WO2019220507A1 - 故障診断システム - Google Patents
故障診断システム Download PDFInfo
- Publication number
- WO2019220507A1 WO2019220507A1 PCT/JP2018/018554 JP2018018554W WO2019220507A1 WO 2019220507 A1 WO2019220507 A1 WO 2019220507A1 JP 2018018554 W JP2018018554 W JP 2018018554W WO 2019220507 A1 WO2019220507 A1 WO 2019220507A1
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- Prior art keywords
- abnormality
- air conditioner
- diagnosis
- state
- unit
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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
- F24F11/62—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
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/027—Condenser control arrangements
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0292—Control issues related to reversing valves
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0293—Control issues related to the indoor fan, e.g. controlling speed
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0314—Temperature sensors near the indoor heat exchanger
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0315—Temperature sensors near the outdoor heat exchanger
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
Definitions
- the present invention relates to a failure diagnosis system for diagnosing failures and signs of failure of an air conditioner.
- Air conditioners that control the air environment of spaces such as rooms are widespread and are indispensable for maintaining the comfort of spaces. Therefore, the failure of the air conditioner is directly connected to the user's discomfort.
- failure of air conditioners installed in server rooms and refrigerated warehouses can lead to fatal losses in business. Therefore, in recent years, in addition to periodic maintenance of the air conditioner, failure diagnosis for diagnosing a failure of the air conditioner and a sign of the failure is regarded as important.
- failure diagnosis of an air conditioner is performed by measuring the state of the refrigeration cycle during normal operation, and by measuring the state of the refrigeration cycle during failure diagnosis operation that fixes the control of the actuator, , Is adopted.
- a method performed during failure diagnosis operation generally has higher accuracy of failure diagnosis than a method performed during normal operation.
- the method performed during the failure diagnosis operation needs to fix the actuator control periodically even when there is no abnormality in the air conditioner. As a result, power consumption increases and the comfort of the space may decrease.
- the conventional failure diagnosis system performs preliminary diagnosis to determine the possibility of failure during normal operation, and performs failure diagnosis operation when it is determined that there is a possibility of failure in the preliminary diagnosis.
- the conventional failure diagnosis system performs preliminary diagnosis to determine the possibility of failure during normal operation, and performs failure diagnosis operation when it is determined that there is a possibility of failure in the preliminary diagnosis.
- the preliminary diagnosis in the failure diagnosis system of Patent Document 1 is performed based on a small amount of data, and is adjusted so that it is easily determined that there is a possibility of failure.
- the failure diagnosis system of Patent Document 1 has low accuracy of preliminary diagnosis, failure diagnosis operation frequently occurs, so that it is not possible to reduce power consumption and improve space comfort.
- data obtained in the preliminary diagnosis is not used for failure diagnosis, so the efficiency and accuracy of failure diagnosis cannot be increased.
- the present invention has been made to solve the above-described problems, and an object thereof is to provide a failure diagnosis system that performs failure diagnosis with high accuracy and efficiency without impairing comfort.
- a failure diagnosis system is a failure diagnosis system for diagnosing the state of an air conditioner including a refrigerant circuit in which refrigerant circulates, and a state detection unit that detects the state of the refrigerant in the refrigerant circuit as state data; Normal operation to determine the presence or absence of abnormality of the air conditioner using the control device that controls the actuator of the air conditioner and the control data indicating the control data by the control data during the normal operation of the air conditioner An abnormality diagnosis unit that performs abnormality diagnosis, and when the abnormality diagnosis unit determines that there is an abnormality in the air conditioner, the control value of the actuator of the air conditioner is changed to obtain state data and control data Using the obtained state data and control data after the change of the control value and the state data and control data before the change of the control value, the cause of the abnormality of the air conditioner is specified. And performs abnormal factor specific diagnosis.
- the control value of the actuator is changed.
- the factor of abnormality of an air conditioner is specified using the data before a control value change, and the data after a control value change. Therefore, the accuracy of determining whether there is an abnormality can be increased and the cause of the abnormality can be identified quickly and accurately, so that failure diagnosis can be performed with high accuracy and efficiency without impairing comfort.
- FIG. 1 is a configuration diagram of a failure diagnosis system according to Embodiment 1 of the present invention.
- FIG. It is a block diagram which shows the functional structure of the failure diagnosis system of FIG. It is a graph for demonstrating an example of the determination process by the stable driving
- FIG. 1 is a configuration diagram of a failure diagnosis system according to Embodiment 1 of the present invention.
- the failure diagnosis system 800 includes an air conditioning system 600 and a server device 700.
- the air conditioning system 600 includes an air conditioner 100, a management device 400, and an information terminal 500.
- the failure diagnosis system 800 diagnoses the state of the air conditioner 100.
- the air conditioner 100 adjusts the air environment such as the temperature, humidity, and cleanliness of the air in the air-conditioned space such as a room.
- the air conditioner 100 includes an outdoor unit 110 and an indoor unit 111.
- the outdoor unit 110 includes a compressor 101, an outdoor heat exchanger 102, a first expansion valve 106a, a second expansion valve 106b, a four-way valve 108, and a receiver 109.
- the indoor unit 111 has an indoor heat exchanger 103. That is, in the air conditioner 100, the compressor 101, the outdoor heat exchanger 102, the first expansion valve 106a, the receiver 109, the second expansion valve 106b, and the indoor heat exchanger 103 are connected via the refrigerant pipe R. Is provided with a circulating refrigerant circuit 200.
- the outdoor unit 110 has an outdoor fan 104 attached to the outdoor heat exchanger 102 and promoting heat transfer of the outdoor heat exchanger 102.
- the outdoor unit 110 includes a control device 140, a communication device 150, and a failure diagnosis device 300.
- the indoor unit 111 includes an indoor fan 105 that is attached to the indoor heat exchanger 103 and promotes heat transfer of the indoor heat exchanger 103.
- the air conditioner 100 includes refrigerant temperature sensors 121 to 125 and air temperature sensors 131 to 132.
- the refrigerant temperature sensors 121 to 123 and the air temperature sensor 131 are provided in the outdoor unit 110, and the refrigerant temperature sensors 124 and 125 and the air temperature sensor 132 are provided in the indoor unit 111.
- the compressor 101 is driven by an inverter, for example, and compresses and discharges the sucked refrigerant.
- the outdoor heat exchanger 102 is composed of, for example, a fin-and-tube heat exchanger, and exchanges heat between air and a refrigerant.
- the four-way valve 108 is connected to the discharge side of the compressor 101, that is, to the outlet of the compressor 101 via the refrigerant pipe R.
- the four-way valve 108 switches the refrigerant flow path in the refrigerant circuit 200.
- the connection direction of the four-way valve 108 is switched by the control device 140, and the direction of the refrigerant flowing through the refrigerant circuit 200 is reversed.
- the four-way valve 108 is in the connection direction indicated by the solid line in FIG. 1 during cooling operation in which cold heat is supplied to the indoor unit 111. Therefore, the refrigerant during the cooling operation is the refrigerant 101 in the order of the compressor 101, the outdoor heat exchanger 102, the first expansion valve 106a, the receiver 109, the second expansion valve 106b, the indoor heat exchanger 103, and the compressor 101. Circulate. At this time, the outdoor heat exchanger 102 functions as a condenser, and the indoor heat exchanger 103 functions as an evaporator.
- the four-way valve 108 has a connection direction indicated by a broken line in FIG. Therefore, the refrigerant during the heating operation is the refrigerant 101 in the order of the compressor 101, the indoor heat exchanger 103, the second expansion valve 106b, the receiver 109, the first expansion valve 106a, the outdoor heat exchanger 102, and the compressor 101. Circulate. At this time, the indoor heat exchanger 103 functions as a condenser, and the outdoor heat exchanger 102 functions as an evaporator.
- the first expansion valve 106a and the second expansion valve 106b are, for example, electronic expansion valves, and expand the refrigerant by decompressing it.
- the first expansion valve 106 a has one end connected to the outdoor heat exchanger 102 and the other end connected to the receiver 109.
- the second expansion valve 106 b has one end connected to the receiver 109 and the other end connected to the indoor heat exchanger 103.
- the receiver 109 temporarily stores the liquid refrigerant.
- the receiver 109 is connected to the first expansion valve 106a and the second expansion valve 106b via the refrigerant pipe R.
- a part of the refrigerant pipe R connecting the inlet of the compressor 101 and the four-way valve 108 passes through the receiver 109. Therefore, the refrigerant flowing through the refrigerant pipe R in the receiver 109 exchanges heat with the refrigerant around the refrigerant pipe R in the receiver 109.
