WO2016174734A1 - Dispositif et procédé de suivi pour climatiseur - Google Patents

Dispositif et procédé de suivi pour climatiseur Download PDF

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Publication number
WO2016174734A1
WO2016174734A1 PCT/JP2015/062807 JP2015062807W WO2016174734A1 WO 2016174734 A1 WO2016174734 A1 WO 2016174734A1 JP 2015062807 W JP2015062807 W JP 2015062807W WO 2016174734 A1 WO2016174734 A1 WO 2016174734A1
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WIPO (PCT)
Prior art keywords
air conditioner
operation data
monitoring
air
refrigerant
Prior art date
Application number
PCT/JP2015/062807
Other languages
English (en)
Japanese (ja)
Inventor
章吾 玉木
Original Assignee
三菱電機株式会社
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2017515320A priority Critical patent/JPWO2016174734A1/ja
Priority to PCT/JP2015/062807 priority patent/WO2016174734A1/fr
Priority to EP15890718.8A priority patent/EP3290816B1/fr
Publication of WO2016174734A1 publication Critical patent/WO2016174734A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks

Definitions

  • the present invention relates to an air conditioner monitoring device that monitors the operating state of the air conditioner.
  • the present invention relates to an apparatus for detecting an abnormality of an air conditioner.
  • the abnormality detection system of Patent Document 1 is a system that detects an abnormality of an air conditioner using past operation state data.
  • An abnormality of the air conditioner is detected by comparing past operation data having similar operation conditions with the operation data of the air conditioner with respect to the operation data of the second air conditioner different from the air conditioner.
  • the second air conditioner has the same configuration as the air conditioner, and the installation locations of the two air conditioners are close to each other, and the environmental conditions are similar.
  • the two air conditioners are compared under the assumption that For this reason, the operation data of the air conditioner that deviates from these preconditions cannot be referred to, and the operation data that can be referred to are limited. Therefore, opportunities to obtain similar past driving data are reduced, and there is a limit to improving the accuracy of detecting abnormalities.
  • the present invention has been made to solve the above-described problems, and an object thereof is to obtain an air conditioner monitoring apparatus and the like that can detect an abnormality from more operation data.
  • the air conditioner monitoring apparatus includes a compressor, a heat source side heat exchanger, a throttling device, and a use side heat exchanger, and constitutes a refrigerant circuit that circulates refrigerant to perform air conditioning of a target space.
  • a monitoring device for an air conditioner which monitors operation data indicating the operating state of the air conditioner, on condition that the recording device records a plurality of air conditioners, and the specifications of the refrigerant and the equipment of the air conditioner
  • a monitoring processor that extracts operation data under the same range conditions as the target air conditioner from the recording device and detects an abnormality by comparing with operation data of the air conditioner to be monitored is provided.
  • the operation data to be compared with the operation data of the air conditioner to be monitored is obtained by collecting and recording the operation data in the plurality of air conditioners for a certain period. Can do a lot. Therefore, it is possible to obtain an air conditioner monitoring device that can detect an abnormality earlier and more accurately than in the past.
  • 1 is a block diagram showing a configuration of a recording apparatus 105 according to Embodiment 1 of the present invention.
  • FIG. 1 is a diagram illustrating a system configuration of an air-conditioning apparatus monitoring system 100 centering on an air-conditioning apparatus monitoring apparatus 109 according to Embodiment 1 of the present invention. Based on FIG. 1, the structure of the air conditioning apparatus monitoring system 100 of Embodiment 1 is demonstrated.
  • the air conditioning apparatus monitoring system 100 according to the present embodiment includes an air conditioning apparatus monitoring apparatus 109 that monitors the air conditioning apparatus 101 and performs processing such as abnormality detection.
  • the air conditioning apparatus monitoring system 100 of the present embodiment includes the first air conditioning apparatus 101a and the second air conditioning apparatus 101b as the air conditioning apparatus 101.
  • the air conditioning apparatus monitoring system 100 has the local controller 102 which controls the air conditioning apparatus 101 etc. corresponding to each air conditioning apparatus 101.
  • the first local controller 102a controls the first air conditioner 101a
  • the second local controller 102b controls the second air conditioner 101b
  • the air conditioning apparatus 101 and the local controller 102 are installed in each property 107, such as a building, a condominium, and a commercial facility.
  • the first air conditioner 101a and the first local controller 102a are installed in the property 107a
  • the second air conditioner 101b and the second local controller 102b are installed in the property 107b.
  • the first air conditioner 101a is an air conditioner to be monitored (target for performing abnormality detection).
  • the 2nd air conditioning apparatus 101b shall be an air conditioning apparatus used as the object from which the monitoring processing apparatus 104 collects operation data. Therefore, in FIG. 1, only one second air conditioner 101b is shown, but actually, a plurality of second air conditioners 101b are connected to the electric communication line 103 via the local controller 102. Yes. As the number of second air conditioners 101b increases, the number of usable operating data can be expected to increase.
  • the first air conditioner 101a may be the second air conditioner 101b (an air conditioner for collecting operation data).
  • the second air conditioner 101b may be the first air conditioner 101a (monitored air conditioner).
  • the air conditioner monitoring system 100 has an air conditioner monitoring device 109 including a monitoring processing device 104 and a recording device 105 in the remote management center 106.
  • the monitoring processor 104 is communicably connected to the above-described local controllers 102 via the electric communication line 103, and can send and receive signals including various data.
