus improving the update speed.

[0074] (4) Machine information 21 includes information related to the product classification of equipment machine 2. The determination conditions include the product classification as information used to determine equipment machine 2, and the maintenance frequency set according to the product classification as information used to determine the maintenance time of equipment machine 2. The machine list generation unit 13 determines the target machine that will be subject to maintenance at a specified time from multiple equipment machines 2 based on the product classification and the maintenance frequency set according to the product classification. According to the above structure, when the maintenance frequency is set according to the product classification, the target machine that will be subject to maintenance at a specified time can be easily determined. The specified time represents the time when the user of the machine management system 1 determines the target machine for maintenance from multiple equipment machines 2; the specified time is arbitrarily determined by the user.

[0075] (5) Machine information 21 preferably includes update information and equipment addition / reduction information. According to the above structure, when the equipment machine 2 is updated or added / reduced, the equipment machine 2 to be inspected can be appropriately identified while minimizing the changes in information.

[0076] (6) The machine list generation unit 13 determines the target machine to be inspected next based on the elapsed period since the last maintenance time of the equipment machine 2 and the maintenance frequency corresponding to the product category. According to the above structure, the target machine to be inspected next can be easily determined.

[0077] <Second Implementation Method>

[0078] Reference Figure 1 as well as Figures 7-10 The machine management system 1 of the second embodiment will be described. For structures shared with the first embodiment, the same symbols as in the first embodiment will be used, and repeated descriptions will be omitted.

[0079] In this embodiment, the machine management system 1 manages refrigeration and air conditioning units 2x, which are multiple equipment machines 2, and these multiple equipment machines 2 undergo multiple maintenance checks at different frequencies (see reference). Figure 1 In one example, the machine management system 1 manages the equipment machine group as described below. The equipment machine group includes a refrigeration and air conditioning unit 2x that undergoes only simple maintenance, a refrigeration and air conditioning unit 2x that undergoes both simple maintenance and a first periodic maintenance, and a refrigeration and air conditioning unit 2x that undergoes both simple maintenance and a second periodic maintenance. In this embodiment, the refrigeration and air conditioning unit 2x is an air conditioner.

[0080] Simple inspections are basic checks related to refrigerant leaks, which involve judging refrigerant leaks based on the sound of the refrigeration / air conditioning unit, oil stains, and external damage. The first and second periodic inspections are more sophisticated checks for refrigerant leaks.

[0081] The machine management system 1 includes a machine information storage unit 11, a condition information storage unit 12, and a machine list generation unit 13. The machine information storage unit 11 stores machine information 41 for each refrigeration and air conditioning unit 2x. The machine information storage unit 11 maintains a machine information list 42. The condition information storage unit 12 stores determination conditions used to identify maintenance targets from among the multiple refrigeration and air conditioning units 2x. In one example, the condition information storage unit 12 maintains a condition list including the determination conditions. The machine list generation unit 13 generates a machine list 44 of the machines to be maintained.

[0082] like Figure 7 As shown, machine information 41 includes information related to the product classification of the refrigeration and air conditioning unit 2x. Furthermore, machine information 41 includes information related to the rated output of the compressor installed in the refrigeration and air conditioning unit 2x. The compressor compresses the refrigerant used in the refrigeration and air conditioning unit 2x. The amount of refrigerant charged into the refrigeration and air conditioning unit 2x varies depending on the rated output of the compressor. Machine information 41 may also include information related to the amount of refrigerant, instead of the rated output information of the compressor. Machine information 41 may also include both the rated output of the compressor and information related to the amount of refrigerant. Machine information 41 includes the date of the last simple maintenance, the date of the first scheduled maintenance, and the date of the second scheduled maintenance of the refrigeration and air conditioning unit 2x. In addition, machine information 41 includes the machine name and model number.

