JP6636192B2 - Abnormality detection system, refrigeration cycle device, and abnormality detection method - Google Patents

Description

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

  Patent Literature 1 describes a refrigeration cycle device such as an air conditioner. In this refrigeration cycle apparatus, the refrigerant amount of each component is obtained from the operation state amount of each component constituting the refrigerant circuit, and the calculated refrigerant amount is calculated as the sum of the amounts. Also, by comparing the calculated refrigerant amount with a previously acquired proper refrigerant amount, it is determined whether the refrigerant amount is excessive or insufficient.

Japanese Patent No. 4975052

  However, in the refrigeration cycle apparatus described in Patent Literature 1, since the calculated refrigerant amount is calculated based on the operation state amount of each component of the refrigerant circuit, a large amount of data is remotely transmitted to detect an abnormality in the refrigerant amount. Must be remembered by the surveillance system. Therefore, in Patent Literature 1, there is a problem that a remote monitoring system capable of accumulating a large amount of data is required in order to detect an abnormality of the refrigeration cycle device including an abnormality of the refrigerant amount. Further, in Patent Literature 1, since the refrigeration cycle device and the remote monitoring system are connected via a communication network, the communication capacity is limited. Therefore, in Patent Literature 1, there is a problem that a large amount of data cannot always be transmitted from the refrigeration cycle apparatus to the remote monitoring system in order to detect an abnormality of the refrigeration cycle apparatus.

  The present invention has been made to solve the above-described problems, and has an abnormality detection system capable of reducing the amount of data acquired from a refrigeration cycle device, a refrigeration cycle device including the above-described system, and a refrigeration cycle device. It is an object of the present invention to provide an abnormality detection method capable of reducing the amount of data acquired from a device.

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

  The refrigeration cycle device according to the present invention includes a refrigeration cycle circuit including a compressor and a decompression device, and first data including a degree of supercooling, which is a control amount, which is a part of a parameter measured in the refrigeration cycle circuit. Another parameter obtained from the refrigeration cycle circuit and measured in the refrigeration cycle circuit when the degree of supercooling is within a first target range that is a target value of the degree of supercooling in the refrigeration cycle circuit. A second data including an opening degree of the pressure reducing device, which is an operation amount for adjusting the degree of supercooling to the target value, is obtained from the refrigeration cycle circuit, and the opening degree of the pressure reducing device is When the refrigerating cycle circuit is not in the second target range, which is a normal operation amount used to adjust the degree of subcooling to the target value, the clogging of the pressure reducing device is detected. And a that controller.

  Further, the 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 device including a compressor and a pressure reducing device, wherein one of parameters measured in the refrigeration cycle device is included. Obtaining from the refrigeration cycle apparatus first data that is a part and includes a degree of supercooling as a control amount, and a first target in which the degree of supercooling is a target value of the degree of supercooling in the refrigeration cycle apparatus. The second data, which is another part of the parameter measured in the refrigeration cycle device when in the range, includes the opening degree of the pressure reducing device, which is an operation amount for adjusting the degree of supercooling to the target value. From the refrigeration cycle apparatus, and the degree of opening of the pressure reducing apparatus falls within a second target range that is a normal operation amount used to adjust the degree of subcooling 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, the configuration can be such that a part of the parameters measured by the refrigeration cycle apparatus is acquired, so that the amount of data acquired from the refrigeration cycle apparatus can be reduced.

FIG. 2 is a refrigerant circuit diagram illustrating an example of a schematic configuration of an air-conditioning apparatus 101 according to Embodiment 1 of the present invention. FIG. 3 is a schematic diagram showing an example of connection of the management system 106 to the air-conditioning apparatus 101 according to Embodiment 1 of the present invention. FIG. 2 is a block diagram illustrating a configuration of a monitoring device 104 in the management system 106 according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing a configuration of a data storage device 105 in the management system 106 according to Embodiment 1 of the present invention. 5 is a flowchart illustrating an example of a control process executed by the monitoring device when the management system according to the first embodiment of the present invention is configured as a data acquisition system. FIG. 3 is a block diagram schematically showing an example of a step of classifying first data into a plurality of data groups according to Embodiment 1 of the present invention. 6 is a flowchart illustrating an example of a control process executed by the monitoring device when the management system according to the first embodiment of the present invention is configured as an abnormality detection system. 5 is a graph schematically illustrating an example of abnormality detection in the control unit 121 of the monitoring device 104 when the management system 106 according to Embodiment 1 of the present invention is configured as an abnormality detection system. 3 schematically shows an example of data transmission and reception between the data transmitting apparatus 102 and the management system 106 in the control processing according to the first embodiment of the present invention. FIG. 7 is a refrigerant circuit diagram illustrating an example of a schematic configuration of an air-conditioning apparatus 101 according to Embodiment 2 of the present invention. 15 is a flowchart illustrating an example of a process of determining a numerical range for classifying first data into a plurality of data groups in a management system 106 according to Embodiment 4 of the present invention.

Embodiment 1 FIG.
A refrigeration cycle device connected to the management system 106 according to Embodiment 1 of the present invention will be described. For the management system 106, see FIG. 2 described later. Although 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 illustrating an example of a schematic configuration of the air-conditioning apparatus 101 according to Embodiment 1. In the first embodiment, an air conditioner 101 is exemplified as a refrigeration cycle device. The air conditioner 101 according to Embodiment 1 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 execute 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 conditioner 101 has a refrigeration cycle circuit for circulating 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 via a refrigerant pipe. Connected. 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 the 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, and the expansion valve 14b And the outdoor heat exchanger 3 is connected in a ring shape in this order.

  In addition, the air conditioner 101 has a bypass circuit 21 that returns a 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 diverted to the bypass circuit 21. Further, the air conditioner 101 has a subcooling heat exchanger 11 that cools 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 depressurization mechanism 20. are doing.

  The air-conditioning apparatus 101 has, for example, one heat source unit 304 installed outdoors and a plurality of use units 303a and 303b installed indoors and connected in parallel to the heat source unit 304, for example. ing. The heat source unit 304 and the use units 303a and 303b are connected via the liquid pipe 27 and the gas pipe 28. The liquid pipe 27 and the gas pipe 28 are extension pipes that connect between the heat source unit 304 and the use units 303a and 303b, and are a part of a refrigerant pipe that forms a refrigeration cycle. Although FIG. 1 shows one heat source unit 304 and two use units 303a and 303b, the air conditioner 101 may have two or more heat source units 304 or one heat source unit 304. Only, or three or more other use units may be provided. The heat source unit 304 is an example of an indoor unit. The use units 303a and 303b are examples of an indoor unit, 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 supercooling heat exchanger 11, the bypass pressure reducing mechanism 20, and the like. Further, the heat source unit 304 houses an outdoor blower 4 that blows outside air to the outdoor heat exchanger 3.