  • the monitoring processing device 104 in this embodiment performs processing such as abnormality detection and data recording to the recording device 105 from the data in the signal sent from each local controller 102.
  • the recording device 105 is communicably connected to the monitoring processing device 104.
  • the recording device 105 records data in a signal sent from the monitoring processing device 104.
  • operation data necessary for the monitoring processing device 104 to perform processing is included in the signal and sent.
  • the recording apparatus 105 includes two recording apparatuses 105, that is, the recording apparatus 105a and the recording apparatus 105b.
  • the local controller 102 is communicably connected to the corresponding air conditioner 101 directly or via a dedicated adapter, and can communicate with the air conditioner 101. Further, the local controller 102 is also connected to the monitoring processing device 104 via the electric communication line 103 and can perform communication.
  • the local controller 102 controls the air conditioner 101 by sending an instruction to the air conditioner 101 based on operation data that is data related to the operation of the air conditioner 101 that is periodically sent from the air conditioner 101. In addition, the local controller 102 records the operation data from the air conditioner 101 for a predetermined period (for example, one day) and periodically transmits it to the monitoring processor 104.
  • FIG. 2 is a block diagram showing the configuration of the monitoring processing device 104 according to the first embodiment of the present invention.
  • the monitoring processing apparatus 104 includes a calculation unit 120, a control unit 121, a communication unit 122, a display unit 123, and a storage unit 124.
  • the calculation unit 120 performs calculations necessary when the control unit 121 performs processing, such as calculation of an average value of index data.
  • the control unit 121 adjusts operations performed by the monitoring processing device 104 such as, for example, instructing data related to driving to the local controller 102, selecting an abnormality detection mode, and detecting an abnormality.
  • the communication unit 122 acquires a signal including operation data transmitted from the local controller 102 via the telecommunication line 103.
  • the past operation data recorded by the recording device 105 is received, and the operation data acquired from the local controller 102 is sent to the recording device 105.
  • the communication unit 122 sends the operation data determined to be recorded by the control unit 121 to the recording device 105.
  • the display unit 123 displays the processing result performed by the control unit 121, for example. In the present embodiment, the determination result in the abnormality detection process is displayed.
  • the storage unit 124 stores data necessary for the monitoring processing device 104 to perform processing, such as operation data sent from the local controller 102.
  • each unit such as the arithmetic unit 120 and the control unit 121 of the monitoring processing device 104 in the present embodiment can be configured as a device with different hardware, for example.
  • an arithmetic control means such as a CPU (Central Processing Unit)
  • its processing procedure can be programmed in advance and configured by software, firmware, or the like.
  • the arithmetic control means executes the program, performs processing based on the program, and realizes processing performed by each of the processing units.
  • the data of these programs may be stored in the storage unit 124, for example.
  • FIG. 3 is a block diagram showing a configuration of the recording apparatus 105 according to Embodiment 1 of the present invention.
  • the recording apparatus 105 according to the present embodiment has two storage devices 150 (150a and 150b).
  • Each storage device 150 includes a communication unit 140 (140a, 140b) and a storage unit 141 (141a, 141b).
  • the communication unit 140 communicates signals including operation data with the monitoring processing device 104.
  • the storage unit 141 stores (records) the operation data transmitted from the monitoring processing device 104. For example, data related to the second air conditioner 101b (data of refrigerant used, component equipment, etc.) and operation data related to the second air conditioner 101b are recorded in association with each other.
  • operation data necessary for the monitoring processing device 104 to perform processing is sent to the monitoring processing device 104.
  • the recording device 105 has a storage capacity capable of recording the operation data of the first air conditioner 101a and the second air conditioner 101b for about one year. For example, if operation data for one year after installation can be recorded, it is possible to record operation data relating to a single outdoor air (outdoor air) temperature and indoor load according to each season. For example, even if operation data for 3 years or more is recorded, operation data including changes due to deterioration over time may be used for abnormality detection, and abnormality detection relating to deterioration may not be possible. It is.
  • FIG. 4 is a diagram illustrating a device configuration and the like of the air-conditioning apparatus 101 according to Embodiment 1 of the present invention.
  • the air conditioner 101 is installed in the property 107.
  • the air conditioning apparatus 101 according to the present embodiment performs a refrigeration cycle operation in which the air-conditioning refrigerant is circulated by a vapor compression method, so that the selected cooling command (cooling ON / OFF) or heating command is used in each usage unit 303.
  • This is a device that can process (heating ON / OFF) and cool or heat the air-conditioning target space.
  • the air conditioner 101 of the present embodiment is configured by connecting a heat source unit 301 and a utilization unit 303 (303a, 303b) with an indoor liquid pipe 27 and an indoor gas pipe 28 that are refrigerant pipes.
  • the heat source unit 301 of the present embodiment includes a compressor 1, a four-way valve 2, a heat source side heat exchanger 3, a heat source side blower 4, a supercooling heat exchanger 11, an accumulator 19, a bypass pressure reducing mechanism 20, and a bypass pipe 21. It is configured.
  • the compressor 1 sucks and compresses refrigerant and discharges it in a high-temperature and high-pressure state.
  • the compressor 1 of the present embodiment includes, for example, an inverter device, and the rotation speed (driving frequency) can be controlled, and the capacity of the compressor 1 (the amount of refrigerant sent out per unit time) can be finely changed. It is of a type that can.
  • the compressor 1 serves as an element device that functions to control the refrigerant pressure.