[0083] Figure 8 This is an example of maintenance rule 43. In this embodiment, maintenance rule 43 is set according to the type of maintenance. The maintenance rule 43 for simple maintenance is that the refrigeration and air conditioning unit 2x belonging to the first type of defined product shall be maintained at least once every three months. The maintenance rule 43 for first periodic maintenance is that the refrigeration and air conditioning unit 2x belonging to the first type of defined product and whose compressor rated output is 7.5kW or more and less than 50kW shall be maintained at least once every three years. The maintenance rule 43 for second periodic maintenance is that the refrigeration and air conditioning unit 2x belonging to the first type of defined product and whose compressor rated output is 50kW or more shall be maintained once a year.

[0084] The determination conditions are the conditions for ensuring that the refrigeration and air conditioning unit 2x will meet maintenance rule 43 in the future. The determination conditions include the maintenance frequency set based on the compressor's rated output. The determination conditions include the compressor's rated output as information used to determine the refrigeration and air conditioning unit 2x, and the maintenance frequency set based on the compressor's rated output as information used to determine the maintenance time of the refrigeration and air conditioning unit 2x. Here, the "maintenance frequency" in the determination conditions includes the concept of a period restriction condition used to limit the period from the last maintenance to the next maintenance.

[0085] In this embodiment, the conditions for determining simple maintenance are as follows: First, the product category of the refrigeration and air conditioning unit 2x belongs to the first type of determined unit; Second, as a time limit, the elapsed time since the last maintenance time is more than two months and less than three months.

[0086] The conditions for determining the first scheduled maintenance are as follows: First, the product category of the refrigeration and air conditioning unit 2x belongs to the first type of determined unit; second, the rated output of the compressor is between 5kW and 50kW; third, as a period limitation condition, the elapsed time since the last maintenance is more than one year and less than three years.

[0087] The conditions for determining the second periodic maintenance are as follows: First, the product category of the refrigeration and air conditioning unit 2x belongs to the first type of determined unit; second, the rated output of the compressor is above 50kW; third, as a period limitation condition, the elapsed time since the last maintenance is less than one year.

[0088] The machine list generation unit 13 determines the target machine for maintenance at a predetermined time from a plurality of refrigeration and air conditioning units 2x based on the rated output of the compressor and a maintenance frequency set according to the rated output of the compressor. Specifically, the machine list generation unit 13 determines the target machine for the next maintenance based on the elapsed period since the last maintenance time of the refrigeration and air conditioning unit 2x and the maintenance frequency corresponding to the rated output of the compressor. In this embodiment, the machine list generation unit 13 has determination conditions for simple maintenance, determination conditions for first periodic maintenance, and determination conditions for second periodic maintenance.

[0089] The machine list generation unit 13 determines the target machine by performing the "maintenance target determination process" shown in the first embodiment on simple maintenance.

[0090] The machine list generation unit 13 determines the target machines by performing the "maintenance target determination process" as shown below for the first and second periodic maintenance. Based on the instructions of the operator using the machine management system 1, the machine list generation unit 13 performs the "maintenance target determination process" on the refrigeration and air conditioning machines 2X that are managed by the machine management system 1.

[0091] Reference Figure 9 The document explains the process of "identifying and handling maintenance targets".

[0092] The machine list generation unit 13 sequentially performs maintenance object determination processing on multiple refrigeration and air conditioning machines 2x stored in the machine information storage unit 11.

[0093] In step S20, the machine list generation unit 13 determines whether the product category of the refrigeration and air conditioning machine 2x, which is the object of the judgment, is the first type of determined product. If the product category of the refrigeration and air conditioning machine 2x, which is the object of the judgment, is the first type of determined product, the machine list generation unit 13 executes step S21. If the product category of the refrigeration and air conditioning machine 2x, which is the object of the judgment, is not the first type of determined product, the machine list generation unit 13 does not determine the refrigeration and air conditioning machine 2x, which is the object of the judgment, as a machine to be repaired.

[0094] In step S21, the machine list generation unit 13 obtains the date of the last first periodic maintenance and the date of the last second periodic maintenance from the machine information 41 of the refrigeration and air conditioning machine 2x.

