WO2017212606A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
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- WO2017212606A1 WO2017212606A1 PCT/JP2016/067230 JP2016067230W WO2017212606A1 WO 2017212606 A1 WO2017212606 A1 WO 2017212606A1 JP 2016067230 W JP2016067230 W JP 2016067230W WO 2017212606 A1 WO2017212606 A1 WO 2017212606A1
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- Prior art keywords
- heat exchanger
- refrigeration cycle
- cycle apparatus
- heat source
- source side
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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
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/004—Outdoor unit with water as a heat sink or heat source
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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
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable 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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
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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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
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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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/112—Fan speed control of evaporator fans
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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
- F25B2600/00—Control issues
- F25B2600/13—Pump speed control
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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
- F25B2600/00—Control issues
- F25B2600/21—Refrigerant outlet evaporator 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/15—Power, e.g. by voltage or current
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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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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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
- F25B2700/2103—Temperatures near a 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
- F25B2700/2104—Temperatures of an indoor room or compartment
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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
- F25B2700/2106—Temperatures of fresh outdoor air
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to a refrigeration cycle apparatus applied to a building multi air conditioner, a vehicle air conditioner, and the like.
- Patent Document 1 it is determined whether or not a difference value between a set value and a measured value for an element device exceeds an allowable range, and the number of times that the difference value is determined to exceed the allowable range is set as the set number of times. It is described that it is determined that there is a possibility that the element device has an abnormality and fails when the value exceeds.
- Patent Document 1 it is possible to detect an abnormality of the element device in the refrigeration cycle apparatus, but it is difficult to specify the cause of the abnormality. For example, if the measured value is significantly different from the set value, specify whether an abnormality has occurred in the element device itself, or whether an abnormality has occurred in the sensor for obtaining the measured value. I can't.
- the present invention has been made in view of the problems in the above-described conventional technology, and an object of the present invention is to provide a refrigeration cycle apparatus that can identify an abnormal location.
- the refrigeration cycle apparatus of the present invention is a refrigeration cycle apparatus in which a compressor, a heat source side heat exchanger, a decompression device, a use side heat exchanger are connected by piping, and a refrigeration cycle is formed by circulating refrigerant, A control device that controls the operation of each device, wherein the control device sets a first operation state of one element device among a plurality of element devices controlled by the control device included in the plurality of devices; Based on the state of each device when the state is changed from the state to the second state, a special operation mode for specifying an abnormal point is performed.
- the refrigeration cycle apparatus of the present invention by checking the state of each device when the state of one element device among a plurality of element devices is changed, it is possible to identify an abnormal location. it can.
- FIG. 1 is a block diagram illustrating an example of a configuration of a refrigeration cycle apparatus according to Embodiment 1.
- FIG. It is a block diagram which shows an example of a structure of the control apparatus of FIG.
- It is a block diagram which shows an example of a structure of the monitoring system 110 which can apply the refrigerating-cycle apparatus 100 which concerns on Embodiment 1.
- FIG. It is a block diagram which shows an example of a structure of the monitoring apparatus of FIG.
- FIG. 4 is a block diagram illustrating an example of a configuration of a storage device in FIG. 3. It is the schematic which shows an example of the state of various parameters at the time of changing the compressor frequency of the compressor of FIG.
- FIG. 6 is a block diagram illustrating an example of a configuration of a refrigeration cycle apparatus according to Embodiment 2.
- FIG. 6 is a block diagram illustrating an example of a configuration of a refrigeration cycle apparatus according to Embodiment 3.
- FIG. 6 is a block diagram illustrating an example of a configuration of a refrigeration cycle apparatus according to Embodiment 3.
- Embodiment 1 FIG.
- the refrigeration cycle apparatus according to Embodiment 1 of the present invention will be described.
- FIG. 1 is a block diagram showing an example of the configuration of the refrigeration cycle apparatus 100 according to the first embodiment.
- the refrigeration cycle apparatus 100 includes a compressor 1, a refrigerant flow switching device 2, a heat source side heat exchanger 3, a decompression device 4, a use side heat exchanger 5, and an accumulator 6.