  • the four-way valve 2 is a valve that switches the direction in which the refrigerant flows.
  • the four-way valve 2 has four ports from first to fourth.
  • the first port is connected to the discharge side of the compressor 1, the second port is connected to the heat source side heat exchanger 3, the third port is connected to the suction side of the compressor 1, and the fourth port is connected to the indoor gas pipe 28.
  • the four-way valve 2 communicates between the first port and the second port and at the same time communicates the third port and the fourth port (shown by the solid line in FIG. 1), and the first port and the fourth port.
  • the flow path is changed by switching to a state where the second port and the third port are in communication with each other (the state indicated by the broken line in FIG. 1).
  • the heat source side heat exchanger 3 is, for example, a cross fin type fin-and-tube heat exchanger constituted by a heat transfer tube and a large number of fins.
  • the heat source side heat exchanger 3 exchanges heat between outdoor air and refrigerant, for example.
  • the heat source side heat exchanger 3 functions as an evaporator during heating operation, and evaporates and vaporizes the refrigerant. Moreover, it functions as a condenser during the cooling operation, and condenses and liquefies the refrigerant.
  • the heat source side blower 4 is, for example, a propeller fan driven by a motor (not shown) made of a DC fan motor. The heat source side blower 4 supplies, for example, outside air to the heat source side heat exchanger 3.
  • the heat source side blower 4 of the present embodiment includes a fan that can change the flow rate of air supplied to the heat source side heat exchanger 3.
  • the heat source side blower serves as an element device for controlling the refrigerant pressure.
  • the accumulator 19 stores excess refrigerant in the refrigerant circuit during operation. Further, the liquid refrigerant that is temporarily generated when the operating state changes is retained, thereby preventing a large amount of liquid refrigerant from flowing into the compressor 1.
  • the supercooling heat exchanger 11 is composed of, for example, a double tube heat exchanger.
  • the supercooling heat exchanger 11 has a first flow path and a second flow path, and is an inter-refrigerant heat exchanger that exchanges heat between the refrigerants passing through the respective flow paths.
  • the refrigerant flowing into and out of the heat source side heat exchanger 3 passes through the first flow path.
  • the refrigerant that has passed through the bypass pressure reducing mechanism 20 flows into the second flow path and flows out to the bypass pipe 21.
  • the supercooling heat exchanger 11 is not limited to a two-pipe heat exchanger, and can exchange heat between the refrigerant passing through the first flow path and the refrigerant passing through the second flow path. Any structure may be used.
  • the bypass pressure reducing mechanism 20 adjusts the pressure and flow rate of the refrigerant that passes through the supercooling heat exchanger 11 and the bypass pipe 21.
  • the pressure sensor 201 is installed in the discharge side piping of the compressor 1, and the pressure sensor 211 is installed in the suction side piping of the compressor 1.
  • the pressure sensor 201 and the pressure sensor 211 measure (detect) the refrigerant pressure at each installation position.
  • the temperature sensor 202 is installed on the discharge side of the compressor 1, and the temperature sensor 203 is installed on the liquid side of the heat source side heat exchanger 3 (the side through which the liquid refrigerant or gas-liquid two-phase refrigerant passes).
  • the temperature sensor 207 is between the high pressure side of the supercooling heat exchanger 11 and the indoor liquid piping, the temperature sensor 212 is between the bypass pressure reducing mechanism 20 and the low pressure side of the supercooling heat exchanger 11, and the temperature sensor 213 is excessive. It is installed at the low pressure side outlet of the cooling heat exchanger 11.
  • Each temperature sensor measures the refrigerant temperature at the installation location.
  • the outside air temperature sensor 204 is provided, for example, at the air inlet of the heat source unit 301 and measures the outside air temperature.
  • control device 108 that controls the operating state of the air conditioner 101.
  • the control device 108 sends operation data obtained by, for example, measurement by various sensors installed in the air conditioner 101 to the local controller 102.
  • the usage unit 303 includes the usage-side decompression mechanism 14 and the usage-side heat exchanger 15.
  • the use side decompression mechanism 14 adjusts the amount of refrigerant and the refrigerant pressure that pass through the use side heat exchanger 15.
  • the use side heat exchanger 15 exchanges heat between the air in the air-conditioning target space and the refrigerant, for example. For example, it functions as a condenser during heating operation and condenses and liquefies the refrigerant. Moreover, it functions as an evaporator during cooling operation, evaporating and evaporating the refrigerant.
  • the temperature sensor 208 is installed on the liquid side of the usage-side heat exchanger 15 (the side on which the liquid refrigerant or gas-liquid two-phase refrigerant passes). Further, the temperature sensor 208 is installed on the gas side (the side on which the gas refrigerant or the gas-liquid two-phase refrigerant passes) of the use side heat exchanger 15. The temperature sensor 210 measures the temperature of room air (air in the air-conditioning target space).
  • the control device 108 controls each device included in the heat source unit 301 and the use unit 303 according to the air conditioning command requested by the use unit 303, performs the cooling operation mode or the heating operation mode, Air conditioning of the air-conditioning target space can be performed.
  • the control device 108 switches the four-way valve 2 so that the first port and the second port communicate with each other and at the same time the third port and the fourth port communicate with each other.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 via the four-way valve 2.
