JP3025819B2 - Failure diagnosis system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosis system for performing a failure diagnosis of equipment in combination with a central monitoring system that monitors and controls the operation of equipment in a building.

[Conventional technology]

In order for the building to survive without losing its function and value, appropriate maintenance activities, including daily management, renewal and renovation, are required.

With the progress of intelligent technology and the increasing weight of equipment systems, maintenance activities for equipment systems have become even more important.

[Problems to be solved by the invention]

However, automation in this field has not advanced, and at present it requires skilled maintenance personnel.

An object of the present invention is to solve the above-described problems, and to provide a failure diagnosis system that enables an inexperienced maintenance person to perform maintenance activities at the level of a skilled maintenance person or more for an equipment system. It is. Another object of the invention is to provide
The purpose is to enable a diagnosis equivalent to an advanced diagnosis by a specialist.

[Means for solving the problem]

For this purpose, the present invention is a failure diagnosis system that performs a failure diagnosis of each facility when a failure occurs in the environment in the building in combination with a central monitoring system that monitors and controls the operation of each facility in the building. An input unit for inputting information for diagnosis of a failure occurrence item, a location, and other information; and the central monitoring system for operating status data of each facility input from the input unit according to the failure occurrence item and the location. The primary diagnostic means for determining the alarm state of each device based on the operating status data and identifying the faulty area by comparing the areas based on the operation status data, and specifying the target device for the failure diagnosis, and the primary diagnostic means input from the input means. Diagnostic data including measurement data and set value data is obtained from the central monitoring system or the input means in accordance with the item and the location of the occurrence of the failure, and based on the diagnostic data. Secondary diagnostic means for identifying the faulty equipment and the cause of the failure, the diagnosis of the primary diagnostic means based on the operation status data of each of the equipment, the determination of the alarm state of each equipment and the comparison of the failure area by the comparison between areas A failure device or a cause of the failure is specified by the diagnosis of the secondary diagnosis unit based on the diagnostic data on condition that the identification has not been performed.

[Action]

In the failure diagnosis system according to the present invention, input means for inputting information for diagnosis of an occurrence item and a location of a failure in the environment in the building and information on the occurrence item and the failure location of the failure input from the input means. The primary operation is to acquire the operation status data of each facility from the central monitoring system, determine the alarm status of each device, specify the faulty area by comparing areas, and specify the target device for the fault diagnosis based on the operation status data. Diagnosing means, acquiring diagnostic data including measurement data and setting value data from the central monitoring system or the input means in accordance with the occurrence item and location of the failure input from the input means, to the diagnostic data Secondary diagnostic means for identifying the faulty device or the cause of the failure based on the primary diagnostic means based on the operation status data of each facility. The faulty device or the cause of the fault is identified by the diagnosis of the secondary diagnostic means based on the diagnostic data on the condition that the faulty area cannot be specified by the judgment of the alarm state or the comparison between the areas. The primary diagnosis can be easily performed by using the information of the central monitoring system by inputting the occurrence items and locations of environmental problems. Further, in the secondary diagnosis, by comparing the measurement data with the set value data, a malfunctioning device or a cause of the malfunction can be specified with high accuracy, and a sudden occurrence of a malfunction can be promptly dealt with. Moreover, since the set value data can be set in accordance with the characteristics of the building / equipment system, it is possible to realize an expert system capable of making a diagnosis on par with a specialized engineer.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a diagram showing one embodiment of a failure diagnosis system according to the present invention.

In FIG. 1, a processing unit 1 includes an input processing unit 2 for inputting data for failure diagnosis, and a primary diagnosis unit 3 for specifying a cause of a failure based on information from a building management system 8 and instructing a countermeasure. A secondary diagnosis unit 4 for performing a diagnosis in the next step when the cause of the failure cannot be identified in the primary diagnosis, and is constituted by, for example, a personal computer. The input device 5 is for inputting a fault item or a fault location for executing a fault diagnosis, and is configured by an interface with a keyboard and a handy type inspection information input / output device. The output device 6 outputs a menu screen, a diagnosis result, and the like, and includes a display, a printer, and the like. The storage device 7 has information on target equipment, setting data for diagnosis, an output menu, a table (comparison value for diagnosis), and the like. The building management system 8 manages the operation of air-conditioning equipment, sanitary equipment, electric equipment, and the like of the building, and provides the processing device 1 with operating state data and various measurement data based on a request from the processing device. .