- the indoor heat exchanger 103 is composed of, for example, a fin-and-tube heat exchanger, and exchanges heat between air and the refrigerant.
- the refrigerant temperature sensor 121 is provided on the discharge side of the compressor 101 and measures the temperature of the refrigerant discharged from the compressor 101.
- the refrigerant temperature sensor 122 is provided in the outdoor heat exchanger 102 and measures the temperature of the refrigerant flowing through the outdoor heat exchanger 102 as the outdoor refrigerant temperature.
- the refrigerant temperature sensor 123 is provided in the refrigerant pipe R between the outdoor heat exchanger 102 and the first expansion valve 106a, and measures the temperature of the refrigerant flowing between the outdoor heat exchanger 102 and the first expansion valve 106a. .
- the refrigerant temperature sensor 124 is provided in the indoor heat exchanger 103 and measures the temperature of the refrigerant flowing through the indoor heat exchanger 103 as the indoor refrigerant temperature.
- the refrigerant temperature sensor 125 is provided in the refrigerant pipe R between the indoor heat exchanger 103 and the second expansion valve 106b, and measures the temperature of the refrigerant flowing between the indoor heat exchanger 103 and the second expansion valve 106b. .
- the air temperature sensor 131 measures the outside air temperature, which is the temperature of air exchanged with the refrigerant flowing through the outdoor heat exchanger 102.
- the air temperature sensor 132 measures the indoor temperature, which is the temperature of the air that exchanges heat with the refrigerant flowing through the indoor heat exchanger 103.
- the control device 140 based on outputs from the refrigerant temperature sensors 121 to 125 and the air temperature sensors 131 to 132, the compressor 101, the outdoor fan 104, the indoor fan 105, the first expansion valve 106a, and the second expansion valve 106b. Control the actuator. That is, FIG. 1 illustrates the compressor 101, the outdoor fan 104, the indoor fan 105, the first expansion valve 106a, and the second expansion valve 106b as actuators of the air conditioner 100.
- the control device 140 obtains the control value of the actuator of the air conditioner 100 based on the target values of the temperature and humidity of the air-conditioning target space and the measurement data obtained by each sensor, Control the behavior.
- the control value of the actuator of the air conditioner 100 includes the operating frequency of the compressor 101, the rotation speed of the outdoor fan 104 and the indoor fan 105, the opening degree of the first expansion valve 106a and the second expansion valve 106b, and the like.
- the control device 140 outputs control data indicating the control content for each actuator to the stable operation determination unit 310 and the failure diagnosis device 300.
- the communication device 150 serves as an interface when the control device 140 and the failure diagnosis device 300 communicate with an external device.
- the communication device 150 may perform communication via the information terminal 500 when communicating with the server device 700.
- the communication device 150 communicates with the information terminal 500 by a short-range wireless communication method such as WiFi (registered trademark, the same applies hereinafter) or Bluetooth (registered trademark, the same applies hereinafter).
- the information terminal 500 becomes a relay device that transmits and receives a signal passing through the telecommunication line 900 that is a network such as the Internet, and communicates with the server device 700 connected to the telecommunication line 900.
- the management device 400 is connected to the control device 140 and the communication device 150 of the air conditioner 100 in a wired or wireless manner, and manages the air conditioner 100.
- the management of the air conditioner 100 includes a process of receiving an operation on the air conditioner 100 and transmitting the received operation content to the control device 140. That is, the management device 400 is connected to the control device 140 so as to be communicable.
- the management device 400 is connected to the failure diagnosis device 300 and the information terminal 500 via the communication device 150 so as to be communicable.
- a centralized control device that manages one or a plurality of air conditioners 100 in addition to a remote controller for operating the air conditioner 100 is assumed. That is, the management device 400 is used when the user operates the air conditioner 100 or when the user grasps the operation state of the air conditioner 100.
- the information terminal 500 is a communication terminal such as a mobile phone, a smartphone, a tablet PC (Personal Computer), a notebook PC, or a desktop PC.
- the information terminal 500 is communicably connected to the control device 140 and the failure diagnosis device 300 via the communication device 150.
- the server device 700 is a storage processing device provided outside the air conditioner 100 and provided by a cloud service, for example. That is, the server device 700 is a cloud server based on cloud computing. Server device 700 is connected to information terminal 500 through electric communication line 900 so as to be communicable. The server device 700 is communicably connected to the control device 140, the failure diagnosis device 300, and the management device 400 via the telecommunication line 900 and the communication device 150.
- the server device 700 may be a physical server such as a web server.
- FIG. 2 is a block diagram showing a functional configuration of the failure diagnosis system of FIG.
- FIG. 3 is a graph for explaining an example of determination processing by the stable operation determination unit in FIG. 2.
- FIG. 4 is a graph for explaining another example of the determination process by the stable operation determination unit of FIG.
- the functional configuration of the failure diagnosis system 800 will be described with reference to FIGS.
- the state detection unit 120 detects the state of the refrigerant in the refrigerant circuit 200 as state data.
- the state detection unit 120 includes refrigerant temperature sensors 121 to 125 and air temperature sensors 131 to 132 as shown in FIG.
- the expansion means 106 includes a first expansion valve 106a and a second expansion valve 106b.
- the failure diagnosis apparatus 300 diagnoses the state of the air conditioner 100 using the state data and the control data.
- the failure diagnosis apparatus 300 includes a stable operation determination unit 310, a storage unit 320, and an abnormality diagnosis unit 330. That is, in the first embodiment, the stable operation determination unit 310, the storage unit 320, and the abnormality diagnosis unit 330 are installed inside the air conditioner 100.
- the stable operation determination unit 310 acquires various data included in signals transmitted from the control device 140, the refrigerant temperature sensors 121 to 125, and the air temperature sensors 131 to 132. That is, the stable operation determination unit 310 acquires control data from the control device 140. In addition, the stable operation determination unit 310 acquires the state data detected by the state detection unit 120. The stable operation determination unit 310 may acquire the state data via the control device 140, or may acquire the state data directly from the state detection unit 120. The stable operation determination unit 310 determines whether or not the operation state during normal operation of the air conditioner 100 to be diagnosed is stable based on the control data and the state data. Hereinafter, the process of determining whether or not the operation state during normal operation of the air conditioner 100 is stable is referred to as a stable operation determination process.
- the normal operation is a cooling operation or a heating operation for the purpose of air conditioning in the air-conditioning target space.
- the normal operation means a state in which the cooling operation or the heating operation is performed for the purpose of air conditioning in the air-conditioning target space.
- the control device 140 controls the operating frequency of the compressor 101 so that the temperature and humidity of the air-conditioning target space are close to the target values.
- the defrosting operation for removing frost generated in the outdoor heat exchanger 102 and the operation under the failure factor specifying control for specifying the failure factor of the air conditioner 100 are not included in the normal operation.
- the stable operation determination unit 310 acquires the outdoor refrigerant temperature measured by the refrigerant temperature sensor 122 and the outdoor air temperature measured by the air temperature sensor 131. Then, the stable operation determination unit 310 obtains the first temperature difference ⁇ Tc by subtracting the outside air temperature from the outdoor refrigerant temperature. That is, the first temperature difference ⁇ Tc is a temperature difference between the refrigerant temperature and the air temperature in the outdoor heat exchanger 102. Moreover, the stable operation determination unit 310 acquires the indoor temperature measured by the air temperature sensor 132 and the indoor refrigerant temperature measured by the refrigerant temperature sensor 124.
- the stable operation determination unit 310 obtains the second temperature difference ⁇ Te by subtracting the indoor refrigerant temperature from the indoor temperature. That is, the second temperature difference ⁇ Te is a temperature difference between the refrigerant temperature and the air temperature in the indoor heat exchanger 103.
- the storage unit 320 stores a first determination range Rc compared with the first temperature difference ⁇ Tc and a second determination range Re compared with the second temperature difference ⁇ Te in the stable operation determination process. ing.
- the storage unit 320 stores a stability determination period ⁇ t set according to the specifications of the air conditioner 100, the installation environment, and the like.
- the stable operation determination unit 310 analyzes changes in the first temperature difference ⁇ Tc and the second temperature difference ⁇ Te over time in the stability determination period ⁇ t. That is, the stable operation determination unit 310 analyzes fluctuations in the first temperature difference ⁇ Tc and the second temperature difference ⁇ Te for each determination period determined by a clock of the microcomputer or the like.
- the determination cycle is set shorter than the stability determination period ⁇ t, but may be set longer than the stability determination period ⁇ t.