  The utilization unit 303a houses the expansion valve 14a and the indoor heat exchanger 15a. Although not shown, the use unit 303a contains an indoor blower that blows air to the indoor heat exchanger 15a. Similarly, although not shown, the utilization unit 303b contains an expansion valve 14b, an indoor heat exchanger 15b, and an indoor blower that blows air to the indoor heat exchanger 15b.

  The compressor 1 is a fluid machine that compresses the sucked low-pressure refrigerant and discharges the compressed low-pressure refrigerant as high-pressure refrigerant. In the compressor 1 according to the first embodiment, the rotation speed is controlled by an inverter.

  The four-way valve 2 is an example of a refrigerant flow switching device, and is a valve that switches the flow direction of the refrigerant between a cooling operation and a 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 communicate with each other and the third port and the fourth port communicate with each other as shown by the solid line in FIG. During the 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 called a heat source side heat exchanger, and functions as a condenser during the cooling operation and functions as an evaporator during the heating operation. As shown in FIG. 1, the outdoor heat exchanger 3 is configured as, for example, an air-cooled heat source side heat exchanger in which heat exchange is performed between a refrigerant flowing inside and air blown by the outdoor blower 4, that is, outside air. it can. The air-cooled heat source-side heat exchanger can be configured as, for example, a cross-fin type fin-and-tube heat exchanger including a heat transfer tube and a plurality of fins. The condenser is also called a radiator, and the evaporator is also called 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 functions to prevent a large amount of liquid refrigerant from flowing into the compressor 1 by retaining a refrigerant storage function of storing excess refrigerant and a liquid refrigerant that is temporarily generated when the operation state changes. A liquid separation function.

  The expansion valves 14a and 14b are, for example, electronic expansion valves whose opening 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 examples of a decompression device, and another decompression device such as a capillary can be used instead of the expansion valves 14a and 14b.

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

  The air conditioner 101 has 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 drawn into the compressor 1 211 are provided. Each of the pressure sensors 201 and 211 outputs a detection signal to the control unit 107 described later.

  Further, the air conditioner 101 is provided with a plurality of temperature sensors that detect the temperature of the refrigerant in the refrigeration cycle directly or indirectly via a refrigerant pipe 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, that is, the outdoor heat exchanger 3 during the cooling operation. A temperature sensor 203 for detecting the temperature of the liquid refrigerant flowing out of the heat exchanger, the temperature of the liquid refrigerant flowing into the outdoor heat exchanger 3 during the heating operation, or the temperature of the two-phase refrigerant, and the high-pressure side flow path of the supercooling heat exchanger 11 and the liquid pipe 27. A temperature sensor 207 for detecting the temperature of the refrigerant between them, a temperature sensor 212 for detecting the temperature of the refrigerant between the bypass pressure reducing mechanism 20 and the low-pressure side flow path of the supercooling heat exchanger 11, And a temperature sensor 213 for detecting the temperature of the refrigerant on the outlet side of the low-pressure side flow path. The use unit 303a is provided with temperature sensors 208a and 209a for detecting the temperatures of the refrigerant on the inlet side and the outlet side of the indoor heat exchanger 15a. Similarly, the use unit 303b is provided with temperature sensors 208b and 209b for detecting the temperatures 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 for detecting the temperature of the bottom of the compressor 1 and a temperature sensor 204 for detecting the ambient temperature such as the outside air temperature of the heat source unit 304. The use unit 303a is provided with a temperature sensor 210a for detecting an ambient temperature such as an indoor temperature of the use unit 303a. The use unit 303b is provided with a temperature sensor 210b for detecting an ambient temperature such as an indoor temperature of the use unit 303b.

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

  The control unit 107 performs at least a refrigeration cycle based on detection signals 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. It controls the operation state of the air conditioner 101 including the operation and stop of the air conditioner. In addition, the control unit 107 controls the pressure and temperature data acquired based on the detection signals from the 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 data transmission device 102 may be configured to transmit data indicating the / stop state and operation data for each unit period of the air conditioner 101, for example, every day. For example, the data transmitted from the control unit 107 to the data transmission device 102 includes data on the pressure and temperature of the refrigerant in the refrigeration cycle, data on the bottom temperature of the compressor 1 of the refrigeration cycle, and data on the ambient temperature of the heat source unit 304. , The ambient temperature data of the use units 303a and 303b, and the like.

  Next, the operation of the air conditioner 101 will be described. The control unit 107 controls the devices mounted on the heat source unit 304 and the usage units 303a and 303b based on the requests 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 four-way valve 2 is controlled such that the discharge side of the compressor 1 and the outdoor heat exchanger 3 are connected, and 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 between the refrigerant flowing inside and the outside air blown by the outdoor blower 4 is performed, and the heat of condensation of the refrigerant is radiated to the blown air. Thereby, the refrigerant flowing into the outdoor heat exchanger 3 is condensed and becomes a high-pressure liquid refrigerant. The high-pressure liquid refrigerant is cooled by heat exchange with the low-pressure refrigerant in the supercooling heat exchanger 11. After that, a 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 reduced in pressure by the expansion valves 14a and 14b to become a low-pressure two-phase refrigerant. The low-pressure two-phase refrigerant that has 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 evaporators. That is, in the indoor heat exchangers 15a and 15b, heat exchange between the refrigerant flowing inside and the indoor air blown by the indoor blower is performed, and the heat of evaporation of the refrigerant is absorbed from the blown air. Thereby, 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 blower is cooled by the heat absorbing action of the refrigerant, and becomes cool air. The low-pressure gas refrigerant or the two-phase refrigerant that has passed through the indoor heat exchangers 15a and 15b 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 sucked 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 so that the evaporation temperature becomes a predetermined value. The evaporation temperature is the saturation temperature at the suction pressure detected by the pressure sensor 211. The outdoor blower 4 is controlled so 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 so that the degree of bypass superheat 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 so that the degree of indoor superheating 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 so that the indoor superheat degree, 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 supercooling degree becomes a certain temperature range when the condensing temperature is within a certain 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 four-way valve 2 is controlled such that the discharge side of the compressor 1 is connected to the gas pipe 28 and the suction side of the compressor 1 is connected to the outdoor heat exchanger 3.

  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 condensers. That is, in the indoor heat exchangers 15a and 15b, heat exchange between the refrigerant flowing inside and the indoor air blown by the indoor blower is performed, and the heat of condensation of the refrigerant is radiated to the blown air. Thereby, the refrigerant flowing into the indoor heat exchangers 15a and 15b is condensed and becomes a high-pressure liquid refrigerant. In addition, the air blown by the indoor blower is heated by the heat radiating action of the refrigerant, and becomes hot air. The high-pressure liquid refrigerant condensed in the indoor heat exchangers 15a and 15b is reduced in pressure by the expansion valves 14a and 14b to become a low-pressure two-phase refrigerant.

