JP2019060600A - Abnormality detection system, refrigeration cycle apparatus, and abnormality detection method - Google Patents

Abstract

To provide an abnormality detection system which can reduce a data amount acquired from a refrigeration cycle apparatus, a refrigeration cycle apparatus including the system, and an abnormality detection method which can reduce a data amount acquired from a refrigeration cycle apparatus.SOLUTION: First data including a degree of sub-cooling being a part of parameters measured in a refrigeration cycle apparatus is acquired from the refrigeration cycle apparatus. When the degree of sub-cooling is in a first target range, second data including an opening degree of a pressure reduction device is acquired from the refrigeration cycle apparatus. When the opening degree of the pressure reduction device is not in a second target range, clogging of the pressure reduction device is detected as an abnormality of the refrigeration cycle apparatus.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an abnormality detection system used in a refrigeration cycle apparatus, a refrigeration cycle apparatus including the abnormality detection system, and an abnormality detection method of the refrigeration cycle apparatus.

  Patent Document 1 describes a refrigeration cycle apparatus such as an air conditioner. In this refrigeration cycle apparatus, the refrigerant amount of each component is obtained from the operating state amount of each component constituting the refrigerant circuit, and the calculated refrigerant amount is calculated as the sum of them. Further, the excess or deficiency of the refrigerant amount is determined by comparing the calculated refrigerant amount with the proper refrigerant amount acquired in advance.

Patent No. 4975052 gazette

  However, in the refrigeration cycle apparatus described in Patent Document 1, the calculated amount of refrigerant is calculated based on the operating state amount of each component of the refrigerant circuit, so a large amount of data can be remotely detected to detect an abnormality in the amount of refrigerant. It must be stored in the surveillance system. Therefore, in patent document 1, in order to detect the abnormality of the refrigerating-cycle apparatus containing the abnormality of a refrigerant quantity, the subject that the remote monitoring system which can accumulate a large amount of data existed. Further, in Patent Document 1, since the refrigeration cycle apparatus and the remote monitoring system are connected via a communication network, the communication capacity is limited. Therefore, in patent document 1, in order to detect abnormality of a refrigerating cycle apparatus, the subject that a lot of data could not always be transmitted to a remote monitoring system from a refrigerating cycle apparatus occurred.

  The present invention has been made to solve the problems as described above, and an anomaly detection system capable of reducing the amount of data acquired from a refrigeration cycle apparatus, a refrigeration cycle apparatus provided with the above system, and a refrigeration cycle apparatus It is an object of the present invention to provide an anomaly detection method capable of reducing the amount of data acquired from

  An abnormality detection system according to the present invention is connected to a refrigeration cycle apparatus including a compressor and a pressure reducing device, and includes a first degree of subcooling which is a part of a parameter measured in the refrigeration cycle apparatus and is a control amount. In addition to the parameters measured in the refrigeration cycle apparatus, data is acquired from the refrigeration cycle apparatus, and the degree of subcooling is in a first target range that is a target value of the degree of supercooling in the refrigeration cycle apparatus. Acquiring from the refrigeration cycle apparatus second data including an opening degree of the pressure reducing device, which is a part of the operation amount for adjusting the degree of supercooling to the target value, and the opening degree of the pressure reducing device is When the target value is not within a second target range, which is a normal operation amount used to adjust the degree of subcooling, clogging of the pressure reducing device as an abnormality of the refrigeration cycle device A control device for detecting.

  A refrigeration cycle apparatus according to the present invention includes: a refrigeration cycle circuit including a compressor and a pressure reducing device; and first data including a degree of subcooling which is a part of a parameter measured in the refrigeration cycle circuit and is a control amount. Another one of the parameters measured in the refrigeration cycle circuit when acquired from the refrigeration cycle circuit and in the first target range, in which the degree of subcooling is a target value of the degree of subcooling in the refrigeration cycle circuit A second data including the degree of opening of the pressure reducing device, which is an operation amount for adjusting the degree of subcooling to the target value, from the refrigeration cycle circuit, the degree of opening of the pressure reducing device being the A clogging of the pressure reducing device is detected as an abnormality of the refrigeration cycle circuit when it is not within the second target range, which is a normal operation amount used to adjust the degree of subcooling to the target value. And a that controller.

  Further, an abnormality detection method according to the present invention is an abnormality detection method of an abnormality detection system for detecting an abnormality of a refrigeration cycle apparatus including a compressor and a pressure reducing device, which is one of the parameters measured in the refrigeration cycle apparatus. A first step of acquiring from the refrigeration cycle apparatus first data including the degree of subcooling which is a control amount and a first target which is a target value of the degree of supercooling in the refrigeration cycle apparatus; The second data including the opening degree of the pressure reducing device, which is another part of the parameter measured in the refrigeration cycle device when in the range, and is an operation amount for adjusting the degree of subcooling to the target value. Obtaining from the refrigeration cycle apparatus, and an opening degree of the pressure reducing device is in a second target range which is a normal operation amount used to adjust the degree of supercooling to the target value. When, as abnormality in the refrigerating cycle apparatus, and a step of detecting the clogging of the pressure reducing device.

  According to the present invention, a part of the parameters measured in the refrigeration cycle apparatus can be acquired, so the amount of data acquired from the refrigeration cycle apparatus can be reduced.

It is a refrigerant circuit figure which shows an example of schematic structure of the air conditioning apparatus 101 which concerns on Embodiment 1 of this invention. It is the schematic which shows the example of a connection to the air conditioning apparatus 101 of the management system 106 which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the monitoring apparatus 104 in the management system 106 which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the data storage apparatus 105 in the management system 106 which concerns on Embodiment 1 of this invention. It is a flowchart which shows an example of the control processing performed by the monitoring apparatus 104, when the management system 106 which concerns on Embodiment 1 of this invention is comprised as a data acquisition system. It is the block diagram which showed roughly an example of the process of classify | categorizing the 1st data which concern on Embodiment 1 of this invention into several data groups. It is a flowchart which shows an example of the control processing performed by the monitoring apparatus 104, when the management system 106 which concerns on Embodiment 1 of this invention is comprised as an abnormality detection system. When the management system 106 which concerns on Embodiment 1 of this invention is comprised as an abnormality detection system, it is the graph which showed roughly an example of the abnormality detection in the control part 121 of the monitoring apparatus 104. FIG. 14 schematically illustrates an example of transmission and reception of data between the data transmission apparatus 102 and the management system 106 in the control process of the first embodiment of the present invention. It is a refrigerant circuit figure which shows an example of schematic structure of the air conditioning apparatus 101 which concerns on Embodiment 2 of this invention. It is a flowchart which shows the example of the determination processing of the numerical range for classifying the 1st data into a plurality of data groups in the management system 106 concerning Embodiment 4 of the present invention.

Embodiment 1
A refrigeration cycle apparatus connected to the management system 106 according to the first embodiment of the present invention will be described. For the management system 106, refer to FIG. 2 described later. Although the details of the management system 106 will be described later, in the first embodiment, the management system 106 is configured as, for example, a data acquisition system or an abnormality detection system.

  FIG. 1 is a refrigerant circuit diagram showing an example of a schematic configuration of an air conditioning apparatus 101 according to Embodiment 1. As shown in FIG. In the first embodiment, the air conditioning apparatus 101 is illustrated as a refrigeration cycle apparatus. The air conditioning apparatus 101 of the first embodiment is a multi air conditioner for a building installed in a building, an apartment, a commercial facility, or the like. The air conditioning apparatus 101 can perform a cooling operation or a heating operation by performing a vapor compression refrigeration cycle operation in which a refrigerant for air conditioning is circulated. The cooling operation and the heating operation can be switched by selection on the use unit side.

  As shown in FIG. 1, the air conditioning apparatus 101 has a refrigeration cycle circuit that circulates a refrigerant inside. In the refrigeration cycle circuit, the compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the at least one expansion valve 14a, 14b, the at least one indoor heat exchanger 15a, 15b, and the accumulator 19 are annularly connected through refrigerant pipes. Have a configuration connected to During the cooling operation, the compressor 1, the outdoor heat exchanger 3, the expansion valve 14a and the indoor heat exchanger 15a, or the compressor 1, the outdoor heat exchanger 3, the expansion valve 14b and the indoor heat exchanger 15b are annularly arranged in this order. Connected During heating operation, the refrigerant flow path is switched by the four-way valve 2, and the compressor 1, the indoor heat exchanger 15a, the expansion valve 14a and the outdoor heat exchanger 3, or the compressor 1, the indoor heat exchanger 15b, the expansion valve 14b And the outdoor heat exchanger 3 is annularly connected in this order.

  In addition, the air conditioning apparatus 101 has a bypass circuit 21 that returns part of the refrigerant flowing between the outdoor heat exchanger 3 and the expansion valves 14a and 14b to the accumulator 19. The bypass circuit 21 is provided with a bypass pressure reducing mechanism 20 that reduces the pressure of the refrigerant that has branched to the bypass circuit 21. Furthermore, the air conditioning apparatus 101 has a supercooling heat exchanger 11 for cooling the refrigerant flowing between the outdoor heat exchanger 3 and the expansion valves 14a and 14b by heat exchange with the refrigerant depressurized by the bypass pressure reducing mechanism 20. doing.

  The air conditioning apparatus 101 includes, for example, one heat source unit 304 installed outdoors, and a plurality of usage units 303 a and 303 b installed, for example, indoors and connected in parallel to the heat source unit 304. ing. The heat source unit 304 and the usage units 303 a and 303 b are connected via the liquid pipe 27 and the gas pipe 28. The liquid pipe 27 and the gas pipe 28 are extended pipes that connect the heat source unit 304 and the usage units 303a and 303b, and are a part of refrigerant pipes that constitute a refrigeration cycle. Although FIG. 1 shows one heat source unit 304 and two utilization units 303a and 303b, the air conditioning apparatus 101 may have two or more heat source units 304, or one You may have only 3 or 3 or more other utilization units. The heat source unit 304 is an example of an indoor unit. Moreover, utilization units 303a and 303b are examples of indoor units, and are also called load units.