- the stable operation determination unit 310 determines whether or not the fluctuation range Tcw of the first temperature difference ⁇ Tc between the time when the analysis is started and the stability determination period ⁇ t is within the first determination range Rc. In addition, the stable operation determination unit 310 determines whether or not the fluctuation range Tew of the second temperature difference ⁇ Te between the time when the analysis is started and the stability determination period ⁇ t is within the second determination range Re. Then, the stable operation determination unit 310 continues the state where the first temperature difference ⁇ Tc is within the first determination range Rc and the second temperature difference ⁇ Te is within the second determination range Re for the stability determination period ⁇ t. When it is determined that the operating state of the air conditioner 100 is stable.
- the stability determining period ⁇ t from the time t 01 to time t 02, the fluctuation range Tcw of the first temperature difference ⁇ Tc is not settled in the first determination range Rc, and the second temperature difference ⁇ Te
- the fluctuation range Tew is not within the second determination range Re. Therefore, stable operation determination unit 310, at time t 02, determines that the operation state of the air conditioner 100 is not stable.
- the variation range Tcw of the first temperature difference ⁇ Tc is within the first determination range Rc
- the variation range Tew of the second temperature difference ⁇ Te is the second determination. It is within the range Re.
- the first determination range Rc and the second determination range Re may be fixed regions set according to the specifications of the air conditioner 100 and the installation environment, respectively. That is, the storage unit 320 may store an outdoor lower limit threshold Lc that is a lower limit temperature of the first determination range Rc and an outdoor upper limit threshold Hc that is an upper limit temperature of the first determination range Rc. The storage unit 320 may store an indoor lower limit threshold Le that is a lower limit temperature of the second determination range Re and an indoor upper limit threshold He that is an upper limit temperature of the second determination range Re.
- the first temperature difference ⁇ Tc fits in the first determination range Rc, and the second temperature difference ⁇ Te falls within the second determination range Re.
- stable operation determination unit 310 at time t 2, the determining the operation state of the air conditioner 100 is stable.
- the stable operation determination unit 310 does not depend on the change in the second temperature difference ⁇ Te, and the air conditioner is in a state where the first temperature difference ⁇ Tc remains within the first determination range Rc for the stability determination period ⁇ t. You may determine with the driving
- the stable operation determination unit 310 performs the operation of the air conditioner 100 when the second temperature difference ⁇ Te remains within the second determination range Re for the stability determination period ⁇ t regardless of the first temperature difference ⁇ Tc. It may be determined that the operating state is stable.
- the stable operation determination unit 310 also determines whether or not the operation state of the air conditioner 100 is stable using the measurement data from each sensor in the same manner as described above even during the heating operation.
- the stable operation determination unit 310 determines that the operation state of the air conditioner 100 is stable in the stable operation determination process during normal operation, the stable operation determination unit 310 stores the control data and state data at that time as operation data. Store in the unit 320. In the operation data, the operation state of the air conditioner 100 appears.
- the stable operation determination unit 310 may store the operation data in the storage unit 701 of the server device 700.
- the abnormality diagnosis unit 330 performs failure diagnosis of the air conditioner 100 to be diagnosed based on various data included in signals sent from the control device 140, the refrigerant temperature sensors 121 to 125, and the air temperature sensors 131 to 132. Do. That is, the abnormality diagnosis unit 330 performs a normal operation abnormality diagnosis that determines whether there is an abnormality in the air conditioner 100 based on the state data and the control data during the normal operation of the air conditioner 100. In addition, when the abnormality diagnosis unit 330 determines that the air conditioner 100 is abnormal, the abnormality diagnosis unit 330 changes the control value of the actuator of the air conditioner 100 to acquire the state data and the control data. And the abnormality diagnosis part 330 performs the abnormality factor specific diagnosis which specifies the factor of the abnormality of the air conditioner 100 using the acquired state data and control data, and the state data and control data before the change of the control value. .
- the abnormality diagnosis unit 330 performs normal operation abnormality diagnosis and abnormality factor identification diagnosis in a state space determined by the refrigerant pressure and enthalpy.
- the state space corresponds to a ph diagram set on a coordinate plane with the refrigerant pressure and enthalpy as axes.
- the abnormality diagnosis unit 330 determines whether the air conditioner 100 is abnormal using the state data and the control data when the stable operation determination unit 310 determines that the operation state is stable.
- the abnormality diagnosis unit 330 according to the first embodiment acquires state data and control data when the stable operation determination unit 310 determines that the operation state of the air conditioner 100 is stable. And the abnormality diagnosis part 330 determines the presence or absence of abnormality of the air conditioner 100 using the acquired state data and control data.
- the abnormality diagnosis unit 330 obtains state space data representing the state of the air conditioner 100 on the state space using the state data and the control data in the normal operation abnormality diagnosis. In addition, the abnormality diagnosis unit 330 obtains state space data using the state data and control data after the change of the control value in the abnormality factor identification diagnosis. Then, the abnormality diagnosis unit 330 compares the state space data after the change of the control value with the state space data obtained by the normal operation abnormality diagnosis, and identifies the cause of the abnormality of the air conditioner 100.
- the state space data includes the refrigerant state information x and the normal region X.
- the refrigerant state information x is information indicating the state of the refrigerant at a specific location in the refrigerant circuit 200.
- the normal region X is information on a region where the refrigerant state information x exists during normal operation of the air conditioner 100. That is, the normal region X is information on a region in the state space where the refrigerant state information x exists when there is no abnormality in the air conditioner 100, that is, when there is no abnormality in each actuator, each sensor, and the like.
- the abnormality diagnosis unit 330 compares the refrigerant state information x after the change of the control value with the refrigerant state information x obtained by the normal operation abnormality diagnosis, and causes the abnormality of the air conditioner 100. Is identified.
- causes of abnormality of the air conditioner 100 include refrigerant amount abnormality, heat exchange deterioration, filter, that is, compressor abnormality, liquid back (liquid refrigerant compression abnormality), overcurrent, piping, that is, LEV lock (expansion valve sticking), fan There are locks.
- the refrigerant amount abnormality indicates a shortage or excess of the refrigerant amount in the refrigerant circuit 200.
- the heat exchange deterioration means that an abnormality such as deterioration has occurred in at least one of the outdoor heat exchanger 102 and the indoor heat exchanger 103.
- the filter that is, a state where the filter provided at the suction port of the air conditioner 100 is clogged.
- the compressor abnormality means that an abnormality has occurred in the compressor 101.
- the liquid back indicates a state in which the liquid refrigerant returns to the compressor 101.
- the overcurrent refers to an excessive current flowing through the actuator of the air conditioner 100.
- the pipe clogging refers to a state in which the refrigerant pipe R is clogged with the refrigerant flow.
- LEV lock refers to a state in which an abnormality has occurred in at least one of the first expansion valve 106a and the second expansion valve 106b.
- the fan lock refers to a state in which an abnormality has occurred in at least one of the outdoor fan 104 and the indoor fan 105.
- the abnormality diagnosis unit 330 includes a cycle state calculation unit 331, a normal region calculation unit 332, a diagnosis processing unit 333, and an output processing unit 334.
- the cycle state calculation unit 331 obtains the refrigerant state information x using the operation data acquired from the state detection unit 120 and the control device 140 or the operation data stored in the storage unit 320.
- the refrigerant state information x is given by the refrigerant pressure and enthalpy.
- the normal region calculation means 332 obtains the normal region X using the operation data acquired from the state detection unit 120 and the control device 140 or the operation data stored in the storage unit 320 or the storage unit 701.
- the normal area calculation means 332 obtains the normal area X using the state data and control data after the control value is changed in the abnormality factor identification diagnosis.
- the normal region calculating unit 332 calculates a normal region X corresponding to each of the plurality of refrigerant state information x.
- the normal area calculation means 332 may obtain the normal area X by further using the design specification information of the air conditioner 100. In this way, a more appropriate normal region X can be obtained, and the accuracy of information displayed on the display unit is increased, so that the diagnostic accuracy by the user can be increased.
- the diagnosis processing unit 333 determines whether or not the refrigerant state information x obtained by the cycle state computing unit 331 is included in the normal region X obtained by the normal region computing unit 332 in the normal operation abnormality diagnosis.
- the determination as to whether the refrigerant state information x is included in the normal region X corresponds to the determination as to whether an abnormality has occurred in the air conditioner 100.
- the diagnosis processing means 333 compares the state space data obtained by the normal operation abnormality diagnosis with the state space data after the change of the control value in the abnormality factor identification diagnosis, and identifies the cause of the abnormality of the air conditioner 100. To do.
- the diagnosis processing unit 333 includes the refrigerant state information x obtained by the cycle state calculating unit 331 after the change of the control value, and the refrigerant state information x obtained by the cycle state calculating unit 331 in the normal operation abnormality diagnosis. Are compared, and the cause of the abnormality of the air conditioner 100 is specified.