  The low-pressure two-phase refrigerant that has 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 between the refrigerant flowing inside and the outside air blown by the outdoor blower 4 is performed, and the heat of evaporation of the refrigerant is absorbed from the blown air. Thereby, the refrigerant flowing 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 sucked into the compressor 1 and compressed to become a high-temperature and high-pressure gas refrigerant. In the heating operation, these cycles are repeated.

  During the heating operation, the compressor 1 is controlled so 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 so that the degree of subcooling in the room becomes a predetermined value. The degree of indoor subcooling is a value obtained by subtracting the temperature detected by the temperature sensor 208a or 208b 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 conditioner 101 is controlled such that when the condensing temperature is within a certain temperature range, the degree of supercooling is within a certain temperature range. . The degree of supercooling is a value obtained by subtracting the temperature detected by the temperature sensor 208a or 208b from the saturation temperature at the discharge pressure detected by the pressure sensor 201.

  Next, the management system 106 of the first embodiment connected to the above-described refrigeration cycle apparatus will be described. As described above, in the first embodiment, the refrigeration cycle device management system 106 is configured as a data acquisition system or an abnormality detection system. In the following, the air conditioner 101 will be described as an example of a refrigeration cycle device connected to the management system 106.

  FIG. 2 is a schematic diagram illustrating a connection example of the management system 106 according to the first embodiment to the air-conditioning apparatus 101. As shown in FIG. 2, the management system 106 can be connected to the data transmission device 102 connected to at least one air conditioner 101 via the communication network 103.

  The data transmission device 102 is configured as, for example, a local controller, and is installed in the property 108 together with the air conditioner 101. The data transmitting apparatus 102 is connected to one or more air conditioners 101 directly or via a dedicated adapter. The data transmitting device 102 transmits and receives data to and from the control unit 107 of one or more air conditioners 101, and centrally manages the air conditioners 101. The data transmission device 102 has a microcomputer including a CPU, a ROM, a RAM, an I / O port, and the like. The data transmitting apparatus 102 is configured to transmit and receive data to and from the management system 106. For example, the data transmitting 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 includes 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 in a remote management center, for example, as a remote server remote from the property 108.

  FIG. 3 is a block diagram showing a 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 a calculation unit 120, a control unit 121, a communication unit 122, and a display unit 123. The calculation unit 120 is configured to perform calculation such as calculation of an average value of data. The control unit 121 is configured to control a data transmission command to the data transmission device 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 such as setting of an abnormality detection mode and abnormality determination. The communication unit 122 is configured to transmit and receive data to and from the data transmission device 102 via the communication network 103 such as the Internet line, and to transmit and receive data to and from the data storage device 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, to display the presence or absence of an abnormality. Is done.

  FIG. 4 is a block diagram showing a 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 includes a communication unit 141 that transmits and receives data to and from the monitoring device 104, and a storage unit 142 that stores the received data. The data storage device 105 receives a set of data from the monitoring device 104, for example, data on the pressure or temperature of the refrigeration cycle of the air conditioner 101, data on the ambient temperature of the heat source unit 304, and data on the ambient temperature of the use units 303a and 303b. When the data is received, a set of data is associated with each other, and is sequentially stored in the storage unit 142 in a time series as new data. In the first embodiment, the data storage device 105 is connected to the communication network 103 via the monitoring device 104. However, the data storage device 105 may be directly connected to the communication network 103.

  In the first embodiment, the data transmission device 102, the monitoring device 104, and the data storage device 105 are configured differently from the air conditioner 101. However, the functions of the data transmission device 102, the monitoring device 104, and the data storage device 105 are different. The control unit 107 of the air-conditioning apparatus 101 may be provided. In Embodiment 1, the management system 106 is configured to connect to the air-conditioning apparatus 101 via the data transmitting apparatus 102 and the communication network 103. You may comprise.

  Next, 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 will be described with reference to FIG.

  FIG. 5 is a flowchart illustrating an example of a control process 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 illustrated in FIG. 5 is repeatedly executed at predetermined time intervals at least all the time, including during operation of the air conditioner 101, or only during the operation of the air conditioner 101.

  In the following description, among the parameters measured in the air conditioner 101, a parameter indicating a state such as pressure or temperature of the air conditioner 101, for example, data of pressure or temperature in a refrigeration cycle of the air conditioner 101 is referred to. , Environment parameters. In addition, among the parameters measured in the air conditioner 101, the components of the air conditioner 101 such as the frequency of the compressor 1, the opening degrees of the expansion valves 14a and 14b, and the rotation speed of the outdoor blower 4, that is, the actuators The parameter indicating the operation state is referred to as an operation state parameter.

  In step S1, the control unit 121 of the monitoring device 104 transmits the first data, which is a part of the parameters measured in the air conditioner 101, from the air conditioner 101 to the data transmission device 102 and the communication network 103. Perform the acquisition process. For example, the first data includes an environmental parameter of the air conditioner 101 or a parameter of an operation state of the air conditioner 101.

  In step S2, the control unit 121 of the monitoring device 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 an arbitrary numerical range according to the attributes of the first data such as the condensation temperature and the evaporation temperature. FIG. 6 is a block diagram schematically showing an example of a 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. The calculation for classifying the first data into a plurality of data groups is performed by the calculation unit 120 of the monitoring device 104.

  In step S3, the control unit 121 of the monitoring device 104 performs a process of selecting an index data group serving as a target range from the stored plurality of data groups. The index data group serving as the target range is calculated, for example, by calculating the frequency, which is the occurrence rate of a plurality of data groups, by the calculation unit 120 of the monitoring device 104, and based on the calculation result, by the control unit 121 of the monitoring device 104. Is determined by selecting the index data group. In FIG. 6, the high-frequency index data group serving as the target range is illustrated as “condition A”.

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

  When it is determined that the first data is within the target range, in step S5, the control unit 121 of the monitoring device 104 converts the second data, which is another part of the parameter measured by the air conditioner 101, into: A process of acquiring from the air conditioner 101 via the data transmitting device 102 and the communication network 103 is performed. The second data includes an environmental parameter in the air conditioner 101 or a parameter of an operation state of the air conditioner 101, and is different from the first data.

  Specifically, in step S5, the control unit 121 of the monitoring device 104 transmits a second data transmission command to the data transmission device 102. The data transmission device 102 that has received the data transmission instruction acquires the second data from the air conditioner 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.

  In steps S2 to S4, the configuration in which the target range of the first data is determined by the monitoring device 104 is illustrated. However, the target range of the first data is based on the attribute of the first data and the air conditioning. The value may be set in advance to a predetermined value in consideration of the specifications of the device 101 and the like. For example, when the first data is the condensing temperature, the target range of the first data, that is, the target temperature range of the condensing temperature can be set in a range of 33 ° C. to 37 ° C.

  Next, 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 will be described with reference to FIG.