  • the refrigerant flowing into the heat source side heat exchanger 3 radiates heat to the outside air blown by the heat source side blower 4. Thereafter, the refrigerant is cooled by the low-pressure refrigerant in the supercooling heat exchanger 11 and then distributed to the refrigerant flowing through the indoor liquid pipe 27 or the bypass pressure reducing mechanism 20.
  • the refrigerant that has flowed through the indoor liquid pipe 27 is decompressed by the use-side decompression mechanism 14 and becomes a low-pressure two-phase refrigerant.
  • the low-pressure two-phase refrigerant cools the indoor air when passing through the use side heat exchanger 15 and becomes a low-pressure gas refrigerant. Thereafter, the air flows into the accumulator 19 via the indoor gas pipe 28 and the four-way valve 2 and is again sucked into the compressor 1.
  • control device 108 controls the compressor 1 so that the evaporation temperature in the use side heat exchanger 15 becomes a predetermined value.
  • the evaporation temperature is a saturation temperature at the pressure detected by the pressure sensor 211.
  • control apparatus 108 controls the heat source side air blower 4 so that the condensation temperature in the heat source side heat exchanger 3 becomes a predetermined value.
  • the condensation temperature is a saturation temperature at the pressure detected by the pressure sensor 201.
  • control device 108 controls the bypass pressure reducing mechanism 20 so that the degree of bypass superheat becomes a predetermined value.
  • the bypass superheat degree is a difference temperature obtained by subtracting the temperature related to detection by the temperature sensor 212 from the temperature related to detection by the temperature sensor 213.
  • the control apparatus 108 controls the utilization side decompression mechanism 14a so that indoor superheat degree may become predetermined value.
  • the indoor superheat degree is a difference temperature obtained by subtracting the temperature related to detection by the temperature sensor 208 from the temperature related to detection by the temperature sensor 209.
  • the control device 108 switches the four-way valve 2 so that the first port and the second port communicate with each other and at the same time the third port and the fourth port communicate with each other.
  • the bypass pressure reducing mechanism 20 has a fully closed opening.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows through the indoor gas pipe 28 via the four-way valve 2 and heats the indoor air in the use side heat exchanger 15 to become high-pressure liquid refrigerant. Thereafter, the pressure is reduced by the use side pressure reducing mechanism 14 to become a low pressure two-phase refrigerant. Then, it passes through the indoor liquid piping 27, passes through the supercooling heat exchanger 11, and flows into the heat source side heat exchanger 3. The refrigerant flowing into the heat source side heat exchanger 3 absorbs heat from the outside air and becomes a low-pressure gas refrigerant. Then, after passing through the accumulator 19 via the four-way valve 2, it is sucked into the compressor 1 again.
  • control device 108 controls the compressor 1 so that the condensation temperature in the use side heat exchanger 15 becomes a predetermined value. Moreover, the control apparatus 108 controls the heat source side air blower 4 so that the evaporation temperature in the heat source side heat exchanger 3 becomes a predetermined value. Then, the control device 108 controls the use-side decompression mechanism 14a so that the indoor supercooling degree becomes a predetermined value.
  • the indoor supercooling degree is a difference temperature obtained by subtracting the temperature related to detection by the temperature sensor 208 from the saturation temperature at the pressure detected by the pressure sensor 201.
  • FIG. 5 is a diagram showing a flow of processing related to abnormality detection or the like according to Embodiment 1 of the present invention. Based on FIG. 5, the process which the air conditioning apparatus monitoring apparatus 109 (monitoring processing apparatus 104) of this Embodiment performs is demonstrated. Here, a case will be described in which the monitoring processing device 104 performs an abnormality determination process based on operation data in the cooling operation mode of the first air conditioner 101a.
  • a signal is sent from each local controller 102.
  • the communication unit 122 of the monitoring processing device 104 obtains operation data of each air conditioner 101 from the transmitted signal.
  • the operation data is stored in the storage unit 124.
  • the operation data is collected on a daily basis, but the present invention is not limited to this.
  • steady-state operation data is extracted as monitoring data from the transmitted operation data.
  • the determination as to whether to use monitoring data is performed as follows.
  • a steady state parameter for determining whether or not the air conditioner 101 is in a steady state is defined in advance.
  • the driving frequency of the compressor 1 the pressure related to detection by the pressure sensor 201 (high pressure), the pressure related to detection by the pressure sensor 211 (low pressure), the degree of subcooling at the heat source side (pressure sensor 201).
  • the saturation temperature converted from the pressure related to the detection of the temperature-the temperature related to the detection of the temperature sensor 203) and the degree of bypass superheat (the temperature related to the detection of the temperature sensor 213-the temperature related to the detection of the temperature sensor 212) are used as steady-state parameters.
  • the calculation unit 120 calculates a moving average value for detection values (instantaneous values) for 15 minutes for each steady state parameter. Thereafter, if the difference between the moving average value and each instantaneous value is within a predetermined value at each measurement time, for example, it is determined that the steady state parameter at that time is stable. Then, the state when all the steady state determination parameters are determined to be stable is defined as a steady state. Although the predetermined value is used here, it may be determined based on aberration or the like.
  • the calculation and determination as described above are executed for each time, and finally, the operation data at the time determined as the steady state is extracted as the monitoring data for the day.
  • an abnormality detection mode for performing the determination is selected.
  • the abnormality detection mode in the present embodiment is refrigerant amount shortage detection, heat exchanger dirt detection of the heat source side heat exchanger, lock detection of the bypass pressure reduction mechanism 20, or compressor deterioration detection.