  The heat source unit 304 accommodates the compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the accumulator 19, the overcooling heat exchanger 11, the bypass pressure reducing mechanism 20 and the like. In the heat source unit 304, the outdoor fan 4 for blowing the outside air to the outdoor heat exchanger 3 is accommodated.

  The expansion unit 14a and the indoor heat exchanger 15a are accommodated in the utilization unit 303a. Moreover, although not shown in figure, the indoor fan which ventilates air to the indoor heat exchanger 15a is accommodated in utilization unit 303a. Similarly, although not shown, the utilization unit 303b accommodates the expansion valve 14b, the indoor heat exchanger 15b, and an indoor fan for blowing air to the indoor heat exchanger 15b.

  The compressor 1 is a fluid machine that compresses low-pressure refrigerant that has been taken in and discharges it as high-pressure refrigerant. The rotation speed of the compressor 1 of the first embodiment is controlled by an inverter.

  The four-way valve 2 is an example of the refrigerant flow switching device, and is a valve that switches the flow direction of the refrigerant between the cooling operation and the heating operation. The four-way valve 2 has first to fourth four ports. The first port is connected to the discharge side of the compressor 1. The second port is connected to the outdoor heat exchanger 3. The third port is connected to an accumulator 19 connected to the suction side of the compressor 1. The fourth port is connected to the gas pipe 28. During the cooling operation, the four-way valve 2 is set in a state where the first port and the second port are in communication and the third port and the fourth port are in communication, as indicated by the solid line in FIG. At the time of heating operation, the four-way valve 2 is set in a state where the first port and the fourth port communicate with each other and the second port and the third port communicate with each other, as shown by the broken line in FIG.

  The outdoor heat exchanger 3 is also referred to as a heat source side heat exchanger, and functions as a condenser during the cooling operation and as an evaporator during the heating operation. As shown in FIG. 1, the outdoor heat exchanger 3 is configured, for example, as an air-cooled heat source side heat exchanger in which heat exchange is performed between the refrigerant flowing inside and the air blown by the outdoor blower 4, ie, the outside air. it can. The air-cooled heat source side heat exchanger can be configured, for example, as a cross fin type fin-and-tube heat exchanger composed of a heat transfer pipe and a plurality of fins. The condenser is also referred to as a radiator, and the evaporator is also referred to as a cooler.

  The outdoor blower 4 is also referred to as a heat source side blower fan, and is capable of variably adjusting the flow rate of air supplied to the outdoor heat exchanger 3. The outdoor blower 4 is, for example, a propeller fan driven by a DC fan motor.

  The accumulator 19 has a refrigerant storage function for storing surplus refrigerant, and air that prevents a large amount of liquid refrigerant from flowing into the compressor 1 by retaining the liquid refrigerant that is temporarily generated when the operating state changes. And a liquid separation function.

  The expansion valves 14a, 14b are, for example, electronic expansion valves whose opening degree can be adjusted in multiple stages or continuously. As the electronic expansion valve, for example, a linear electronic expansion valve is used. The expansion valves 14a and 14b are an example of a pressure reducing device, and other pressure reducing devices such as a capillary can be used instead of the expansion valves 14a and 14b.

  The indoor heat exchangers 15a and 15b are also referred to as load side heat exchangers, and function as an evaporator during the cooling operation and function as a condenser during the heating operation. In the indoor heat exchangers 15a and 15b, heat exchange is performed between the refrigerant flowing inside and the air blown by the indoor blower. The indoor heat exchangers 15a and 15b can be configured, for example, as a cross fin type fin-and-tube heat exchanger composed of a heat transfer pipe and a plurality of fins.

  Further, in the air conditioner 101, a pressure sensor 201 that detects a discharge pressure that is a pressure of the refrigerant discharged from the compressor 1 and a pressure sensor that detects a suction pressure that is a pressure of the refrigerant that is drawn into the compressor 1 And 211 are provided. The pressure sensors 201 and 211 output detection signals to the control unit 107 described later.

  Further, the air conditioning apparatus 101 is provided with a plurality of temperature sensors which directly or indirectly detect the temperature of the refrigerant in the refrigeration cycle through refrigerant pipes or the like. Specifically, the heat source unit 304 includes a temperature sensor 202 that detects the temperature of the refrigerant discharged from the compressor 1 and a refrigerant on the liquid side of the outdoor heat exchanger 3, ie, the outdoor heat exchanger 3 during the cooling operation. Temperature sensor 203 for detecting the temperature of the liquid refrigerant flowing out of the liquid refrigerant and the liquid refrigerant flowing into the outdoor heat exchanger 3 during heating operation or the two-phase refrigerant, and the high pressure side flow passage of the subcooling heat exchanger 11 and the liquid pipe 27 Temperature sensor 207 for detecting the temperature of the refrigerant between them, the temperature sensor 212 for detecting the temperature of the refrigerant between the bypass pressure reducing mechanism 20 and the low pressure side passage of the subcooling heat exchanger 11, and the subcooling heat exchanger 11 And a temperature sensor 213 for detecting the temperature of the refrigerant on the outlet side of the low pressure side channel. The utilization unit 303a is provided with temperature sensors 208a and 209a that detect the temperature of the refrigerant on the inlet side and the outlet side of the indoor heat exchanger 15a. Similarly, the utilization unit 303b is provided with temperature sensors 208b and 209b that detect the temperature of the refrigerant on the inlet side and the outlet side of the indoor heat exchanger 15b.

  Further, the heat source unit 304 is provided with a temperature sensor 214 that detects the temperature of the bottom of the compressor 1 and a temperature sensor 204 that detects an ambient temperature such as the outside air temperature of the heat source unit 304. The usage unit 303a is provided with a temperature sensor 210a that detects an ambient temperature such as the room temperature of the usage unit 303a. The use unit 303b is provided with a temperature sensor 210b that detects an ambient temperature such as the room temperature of the use unit 303b.

  The air conditioning apparatus 101 also includes a control unit 107. The control unit 107 includes a microcomputer provided with a CPU, a ROM, a RAM, an I / O port, and the like. The control unit 107 may be configured of a heat source unit control device provided in the heat source unit 304 and a use unit control device provided in each of the usage units 303a and 303b and capable of data communication with the heat source unit control device.

  The control unit 107 performs at least the refrigeration cycle based on detection signals and the like from the pressure sensors 201 and 211 and the temperature sensors 202, 203, 204, 207, 208a, 208b, 209a, 209b, 210a, 210b, 212, 213, and 214. Controls the operating state of the air conditioner 101 including the operation and stop of the Further, the control unit 107 controls pressure and temperature data obtained based on detection signals from various sensors at least during the operation period of the refrigeration cycle, or at all times including the operation period and the stop period of the refrigeration cycle, the operation of the refrigeration cycle Data indicating the stop / stop state, and operation data and the like for each unit period of the air conditioning apparatus 101, for example, for each day may be transmitted to the data transmission apparatus 102. For example, as data transmitted from the control unit 107 to the data transmission device 102, data of pressure and temperature of refrigerant in the refrigeration cycle, data of bottom temperature of the compressor 1 of the refrigeration cycle, data of ambient temperature of the heat source unit 304 , Data of the ambient temperature of the use units 303a and 303b, and the like are included.

  Next, the operation of the air conditioning apparatus 101 will be described. The control unit 107 can control the devices mounted on the heat source unit 304 and the usage units 303a and 303b based on the request from the usage units 303a and 303b, and can execute the cooling operation mode and the heating operation mode. .

  First, the cooling operation mode will be described. In the cooling operation mode, the discharge side of the compressor 1 and the outdoor heat exchanger 3 are connected, and the four-way valve 2 is controlled such that the suction side of the compressor 1 and the gas pipe 28 are connected.

  The high temperature and high pressure gas refrigerant discharged from the compressor 1 flows into the outdoor heat exchanger 3 via the four-way valve 2. In the cooling operation, the outdoor heat exchanger 3 functions as a condenser. That is, in the outdoor heat exchanger 3, heat exchange is performed between the refrigerant flowing inside and the outside air blown by the outdoor blower 4, and the condensation heat of the refrigerant is released to the blowing air. Thereby, the refrigerant which has flowed into the outdoor heat exchanger 3 is condensed to be a high pressure liquid refrigerant. The high pressure liquid refrigerant is cooled by the subcooling heat exchanger 11 by heat exchange with the low pressure refrigerant. Thereafter, part of the liquid refrigerant flows into the bypass circuit 21, and the other liquid refrigerant flows into the liquid pipe 27.

  The high-pressure liquid refrigerant that has passed through the liquid pipe 27 is decompressed by the expansion valves 14a and 14b to be a low-pressure two-phase refrigerant. The low-pressure two-phase refrigerant having passed through the expansion valves 14a and 14b flows into the indoor heat exchangers 15a and 15b. In the cooling operation, the indoor heat exchangers 15a and 15b function as an evaporator. That is, in the indoor heat exchangers 15a and 15b, heat exchange is performed between the refrigerant flowing inside and the indoor air blown by the indoor fan, and the evaporation heat of the refrigerant is absorbed from the blown air. As a result, the refrigerant flowing into the indoor heat exchangers 15a and 15b evaporates and becomes a low-pressure gas refrigerant or a two-phase refrigerant. In addition, the air blown by the indoor fan is cooled by the heat absorbing function of the refrigerant and becomes cold air. The low-pressure gas refrigerant or two-phase refrigerant that has passed through the indoor heat exchangers 15 a and 15 b passes through the gas pipe 28 and the four-way valve 2 and flows into the accumulator 19. The low pressure gas refrigerant in the accumulator 19 is drawn into the compressor 1 and compressed to become a high temperature and high pressure gas refrigerant. In the cooling operation, these cycles are repeated.

