JP3418009B2 - Method and apparatus for monitoring and managing refrigeration equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for monitoring and managing refrigerating equipment, and more particularly to operating conditions of a plurality of refrigerating equipment in stores such as supermarkets, for example, freezing / refrigerating showcases, freezing / refrigerating machines, refrigerators and the like. The present invention relates to a method and a device for monitoring the temperature, predicting the occurrence of a failure, outputting appropriate maintenance information, and efficiently managing various refrigeration equipment.

[0002]

2. Description of the Related Art Conventional refrigeration equipment monitoring / managing means, as means for determining equipment malfunction, measures the temperature inside the refrigerator by means of a detector such as a temperature sensor installed in the interior of a showcase or refrigerator. It is common to detect an abnormal internal temperature and issue a warning by a lamp or a buzzer. In this case, the temperature determined to be abnormal is set appropriately for each facility, and a false alarm is issued when the temperature temporarily rises due to factors other than defrosting or failure. In order to prevent the above, a delay time is generally set between the time when the temperature is judged to be abnormal and the time when an alarm is issued. Also,
With respect to a refrigerator, when a protective device that monitors high-pressure pressure rise, overcurrent, abnormal overheating of a compressor, and the like operates, it is generally detected as a contact signal and an alarm is issued.

Further, as the data for judging an abnormality, it is general to individually monitor the internal temperature of each facility and the operating condition of the protective device. Therefore, for example, even if a plurality of showcases connected in parallel to one refrigerator have a similar tendency to increase in temperature, the causal relationship between them is not subject to the determination, and any one of the showcases outputs an alarm. The alarm is issued only when the conditions for occurrence are met.

In addition, the measured data is generally not stored basically, and some devices store the history of occurrence of abnormality and data for the past several hours or days. However, it is used as auxiliary data at the time of maintenance, and does not manage the condition of equipment.

As described above, the conventional device requires an urgent maintenance because the abnormality is notified after the showcase, the refrigerator or the like is in the state of poor cooling or the refrigerator is stopped by the operation of the protective device. However, in some cases, there may be problems such as damage to the product and hindrance to the business of the store. Therefore, if the alarm set value is easily changed in order to quickly detect an abnormality, there is a disadvantage that false alarms are more likely to occur when the temperature temporarily rises due to factors other than defrosting or a failure.

[0006]

That is, the conventional refrigeration equipment monitoring / managing means is provided with a detecting means for detecting the operation data of each part, and the abnormality is determined by the detected data. The operation data is only judged whether it is within the allowable range set for each and an alarm is issued, and each of them makes an error judgment individually. Little attention was paid to changes in data over time.

Further, in order to make an abnormal judgment early and surely, conventionally, as shown in, for example, Japanese Patent Laid-Open No. 3-199874 and Japanese Patent Laid-Open No. 1-203863, there are a large number of internal and external refrigerating facilities. It is necessary to install not only the temperature sensor of the above, but also various detectors that detect the refrigerant pressure and the operating state of various equipment, and the means for analyzing the obtained data becomes complicated, so the equipment cost and construction cost are reduced. Therefore, there has been an inconvenience that a large amount of cost is required for maintenance of these.

The present invention has been made in view of the above circumstances, and it is possible to detect abnormalities of refrigeration equipment early and accurately with a simple structure, and save data of each equipment so that it can be effectively utilized. Therefore, it is an object of the present invention to provide a refrigeration facility monitoring / managing method and device capable of improving the maintenance and management of the facility.

[0009]

[Means for Solving the Problems] In order to achieve the above object, a method for monitoring and managing a refrigerating facility according to the present invention is a freezing / refrigerating showcase installed in a store such as a supermarket, a freezer / refrigerator, a refrigerator, and the like. In the monitoring and management method of various refrigeration equipments,
The refrigerator internal temperature is measured, and the measured internal average temperature, internal maximum temperature, internal minimum temperature and internal temperature setting value, internal average temperature allowable temperature difference, internal maximum and minimum allowable temperature difference Operation status of various refrigeration equipment by comparing
It is characterized by monitoring and managing the operation status of the refrigeration equipment by performing the abnormality determination of the above. Moreover, a plurality of refrigeration / refrigeration showcases, freezers / refrigerators can be installed in the same refrigeration cycle or the same defrost system. If installed, compare the operating status of each freezer / refrigerator showcase / freezer / refrigerator with the operating status of another refrigerator / freezer showcase / freezer / refrigerator in the same refrigeration cycle or the same defrost system. Therefore, the operation status of the refrigeration equipment is monitored and managed.