[0095] In step S22, the machine list generation unit 13 calculates the first elapsed time from the time of the last first periodic maintenance to the execution time of the maintenance target determination process. Furthermore, the machine list generation unit 13 calculates the second elapsed time from the time of the last second periodic maintenance to the execution time of the maintenance target determination process.

[0096] In step S23, the machine list generation unit 13 determines whether the rated output of the compressor of the refrigeration and air conditioning unit 2x is 7.5kW or higher and lower than 50kW. If the rated output of the compressor is 7.5kW or higher and lower than 50kW, the machine list generation unit 13 executes the contents of step S24. If the rated output of the compressor is not 7.5kW or higher and lower than 50kW, the machine list generation unit 13 executes the contents of step S26.

[0097] In step S24, the machine list generation unit 13 determines whether the first elapsed time calculated in step S22 is more than one year and less than three years. If the first elapsed time is more than one year and less than three years, the machine list generation unit 13 executes the contents of step S25. In step S25, the machine list generation unit 13 determines the refrigeration and air conditioning machine 2x, which is the object of the determination, as the machine to be subject to the first regular maintenance.

[0098] In step S24, when the first elapsed time is more than one year but less than three years, the machine list is updated.

[0099] The generation unit 13 executes the contents of step S31. In step S31, the machine list generation unit 13 determines...

[0100] Check if the first elapsed time calculated in step S22 is more than three years. If the elapsed time is more than three years...

[0101] At this point, the machine list generation unit 13 will select the refrigeration and air conditioning machines that were determined in step S32.

[0102] 2x is identified as a missed detection machine. Furthermore, preferably, in step S32, the machine list is alerted.

[0103] The table generation unit 13 notifies the user's terminal 4 that the refrigeration and air conditioning unit 2x, which is the object of the judgment, is...

[0104] Information about machines that were missed during the detection process. If the time elapsed during the judgment in step S31 is not more than three years, the machine...

[0105] The list generation unit 13 does not identify the refrigeration and air conditioning unit 2x, which is the object of judgment, as the object of maintenance.

[0106] In step S26, the machine list generation unit 13 determines whether the rated output of the compressor of the refrigeration air conditioning unit 2x is 50kW or higher. If the rated output of the compressor is 50kW or higher, the machine list generation unit 13 executes the contents of step S27. If the rated output of the compressor is not 50kW or higher, the machine list generation unit 13 does not determine the refrigeration air conditioning unit 2x, which is the object of the determination, as a machine to be repaired.

[0107] In step S27, the machine list generation unit 13 determines whether the second elapsed time calculated in step S22 is less than one year. If the second elapsed time is less than one year, the machine list generation unit 13 executes the contents of step S28. In step S28, the machine list generation unit 13 determines the refrigeration and air conditioning machine 2x, which is the object of the determination, as the machine subject to the second periodic maintenance.

[0108] In step S27, when the second elapsed time is no less than one year, the machine list generation unit 13 executes the contents of step S29. In step S29, the machine list generation unit 13 determines the refrigeration air conditioner 2x, which is the object of judgment, as a missed inspection machine that has not undergone maintenance for more than one year. Furthermore, preferably, in step S29, as an alarm, the machine list generation unit 13 notifies the user's terminal 4 of the information indicating that the refrigeration air conditioner 2x, which is the object of judgment, is a missed inspection machine.

[0109] After performing the "Maintenance Target Determination Process," the machine list generation unit 13 generates a machine list 44 representing the maintenance targets based on the results of the "Maintenance Target Determination Process." The machine list generation unit 13 then outputs the machine list 44 to the user's terminal 4.

[0110] Reference Figure 10 Here is an example of machine list 44, which represents the machines to be repaired.

[0111] In machine list 44, the creation date of machine list 44 is shown as the specified time for determining the maintenance object. The creation date of machine list 44 is equivalent to the execution date of "Maintenance Object Determination Process". As information for refrigeration and air conditioning machine 2x, machine list 44 includes model name, model number, product category, date of the last simple maintenance, date of the last first periodic maintenance, date of the last second periodic maintenance, whether a simple maintenance is required, whether a first periodic maintenance is required, and whether a second periodic maintenance is required.