  During the cooling operation, the compressor 1 is controlled such that the evaporation temperature becomes a predetermined value. The evaporation temperature is a saturation temperature at the suction pressure detected by the pressure sensor 211. The outdoor blower 4 is controlled such that the condensation temperature becomes a predetermined value. The condensation temperature is a saturation temperature at the discharge pressure detected by the pressure sensor 201. That is, the compressor 1 and the outdoor blower 4 have a function of controlling the refrigerant pressure. The bypass pressure reducing mechanism 20 is controlled such that the bypass superheat degree becomes a predetermined value. The bypass superheat degree is a value obtained by subtracting the temperature detected by the temperature sensor 212 from the temperature detected by the temperature sensor 213. The expansion valve 14a is controlled such that the degree of indoor superheat becomes a predetermined value. The degree of indoor superheat is a value obtained by subtracting the temperature detected by the temperature sensor 208a from the temperature detected by the temperature sensor 209a. Similarly, the expansion valve 14b is controlled such that the degree of indoor superheat, which is a value obtained by subtracting the temperature detected by the temperature sensor 208b from the temperature detected by the temperature sensor 209b, becomes a predetermined value.

  Further, during the cooling operation, the entire system of the air conditioning apparatus 101 is controlled such that the degree of subcooling falls within the constant temperature range when the condensing temperature falls within the constant temperature range. . The degree of supercooling is a value obtained by subtracting the temperature detected by the temperature sensor 207 from the saturation temperature at the discharge pressure detected by the pressure sensor 201.

  Next, the heating operation mode will be described. In the heating operation mode, the discharge side of the compressor 1 and the gas pipe 28 are connected, and the four-way valve 2 is controlled such that the suction side of the compressor 1 and the outdoor heat exchanger 3 are connected.

  The high temperature and high pressure gas refrigerant discharged from the compressor 1 flows into the indoor heat exchangers 15a and 15b via the four-way valve 2 and the gas pipe 28. In the heating operation, the indoor heat exchangers 15a and 15b function as a condenser. That is, in the indoor heat exchangers 15a and 15b, heat exchange is performed between the refrigerant flowing inside and the indoor air blown by the indoor blower, and the condensation heat of the refrigerant is released to the blown air. As a result, the refrigerant that has flowed into the indoor heat exchangers 15a and 15b condenses and becomes a high-pressure liquid refrigerant. In addition, the air blown by the indoor fan is heated by the heat radiation of the refrigerant and becomes warm air. The high pressure liquid refrigerant condensed by the indoor heat exchangers 15a and 15b is decompressed by the expansion valves 14a and 14b to be a low pressure two-phase refrigerant.

  The low-pressure two-phase refrigerant having passed through the expansion valves 14a and 14b flows into the outdoor heat exchanger 3 via the liquid pipe 27 and the subcooling heat exchanger 11. In the heating operation, the outdoor heat exchanger 3 functions as an evaporator. That is, in the outdoor heat exchanger 3, heat exchange is performed between the refrigerant flowing inside and the outside air blown by the outdoor blower 4, and the evaporation heat of the refrigerant is absorbed from the blowing air. Thereby, the refrigerant which has flowed into the outdoor heat exchanger 3 evaporates and becomes a low pressure gas refrigerant. The low pressure gas refrigerant flows into the accumulator 19 through the four-way valve 2. The low pressure gas refrigerant in the accumulator 19 is drawn into the compressor 1 and compressed to become a high temperature and high pressure gas refrigerant. In heating operation, these cycles are repeated.

  During the heating operation, the compressor 1 is controlled such that the condensation temperature becomes a predetermined value. The outdoor blower 4 is controlled such that the evaporation temperature becomes a predetermined value. The expansion valves 14a and 14b are controlled such that the degree of subcooling in the room becomes a predetermined value. The degree of room supercooling is a value obtained by subtracting the temperature detected by the temperature sensor 208 a or the temperature sensor 208 b from the saturation temperature at the discharge pressure detected by the pressure sensor 201.

  Further, during the heating operation, the entire system of the air conditioning apparatus 101 is controlled such that the degree of subcooling falls within a certain temperature range when the condensation temperature falls within a certain temperature range. . The degree of supercooling is a value obtained by subtracting the temperature detected by the temperature sensor 208a or the temperature sensor 208b from the saturation temperature at the discharge pressure detected by the pressure sensor 201.

  Next, the management system 106 of Embodiment 1 connected to the above-described refrigeration cycle apparatus will be described. As described above, in the first embodiment, the management system 106 of the refrigeration cycle apparatus is configured as a data acquisition system or an abnormality detection system. Moreover, below, it demonstrates using the air conditioning apparatus 101 as an example of a refrigerating-cycle apparatus connected to the management system 106. FIG.

  FIG. 2 is a schematic view showing an example of connection of the management system 106 according to Embodiment 1 to the air conditioning apparatus 101. As shown in FIG. As shown in FIG. 2, the management system 106 can connect to the data transmission device 102 connected to at least one air conditioning device 101 via the communication network 103.

  The data transmission device 102 is configured, for example, as a local controller, and is installed in the article 108 together with the air conditioning device 101. The data transmission device 102 is connected to one or more air conditioning devices 101 directly or via a dedicated adapter. The data transmission device 102 transmits and receives data to and from the control unit 107 of one or more air conditioning devices 101, and centrally manages the air conditioning devices 101. The data transmission apparatus 102 has a microcomputer provided with a CPU, a ROM, a RAM, an I / O port, and the like. In addition, the data transmission apparatus 102 is configured to transmit and receive data with the management system 106. For example, the data transmission apparatus 102 periodically receives data such as pressure and temperature from the control unit 107, and transmits the received data to the management system 106.

  The management system 106 has a monitoring device 104 that processes data received from the data transmission device 102, and a data storage device 105 that stores data received from the data transmission device 102. The management system 106 can be installed, for example, as a remote server remote from the property 108, for example, in a remote management center.

  FIG. 3 is a block diagram showing the configuration of the monitoring device 104 in the management system 106 according to the first embodiment. As illustrated in FIG. 3, the monitoring device 104 is an example of a control device in the management system 106, and includes an arithmetic unit 120, a control unit 121, a communication unit 122, and a display unit 123. The operation unit 120 is configured to perform an operation such as calculating an average value of data. The control unit 121 is configured to control a data transmission instruction to the data transmission apparatus 102 and the like. For example, when the management system 106 is configured as an abnormality detection system, the control unit 121 can be configured to perform control of setting of an abnormality detection mode, abnormality determination, and the like. The communication unit 122 is configured to transmit and receive data to and from the data transmission apparatus 102 via the communication network 103 such as the Internet line, and to transmit and receive data to and from the data storage apparatus 105. For example, when the management system 106 is configured as an abnormality detection system, the display unit 123 is configured to display the determination result of the abnormality determination of the air conditioning apparatus 101 performed by the monitoring device 104, that is, the presence or absence of an abnormality. Be done.

  FIG. 4 is a block diagram showing the configuration of the data storage device 105 in the management system 106 according to the first embodiment. As shown in FIG. 4, the data storage device 105 has a storage device 140. The storage device 140 is provided with a communication unit 141 that transmits and receives data to and from the monitoring device 104, and a storage unit 142 that stores received data. The data storage device 105 receives one set of data from the monitoring device 104, for example, data of pressure or temperature of the refrigeration cycle of the air conditioner 101, and data of the ambient temperature of the heat source unit 304, the ambient temperature of the utilization units 303a and 303b. When data is received, one set of data is associated with each other, and is sequentially accumulated in the storage unit 142 as new data in time series. In the first embodiment, the data storage device 105 is connected to the communication network 103 via the monitoring device 104, but the data storage device 105 may be directly connected to the communication network 103.

  In the first embodiment, the data transmission apparatus 102, the monitoring apparatus 104, and the data storage apparatus 105 are configured separately from the air conditioning apparatus 101, but the functions of the data transmission apparatus 102, the monitoring apparatus 104, and the data storage apparatus 105 are different. The control unit 107 of the air conditioner 101 may be configured to be provided. Further, in the first embodiment, the management system 106 is configured to connect to the air conditioning apparatus 101 via the data transmission apparatus 102 and the communication network 103, but to directly connect to the air conditioning apparatus 101. It may be configured.

  Next, when the management system 106 according to the first embodiment is configured as a data acquisition system, control processing executed by the monitoring device 104 will be described using FIG.

  FIG. 5 is a flowchart showing an example of control processing executed by the monitoring device 104 when the management system 106 according to the first embodiment is configured as a data acquisition system. The process shown in FIG. 5 is repeatedly performed at predetermined time intervals at all times including at least the operation of the air conditioning apparatus 101 or only while the air conditioning apparatus 101 is operating.

  Further, in the following description, among the parameters measured in the air conditioning apparatus 101, the parameters indicating the pressure or temperature of the air conditioning apparatus 101, for example, the pressure or temperature data in the refrigeration cycle of the air conditioning apparatus 101, etc. , Called environmental parameters. Further, among the parameters measured in the air conditioning apparatus 101, a device constituting the air conditioning apparatus 101 such as the frequency of the compressor 1, the opening degree of the expansion valves 14a and 14b, or the number of rotations of the outdoor blower 4, The parameter indicating the operating state is referred to as the operating state parameter.

  In step S 1, the control unit 121 of the monitoring device 104 transmits the first data, which is a part of the parameter measured in the air conditioning apparatus 101, from the air conditioning apparatus 101 to the data transmission apparatus 102 and the communication network 103. Perform processing to acquire. For example, the first data includes the parameter of the environment in the air conditioning apparatus 101 or the parameter of the operating condition of the air conditioning apparatus 101.

  In step S2, the control unit 121 of the monitoring apparatus 104 performs a process of classifying the acquired first data into a plurality of data groups. The numerical range of the plurality of data groups is determined to be an arbitrary numerical range in accordance with the attribute of the first data such as the condensation temperature and the evaporation temperature. FIG. 6 is a block diagram schematically showing an example of the step of classifying the first data into a plurality of data groups according to the first embodiment. As shown in FIG. 6, the first data classified by the monitoring device 104 is transmitted to the data storage device 105. The transmitted first data is stored for each data group in the storage unit 142 of the storage device 140 in the data storage device 105. An operation for classifying the first data into a plurality of data groups is performed by the operation unit 120 of the monitoring device 104.

  In step S3, the control unit 121 of the monitoring apparatus 104 performs a process of selecting an index data group to be a target range from among the plurality of stored data groups. For the index data group to be the target range, for example, the frequency which is the occurrence rate of a plurality of data groups is calculated by the calculation unit 120 of the monitoring device 104, and the control unit 121 of the monitoring device 104 frequently calculates the frequency based on the result of the calculation. It is determined by selecting the index data group of In FIG. 6, the high-frequency index data group to be the target range is illustrated as "condition A".

