JP3181728B2 - Air conditioning management system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an air conditioning management system for managing air conditioning equipment.

[0002]

2. Description of the Related Art Conventionally, an air-conditioning management system for automatically managing air-conditioning equipment using a control device such as a computer has been known. This air-conditioning management system monitors output data of a sensor provided in the air-conditioning equipment with a control device, and when an abnormality of the data is detected, performs management such as issuing an alarm or stopping the air-conditioning equipment, and also performs predetermined processing on the data. Is stored continuously for each sampling period.
The data stored in this manner is used as diagnostic data for an abnormality that has occurred in the air conditioning equipment.

[0003]

In the air-conditioning management system as described above, from the viewpoint of abnormality diagnosis using data at the time of abnormality, it is desirable that the sampling period be shorter in order to improve data density. On the other hand, from the viewpoint of saving the data storage medium, the longer the sampling period is, the more desirable it is to reduce the amount of stored data by reducing the number of data storage.

On the other hand, in the conventional air-conditioning management system, the sampling cycle for data storage is always fixed irrespective of whether the data is normal or abnormal. For this reason, the sampling period is inversely proportional to the amount of stored data, and if the sampling period is lengthened to reduce the amount of stored data, the data density at the time of abnormality is reduced, and the diagnostic accuracy has to be reduced.
On the other hand, if the sampling period is shortened to improve the data density used for abnormality diagnosis, the total amount of stored data increases, and a large-capacity data storage medium is required. The burden had to increase.

[0005] As described above, the conventional air conditioning management system includes:
There was a problem that it was impossible to improve the density of abnormal data and reduce the amount of stored data at the same time. In particular, air conditioning equipment data is stored for a long period of 15 years or more, which exceeds the equipment life of the air conditioning equipment, and used for abnormality diagnosis when an abnormality occurs later,
In such a long-term storage, the above-mentioned burden has been further increased.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems of the prior art. It is an object of the present invention to provide an excellent air conditioner capable of improving both the density of abnormal data and reducing the amount of stored data. To provide a management system.

[0007]

In order to achieve the above object, an air-conditioning management system according to a first aspect of the present invention includes a sensor provided in an air-conditioning facility, detecting means for detecting an abnormality in output data of the sensor, Is not detected.
And a period selecting means for selecting a second sampling period set shorter than the first sampling period when the abnormality is detected, and selecting the first or second selected period. Storage means for storing the data at a sampling cycle.

According to a second aspect of the present invention, there is provided the air conditioning management system according to the first aspect, wherein a predetermined part or all of the data is selected as the storage target during the normal operation, and at least during the abnormal operation. An object selecting means for selecting the predetermined data related to the abnormality as an object to be stored is provided.

The air conditioning management system according to a third aspect of the present invention is the air conditioning management system according to the first aspect, further comprising a temporary storage unit for temporarily storing the data at the second sampling period. Is configured to store the data before the detection of the abnormality stored in the temporary storage means at the time of the abnormality.

The air conditioning management system according to a fourth aspect of the present invention is the air conditioning management system according to the first aspect, further comprising compression means for compressing the data stored in the storage means.

[0011]

The air-conditioning management system of the present invention having the above configuration has the following operation. That is, in the first aspect of the present invention, the period selecting means selects the first sampling period in a normal state, and selects the second sampling period set shorter than the first sampling period in an abnormal state. Then, since the storage unit stores the data at the selected first or second sampling period, the sampling period for storing data in an abnormal state is shorter than the sampling period in a normal state. For this reason, the sampling period and the entire data amount are not inversely proportional, and it is possible to improve the density of abnormal data and reduce the amount of stored data.

Further, in the invention according to claim 2, the object selecting means selects a predetermined part or all of the data as the object to be stored in the normal state, and at least in the abnormal state, a predetermined part related to the abnormality. Is selected as the storage target. Therefore, for example, when all data is saved in normal operation and only part of data related to the abnormality is saved in abnormal operation, the amount of abnormal data stored many times in a short sampling cycle is unnecessarily increased. I will not let you. Further, if a small number of data are stored in a normal state and a larger number of data are stored in an abnormal state, it is possible to obtain wider and more detailed data in an abnormal state while reducing the data amount in a normal state.