The refrigerating equipment monitoring / managing apparatus of the present invention is a monitoring / managing apparatus for various refrigerating equipment such as a plurality of refrigerating / refrigerating showcases, freezers / refrigerators, refrigerators, etc. installed in a store such as a supermarket. , The plurality of frozen
Temperature detecting means for measuring the temperature inside the refrigerator showcase, freezer / refrigerator, and average temperature inside the warehouse, maximum temperature inside the warehouse, minimum temperature inside the warehouse from the temperature data measured by the temperature detector Comparing the internal average temperature, internal maximum temperature, internal minimum temperature and preset internal temperature setting value, internal average temperature allowable temperature difference, internal maximum and minimum internal temperature allowable temperature difference
However, by comparing each comparison result, the operation status of various refrigeration equipment
The present invention is characterized in that it is provided with a comparison calculation means for making a regular judgment and an output means for outputting a comparison result or a judgment result in the comparison calculation means.

In addition, in the apparatus of the present invention, the output means is a display or a printer, and further, alarm generation means for generating an abnormal signal is provided, and the detected operation data can be arbitrarily output. The computing means includes a storage unit that stores maintenance data such as repair dates, repair locations, and repair status of the various refrigeration equipment, and the refrigeration equipment includes a plurality of refrigeration / refrigeration systems in one refrigeration cycle or defrost system. The showcase and the refrigerator / freezer are connected in parallel, and the comparison calculation means in this case is
It is characterized by the provision of a mutual comparison unit that compares the operating statuses of multiple freezer / refrigerator showcases and freezers / refrigerators installed in one refrigeration cycle or defrost system.

[0012]

In the present invention, the freezing / refrigerating showcase, the freezing / refrigerating
It monitors the operating status of the refrigeration equipment only from the refrigerator internal temperature to detect the occurrence of abnormalities in the refrigeration equipment.The average temperature inside the refrigerator and the maximum / minimum internal temperature can be set values or allowable temperature differences. By comparing with the freezer / refrigerator showcase, the freezer / refrigerator, and the operating condition of the refrigerator side by grasping the internal temperature situation. Therefore, since only the in-compartment temperature detecting means (temperature sensor) is used as the detecting means for monitoring the operating condition, the device configuration can be simplified and the construction cost can be reduced.

The abnormality is determined by the relationship between the internal temperature set value and the internal average temperature allowable temperature difference with respect to the internal average temperature, and the internal temperature set value and the internal temperature set value and the internal temperature with respect to the internal maximum temperature and the internal minimum temperature. By comparing the relationships between the maximum and minimum internal temperature differences, whether the average temperature inside the refrigerator is biased toward the high temperature side or the low temperature side, whether the maximum internal temperature exceeds the maximum allowable internal temperature, It is determined whether or not the lowest internal temperature is lower than the lowest allowable internal temperature, and from the combination of these abnormal states, for example, an abnormality of the solenoid valve, an abnormality of the internal sensor, a leakage of refrigerant, etc. are determined.

Further, in order to manage the state of each equipment, not only various temperature data but also abnormality data of each equipment, maintenance data, etc. are stored and can be output arbitrarily, so that when abnormality occurs Correspondence becomes easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 1 shows an example of a device configuration of a refrigeration facility to which the present invention is applied, and includes a plurality of refrigerating / refrigerating showcases 11, 12 ,.
Are connected to a plurality of refrigerators 31, 32, .... Each of the freezing / refrigerating showcases 11, 12, ... And the freezing / refrigerating units 21, 22, ... Are provided with a temperature sensor S which is a temperature detecting means for detecting the temperature inside the refrigerator.