- the output processing means 334 causes at least one of the management device 400 and the information terminal 500 to output the result of specifying the cause of the abnormality.
- the output processing unit 334 transmits factor specifying information indicating the result of specifying the cause of abnormality to at least one of the management device 400 and the information terminal 500.
- the output processing unit 334 uses the refrigerant state information x obtained by the cycle state calculating unit 331 in the normal operation abnormality diagnosis and the refrigerant state information x after the change of the control value, among the management device 400 and the information terminal 500. At least one is displayed. That is, the output processing unit 334 generates display data for displaying the refrigerant state information x before and after the change of the control value on the ph diagram. Then, the output processing means 334 transmits the generated display data to at least one of the management device 400 and the information terminal 500 via the communication device 150.
- the output processing means 334 may display the state space data before the change of the control value and the state space data after the change of the control value on at least one of the management device 400 and the information terminal 500. In this case, the output processing unit 334 generates display data for displaying the refrigerant state information x and the normal region X before and after the change of the control value on the ph diagram.
- the storage unit 320 stores various data used for the state diagnosis of the air conditioner 100 together with the operation program of the failure diagnosis apparatus 300. For example, the storage unit 320 stores information on one or a plurality of calculation coefficients included in the calculation expression for calculating the normal region X by the normal region calculation unit 332. The storage unit 320 stores information on initial calculation coefficients that are determined in advance at the time of product shipment.
- the server device 700 includes a storage unit 701, a data processing unit 702, and a server communication unit 703.
- the storage unit 701 stores various data included in signals sent from the control device 140, the refrigerant temperature sensors 121 to 125, and the air temperature sensors 131 to 132, state space data, and diagnosis results from the abnormality diagnosis unit 330 in the past. Memorize for a certain period. The fixed period during which the server apparatus 700 accumulates data can be changed as appropriate.
- the management apparatus 400 includes an input unit 410, an output unit 420, and an output control unit 430.
- the output unit 420 includes a display unit 421 and a notification unit 422.
- the input unit 410 includes operation buttons and the like, and accepts an operation by a user.
- the input unit 410 transmits an operation signal indicating the operation content by the user to the control device 140 or the failure diagnosis device 300.
- the input unit 410 transmits a diagnosis request signal to the failure diagnosis apparatus 300 when an operation requesting execution of the state diagnosis of the air conditioner 100 is received.
- the display unit 421 is formed of, for example, a liquid crystal display (LCD) and has a function of displaying the refrigerant state information x and the normal region X.
- the notification unit 422 includes a speaker and outputs sound or sound.
- the output control unit 430 causes the display unit 421 to display a diagnostic image including the refrigerant state information x and the normal region X based on the display data transmitted from the failure diagnosis apparatus 300.
- the management apparatus 400 is installed with an image display program for displaying a diagnostic image based on the display data.
- the output control unit 430 displays the refrigerant state information x and the normal region X on the ph diagram, or the refrigerant on the ph diagram.
- the diagnostic image on which the state information x is displayed is displayed on the display unit 421.
- the result of specifying the cause of abnormality by the diagnostic processing unit 333 is output from at least one of the display unit 421 and the notification unit 422.
- the information terminal 500 includes an input unit 510, an output unit 520, and an output control unit 530.
- the output unit 520 includes a display unit 521 and a notification unit 522.
- the input unit 510 includes operation buttons and the like, and accepts an operation by the user.
- the input unit 510 transmits an operation signal indicating the operation content by the user to the failure diagnosis apparatus 300.
- the input unit 510 transmits a diagnosis request signal to the failure diagnosis apparatus 300 when an operation requesting execution of the state diagnosis of the air conditioner 100 is received.
- the display unit 521 includes a liquid crystal display, for example, and has a function of displaying the refrigerant state information x and the normal region X.
- the notification unit 522 includes a speaker and outputs sound or sound.
- the output control unit 530 causes the display unit 521 to display a diagnostic image including the refrigerant state information x and the normal region X based on the display data transmitted from the failure diagnosis apparatus 300.
- an image display program for displaying a diagnostic image based on display data is installed in the information terminal 500.
- the output control unit 530 displays a diagnostic image in which the refrigerant state information x and the normal region X are displayed on the ph diagram, or the refrigerant on the ph diagram.
- the diagnostic image on which the state information x is displayed is displayed on the display unit 521.
- the result of specifying the cause of abnormality by the diagnostic processing unit 333 is output from at least one of the display unit 521 and the notification unit 522.
- the server device 700 is a database that stores and accumulates various data such as failure diagnosis result data obtained by processing by the abnormality diagnosis unit 330.
- the server device 700 also has a function of performing various arithmetic processes based on the stored data.
- the server device 700 includes a storage unit 701, a data processing unit 702, and a server communication unit 703.
- the server communication unit 703 serves as an interface when a device in the server device 700 such as the data processing unit 702 communicates with an external device via the electric communication line 900, and performs signal conversion and the like.
- the storage unit 701 stores state data, control data, a diagnosis result by the abnormality diagnosis unit 330, and the like as data.
- the data processing unit 702 communicates with an external device via the server communication unit 703 and causes the storage unit 701 to store data acquired from the external device.
- the data processing unit 702 calculates calculation coefficients for calculation of the normal region X from the state data, control data, diagnosis result data from the failure diagnosis apparatus 300, and the like, and periodically updates the calculation coefficients. Good. That is, the data processing unit 702 may periodically calculate calculation coefficients and transmit the calculated calculation coefficients to the failure diagnosis apparatus 300. Then, the failure diagnosis apparatus 300 may rewrite the calculation coefficient in the storage unit 320 with the calculation coefficient transmitted from the data processing unit 702.
- FIG. 5 is an explanatory diagram when the air conditioner is in a normal state among the refrigerant state information and the display example of the normal region in the first embodiment of the present invention.
- FIG. 5 illustrates a diagnostic image in which the refrigerant state information x and the normal region X are displayed on the ph diagram.
- FIG. 5 shows a saturation line S composed of a saturated liquid line and a saturated vapor line, a refrigeration cycle figure Cf, an isothermal line Tout corresponding to the outdoor temperature, and an isothermal line Tin corresponding to the indoor temperature. ing.
- the cycle state calculation unit 331 calculates refrigerant state information x for each of three specific locations in the refrigerant circuit 200, and the normal region calculation unit 332 corresponds to each of the three refrigerant state information x.
- the normal area X is calculated.
- the three refrigerant state information x is determined by the refrigerant state at three specific locations of the refrigerant circuit 200, respectively.
- the three specific places are the three places of the inlet of the compressor 101, the outlet of the compressor 101, and the outlet of the condenser. Therefore, the three refrigerant state information x includes the inlet information a indicating the refrigerant state at the inlet of the compressor 101, the outlet information b indicating the refrigerant state at the outlet of the compressor 101, and the outlet of the condenser. Condensation information c indicating the state of the refrigerant. That is, the normal area calculation means 332 calculates the inlet information a, the outlet information b, and the condensation information c as the three refrigerant state information x.
- the three normal regions X are determined according to each of the inlet information a, the outlet information b, and the condensation information c which are three refrigerant state information x. Therefore, the three normal regions X are an inlet region A where the inlet information a exists during normal operation, an outlet region B where the outlet information b exists during normal operation, and a condensation region C where the condensation information c exists during normal operation. It is comprised by. That is, the cycle state calculation means 331 calculates the inlet region A, the outlet region B, and the condensation region C as the three normal regions X corresponding to the three refrigerant state information x.
- the refrigerant state information x is within the normal region X, it can be determined that there is no abnormality in the air conditioner 100.
- the condensation information c has a higher enthalpy than the condensation region C, the condensation information c deviates to the right of the condensation region C. In this case, an abnormality in the refrigerant amount in the refrigerant circuit 200 is suspected.
- the exit information b When the exit information b is higher than the exit area B and the condensation information c is higher than the condensation area C, the exit information b deviates above the exit area B and the condensation information in the diagnostic image. c deviates from the condensation region C to the upper side. In this case, a heat transfer abnormality of the condenser is suspected.
- the cause of the heat transfer abnormality of the condenser the abnormality of the outdoor heat exchanger 102 or the operation of the outdoor fan 104 during the cooling operation, the abnormality of the indoor heat exchanger 103 during the heating operation, or the indoor fan 105 An abnormal operation is assumed.
- the entrance information a When the entrance information a is lower than the entrance area A, the entrance information a falls below the entrance area A in the diagnostic image. In this case, an abnormal heat transfer of the evaporator is suspected.