- the refrigeration cycle apparatus 100 forms a refrigeration cycle in which the refrigerant circulates by sequentially connecting these devices via refrigerant piping.
- Such a refrigeration cycle apparatus 100 is used, for example, in an air conditioner, a refrigerator, a heat pump water heater, or the like.
- the refrigeration cycle apparatus 100 is provided with a control device 20 that controls the operation of each device.
- the heat source side heat exchanger 3 is provided with a heat source side blower 7 for supplying a fluid such as air to the heat source side heat exchanger 3.
- the use side heat exchanger 5 is provided with a use side blower 8 for supplying a fluid such as air to the heat source side heat exchanger 3.
- heat source side filter 9 for removing foreign matters and the like contained in the fluid supplied to the heat source side heat exchanger 3 by the heat source side blower 7. Is provided.
- use side filter 10 for removing foreign matters contained in the fluid supplied to the use side heat exchanger 5 by the use side blower 8. ing.
- the compressor 1 sucks a low-temperature and low-pressure refrigerant, compresses the refrigerant, and discharges it in a high-temperature and high-pressure state.
- the compressor 1 for example, an inverter compressor whose capacity can be controlled by controlling the compressor frequency can be used.
- the refrigerant flow switching device 2 is a four-way valve, for example, and switches between a cooling operation and a heating operation by switching the direction in which the refrigerant flows.
- the heat source side heat exchanger 3 performs heat exchange between a fluid such as air supplied by the heat source side blower 7 and the refrigerant. Thereby, heating air or cooling air supplied to the indoor space is generated.
- the heat source side heat exchanger 3 functions as an evaporator that evaporates the refrigerant during cooling operation and cools the air or the like with the heat of vaporization at that time.
- it functions as a condenser which heats air etc. with the heat
- the heat source side blower 7 supplies the sucked fluid such as air to the heat source side heat exchanger 3 through the heat source side filter 9.
- the heat source side blower 7 is driven by a fan motor 7 a and can change the flow rate of the fluid supplied to the heat source side heat exchanger 3.
- a case where the fluid supplied by the heat source side blower 7 is outdoor air will be described as an example.
- the decompression device 4 decompresses and expands the refrigerant by adjusting the flow rate of the refrigerant.
- a valve capable of controlling the opening degree such as an electronic expansion valve can be used.
- the decompression device 4 is not limited to this, and other decompression devices such as capillaries can also be used.
- the use side heat exchanger 5 exchanges heat between a fluid such as air supplied by the use side blower 8 and the refrigerant. Thereby, the use side heat exchanger 5 functions as a condenser during the cooling operation. Moreover, the use side heat exchanger 5 functions as an evaporator during the heating operation.
- the use side blower 8 supplies the sucked fluid such as air to the use side heat exchanger 5 through the use side filter 10.
- the use side blower 8 is driven by the fan motor 8 a and can change the flow rate of the fluid supplied to the use side heat exchanger 5.
- the fluid supplied by the utilization side air blower 8 is room air.
- the accumulator 6 is provided on the suction side of the compressor 1.
- the accumulator 6 stores surplus refrigerant generated due to a difference in the operating state between the cooling operation and the heating operation, surplus refrigerant with respect to a transient change in operation, and the like.
- the control device 20 includes, for example, software executed on an arithmetic device such as a microcomputer or a CPU (Central Processing Unit), hardware such as a circuit device that realizes various functions, and the like. To control. For example, the control device 20 determines the compressor frequency of the compressor 1, the valve opening when the decompression device 4 is an expansion valve, the heat source based on the operation contents instructed by the user, signals from various sensors described later, and the like. The number of revolutions of the side blower 7 and the use side blower 8 is controlled.
- an arithmetic device such as a microcomputer or a CPU (Central Processing Unit)
- the control device 20 determines the compressor frequency of the compressor 1, the valve opening when the decompression device 4 is an expansion valve, the heat source based on the operation contents instructed by the user, signals from various sensors described later, and the like.
- the number of revolutions of the side blower 7 and the use side blower 8 is controlled.
