JP2013152624A - Diagnostic system and diagnostic method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diagnostic system that performs diagnosis of a diagnostic object device and is capable of performing diagnosis of a facility which is not connected to a network.SOLUTION: A diagnostic system 1 includes a record medium 100, a terminal 200, and a diagnostic device 300. The record medium 100 acquires and stores data from a refrigerator 800 that is a diagnostic object device. The terminal 200 acquires data on the refrigerator 800 from the record medium 100 and transmits them to the diagnostic device 300. The diagnostic device 300 (diagnosis unit 332) performs diagnosis of the refrigerator 800 by using the data acquired from the terminal 200. Thus, the diagnostic system 1 can perform diagnosis of a facility (the refrigerator 800) which is not connected to a network.

Description

  The present invention relates to a diagnostic system and a diagnostic method.

Patent Document 1 discloses a remote monitoring diagnostic system including a maintenance office, a monitoring center, and a technical center. In this remote monitoring / diagnosis system, an on-site monitoring system for collecting plant data from a power plant control device is installed in a maintenance office.
In addition, the monitoring center receives plant data from the field monitoring system via the Internet, and notifies the maintenance engineer of the occurrence of the abnormality of the received power plant. Further, when the monitoring center receives the occurrence of an abnormality from the power plant, the monitoring center transmits the abnormal event that has occurred and plant data related to the abnormal event to the technical center.
The technical center is composed of a plurality of departments, and a technical staff is assigned to each department. The department in charge of the technical center diagnoses the received abnormal events and returns the results of the diagnosis to the maintenance office PC via e-mail.
In patent document 1, it is supposed that the operating rate of a plant can be improved by this remote monitoring diagnostic system.

JP 2002-6942 A

  However, in the remote monitoring and diagnosis system described in Patent Document 1, facilities that are not connected to the monitoring center via the network are not diagnosed. In order to always connect the equipment to be diagnosed to the network, it is necessary to provide security measures and to prepare a customized computer environment so that data can be acquired from the equipment to be diagnosed. And operating costs.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a diagnostic system and a diagnostic method capable of performing a diagnosis on equipment not connected to a network. .

  The present invention has been made to solve the above-described problems, and a diagnostic system according to an aspect of the present invention includes a recording medium storing at least one of operation data and status data of a diagnosis target device; A terminal device capable of connecting a recording medium; and a diagnostic device capable of communicating with the terminal device via a network, wherein the diagnostic device stores device diagnostic data used for diagnosis of the diagnostic target device Based on at least one of the storage unit, the device diagnosis data read from the storage unit, and the operation data or the state data acquired via the network, the diagnosis of the diagnosis target device is performed. A diagnostic unit for performing, and a transmission unit for transmitting a diagnosis result by the diagnostic unit to the terminal device via the network, That.

  The diagnosis system according to one aspect of the present invention is the above-described diagnosis system, wherein the diagnosis unit is based on at least one of the device diagnosis data, the operation data, or the state data. An index indicating a state of the diagnosis target device at a certain time is obtained, and the diagnosis result is generated based on the index.

  The diagnostic system according to an aspect of the present invention is the diagnostic system described above, wherein the diagnostic unit obtains an index indicating a change over time of the state of the diagnostic target device based on the device diagnostic data, and The diagnostic result is generated based on an index.

  The diagnosis system according to an aspect of the present invention is the above-described diagnosis system, wherein the diagnosis unit predicts a state of the diagnosis target device based on the device diagnosis data, and the diagnosis based on the prediction It is characterized by generating a result.

  A diagnostic method according to an aspect of the present invention is a diagnostic method for a diagnostic system including a terminal device connected to a network and a diagnostic device, wherein the terminal device stores operating data or status data of a diagnosis target device. A data transmission step of reading at least one of them from a storage medium and transmitting the data to the diagnosis device via a network; and a device from which the diagnosis device reads device diagnosis data used for diagnosis of the diagnosis target device from a storage unit Based on the diagnostic data acquisition step, the diagnostic device, the device diagnostic data read from the storage unit, and at least one of the operation data or the status data acquired via the network, A diagnosis step for diagnosing the diagnosis target device; and The results, characterized by comprising: a diagnosis result transmitting step of transmitting to the terminal device via the network.

  According to the present invention, it is possible to diagnose a facility that is not connected to a network.