  In step S4, the control unit 121 of the monitoring apparatus 104 determines whether the first data is in the target range. If it is determined that the first data is not within the target range, the control process ends. For example, in FIG. 6, in step S4, it is determined whether the first data satisfies the condition A or not. If it is determined that the first data does not satisfy the condition A, for example, if the first data satisfies the low frequency conditions B and C in FIG. 6, the control process ends.

  If it is determined that the first data is in the target range, then in step S5, the control unit 121 of the monitoring device 104 selects second data that is another part of the parameter measured by the air conditioning apparatus 101, A process of acquiring data from the air conditioning apparatus 101 via the data transmission apparatus 102 and the communication network 103 is performed. The second data includes the parameter of the environment in the air conditioning apparatus 101 or the parameter of the operating state of the air conditioning apparatus 101 and is different from the first data.

  Specifically, in step S5, the control unit 121 of the monitoring apparatus 104 transmits a transmission instruction of the second data to the data transmission apparatus 102. The data transmitting apparatus 102 that has received the data transmission instruction acquires the second data from the air conditioning apparatus 101, and transmits the second data to the management system 106 via the communication network 103. The control unit 121 of the monitoring device 104 in the management system 106 transmits the acquired second data to the data storage device 105. The second data transmitted to the data storage device 105 is stored in the storage unit 142 of the storage device 140 in the data storage device 105.

  Although the configuration in which the target range of the first data is determined in the monitoring device 104 is illustrated in steps S2 to S4, the target range of the first data is the attribute of the first data, air conditioning It may be preset to a predetermined value in consideration of the specification of the device 101 or the like. For example, when the first data is the condensation temperature, the target range of the first data, that is, the target temperature range of the condensation temperature can be set in the range of 33 ° C to 37 ° C.

  Next, when the management system 106 according to the first embodiment is configured as an abnormality detection system, control processing executed by the monitoring device 104 will be described using FIG. 7.

  FIG. 7 is a flowchart showing an example of control processing executed by the monitoring device 104 when the management system 106 according to the first embodiment is configured as an abnormality detection system. Similar to the process of FIG. 5, the process shown in FIG. 7 is repeatedly performed at predetermined time intervals at all times including at least the operation of the air conditioning apparatus 101 or only while the air conditioning apparatus 101 is operating.

In step S11, the control unit 121 of the monitoring device 104, as in the process of step S1 in the data acquisition system, reduces the first data, which is a part of the parameters measured in the air conditioning apparatus 101, to the air conditioning apparatus. Processing to acquire from 101 is performed. In step S12, the control unit 121 of the monitoring apparatus 104 performs a process of classifying the acquired first data into a plurality of data groups, as in the process of step S2 in the data acquisition system.
In step S13, the control unit 121 of the monitoring apparatus 104 selects the index data group to be the first target range from the plurality of stored data groups, as in the process of step S3 in the data acquisition system. Do the process. The index data group is a data group which is an index of abnormality detection in the abnormality detection system. In step S14, as in the process of step S4 in the data acquisition system, the control unit 121 of the monitoring device 104 determines whether the first data transmitted from the data transmission device 102 is within the first target range. Is determined. If it is determined that the first data is in the first target range, the control unit 121 of the monitoring device 104 measures in the air conditioning apparatus 101 in step S15 as in the process of step S5 in the data acquisition system. A process of acquiring second data, which is another part of the parameters to be performed, from the air conditioning apparatus 101 via the data transmission apparatus 102 and the communication network 103 is performed.

  In step S16, the control unit 121 of the monitoring apparatus 104 performs a process of comparing the second data with the second target range. The comparison operation is performed by the operation unit 120 of the monitoring device 104. For example, the control unit 121 of the monitoring device 104 causes the second data acquired in the past to be stored as the third data in the storage unit 142 of the storage device 140 in the data storage device 105 and stores the second data in the storage device 140. The second target range may be determined from the received third data.

  In step S17, the control unit 121 of the monitoring apparatus 104 determines whether the second data is in the second target range. If it is determined that the second data is in the second target range, the second data is considered to be a normal value, and the control process ends.

  If it is determined that the second data is not within the second target range, in step S18, the control unit 121 of the monitoring device 104 detects that the second data is abnormal.

  FIG. 8 is a graph schematically showing an example of abnormality detection in the control unit 121 of the monitoring apparatus 104 when the management system 106 according to the first embodiment is configured as an abnormality detection system. The vertical axis in FIG. 8 is the size of the second data. For example, when the second data is the operating frequency of the compressor 1, the unit of the vertical axis is Hz. The horizontal axis of FIG. 8 indicates the passage of time. Two dotted lines parallel to the horizontal axis drawn in the graph of FIG. 8 represent a second target range determined to be a normal value from the past second data. The magnitude of the second data at any given time is shown in the plot. As shown in the graph of FIG. 8, the monitoring device 104 determines that the current second data is determined from the numerical range of the past second data, ie, the third data stored in the storage device 140. It can be configured to determine an abnormality when it deviates from the target range of two.

  When it is detected that the second data is abnormal, the control unit 121 of the monitoring device 104 can be configured to cause the display unit 123 to display the abnormality in real time. Further, the control unit 121 of the monitoring device 104 can be configured to output the second data stored in the storage device 140 as shown in the graph of FIG. 8 at the time of maintenance inspection or periodic inspection of the air conditioning apparatus 101. By outputting the second data as a graph, the maintenance inspector or the periodic inspector of the air conditioning apparatus 101 can detect an abnormality from the data transition of the graph.

  Next, transmission / reception of data between the data transmission apparatus 102 and the management system 106 when the management system 106 is configured as an abnormality detection system, and abnormality detection in the management system 106 are specifically described using Embodiments 1 to 3 Explain to.

  In the following first to third embodiments, the first data, the second data, the condition A which is an index data group serving as an indicator of abnormality detection, and the condition B which is another data group described in the control process of FIG. And C, and the numerical range of the past second data are specifically identified. As described in the control process of FIG. 7, the condition A corresponds to the first target range, and the conditions B and C are data groups outside the first target range. In addition, the numerical value range of the past second data corresponds to the second target range determined from the third data stored in the storage device 140.

  Further, in the following first to third embodiments, the first data corresponds to the control amount in the air conditioning apparatus 101. The first target range corresponds to the target value of the control amount in the air conditioning apparatus 101. The second data corresponds to the operation amount for adjusting the first data to the target value of the control amount in the air conditioning apparatus 101. The second target range is a normal operation amount used to adjust the first data to the target value of the control amount in the air conditioning apparatus 101.

Example 1
A first example of the first embodiment will be described with reference to FIG. FIG. 9 schematically shows an example of transmission and reception of data between the data transmission apparatus 102 and the management system 106 in the control process of the first embodiment. The vertically extending arrows indicate the passage of time, and the horizontal arrows indicate the transmission and reception of data.

  In the air conditioner 101, the operating frequency f of the compressor 1 is controlled such that the condensing temperature T falls within a predetermined numerical range. That is, in the control system of the air conditioning apparatus 101 of the first embodiment, the condensation temperature T is the control amount, and the operating frequency f of the compressor 1 is the operation amount. In the first embodiment, the first data is a condensation temperature T which is a control amount, and the second data is an operation frequency f of the compressor 1 which is an operation amount. The condensation temperature T is calculated, for example, as a saturation temperature at the discharge pressure detected by the pressure sensor 201.

  When the performance of the compressor 1 is normal, the operating frequency f of the compressor 1 which is an operation amount is controlled to a predetermined numerical range such that the condensation temperature T which is a control amount is in a predetermined numerical range. Therefore, when there is an abnormality in the compressor 1, for example, when the performance of the compressor 1 is lowered, the operating frequency f of the compressor 1 is set to a predetermined value so that the condensation temperature T becomes a predetermined numerical range. It is controlled to be larger than the numerical range.

  Condition A, which is an index data group serving as an index of abnormality detection in Example 1, that is, the first target range is such that the condensation temperature T is 34 ° C. <T ≦ 36 ° C. Further, conditions B and C, which are other data groups, are such that the condensation temperature T is 36 ° C. <T ≦ 38 ° C. and 32 ° C. <T ≦ 34 ° C.

  In addition, the second past data in the first embodiment, that is, the second target range which is the numerical range of the operating frequency f of the compressor 1 in the past, is 58 Hz <f ≦ 62 Hz.

  In phase P1 of FIG. 9, it is assumed that the first data as a control amount not satisfying the condition A, for example, T = 37.0 ° C. or 33.5 ° C., is transmitted from the data transmission apparatus 102. In this case, the management system 106 classifies these first data into data groups of conditions B and C. On the other hand, since the management system 106 does not take any action on the data transmission apparatus 102, the abnormality detection process in phase P1 ends.

  In phase P2 of FIG. 9, it is assumed that the first data as a control amount that satisfies the condition A, for example, T = 35.0 ° C., is transmitted from the data transmission apparatus 102. In this case, the management system 106 classifies these first data into the data group of condition A, and the management system 106 requests the data transmission apparatus 102 to transmit the second frequency data of the operating frequency f of the compressor 1. Do. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the operating frequency f of the compressor 1 transmitted to the management system 106 is f = 60.0 Hz. In the management system 106, the acquired second data is compared with a second target range which is a numerical range of past second data, and the acquired second data is determined to be within the second target range. Ru. As a result, the second data is detected as a normal value, and the abnormality detection process in phase P2 ends.

  In phase P3 of FIG. 9, it is assumed that the first data as a control amount satisfying the condition A, for example, T = 35.5 ° C., is transmitted from the data transmission apparatus 102. In this case, the management system 106 classifies these first data into the data group of condition A, and the management system 106 requests the data transmission apparatus 102 to transmit the second frequency data of the operating frequency f of the compressor 1. Do. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the operating frequency f of the compressor 1 transmitted to the management system 106 is f = 65.0 Hz. In the management system 106, the acquired second data is compared with a second target range, which is a numerical range of past second data, and it is determined that the acquired second data is not within the second target range. Ru. As a result, the second data is detected as abnormal, and the abnormality detection process in phase P3 ends.