- control device 20 performs the presence / absence of occurrence of an abnormality, isolation of the abnormality at that time, identification of an abnormality occurrence point, and the like based on signals from various sensors. The details of the processing relating to such an abnormality will be described later.
- the refrigeration cycle apparatus 100 is provided with pressure sensors 31 and 32, temperature sensors 33 to 38, and current sensors 39 and 40.
- the pressure sensor 31 is provided on the discharge side of the compressor 1 and detects a discharge pressure that is the pressure of the refrigerant discharged from the compressor 1.
- the pressure sensor 32 is provided on the suction side of the compressor 1 and detects a suction pressure that is a pressure of the refrigerant sucked into the compressor 1.
- the pressure sensors 31 and 32 output a detection signal indicating the detection result to the control device 20.
- the temperature sensors 33 to 36 are provided to detect the temperature of the refrigerant in the refrigeration cycle directly or indirectly through the refrigerant pipe or the like, and output a detection signal indicating the detection result to the control device 20.
- the temperature sensor 33 is provided on the discharge side of the compressor 1 and detects the temperature of the refrigerant discharged from the compressor 1.
- the temperature sensor 34 is provided on the liquid side of the heat source side heat exchanger 3, detects the temperature of the liquid refrigerant flowing out from the heat source side heat exchanger 3 during the cooling operation, and flows into the heat source side heat exchanger 3 during the heating operation. The temperature of the gas-liquid two-phase refrigerant is detected.
- the temperature sensor 35 is provided on the liquid side of the use-side heat exchanger 5 and detects the temperature of the gas-liquid two-phase refrigerant flowing into the use-side heat exchanger 5 during the cooling operation, and the use-side heat exchanger 5 during the heating operation. The temperature of the liquid refrigerant flowing out from the tank is detected.
- the temperature sensor 36 is provided on the gas side of the use side heat exchanger 5, detects the temperature of the gas refrigerant flowing out of the use side heat exchanger 5 during the cooling operation, and flows into the use side heat exchanger 5 during the heating operation. The temperature of the gas refrigerant is detected.
- the temperature sensors 37 and 38 are provided to detect an ambient temperature such as an outside air temperature, and output a detection signal indicating a detection result to the control device 20.
- the temperature sensor 37 is provided at the air inlet of the heat source side heat exchanger 3 and detects the outside air temperature.
- the temperature sensor 38 is provided at the air suction port of the use side heat exchanger 5 and detects the temperature of the room air.
- the current sensor 39 detects an input current to the fan motor 7a that drives the heat source side blower 7.
- the current sensor 40 detects an input current to the fan motor 8 a that drives the use-side fan 8.
- Current sensors 39 and 40 output a detection signal indicating a detection result to control device 20.
- FIG. 2 is a block diagram showing an example of the configuration of the control device 20 of FIG.
- the control device 20 includes a sensor information analysis unit 21, an abnormality determination unit 22, a storage unit 23, an operation control unit 24, and an operation mode setting unit 25.
- the control apparatus 20 in this example only the part relevant to this Embodiment 1 is shown in figure, and description is abbreviate
- an operation input unit 30 and a display unit 28 are connected to the control device 20.
- the operation input unit 30 is used when the user selects an operation mode, for example. Details of the operation mode will be described later.
- the operation input unit 30 outputs an operation signal corresponding to the user's operation and supplies a signal indicating the selected operation mode to the operation mode setting unit 25 described later.
- a remote controller or the like can be used as the operation input unit 30, for example.
- the display unit 28 includes, for example, an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, and the like, and indicates the presence / absence of an abnormality, an abnormality such as a specified abnormality part, etc. based on the control of the operation control unit 24 described later. Display information.
- LCD Liquid Crystal Display
- organic EL Electro Luminescence
- the sensor information analysis unit 21 receives detection signals from various sensors, and derives parameters necessary for specifying an abnormal part when an abnormality occurs in the refrigeration cycle apparatus 100 based on the input detection signals.
- the parameter in this case is, for example, the degree of superheat in the use-side heat exchanger 5 or the like.
- the sensor information analysis unit 21 supplies the derived parameter to the abnormality determination unit 22 and the operation control unit 24.