- the abnormality of the indoor heat exchanger 103 or the operation of the indoor fan 105 during the cooling operation the abnormality of the outdoor heat exchanger 102 during the heating operation or the abnormality of the outdoor fan 104 An abnormal operation is assumed.
- the exit information b When the exit information b has a higher enthalpy than the exit area B, the exit information b deviates to the right of the exit area B in the diagnostic image. In this case, an abnormality of the compressor 101 is suspected.
- the entrance information a has a lower enthalpy than the entrance area A, the entrance information a deviates to the left of the entrance area A in the diagnostic image. In this case, it is suspected that the liquid refrigerant is flowing into the compressor 101.
- the diagnostic information displays the inlet information a Deviates above the inlet area A, the outlet information b deviates below the outlet area B, and the condensation information c deviates below the condensation area C.
- an abnormality of the expansion means 106 or piping clogging is suspected.
- the abnormality of the expansion means 106 means that an abnormality has occurred in at least one of the first expansion valve 106a and the second expansion valve 106b.
- the piping that is, a situation where the refrigerant circuit 200 has a blocking portion that is a portion that hinders circulation of the refrigerant.
- the abnormality diagnosis unit 330 obtains the refrigerant state information x using the state data and the control data in the normal operation abnormality diagnosis, and arranges the obtained refrigerant state information x in the storage unit 701 of the server device 700 in time series. May be accumulated. Then, the abnormality diagnosis unit 330 may determine whether there is an abnormality in the air conditioner 100 based on a change with time of the refrigerant state information x accumulated in the server device 700. In this way, since the tendency of deterioration over time of the actuator of the air conditioner 100 and the like can be known, the air conditioner 100 can be monitored with higher accuracy. Appropriate countermeasures can be taken more quickly.
- Failure diagnosis system 800 may be configured with server device 700 and a plurality of air conditioning systems 600.
- each of the plurality of air conditioning systems 600 may accumulate state data, control data, data obtained by the normal operation abnormality diagnosis, and data obtained by the abnormality factor identification diagnosis in the server device 700 over time.
- Each of the plurality of air conditioning systems 600 may share and use information stored in the server device 700. In this way, the abnormality diagnosis unit 330 can perform failure diagnosis using not only the past data accumulated in the storage unit 701 but also the data of the other air conditioning system 600, thereby improving the diagnosis accuracy. be able to.
- the normal area X is set to a relatively large area in an initial stage where the amount of accumulated data is small in order to suppress frequent occurrence of abnormality determination.
- the normal area X can be reduced to an appropriate area at a relatively early stage. Therefore, it is possible to improve the diagnostic accuracy of the normal driving abnormality diagnosis.
- FIG. 5 illustrates the case where the diagnosis image is displayed including the saturation line S, but the present invention is not limited to this, and the diagnosis image may not include the saturation line S.
- 5 illustrates the case where the diagnostic image is displayed including the refrigeration cycle graphic Cf. However, the present invention is not limited to this, and the diagnostic image may not include the refrigeration cycle graphic Cf. However, when the diagnostic image includes the refrigeration cycle graphic Cf, it is easier to associate the refrigerant state information x with the normal region X, so that the convenience of the user can be improved.
- FIG. 5 illustrates the case where the isothermal line Tout and the isothermal line Tin are displayed on the diagnostic image.
- the present invention is not limited to this, and the isothermal line Tout and the isothermal line Tin are displayed on the diagnostic image. You don't have to.
- the isotherm Tout and the isotherm Tin are displayed on the diagnostic image, the user can visually grasp the relationship between the state of the air conditioner 100 and the air temperature around the air conditioner 100. it can.
- control device 140 and the failure diagnosis device 300 perform the above functions in cooperation with hardware such as a circuit device that realizes the above functions, or an arithmetic device such as a microcomputer, and such an arithmetic device. It can be configured by software to be realized.
- the storage unit 320 can be configured by a RAM (Random Access Memory) and ROM (Read Only Memory), a PROM (Programmable ROM) such as a flash memory, an HDD (Hard Disk Drive), or the like.
- FIG. 6 is a flowchart showing the operation of the failure diagnosis system of FIGS. 1 and 2. With reference to FIG. 6, the failure diagnosis method for air conditioner 100 according to Embodiment 1 will be described.
- the control device 140 determines whether or not the air conditioner 100 is in normal operation (step S101).
- the control device 140 determines that the air conditioner 100 is not in normal operation (step S101 / No)
- the failure diagnosis processing by the failure diagnosis system 800 ends.
- control device 140 collects current control data and state data, that is, current operation data. Then, control device 140 transmits the collected operation data to stable operation determination unit 310 (step S102).
- the stable operation determination unit 310 acquires the current operation data from the control device 140, and stores the acquired operation data in the storage unit 320 (step S103). And the stable driving
- the stable operation determination unit 310 sends a stability signal indicating that the operation state of the air conditioner 100 is stable to the abnormality diagnosis unit 330. Send. Then, the abnormality diagnosis unit 330 acquires the current operation data collected by the control device 140 in step S102 from the storage unit 320. But the stable driving
- the abnormality diagnosis unit 330 obtains state space data composed of the refrigerant state information x and the normal region X using the current operation data (step S106). Next, the abnormality diagnosis unit 330 determines whether an abnormality has occurred in the air conditioner 100 from the arrangement of the refrigerant state information x with respect to the normal region X (step S107). When the refrigerant state information x is included in the normal region X, the abnormality diagnosis unit 330 determines that no abnormality has occurred in the air conditioner 100 (Step S107 / No). In this case, the failure diagnosis system 800 proceeds to the process of step S101. At this time, the failure diagnosis system 800 may move to the process of step S101 after waiting for a preset standby time.
- the abnormality diagnosis unit 330 determines that an abnormality has occurred in the air conditioner 100.
- the state space data includes a plurality of refrigerant state information x and a plurality of normal regions X
- the abnormality diagnosis unit 330 performs air conditioning when at least one refrigerant state information x is outside the corresponding normal region X. It is determined that an abnormality has occurred in the machine 100 (step S107 / Yes).
- the series of steps from step S101 to step S107 corresponds to normal operation abnormality diagnosis.
- the abnormality diagnosis unit 330 causes the storage unit 320 or the storage unit 701 to store data obtained by the normal operation abnormality diagnosis, that is, operation data, state space data, and the like (step S108).
- the abnormality diagnosis unit 330 performs abnormality factor specifying control for changing the control value of the actuator of the air conditioner 100 from the current value.
- the abnormality factor specifying control is control for changing the control value of the actuator of the air conditioner 100, and is intended to change the state of the refrigeration cycle shown in the ph diagram. That is, the abnormality diagnosis unit 330 determines an actuator for changing the control value according to the result of the normal operation abnormality diagnosis. Then, the abnormality diagnosis unit 330 changes the determined control value of the actuator.
- the abnormality diagnosis unit 330 transmits to the control device 140 a control command for the actuator determined based on the result of the normal operation abnormality diagnosis.
- the control device 140 changes the control value of the actuator of the air conditioner 100 by a set amount in accordance with a control command from the abnormality diagnosis unit 330.
- the set amount for each actuator may be stored in the storage unit 320.
- the control device 140 may read the set amount from the storage unit 320 and control the actuator.
- the abnormality diagnosis unit 330 may read the set amount from the storage unit 320 and transmit a control command including the read set amount to the control device 140.
- a set amount table in which the control value for each actuator is associated with the set amount may be stored in the storage unit 320.
- the control device 140 obtains the set amount by checking the current control value against the set amount table. But you may memorize
- control device 140 collects control data and state data at the present time, that is, operation data after changing the control value. This is to evaluate the influence of the failure factor specifying control on the state of the refrigeration cycle. Then, the control device 140 transmits the operation data after the change of the control value to the abnormality diagnosis unit 330 (step S110).
- the abnormality diagnosis unit 330 acquires the operation data after the change of the control value from the control device 140 (step S111), the abnormality diagnosis unit 330 obtains the state space data after the change of the control value using the acquired operation data. That is, the abnormality diagnosis unit 330 calculates the state of the refrigeration cycle under the abnormality factor specifying control (step S112).
- the abnormality diagnosis unit 330 analyzes the state space data after the change of the control value. That is, the abnormality diagnosis unit 330 compares the state space data obtained in step S106 with the state space data after the change of the control value (step S113). Then, the abnormality diagnosis unit 330 identifies the cause of the abnormality of the air conditioner 100 based on the degree of change in the state space data after the change of the control value with respect to the state space data obtained in step S106.
- the management device 400 causes the abnormality factor identification result to be output from at least one of the display unit 421 and the notification unit 422.