It is a schematic block diagram which shows the function structure of the diagnostic system in one Embodiment of this invention. It is a block diagram which shows schematic structure of the refrigerator which is an example of the diagnostic object apparatus in the embodiment. In the same embodiment, it is explanatory drawing which shows the example of the criteria used when a diagnostic apparatus diagnoses with respect to a refrigerator. FIG. 10 is a sequence diagram illustrating an example of a processing procedure in which the diagnosis system performs diagnosis in the embodiment. In the same embodiment, it is a sequence diagram which shows the example of the process sequence when a terminal device transmits the data of a refrigerator to a diagnostic apparatus separately from a diagnostic request or in addition to a diagnostic request.

Embodiments of the present invention will be described below with reference to the drawings. In the following, a case where the diagnosis target device is a refrigerator will be described, but the diagnosis target device in the present invention is not limited to this. Various devices whose states change can be used as the diagnosis target device in the present invention.
There may be a plurality of devices to be diagnosed. Furthermore, when there are a plurality of devices to be diagnosed, these devices to be diagnosed may be independent from each other, or a plurality of devices such as devices constituting a plant may be one diagnosis object.

FIG. 1 is a schematic block diagram showing a functional configuration of a diagnostic system according to an embodiment of the present invention. In FIG. 1, the diagnostic system 1 includes a recording medium 100, a terminal device 200, and a diagnostic device 300. The diagnostic device 300 includes a communication unit (transmission unit) 310, a storage unit 320, and a processing unit 330. The processing unit 330 includes a data management unit 331 and a diagnosis unit 332.
Further, both the terminal device 200 and the diagnostic device 300 are connected to the network 900. The recording medium 100 can be connected to the terminal device 200.

The network 900 is the Internet, and transmits a communication signal between the terminal device 200 and the diagnostic device 300. However, the network 900 in the present invention is not limited to the Internet. For example, various communication networks such as a LAN (Local Area Network) or a public telephone line can be used as the network 900.
The diagnosis system 1 acquires data from the refrigerator 800 and performs a diagnosis on the refrigerator 800.

  The recording medium 100 is a USB flash memory (Universal Serial Bus Flash Memory). However, the recording medium 100 in the present invention is not limited to the USB flash memory. For example, an SD memory card (Secure Digital Memory Card) or DVD-RW (Digital Versatile Disk Rewritable), such as a refrigerator 800 main body or a control device of the refrigerator 800, or the terminal device 200 is detachably connected (inserted). Various recording media that can be included) can be used as the recording medium 100.

The recording medium 100 stores at least one of operation data and state data of the refrigerator 800. That is, the recording medium 100 is connected to the refrigerator 800 (main body or control device or the like), and stores at least one of operation data and state data of the refrigerator 800.
Here, the operation data is data indicating the content of the operation on the diagnosis target device. For example, valve opening operation data corresponds to the operation data.
The state data is data indicating the state of the diagnosis target device. For example, actual measurement data such as a valve opening measurement value corresponds to the state data.

The terminal device 200 is a device that can be connected to the recording medium 100 and can communicate with the diagnostic device 300 via the network 900, and functions as a terminal device of the diagnostic device 300. The terminal device 200 may be a PC (Personal Computer), for example, but is not limited thereto.
Further, the number of terminal devices 200 is not limited to one shown in FIG. For example, the diagnosis system 1 may use a plurality of devices as diagnosis target devices, and the terminal device 200 may be provided for each diagnosis target device.

  The diagnostic device 300 is a device that can communicate with the terminal device via a network, and provides diagnostic information of the refrigerator 800 as a server device for the terminal device 200. The diagnostic apparatus 300 may be, for example, a PC or a mainframe (large frame general-purpose machine), but is not limited thereto.

  The communication unit 310 is connected to the network 900 and communicates with the terminal device 200 via the network 900. In particular, the communication unit 310 receives from the terminal device 200 at least one of operation data and state data, and a diagnosis request. Further, the communication unit 310 transmits the diagnosis result from the diagnosis unit 332 to the terminal device 200.

The storage unit 320 is realized by using a storage device such as a hard disk or a semiconductor memory, and stores various data. In particular, the storage unit 320 stores device diagnosis data used for diagnosis of the refrigerator 800.
Here, the device diagnosis data may be various data used for diagnosis of the refrigerator 800. For example, the device diagnosis data may include data indicating a history of at least one of operation data and state data. In addition, the device diagnosis data may include data indicating a determination criterion described later.

The processing unit 330 is realized by, for example, a CPU (Central Processing Unit) included in the diagnostic apparatus 300 reading and executing a program from a storage device (for example, the storage unit 320) included in the diagnostic apparatus 300, Various parts of the diagnostic apparatus 300 are controlled to provide various services.
The data management unit 331 inputs and outputs (writes and reads) data to and from the storage unit 320.