- the abnormality determination unit 22 determines the presence or absence of abnormality based on the parameters received from the sensor information analysis unit 21 and data stored in the storage unit 23 described later. In addition, when the abnormality determination unit 22 determines that an abnormality has occurred, the abnormality determination unit 22 identifies the abnormal location when the abnormality has occurred. Then, the abnormality determination unit 22 supplies the operation control unit 24 with information indicating the presence / absence of an abnormality and information indicating the abnormal location when the abnormality occurs.
- the storage unit 23 stores various data such as data necessary for each unit of the control device 20 to perform various processes and data generated by the various processes.
- the storage unit 23 stores parameter values and the like during normal operation that serve as a reference when the abnormality determination unit 22 specifies an abnormal location when an abnormality occurs.
- the storage unit 23 stores setting information required when operating the refrigeration cycle apparatus 100 in a special operation mode described later. Details of the special operation mode will be described later.
- the operation mode setting unit 25 sets the selected operation mode in order to operate the refrigeration cycle apparatus 100 in the operation mode selected by the user via the operation input unit 30 among the plurality of operation modes. .
- the operation mode setting unit 25 supplies information indicating the selected operation mode to the operation control unit 24.
- the operation control unit 24 controls the operation of each unit in the control device 20 based on the input information. Further, the operation control unit 24 controls the entire refrigeration cycle apparatus 100. For example, when the operation control unit 24 receives information indicating a special operation mode for detecting an abnormality from the operation mode setting unit 25, the operation control unit 24 reads the setting information from the storage unit 23, and based on the read setting information, the refrigeration cycle apparatus The operation of each of the 100 devices is controlled. Further, for example, when the operation control unit 24 receives information indicating an abnormal location at the time of occurrence of an abnormality from the abnormality determination unit 22, the operation control unit 24 controls the operation of each device of the refrigeration cycle apparatus 100 based on this information.
- the refrigeration cycle apparatus 100 can select and execute various operation modes by remote operation, and when the special operation mode is executed, an abnormality of the refrigeration cycle apparatus 100 can be detected. The presence / absence and the location of an abnormality when an abnormality is detected can be identified.
- FIG. 3 is a block diagram showing an example of the configuration of the monitoring system 110 to which the refrigeration cycle apparatus 100 according to the first embodiment can be applied.
- the monitoring system 110 includes a refrigeration cycle apparatus 100, a local controller 101, a monitoring apparatus 102, and a storage apparatus 103, and the local controller 101 and the monitoring apparatus 102 are connected via a network 105 such as the Internet.
- the monitoring device 102 and the storage device 103 are provided in a remote place from the point where the refrigeration cycle apparatus 100 and the local controller 101 are provided.
- the refrigeration cycle apparatus 100 is obtained by removing the operation input unit 30, the display unit 28, the abnormality determination unit 22 and the storage unit 23 in the control device 20 from the above-described configuration. Further, the control device 20 of the refrigeration cycle apparatus 100 is provided with a communication unit (not shown), and is connected to the local controller 101 via this communication unit.
- the local controller 101 is connected to the refrigeration cycle apparatus 100 and manages the refrigeration cycle apparatus 100.
- a monitoring device 102 is connected to the local controller 101 via a network 105.
- the local controller 101 exchanges various data with the refrigeration cycle apparatus 100, and also exchanges various data with the monitoring apparatus 102 via the network 105.
- FIG. 4 is a block diagram showing an example of the configuration of the monitoring apparatus 102 in FIG.
- the monitoring device 102 includes a calculation unit 121, a control unit 122, a communication unit 123, and a display unit 124, and an operation input unit 120 is connected to the monitoring device 102.
- the operation input unit 120 is used, for example, when the user selects the operation mode, and corresponds to the operation input unit 30 described above.
- the calculation unit 121 corresponds to the abnormality determination unit 22 of the control device 20 in the refrigeration cycle apparatus 100 described above, and is based on information received from the sensor information analysis unit 21 of the control device 20 via a communication unit 123 described later. Judgment of presence / absence, identification of abnormal location when abnormality occurs.