(Example 2)
In the air conditioning apparatus 101 during heating operation, the number of revolutions n of the outdoor blower 4, for example, the number of revolutions per minute n, is controlled such that the evaporation temperature T1 falls within a predetermined numerical range. That is, in the control system of the air conditioning apparatus 101 of the second embodiment, the evaporation temperature T1 is the control amount, and the rotational speed n of the outdoor blower 4 is the operation amount. In the second embodiment, the first data is the evaporation temperature T1, which is the control amount, and the second data is the number of revolutions n of the outdoor blower 4 which is the operation amount. The evaporation temperature T1 is calculated, for example, as a saturation temperature at the discharge pressure detected by the pressure sensor 201.

  When the performance of the outdoor blower 4 is normal, the rotational speed n of the outdoor blower 4 which is the operation amount is controlled within the predetermined numerical range such that the evaporation temperature T1 which is the control amount falls within the predetermined numerical range. Therefore, when there is an abnormality in the outdoor blower 4, for example, when the performance of the outdoor blower 4 is reduced, the number of revolutions n of the outdoor blower 4 is set to a predetermined value so that the evaporation temperature T1 becomes a predetermined numerical range. It is controlled to be larger than the numerical range.

  Condition A which is an index data group serving as an index for detecting an abnormality in Example 2, that is, a first target range, is such that the evaporation temperature T1 is −36 ° C. <T1 ≦ −34 ° C. Further, conditions B and C, which are other data groups, were such that the evaporation temperature T1 was −38 ° C. <T1 ≦ −36 ° C. and −34 ° C. <T1 ≦ −32 ° C., respectively.

  In addition, the second target data of the past second data in the second embodiment, that is, the numerical range of the number of revolutions n per minute of the outdoor fan 4 in the past is 58 <n ≦ 62.

  A case will be considered in which the first data which is a control amount not satisfying the condition A, for example, T1 = −37.0 ° C., −35.5 ° C., is transmitted from the data transmission apparatus 102. In this case, the management system 106 classifies these first data into data groups of conditions B and C, as in the case of phase P1 in FIG. On the other hand, since the management system 106 does not take any action on the data transmission apparatus 102, the abnormality detection process in this phase ends.

  A case will be considered where first data which is a control amount satisfying the condition A, for example, T1 = −35.0 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P2 in FIG. 9, the management system 106 classifies these first data into the data group of condition A, and the management system 106 is the second data to the data transmitting apparatus 102. A transmission request for the number of revolutions n of the outdoor blower 4 is made. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the rotation speed n of the outdoor blower 4 transmitted to the management system 106 is n = 60.0. In the management system 106, the acquired second data is compared with a second target range which is a numerical range of past second data, and the acquired second data is determined to be within the second target range. Ru. As a result, the second data is detected to be a normal value, and the abnormality detection process in this phase ends.

  A case will be considered in which first data which is a control amount satisfying the condition A, for example, T1 = −35.5 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P3 in FIG. 9, the management system 106 classifies these first data into the data group of condition A, and the management system 106 is the second data to the data transmitting apparatus 102. A transmission request for the number of revolutions n of the outdoor blower 4 is made. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the rotation speed n of the outdoor blower 4 transmitted to the management system 106 is n = 65.0. In the management system 106, the acquired second data is compared with the second target range, and it is determined that the acquired second data is not within the second target range. As a result, the second data is detected as abnormal, and the abnormality detection process in this phase ends.

(Example 3)
In the air conditioning apparatus 101 during the heating operation, the degree of opening D of the expansion valve 14a is controlled such that the degree of indoor supercooling T2 falls within a predetermined numerical range. In the control system of the air conditioning apparatus 101 according to the third embodiment, the degree of indoor supercooling T2 is a control amount, and the opening degree D of the expansion valve 14a is an operation amount. In the third embodiment, the first data is the indoor overcooling degree T2 which is the control amount, and the second data is the opening degree D of the expansion valve 14a which is the operation amount. Here, the opening degree D of the expansion valve 14a defines the full opening degree as 1 and the full closing opening degree as 0, and the possible range of the opening degree D is 0 ≦ D ≦ 1. The indoor overcooling degree T2 is calculated, for example, as a value obtained by subtracting the temperature detected by the temperature sensor 208a from the saturation temperature at the discharge pressure detected by the pressure sensor 201.

  When the performance of the expansion valve 14a is normal, the opening degree D of the expansion valve 14a, which is an operation amount, is controlled within a predetermined numerical range such that the degree of indoor supercooling T2, which is a control amount, becomes a predetermined numerical range. . Therefore, when the expansion valve 14a is abnormal, for example, when the expansion valve 14a is clogged, the opening degree D of the expansion valve 14a is set so that the degree of indoor supercooling T2 falls within a predetermined numerical range. It is controlled to be larger than a predetermined numerical range.

  Condition A which is an index data group serving as an index for detecting an abnormality in Example 2, that is, a first target range, is such that the degree of indoor supercooling T2 is 5 ° C. <T2 ≦ 6 ° C. Further, conditions B and C, which are other data groups, are such that the degree of indoor supercooling T2 is 6 ° C. <T2 ≦ 7 ° C. and 5 ° C. <T ≦ 6 ° C.

  In addition, the second past data in Example 3, that is, the second target range which is the numerical range of the opening degree D of the past expansion valve 14a, is 0.40 <D ≦ 0.60. .

  A case will be considered in which the first data as a control amount not satisfying the condition A, for example, T2 = 6.5 ° C., 5.1 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P1 in FIG. 9, the management system 106 classifies these first data into data groups of conditions B and C. On the other hand, since the management system 106 does not take any action on the data transmission apparatus 102, the abnormality detection process in this phase ends.

  A case will be considered in which the first data which is a control amount satisfying the condition A, for example, T2 = 5.1 ° C., is transmitted from the data transmitting apparatus 102. In this case, as in the case of phase P2 in FIG. 9, the management system 106 classifies these first data into the data group of condition A, and the management system 106 is the second data to the data transmitting apparatus 102. A transmission request for the opening degree D of the expansion valve 14a is made. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the opening degree D of the expansion valve 14a transmitted to the management system 106 is D = 0.42. In the management system 106, the acquired second data is compared to the second target range, and the acquired second data is determined to be in the second target range. As a result, the second data is detected to be a normal value, and the abnormality detection process in this phase ends.

  A case will be considered in which the first data which is a control amount satisfying the condition A, for example, T2 = 5.5 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P3 in FIG. 9, the management system 106 classifies these first data into the data group of condition A, and the management system 106 is the second data to the data transmitting apparatus 102. A transmission request for the opening degree D of the expansion valve 14a is made. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the opening degree D of the expansion valve 14a transmitted to the management system 106 is D = 0.65. In the management system 106, the acquired second data is compared with a second target range, which is a numerical range of past second data, and it is determined that the acquired second data is not within the second target range. Ru. As a result, the second data is detected as abnormal, and the abnormality detection process in this phase ends.

  As described above, the data acquisition system according to the first embodiment is connected to the air conditioning apparatus 101 including the compressor 1 and the expansion valves 14a and 14b, and a part of the parameters measured in the air conditioning apparatus 101. The second data, which is another part of the parameter measured by the air conditioner 101, is acquired from the air conditioner 101 when the first data is in the target range. The monitoring apparatus 104 acquired from the air conditioning apparatus 101 is provided.

  The data acquisition method according to the first embodiment is a data acquisition method of a data acquisition system that acquires a parameter measured in the air conditioning apparatus 101 including the compressor 1 and the expansion valves 14a and 14b. A step of acquiring, from the air conditioner 101, first data which is a part of parameters to be measured in the air conditioner 101, and the first data is measured in the air conditioner 101 when the first data is in a target range Obtaining second data, which is another part of the parameter, from the air conditioner 101.

  According to the above-described configuration, since a part of the parameters measured in the refrigeration cycle apparatus can be acquired, the capacity shortage of the data storage device 105 can be eliminated.

  In addition, the data acquisition system according to the first embodiment can be connected to the air conditioning apparatus 101 via the communication network 103. The data acquisition system according to the first embodiment can be configured to acquire a part of the parameters measured in the air conditioning apparatus 101, so that the increase in the communication capacity of the communication network 103 can be resolved. Further, by connecting the data acquisition system via the communication network 103, the data acquisition system can be configured as a remote monitoring server, so it is possible to construct a data acquisition system capable of simultaneously managing data of a large number of air conditioning apparatuses 101.

  Further, in the data acquisition system according to the first embodiment, the first data and the second data can be configured to include the parameter of the environment in the air conditioning apparatus 101 or the parameter of the operating state of the air conditioning apparatus 101. . Specifically, the parameter of the environment can be configured to include a parameter of pressure or a parameter of temperature. Also, the temperature parameters can be configured to include one or more of condensation temperature, evaporation temperature, or degree of subcooling. In addition, the parameter of the operating state can be configured to include the operating frequency of the compressor 1 or the opening degree of the expansion valves 14a and 14b. In addition, the data acquisition system according to the first embodiment can be used in the air conditioning apparatus 101 including the air-cooled heat source side heat exchanger and the outdoor blower 4 for supplying air to the air-cooled heat source side heat exchanger. The parameters of the operating state can be configured to include the number of rotations of the outdoor fan 4.

  In the first embodiment, for example, environmental parameters or operating condition parameters can be acquired as data for detecting an abnormality in the air conditioning apparatus 101. The acquired environmental parameter or operating condition parameter can be stored in the data storage device 105, and the data stored in the data storage device 105 can be stored, for example, at the time of maintenance inspection or periodic inspection of the air conditioning device 101. It can be output on paper like the graph of 8. The maintenance inspector or the periodic inspector of the air conditioning apparatus 101 can detect an abnormality from the data transition of the output graph. Specifically, the performance degradation of the compressor 1 can be detected from the data transition of the operating frequency of the compressor 1. Further, clogging of the expansion valves 14a and 14b can be detected from data transition of the opening degree of the expansion valves 14a and 14b. Moreover, the performance degradation of the outdoor blower 4 can be detected from the data transition of the rotation speed of the outdoor blower 4.