The diagnosis unit 332 diagnoses the refrigerator 800 based on the device diagnosis data read from the storage unit 320 and at least one of operation data or state data acquired via the network 900. More specifically, the diagnosis unit 332 obtains an index indicating the state of the refrigerator 800 at a certain time point based on at least one of the device diagnosis data or the operation data or the state data, and A diagnostic result is generated based on the index.
Here, the index indicating the state of the refrigerator 800 may be, for example, a measured value such as a valve opening, or a value calculated from a plurality of measured values such as a coefficient of performance (COP). Also good.

Moreover, the diagnosis part 332 calculates | requires the parameter | index which shows the time-dependent change of the state of the refrigerator 800 based on apparatus diagnostic data, and produces | generates a diagnostic result based on the said parameter | index.
Here, the index indicating the change over time in the state of the refrigerator 800 may be, for example, a history of measured values such as a valve opening, or may be calculated from a plurality of measured values such as a coefficient of performance (COP). It may be a history of values to be processed.

  The diagnosis unit 332 predicts the state of the refrigerator 800 based on the device diagnosis data, and generates a diagnosis result based on the prediction. For example, the diagnosis unit 332 predicts the state of the refrigerator 800 based on the operation history of the refrigerator 800, such as determining the remaining life from the operation time of the compressor and generating a diagnosis result including advice on the maintenance time. Generate diagnostic results.

  FIG. 2 is a configuration diagram illustrating a schematic configuration example of a refrigerator 800 that is an example of a diagnosis target device. In the figure, the refrigerator 800 includes a first stage compressor 810, a second stage compressor 820, a condenser 830, a high stage expansion valve 840, an intercooler 850, a low stage expansion valve 860, An evaporator 870 and a hot gas bypass (HGBP) valve 880 are provided. The first stage compressor 810 includes a first stage vane (first stage inlet guide vane) 811. The second stage compressor 820 includes a second stage vane (second stage inlet guide vane) 821.

The refrigerator 800 cools the refrigerant in a refrigeration cycle with two-stage compression and two-stage expansion, and cools cold water with the cooled refrigerant.
Each of the first stage compressor 810 and the second stage compressor 820 is a centrifugal compressor, and compresses a gas refrigerant (a refrigerant in a gaseous state). The first stage compressor 810 compresses the gas refrigerant from the evaporator 870 and sends it to the second stage compressor 820. Here, the first stage vane 811 adjusts the inlet flow rate of the gas refrigerant to the first stage compressor 810.

Second stage compressor 820 compresses the gas refrigerant from first stage compressor 810 together with the gas refrigerant from intermediate cooler 850 and sends the compressed refrigerant to condenser 830. Here, the second stage vane 821 adjusts the inlet flow rate of the gas refrigerant to the second stage compressor 820.
The first stage vane 811 and the second stage vane 821 can control the capacity of the refrigerator 800 by adjusting the gas refrigerant flow rate.

  The condenser 830 condenses and liquefies the high-temperature and high-pressure gas refrigerant compressed by the turbo compressor 911. More specifically, a cooling heat transfer tube is inserted into the condenser 830, and the refrigerant is cooled and liquefied by cooling water flowing in the tube. The cooling water flowing through the cooling heat transfer tubes cools the refrigerant, then is exhausted to the outside in the cooling tower, and flows again through the cooling heat transfer tubes.

The high stage expansion valve 840 and the low stage expansion valve 860 expand the liquid refrigerant (liquid refrigerant) from the condenser 830.
The intermediate cooler 850 cools the liquid refrigerant expanded in the high stage expansion valve 840. More specifically, a part of the liquid refrigerant is vaporized in the intermediate cooler 850, and the remaining liquid refrigerant is cooled by absorbing the heat of vaporization. The refrigerant (gas refrigerant) vaporized in the intercooler 850 flows into the second stage vane 821 together with the gas refrigerant from the first stage vane 811. On the other hand, the liquid refrigerant cooled by the intermediate cooler 850 flows into the low stage expansion valve 860 and is expanded, and then flows into the evaporator 870.

The evaporator 870 evaporates the liquid refrigerant from the low stage expansion valve 860. Here, a cold water heat transfer tube is inserted into the evaporator 870, and the cold water flowing through the tube is cooled by absorbing the heat of vaporization when the refrigerant evaporates.
In this way, the refrigerator 800 cools the cold water.

  Further, a bypass pipe is provided between the gas phase part of the condenser 830 and the gas phase part of the evaporator 870, and the gas refrigerant is bypassed. The hot gas bypass valve 880 is provided in the bypass pipe, and adjusts the flow rate of the gas refrigerant flowing in the bypass pipe (hot gas bypass flow rate). When the hot gas bypass valve 880 adjusts the hot gas bypass flow rate, more detailed capacity control than capacity control by the first stage vane 811 and the second stage vane 821 can be performed.