  • FIG. 6 is a diagram showing a flow of operation data extraction processing according to Embodiment 1 of the present invention.
  • S4 for example, the same model as the first air conditioner 101a is selected, the second air conditioner 101b having the same heat effect and the processing effect relating to the heat amount, and the index data is obtained from the operation data of the selected second air conditioner 101b.
  • the process which extracts is performed.
  • the selection of the second air conditioner 101b it is determined whether or not the equipment and the like constituting the air conditioner (refrigerant circuit) are under the same conditions. It is not necessary that the condition is within the range (the same range) that can be determined to be the same.
  • the type of refrigerant sealed in the refrigerant circuit is the same. If the type of the refrigerant is different, the operation data is different because the control contents of the devices constituting the refrigerant circuit are different. If it is determined that the refrigerant types are the same, it is determined in S31 whether the specifications of the compressor 1 are the same.
  • the specifications of the compressor 1 are, for example, a compressor cylinder volume, a compression method (scroll method, rotary method, etc.) and the like. That the specifications of the compressor 1 are the same can be regarded as the same conditions regarding the refrigerant flow rate (cooling capacity).
  • the specifications of the heat source side heat exchanger 3 are, for example, a fin shape, an external heat transfer area, an internal heat transfer area, and the like. If it is determined that the specifications of the heat source side heat exchanger 3 are the same, it is further determined in S33 whether the specifications of the heat source side blower 4 are the same.
  • the specifications of the heat source side blower 4 are, for example, a fan shape (such as a propeller fan) and a rotation speed range. It can be considered that the conditions regarding the heat transfer area are the same because the specifications of the heat source side heat exchanger 3 are the same. Moreover, it can be considered that the conditions regarding the air volume are the same because the specifications of the heat source side blower 4 are the same. For this reason, it can be considered that the conditions regarding the heat transfer performance in the heat source side heat exchanger 3 are the same.
  • the second air conditioning apparatus 101b if the refrigerant used is the same and the specifications of the compressor 1, the heat source side heat exchanger 3, and the heat source side blower 4 can be regarded as the same, other equipment (decompression mechanism type, accumulator) Etc.), the amount of heat that can be processed and the processing efficiency are approximately the same. Accordingly, past operation data of the first air conditioner 101a recorded in the recording device 105 is also index data. For example, in the development of an air conditioner, although only a part of the specifications has been changed, it is often released as a different model name.
  • the operation data of the second air conditioner 101b that satisfies the conditions can be used for detecting an abnormality of the first air conditioner 101a. For this reason, the number of operation data that can be referred to in the abnormality detection process can be increased enormously. Therefore, there are many opportunities for detection. In addition, the detection accuracy is improved.
  • the excessive rainfall is, for example, a day when a heavy rain warning or a heavy rain warning is issued in the area where the second air conditioner 101b (the property 107b) is installed.
  • the excessive wind speed is, for example, a day when a strong wind warning or a strong wind warning is issued in the area where the second air conditioner 101b is installed.
  • the weather information provided from an external engine and the operation data are associated with each other and recorded in the recording device 105. Further, for example, it may be determined whether the rainfall amount or the wind speed is excessive from specific numerical values (for example, the rainfall amount 5 mm / h, the wind speed 15 m / s, etc.).
  • the operation data of the second air conditioner 101b that satisfies the above conditions is extracted as index data.
  • the operation data of the second air conditioner 101b that has not become index data can be index data when the abnormality detection process is performed in the other first air conditioner 101a.
  • steady index data in order to extract the same index data as the monitoring data extracted in S2, steady-state operation data (hereinafter referred to as steady index data) is extracted from the index data.
  • FIG. 7 is a diagram showing a relationship between the abnormality detection mode and the detection method according to Embodiment 1 of the present invention.
  • data relating to the change item and the feature amount according to the abnormality detection mode selected in S3 is further extracted from the extracted steady index data.
  • the extracted steady index data includes all operation data such as all temperatures and pressures detected in the selected second air conditioner 101b. Therefore, data relating to change items and feature amounts necessary for abnormality detection is extracted from the steady index data.
  • the feature amount is a parameter that changes as an abnormality occurs.
  • the change item is a parameter that changes even if no abnormality occurs.
  • the feature amount and the change item are different.
  • the procedure for detecting each abnormality will be described in detail.
  • the abnormality detection mode for insufficient refrigerant amount in the refrigerant circuit is selected, for example, comparing the case where the refrigerant amount is insufficient and the case where the refrigerant amount is not insufficient, the degree of condenser subcooling (the detected pressure of the pressure sensor 201) is compared.
  • the difference in the detected temperature of the temperature sensor 203 with respect to the saturation temperature of the first temperature decreases.
  • the degree of supercooling at the outlet of the condenser varies depending on the outside air temperature even if the amount of refrigerant is not reduced.
  • the characteristic amount is the condenser outlet supercooling degree
  • the change item is the outside air temperature.
  • the degree of refrigerant amount is determined by comparing the condenser outlet subcooling degree in the monitoring data with the condenser outlet subcooling degree in the steady index data.
  • the steady index data includes operation data of the second air conditioner 101b.
  • the abnormality detection mode related to the heat source side heat exchanger 3 contamination is selected.
  • the heat transfer performance is deteriorated.
  • the heat source side heat exchanger 3 functions as a condenser by the operation in the cooling operation mode
  • the temperature difference between the condensation temperature and the outside air temperature becomes large.