The inside temperature data detected by the temperature sensor S is transmitted to the data processing device 2 such as a personal computer through the repeater 1. The data processing device 2 has a display 3 and a printer 4 for outputting processing results,
An alarm generator 5 for issuing an alarm by sound, light, etc. when an abnormality occurs, a keyboard 6 for inputting setting data, maintenance records, etc. are provided. The repeater 1 may be provided with a monitor function for displaying the detected in-compartment temperature data.

FIG. 2 is a block diagram showing an example of the data processing unit of the present invention. As described above, the data processing device 2 includes the temperature sensor S, the display 3, and the printer as output means. 4, an alarm generator 5 and a keyboard 6 as an input means are connected, and a storage means 7 such as a disk device for storing operation data, setting data, maintenance records, etc. is connected. Main processing unit 8
In the above, the inside temperature data from each temperature sensor S is arithmetically processed to calculate the inside average temperature, the inside maximum temperature, and the inside minimum temperature. A clock signal generator 9 for determining the data comparison timing and the elapsed time is provided, and the reference value for the abnormality determination such as the elapsed time of the abnormal state can be calculated.

FIGS. 3 to 5 are flowcharts showing an example of an abnormality determination procedure. In the drawings, Tave is the calculated average temperature in the refrigerator, Tmax is the maximum temperature in the refrigerator, Tmin is the minimum temperature in the refrigerator, and Tset is the minimum temperature in the refrigerator. The inside temperature setting value, dT1 indicates the average inside temperature allowable temperature difference, and dT2 indicates the inside maximum / minimum temperature allowable temperature difference. There are positive side and negative side in the inside average temperature allowable temperature difference and the inside maximum and minimum temperature allowable temperature difference, respectively, but here, the same temperature difference is used for both, and dT1 and dT2 represent the absolute values thereof. I shall.
For example, the allowable average temperature difference in the refrigerator is usually ± 3 ° C, and the allowable maximum temperature difference in the refrigerator is usually ± 5 ° C. Therefore, dT1 = 3 ° C and dT2 = 5 ° C here.

First, in FIG. 3, the absolute value of the difference (Tave-Tset) between the average temperature in the refrigerator and the set temperature value in the refrigerator is compared with the allowable average temperature difference in the refrigerator (dT1) (101),
The average temperature in the refrigerator is within a predetermined range (for example, the set temperature of the refrigerator ± 3
If it is within the range of ℃) (Y), then the maximum temperature in the refrigerator (T
max) is compared with the maximum temperature inside the chamber (a value obtained by adding the difference between the maximum temperature and the minimum temperature inside the chamber to the internal temperature setting value, for example, the internal temperature setting value + 5 ° C) (102), and the maximum internal temperature If the temperature does not exceed the maximum internal temperature allowable temperature (Y), then the internal minimum temperature (Tmin) is calculated as the minimum internal temperature allowable temperature (the internal maximum temperature / minimum internal temperature difference is subtracted from the internal temperature setting value). Value, for example, the internal temperature setting value −5 ° C.) (1
03), if the minimum internal temperature is not lower than the minimum internal temperature allowable temperature (Y), then the average internal temperature, the maximum internal temperature, and the minimum internal temperature are within the predetermined ranges, so in normal operating conditions It is judged that there is (AL0).

In step 103, when the lowest temperature in the refrigerator is lower than the allowable minimum temperature in the refrigerator (N), the average temperature in the refrigerator and the highest temperature in the refrigerator are normal, and only the lowest temperature in the refrigerator is abnormal. It is in the state, and it is determined that the instantaneous supercooling phenomenon has occurred (AL1). In this abnormal state AL1, the leakage of the solenoid valve is considered to be the main cause, so it is necessary to inspect the solenoid valve.

In step 102, if the maximum internal temperature exceeds the maximum internal temperature allowable temperature (N), the internal minimum temperature is compared with the internal minimum temperature allowable temperature (104). If the lowest temperature in the refrigerator is not lower than the allowable minimum temperature in the refrigerator (Y), only the highest temperature in the refrigerator is in an abnormal state, and it is determined that a momentary cooling failure has occurred (AL2). This abnormal state AL2 may be caused by a problem other than the trouble of the device such as clogging of the solenoid valve, inflow of outside air, or human touching the temperature sensor. If this abnormality is immediately resolved, it is considered to be the cause. To be However, when AL2 occurs repeatedly, it is considered that the solenoid valve is clogged, so it is necessary to inspect the solenoid valve. If an abnormality occurs frequently due to inflow of outside air or human contact with the temperature sensor, the installation location of the showcase or the temperature sensor should be taken into consideration.