  FIG. 7 is a flowchart illustrating an example of a control process executed by the monitoring device 104 when the management system 106 according to the first embodiment is configured as an abnormality detection system. The process illustrated in FIG. 7 is repeatedly executed at predetermined time intervals at least during the operation including at least the operation of the air conditioner 101, or only during the operation of the air conditioner 101, similarly to the process of FIG.

In step S11, the control unit 121 of the monitoring device 104 transmits the first data, which is a part of the parameters measured in the air conditioner 101, to the air conditioner, as in the process of step S1 in the data acquisition system. The processing obtained from 101 is performed. In step S12, the control unit 121 of the monitoring device 104 performs a process of classifying the acquired first data into a plurality of data groups, similarly to the process of step S2 in the data acquisition system.
In step S13, the control unit 121 of the monitoring device 104 selects an index data group to be a first target range from among the plurality of stored data groups, similarly to the processing of step S3 in the data acquisition system. Perform the following processing. The index data group is a data group serving as an index of abnormality detection in the abnormality detection system. In step S14, similarly to the process in 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. When it is determined that the first data is within the first target range, in step S15, the control unit 121 of the monitoring device 104 performs measurement in the air-conditioning apparatus 101 in the same manner as in step S5 in the data acquisition system. A process of acquiring second data, which is another part of the parameter to be performed, from the air conditioner 101 via the data transmission device 102 and the communication network 103 is performed.

  In step S16, the control unit 121 of the monitoring device 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. The control unit 121 of the monitoring device 104 stores, for example, the second data acquired in the past as the third data in the storage unit 142 of the storage device 140 in the data storage device 105, and stores the third data in the storage device 140. The second target range can be determined from the obtained third data.

  In step S17, the control unit 121 of the monitoring device 104 determines whether the second data is within the second target range. When it is determined that the second data is within the second target range, the second data is regarded as a normal value, and the control process ends.

  When it is determined that the second data is not in 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 illustrating an example of abnormality detection in the control unit 121 of the monitoring device 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 in FIG. 8 indicates the passage of time. The two dotted lines parallel to the horizontal axis drawn in the graph of FIG. 8 represent the second target range determined as a normal value from the second past data. The magnitude of the second data at any time is shown in a plot. As illustrated in the graph of FIG. 8, the monitoring device 104 determines that the current second data is determined based on the numerical range of the past second data, that is, the third data stored in the storage device 140. It can be configured to determine that an abnormality has occurred when the value deviates from the second target range.

  When it is detected that the second data is abnormal, the control unit 121 of the monitoring device 104 can be configured to display the abnormality on the display unit 123 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 conditioner 101. By outputting the second data as a graph, a maintenance inspector or a regular inspector of the air-conditioning apparatus 101 can detect an abnormality from the data transition of the graph.

  Next, when the management system 106 is configured as an abnormality detection system, transmission and reception of data between the data transmitting apparatus 102 and the management system 106 and abnormality detection in the management system 106 will be specifically described using the first to third embodiments. Will be described.

  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 index of abnormality detection, and the condition B, which is another data group, described in the control processing of FIG. , C, and the numerical range of the past second data. Note that, as described in the control processing 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. The numerical range of the second past data corresponds to the second target range determined from the third data stored in the storage device 140.

  In the following first to third embodiments, the first data corresponds to a control amount in the air-conditioning apparatus 101. The first target range corresponds to a target value of the control amount in the air conditioner 101. The second data corresponds to an operation amount for adjusting the first data to a target value of the control amount in the air conditioner 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 conditioner 101.

(Example 1)
Example 1 of the first embodiment will be described with reference to FIG. FIG. 9 schematically illustrates an example of data transmission and reception between the data transmitting apparatus 102 and the management system 106 in the control processing according to the first embodiment. Arrows extending vertically below indicate the passage of time, and horizontal arrows indicate data transmission and reception.

  In the air conditioner 101, the operating frequency f of the compressor 1 is controlled so that the condensing temperature T falls within a predetermined numerical range. That is, in the control system of the air-conditioning apparatus 101 according to the first embodiment, the condensing temperature T is a controlled variable, and the operating frequency f of the compressor 1 is a controlled variable. In the first embodiment, the first data is set to the condensing temperature T which is a control amount, and the second data is set to the operating 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 as an operation amount is controlled within a predetermined numerical range so that the condensing temperature T as a control amount falls within a predetermined numerical range. Therefore, when there is an abnormality in the compressor 1, for example, when the performance of the compressor 1 is degraded, the operating frequency f of the compressor 1 is set to a predetermined value so that the condensation temperature T falls within a predetermined numerical range. It is controlled to be larger than the numerical range.

  The condition A, which is an index data group serving as an index of abnormality detection in the first embodiment, that is, the first target range, is such that the condensation temperature T satisfies 34 ° C <T ≦ 36 ° C. Conditions B and C, which are other data groups, are such that the condensation temperature T satisfies 36 ° C. <T ≦ 38 ° C. and 32 ° C. <T ≦ 34 ° C., respectively.

  Further, 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 past compressor 1 is set to be 58 Hz <f ≦ 62 Hz.

  In the phase P1 of FIG. 9, a case is considered where the first data, which is a control amount that does not satisfy the condition A, for example, T = 37.0 ° C. and 33.5 ° C., is transmitted from the data transmitting apparatus 102. In this case, the management system 106 classifies the first data into data groups of the conditions B and C. On the other hand, since the management system 106 does not perform any action on the data transmitting apparatus 102, the abnormality detection processing in the phase P1 ends.

  In the phase P2 of FIG. 9, a case is considered where the first data, which is a control amount satisfying the condition A, for example, T = 35.0 ° C., is transmitted from the data transmitting apparatus 102. In this case, the management system 106 classifies the first data into the data group of the condition A, and the management system 106 requests the data transmission device 102 to transmit the second data, which is the operating frequency f of the compressor 1. Do. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. 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 the past second data, and the acquired second data is determined to be in the second target range. You. As a result, the second data is detected to be a normal value, and the abnormality detection processing in phase P2 ends.

  In the phase P3 of FIG. 9, a case is considered where the first data, for example, T = 35.5 ° C., which is a control amount satisfying the condition A, is transmitted from the data transmitting apparatus 102. In this case, the management system 106 classifies the first data into the data group of the condition A, and the management system 106 requests the data transmission device 102 to transmit the second data, which is the operating frequency f of the compressor 1. Do. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. 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 the past second data, and it is determined that the acquired second data is not in the second target range. You. As a result, the second data is detected as abnormal, and the abnormality detecting process in phase P3 ends.