The primary diagnostic section 3 has a primary diagnostic function, a primary diagnostic result output function, and a secondary diagnostic data generation function. The primary diagnosis function performs a process of determining an alarm state of each device, a process of specifying a defective area, and a process of selecting a target device. In the alarm status judgment process, the status of the alarm signal set for each device is confirmed from the device information obtained from each field, and if the alarm status is on, the diagnosis is stopped by the primary diagnosis and the diagnosis is stopped. Output the result. Also, the status (operation / stop) of the target device is confirmed from the status signal set for each device. In the process of specifying the defective area, the defective area is specified by comparing with the set other floor, the same floor, and the state of the other zone. Then, the failure is specified based on the signal corresponding to the input failure item. In the target device selection process, if a clear determination cannot be made in each of the above processes, a list of devices that cover the area is made.

The primary diagnosis result output function outputs the details of the diagnosis to the screen when the failure is clear in the primary diagnosis, and displays the suspicious device if it is unclear, and moves to the secondary diagnosis processing Is output to the screen.

The data generation function for the secondary diagnosis is to output the failure item data input from the keyboard and the contents obtained in the primary diagnosis to a file.

The secondary diagnostic unit 4 has a secondary diagnostic data input function, a secondary diagnostic function, and an output function.

The secondary diagnosis data input function is a function to input air supply air volume required for diagnosis, external air intake volume, and other data other than data automatically input from the field,
It is done manually.

The secondary diagnostic function compares the data input by the secondary diagnostic data input function with the diagnostic set values of each device such as an air conditioner, a total heat exchanger, an exhaust fan, and a chilled water pump to perform a diagnosis. Yes, furthermore, input of installation value data of each device, input of input upper limit value / lower limit value data, input of controller setting allowable error data, and input of secondary diagnosis data are performed. In this case, an input is first made for each building in accordance with the equipment system, and a value is set in accordance with the thinking of the engineer, thereby enabling a diagnosis on par with an engineer.

The output function is to output a diagnosis result such as a target model, a target device No., a diagnosis result, a countermeasure, etc. on one screen.

In the failure diagnosis in the above system, a failure diagnosis menu as shown in FIG. 2A is displayed on the screen of the output device 6, and is executed by selecting a failure diagnosis item with the cursor key from the menu. In the example shown in FIG. 11A, a state in which the failure diagnosis of the air conditioner is selected is shown, and an example of an input screen of a defect item / point displayed next by the selection is shown in FIG. ). In this example, the level of room temperature
Eight items including humidity level, odor, and draft are set, and an item and an occurrence floor are input from these items. Thereafter, a failure occurrence zone is selected on the screen shown in FIG. 4C, a failure occurrence area is selected on the screen shown in FIG. 4D, and a failure occurrence detailed area is selected on the screen shown in FIG.

Next, failure diagnosis will be described using an air conditioner as an example.

FIG. 3 is a diagram showing a general flow of an example of a failure diagnosis of an air conditioner, FIG. 4 is a flowchart of a primary diagnosis, FIG. 5 is a flowchart of a secondary diagnosis, and FIG. FIG.

First, a failure diagnosis menu shown in FIG. 2A is displayed. For example, if "A. Air conditioning equipment failure diagnosis" is selected,
A failure item / location input screen shown in FIG.
Perform input processing for trouble items such as “1. Room temperature is high (cooling period)” and “2. Then, the floor plan and the air-conditioning zone of the floor in which the trouble has occurred are output as shown in FIG. 3C, the zone is selected, and the area is selected on the screen shown in FIG.

The floor for which data is requested from the building management system (central monitoring facility) is determined based on the inputted trouble occurrence floor, and information on the occurrence floor and other floors is requested from the building management system.