  • the temperature difference between the condensation temperature and the outside air temperature also changes depending on the outside air temperature. Therefore, when the abnormality detection mode of the heat source side heat exchanger 3 is selected, the characteristic amount is the temperature difference between the condensation temperature and the outside air temperature, and the change item is the outside air temperature.
  • heat source side heat exchange is performed by comparing the temperature difference between the condensation temperature and the outside air temperature in the monitoring data and the temperature difference between the condensation temperature and the outside air temperature in the steady index data under the same conditions of the outside air temperature. Judgment regarding the contamination of the vessel 3 is made. Here, even in the heating operation mode, it is possible to detect the abnormality of the heat source side heat exchanger 3 contamination. At this time, the feature amount is a temperature difference between the evaporation temperature and the outside air temperature.
  • the abnormality detection mode related to the lock of the bypass pressure reducing mechanism 20 is selected. If the valve in the bypass pressure reducing mechanism 20 does not work, the degree of superheat of the refrigerant in the second flow path of the supercooling heat exchanger 11 cannot be controlled to be constant and changes. For example, if the valve opening is fixed in the open state, the degree of superheat increases by 10 ° C. or more. If the valve opening degree is fixed in the closed state, the refrigerant does not pass through the second flow path, so the degree of superheat becomes zero. Therefore, the characteristic amount when the lock abnormality detection mode of the bypass decompression mechanism 20 is selected is the superheat degree of the refrigerant in the supercooling heat exchanger 11. The change item is assumed to be the opening degree of the bypass pressure reducing mechanism 20. By comparing the degree of superheat in the monitoring data with the degree of superheat in the steady index data, a determination is made regarding the lock of the bypass pressure reducing mechanism 20.
  • the feature quantity when the compressor deterioration abnormality detection mode is selected is the discharge temperature of the compressor 1.
  • the change items are the condensation temperature and the evaporation temperature.
  • the compressor temperature is determined by comparing the discharge temperature in the monitoring data with the discharge temperature in the steady index data.
  • the calculation unit 120 calculates the average value of the feature amount data for each change item.
  • the feature amount data is divided by dividing a change item into a range at regular intervals, and an average value in each feature amount data group is calculated.
  • the change item is the outside air temperature
  • the outside air temperature is divided every 4.5 ° C. (..., 20.5 ° C. to 25 ° C., 25.5 ° C. to 30 ° C.,...)
  • the average value is calculated. .
  • FIG. 8 is a diagram showing an example of the relationship between the steady index data and the monitoring data in the feature amount and the change item according to Embodiment 1 of the present invention.
  • the calculation unit 120 calculates a difference value between the average value of the feature values and the monitoring data.
  • the control unit 121 determines whether or not the difference value calculated by the calculation unit 120 deviates by a predetermined value or more. If the control unit 121 determines that the difference is greater than or equal to the predetermined value, the control unit 121 determines that the difference is abnormal and reports that it is abnormal (S10). If the controller 121 determines that the difference is not more than a predetermined value, the controller 121 determines that the difference is normal and issues a notification that the difference is normal (S11).
  • the determination of whether or not there is an abnormality when there is a plurality of monitoring data is not particularly limited. For example, it may be determined that an abnormality is detected when it is determined that even one of them is deviated by a predetermined value or more. Further, if it is determined that all the differences deviate by a predetermined value or more, it may be determined that there is an abnormality.
  • S12 it is determined whether or not processing has been completed for all abnormality detection modes. If it is determined that the process has not been completed, the process returns to S2, an undetected abnormality detection mode is selected, and abnormality detection is performed.
  • the control unit 121 determines whether the difference value between the average value of the feature values and the monitoring data in all abnormality detection modes is within the appropriate difference value. Judge whether. If it is determined that the difference is within the appropriate difference value, the operation data of the first air conditioner 101a is stored in the recording device 105. As described above, by recording the operation data including the monitoring data determined to be within the appropriate difference value, it is possible to record the operation data in which no abnormality has occurred. For this reason, it can be ensured that the index data is a collection of normal operation data, and the reliability of the data can be ensured.
  • the difference value determination threshold value of S13 smaller than the difference value determination threshold value of S9, the reliability of the operation data recorded in the recording device 105 can be improved.
  • the period during which the processing of S13 is performed and the operation data is recorded in the recording device 105 is, for example, one year after installation. If operation data for one year can be recorded, it is possible to record operation data based on a single outdoor temperature and indoor load. For example, even if data is recorded continuously for 3 years and 4 years, there is a possibility that deterioration cannot be determined at the time of aging deterioration. Therefore, in the system of this embodiment, the operation data is recorded until a predetermined period after installation.
  • the operation data of the second air conditioner 101b can be collected and recorded in the recording device 105, and abnormality can be detected from more operation data. .
  • FIG. FIG. 9 is a diagram showing an example of the relationship between the sorting items and the storage location of the operation data according to the second embodiment of the present invention.
  • the storage location of the operation data is sorted based on conditions related to abnormality detection of the air conditioner 101, such as the refrigerant name, the compressor specification, and the like.
  • it may be divided and stored in the recording device 105.
  • the air conditioner monitoring system 100 includes two recording devices 105.
  • Each recording device 105 includes two storage devices 150. Therefore, the storage area of the operation data in the entire system can be divided into four.
  • the monitoring processing device 104 sorts the storage location of the operation data depending on whether the refrigerant type is R32 or R410A and the compression method of the compressor 1 is a rotary method or a scroll method.