(Example 2)
In the air-conditioning apparatus 101 during the heating operation, the rotation speed n of the outdoor blower 4, for example, the rotation speed n in minutes, is controlled such that the evaporation temperature T1 falls within a predetermined numerical range. That is, in the control system of the air conditioner 101 according to the second embodiment, the evaporation temperature T1 is a control amount, and the rotation speed n of the outdoor blower 4 is an operation amount. In the second embodiment, the first data is the evaporation temperature T1 as the control amount, and the second data is the rotation speed n of the outdoor blower 4 per minute as 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 rotation speed n of the outdoor blower 4 as the operation amount is controlled to a predetermined numerical range so that the evaporation temperature T1 as the control amount falls within a 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 degraded, the rotation speed n of the outdoor blower 4 is set to a predetermined value so that the evaporation temperature T1 falls within a predetermined numerical range. It is controlled to be larger than the numerical range.

  In the condition A, which is an index data group serving as an index of abnormality detection in the second embodiment, that is, the first target range, the evaporation temperature T1 is set to be −36 ° C. <T1 ≦ −34 ° C. Conditions B and C, which are other data groups, are such that the evaporation temperature T1 satisfies −38 ° C. <T1 ≦ −36 ° C. and −34 ° C. <T1 ≦ −32 ° C., respectively.

  Further, the past second data in the second embodiment, that is, the second target range, which is the past numerical range of the number of rotations n of the outdoor blower 4 per minute, is set to 58 <n ≦ 62.

  Consider a case where the first data, for example, T1 = −37.0 ° C., −35.5 ° C., which is a control amount that does not satisfy the condition A, is transmitted from the data transmitting apparatus 102. In this case, as in the case of the phase P1 in FIG. 9, the management system 106 classifies these first data into data groups of the conditions B and C. On the other hand, since the management system 106 does not perform any action on the data transmission apparatus 102, the abnormality detection processing in this phase ends.

  Consider a case where first data, which is a control amount satisfying the condition A, for example, T1 = -35.0 ° C., is transmitted from the data transmitting apparatus 102. In this case, similarly to the case of the phase P2 in FIG. 9, the management system 106 classifies the first data into a data group of the condition A, and the management system 106 sends the second data to the data transmission apparatus 102. A transmission request for the rotation speed n of the outdoor blower 4 is made. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. 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 the past second data, and the acquired second data is determined to be in the second target range. You. As a result, the second data is detected to be a normal value, and the abnormality detection processing in this phase ends.

  Consider a case where first data, which is a control amount satisfying the condition A, for example, T1 = -35.5 ° C., is transmitted from the data transmitting apparatus 102. In this case, similarly to the case of the phase P3 in FIG. 9, the management system 106 classifies the first data into a data group of the condition A, and the management system 106 sends the second data to the data transmitting apparatus 102. A transmission request for the rotation speed n of the outdoor blower 4 is made. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. 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 obtained second data is compared with the second target range, and it is determined that the obtained second data is not in the second target range. As a result, the second data is detected as abnormal, and the abnormality detecting process in this phase ends.

(Example 3)
In the air-conditioning apparatus 101 during the heating operation, the opening degree D of the expansion valve 14a is controlled such that the indoor subcooling degree 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 subcooling T2 is a control amount, and the opening D of the expansion valve 14a is an operation amount. In the third embodiment, the first data is the degree of indoor subcooling T2, which is a control amount, and the second data is the opening degree D of the expansion valve 14a, which is an operation amount. Here, the opening D of the expansion valve 14a is defined as 1 at full opening and 0 at full closing, and the possible range of the opening D is 0 ≦ D ≦ 1. The indoor subcooling 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 to a predetermined numerical range so that the indoor subcooling degree T2, which is a control amount, is within a predetermined numerical range. . Therefore, when there is an abnormality in the expansion valve 14a, for example, when the expansion valve 14a is clogged, the opening degree D of the expansion valve 14a is set so that the indoor subcooling degree T2 falls within a predetermined numerical range. Control is performed so as to be larger than a predetermined numerical range.

  The condition A, which is an index data group serving as an index of abnormality detection in the second embodiment, that is, the first target range, is such that the degree of indoor subcooling T2 is 5 ° C <T2 ≦ 6 ° C. Conditions B and C, which are other data groups, are such that the degree of indoor subcooling T2 is 6 ° C <T2 ≦ 7 ° C and 5 ° C <T ≦ 6 ° C.

  Also, the second past data in the third embodiment, that is, the second target range which is the past numerical range of the opening degree D of the expansion valve 14a is determined to be 0.40 <D ≦ 0.60. .

  Consider a case where first data, for example, T2 = 6.5 ° C., 5.1 ° C., which is a control amount that does not satisfy the condition A, is transmitted from the data transmitting apparatus 102. In this case, similarly to the case of the phase P1 in FIG. 9, the management system 106 classifies the first data into data groups of the conditions B and C. On the other hand, since the management system 106 does not perform any action on the data transmission apparatus 102, the abnormality detection processing in this phase ends.

  Consider a case where 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, similarly to the case of the phase P2 in FIG. 9, the management system 106 classifies the first data into a data group of the condition A, and the management system 106 sends the second data to the data transmission apparatus 102. A transmission request for the opening D of the expansion valve 14a is made. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. 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 with 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 processing in this phase ends.

  Consider a case where first data, which is a control amount satisfying the condition A, for example, T2 = 5.5 ° C., is transmitted from the data transmitting apparatus 102. In this case, similarly to the case of the phase P3 in FIG. 9, the management system 106 classifies the first data into a data group of the condition A, and the management system 106 sends the second data to the data transmitting apparatus 102. A transmission request for the opening D of the expansion valve 14a is made. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. 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 the past second data, and it is determined that the acquired second data is not in the second target range. You. As a result, the second data is detected as abnormal, and the abnormality detecting process in this phase ends.

  As described above, the data acquisition system according to Embodiment 1 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. Is obtained from the air conditioner 101, and when the first data is within the target range, the second data that is another part of the parameter measured by the air conditioner 101 is A monitoring device 104 obtained from the air conditioner 101 is provided.

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

  According to the above-described configuration, the configuration can be such that a part of the parameters measured in the refrigeration cycle apparatus is acquired, and thus the capacity shortage of the data storage device 105 can be solved.

  Further, 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 by the air conditioner 101, so that an increase in the communication capacity of the communication network 103 can be eliminated. In addition, since the data acquisition system can be configured as a remote monitoring server by connecting the data acquisition system via the communication network 103, a data acquisition system capable of simultaneously managing data of a large number of air conditioners 101 can be constructed.

  Further, in the data acquisition system according to Embodiment 1, the first data and the second data can be configured to include an environmental parameter in air conditioner 101 or a parameter of an operation state of air conditioner 101. . Specifically, the environmental parameters can be configured to include a pressure parameter or a temperature parameter. Also, the temperature parameter can be configured to include one or more of a condensation temperature, an evaporation temperature, or a degree of subcooling. Further, the operating state parameter can be configured to include the operating frequency of the compressor 1 or the opening degrees of the expansion valves 14a and 14b. Further, the data acquisition system according to Embodiment 1 can be used in an air conditioner 101 including an air-cooled heat source-side heat exchanger and an outdoor blower 4 that supplies air to the air-cooled heat source-side heat exchanger. , The operating state parameter may include the rotation speed of the outdoor blower 4.