[0112] exist Figure 10 In the list, machines A1, A2, and A3 are the first identified products, with a compressor rated output of 7kW. Therefore, machines A1, A2, and A3 are the machines subject to simple maintenance. Furthermore, since the elapsed period from the last simple maintenance date to the execution date of the "Maintenance Target Identification Process" for machines A1, A2, and A3 is more than two months but less than three months, machines A1, A2, and A3 are identified as maintenance targets for simple maintenance, and "Required" is displayed in the Simple Maintenance column of machine list 44.

[0113] Machines B1 and B2 are the first identified products, with a compressor rated output of 20kW. Therefore, machines B1 and B2 are the objects of simple maintenance and the first periodic maintenance. Since the elapsed period from the date of the last simple maintenance to the execution time of "Maintenance Object Identification Processing" for machines B1 and B2 is more than two months but less than three months, machines B1 and B2 are identified as maintenance objects for simple maintenance, and "Required" is displayed in the Simple Maintenance column of machine list 44. Furthermore, since the elapsed period from the date of the last first periodic maintenance to the execution time of "Maintenance Object Identification Processing" for machines B1 and B2 is not more than one year but less than three years, machines B1 and B2 are not identified as maintenance objects, and "Not Required" is displayed in the First Periodic Maintenance column of machine list 44.

[0114] Machine C1 is the first identified product, with a compressor rated output of 100kW. Therefore, Machine C1 is the object of simple maintenance and the second periodic maintenance. Since the elapsed period from the date of the last simple maintenance to the execution time of the "Maintenance Object Identification Process" is neither more than two months nor less than three months, Machine C1 is not identified as an object of simple maintenance, and "Not Required" is displayed in the Simple Maintenance column of Machine List 44. Furthermore, the second elapsed period from the date of the last second periodic maintenance to the execution time of the "Maintenance Object Identification Process" is less than one year, so Machine C1 is identified as a maintenance object, and "Required" is displayed in the Second Periodic Maintenance column of Machine List 44.

[0115] The effects of this implementation method will be explained.

[0116] (1) In this embodiment, machine information 41 includes information related to the rated output of the compressor installed in the refrigeration and air conditioning unit 2x. The determination conditions include the rated output of the compressor as information for determining the refrigeration and air conditioning unit 2x, and the maintenance frequency set based on the rated output of the compressor as information for determining the maintenance time of the refrigeration and air conditioning unit 2x. The machine list generation unit 13 determines the target machine that is subject to maintenance at a predetermined time from among multiple refrigeration and air conditioning units 2x based on the rated output of the compressor of the refrigeration and air conditioning unit 2x and the maintenance frequency set based on the rated output of the compressor. According to the above structure, when the maintenance frequency is set based on the rated output of the compressor, the target machine that is subject to maintenance at a predetermined time can be easily determined.

[0117] (2) The machine list generation unit 13 determines the target machine for the next maintenance based on the elapsed period since the last maintenance of the refrigeration and air conditioning machine 2x and the maintenance frequency corresponding to the rated output of the compressor. According to the above structure, the target machine for the next maintenance can be easily determined.

[0118] (3) The determination condition is to determine the condition of the refrigeration air conditioning machine 2x in such a way that the refrigeration air conditioning machine 2x with a rated output of 50kW or more is inspected once a year. In this case, the machine list generation unit 13 determines the refrigeration air conditioning machine 2x that has a first elapsed period of less than one year and is equipped with a compressor with a rated output of 50kW or more as the target machine.

[0119] Based on the above configuration, and with the rule set as a determining condition that "the maintenance frequency of refrigeration and air conditioning units 2x equipped with compressors with a rated output of 50kW or more is once a year", the target machine to be maintained can be easily identified.