According to the third aspect of the present invention, the temporary storage means temporarily stores the data at the second sampling period, and the storage means is stored in the temporary storage means when the abnormality occurs. The data before abnormality detection is also stored. Therefore, the data can be stored not only after the occurrence of the abnormality but also before the occurrence of the abnormality in the short second sampling period and retroactively. Therefore, in the abnormality diagnosis, the process leading to the occurrence of the abnormality is analyzed from the data before the occurrence of the abnormality stored as described above, and a more accurate diagnosis can be performed.

According to the fourth aspect of the present invention, since the compression means compresses the data stored in the storage means, the total amount of stored data can be further reduced and the data storage medium can be further saved. it can.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plurality of embodiments in which an air conditioning management system according to the present invention is implemented on a computer will be specifically described below with reference to the drawings.

(1) Configuration of the first embodiment: FIGS. 1 and 2 [Overall Configuration] The air-conditioning management system of the first embodiment is shown in FIG.
As shown in FIG.
It has a sensor 2 of 00 points, a computer 3 connected to the sensor 2, and a hard disk device 4 connected to the computer 3.

[Air-conditioning equipment] Air-conditioning equipment 1 in this embodiment
Although it is not necessary to limit the configuration to a specific configuration, in general, depending on the required capacity, cooling towers, refrigerators, pumps, fans, air conditioners, packaged air conditioners, boilers, steam generators, control valves, etc. Each device such as the instrumentation device is connected by a connecting member such as a pipe or a wind guide. Each of these devices is composed of a plurality of components, and a plurality of sensors 2 are generally attached to each component. FIG. 2 is a configuration diagram of an example of such an air conditioner 1.

[Sensor] The sensor 2 attached to each component as described above is roughly classified into an analog sensor that outputs an analog amount and a digital sensor that outputs a digital value. Examples of analog sensors include temperature sensors such as thermocouples and resistance temperature detectors, humidity sensors such as relative humidity sensors and dew point temperature sensors, pressure sensors such as diaphragm sensors, vibration sensors such as accelerometers, and counting An integration counter that performs this operation can be used. On the other hand, as an example of the digital sensor, there is a movable contact that outputs ON / OFF.

For example, in the air-cooled package type air conditioner, although not shown, the condensation temperature, the evaporation temperature, the discharge temperature, the suction temperature, the high pressure, the low pressure, the discharge gas temperature, the suction gas temperature, the operation status, the cooling / Each sensor 2 for detecting a high pressure cut, a low pressure cut, and an overcurrent besides heating is attached.

[Computer] The computer 3 shown in FIG.
As shown in (1), a CPU (Central Processing Unit) 5, a main memory 6, a timer 7 for transmitting an interrupt signal to the CPU 5 at a period of 10 seconds, and an I / O control circuit 8 are provided. The hard disk device 4 is connected to the CPU 5 via the I / O control circuit 8.

The CPU 5 operates according to a predetermined procedure according to a program (not shown) stored in the main memory 6. Further, on the main memory 6, an allowable value file 9 for storing the allowable value of each output data of the sensor 2, a temporary storage file 10 for the output data, and a normal time file for counting the number of timer interrupts in a normal time. A counter 11 and an abnormal time counter 12 for counting the number of timer interrupts when an error occurs are provided. Also, the hard disk drive 4
Above, a fixed storage file 13 for deterministically storing output data is provided. Although not shown, a work area for CPU is provided on the main memory 6.

(2) Operation of First Embodiment FIG. 3 In the present embodiment having the above configuration, the CPU 5
When an interrupt signal is received from the timer 7, the following procedure is executed according to a program. Here, FIG. 3 is a flowchart showing the operation procedure of the CPU 5 in the present embodiment.

First, all output data is received from the 2000 sensors 2 (step 21), and then it is determined whether or not the abnormality counter 12 is 0 or more (step 22). The abnormality counter 12 has an initial value of 0 when the system is started.
And is added for the first time after the abnormality of the output data is detected. As a result, the abnormal counter 12 has a role as a flag for identifying which of a normal procedure corresponding to normal and an abnormal procedure (FIG. 3) corresponding to abnormal in this procedure. Therefore, in this step 22, when the abnormal time counter is not 0 or more, the CPU 5 executes a normal time procedure corresponding to a normal time.

[Normal Procedure] This normal procedure is executed by the CPU.
This is a part of the operation procedure of No. 5, in which all output data points are stored every 10 minutes which is the first sampling period.