- the control unit 122 controls the operation of each unit in the monitoring device 102 based on the input information.
- the control unit 122 also controls operations performed by the monitoring device 102 such as commands to the local controller 101 connected via the network 105, operation mode settings, and identification of abnormal locations.
- the communication unit 123 exchanges various data with the local controller 101 connected via the network 105. In addition, the communication unit 123 exchanges various data with the communication unit 131 of the storage device 103 described later.
- the display unit 124 is composed of, for example, an LCD, an organic EL display, and the like, and displays information indicating the presence / absence of an abnormality, a specified abnormal part, and the like based on the control of the control unit 122.
- the display unit 124 corresponds to the display unit 28 described above.
- FIG. 5 is a block diagram showing an example of the configuration of the storage device 103 in FIG.
- the storage device 103 includes a communication unit 131 and a storage unit 132.
- the communication unit 131 exchanges various data with the communication unit 123 of the monitoring device 102.
- the storage unit 132 stores data received from the monitoring device 102 via the communication unit 131.
- the storage unit 132 corresponds to the storage unit 23 described above.
- the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 via the refrigerant flow switching device 2.
- the high-temperature and high-pressure gas refrigerant that has flowed into the heat source side heat exchanger 3 condenses while exchanging heat with the outdoor air and dissipates heat, and becomes a supercooled high-pressure liquid refrigerant that flows out of the heat source side heat exchanger 3.
- the high-pressure liquid refrigerant that has flowed out of the heat source side heat exchanger 3 is decompressed by the decompression device 4 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant and flows into the use-side heat exchanger 5.
- the low-temperature and low-pressure gas-liquid two-phase refrigerant that has flowed into the use-side heat exchanger 5 exchanges heat with the indoor air, absorbs heat and evaporates, thereby cooling the indoor air and becomes a low-temperature and low-pressure gas refrigerant. Out of the vessel 5.
- the low-temperature and low-pressure gas refrigerant that has flowed out of the use-side heat exchanger 5 passes through the refrigerant flow switching device 2 and the accumulator 6 and is sucked into the compressor 1.
- Heating operation mode Next, the operation of the refrigerant in the heating operation mode will be described.
- the refrigerant flow switching device 2 is switched to the state indicated by the dotted line in FIG.
- the low-temperature and low-pressure refrigerant is compressed by the compressor 1 and discharged as a high-temperature and high-pressure gas refrigerant.
- the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the use side heat exchanger 5 through the refrigerant flow switching device 2.
- the high-temperature and high-pressure gas refrigerant that has flowed into the use-side heat exchanger 5 condenses while exchanging heat with room air, dissipates heat, and becomes a supercooled high-pressure liquid refrigerant that flows out of the use-side heat exchanger 5.
- the high-pressure liquid refrigerant that has flowed out of the use-side heat exchanger 5 is decompressed by the decompression device 4 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant and flows into the heat source-side heat exchanger 3.
- the low-temperature and low-pressure gas-liquid two-phase refrigerant flowing into the heat source side heat exchanger 3 exchanges heat with the outdoor air, absorbs heat and evaporates, and becomes a low temperature and low pressure gas refrigerant and flows out of the heat source side heat exchanger 3.
- the low-temperature and low-pressure gas refrigerant flowing out from the heat source side heat exchanger 3 passes through the refrigerant flow switching device 2 and the accumulator 6 and is sucked into the compressor 1.
- a special operation mode for detecting an abnormality in an apparatus or the like.
- a cooling operation or a heating operation is performed, and a set temperature for indoor air is fixed.
- the location where abnormality has occurred is specified based on each sensor output value obtained when the operation state of the device controlled by the control device 20 is changed from the first state to the second state. Can do.
- a device controlled by such a control device 20 is appropriately referred to as an “element device”.
- the cause of the abnormality is due to an abnormality of various sensors or an abnormality of various devices forming the refrigeration cycle. Can be separated.
- Such separation of abnormalities can be estimated based on the output value states of various sensors when the operation state of the element device is changed from the first state to the second state. Specifically, for example, when the operating state of an element device is changed, if the output values of various sensors do not change, it is estimated that an abnormality has occurred in the sensor such as sensor deterioration or sensor detachment. Can do.