  In the first embodiment, for example, an environmental parameter or an operating state parameter can be acquired as data for abnormality detection in the air conditioner 101. The acquired environmental parameters or operating state parameters can be stored in the data storage device 105, and the data stored in the data storage device 105 can be stored at the time of maintenance or periodic inspection of the air conditioner 101, for example, as shown in FIG. It can be output on paper like the graph in Fig. 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, it is possible to detect a decrease in the performance of the compressor 1 from a change in the data of the operating frequency of the compressor 1. Further, clogging of the expansion valves 14a, 14b can be detected from the data transition of the opening degrees of the expansion valves 14a, 14b. In addition, it is possible to detect a decrease in the performance of the outdoor blower 4 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 examples of the pressure reducing device. Is an example of a refrigeration cycle device, and the monitoring device 104 is an example of a control device. The air-cooled heat source side heat exchanger is an example of the outdoor heat exchanger 3, and the outdoor blower 4 is also referred to as a heat source side blower fan.

  The abnormality detection system according to the first embodiment is connected to an air conditioner 101 including a compressor 1 and expansion valves 14a and 14b, and is a first data which is a part of a parameter measured in the air conditioner 101. From the air conditioner 101, and when the first data is within the first target range, the second data, which is another part of the parameters measured in the air conditioner 101, is obtained from the air conditioner 101. A monitoring device 104 is provided that detects that the air conditioner 101 is abnormal when 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 conditioner 101 including the compressor 1 and the expansion valves 14a and 14b. Obtaining from the air conditioner 101 first data that is part of the parameters measured at 101; and measuring at the air conditioner 101 when the first data is within a first target range. Acquiring the 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 in the second target range. And a process.

  According to the above configuration, the abnormality of the air conditioner 101 can be detected with a small amount of data that can be acquired from the air conditioner 101. Therefore, according to the first embodiment, the amount of data used for abnormality detection can be significantly reduced, and the shortage of capacity of the data storage device 105 can be solved. Further, according to these configurations, it is possible to reduce the amount of energy consumed by the abnormality detection system for abnormality detection.

  In addition, 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 some of the parameters measured by the air-conditioning apparatus 101, so that an increase in the communication capacity of the communication network 103 can be eliminated. In addition, since the abnormality detection system can be configured as a remote monitoring server by connecting the abnormality detection system via the communication network 103, an abnormality detection system that can simultaneously manage 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 conditioner 101 as third data, and the monitoring device 104 includes the data storage device 105 Can be configured to determine the second target range from the third data stored in. According to this configuration, it is possible to detect an abnormality including a refrigerant leak by comparing a small amount of data in a time series, so that it is possible to enhance product safety and environmental preservation, and to reduce an environmental load. can do.

  In the abnormality detection system according to Embodiment 1, the first data includes the control amount of the air conditioner 101, the first target range is a target value of the control amount, and the second data is a target value of the control amount. 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 Embodiment 1, the control amount includes the condensing temperature, the operation amount includes the operating frequency of the compressor 1, and the abnormality of the air conditioner 101 indicates the compressor. 1 can be included. In the abnormality detection system according to the first embodiment, the control amount includes the degree of supercooling, the operation amount includes the degree of opening of the expansion valves 14a and 14b, and the abnormality of the air-conditioning apparatus 101 includes the expansion valve. It can be configured to include clogging of 14a, 14b. Further, the abnormality detection system according to Embodiment 1 can be used in an air conditioner 101 including an air-cooled heat source-side heat exchanger and an outdoor blower 4 that supplies air to the air-cooled heat source-side heat exchanger. The control amount may include the evaporation temperature, the operation amount may include the rotation speed of the outdoor blower 4, and the abnormality of the air conditioner 101 may include a decrease in the performance of the outdoor blower 4.

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

  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 examples of a pressure reducing device, and the air conditioner 101 is an example. The monitoring device 104 is an example of a control device. The air-cooled heat source side heat exchanger is an example of the outdoor heat exchanger 3, and the outdoor blower 4 is also referred to as a heat source side blower fan.

  The air-conditioning apparatus 101 according to Embodiment 1 includes a refrigeration cycle circuit including the compressor 1 and the expansion valves 14a and 14b, and first data, which is a part of a parameter measured in the refrigeration cycle circuit, in the refrigeration cycle. A control unit 107 for obtaining from the refrigeration cycle circuit, second data obtained from the refrigeration cycle circuit, the second data being another part of the parameter measured in the refrigeration cycle circuit when the first data is within the first target range. Is provided. According to this configuration, it is possible to provide the air-conditioning apparatus 101 including the control unit 107 capable of performing the same control processing as the abnormality detection system according to the first embodiment.

  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 in the second target range. . According to this configuration, it is possible to provide the air-conditioning apparatus 101 including the control unit 107 capable of performing the same control processing as the abnormality detection system according to the first embodiment.

  Note that the air-conditioning apparatus 101 according to Embodiment 1 is an example of a refrigeration cycle apparatus, the expansion valves 14a and 14b are examples of a pressure reducing apparatus, and the control unit 107 is an example of a control apparatus.

Embodiment 2 FIG.
In the first embodiment described above, a case has been described in which the air-cooled air conditioner 101 is configured with the outdoor heat exchanger 3 as the air-cooled heat source side heat exchanger. In the second embodiment of the present invention, a case will be described in which a water-cooled air conditioner 101 is configured in which the outdoor heat exchanger 3 is a water-cooled heat source side heat exchanger. For example, the heat source unit 304 of the water-cooled air conditioner 101 includes a water-cooled chiller unit.

  FIG. 10 is a refrigerant circuit diagram illustrating an example of a schematic configuration of an air-conditioning apparatus 101 according to Embodiment 2. In the air-conditioning apparatus 101 according to Embodiment 2, instead of the air-cooled heat source side heat exchanger and the outdoor blower 4 as an example of the outdoor heat exchanger 3, a water-cooled type as another example of the outdoor heat exchanger 3 is used. It includes a heat source side heat exchanger and a water cooling pump 305 connected to the water cooling type heat source side heat exchanger. The water-cooled heat source-side heat exchanger and the water-cooled pump 305 are connected by piping, and constitute a water-cooled circuit for circulating water or brine. Although not shown, a cooling tower installed outdoors for cooling water or brine by direct or indirect contact with the atmosphere is connected to the water cooling circuit by piping.

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

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

  The water-cooled pump 305 is a fluid machine that sucks water or brine from a cooling tower, and presses the sucked water or brine into a water-cooled heat source-side heat exchanger. The water cooling pump 305 is configured so that the flow rate of water or brine can be adjusted by an electric current. The water cooling pump 305 is constituted by, 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.