That is, first, an abnormality in the data is detected by comparing the data with an allowable value in the allowable value file 9 (step 23). Therefore, the allowable value file 9 on the CPU 5 and the main memory 6 constitutes the detecting means of claim 1. If an abnormality is detected, the abnormality procedure from step 30 is immediately executed.

If no abnormality is detected, all points of the output data are added to the temporary storage file 10 and temporarily stored (step 24), and the normal time counter 11 is incremented by 1 (step 25). Next, it is determined whether or not the normal state counter 11 has reached 60 (step 26). Normal counter 1
If 1 has not reached 60, the data temporarily stored 10 minutes ago is deleted from the temporary storage file 10 (step 27), and the procedure ends.

In step 26, the normal time counter 1
If 1 has reached 60, it is possible to confirm that 10 minutes, which is the first sampling period, has elapsed since the last deterministic data storage. (Step 28). The data to be transcribed at this time is all data of 2000 points.

Subsequently, in order to measure 10 minutes again, the normal time counter 11 is reset to 0 (step 29).
The data 10 minutes ago in the temporary storage file 10 is erased (step 27), and the procedure ends. In the normal procedure,
By repeating the above, data of all 2,000 points are definitely stored every 10 minutes, which is the first sampling period.

[Abnormal Procedure] If the abnormal counter 12 is larger than 0 in step 22 or if an abnormality is detected in step 23, it is an abnormal time, so an abnormal procedure corresponding to the abnormal time is executed. This abnormal procedure is a part of the operation procedure of the CPU 5 like the normal procedure, and every 10 seconds which is the second sampling cycle,
This is a procedure for saving only output data considered to be related to the abnormality for 20 minutes including 10 minutes before the occurrence of the abnormality. As a specific means for selecting only the data related to the abnormality in this way, for example, each data is grouped by its related function, and only the data belonging to the data group in which the abnormality has occurred is stored. , CPU5
It is conceivable to configure the above procedure.

That is, the output data is first added to the temporary storage file 10 (step 30), and the abnormal counter 12 is incremented by 1 (step 31). Subsequently, it is determined whether or not the abnormal time counter 12 has reached 60 (step 3).
2) If not reached, end the procedure. That is, the maximum number of sets of data in the temporary storage file 10 in the normal state is a maximum of 60 times, whereas the maximum number of sets in the abnormal state is 60 times (10 minutes) before the occurrence of the abnormality and after the occurrence of the abnormality. A total of 120 times for 60 times that are additionally recorded.

In step 32, the abnormal time counter 1
If the number 2 has reached 60, in addition to the data for 10 minutes before the occurrence of the abnormality, the data for 10 minutes after the occurrence
Can be confirmed, the entire contents of the temporary storage file 10 are transferred to the fixed storage file 13 (step 33). The transcribed content at this time includes only output data considered to be related to the abnormality. As described above, the CPU 5 selects all output data as a storage target in a normal state, and selects only data relating to an abnormality as a storage target in an abnormal state. .

It should be noted that the data to be written into the fixed storage file 13 includes identification information such as the date and time when the data is generated and whether the data is normal or abnormal, regardless of whether the data is normal or abnormal. According to the above-described abnormal-time procedure, which is repeated until the abnormal-time counter reaches 60, every 10 seconds which is the second sampling cycle, 20 minutes including 10 minutes before the occurrence of the abnormality are considered to be related to the abnormality. Only output data is stored deterministically.

After step 33, the data of the temporary storage file 10 is erased 60 times before the abnormality is detected (step 34), and the abnormality counter 12 and the normal counter 11 are reset to 0 (step 34). Step 35, 3
6), end the procedure.

In the above normal and abnormal procedures, C
In a normal state, the PU 5 counts the number of interrupt signal inputs from the timer 7 with the normal state counter 11 and performs deterministic storage every 10 minutes, thereby selecting 10 minutes as the first sampling period. On the other hand, when abnormal, 10
Data is added to the temporary storage file 10 when an interrupt signal is input every second, and the temporary storage file 1 is added after 60 additions.
By batch-transferring all the contents of 0 to the fixed storage file 13, the total
Select a second sampling period set to seconds. Thus, the CPU 5, the timer 7, and the normal counter 11
Constitutes the period selecting means according to claim 1.