Next, an example of diagnosis performed by the diagnosis apparatus 300 will be described with reference to FIG.
FIG. 3 is an explanatory diagram illustrating an example of a determination criterion used when the diagnosis apparatus 300 performs a diagnosis on the refrigerator 800. As shown in the figure, the storage unit 320 includes a phenomenon that occurs in the refrigerator 800, a factor that causes the phenomenon (failure factor), and a type of determination item (whether the diagnosis device 300 performs automatic determination or a determination criterion Is stored in advance (before the diagnosis apparatus 300 performs a diagnosis) in association with the determination criterion.

Here, the storage unit 320 determines whether a phenomenon that is a target of alarm such as “evaporator pressure drop (trip)” or a phenomenon that is not necessarily a target of alarm such as “no rated capacity”. Also stores the criterion.
Note that when the diagnosis system 1 uses a plurality of types of devices as devices to be diagnosed, the storage unit 320 stores determination criteria for each type of device. For example, when the diagnosis system 1 uses a refrigerator and a gas turbine as diagnosis target devices, the storage unit 320 stores a criterion in advance for each of the refrigerator and the gas turbine. Alternatively, when the diagnostic system 1 uses refrigerators with different types as diagnosis target devices, the storage unit 320 stores a determination criterion in advance for each type of refrigerator.

The diagnosis unit 332 makes a diagnosis for the refrigerator 800 based on this determination criterion.
For example, when the refrigerator 800 trips due to a decrease in the evaporator pressure and the communication unit 310 receives a diagnosis request, the diagnosis unit 332 reads the phenomenon from the diagnosis request, and according to the read phenomenon, the “evaporator pressure decrease ( Each determination criterion associated with “freezer trip)” is read out together with the factor and type.

  Then, the diagnosis unit 332 sequentially determines whether the type is “determination” among the read determination criteria, which is good (satisfy the determination criteria) or not (does not satisfy the determination criteria). Specifically, the diagnosis unit 332 first, from the status data included in the diagnosis request received by the communication unit 310 or from the device diagnosis data stored in the storage unit 320 based on the determination criterion shown in the row L11. The steam saturation temperature and the chilled water outlet temperature at a certain point before the trip are read out, and it is determined whether or not the difference between the steam saturation temperature and the chilled water outlet temperature is equal to or less than the threshold temperature difference. That is, if the amount of the refrigerant is insufficient, it is considered that the heat exchange between the refrigerant and the cold water is not sufficiently performed in the evaporator, so that the difference between the steam saturation temperature and the cold water outlet temperature is widened, and the diagnosis unit 332 opens the temperature difference. The presence or absence of is determined.

  When it is determined that the temperature difference is larger than the threshold temperature difference, the diagnosis unit 332 provides advice including that the refrigerant amount is considered to be a cause, a determination criterion, and the steam saturation temperature and the chilled water outlet temperature used for the determination. It is generated and transmitted to the terminal device 200 via the communication unit 310 and the network 900.

Note that the diagnosis unit 332 may transmit maintenance service information for eliminating the cause to the terminal device 200 in addition to the advice. When the diagnosis unit 332 transmits the maintenance service status, an administrator of the refrigerator 800 (for example, a maintenance worker or an operator of the refrigerator 800) can receive the maintenance service more quickly and resume operation. it can. In addition, a maintenance service provider can acquire a new job.
The maintenance service information is stored in advance by the storage unit 320 in association with factors, for example.

  On the other hand, when it is determined that the difference between the steam saturation temperature and the chilled water outlet temperature is equal to or less than the threshold temperature difference, the diagnosis unit 332 is included in the diagnosis request received by the communication unit 310 based on the determination criterion shown in the row L21. From the state data to be stored or from the device diagnosis data stored in the storage unit 320, the liquid level of the intermediate cooler 850 at a certain point before the trip is read, and whether or not the liquid level is within the threshold range from the set value. judge. That is, if the high-stage expansion valve 840 and the low-stage expansion valve 860 are too closed, the pressure in the evaporator 870 may decrease, and the diagnosis unit 332 determines the control status of these expansion valves based on the liquid in the intermediate cooler 850. Judge by level.

  When it is determined that the liquid level is out of the threshold range, the diagnosis unit 332 generates an advice including that the expansion valve control is considered to be a cause, a determination criterion, and the liquid level used for the determination, and performs communication. The data is transmitted to the terminal device 200 via the unit 310 and the network 900.