  Other configurations of the air-conditioning apparatus 101 according to Embodiment 2 are the same as the configurations described in Embodiment 1 described above.

  Next, an example of transmission and reception of data between the data transmitting 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 in the second embodiment will be described. I do.

  The following example is based on the first data, the second data, the condition A, which is an index data group serving as an index of abnormality detection, and other data groups described in the control processing of FIG. 7 of the first embodiment. It specifically specifies certain conditions B and C and a numerical range of past second data. Note that, as described in the control processing 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. The numerical range of the second past data corresponds to the second target range determined from the third data stored in the storage device 140.

  In the following example, the first data corresponds to the control amount in the air conditioner 101. The first target range corresponds to a target value of the control amount in the air conditioner 101. The second data corresponds to an operation amount for adjusting the first data to a target value of the control amount in the air conditioner 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 conditioner 101.

  In the air-conditioning apparatus 101 during the cooling operation, the current value I of the motor that drives the water-cooled pump 305 is determined by the temperature of the inlet / outlet of the water-cooled heat source-side heat exchanger, that is, the inlet of the water-cooled heat source-side heat exchanger on the water-cooling circuit side. Is controlled so that the temperature difference ΔT3 between the outlet and the outlet falls within a predetermined numerical range. That is, in an example of the control system of the air-conditioning apparatus 101 according to Embodiment 2, the temperature difference ΔT3 between the inlet and the outlet on the water cooling circuit side of the water-cooled heat source-side heat exchanger becomes the control amount, 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, which is 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 on the water cooling circuit side of the water-cooled 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. Is 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 on the water cooling circuit side of the water-cooled heat source-side heat exchanger” is referred to as “temperature difference ΔT3”.

  When the performance of the water-cooled pump 305 is normal, the motor current value I, which is the operation amount, is controlled within a predetermined numerical range so that the temperature difference ΔT3, which is the control amount, is within a 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 current value I of the motor is set to a predetermined value range so that the temperature difference ΔT3 falls within a predetermined value range. Is also controlled to be large.

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

  Further, 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 determined to be 0.5A <I ≦ 1.0A. .

  Consider a case where first data, for example, ΔT3 = 8.0 ° C., 4.3 ° C., which is a control amount that does not satisfy the condition A, is transmitted from the data transmitting apparatus 102. In this case, the management system 106 classifies the first data into the data groups of the conditions B and C, as in the case of the phase P1 in FIG. On the other hand, since the management system 106 does not perform any action on the data transmission apparatus 102, the abnormality detection processing in this phase ends.

  Consider a case where first data, which is a control amount satisfying the condition A, for example, ΔT3 = 6.0 ° C., is transmitted from the data transmitting apparatus 102. In this case, similarly to the case of the phase P2 of FIG. 9 in the first embodiment, the management system 106 classifies these first data into a data group of the condition A, and the management system 106 Request for transmission of the motor current value I as the second data. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. Here, it is assumed that the motor current value I transmitted to the management system 106 is I = 0.8 A. In the management system 106, the acquired second data is compared with a second target range, which is a numerical range of the past second data, and the acquired second data is determined to be in the second target range. You. As a result, the second data is detected to be a normal value, and the abnormality detection processing in this phase ends.

  Consider a case where first data, which is a control amount satisfying the condition A, for example, ΔT3 = 6.5 ° C., is transmitted from the data transmitting apparatus 102. In this case, similarly to the case of the phase P3 in FIG. 9, the management system 106 classifies the first data into a data group of the condition A, and the management system 106 sends the second data to the data transmitting apparatus 102. A transmission request of the motor current value I is made. In response to the transmission request, the data transmission device 102 transmits the second data, which is the operation amount, to the management system 106. Here, it is assumed that the motor current value I transmitted to the management system 106 is I = 1.5 A. In the management system 106, the obtained second data is compared with the second target range, and it is determined that the obtained second data is not in the second target range. As a result, the second data is detected as abnormal, and the abnormality detecting 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 abnormality detection in the water-cooled pump 305 in the same manner.

  As described above, the data acquisition system according to the second embodiment includes the water-cooled heat source-side heat exchanger and the water-cooled pump 305 connected to the water-cooled heat source-side heat exchanger. The water cooler and the water cooling pump 305 can be used in the air conditioner 101 constituting a water cooling circuit for circulating water or brine, and the temperature parameter is determined by the inlet and outlet on the water cooling circuit side of the water cooling type heat source side heat exchanger. The operating state parameter can be configured to include a measurement of the current that drives the water-cooled pump 305.

  According to this configuration, the data acquisition system according to the second embodiment can acquire, for example, the motor current value I or the temperature difference ΔT3 as data for detecting an abnormality in the water-cooled pump 305. The acquired current value I or temperature difference ΔT3 of the motor can be stored in the data storage device 105, and the data stored in the data storage device 105 can be stored at the time of maintenance or periodic inspection of the air conditioner 101, for example, It can be output on paper 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 blockage of the water cooling circuit can be detected from the data transition of the motor current value I.

  The abnormality detection system according to the second embodiment includes a water-cooled heat source-side heat exchanger and a water-cooled pump 305 connected to the water-cooled heat source-side heat exchanger. 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 between the inlet and the outlet on the water cooling circuit side of the water-cooled heat source-side heat exchanger. The manipulated variable includes the temperature difference, the manipulated variable includes a measured value of the current for driving the water cooling pump 305, and the abnormality of the air conditioner 101 can be configured to include a blockage of the water cooling circuit.

  According to this configuration, even if the air-conditioning apparatus 101 is a water-cooled type, an abnormality specific to the water-cooled air-conditioning apparatus 101 can be detected 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 conditioner 101 is an example of a refrigeration cycle device. The water-cooled heat source-side heat exchanger is an example of the outdoor heat exchanger 3.

Embodiment 3 FIG.
In the first embodiment and the second embodiment described above, the management system 106 that acquires, as the second data, the parameter that indicates the operation state of the device constituting the air-conditioning apparatus 101, that is, the actuator, has been described with a specific example. In a 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.

  Hereinafter, an example of transmission and reception of data between the data transmitting 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 based on the first data, the second data, the condition A, which is an index data group serving as an index of abnormality detection, and other data groups described in the control processing of FIG. 7 of the first embodiment. It specifically specifies certain conditions B and C and a numerical range of past second data. As described in the above control processing, the condition A corresponds to the first target range, and the conditions B and C are data groups outside the first target range. The numerical range of the second past data corresponds to the second target range determined from the third data stored in the storage device 140.