[0120] (4) The determination condition is to ensure that the refrigeration air conditioning unit 2x meets the following rule: the refrigeration air conditioning unit 2x with a compressor rated output of 50kW or more has a maintenance frequency of once a year. In this case, the machine list generation unit 13 determines the refrigeration air conditioning unit 2x with a first maintenance period of more than one year and equipped with a compressor with a rated output of 50kW or more as a missed maintenance machine. According to the above structure, missed maintenance can be suppressed.

[0121] (5) The determination condition is to ensure that the refrigeration air conditioning unit 2x meets the following rule: the refrigeration air conditioning unit 2x equipped with a compressor whose rated output is in the range of 7.5kW or more and less than 50kW has a maintenance frequency of once every three years. In this case, the machine list generation unit 13 determines the refrigeration air conditioning unit 2x that has an elapsed period of more than one year and less than three years and is equipped with a compressor whose rated output is in the range of 7.5kW or more and less than 50kW as the target machine.

[0122] Based on the above structure, under the condition that "the maintenance frequency of refrigeration and air conditioning units 2x equipped with compressors whose rated output is in the range of 7.5kW or more and less than 50kW is once every three years", the target machine to be maintained can be easily identified.

[0123] (6) The determination condition is to ensure that the refrigeration air conditioning unit 2x meets the following rule: the refrigeration air conditioning unit 2x equipped with a compressor whose rated output is in the range of 7.5kW or more and less than 50kW has a maintenance frequency of once every three years. In this case, the machine list generation unit 13 determines the refrigeration air conditioning unit 2x that has been in service for more than three years and is equipped with a compressor whose rated output is in the range of 7.5kW or more and less than 50kW as a missed inspection machine. According to the above structure, missed inspections can be suppressed.

[0124] <Variation Example>

[0125] In addition to the embodiments described above, the machine management system 1 disclosed herein may also be configured as shown in the following variations and as a combination of at least two variations that do not contradict each other.

[0126] In the second embodiment, the maintenance rule 43 for the second periodic maintenance is that refrigeration and air conditioning units 2x belonging to the first type of determined product and whose compressor rated output is 50kW or more shall be maintained once a year. Regarding the determination of whether a unit is subject to the second periodic maintenance, in the second embodiment, as shown in step S27, the machine list generation unit 13 determines whether the second elapsed time for the refrigeration and air conditioning units 2x with a compressor rated output of 50kW or more is less than one year. In this case, even if only one day has passed since the last maintenance, the refrigeration and air conditioning unit 2x is determined to be a machine subject to maintenance. It is preferable to perform the determination as described above when multiple maintenances are recommended per year. On the other hand, from an operational perspective, it is sometimes preferable to have a predetermined period between the last maintenance. In this case, the determination in step S27 can also be changed as follows. That is, in the alternative step S27, the machine list generation unit 13 determines whether the second elapsed time calculated in step S22 is more than six months and less than one year. When the second elapsed time is more than six months and less than one year, the machine list generation unit 13 executes the content of step S28. In the replacement step S27, if the second elapsed time is neither more than six months nor less than one year, it is determined whether the second elapsed time is more than one year. If the second elapsed time is more than one year, step S29 is executed. In the replacement step S27, if the second elapsed time is neither more than six months nor less than one year, it is determined whether the second elapsed time is more than one year. If the second elapsed time is not more than one year (i.e., the second elapsed time is less than six months), the machine list generation unit 13 does not determine the refrigeration and air conditioning machine 2x, which is the object of the judgment, as the machine to be repaired.

[0127] In various embodiments, the machine list generation unit 13 may also include the following functions. Alternatively, the machine list generation unit 13 may compare the machine information 21, 41 stored in the machine information storage unit 11 with the determination conditions stored in the condition information storage unit 12, and notify the terminal connected to the machine management system 1 of the target machine determined to be under maintenance and the maintenance details of the target machine. According to the structure described above, the terminal receiving the notification can obtain the maintenance details of the target machine without accessing the machine management system 1, thereby confirming the target machine as the object of maintenance.