As described above, the diagnosis unit 332 sequentially determines the determination criteria whose type is “determination”, and when a determination criterion that is not satisfied is detected, the diagnosis unit 332 generates advice based on the determination criterion.
On the other hand, when it is determined that all of the determination criteria corresponding to the phenomenon of the diagnosis request satisfy the type of “determination”, the diagnosis unit 332 determines that the type of the determination criterion corresponding to the phenomenon is “ An advice is generated based on what is “advice” and transmitted to the terminal device 200 via the communication unit 310 and the network 900. For example, the diagnosis unit 332 confirms whether or not the refrigerant liquid level is visible from the evaporator side glass at the rated load, and a comment that recommends whether or not the refrigerant amount is insufficient is shown in line L12. Include in advice based on criteria. In addition, the diagnosis unit 332 confirms whether or not the refrigerant liquid level is visible from the evaporator side glass at the rated load, and whether or not some bubbles are visible from the condenser liquid reservoir sight glass, and the expansion valve control is poor. Comments that are recommended to determine the presence or absence of are included in the advice based on the determination criteria shown in rows L22 and L23.
When the diagnosis unit 332 transmits the advice that suggests the factor and the determination criterion in this manner, the manager of the refrigerator 800 can detect the factor more quickly and restart the operation.

Next, the operation of the diagnostic system 1 will be described with reference to FIGS. 4 and 5.
FIG. 4 is a sequence diagram illustrating an example of a processing procedure in which the diagnosis system 1 performs a diagnosis. In the process shown in the figure, the recording medium 100 acquires and stores (stores) at least one of operation data and status data of the refrigerator 800 from the refrigerator 800 (sequence S101).
For example, the recording medium 100 is connected to the USB port of the control device of the refrigerator 800 by the administrator of the refrigerator 800. Then, the control device of the refrigerator 800 writes the operation data and state data of the refrigerator 800 in the recording medium 100 in accordance with the operation of the administrator of the refrigerator 800.

  Here, the operation data and state data written to the refrigerator 800 by the control device of the refrigerator 800 may be instantaneous data (for example, data obtained by one sampling), or history data at a certain time (for example, , Each data obtained by sampling a plurality of times). For example, the control device of the refrigerator 800 includes a recording device, and periodically stores the operation data and state data of the refrigerator 800 (writes in the recording device). According to the operation, the data stored periodically is written into the recording medium 100.

Next, the recording medium 100 outputs the data stored in sequence S101 (at least one of operation data or status data of the refrigerator 800) to the terminal device 200 (sequence S102).
For example, the recording medium 100 is connected to the USB port of the terminal device 200 by the administrator of the refrigerator 800. The terminal device 200 reads out the operation data and status data of the refrigerator 800 from the recording medium 100 according to the operation of the administrator of the refrigerator 800, and stores it in a storage device (for example, an internal hard disk device) provided in the terminal device 200 itself. It can also be stored.
Further, it can be used as a storage device of the terminal device 200.

  Next, the terminal device 200 transmits a diagnosis request including at least one of the operation data and the state data of the refrigerator 800 acquired in the sequence S102 to the diagnosis device 300 via the network 900, and the communication unit 310 Receives the diagnosis request and outputs it to the data management unit 331 and the diagnosis unit 332 (sequence S103).

  For example, the terminal device 200 reads out the format of the diagnosis request stored in advance according to the operation of the administrator of the refrigerator 800, and inserts the operation data and status data of the refrigerator 800 acquired in the sequence S102 into the format. Generate a diagnostic request. Then, the terminal device 200 transmits a diagnosis request in accordance with the operation of the administrator of the refrigerator 800.

Next, the data management unit 331 stores at least one of the operation data and the state data acquired from the communication unit 310 in the sequence S103 in the storage unit 320 as a part of the device diagnosis data (sequence S104).
Further, the data management unit 331 reads out the device diagnosis data stored in the storage unit 320 and outputs the device diagnosis data to the diagnosis unit 332 (sequence S105). For example, the data management unit 331 reads, as device diagnosis data, device operation data, history of operation data and status data of a device that has received a diagnosis request, and determination criteria applicable to the device.

  Next, the diagnosis unit 332 performs diagnosis of the refrigerator 800 based on the diagnosis request acquired from the communication unit 310 in sequence S103 and the device diagnosis data acquired from the data management unit 331 in sequence S105.

Here, the diagnosis performed by the diagnosis unit 332 can be various.
For example, the diagnosis unit 332 generates a diagnosis result including advice for solving the failure in addition to the cause of the failure, so that the manager of the refrigerator 800 refers to the advice, and can quickly and reliably troubleshoot the failure. It can be resolved.