If the lowest temperature in the refrigerator is lower than the allowable lowest temperature in the refrigerator in step 104 (N), the highest temperature in the refrigerator and the lowest temperature in the refrigerator are determined regardless of the normal average temperature in the refrigerator. Since both are in an abnormal state, it is determined that instantaneous cooling failure or instantaneous overcooling has occurred (AL3). This abnormal state AL3 is the abnormal element of AL1 and AL2.
In addition to the above-mentioned abnormal elements, there may be an abnormality in the defrost (defrost) thermostat, so check the solenoid valve and defrost thermostat.

On the other hand, in step 101, when the internal cold storage temperature is not within the predetermined range, as shown in FIG. 4, the internal cold storage temperature (Tave) is the internal cold storage temperature set value and the internal cold storage temperature allowable temperature. It is determined whether it is higher than the sum (Tset + dT1) of the difference (105), and if the average temperature in the refrigerator is high (Y), the maximum temperature in the refrigerator and the maximum allowable temperature in the refrigerator are continuously determined as in step 102. (106),
When the maximum internal temperature is lower than the maximum internal temperature allowable temperature (Y), the minimum internal temperature and the minimum internal temperature allowable temperature are compared as in step 103 (10).
7).

If the lowest temperature in the refrigerator is not lower than the allowable minimum temperature in the refrigerator in step 107 (Y), both the maximum temperature in the refrigerator and the minimum temperature in the refrigerator are within the predetermined range, and only the average temperature in the refrigerator is high. This is an abnormal condition, and it is determined that cooling failure has occurred (AL4). This abnormal state AL4
Is the deterioration of the surrounding environment where showcases are installed, the cooling air circulation inlet is blocked, the outlet (honeycomb) is dirty, the frost on the cooler is excessive, the gas in the refrigeration cycle is insufficient, and the capacity of the refrigerator is insufficient. There are various causes such as high pressure rise, refrigerator trouble or solenoid valve clogging.

Among these causes, the deterioration of the surrounding environment is
For example, it can be confirmed by a room temperature meter or the like provided separately, and the blocking of the cooling air circulation inlet and the contamination of the outlet can be easily visually inspected. In addition, overfrost can be dealt with by forcibly performing defrost operation and seeing the situation, and it is possible for these to be easily dealt with by non-specialists, so eliminating these relatively simple causes. After that, check the refrigerator related to gas shortage. At this time, by referring to past abnormal data, maintenance data, etc., it is possible to easily pursue the cause related to the refrigerator.

If the lowest temperature in the refrigerator is lower than the allowable minimum temperature in the refrigerator in step 107 (N), only the highest temperature in the refrigerator is normal, the average temperature in the refrigerator is high, and the lowest temperature in the refrigerator. It is an abnormal state where the temperature is low, and it is determined that poor cooling and momentary overcooling have occurred (AL5). This abnormal state AL5 is considered to be caused by the leakage of the solenoid valve which is the abnormal element of AL1 and the abnormal element of AL4.

In step 106, if the maximum internal temperature exceeds the maximum internal temperature allowable temperature (N),
Compare the lowest temperature in the refrigerator and the lowest temperature in the refrigerator (10
8) If the minimum internal temperature is not lower than the minimum internal temperature allowable temperature (Y), the internal minimum temperature is normal, and the internal average temperature and internal maximum temperature are high, which is an abnormal state.
It is determined that poor cooling and instantaneous poor cooling have occurred (AL
6). This abnormal state AL6 is considered to be caused by the abnormal element of AL2 and the abnormal element of AL4.

If the lowest temperature in the refrigerator is lower than the allowable minimum temperature in the refrigerator in step 108 (N), the average temperature in the refrigerator is high and the maximum temperature in the refrigerator is too high. Is too low, and it is determined that continuous cooling failure, instantaneous overcooling, and cooling failure occur (AL7). This abnormal state AL7 is a state in which the temperature control is considerably disturbed, and the AL1, AL2, and
It is considered that each abnormal element of AL4 is the cause.