  • the operation data of the air conditioner 101 in which the refrigerant type is R32 and the compressor 1 is the rotary type is sorted so as to be stored in the storage device 150a of the recording device 105a.
  • the operation data of the air conditioner 101 in which the refrigerant type is R32 and the compressor 1 is the scroll type is sorted so as to be stored in the storage device 150b of the recording device 105a.
  • the operation data of the air conditioner 101 in which the refrigerant type is R410A and the compressor 1 is the rotary type is sorted so as to be stored in the storage device 150a of the recording device 105b.
  • the operation data of the air conditioner 101 in which the refrigerant type is R410A and the compressor 1 is the scroll type is sorted so as to be stored in the storage device 150b of the recording device 105b.
  • the storage location of the operation data is sorted and stored based on the conditions related to the abnormality detection of the air conditioning apparatus 101.
  • the monitoring processing device 104 extracts operation data or the like
  • the recording device 105 or the like can be specified in advance to access the operation data. For this reason, useless data access can be avoided and the speed of information processing can be increased.
  • by sorting the storage location of the operation data according to the conditions related to abnormality detection that is often performed it is possible to avoid wasteful data access more effectively.
  • FIG. 10 is a diagram illustrating a relationship example between the related matters and the air conditioner according to Embodiment 3 of the present invention.
  • an installer constructor
  • the local controller 102 sends these data to the monitoring processing device 104.
  • the monitoring processing device 104 records in the recording device 105.
  • sorting is performed based on the extension pipe length and the difference in height of the extension pipe length, and the storage location of the operation data of each air conditioner 101 is specified.
  • the monitoring processing device 104 extracts operation data or the like, it is possible to specify the recording device 105 or the like in advance and access the operation data. For this reason, useless data access can be avoided and the speed of information processing can be increased.
  • the control part 121 extracts the operation data of the 2nd air conditioning apparatus 101b of the same classification as the 1st air conditioning apparatus 101a, and determines abnormality detection I do.
  • the operation data is classified according to the number of connected use units 303 in the air conditioner 101 and the capacity of the use side heat exchanger 15 of each use unit 303 and recorded in the recording device 105. Also good. For example, when detecting the above-described abnormality of the lock of the bypass decompression mechanism 20, for example, with respect to the lock of the bypass decompression mechanism 20, the number of use side decompression mechanisms 14 increases as the number of use units 303 increases. For this reason, the sum total of the valve opening degree in the utilization unit 303 becomes large.
  • the operation data in the recording device 105 is classified according to the number of connected usage units 303 and the capacity of the usage side heat exchanger 15 of each usage unit 303.
  • the control part 121 extracts the operation data of the 2nd air conditioning apparatus 101b of the same classification as the 1st air conditioning apparatus 101a, and determines the abnormality detection. Do.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un dispositif de suivi (109) pour un climatiseur qui climatise un espace cible et constitue un circuit de fluide frigorigène qui fait circuler un fluide frigorigène et qui comprend au moins un compresseur (1), un échangeur de chaleur du côté source de chaleur (3), un dispositif à diaphragme et un échangeur de chaleur du côté utilisation. Le dispositif de suivi (109) est pourvu : d'un dispositif d'enregistrement (105) qui enregistre, pour une pluralité de climatiseurs (101), des données de fonctionnement indiquant les états de fonctionnement des climatiseurs (101) ; et d'un dispositif de traitement de suivi (104) qui, avec les spécifications des fluides frigorigènes et des appareils constituant les climatiseurs (101) en tant que conditions, extrait, à partir du dispositif d'enregistrement (105), des données de fonctionnement ayant la même plage de conditions qu'un premier climatiseur (101a), qui est une cible de suivi, et détecte des anomalies par comparaison des données de fonctionnement extraites avec les données de fonctionnement du premier climatiseur (101a).