The CPU 5 includes a hard disk drive 4
By controlling the selected first or second selected
Since the output data is stored deterministically at the sampling period of (1), the CPU 5 and the hard disk device 4
Of the storage means.

The CPU 5 measures the second sampling period of 10 seconds by an interrupt signal from the timer 7 and temporarily stores the data in the temporary storage file 10 every 10 seconds. Therefore, CPU
The temporary storage file 5 and the timer 7 constitute a temporary storage means. In addition, the CPU 5 and the hard disk device 4 definitely store the data before the abnormality detection stored in the temporary storage unit in the case of the abnormality, and thus constitute a storage unit according to a third aspect.

(3) Effects of the First Embodiment As described above, according to the present embodiment, the CPU 5
And performs a function as the cycle selecting means using the normal time counter 11, selects a predetermined first sampling period of 10 minutes in a normal state, and sets a shorter time than the first sampling period in an abnormal state. The second sampling period of 10 seconds is selected. Then, the CPU 5 controls the hard disk device 4 to function as the storage unit, and the selected first or second storage device is selected.
Since the data is stored at the sampling period of, the sampling period for storing data at the time of abnormality is 10 seconds shorter than the sampling period of 10 minutes at normal time.

Therefore, according to the present embodiment, the sampling period and the total amount of stored data are not inversely proportional.
For this reason, even if the normal sampling period is increased to reduce the amount of stored data, the data density at the time of abnormality does not decrease, and the accuracy of abnormality diagnosis using data at the time of abnormality decreases. Can be avoided. Conversely, even if the sampling period is shortened to improve the data density in the event of an abnormality, the total amount of stored data hardly increases even if the sampling period is shortened, and a large-capacity data storage medium is not required. The burden of management work can be reduced.

As described above, according to the present embodiment, it is possible to provide an excellent air-conditioning management system capable of improving both the density of abnormal data and reducing the amount of stored data. In particular,
When data is stored for a long period of 15 years or more, which exceeds the equipment life of the air conditioner, the above-mentioned burden on data storage is significantly reduced.

In particular, in the present embodiment, the target selection means, which is the CPU 5, selects all data as a storage target in a normal state, and selects only a part of data related to an abnormality in an abnormal state. Therefore, the amount of abnormal data stored many times in a short sampling cycle is not unnecessarily increased.

In this embodiment, the temporary storage means constituted by the CPU 5, the temporary storage file 10, and the timer 7 temporarily stores data every 10 seconds, which is the second sampling period. The storage unit constituted by the device 4 also stores data before abnormality detection stored in the temporary storage unit in the event of an abnormality. Therefore, not only after the occurrence of the abnormality but also before the occurrence of the abnormality, the data can be stored retroactively for 10 minutes in the short second sampling cycle. Therefore, in the abnormality diagnosis, the process leading to the occurrence of the abnormality is analyzed from the data before the occurrence of the abnormality stored as described above, and a more accurate diagnosis can be performed.

(4) Second Embodiment The air-conditioning management system according to the first embodiment desirably includes a compression unit that compresses the data stored in the fixed storage file 13. "Compression" here
Means a process of reducing the data amount by a process such as replacing a plurality of data with an average value or removing a specific type of data.

Such a compression means can be realized by, for example, the following means. That is, the first
In the air-conditioning management system according to the embodiment, the fixed storage file 13 has a hierarchical file structure including data blocks of a monthly unit, a daily unit, an hourly unit, and a 10-minute unit in order from an upper block. Are connected by a pointer. For example, every hour block
A set of 2,000 saved data sets at every hour is collected for one day (24). In each of the blocks, a storage period of 15 years, 1 year, 1 month, and 1 week after the occurrence is set in order from the top. Then, by controlling the CPU 5 by a program and operating it in a predetermined procedure, extraction of a compression target block whose storage period has passed, calculation of an average value of data in the block, addition of the average value to an upper block, compression Data compression is performed in each step of erasing the target block (second embodiment). For example, the data of the 10-minute period stored in the first embodiment is compressed after being stored for one week, and is then averaged every six sets of data for one hour. The data is added to the hourly block and the original data block of 10 minutes is erased.