- the output processing unit 334 transmits the factor identification information to the information terminal 500
- the information terminal 500 causes the abnormality factor identification result to be output from at least one of the display unit 521 and the notification unit 522.
- the management apparatus 400 When the output processing unit 334 transmits display data to the management apparatus 400, the management apparatus 400 causes the display unit 421 to display an analysis image based on the display data.
- the output processing unit 334 transmits display data to the information terminal 500 the information terminal 500 causes the display unit 521 to display an analysis image based on the display data.
- the failure diagnosis system 800 can support a user such as a maintenance worker by displaying an analysis image (step S114).
- Step S109 to Step S114 corresponds to abnormality factor specific diagnosis.
- the cause of the abnormality identified by the failure diagnosis system 800 includes a refrigerant amount abnormality, heat exchange deterioration, filter, that is, compressor abnormality, liquid back, overcurrent, piping, that is, LEV lock, fan lock, and the like. is there.
- the failure diagnosis system 800 executes the series of steps S101 to S114 described above for each preset diagnosis cycle.
- the abnormality diagnosis unit 330 For example, in the normal operation abnormality diagnosis, it is possible to obtain a diagnosis result that an abnormality has occurred in at least one of the outdoor heat exchanger 102 and the outdoor fan 104. However, the normal operation abnormality diagnosis cannot determine which of the outdoor heat exchanger 102 and the outdoor fan 104 is abnormal.
- the abnormality diagnosis unit 330 when obtaining a diagnosis result that an abnormality has occurred in at least one of the outdoor heat exchanger 102 and the outdoor fan 104, the abnormality diagnosis unit 330 performs the abnormality factor specifying control as Control to change the rotational speed of the outdoor fan 104 is performed. At this time, if there is no abnormality in the outdoor fan 104, when the rotational speed of the outdoor fan 104 is changed, a predetermined change occurs in the ph diagram. Therefore, the diagnosis processing means 333 determines the response of the ph diagram when the rotational speed of the outdoor fan 104 is changed, and which of the outdoor heat exchanger 102 and the outdoor fan 104 is abnormal. .
- the diagnosis processing means 333 identifies an actuator in which an abnormality has occurred based on the amount of change in the refrigerant state information x after the control value change with respect to the refrigerant state information x before the control value change. To do.
- the failure diagnosis system 800 determines that there is an abnormality in the air conditioner 100 during normal operation based on the state data and the control data
- the failure diagnosis system 800 changes the control value of the actuator.
- the factor of abnormality of the air conditioner 100 is specified using the operation data before the change of the control value and the operation data after the change of the control value. Therefore, the accuracy of determining whether there is an abnormality can be increased and the cause of the abnormality can be identified quickly and accurately, so that failure diagnosis can be performed with high accuracy and efficiency without impairing comfort.
- the failure diagnosis system 800 includes a stable operation determination unit 310 that determines whether or not the operation state of the air conditioner 100 is stable using operation data during normal operation of the air conditioner. Then, the abnormality diagnosis unit 330 performs normal operation abnormality diagnosis when the stable operation determination unit 310 determines that the operation state is stable. That is, in the normal operation abnormality diagnosis, since the stability of the operation state of the air conditioner 100 is ensured, the determination accuracy of the presence / absence of abnormality is increased, so that frequent occurrence of abnormality factor specific control is suppressed and energy saving is achieved. be able to.
- the abnormality diagnosis unit 330 obtains refrigerant state information x indicating the state of the refrigerant at a specific location of the refrigerant circuit 200 using the operation data in the normal operation abnormality diagnosis. Moreover, the abnormality diagnosis part 330 calculates
- the abnormality diagnosis unit 330 causes at least one of the management device 400 and the information terminal 500 to output a result of specifying the cause of the abnormality. Therefore, a user such as a maintenance worker can quickly know the cause of the abnormality of the air conditioner 100 without taking time and effort.
- the abnormality diagnosis unit 330 displays the refrigerant state information x before the change of the control value and the refrigerant state information x after the change of the control value on at least one of the management device 400 and the information terminal 500. Therefore, a user such as a maintenance worker can grasp the state of the air conditioner 100 at a glance.
- the abnormality diagnosis unit 330 outputs the refrigerant state information x before and after the change of the control value together with the abnormality factor identification result, the user not only identifies the abnormality factor identification result but also the degree of abnormality. Since it can be visually recognized, a finer response can be taken.
- Embodiment 2 The overall configuration and functional configuration of the failure diagnosis system according to the second embodiment of the present invention are the same as those in the first embodiment. Therefore, the same components are denoted by the same reference numerals and the description thereof is omitted. .
- the failure diagnosis apparatus 300 is configured on the assumption that a maintenance worker uses the failure diagnosis system 800 under the owner.
- the stable operation determination unit 310 of the second embodiment determines whether or not the operation state of the air conditioner 100 is stable at every preset update cycle. Then, the stable operation determination unit 310 causes the storage unit 320 to store state data and control data, that is, operation data when it is determined that the operation state of the air conditioner 100 is stable.
- state data and control data that is, operation data when it is determined that the operation state of the air conditioner 100 is stable.
- the operation data that the stable operation determination unit 310 stores in the storage unit 320 when the operation state of the air conditioner 100 is stable is also referred to as stable operation data.
- the new stable operation data is added to the stable operation data in the storage unit 320. May be overwritten.
- the abnormality diagnosis unit 330 reads the latest stable operation data from the storage unit 320 in response to an external diagnosis request, and uses the read stable operation data to determine whether there is an abnormality in the air conditioner 100. Determine. In addition, the abnormality diagnosis unit 330 determines that there is an abnormality in the air conditioner 100 in the normal operation abnormality diagnosis, and performs an abnormality factor identification diagnosis when a factor identification request is received from the outside.
- FIG. 7 is a flowchart illustrating an operation data storage process in the operation of the failure diagnosis system according to the second embodiment of the present invention.
- the operation of the stable operation determination unit 310 will be described with reference to FIG.
- the same steps as those in FIG. 6 are denoted by the same reference numerals and a part of the description is omitted.
- the control device 140 determines whether or not the air conditioner 100 is in normal operation (step S101). When it is determined by the control device 140 that the air conditioner 100 is not in normal operation (step S101 / No), the failure diagnosis system 800 does not collect operation data at this time, and stores operation data. The process ends.
- step S101 When it is determined that the air conditioner 100 is in normal operation (step S101 / Yes), the control device 140 collects current operation data and transmits it to the stable operation determination unit 310 (step S102).
- step S103 When the stable operation determination unit 310 acquires the current operation data from the control device 140 (step S103), the stable operation determination unit 310 determines whether the operation state of the air conditioner 100 is stable using the acquired operation data (step S103). S104).
- the failure diagnosis system 800 ends the operation data storage process at the current timing. .
- the stable operation determination unit 310 stores the current operation data acquired from the control device 140 in step S103 in the storage unit 320 as stable operation data. Store (step S201).
- the failure diagnosis system 800 executes the series of steps S101 to S104 and S201 described above at every update cycle. Therefore, the latest operation data during the stable operation of the air conditioner 100 is stored in the storage unit 320.
- FIG. 8 is a flowchart illustrating the flow of failure diagnosis out of the operations of the failure diagnosis system according to Embodiment 2 of the present invention. With reference to FIG. 8, a flow when the maintenance worker uses the failure diagnosis system 800 under the owner will be described.
- the abnormality diagnosis unit 330 waits until a maintenance request is input from the maintenance operator via the management device 400 or the information terminal 500 (step S301 / No).
- the abnormality diagnosis unit 330 reads the latest stable operation data stored in the storage unit 320 (step S302).
- the abnormality diagnosis unit 330 obtains state space data composed of the refrigerant state information x and the normal region X using the read stable operation data (step S303). Next, the abnormality diagnosis unit 330 executes the process of step S107 as in the case of FIG. Note that a series of steps S301 to S303 and S107 corresponds to normal operation abnormality diagnosis.
- the abnormality diagnosis unit 330 determines that an abnormality has occurred in the air conditioner 100 (step S107 / Yes)
- the abnormality diagnosis unit 330 asks the maintenance operator whether or not to perform failure factor identification diagnosis. That is, the abnormality diagnosis unit 330 transmits an output command for inquiring whether or not failure factor identification diagnosis is necessary to at least one of the management device 400 and the information terminal 500.
- the management device 400 causes the display unit 421 to display information asking whether diagnosis is necessary.
- the information terminal 500 causes the display unit 521 to display information asking whether diagnosis is necessary (step S304).
- the abnormality diagnosis unit 330 executes the process of step S108 as in the case of FIG.
- the abnormality diagnosis unit 330 waits until the maintenance worker inputs a factor specifying request via the management device 400 or the information terminal 500.