  In addition, a level may be provided for the service provided by the diagnostic apparatus 300. For example, the administrator of the refrigerator 800 can receive a service without a prior contract (at a spot), but can also contract in advance. Then, the diagnostic apparatus 300 provides a service corresponding to the contract content.

For this purpose, for example, the recording medium 100 stores in advance identification information of the refrigerator 800 (for example, a machine number such as a manufacturing number of the refrigerator 800). Then, in a state where the recording medium 100 is connected to the USB port of the terminal device 200, the diagnostic device 300 (for example, the diagnostic unit 332) performs authentication using the identification information.
When the authentication apparatus 300 is successfully authenticated, the diagnosis apparatus 300 reads out service contract information managed for each diagnosis target device or for each customer, and provides a service corresponding to the contract.
In addition, when the diagnosis apparatus 300 performs authentication using the machine number of the refrigerator 800, the refrigerator 800 is a service provision target device (for example, whether or not it is a device manufactured by the manufacturer that provides the diagnosis service). Can be determined.

Further, the diagnosis apparatus 300 provides service description or constraint information provided in the current contract status and service contract upgrade information (for example, information on service contents and contract amount provided in each level of contract). You may make it do.
Further, the diagnosis device 300 may issue a user ID and perform authentication using the user ID. Furthermore, the diagnostic device 300 acquires user information (customer information) and device information (diagnosis target device information) when the contract is concluded, and associates the user information with the user ID. Alternatively, device information, and further history information of the diagnosis target device may be stored and managed.

The diagnosis apparatus 300 can provide more appropriate service and a wider range of services by storing user information, device information, and history information.
For example, when diagnosing the refrigerator 800, it is conceivable that the way of diagnosis differs depending on the configuration of the device. Therefore, the diagnosis device 300 (storage unit 320) stores device configuration information of the refrigerator 800 as device information, so that more accurate diagnosis can be performed.

  Further, the diagnosis unit 332 may obtain an index indicating the state of the refrigerator 800 at a certain time point and perform a diagnosis based on the index. For example, the diagnosis unit 332 includes the equipment plan COP (calculation COP) of the refrigerator 800 based on the refrigeration cycle calculation, the refrigeration based on the data obtained from the terminal device 200 and the data read from the storage unit 320. The actual COP (actual COP) obtained from the actually measured value in the machine 800 is obtained. If there is a difference greater than or equal to a predetermined threshold between the calculated COP and the actual COP, the diagnosis unit 332 generates a diagnosis result indicating that adjustment is necessary, and the terminal via the communication unit 310 and the network 900 To device 200.

The storage unit 320 stores past history data of the refrigerator 800 (for example, part of the device diagnosis data), and the diagnosis unit 332 refers to the history data to bring the actual COP closer to the calculated COP. Operation advice (vane opening change, expansion valve opening change, etc.) may be included in the diagnosis result. For example, the diagnosis unit 332 includes the past calculation COP and actual COP and the operation data at that time in the diagnosis result and causes the terminal device 200 to display them.
Thereby, the administrator of the refrigerator 800 can operate the refrigerator 800 more efficiently with reference to the diagnosis result.
Further, the diagnosis unit 332 may transmit the obtained calculation COP or actual COP to the terminal device 200 for display. Thereby, the manager of refrigerator 800 can grasp the situation of refrigerator 800 more certainly.

Further, the diagnosis unit 332 may exclude data on operating conditions inappropriate for diagnosis from the diagnosis target. For example, data in a state where the refrigerator 800 is in a transitional state such as during start-up is not suitable for diagnosis that should be performed in a somewhat stable state, such as evaluation of the operation efficiency of the refrigerator 800. Therefore, the diagnosis unit 332 performs diagnosis by excluding such time zone data.
Thereby, the diagnosis part 332 can perform a diagnosis more correctly.

  Further, the diagnosis unit 332 may obtain an index indicating a change in the state of the refrigerator 800 over time, and make a diagnosis based on the index. For example, when the diagnosis unit 332 detects that the difference between the actual measurement value or the calculated value in the refrigerator 800 and the target value is gradually increased, advice according to the detected change (for example, aging deterioration is suspected). Information) is included in the diagnostic results.

  In addition, when the same event has repeatedly occurred and no maintenance has been performed, the diagnosis unit 332 contacts a service person associated with the machine or a service person at a regional service shop (for example, mail transfer). May be performed. The service person can provide maintenance in accordance with such communication, and can lead to improvement of customer satisfaction (CS).