  In the air conditioner 101, the entire system of the air conditioner 101 is controlled such that when the condensing temperature T4 falls within a certain temperature range, the degree of supercooling T5 falls within a certain temperature range. In the third embodiment, the first data is set to the condensation temperature T4, and the second data is set to the degree of supercooling T5. The condensation temperature T4 is calculated, for example, as a saturation temperature at the discharge pressure detected by the pressure sensor 201. During the cooling operation, the degree of supercooling 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. In the heating operation, the degree of supercooling T5 is calculated, for example, as a value obtained by subtracting the temperature detected by the temperature sensor 208a or 208b from the saturation temperature at the discharge pressure detected by the pressure sensor 201.

  When there is no refrigerant leakage from the air conditioner 101 and the condensing temperature T4 falls within a certain range, the degree of supercooling 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 supercooling T5 is out of a certain range and becomes large due to insufficient refrigerant.

  The condition A, which is an index data group serving as an index of abnormality detection in the third embodiment, that is, the first target range, is such that the condensation temperature T4 satisfies 34 ° C <T ≦ 36 ° C. 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, respectively.

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

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

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

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

  As described above, in the abnormality detection system according to Embodiment 3, the first data includes the condensing temperature, the first target range is the allowable range of the condensing temperature in the air conditioner 101, The data of No. 2 includes the degree of subcooling, and the second target range can be configured to be an allowable range of the degree of supercooling at the condensing temperature. Can be detected.

  According to this configuration, since the refrigerant leakage from the air conditioner 101 can be detected from the degree of supercooling when the condensing temperature is in a certain range, the amount of data acquired from the air conditioner 101 is reduced. Can also be configured to detect refrigerant leakage 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 supercooling T5 can be acquired as data for detecting a refrigerant leak from the air conditioner 101 in the same manner.

  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 conditioner 101 is an example of a refrigeration cycle device.

Embodiment 4 FIG.
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 will be described. . FIG. 11 is a flowchart showing 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 when performing the process of step S2 in FIG. 5, or may be performed periodically, for example, once a year, in order to determine an optimal numerical range. May be performed.

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

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

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

  In step S24, the control unit 121 of the monitoring device 104 in the management system 106 calculates the variance, that is, the variance of the index data group when the classification is performed in the current numerical range. The variation in the index data group can be, for example, a standard deviation or a 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 in the index data.

  In step S25, the control unit 121 of the monitoring device 104 determines whether the variation of the index data calculated in step S24 is smaller than a reference value of the variation. The reference value of the variation is arbitrarily determined according to the attribute of the first data. For example, if the first data is the condensation temperature T of Example 1 of Embodiment 1 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 of the index data is equal to or greater than the reference value of the variation, in step S26, the control unit 121 of the monitoring device 104 sets the numerical range of the plurality of data groups so as to reduce the numerical range. To change. The change of the numerical range can be performed in a predetermined width. For example, when the first data is the condensation temperature T of Example 1 of Embodiment 1 described above, the upper and lower limits 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. In step S25, the index data calculated in step S24 is used. Steps S22 to S26 are repeated until it is determined that the variation 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, in step S27, the numerical range for classifying the first data into a plurality of data groups is Is determined in the numerical range.

  According to the fourth embodiment, by performing such a determination process, it is possible to dynamically determine an optimal numerical range according to the attribute of the first data. With a small amount of data selected from the above, it is possible to accurately detect an abnormality of the refrigeration cycle device.

Other embodiments.
The present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, an Internet line has been described as an example of the communication network 103, but a LAN or a WAN may be used as the communication network 103.

  Further, in the second embodiment, the numerical range is changed in accordance with the variation of the index data, for example, the standard deviation, to determine the optimal numerical range. That is, it may be changed according to the frequency of occurrence, and an optimal numerical range may be determined.

  In the above embodiment, the air conditioner 101 is described as an example of a refrigeration cycle device. However, the present invention can be applied to other refrigeration cycle devices such as a hot water supply device, a refrigerator, a refrigerator, and a vending machine.

  DESCRIPTION OF SYMBOLS 1 Compressor, 2 four-way valve, 3 outdoor heat exchanger, 4 outdoor blower, 11 supercooling heat exchanger, 14a, 14b expansion valve, 15a, 15b indoor heat exchanger, 19 accumulator, 20 bypass depressurizing 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 arithmetic 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 Usage unit, 304 Heat source unit, 305 Water cooling pump.

Claims (6)

Connected to a refrigeration cycle device having a compressor and a decompression device,
Obtaining first data from the refrigeration cycle apparatus, which includes a subcooling degree that is a part of a parameter measured in the refrigeration cycle apparatus and is a control amount,
When the degree of supercooling is within a first target range that is a target value of the degree of supercooling in the refrigeration cycle device, the part is another part of the parameter measured in the refrigeration cycle device, and Obtaining second data including the degree of opening of the pressure reducing device that is an operation amount for adjusting the degree of subcooling from the refrigeration cycle device,
When the opening degree of the pressure reducing device is not in the second target range which is a normal operation amount used to adjust the degree of subcooling to the target value, the abnormality of the refrigeration cycle device An abnormality detection system equipped with a control device that detects clogging. Connected to the refrigeration cycle device via a communication network,
The abnormality detection system according to claim 1. The apparatus further includes a data storage device that stores the second data acquired from the refrigeration cycle device as third data,
The abnormality detection system according to claim 1 or 2, wherein the control device determines the second target range from the third data stored in the data storage device. A refrigeration cycle circuit including a compressor and a decompression device,
Obtaining first data from the refrigeration cycle circuit that includes a degree of supercooling, which is a part of a parameter measured in the refrigeration cycle circuit and is a control amount,
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 supercooling degree is another part of the parameter measured in the refrigeration cycle circuit, and Obtaining second data including an opening degree of the pressure reducing device, which is an operation amount for adjusting the degree of subcooling, from the refrigeration cycle circuit,
When the opening degree of the pressure reducing device is not within the second target range which is a normal operation amount used to adjust the degree of subcooling to the target value, the pressure reducing device is regarded as abnormal in the refrigeration cycle circuit. A refrigeration cycle device including a control device that detects clogging of the refrigeration cycle. The apparatus further includes a data storage device that 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 of an abnormality detection system for detecting an abnormality of a refrigeration cycle device including a compressor and a pressure reducing device,
A step of acquiring, from the refrigeration cycle apparatus, first data that includes a degree of supercooling that is a part of a parameter measured in the refrigeration cycle apparatus and is a control amount;
When the degree of supercooling is within a first target range that is a target value of the degree of supercooling in the refrigeration cycle device, the part is another part of the parameter measured in the refrigeration cycle device, and A step of obtaining, from the refrigeration cycle device, second data including an opening degree of the pressure reducing device, which is an operation amount for adjusting the degree of subcooling,
When the opening degree of the pressure reducing device is not in the second target range which is a normal operation amount used to adjust the degree of subcooling to the target value, the abnormality of the refrigeration cycle device A step of detecting clogging.

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