  In the data acquisition system and the data acquisition method according to the first embodiment, the data acquisition system is an example of the management system 106, and the expansion valves 14a and 14b are an example of the pressure reducing device. Is an example of a refrigeration cycle apparatus, and the monitoring apparatus 104 is an example of a control apparatus. The air-cooling type heat source side heat exchanger is an example of the outdoor heat exchanger 3, and the outdoor fan 4 is also referred to as a heat source side blower fan.

  The abnormality detection system according to the first embodiment is connected to the air conditioning apparatus 101 including the compressor 1 and the expansion valves 14a and 14b, and is a first data that is a part of parameters measured in the air conditioning apparatus 101. Is acquired from the air conditioning apparatus 101, and the second data which is another part of the parameter measured in the air conditioning apparatus 101 when the first data is in the first target range, the air conditioning apparatus The monitoring apparatus 104 is acquired from 101, and detects that the air conditioning apparatus 101 is abnormal if the second data is not in the second target range.

  Further, the abnormality detection method according to the first embodiment is an abnormality detection method of an abnormality detection system that detects an abnormality of the air conditioning apparatus 101 including the compressor 1 and the expansion valves 14a and 14b. Step of acquiring from the air conditioner 101 first data that is a part of the parameter measured in 101, and measured in the air conditioner 101 when the first data is in a first target range The step of acquiring second data, which is another part of the parameter, from the air conditioner 101, and detecting that the air conditioner 101 is abnormal when the second data is not within the second target range And a process.

  According to the above-described configuration, it is possible to detect an abnormality of the air conditioner 101 with a small amount of data that can be acquired from the air conditioner 101. Therefore, according to the first embodiment, since the amount of data used for detecting an abnormality can be significantly reduced, the capacity shortage of the data storage device 105 can be eliminated. Moreover, according to these configurations, it is possible to reduce the energy consumption consumed by the abnormality detection system for abnormality detection.

  Further, the abnormality detection system according to the first embodiment can be connected to the air conditioning apparatus 101 via the communication network 103. The abnormality detection system according to the first embodiment can be configured to acquire a part of the parameters measured in the air conditioning apparatus 101, so that the increase in the communication capacity of the communication network 103 can be resolved. Further, by connecting the abnormality detection system via the communication network 103, the abnormality detection system can be configured as a remote monitoring server, so that an abnormality detection system capable of simultaneously managing data of a large number of air conditioners 101 can be constructed.

  The abnormality detection system according to the first embodiment further includes a data storage device 105 that stores the second data acquired from the air conditioning device 101 as third data, and the monitoring device 104 includes the data storage device 105. The second target range may be determined from the third data stored in. According to this configuration, by comparing a small amount of data in time series, it is possible to detect an abnormality including a refrigerant leak, and therefore it is possible to enhance product safety and environmental conservation, and reduce environmental impact. can do.

  In the abnormality detection system according to the first embodiment, the first data includes the control amount in the air conditioner 101, the first target range is the target value of the control amount, and the second data is the target. The value may include a manipulated variable for adjusting the first data, and the second target range may be configured to be a normal manipulated variable used to adjust the first data to the target value. Specifically, in the abnormality detection system according to the first embodiment, the control amount includes the condensation temperature, the operation amount includes the operating frequency of the compressor 1, and the abnormality of the air conditioner 101 is the compressor. It can be configured to include a performance degradation of one. Further, in the abnormality detection system according to the first embodiment, the control amount includes the degree of subcooling, the operation amount includes the degree of opening of the expansion valves 14a and 14b, and the abnormality of the air conditioner 101 is the expansion valve. It can be configured to include clogs 14a, 14b. Further, the abnormality detection system according to the first embodiment can be used in the air conditioner 101 including the air-cooled heat source side heat exchanger and the outdoor blower 4 for supplying air to the air-cooled heat source side heat exchanger. The control amount includes the evaporation temperature, the operation amount includes the number of rotations of the outdoor fan 4, and the abnormality of the air conditioning apparatus 101 may include the performance deterioration of the outdoor fan 4.

  In the first embodiment, by focusing on a part of the control system of the air conditioning apparatus 101, an abnormality of the actuator of the air conditioning apparatus 101 can be detected. For example, the abnormality detection system monitors the operating frequency of the compressor 1 when the condensing temperature is controlled within a predetermined temperature range, and when the operating frequency of the compressor 1 is not within the predetermined operating frequency range, the compressor It can be configured to detect the performance degradation of 1. Further, the abnormality detection system monitors the opening degree of the expansion valves 14a and 14b when the degree of supercooling is controlled within the predetermined temperature range, and the opening degree of the expansion valves 14a and 14b is not within the predetermined opening degree range. In this case, clogging of the expansion valves 14a and 14b can be detected. Further, the abnormality detection system monitors the rotational speed of the outdoor fan 4 when the evaporation temperature is controlled within the predetermined temperature range, and when the rotational speed of the outdoor fan 4 is not within the predetermined rotational speed range, the outdoor fan It can be configured to detect the performance degradation of 4.

  In the abnormality detection system and the abnormality detection method according to the first embodiment, the abnormality detection is an example of the management system 106, the expansion valves 14a and 14b are an example of the pressure reducing device, and the air conditioner 101 is The monitoring device 104 is an example of a refrigeration cycle device. The air-cooling type heat source side heat exchanger is an example of the outdoor heat exchanger 3, and the outdoor fan 4 is also referred to as a heat source side blower fan.

  The air conditioning apparatus 101 according to the first embodiment includes a refrigeration cycle circuit including the compressor 1 and the expansion valves 14a and 14b, and a first data that is a part of parameters measured in the refrigeration cycle circuit. And a control unit 107 for acquiring, from the refrigeration cycle circuit, second data which is acquired from the circuit and the other part of the parameter measured in the refrigeration cycle circuit when the first data is in the first target range. Equipped with According to this configuration, it is possible to provide the air conditioning apparatus 101 including the control unit 107 that can perform control processing equivalent to that of the abnormality detection system according to the first embodiment.

  Further, in the air conditioning apparatus 101 according to Embodiment 1, the control unit 107 can be configured to detect that the refrigeration cycle circuit is abnormal when the second data is not within the second target range. . According to this configuration, it is possible to provide the air conditioning apparatus 101 including the control unit 107 that can perform control processing equivalent to that of the abnormality detection system according to the first embodiment.

  The air conditioning apparatus 101 according to the first embodiment is an example of a refrigeration cycle apparatus, the expansion valves 14a and 14b are an example of a pressure reducing apparatus, and the control unit 107 is an example of a control apparatus.

Second Embodiment
The above-mentioned Embodiment 1 demonstrated the case where the air-cooling-type air conditioning apparatus 101 which made the outdoor heat exchanger 3 the air-cooling-type heat source side heat exchanger was comprised. In the second embodiment of the present invention, a case of forming a water-cooled air conditioner 101 in which the outdoor heat exchanger 3 is a water-cooled heat source side heat exchanger will be described. For example, as the heat source unit 304 of the water-cooled air conditioner 101, there is a water-cooled chiller unit or the like.

  FIG. 10 is a refrigerant circuit diagram showing an example of a schematic configuration of the air conditioning apparatus 101 according to the second embodiment. In the air conditioning apparatus 101 according to the second embodiment, a water cooling type is another example of the outdoor heat exchanger 3 instead of the air-cooling type heat source side heat exchanger and the outdoor blower 4 which are an example of the outdoor heat exchanger 3. A heat source side heat exchanger and a water cooling pump 305 connected to the water cooling type heat source side heat exchanger are provided. The water-cooled heat source side heat exchanger and the water-cooling pump 305 are connected by piping to constitute a water-cooling circuit for circulating water or brine. Further, although not shown, a cooling tower installed outdoors is connected to the water cooling circuit to cool the water or brine directly or indirectly by contacting the atmosphere with the atmosphere.

  The water-cooled heat source side heat exchanger can be configured to exchange heat between the refrigerant flowing through the inside of the refrigeration cycle circuit and water or brine circulated in the water cooling circuit by the water cooling pump 305. The water-cooled heat source side heat exchanger can be configured as, for example, a shell-and-tube type or a double tube coil type heat exchanger.

  In a water-cooled circuit, a temperature sensor that detects the temperature of the cooling water of water or brine flowing through the inlet side of the water-cooled heat source side heat exchanger through the piping on the inlet side of the water-cooled heat source side heat exchanger 220 are provided. In the water cooling circuit, the temperature of the cooling water of water or brine flowing through the outlet side of the water cooling circuit side of the water cooling heat source side heat exchanger is detected through the piping on the outlet side of the water cooling heat source side heat exchanger. A temperature sensor 221 is provided. The temperature sensors 220 and 221 are configured using, for example, a thermistor or the like.

  The water cooling pump 305 is a fluid machine that sucks in water or brine from the cooling tower and presses the sucked water or brine into the water cooled heat source side heat exchanger. The water cooling pump 305 is configured to be able to adjust the flow rate of water or brine by the current. The water cooling pump 305 is, for example, a DC pump whose capacity can be controlled by the amount of current flowing through the motor.

  The amount of current flowing through the motor that drives the water cooling pump 305 is detected by the current sensor 240. The current sensor 240 can be configured using, for example, a Hall element. The current sensor 240 is configured to output a detection signal to the control unit 107.

  The other configuration of the air conditioning apparatus 101 in the second embodiment is the same as the configuration described in the first embodiment.

  Next, in the second embodiment, transmission and reception of data between the data transmission apparatus 102 and the management system 106 and an example of abnormality detection in the management system 106 when the management system 106 is configured as an abnormality detection system will be described. Do.

  The following example is the first data, the second data, the condition A which is an index data group serving as an indicator of abnormality detection, and the other data groups described in the control process of FIG. 7 of the first embodiment described above. Certain conditions B and C, and the numerical range of the second past data are specified concretely. As described in the control process of FIG. 7, the condition A corresponds to the first target range, and the conditions B and C are data groups outside the first target range. In addition, the numerical value range of the past second data corresponds to the second target range determined from the third data stored in the storage device 140.