[0128] Specifically, when the machine list generation unit 13 determines that machine 2 is a machine to be repaired, it notifies the terminal associated with machine 2 that machine 2 is a machine to be repaired. The terminal may be, for example, the terminal of the manager who manages machine 2, the terminal of the user who uses machine 2, or the terminal of the staff who maintain machine 2.

[0129] • In each embodiment, the method for determining whether equipment 2 is a maintenance target is not limited to the method shown in the embodiment. Figure 4 or Figure 9 The method is shown below. Other examples are shown below.

[0130] Figure 11 This is a flowchart of other methods for determining and handling maintenance objects during simple maintenance. Figure 12 This is an explanatory diagram illustrating other methods for determining the handling of the maintenance object. It is a diagram showing the relationship between past maintenance time and the execution time of determining the handling of the maintenance object on the timeline.

[0131] Based on the above method, in the machine management system 1, the period for at least one maintenance is set based on the maintenance frequency. For example, when the maintenance rule for simple maintenance is once every three months, three months is defined as one period, and the year is divided into four periods. For example, as... Figure 12 As shown, the first period is from January to March, the second period is from April to June, the third period is from July to September, and the fourth period is from October to December.

[0132] Reference Figure 11 The process for determining the maintenance object in this modified example is explained.

[0133] In step S40, the machine list generation unit 13 determines whether the product category of the equipment machine 2, which is the object of judgment, is the first type of determined product. If the product category of the equipment machine 2, which is the object of judgment, is the first type of determined product, the machine list generation unit 13 executes step S41. If the product category of the equipment machine 2, which is the object of judgment, is not the first type of determined product, the machine list generation unit 13 does not determine the equipment machine 2, which is the object of judgment, as the machine to be repaired.

[0134] In step S41, the machine list generation unit 13 obtains the date of the last simple maintenance from the machine information 21 of the equipment machine 2.

[0135] In step S42, the machine list generation unit 13 determines the period that includes the date of the last simple maintenance.

[0136] In step S43, it is determined whether the execution time of the maintenance object determination process is after the end of the period determined in step S42. If the execution time of the maintenance object determination process is after the end of the period determined in step S42, the machine list generation unit 13 executes the contents of step S44. If the execution time of the maintenance object determination process is at or before the end of the period determined in step S42, the machine list generation unit 13 does not determine the equipment machine 2, which is the object of determination, as the machine to be maintained.

[0137] In step S44, the machine list generation unit 13 determines the equipment machine 2, which is the object of judgment, as the machine to be repaired. According to the structure described above, repair can be performed once within a certain period.

[0138] In the second embodiment described above, an air conditioner was given as an example of a refrigeration and air conditioning unit, and the definition of the air conditioner was explained. Similarly, a refrigeration unit or a refrigerator unit can be given as examples of a refrigeration and air conditioning unit. For the maintenance of refrigeration units or refrigerator units, maintenance rule 43 is also set according to the type of maintenance. The maintenance rule 43 for simple maintenance is the same as in the second embodiment.

[0139] The maintenance rule for the first periodic inspection of a refrigeration or freezer is that, in one example, a refrigeration or air conditioning unit 2x belonging to the first defined product and with a compressor rated output of 7.5kW or more shall be inspected at least once a year.

[0140] In this case, the conditions for determining the refrigeration unit or refrigerator are set so that the refrigeration air conditioning unit 2x meets the maintenance rules described below: the refrigeration air conditioning unit 2x, which is classified as a refrigeration unit or refrigerator and has a compressor rated output of 7.5kW or more, is maintained once a year.

[0141] Specifically, the machine list generation unit 13 determines the refrigeration and air conditioning machine 2x that is the object of judgment as follows. If the object of judgment is a refrigeration and air conditioning machine 2x that is classified as a refrigeration unit or a refrigerator, and the rated output of the compressor of the object of judgment is 7.5 kW or more, and the period of the object of judgment is less than one year, the machine list generation unit 13 determines the refrigeration and air conditioning machine 2x that is equipped with a compressor with a rated output of 7.5 kW or more as the object machine.