- the maintenance worker performs an operation indicating that it is not necessary to carry out the abnormality factor identification diagnosis, or when a preset waiting time has elapsed (step S305 / No)
- the failure diagnosis system 800 The fault diagnosis process is terminated.
- step S305 when the maintenance operator inputs a factor identification request via the management device 400 or the information terminal 500 and the execution of the abnormality factor identification diagnosis is requested (step S305 / Yes), the process proceeds to step S109. . That is, failure diagnosis system 800 executes the processing of steps S109 to S114 in the same manner as in FIG. Note that a series of steps S305 and S109 to S114 corresponds to abnormality factor specific diagnosis.
- the management apparatus 400 displays the result of the normal operation abnormality diagnosis together with information asking whether diagnosis is necessary. And at least one of the information terminals 500 may be output.
- the abnormality diagnosis unit 330 generates an analysis image based on the state space data obtained in step S303 together with information asking whether diagnosis is necessary, among the management device 400 and the information terminal 500. You may display on at least one of these.
- step S107 / Yes the abnormality diagnosis unit 330, together with information asking whether diagnosis is necessary, the result of the normal operation abnormality diagnosis and the analysis image based on the state space data obtained in step S303, You may make it output to at least one of the management apparatus 400 and the information terminal 500. FIG. In this way, the maintenance worker can easily determine whether or not the abnormality factor specific diagnosis is necessary, so that convenience can be improved.
- the failure diagnosis system 800 also increases the accuracy of determining the presence or absence of an abnormality and can identify the cause of the abnormality quickly and accurately, so that comfort is not impaired. Failure diagnosis can be performed with high accuracy and efficiency. Further, the failure diagnosis system 800 of the second embodiment stores the operation data when the stable operation determination unit 310 determines that the operation state of the air conditioner 100 is stable in the storage unit 320 or the storage unit 701. Accumulate over time.
- the abnormality diagnosis unit 330 reads the latest operation data from the storage unit 320 or the storage unit 701 in response to a diagnosis request from the outside. And the abnormality diagnosis part 330 determines the presence or absence of abnormality of the air conditioner 100 using the read driving
- FIG. 9 is a block diagram showing a functional configuration of the failure diagnosis system according to Embodiment 3 of the present invention. Since the configuration of the failure diagnosis system in the third embodiment is the same as that in the first and second embodiments, the same components are denoted by the same reference numerals and the description thereof is omitted.
- the failure diagnosis system 800A includes an air conditioning system 600A and a server device 700A.
- the air conditioning system 600A includes an air conditioner 100A, a management device 400, and an information terminal 500.
- failure diagnosis system 800A stable operation determination unit 310 and abnormality diagnosis unit 330 are provided in server device 700A.
- the server device 700A is a storage processing device provided outside the air conditioner 100 and provided by a cloud service, for example.
- Server device 700A is communicably connected to management device 400 and information terminal 500 via electric communication line 900.
- the server device 700 ⁇ / b> A is communicably connected to the control device 140 via the telecommunication line 900 and the communication device 150.
- the server device 700A may be a physical server such as a Web server.
- the storage unit 701A of the server device 700A plays a role as the storage unit 320 in the first and second embodiments and a role as the storage unit 701 in the first and second embodiments.
- the storage unit 701A stores various data included in signals sent from the control device 140, the refrigerant temperature sensors 121 to 125, and the air temperature sensors 131 to 132, state space data, and a diagnosis result by the abnormality diagnosis unit 330. Memorize the past fixed period.
- the abnormality diagnosis unit 330 of the third embodiment has the same function as the data processing unit 702 of the first and second embodiments.
- the path through which the stable operation determination unit 310 and the abnormality diagnosis unit 330 obtain various data is different from that in the first and second embodiments, but the configurations and operations of the stable operation determination unit 310 and the abnormality diagnosis unit 330 are not implemented. This is the same as in the first and second embodiments.
- FIG. 9 illustrates the case where the failure diagnosis system 800A is configured by the server device 700A and one air conditioning system 600A, it is not limited to this.
- Failure diagnosis system 800A may be configured by server device 700A and a plurality of air conditioning systems 600A.
- the abnormality diagnosis unit 330 may perform normal operation abnormality diagnosis and abnormality factor identification diagnosis for each of the plurality of air conditioners 100A.
- the abnormality diagnosis unit 330 accumulates the state data, control data, data obtained by the normal operation abnormality diagnosis, and data obtained by the abnormality factor identification diagnosis in the server device 700A with time. Good.
- the abnormality diagnosis part 330 is good to utilize the information accumulate
- the failure diagnosis system 800A also increases the determination accuracy of the presence / absence of an abnormality and can quickly and accurately identify the cause of the abnormality without impairing comfort. Failure diagnosis can be performed with high accuracy and efficiency.
- failure diagnosis system 800A stable operation determination unit 310 and abnormality diagnosis unit 330 are provided in server device 700A. Therefore, the abnormality diagnosis of the air conditioner 100A can be accurately performed without adding the stable operation determination unit 310 and the abnormality diagnosis unit 330 inside the air conditioner 100A. That is, even with the existing air conditioner 100A, it is possible to perform a highly accurate failure diagnosis by combining with the server device 700A. Other effects are the same as those in the first and second embodiments.
- the embodiment described above is a preferable specific example in the failure diagnosis system, and the technical scope of the present invention is not limited to these embodiments.
- the case where three specific places are set is illustrated as a specific example.
- the number of specific places is not limited to one, two, four, or more. May be.
- the state detection unit 120 is not limited to the above configuration.
- the state detection unit 120 may include a refrigerant temperature sensor that is provided on the suction side of the compressor 101 and measures the temperature of the refrigerant sucked into the compressor 101 instead of the refrigerant temperature sensor 121.
- Each sensor of the state detection unit 120 is not limited to a temperature sensor, and the state detection unit 120 may include a pressure sensor that measures the pressure of the refrigerant or an infrared camera that measures the temperature of the non-contact portion.
- the refrigerant circuit 200 is not limited to the configuration of FIG. 1, and the air conditioner 100 can be mounted with various configurations of the refrigerant circuit 200.
- the failure diagnosis apparatus 300 can analyze the state of the refrigerant circuit 200 having various configurations in the same manner as described above.
- FIG. 1 illustrates the case where the expansion means 106 includes the first expansion valve 106a and the second expansion valve 106b.
- the present invention is not limited thereto, and the expansion means 106 is, for example, an electronic expansion valve 1 There may be two expansion valves.
- failure diagnosis systems 800 and 800A may include any one of the management device 400 and the information terminal 500.
- the failure diagnosis systems 800 and 800A may not include the management device 400 and the information terminal 500.
- the failure diagnosis system 800 according to the first and second embodiments may not include the management device 400 and the information terminal 500 when the failure diagnosis device 300 includes a display unit and an input unit.
- the failure diagnosis system 800 according to the first and second embodiments may not include the server device 700.