- the special operation mode by changing the operation state of one of the component devices and fixing the operation state of the remaining devices, an abnormality can be detected and an abnormality occurs. Can be identified.
- the component devices in the refrigeration cycle apparatus 100 at this time include the compressor 1, the decompression device 4 as an expansion valve, the heat source side blower 7, and the use side blower 8.
- the compressor frequency is changed.
- an abnormality of the decompression device 4 as an expansion valve can be detected.
- the valve opening is changed.
- an abnormality of the compressor 1 can be detected.
- the rotation speed of the blower is changed.
- the rotation speed of the heat source side blower 7 for example, an abnormality in the heat source side blower 7, the heat source side heat exchanger 3, etc.
- the rotation speed of the use side blower 8 for example, an abnormality in the use side blower 8, the use side heat exchanger 5 and the like can be detected.
- the decompression device 4 is an expansion valve that expands the refrigerant by adjusting the opening of the valve. Further, it is assumed that the valve opening degree of the decompression device 4 is controlled by the control device 20 so that the degree of superheat in the use side heat exchanger 5 becomes a preset temperature, for example, 4 ° C. during the cooling operation.
- FIG. 6 is a schematic diagram showing an example of various parameter states when the compressor frequency of the compressor 1 of FIG. 1 is changed. 6 (a) to 6 (c) show various parameter states when the refrigeration cycle apparatus 100 operates normally.
- FIG. 6A shows the state of the compressor frequency of the compressor 1 set in the special operation mode.
- the compressor frequency of the compressor 1 is changed from 30 Hz to 70 Hz at a preset time interval, for example, 10 minutes.
- FIG.6 (b) shows the state of the superheat degree in the utilization side heat exchanger 5 at the time of changing the compressor frequency of the compressor 1 as shown to Fig.6 (a).
- FIG. 6C shows the state of the indicated value of the valve opening degree with respect to the decompression device 4 by the control device 20 when the compressor frequency of the compressor 1 is changed as shown in FIG.
- FIG. 6 (d) to 6 (f) show various parameter states when the refrigeration cycle apparatus 100 does not operate normally due to an abnormality occurring in the decompression apparatus 4.
- FIG. 6 (d) to 6 (f) show various parameter states when the refrigeration cycle apparatus 100 does not operate normally due to an abnormality occurring in the decompression apparatus 4.
- FIG. 6 (d) shows the state of the compressor frequency of the compressor 1 set in the special operation mode, as in FIG. 6 (a).
- FIG.6 (e) shows the state of the superheat degree in the utilization side heat exchanger 5 at the time of changing the compressor frequency of the compressor 1 as shown in FIG.6 (d).
- FIG. 6 (f) shows the state of the indicated value of the valve opening degree with respect to the decompression device 4 by the control device 20 when the compressor frequency of the compressor 1 is changed as shown in FIG. 6 (d).
- the control device 20 When the refrigeration cycle apparatus 100 operates normally and the compressor frequency of the compressor 1 is changed as shown in FIG. 6A, the control device 20 always has a superheat degree of 4 on the use side heat exchanger 5.
- the valve opening degree of the decompression device 4 is controlled so as to be at ° C.
- the control device 20 controls the decompression device 4 so as to increase the valve opening degree of the decompression device 4 at the timing when the compressor frequency increases.
- a superheat degree is always kept at 4 degreeC.
- the degree of superheat in the use-side heat exchanger 5 can be calculated by subtracting the saturation temperature at the pressure detected by the pressure sensor 32 from the temperature detected by the temperature sensor 36.
- the control device 20 causes the superheat degree to always be 4 ° C.
- the valve opening degree of the decompression device 4 is controlled.
- the degree of superheat increases to 10 ° C. due to the valve of the decompression device 4 not operating normally. Therefore, the control device 20 performs control so that the valve opening is further increased. As a result, the indicated value of the valve opening by the control device 20 is finally maximized.
- the decompressor 4 It can be determined that an abnormality has occurred.