Information on the occurrence floor and other floors (operating state data, measurement data) is obtained from the building management system, and setting value data (temperature and humidity setting values, etc.) of the floor where the failure occurs is obtained from the setting value data file. Then, an item necessary for diagnosis is selected from the central monitoring facility data and the set value data of each device, and only data necessary for diagnosis is written to a file.

The primary diagnosis is performed based on the operation status data of the central monitoring device.

Select the secondary diagnosis flow and required measurement items according to the failure, and write them to a file.

 Output the primary diagnosis result.

The comment of the primary diagnosis result is, for example, "The cause of low room temperature in the 5th floor S zone is considered to be the following items" and "A failure alarm has been issued from the target device. Target device [air conditioner], device number "The same phenomenon can be seen on the whole floor. Check the settings.", "Exhaust fan is stopped. Target device, (device number)", etc. are output.

If the cause of the failure can be identified and the primary diagnosis can be completed, the primary diagnosis is terminated and the display returns to the menu screen (end). When the primary diagnosis cannot identify the faulty device and cannot complete the process, the process proceeds to the next step.

Initiate secondary diagnosis. First, the secondary diagnosis flow corresponding to the failure and the necessary measurement items are transferred, and the set value data of each device and the comparison set value data for diagnosis are selected.

 Make a secondary diagnosis based on the required data.

 Outputs the results of secondary diagnosis and displays countermeasures.

 Thus, the diagnosis is completed and the display returns to the menu screen (end).

FIG. 4 shows a detailed processing flow of the primary diagnosis.

In the primary diagnosis, as shown in FIG. 4 (a), the input zone, the presence or absence of the alarm of the ground cooling, the presence or absence of the alarm of the chilled water pump on the input floor, the air conditioner of the input zone, and the alarm of the filter clogging of the total heat exchanger. Examine presence / absence, presence / absence of alarm of equipment in input zone other than geo-cooled / chilled water pump, and equipment status. If there is an alarm, a comment indicating that the alarm is present is output as the end of the diagnosis. If there is no alarm, a corresponding comment is output depending on the on / off state of the exhaust fan and other devices. When all the devices that must be operating without an alarm are on, a predetermined process is performed by branching to each fault item.

For example, when the room temperature is high or low (defect items 1 to 4),
As a diagnosis for specifying the defective area, comparison of the return air temperature of the input area with the set temperature, comparison of the return air temperature with the other floor and the same zone, return air temperature of the input area as shown in FIG. It may be compared with the return air temperature of the same floor and other zones to determine whether there is no abnormality, specific floor / input area defect, specific floor / entire floor defect, multiple floor / input area defect, etc. . When the humidity is high (defect item 5), the humidity of the input zone is compared with that of the other zone on the same floor as shown in FIG. When the humidity is low (defect item 6), as shown in FIG. 3D, the humidity of the other floor and the same zone is compared, and the humidity of the input zone and the other zone of the same floor are compared. Judgment of a defect in the input area is performed. Then, in the case of the failure items 7 and 8, the diagnosis is advanced as a failure of the specific floor / input area.

As described earlier, the primary diagnosis result comment may be, for example, "The cause is as follows for the XX floor △△ zone, and the following items are considered." …… is giving me a filter clogging alarm. ”
"Target device is stopped. Target device: □□□",
"The temperature matches the plan set temperature. It is judged that there is no more on the device side."
"The setting is incorrect.", "Excessive air supply of air conditioner", "Low air supply of air conditioner", "Malfunction of air outlet direction", "... Valuation of valve operation", " Check the setting value of the VAV system etc. "and output.

Further, in the secondary diagnosis, for example, for a defect item in which the room temperature is hot during the cooling period, as shown in FIG.
Compares measured values such as air supply volume and chilled water two-way valve opening with set values, air conditioner fan failure, air conditioner coil system, strainer clogging, no abnormality, usability, temperature sensor input error, VA
Judgment of V failure, set value abnormality, etc. In this case, the VAV set temperature and the supply air temperature may be included to perform the same diagnosis. As described above, a plurality of determination processing routines are provided as tools for secondary diagnosis in accordance with the results of the primary diagnosis, and by selecting and processing them, a failure or countermeasure corresponding to the fault item is specified.