When the average temperature in the refrigerator is low in step 105 (N), it means that the inside of the refrigerator is supercooled. However, as shown in FIG. The temperature is compared with the maximum internal temperature allowable temperature (109), and when the internal maximum temperature is lower than the internal maximum allowable temperature (Y), the above step 103 is further performed.
Similarly, the lowest temperature in the refrigerator and the allowable minimum temperature in the refrigerator are compared (110).

In step 110, if the lowest temperature in the refrigerator is not lower than the allowable minimum temperature in the refrigerator (Y), both the maximum temperature in the refrigerator and the minimum temperature in the refrigerator are within the predetermined range, and only the average temperature in the refrigerator is low. It is an abnormal state that has become, and it is judged that supercooling has occurred (AL8). This abnormal state AL8 is
Abnormal thermostat due to leakage of solenoid valve or welding of contacts.

If the lowest temperature in the refrigerator is lower than the allowable lowest temperature in the refrigerator in step 110 (N), only the highest temperature in the refrigerator is normal, the average temperature in the refrigerator is low, and the lowest temperature in the refrigerator. It is an abnormal state where the temperature is low, and it is judged that instantaneous supercooling has occurred in addition to continuous supercooling (A
L9). This abnormal state AL9 is considered to be caused by the abnormal element of AL1 and the abnormal element of AL8.

In step 109, if the maximum internal temperature exceeds the maximum internal temperature allowable temperature (N),
Compare the lowest temperature in the refrigerator and the allowable minimum temperature in the refrigerator (11
1) If the minimum internal temperature is not lower than the allowable minimum internal temperature (Y), the internal minimum temperature is normal, the internal average temperature is low, and the internal maximum temperature is high. Yes, it is determined that overcooling and momentary cooling failure have occurred (A
L10). The abnormal state AL10 is considered to be caused by the abnormal element of AL2 and the abnormal element of AL8.

When the lowest temperature in the refrigerator is below the allowable minimum temperature in the refrigerator in step 111 (N), the average temperature in the refrigerator is low, the maximum temperature in the refrigerator is too high, and the minimum temperature in the refrigerator is low. Is too low, and it is determined that instantaneous supercooling and cooling failure occur together with continuous supercooling (AL11). This abnormal state AL11 is a state in which the temperature control is considerably disturbed, like the AL7,
It is considered that the abnormal elements of AL1, AL2 and AL8 are the causes.

In this way, the frozen / refrigerated showcase 1
1, 12 ..., and the freezer / refrigerators 21, 22, ..., The operating conditions are calculated based on the average temperature in the storage, the maximum temperature in the storage, and the minimum temperature in the storage obtained from the temperature data in the storage sent from the temperature sensors S. By monitoring and managing, it is possible to grasp not only the presence or absence of an abnormality but also the cause of the abnormality to some extent.

Furthermore, a plurality of refrigerating / refrigerating showcases and refrigerating units can be installed in the same refrigerating cycle or the same defrosting system.
When a refrigerator is provided, as shown in FIG. 6, determination is made regarding a freezing / refrigerating showcase and a freezing / refrigerator in the same system.

First, step 201 is a judgment as to whether all of the freezing / refrigerating showcases and freezing / refrigerating machines (hereinafter simply referred to as "cases") are in the normal AL0 state in the above-mentioned judgment. If so (Y), it is determined that the case and the refrigerator are functioning normally (ALK0).

Next, at step 202, in all cases A
It is determined whether or not there is an abnormal state of L4 to 7 and when all cases are in the abnormal state of AL4 to 7 (Y), it is determined that a cooling failure has occurred (ALK.
1). This abnormal state ALK1 is caused by electrical troubles in the system, solenoid valve power output OFF, operation circuit fuse blown, cooling machine capacity shortage, high pressure rise, refrigerator trouble, pressure switch trouble, gas shortage, ambient environment It is possible that there are abnormal causes such as excessive frost due to deterioration and defrost setting abnormalities.