  Further, in the following example, the first data corresponds to the control amount in the air conditioning apparatus 101. The first target range corresponds to the target value of the control amount in the air conditioning apparatus 101. The second data corresponds to the operation amount for adjusting the first data to the target value of the control amount in the air conditioning apparatus 101. The second target range is a normal operation amount used to adjust the first data to the target value of the control amount in the air conditioning apparatus 101.

  In the air conditioner 101 during the cooling operation, the current value I of the motor driving the water cooling pump 305 is the inlet / outlet temperature of the water-cooled heat source side heat exchanger, that is, the inlet of the water cooling circuit side of the water-cooled heat source side heat exchanger The temperature difference .DELTA.T3 between C. and the outlet is controlled to be within a predetermined numerical range. That is, in an example of the control system of the air conditioner 101 of the second embodiment, the temperature difference ΔT3 between the inlet and the outlet of the water cooling circuit side of the water cooling heat source side heat exchanger becomes a control amount, and the motor The current value I of is the manipulated variable. In the second embodiment, the first data is a temperature difference ΔT3 between the inlet and the outlet on the water cooling circuit side of the water-cooled heat source side heat exchanger as a control amount, and the second data is an operation amount. The current value I of a certain motor was used. The temperature difference ΔT3 between the inlet and the outlet of the water cooling circuit side of the water cooling type heat source side heat exchanger is calculated, for example, as the difference between the temperature detected by the temperature sensor 220 and the temperature detected by the temperature sensor 221 Be done. Further, the current value I of the motor is detected by the current sensor 240. Hereinafter, the “temperature difference ΔT3 between the inlet and the outlet of the water cooling circuit side of the water-cooled heat source side heat exchanger” will be referred to as the “temperature difference ΔT3”.

  When the performance of the water cooling pump 305 is normal, the current value I of the motor, which is the operation amount, is controlled within the predetermined numerical range such that the temperature difference ΔT3 which is the control amount falls within the predetermined numerical range. Therefore, when there is an abnormality in the water cooling pump 305, for example, when the water cooling circuit is clogged, the motor current value I is greater than the predetermined numerical range so that the temperature difference ΔT3 falls within the predetermined numerical range. Is also controlled to be large.

  The condition A which is an index data group which is an index of abnormality detection in the second embodiment, that is, the first target range, is such that the temperature difference ΔT3 is 5.0 ° C. <ΔT3 ≦ 7.0 ° C. Further, conditions B and C, which are other data groups, are such that the temperature difference ΔT3 is 7.0 ° C. <ΔT3 ≦ 9.0 ° C. and 3.0 ° C. <ΔT3 ≦ 5.0 ° C.

  In addition, the second past data in the second embodiment, that is, the second target range, which is the numerical range of the past motor current value I, is 0.5A <I ≦ 1.0A. .

  A case will be considered in which the first data as a control amount not satisfying the condition A, for example, ΔT3 = 8.0 ° C. and 4.3 ° C., is transmitted from the data transmitting apparatus 102. In this case, the management system 106 classifies these first data into data groups of conditions B and C, as in the case of the phase P1 of FIG. 9 in the first embodiment described above. On the other hand, since the management system 106 does not take any action on the data transmission apparatus 102, the abnormality detection process in this phase ends.

  A case will be considered in which first data which is a control amount satisfying the condition A, for example, ΔT 3 = 6.0 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P2 of FIG. 9 in the first embodiment described above, the management system 106 classifies these first data into the data group of condition A, and the management system 106 transmits the data transmission apparatus 102. Requests transmission of the current value I of the motor, which is the second data. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the motor current value I transmitted to the management system 106 is I = 0.8A. In the management system 106, the acquired second data is compared with a second target range which is a numerical range of past second data, and the acquired second data is determined to be within the second target range. Ru. As a result, the second data is detected to be a normal value, and the abnormality detection process in this phase ends.

  A case will be considered in which first data which is a control amount satisfying the condition A, for example, ΔT 3 = 6.5 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P3 in FIG. 9, the management system 106 classifies these first data into the data group of condition A, and the management system 106 is the second data to the data transmitting apparatus 102. A transmission request for the motor current value I is made. In response to the transmission request, the data transmission apparatus 102 transmits, to the management system 106, second data which is an operation amount. Here, it is assumed that the motor current value I transmitted to the management system 106 is I = 1.5A. In the management system 106, the acquired second data is compared with the second target range, and it is determined that the acquired second data is not within the second target range. As a result, the second data is detected as abnormal, and the abnormality detection process in this phase ends.

  When the management system 106 is configured as a data acquisition system, the motor current value I or the temperature difference ΔT3 can be acquired as data for detecting an abnormality in the water cooling pump 305 by the same method.

  As described above, the data acquisition system according to the second embodiment includes the water-cooled heat source side heat exchanger and the water-cooling pump 305 connected to the water-cooled heat source side heat exchanger, and the water-cooled heat source side heat exchange And the water cooling pump 305 can be used in the air conditioner 101 constituting a water cooling circuit that circulates water or brine, and the temperature parameters are the inlet and the outlet of the water cooling circuit side of the water cooling heat source side heat exchanger And the parameters of the operating conditions can be configured to include a measurement of the current driving the water cooling pump 305.

  According to this configuration, the data acquisition system according to the second embodiment can acquire, for example, the current value I of the motor or the temperature difference ΔT3 as data for detecting an abnormality in the water cooling pump 305. The acquired motor current value I or temperature difference ΔT3 can be stored in the data storage device 105, and the data stored in the data storage device 105 is, for example, at the time of maintenance inspection or periodic inspection of the air conditioning device 101. As shown in the graph of FIG. The maintenance inspector or the periodic inspector of the air conditioning apparatus 101 can detect an abnormality from the data transition of the output graph. That is, the clogging of the water cooling circuit can be detected from the data transition of the current value I of the motor.

  Further, the abnormality detection system according to the second embodiment includes a water-cooled heat source side heat exchanger and a water-cooling pump 305 connected to the water-cooled heat source side heat exchanger, and the water-cooled heat source side heat exchanger and the water cooling The pump 305 can be used in the air conditioner 101 constituting a water cooling circuit that circulates water or brine, and the control amount is set between the inlet and the outlet of the water cooling circuit side of the water cooled heat source side heat exchanger. The temperature difference may be included, the operation amount may include the measurement value of the current that drives the water cooling pump 305, and the abnormality of the air conditioning apparatus 101 may include the clogging of the water cooling circuit.

  According to this configuration, even if the air conditioning apparatus 101 is of the water cooling type, it is possible to detect an abnormality unique to the water cooling type air conditioning apparatus 101 using the abnormality detection system.

  In the data acquisition system and the abnormality detection system according to the second embodiment, the data acquisition system and the abnormality detection system are an example of the management system 106, and the air conditioning apparatus 101 is an example of the refrigeration cycle apparatus. The water-cooled heat source side heat exchanger is an example of the outdoor heat exchanger 3.

Third Embodiment
In the above-mentioned Embodiment 1 and the above-mentioned Embodiment 2, the apparatus which comprises the air conditioning apparatus 101, ie, the management system 106 which acquires the parameter which shows the driving | running state of an actuator as 2nd data, was demonstrated with a specific example. In the third embodiment of the present invention, a management system 106 that acquires a parameter indicating a temperature state as second data will be described together with a specific example.

  In the following, transmission and reception of data between the data transmission apparatus 102 and the management system 106 and an example of abnormality detection in the management system 106 when the management system 106 according to the third embodiment is configured as an abnormality detection system will be described. .

  The following example is the first data, the second data, the condition A which is an index data group serving as an indicator of abnormality detection, and the other data groups described in the control process of FIG. 7 of the first embodiment described above. Certain conditions B and C, and the numerical range of the second past data are specified concretely. As described above in the control process, the condition A corresponds to the first target range, and the conditions B and C are data groups outside the first target range. In addition, the numerical value range of the past second data corresponds to the second target range determined from the third data stored in the storage device 140.

  In the air conditioning apparatus 101, the entire system of the air conditioning apparatus 101 is controlled such that the degree of subcooling T5 is in a constant temperature range when the condensation temperature T4 is in a constant temperature range. In the third embodiment, the first data is a condensation temperature T4, and the second data is a subcooling degree T5. The condensation temperature T4 is calculated, for example, as a saturation temperature at the discharge pressure detected by the pressure sensor 201. The degree of subcooling T5 is calculated, for example, as a value obtained by subtracting the temperature detected by the temperature sensor 207 from the saturation temperature at the discharge pressure detected by the pressure sensor 201 during the cooling operation. Further, during the heating operation, the subcooling degree T5 is calculated, for example, as a value obtained by subtracting the detection temperature of the temperature sensor 208a or the temperature sensor 208b from the saturation temperature at the discharge pressure detected by the pressure sensor 201.

  When there is no refrigerant leakage from the air conditioning apparatus 101, when the condensation temperature T4 falls within a certain range, the degree of subcooling T5 falls within a certain range. On the other hand, when there is a refrigerant leak from the air conditioning apparatus 101, the degree of subcooling T5 goes out of a certain range and increases because of the refrigerant shortage.

  Condition A which is an index data group which is an index of abnormality detection in the third embodiment, that is, a first target range, is such that the condensation temperature T4 is 34 ° C. <T ≦ 36 ° C. Further, conditions B and C, which are other data groups, are such that the condensation temperature T4 is 36 ° C. <T ≦ 38 ° C. and 32 ° C. <T ≦ 34 ° C.

  Further, the second past data in the third embodiment, that is, the second target range which is the numerical range of the past degree of supercooling T5, is 5 ° C. <T4 ≦ 6 ° C.

  Consider the case where the first data that does not satisfy the condition A, for example, T4 = 37.5 ° C. and 33.5 ° C., is transmitted from the data transmission apparatus 102. In this case, the management system 106 classifies these first data into data groups of conditions B and C, as in the case of the phase P1 of FIG. 9 in the first embodiment described above. On the other hand, since the management system 106 does not take any action on the data transmission apparatus 102, the abnormality detection process in this phase ends.