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Abstract
Description
図1は、本発明の実施の形態1に係る故障診断システムの構成図である。図1に示すように、故障診断システム800は、空調システム600と、サーバ装置700と、により構成されている。空調システム600は、空気調和機100と、管理装置400と、情報端末500と、を有している。故障診断システム800は、空気調和機100の状態を診断するものである。
本発明の実施の形態2に係る故障診断システムの全体的な構成と機能的構成とは、実施の形態1と同様であるため、同等の構成部材については同一の符号を用いて説明は省略する。本実施の形態2では、保守業務者が、施主のもとで故障診断システム800を利用することを想定して、故障診断装置300が構成されている。
図9は、本発明の実施の形態3に係る故障診断システムの機能的構成を示すブロック図である。本実施の形態3における故障診断システムの構成は、実施の形態1及び2と同様であるため、同等の構成部材については同一の符号を用いて説明は省略する。
Claims (20)
- 冷媒が循環する冷媒回路を備えた空気調和機の状態を診断する故障診断システムであって、
前記冷媒回路における冷媒の状態を状態データとして検出する状態検出部と、
前記空気調和機のアクチュエータの制御を行う制御装置と、
前記空気調和機の通常運転中における、前記状態データ及び前記制御装置による制御内容を示す制御データを用いて、前記空気調和機の異常の有無を判定する通常運転異常診断を行う異常診断部と、
を有し、
前記異常診断部は、
前記空気調和機に異常があると判定した場合、
前記空気調和機のアクチュエータの制御値を変更して前記状態データ及び前記制御データを取得し、取得した前記制御値の変更後の前記状態データ及び前記制御データと、前記制御値の変更前の前記状態データ及び前記制御データとを用いて、前記空気調和機の異常の要因を特定する異常要因特定診断を行うものである、故障診断システム。 - 前記空気調和機の通常運転中における、前記状態データ及び前記制御データを用いて、前記空気調和機の運転状態が安定しているか否かを判定する安定運転判定部を有し、
前記異常診断部は、
前記安定運転判定部において前記空気調和機の運転状態が安定していると判定されたときの、前記状態データ及び前記制御データを用いて、前記空気調和機の異常の有無を判定するものである、請求項1に記載の故障診断システム。 - 前記異常診断部は、
前記安定運転判定部において前記空気調和機の運転状態が安定していると判定されたときに、前記状態データ及び前記制御データを取得し、取得した前記状態データ及び前記制御データを用いて、前記空気調和機の異常の有無を判定するものである、請求項2に記載の故障診断システム。 - 前記状態データ及び前記制御データを記憶する記憶部を有し、
前記安定運転判定部は、
前記空気調和機の運転状態が安定しているか否かの判定を更新周期ごとに行い、前記空気調和機の運転状態が安定していると判定したときの前記状態データ及び前記制御データを、安定運転データとして前記記憶部に記憶させ、
前記異常診断部は、
外部からの診断要求に応じて、前記記憶部から最新の前記安定運転データを読み出し、読み出した前記安定運転データを用いて、前記空気調和機の異常の有無を判定するものである、請求項2に記載の故障診断システム。 - 前記安定運転判定部及び前記異常診断部は、前記空気調和機に設けられている、請求項2~4の何れか一項に記載の故障診断システム。
- 前記空気調和機と、前記状態検出部と、前記制御装置と、前記安定運転判定部と、前記異常診断部と、を含む空調システムを複数有し、
複数の前記空調システムは、それぞれ、前記状態データ、前記制御データ、前記通常運転異常診断で得られたデータ、及び前記異常要因特定診断で得られたデータを、前記空気調和機の外部に設けられたサーバ装置に経時的に蓄積させると共に、前記サーバ装置に蓄積された情報を共有して利用する、請求項2~5の何れか一項に記載の故障診断システム。 - 前記安定運転判定部及び前記異常診断部は、前記空気調和機の外部に設けられたサーバ装置に設けられている、請求項2~4の何れか一項に記載の故障診断システム。
- 前記空気調和機と、前記状態検出部と、前記制御装置と、を含む空調システムを複数有し、
前記異常診断部は、
複数の前記空気調和機の各々についての通常運転異常診断と異常要因特定診断とを行うものである、請求項7に記載の故障診断システム。 - 前記異常診断部は、
前記空気調和機ごとの前記状態データ、前記制御データ、前記通常運転異常診断で得られたデータ、及び前記異常要因特定診断で得られたデータを前記サーバ装置に経時的に蓄積させると共に、前記サーバ装置に蓄積させた情報を、複数の前記空気調和機の各々についての前記通常運転異常診断と前記異常要因特定診断とに利用するものである、請求項8に記載の故障診断システム。 - 前記異常診断部は、
前記通常運転異常診断において、前記状態データ及び前記制御データを用いて、前記冷媒回路の特定箇所での冷媒の状態を示す冷媒状態情報を求め、求めた前記冷媒状態情報を前記空気調和機の外部に設けられたサーバ装置に時系列順に整理して蓄積させ、前記サーバ装置に蓄積させた前記冷媒状態情報の経時的な変化をもとに、前記空気調和機の異常の有無を判定する機能をもつ、請求項1~5の何れか一項に記載の故障診断システム。 - 前記異常診断部は、
前記通常運転異常診断において、前記状態データ及び前記制御データを用いて、前記冷媒回路の特定箇所での冷媒の状態を示す冷媒状態情報を求め、求めた前記冷媒状態情報を前記サーバ装置に時系列順に整理して蓄積させ、前記サーバ装置に蓄積させた前記冷媒状態情報の経時的な変化をもとに、前記空気調和機の異常の有無を判定する機能をもつ、請求項6~9の何れか一項に記載の故障診断システム。 - 前記異常診断部は、
前記通常運転異常診断において、
前記状態データ及び前記制御データを用いて、前記冷媒回路の特定箇所での冷媒の状態を示す冷媒状態情報を求め、
前記異常要因特定診断において、
前記制御値の変更後の前記状態データ及び前記制御データを用いて前記冷媒状態情報を求めると共に、求めた前記冷媒状態情報と前記通常運転異常診断で求めた前記冷媒状態情報とを比較して、前記空気調和機の異常の要因を特定するものである、請求項1~11の何れか一項に記載の故障診断システム。 - 前記異常診断部は、
前記通常運転異常診断で求めた前記冷媒状態情報と、前記制御値の変更後の前記冷媒状態情報とを、前記空気調和機を管理する管理装置に表示させるものである、請求項12に記載の故障診断システム。 - 前記異常診断部が外部機器と通信を行う際のインタフェイスとなる通信装置を有し、
前記異常診断部は、
前記通常運転異常診断で求めた前記冷媒状態情報と、前記制御値の変更後の前記冷媒状態情報とを、前記通信装置を介して接続される情報端末に表示させるものである、請求項12又は13に記載の故障診断システム。 - 前記異常診断部は、
前記空気調和機を管理する管理装置に、異常の要因の特定結果を出力させるものである、請求項1~14の何れか一項に記載の故障診断システム。 - 前記異常診断部が外部機器と通信を行う際のインタフェイスとなる通信装置を有し、
前記異常診断部は、
前記通信装置を介して接続される情報端末に、異常の要因の特定結果を出力させるものである、請求項1~15の何れか一項に記載の故障診断システム。 - 前記異常診断部は、
前記通常運転異常診断において前記空気調和機に異常があると判定したときに、前記異常要因特定診断を行うものである、請求項1~16の何れか一項に記載の故障診断システム。 - 前記異常診断部は、
前記通常運転異常診断において前記空気調和機に異常があると判定し、かつ外部から要因特定要求を受けたときに、前記異常要因特定診断を行うものである、請求項1~16の何れか一項に記載の故障診断システム。 - 前記異常診断部は、
冷媒の圧力とエンタルピとにより定まる状態空間内において、前記通常運転異常診断と前記異常要因特定診断とを行うものである、請求項1~18の何れか一項に記載の故障診断システム。 - 前記空気調和機のアクチュエータは、前記冷媒回路を構成する圧縮機及び膨張弁と、前記冷媒回路を構成する熱交換器の伝熱を促進するファンと、を含み、
前記異常診断部は、
前記異常要因特定診断において、圧縮機、膨張弁、及びファンのうちの少なくとも1つの前記制御値を変更するものである、請求項1~19の何れか一項に記載の故障診断システム。
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| US17/040,657 US12000604B2 (en) | 2018-05-14 | 2018-05-14 | Failure diagnosis system configured to diagnose a state of an air-conditioning apparatus having a refrigerant circuit |
| SG11202009596TA SG11202009596TA (en) | 2018-05-14 | 2018-05-14 | Failure diagnosis system |
| EP18918975.6A EP3795915B1 (en) | 2018-05-14 | 2018-05-14 | Malfunction diagnosis system |
| ES18918975T ES2918206T3 (es) | 2018-05-14 | 2018-05-14 | Sistema de diagnóstico de averías |
| AU2018423601A AU2018423601B2 (en) | 2018-05-14 | 2018-05-14 | Failure diagnosis system |
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- 2018-05-14 WO PCT/JP2018/018554 patent/WO2019220507A1/ja not_active Ceased
- 2018-05-14 JP JP2020519231A patent/JP6865893B2/ja not_active Expired - Fee Related
- 2018-05-14 US US17/040,657 patent/US12000604B2/en active Active
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115310204A (zh) * | 2022-08-09 | 2022-11-08 | 重庆大学 | 影响汽车nvh性能的生产异常智能溯源方法 |
| WO2024134752A1 (ja) * | 2022-12-20 | 2024-06-27 | 三菱電機株式会社 | 空気調和装置の診断システム |
Also Published As
| Publication number | Publication date |
|---|---|
| US12000604B2 (en) | 2024-06-04 |
| ES2918206T3 (es) | 2022-07-14 |
| EP3795915A4 (en) | 2021-06-09 |
| EP3795915B1 (en) | 2022-05-11 |
| SG11202009596TA (en) | 2020-10-29 |
| JP6865893B2 (ja) | 2021-04-28 |
| AU2018423601B2 (en) | 2021-10-21 |
| JPWO2019220507A1 (ja) | 2020-12-10 |
| AU2018423601A1 (en) | 2020-11-19 |
| US20210018203A1 (en) | 2021-01-21 |
| EP3795915A1 (en) | 2021-03-24 |
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