  In addition, the diagnosis unit 332 detects a trend of a change in the state of the refrigerator 800 (for example, an increase in a difference between an actual measurement value or a calculated value and a target value thereof), so that a continuous change that appears as a trend, Distinctive change. As a result, the diagnosis unit 332 can take a more appropriate action such as issuing a warning for a continuous change and watching the situation for a temporary change.

  Further, the diagnosis device 300 (diagnosis unit 332) may predict the state of the refrigerator 800 based on the device diagnosis data, and make a diagnosis based on the prediction. For example, the diagnosis unit 332 compares the state data of the refrigerator 800 obtained from the terminal device 200 with the history data read from the storage unit 320 (for example, a part of the device diagnosis data), and performs future operations. Predict trends in performance decline and announce next parts replacement timing. Further, the diagnosis unit 332 calculates and presents the current running cost, the running cost when a future performance decrease is assumed, and the running cost when a part is replaced (displayed on the terminal device 200 in the diagnosis result). You may do it.

  Thus, the diagnosis unit 332 announces the component replacement timing, so that the administrator of the refrigerator 800 can perform component replacement at an appropriate timing. In addition, a customer (for example, an administrator of the refrigerator 800) or a manufacturer of the refrigerator 800 can assume the timing of parts replacement in advance, and it is easy to make a construction (maintenance) plan.

In addition, the diagnosis unit 332 may present a case where the cost has been significantly improved by component replacement (for example, in another diagnosis target device).
In addition, the storage unit 320 may store the operation time information as history data (a part of the device diagnosis data), and the diagnosis unit 332 may make a diagnosis based on the operation time information. For example, the diagnosis unit 332 calculates the remaining life based on the operation time of the bearing, and advises the timing of maintenance based on the obtained remaining life.

  Further, depending on the contract conditions (for example, when the contract grade is high), when detecting that the recording medium 100 is connected to the USB port of the terminal device 200, the diagnosis unit 332 automatically performs the energy saving diagnosis. May be. On the other hand, if the contract conditions are low, it may be inquired whether or not to upgrade the contract.

After step S106, the diagnosis unit 332 outputs the diagnosis result to the communication unit 310, and the communication unit 310 transmits the diagnosis result to the terminal device 200 via the network 900 (sequence S107).
Then, the terminal device 200 displays the diagnosis result (sequence S108). The administrator of the refrigerator 800 can take a more appropriate action with reference to the diagnosis result.
Thereafter, the process of FIG.

Note that the terminal device 200 may transmit at least one of operation data or status data of the refrigerator 800 to the diagnostic device 300 separately from or in addition to the diagnostic request.
FIG. 5 shows an example of a processing procedure when the terminal device 200 transmits at least one of the operation data or the state data of the refrigerator 800 to the diagnostic device 300 separately from or in addition to the diagnostic request. FIG. For example, the administrator of the refrigerator 800 concludes a diagnosis service contract with the operator of the diagnosis apparatus 300 in advance, and the data of the refrigerator 800 is stored in advance (before making a diagnosis request) according to the diagnosis service contract. Send to 300.

In FIG. 5, sequences S201 and S202 are the same as sequences S101 and S102 of FIG. However, the processes in sequences S201 and S202 are performed at a timing other than the time of the diagnosis request.
After the sequence S202, the terminal device 200 transmits a registration request including at least one of the operation data and the state data of the refrigerator 800 acquired in the sequence S202 to the diagnosis device 300 via the network 900, and performs communication. Unit 310 receives the registration request and outputs the registration request to data management unit 331 (sequence S203).

  For example, the terminal device 200 reads the registration request format stored in advance according to the operation of the administrator of the refrigerator 800, and inserts the operation data and status data of the refrigerator 800 acquired in the sequence S202 into the format. Generate a registration request. Then, the terminal device 200 transmits a registration request in accordance with the operation of the administrator of the refrigerator 800.

Next, the data management unit 331 stores at least one of the operation data and the state data acquired from the communication unit 310 in the sequence S203 in the storage unit 320 as a part of the device diagnosis data (sequence S204). Thereby, the memory | storage part 320 memorize | stores the said data as a part of apparatus diagnostic data.
Thereafter, the process of FIG.

As described above, the terminal device 200 acquires at least one of the operation data and the state data of the diagnosis target device (the refrigerator 800 in the present embodiment) from the recording medium 100 and transmits it to the diagnosis device 300. Then, the diagnosis device 300 (diagnosis unit 332) diagnoses the refrigerator 800 using data acquired from the terminal device 200.
Therefore, the diagnosis system 1 can make a diagnosis for equipment that is not connected to the network 900 (the refrigerator 800 in this embodiment).