  Consider the case where the first data satisfying the condition A, for example, T4 = 35.0 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P2 of FIG. 9 in the first embodiment described above, the management system 106 classifies these first data into the data group of condition A, and the management system 106 transmits the data transmission apparatus 102. Request the transmission of the subcooling degree T5, which is the second data. The data transmission apparatus 102 transmits the second data to the management system 106 in response to the transmission request. Here, it is assumed that the degree of subcooling T5 transmitted to the management system 106 is T5 = 5.5.degree. In the management system 106, the acquired second data is compared with a second target range which is a numerical range of past second data, and the acquired second data is determined to be within the second target range. Ru. As a result, the second data is detected to be a normal value, and the abnormality detection process in this phase ends.

  Consider the case where the first data satisfying the condition A, for example, T4 = 35.0 ° C., is transmitted from the data transmission apparatus 102. In this case, as in the case of phase P3 in FIG. 9, the management system 106 classifies these first data into the data group of condition A, and the management system 106 is the second data to the data transmitting apparatus 102. A transmission request for the subcooling degree T5 is made. The data transmission apparatus 102 transmits the second data to the management system 106 in response to the transmission request. Here, it is assumed that the subcooling degree T5 transmitted to the management system 106 is T5 = 7.0.degree. In the management system 106, the acquired second data is compared with the second target range, and it is determined that the acquired second data is not within the second target range. As a result, the second data is detected as abnormal, and the abnormality detection process in this phase ends.

  As described above, in the abnormality detection system according to the third embodiment, the first data includes the condensing temperature, and the first target range is the allowable range of the condensing temperature in the air conditioning apparatus 101. The data in No. 2 includes the degree of subcooling, and the second target range can be configured to be the allowable range of the degree of subcooling at the condensing temperature, and the refrigerant leaks from the air conditioner 101 as an abnormality of the air conditioner 101. Can be configured to detect

  According to this configuration, refrigerant leakage from the air conditioning apparatus 101 can be detected from the degree of supercooling when the condensing temperature is in a certain range, so the amount of data acquired from the air conditioning apparatus 101 is reduced. Can also be configured to be able to detect a refrigerant leak from the air conditioner 101.

  When the management system 106 is configured as a data acquisition system, the condensation temperature T4 or the degree of subcooling T5 can be acquired as data for detecting a refrigerant leak from the air conditioning apparatus 101 by the same method.

  In the data acquisition system and the abnormality detection system according to the third embodiment, the data acquisition system and the abnormality detection system are an example of the management system 106, and the air conditioning apparatus 101 is an example of the refrigeration cycle apparatus.

Fourth Embodiment
In the fourth embodiment of the present invention, a process of determining a numerical range, for example, a division width, for classifying the first data into a plurality of data groups in the management system 106 according to the first to third embodiments described above will be described. . FIG. 11 is a flowchart illustrating an example of a process of determining a numerical range for classifying the first data into a plurality of data groups in the management system 106 according to the fourth embodiment. The process shown in FIG. 11 may be performed only once at the time of performing the process of step S2 of FIG. 5, or may be performed periodically, for example, once a year, to determine an optimal numerical range. It may be done to

  Step S21 in FIG. 11 is a step of acquiring the first data from the air conditioning apparatus 101, and is the same processing as step S1 in FIG. 5 and step S11 in FIG. 7 according to the above-mentioned Embodiment 1.

  Step S22 is a step of classifying the first data transmitted to the management system 106 into a plurality of data groups, and the same processing as step S2 of FIG. 5 and step S12 of FIG. 7 according to the above-described first embodiment. It is.

  Step S23 is a step of selecting an index data group to be a target range from the plurality of stored data groups, and is the same as step S3 in FIG. 5 and step S13 in FIG. 7 according to the first embodiment. Processing.

  In step S24, the control unit 121 of the monitoring device 104 in the management system 106 calculates the dispersion, that is, the dispersion of the index data group when classified in the current numerical range. The dispersion of the index data group can be, for example, the standard deviation or standard error of the index data group. The control unit 121 of the monitoring device 104 may cause the calculation unit 120 to calculate the variation of the index data.

  In step S25, the control unit 121 of the monitoring apparatus 104 determines whether the variation of the index data calculated in step S24 is smaller than the reference value of the variation. The reference value of variation is arbitrarily determined according to the attribute of the first data. For example, if the first data is the condensation temperature T in the first example of the first embodiment described above, and the variation of the index data is the standard deviation of the index data group, the reference value of the variation is 35 ± 0.5. It is good also as ° C.

  If it is determined in step S25 that the variation in the index data is equal to or greater than the reference value of the variation, then in step S26, the control unit 121 of the monitoring apparatus 104 performs numerical range of a plurality of data groups so that the numerical range becomes smaller. Change The change of the numerical range can be performed with a predetermined width. For example, when the first data is the condensation temperature T of the first example of the first embodiment described above, the upper limit value and the lower limit value of the numerical range may be changed by 0.05 ° C. to reduce the numerical range. it can. Thereafter, in step S22, the step of classifying the first data transmitted to the management system 106 into a plurality of data groups for each changed numerical range is performed again, and in step S25, the index data calculated in step S24. Steps S22 to S26 are repeatedly performed until it is determined that the variation of is smaller than the reference value of the variation.

  If it is determined in step S25 that the variation of the index data calculated in step S24 is smaller than the reference value of the variation, then in step S27, the numerical range for classifying the first data into a plurality of data groups is currently The numerical range of

  According to the fourth embodiment, by performing such a determination process, it is possible to dynamically determine the optimum numerical range corresponding to the attribute of the first data, and thus all the data that can be acquired from the refrigeration cycle apparatus With a small amount of data selected from the above, abnormalities in the refrigeration cycle apparatus can be accurately detected.

Other Embodiments
The present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-mentioned embodiment, although the Internet circuit was mentioned as an example as communication network 103, LAN or WAN can also be used as communication network 103.

  In the second embodiment described above, the numerical range is changed according to the variation of the index data, for example, the standard deviation, and the optimum numerical range is determined. However, the numerical range is the occurrence rate of the first data That is, it may be changed according to the frequency of occurrence to determine the optimum numerical range.

  Moreover, in the said embodiment, although the air conditioning apparatus 101 was mentioned as the example as a refrigerating-cycle apparatus, this invention is applicable also to other refrigerating-cycle apparatuses, such as a hot-water supply apparatus, a refrigerator, a refrigerator, a vending machine.

  Reference Signs List 1 compressor, 2 four-way valve, 3 outdoor heat exchanger, 4 outdoor fan, 11 supercooling heat exchanger, 14a, 14b expansion valve, 15a, 15b indoor heat exchanger, 19 accumulator, 20 bypass pressure reducing mechanism, 21 bypass circuit , 27 liquid piping, 28 gas piping, 101 air conditioner, 102 data transmission device, 103 communication network, 104 monitoring device, 105 data storage device, 106 management system, 107 control unit, 108 property, 120 operation unit, 121 control unit , 122 communication unit, 123 display unit, 140 storage device, 141 communication unit, 142 storage unit, 201, 211 pressure sensor, 202, 203, 204, 207, 208a, 208b, 209a, 209b, 210a, 210b, 212, 213 , 214, 220, 221 temperature sensor, 24 0 current sensor, 303a, 303b utilization unit, 304 heat source unit, 305 water cooling pump.

Claims (6)

Connected to a refrigeration cycle apparatus comprising a compressor and a pressure reducing device,
First data including a degree of subcooling which is a part of a parameter measured in the refrigeration cycle apparatus and is a control amount is acquired from the refrigeration cycle apparatus;
When the degree of supercooling is in a first target range which is a target value of the degree of supercooling in the refrigeration cycle apparatus, it is another part of the parameter measured in the refrigeration cycle apparatus, and the target value is Second data including an opening degree of the pressure reducing device, which is an operation amount for adjusting the degree of supercooling, is acquired from the refrigeration cycle device;
When the opening degree of the pressure reducing device is not within a second target range, which is a normal operation amount used to adjust the degree of supercooling to the target value, the pressure reducing device as an abnormality of the refrigeration cycle device An anomaly detection system that includes a controller that detects a blockage of Connected to the refrigeration cycle apparatus via a communication network
The abnormality detection system according to claim 1. The data storage device further stores the second data acquired from the refrigeration cycle device as third data.
The abnormality detection system according to claim 1, wherein the control device determines the second target range from the third data stored in the data storage device. A refrigeration cycle circuit comprising a compressor and a pressure reducing device;
First data including a degree of subcooling which is a part of a parameter measured in the refrigeration cycle circuit and is a control amount is acquired from the refrigeration cycle circuit;
When the degree of supercooling is in a first target range that is a target value of the degree of supercooling in the refrigeration cycle circuit, the second part is another part of the parameter measured in the refrigeration cycle circuit, and the target value is Second data including an opening degree of the pressure reducing device, which is an operation amount for adjusting the degree of supercooling, is acquired from the refrigeration cycle circuit,
When the opening degree of the pressure reducing device is not within a second target range which is a normal operation amount used to adjust the degree of subcooling to the target value, the pressure reducing device as an abnormality of the refrigeration cycle circuit A refrigeration cycle apparatus comprising: The data storage device further stores the second data acquired from the refrigeration cycle device as third data.
The refrigeration cycle apparatus according to claim 4, wherein the control device determines the second target range from the third data stored in the data storage device. An abnormality detection method for an abnormality detection system, which detects an abnormality in a refrigeration cycle apparatus including a compressor and a pressure reducing device, comprising:
Acquiring from the refrigeration cycle apparatus first data including a degree of subcooling which is a part of a parameter measured in the refrigeration cycle apparatus and is a control amount;
When the degree of supercooling is in a first target range which is a target value of the degree of supercooling in the refrigeration cycle apparatus, it is another part of the parameter measured in the refrigeration cycle apparatus, and the target value is Acquiring, from the refrigeration cycle apparatus, second data including an opening degree of the pressure reducing device, which is an operation amount for adjusting the degree of supercooling;
When the opening degree of the pressure reducing device is not within a second target range, which is a normal operation amount used to adjust the degree of supercooling to the target value, the pressure reducing device as an abnormality of the refrigeration cycle device And c) detecting a clogged block.

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