FIG. 6 (a) shows an example of the input screen for the measurement values in the secondary diagnosis. In this example, the air supply temperature of the air conditioner, the chilled water two-way valve opening, and the air supply temperature setting are set as the controller (DDC) for the location where the failure occurred, such as "the room temperature is low in the S zone on the 5th floor" and the failure item. The value and the chilled water two-way valve opening set value are input. The input item in this case is set as a measured value input of the target device from the primary diagnosis result. Then, the setting values that can be automatically taken in by the building management system are displayed, and the setting values that cannot be taken are input.

The output of the secondary diagnosis result is displayed by, for example, a red comment when there is an abnormality. FIG. 6 (b) shows an example of this, and the result comment sentence of the route passed by the diagnosis of the judgment item in the flowchart shown in FIG. 5 is displayed. For example, "The supply air volume is different from the set value."
"VAV operation is OK.", "Chilled water pump discharge pressure is lower than the set value", etc. are displayed as a result of the secondary diagnosis. As a countermeasure for comment, "Season setting differs from other floors Please correct the seasonal setting. "," No failure on the equipment side is recognized. "," Clean the strainer. "," VAV failure. Is output.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, air conditioning equipment, sanitation equipment, and electrical equipment were targeted.
It goes without saying that other facilities may be added to the target.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, the central monitoring system that centrally monitors and controls the building equipment based on advancing the primary diagnosis and the secondary diagnosis in stages. Since information is used, the presence or absence of alarms for each facility,
Primary diagnosis can be easily performed based on the operation state and the like. In addition, if the result is unclear due to the primary authenticity, the process proceeds to the secondary diagnosis, and in the secondary diagnosis, the measured value is compared with the set value, so that the faulty device or the cause of the defect can be specified with high accuracy,
It is possible to promptly respond to a sudden occurrence of a malfunction. In addition, since the value to be compared (set value) can be freely set and changed, by setting this value in accordance with the characteristics of the building / equipment system, an expert system capable of performing diagnosis like a specialized engineer is possible. Can be realized.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a failure diagnosis system according to the present invention, FIG. 2 is a view showing an example of a display screen, FIG. 3 is a view showing a general flow of an example of failure diagnosis of an air conditioner, FIG. 4 is a flowchart of the primary diagnosis, FIG. 5 is a flowchart of the secondary diagnosis, and FIG. 6 is a diagram showing an example of an input / output screen of the secondary diagnosis. DESCRIPTION OF SYMBOLS 1 ... Processing device, 2 ... Input processing part, 3 ... Primary diagnostic part, 4 ... Secondary diagnostic part, 5 ... Input device, 6 ... Output device, 7 ... Storage device, 8 ... Building Management system.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Kimihiko Gun, 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Takayuki Akimoto 2-161 Kyobashi, Chuo-ku, Tokyo Shimizu Construction (56) References JP-A-1-274209 (JP, A) JP-A-1-265397 (JP, A) JP-A-1-232498 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 25/04

Claims (1)

(57) [Claims] 1. A failure diagnosis system for performing a failure diagnosis of each facility when a failure occurs in the environment in the building in combination with a central monitoring system for monitoring and controlling the operation of each facility in the building. Input means for inputting information for diagnosis of occurrence items, occurrence locations, and other information, and operating status data of each facility according to the occurrence items and occurrence locations of the faults input from the input means from the central monitoring system. Primary diagnostic means for acquiring and determining an alarm state of each device based on the operation status data, specifying a fault area by comparing areas, and specifying a target device for fault diagnosis, and the fault input from the input means. The diagnostic data including the measurement data and the set value data is obtained from the central monitoring system or the input unit in accordance with the occurrence item and the location of the error, and the fault is obtained based on the diagnosis data. Secondary diagnostic means for specifying the equipment and the cause of the failure, the determination of the alarm state of each equipment by the determination of the primary diagnostic means based on the operation status data of each of the equipment, and identification of the defective area by comparison between the areas A failure diagnosis system characterized in that a failure device or a cause of the failure is specified by the diagnosis of the secondary diagnosis means based on the diagnosis data on the condition that the failure has failed.