In addition, the terminal device 200 transmits data to the diagnosis device 300 via the network 900, so that the diagnosis device 300 can provide troubleshooting support for the refrigerator 800 located at a remote location. Therefore, for example, the administrator of the refrigerator 800 can receive troubleshooting support from the manufacturer of the refrigerator 800 from a remote location.
Thus, it is not necessary to prepare a computer environment for connecting the refrigerator 800 to the network 900, and the installation cost and operation cost of the computer environment can be reduced.

  Moreover, since the diagnostic apparatus 300 (diagnosis part 332) performs automatic diagnosis using the data of the refrigerator 800, a human load does not arise at the time of diagnosis.

The diagnosis unit 332 obtains an index indicating the state of the refrigerator 800 at a certain time point based on at least one of the device diagnosis data, the operation data, or the state data, and performs the diagnosis based on the index. Generate results.
The diagnosis unit 332 appropriately reflects the failure factor and the countermeasure by generating a diagnosis result based on an index indicating the state of the refrigerator 800 when the failure occurs or when the refrigerator 800 is operating before the failure occurs. The diagnostic result can be generated. Therefore, the administrator of the refrigerator 800 can resolve the failure more quickly with reference to the diagnosis result.

Moreover, the diagnosis part 332 calculates | requires the parameter | index which shows the time-dependent change of the state of the refrigerator 800 based on apparatus diagnostic data, and produces | generates a diagnostic result based on the said parameter | index.
The diagnosis unit 332 generates a diagnosis result based on an index indicating a change in the state of the refrigerator 800 over time, for example, an actual value (for example, an actual machine COP) in the refrigerator 800 is a target value (for example, a COP planned value). It is possible to detect a tendency of a change in the state of the refrigerator 800, such as being deviating from the above, and generate a diagnosis result corresponding to the tendency. Therefore, the administrator of the refrigerator 800 can take measures before the tendency of the detected state change reaches the degree of failure with reference to the diagnosis result.

  The diagnosis unit 332 predicts the state of the refrigerator 800 based on the device diagnosis data, and generates a diagnosis result based on the prediction. Therefore, the administrator of the refrigerator 800 can avoid a predicted failure by referring to the diagnosis result.

A program for realizing all or part of the functions of the terminal device 200 and the diagnostic device 300 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. By doing so, you may process each part. Here, the “computer system” includes an OS and hardware such as peripheral devices.
Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Diagnosis system 100 Recording medium 200 Terminal device 300 Diagnosis device 310 Communication part 320 Storage part 330 Processing part 331 Data management part 332 Diagnosis part 800 Refrigerator 900 Network

Claims (5)

A recording medium storing at least one of operation data and status data of the diagnosis target device; and
A terminal device to which the recording medium can be connected;
A diagnostic device capable of communicating with the terminal device via a network;
Comprising
The diagnostic device comprises:
A storage unit for storing device diagnosis data used for diagnosis of the diagnosis target device;
A diagnosis unit for diagnosing the diagnosis target device based on the device diagnosis data read from the storage unit and at least one of the operation data or the state data acquired via the network; ,
A transmission unit that transmits a diagnosis result by the diagnosis unit to the terminal device via the network;
A diagnostic system comprising:   The diagnosis unit obtains an index indicating a state of the diagnosis target device at a certain time point based on at least one of the device diagnosis data, the operation data, or the state data, and based on the indicator The diagnostic system according to claim 1, wherein the diagnostic result is generated.   2. The diagnosis unit according to claim 1, wherein the diagnosis unit obtains an index indicating a change with time of the state of the diagnosis target device based on the device diagnosis data, and generates the diagnosis result based on the index. Item 3. The diagnostic system according to Item 2.   4. The diagnosis unit according to claim 1, wherein the diagnosis unit predicts a state of the diagnosis target device based on the device diagnosis data, and generates the diagnosis result based on the prediction. 5. The diagnostic system described. A diagnostic method for a diagnostic system comprising a terminal device and a diagnostic device connected to a network,
A data transmission step in which the terminal device reads at least one of operation data or status data of a diagnosis target device from a storage medium and transmits the data to the diagnosis device via a network;
The diagnostic device, device diagnostic data acquisition step for reading out device diagnostic data to be used for diagnosis of the diagnostic target device from a storage unit;
The diagnosis device diagnoses the diagnosis target device based on the device diagnosis data read from the storage unit and at least one of the operation data and the state data acquired via the network. Diagnostic steps to perform,
A diagnostic result transmitting step in which the diagnostic device transmits a diagnostic result in the diagnostic step to the terminal device via the network;
A diagnostic method comprising:

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