In step 203, all cases are A
If it is determined that the abnormal state of L1 ~ 3 (Y),
It is determined that instantaneous defective cooling or supercooling has occurred in the entire case (ALK2). This abnormal state ALK2 is due to electrical trouble in the system such as poor contact of the solenoid valve power supply circuit,
Possible causes of the refrigerator such as a momentary stop of the refrigerator, operation of the inner thermal built into the refrigerator, operation of the discharge pipe thermometer, or forced opening of the solenoid valve during warm gas defrost operation.

Further, when it is judged in step 204 that all cases are in the abnormal state of AL8-11 (Y), it is judged that the entire case is in the supercooled state (A).
LK3). However, since there are almost no elements that cause such an abnormal state ALK3, an abnormality in the data processing unit or a data input error should be considered as the cause.

If it is determined in each step that all cases in the same system are not in the same abnormal state, it is determined that only the cases in which the abnormal states AL1 to 11 have occurred are independent abnormalities ( ALK4).

As described above, not only the operating state of each case but also the operating states of a plurality of refrigerating / refrigerating showcases and refrigerating / refrigerating units provided in the same refrigeration cycle or defrost system are compared to compare the operating states of the cases. It is possible to determine whether the case is a single abnormality. For example, when the abnormal state AL4 occurs, when it is determined that the case is a single abnormality, the environment surrounding the case is deteriorated, the cooling air circulation is performed. Block the suction port, stain the outlet,
It is only necessary to check for excessive frost on the cooler, and when the entire case in the same system is in the abnormal state AL4, it is possible to check for the presence or absence of a refrigerator-related abnormality as described above.

Further, by storing the occurrence status of the above-mentioned instantaneous abnormal state in the storage means 7, it is possible to narrow down the cause of the abnormality, for example, instantaneous supercooling (AL1). When the average temperature in the refrigerator becomes low after several occurrences (AL8 to 11), it can be easily determined that the leakage of the solenoid valve is the cause. In addition, by storing maintenance data such as repair dates, repair points, and repair status of various refrigeration equipment, the status of changes in the average temperature inside the warehouse and the status of changes in the maximum and minimum temperatures can be monitored to check the status of performance. It can be managed and can be used not only to judge the deterioration and aging of equipment but also to determine the cause of repeated failures, which enables appropriate repairs and efficient equipment investment.

Further, by allowing each data to be arbitrarily output to a display or a printer, it is possible to easily confirm each data, and an alarm is issued by light or sound when an abnormality is detected. If so, the confirmation can be easily performed.

[0044]

As described above, according to the present invention,
Average temperature in the freezer / refrigerator showcase and freezer / refrigerator, maximum temperature in the refrigerator, minimum temperature in the refrigerator, and set temperature in the refrigerator,
Since the cause of failure is estimated from the state of occurrence of overcooling or cooling failure by monitoring the relationship between the allowable average temperature difference in the refrigerator and the allowable maximum / minimum temperature difference in the refrigerator, a simple detection means such as a temperature sensor should be used. All you need to do is to turn on / off the pressure and the compressor.
Since data such as FF is not used for the determination, a pressure sensor or the like is unnecessary, and the product cost and construction cost are low. Furthermore, if the thermostat controlling the refrigeration equipment has a data transfer function, the system can be configured without newly installing a sensor.

Further, by comparing the equipment in the same refrigeration cycle or the equipment in the same defrost system, highly accurate judgment can be obtained and early detection of abnormality is possible. Therefore, it is possible to contribute to the prevention of product damage due to equipment failure. In addition, by managing the history of occurrence of abnormalities for each piece of equipment, it becomes easy to determine the necessity of equipment inspection and the items to be focused on. As a result, it becomes possible to perform maintenance efficiently and prevent damages in advance.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration state of a device showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a connection state of devices.

FIG. 3 is a flowchart showing an example of an abnormality determination procedure.

FIG. 4 is a flowchart showing an example of an abnormality determination procedure.

FIG. 5 is a flowchart showing an example of an abnormality determination procedure.

FIG. 6 is a flowchart showing an example of an abnormality determination procedure.