[0142] If the object of the inspection is a refrigeration air conditioning unit 2x that is classified as a freezer or refrigerator, and the rated output of the compressor of the object of the inspection is 7.5kW or more, and the inspection period is more than one year, the machine list generation unit 13 will determine the refrigeration air conditioning unit 2x equipped with a compressor with a rated output of 7.5kW or more as a missed inspection machine.

[0143] Based on the above configuration, when a rule is set as a determining condition that "the maintenance frequency of refrigeration and air conditioning units equipped with compressors with a rated output of 7.5kW or more is once a year," the target machines for maintenance can be easily identified. Furthermore, since missed maintenance machines can be identified, missed maintenance can be prevented.

[0144] While in the second embodiment, the machine management system 1 designates the air conditioner among the machines belonging to the refrigeration and air conditioning machine 2x as the managed object, it is also possible to manage air conditioners, refrigeration units, and refrigerators uniformly. The refrigeration and air conditioning machine 2x, belonging to the first defined product, can also be classified into a category including air conditioners and a category including refrigeration units and refrigerators. In this case, it is preferable that, in addition to information related to the product classification of the equipment machine 2, the machine information 21 also includes information related to the classification of the refrigeration and air conditioning machine 2x.

[0145] The embodiments of this device have been described above, but it should be understood that various changes in form and detail can be made without departing from the spirit and scope of the device as set forth in the claims.

Claims

1. A machine management system (1), comprising: Machine information storage unit (11) stores machine information (21, 41) related to multiple equipment machines (2); Condition information storage unit (12) stores determination conditions for determining the maintenance object from the plurality of said equipment machines (2); as well as The machine list generation unit (13) generates a machine list (24, 44) of the target machines to be inspected. Its features are, The machine information (21, 41) includes information related to the product classification of the equipment machine (2) and information related to the rated output of the compressor installed in the equipment machine (2). The determining conditions include: the product classification as information for determining the equipment (2); the maintenance frequency set according to the product classification as information for determining the maintenance time of the equipment (2); the rated output of the compressor as information for determining the equipment (2); and the maintenance frequency set according to the rated output of the compressor as information for determining the maintenance time of the equipment (2). The machine list generation unit (13) compares the machine information (21, 41) stored in the machine information storage unit (11) with the determination conditions stored in the condition information storage unit (12). Furthermore, the machine list generation unit (13) determines the target machine to be repaired from the plurality of equipment machines (2) at a predetermined period determined by the user by making a determination based on the product classification of the machine information (21, 41) and the maintenance frequency set according to the product classification under the determined conditions, and by making a determination based on the rated output of the compressor of the equipment machine (2) and the maintenance frequency set according to the rated output of the compressor.

2. The machine management system as described in claim 1, characterized in that, The machine information storage unit (11) is configured as a different device from the condition information storage unit (12).

3. The machine management system as described in claim 1, characterized in that, The machine list generation unit (13) updates the determination conditions based on change information related to the determination conditions obtained through the interface (30).

4. The machine management system as described in claim 1, characterized in that, The machine list generation unit (13) determines the target machine to be inspected next based on the elapsed period since the last maintenance of the equipment machine (2) and the maintenance frequency corresponding to the product category.

5. The machine management system as described in claim 1, characterized in that, The equipment (2) includes a refrigeration and air conditioning unit (2x). The machine list generation unit (13) determines the target machine to be inspected next based on the elapsed period since the last maintenance of the refrigeration and air conditioning machine (2x) and the maintenance frequency corresponding to the rated output of the compressor.

6. The machine management system as described in any one of claims 1 to 5, characterized in that, The machine list generation unit (13) compares the machine information (21, 41) stored in the machine information storage unit (11) with the determination conditions stored in the condition information storage unit (12) to notify the target machine determined as the maintenance target and the maintenance content of the target machine.

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