PCT/JP2015/062807 2015-04-28 2015-04-28 Dispositif et procédé de suivi pour climatiseur WO2016174734A1 (fr)

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JP2017515320A JPWO2016174734A1 (ja) 2015-04-28 2015-04-28 空気調和装置監視装置および方法
PCT/JP2015/062807 WO2016174734A1 (fr) 2015-04-28 2015-04-28 Dispositif et procédé de suivi pour climatiseur
EP15890718.8A EP3290816B1 (fr) 2015-04-28 2015-04-28 Dispositif et procédé de suivi pour climatiseur

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019143928A (ja) * 2018-02-22 2019-08-29 三菱電機株式会社 異常検知装置、異常検知システム、異常検知方法、及び、プログラム
WO2019193714A1 (fr) * 2018-04-05 2019-10-10 三菱電機株式会社 Climatiseur
WO2019220507A1 (fr) * 2018-05-14 2019-11-21 三菱電機株式会社 Système de diagnostic de dysfonctionnement
EP3587946A4 (fr) * 2017-02-27 2020-05-27 Mitsubishi Electric Corporation Climatiseur
JP2020170236A (ja) * 2019-04-01 2020-10-15 Ａｓｓｅｓｔ株式会社 栽培環境判別プログラム
JPWO2020188753A1 (ja) * 2019-03-19 2021-10-14 三菱電機株式会社 室外機及びそれを備える冷凍サイクル装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6887979B2 (ja) * 2018-09-28 2021-06-16 ダイキン工業株式会社 冷媒漏洩判定装置、この冷媒漏洩判定装置を備える冷凍装置、及び冷媒漏洩判定方法
US12007153B2 (en) 2020-05-20 2024-06-11 Mitsubishi Electric Corporation Refrigeration cycle apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004133553A (ja) * 2002-10-08 2004-04-30 Toshiba Corp 設備診断装置
JP2005207644A (ja) * 2004-01-21 2005-08-04 Mitsubishi Electric Corp 機器診断装置、冷凍サイクル装置、流体回路診断方法、機器監視システム、冷凍サイクル監視システム
JP2005309724A (ja) * 2004-04-21 2005-11-04 Tokyo Gas Co Ltd 異常診断システム及び異常診断方法
JP2006275411A (ja) * 2005-03-29 2006-10-12 Daikin Ind Ltd 異常検知システム
JP2010014323A (ja) * 2008-07-03 2010-01-21 Hitachi Ltd 冷熱供給システムの劣化診断装置、劣化診断方法、及び劣化診断システム
JP2010107189A (ja) * 2008-09-30 2010-05-13 Daikin Ind Ltd 冷凍装置の診断方法、冷凍装置の診断装置、及び冷凍装置
US20100324741A1 (en) * 2009-06-18 2010-12-23 Johnson Controls Technology Company Systems and methods for fault detection of air handling units
US20140163744A1 (en) * 2012-12-07 2014-06-12 Liebert Corporation Fault detection in a cooling system with a plurality of identical cooling circuits
US20140297208A1 (en) * 2011-02-28 2014-10-02 Emerson Electric Co. Remote HVAC Monitoring And Diagnosis

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6701727B2 (en) * 2001-10-12 2004-03-09 Hitachi Building Systems Co., Ltd. Apparatus and method for managing heat source unit for air conditioner
JP5289109B2 (ja) * 2009-03-09 2013-09-11 三菱電機株式会社 空気調和装置
EP2913601A4 (fr) * 2012-10-25 2016-07-06 Mitsubishi Electric Corp Système de contrôle
US20140228983A1 (en) * 2013-02-08 2014-08-14 Trane International Inc. HVAC Customer Support System

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004133553A (ja) * 2002-10-08 2004-04-30 Toshiba Corp 設備診断装置
JP2005207644A (ja) * 2004-01-21 2005-08-04 Mitsubishi Electric Corp 機器診断装置、冷凍サイクル装置、流体回路診断方法、機器監視システム、冷凍サイクル監視システム
JP2005309724A (ja) * 2004-04-21 2005-11-04 Tokyo Gas Co Ltd 異常診断システム及び異常診断方法
JP2006275411A (ja) * 2005-03-29 2006-10-12 Daikin Ind Ltd 異常検知システム
JP2010014323A (ja) * 2008-07-03 2010-01-21 Hitachi Ltd 冷熱供給システムの劣化診断装置、劣化診断方法、及び劣化診断システム
JP2010107189A (ja) * 2008-09-30 2010-05-13 Daikin Ind Ltd 冷凍装置の診断方法、冷凍装置の診断装置、及び冷凍装置
US20100324741A1 (en) * 2009-06-18 2010-12-23 Johnson Controls Technology Company Systems and methods for fault detection of air handling units
US20140297208A1 (en) * 2011-02-28 2014-10-02 Emerson Electric Co. Remote HVAC Monitoring And Diagnosis
US20140163744A1 (en) * 2012-12-07 2014-06-12 Liebert Corporation Fault detection in a cooling system with a plurality of identical cooling circuits

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3290816A4 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3587946A4 (fr) * 2017-02-27 2020-05-27 Mitsubishi Electric Corporation Climatiseur
JP7204328B2 (ja) 2018-02-22 2023-01-16 三菱電機株式会社 異常検知装置、異常検知システム、異常検知方法、及び、プログラム
JP2019143928A (ja) * 2018-02-22 2019-08-29 三菱電機株式会社 異常検知装置、異常検知システム、異常検知方法、及び、プログラム
JPWO2019193714A1 (ja) * 2018-04-05 2021-01-07 三菱電機株式会社 空気調和機
EP3779305A4 (fr) * 2018-04-05 2021-03-24 Mitsubishi Electric Corporation Climatiseur
EP3896354A1 (fr) * 2018-04-05 2021-10-20 Mitsubishi Electric Corporation Appareil de climatisation
EP3896353A1 (fr) * 2018-04-05 2021-10-20 Mitsubishi Electric Corporation Appareil de climatisation
US11204184B2 (en) 2018-04-05 2021-12-21 Mitsubishi Electric Corporation Air-conditioning apparatus with dirt detection
WO2019193714A1 (fr) * 2018-04-05 2019-10-10 三菱電機株式会社 Climatiseur
JPWO2019220507A1 (ja) * 2018-05-14 2020-12-10 三菱電機株式会社 故障診断システム
WO2019220507A1 (fr) * 2018-05-14 2019-11-21 三菱電機株式会社 Système de diagnostic de dysfonctionnement
JPWO2020188753A1 (ja) * 2019-03-19 2021-10-14 三菱電機株式会社 室外機及びそれを備える冷凍サイクル装置
JP7282157B2 (ja) 2019-03-19 2023-05-26 三菱電機株式会社 室外機及びそれを備える冷凍サイクル装置
JP2020170236A (ja) * 2019-04-01 2020-10-15 Ａｓｓｅｓｔ株式会社 栽培環境判別プログラム

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