[Explanation of symbols]

1 repeater 2 Data processing device 3 display 4 printer 5 alarm generator 6 keyboard 7 storage means 8 Main processing unit 9 Clock signal generator 11,12 showcase 21,22 Freezer / Refrigerator 31,32 Refrigerator S temperature sensor Tave Calculated average temperature in the refrigerator Tmax Maximum temperature in the refrigerator Tmin Minimum temperature in the refrigerator Tset temperature setting value dT1 Internal average temperature allowable temperature difference dT2 Maximum and minimum allowable temperature difference

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) F25B 49/00 F25D 11/00 101 F25D 23/00 301

Claims (10)

(57) [Claims] 1. A method of monitoring and managing various refrigerating equipment such as a freezing / refrigerating showcase, a freezer / refrigerator, and a refrigerator installed in a store such as a supermarket. The temperature is measured, and the measured average temperature in the storage, maximum temperature in the storage, minimum temperature in the storage,
Internal temperature setting value, average internal temperature allowable temperature difference, maximum internal temperature
Compare the minimum temperature allowable temperature difference and combine each comparison result.
A method for monitoring and managing a refrigerating facility, which comprises determining an abnormality in the operating condition of various refrigerating facilities . 2. A method for monitoring and managing various refrigerating equipment such as a plurality of freezing / refrigerating showcases, freezers / refrigerators, refrigerators, etc. installed in stores such as supermarkets. The temperature inside the refrigerator is measured, and the average temperature inside the refrigerator, the maximum temperature inside the refrigerator, the minimum temperature inside the refrigerator, and the set temperature of the inside of the refrigerator, the allowable average temperature difference inside the refrigerator, the maximum and minimum inside the refrigerator. Operation of various refrigeration equipment by comparing with the allowable temperature difference and combining each comparison result
Monitoring the operation status of the refrigeration equipment by judging the status abnormality and comparing the judged operation status with the operation status of other refrigeration / refrigeration showcases, freezers / refrigerators in the same refrigeration cycle or the same defrost system.・ A refrigeration facility monitoring and management method characterized by management. 3. A plurality of refrigeration / refrigeration showcases installed in a store such as a supermarket, a monitoring / management device for various refrigeration facilities such as freezers / refrigerators, refrigerators, etc. Temperature detecting means for measuring the temperature inside the refrigerator, and an average temperature inside the refrigerator, a maximum temperature inside the refrigerator, and a minimum temperature inside the refrigerator are calculated from the temperature data measured by the temperature detecting means, and the average temperature inside the refrigerator and the inside temperature are calculated. Maximum temperature,
Minimum temperature inside the chamber and preset temperature inside the chamber,
The average temperature allowable temperature difference in the refrigerator and the maximum / minimum allowable temperature difference in the refrigerator are compared, and the results of each comparison are combined to operate the various refrigeration equipment.
A refrigeration facility monitoring / managing apparatus, comprising: a comparison calculation means for judging an abnormality of a turning situation ; and an output means for outputting a comparison result or a judgment result by the comparison calculation means. 4. The output means is configured to perform the comparison result or the determination.
The refrigeration equipment monitoring / managing apparatus according to claim 3, which is a display for displaying a result on a screen. 5. The output means is configured to perform the comparison result or the determination.
The refrigeration equipment monitoring / managing apparatus according to claim 3, which is a printer that prints a result . 6. The refrigerating equipment according to any one of claims 3 to 5, wherein the output means includes an alarm generating means for generating an abnormal signal according to the determination result. Monitoring and management device. 7. The refrigeration equipment monitoring / managing apparatus according to claim 3, wherein the output means is capable of outputting the detected operation data arbitrarily. 8. The refrigerating equipment according to claim 3, wherein the comparison calculation means includes a storage unit for storing maintenance data such as a repair date, a repair location, and a repair status of the various refrigerating equipment. Monitoring and management device. 9. The refrigerating equipment monitoring system according to claim 3, wherein the refrigerating equipment has a plurality of refrigerating / refrigerating showcases and a refrigerator / refrigerator connected in parallel to one refrigerating cycle or defrost system. -Management device. 10. The comparison calculation means comprises a mutual comparison section for comparing the operation statuses of a plurality of refrigeration / refrigeration showcases and refrigeration / refrigerators provided in one refrigeration cycle or defrost system. The refrigeration equipment monitoring / managing apparatus according to claim 9.