According to the second embodiment, as the information becomes older and the usefulness of the information in the abnormality diagnosis decreases, the compression degree becomes higher. Therefore, the amount of stored data can be further reduced, and the storage medium can be further saved. it can. Note that the content of the compression processing is not limited to the calculation of the average value, and can be freely determined by extracting a specific day from a block for each month. Also, the compression conditions can be freely determined, such as excluding abnormal-time data from compression targets and extracting only operation-time data.

(5) Other Embodiments The present invention is not limited to the above-described embodiments, but also includes the following other embodiments. For example, in the first embodiment, all data of 2,000 points are stored in a normal state, and only data related to the abnormality is stored in an abnormal state.
It is also possible to store only a part of the data determined in advance during normal operation, and to store all data of 2000 points in abnormal operation. By doing so, it is possible to obtain wider and more detailed data than in the normal state while reducing the data amount depending on the length of the sampling period in the normal state.

The operation algorithm of the CPU is not limited to those described in the above embodiments, and any algorithm may be used as long as it achieves the same purpose. In addition, the elements such as the file structure of each file and whether the file is provided on the main memory or the hard disk can be freely determined. That is, the output data can be written to the hard disk from the beginning without providing a temporary storage file, and unnecessary data can be deleted later. Also,
The processing that does not end within the sampling period may be performed using a so-called mastic task method or a distributed processing method.

In each of the above embodiments, the abnormal mode is continued for 10 minutes after the occurrence of the abnormality.
The configuration may be such that the abnormal mode continues only while the abnormality is continuously detected. Elements such as the number of sensors, the number of specific data, and the sampling period are not limited to those described in the above embodiments, but can be freely determined. In addition, the present invention, without using a computer,
The present invention can also be implemented by combining circuit blocks to form a dedicated circuit. In the first embodiment, a timer interrupt is used as a means for determining a sampling period. However, this determination can be made by incorporating a clock in a computer and monitoring the time.

[0048]

As described above, according to the present invention, it is possible to provide an excellent air conditioning management system capable of improving both the density of abnormal data and reducing the amount of stored data.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an air conditioning management system according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an example of an air conditioner.

FIG. 3 is a flowchart of a CPU operation procedure according to the first embodiment of the present invention.

[Explanation of symbols]

 1: Air-conditioning equipment 2: Sensor 3: Computer 4: Hard disk drive 5: CPU 6: Main memory 7: Timer 8: I / O control circuit 9: Allowable value file 10: Temporary save file 11: Normal counter 12: Abnormal Counter 13: Final save file 21 or later: Each step of the procedure

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Norihiro Tanaka 2-3-6 Minami-Aoyama, Minato-ku, Tokyo Co., Ltd. Techno Ryowanai Co., Ltd. (72) Inventor Yoshio Mizoguchi 3-23 Shimoshinmachi, Toyama City, Toyama Prefecture (72) Inventor Hiroyuki Morinaga 3-23 Shimoshinmachi, Toyama City, Toyama Prefecture (72) Inventor Satoshi Izumino 3-23 Shimoshinmachi, Toyama City, Toyama Prefecture (72) Inventor Hiroyuki Masuda 3-23 Shimoshinmachi, Toyama City, Toyama Prefecture ( 56) References JP-A-1-306974 (JP, A) JP-A-2-231964 (JP, A) JP-A-3-117721 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 11/02 F24F 11/02 103 G01D 9/00 G06F 15/74 H02M 7/48

Claims (4)

(57) [Claims] 1. A sensor provided in an air conditioner, a detecting means for detecting an abnormality in output data of the sensor, and a first sampling period is selected when the abnormality is not detected and the abnormality is detected. In the event of an abnormality, there are provided: cycle selection means for selecting a second sampling cycle set shorter than the first sampling cycle; and storage means for storing the data at the selected first or second sampling cycle. Air conditioning management system characterized by the following. 2. A target selection for selecting a predetermined part or all of the data as the storage target in the normal state, and selecting at least the predetermined data related to the abnormality as the storage target in the abnormal state. The air-conditioning management system according to claim 1, further comprising means. 3. Temporary storage means for temporarily storing the data at the second sampling period, wherein the storage means stores the data before abnormality detection stored in the temporary storage means at the time of the abnormality. 2. The air-conditioning management system according to claim 1, wherein the air-conditioning management system is configured to store the information. 4. The air conditioning management system according to claim 1, further comprising a compression unit for compressing the data stored in the storage unit.