- the superheat degree of the heat source side heat exchanger 3 and the indicated value of the valve opening of the decompression device 4 are confirmed while the superheat degree of the heat source side heat exchanger 3 is controlled to be constant. By doing so, the abnormality of the decompression device 4 can be similarly detected.
- the abnormality of the decompression device 4 is determined based on the degree of superheat of the use side heat exchanger 5 and the instruction value of the valve opening degree to the decompression device 4, but this is not limited to this example.
- the abnormality of the pressure reducing device 4 can be determined based only on the instruction value of the valve opening degree with respect to the pressure reducing device 4. This is because, when an abnormality occurs in the decompression device 4, for example, when the indicated value of the valve opening for the decompression device 4 increases, the superheat degree of the use side heat exchanger 5 also increases accordingly. This is because the value changes in accordance with the change in the indicated value of the valve opening.
- the refrigeration cycle apparatus 100 is in a cooling operation. That is, in the following description, it is assumed that the use side heat exchanger 5 functions as an evaporator. In this example, it is assumed that the valve opening degree of the decompression device 4 is controlled by the control device 20 so that the degree of superheat in the use-side heat exchanger 5 becomes 4 ° C. during the cooling operation.
- FIG. 7 is a schematic diagram illustrating an example of various parameter states when the refrigeration cycle apparatus 100 of FIG. 1 is operating normally and the rotation speed of the use-side blower 8 is changed.
- FIG. 7A shows the state of the fan speed of the use-side blower 8 set in the special operation mode.
- FIG.7 (b) shows the state of the superheat degree in the utilization side heat exchanger 5 at the time of changing the fan rotation speed of the utilization side blower 8 as shown to Fig.7 (a).
- FIG.7 (c) shows the state of the electric current value input into the fan motor 8a of the utilization side air blower 8 at the time of changing the fan rotation speed of the utilization side air blower 8 as shown to Fig.7 (a).
- FIG.7 (d) shows the state of the instruction
- control device 20 performs control so as to change the fan rotation speed of the use side blower 8 as shown in FIG.
- the valve opening degree of the decompression device 4 is controlled so that the degree of superheat always becomes a preset temperature.
- the control device 20 controls the pressure reducing device 4 so as to increase the valve opening of the pressure reducing device 4 at the time X when the fan rotation speed increases, as shown in FIG. Thereby, as shown in FIG.7 (b), the superheat degree in the utilization side heat exchanger 5 is always maintained at preset temperature.
- the current value input to the fan motor 8a changes according to the number of fan rotations as shown in FIG. 7C. Specifically, when the fan speed increases, the current value of the fan motor 8a increases, and when the fan speed decreases, the current value decreases.
- FIG. 8 is a schematic diagram showing a first example of various parameter states when the refrigeration cycle apparatus 100 of FIG. 1 does not operate normally and the rotation speed of the use side blower 8 is changed.
- Fig.8 (a) shows the state of the fan rotation speed of the utilization side air blower 8 set in the special operation mode.
- the fan rotational speed of the use side blower 8 is increased at the time point X, and the fan rotational speed is returned to the original rotational speed at the time point Y.
- FIG. 8B shows the state of the degree of superheat in the use side heat exchanger 5 when the fan rotation speed of the use side blower 8 is changed as shown in FIG. 8A.
- FIG. 8C shows the state of the current value input to the fan motor 8a of the use side blower 8 when the fan rotation speed of the use side blower 8 is changed as shown in FIG. 8A.
- FIG.8 (d) shows the state of the instruction
- a state indicated by a dotted line indicates a state where the refrigeration cycle apparatus 100 operates normally.
- the control apparatus 20 performs control so as to change the fan rotation speed of the use-side blower 8 as shown in FIG.
- the current value input to the fan motor 8a in order to obtain the fan rotation speed is set as shown in FIG. 8C. It becomes larger than normal operation.
- control device 20 controls the valve opening degree of the decompression device 4 so that the degree of superheat in the use side heat exchanger 5 always becomes a preset temperature. At this time, the degree of superheat in the use side heat exchanger 5 is always maintained at a set temperature as shown in FIG. 8B, but the assumed air volume to the use side heat exchanger 5 is reduced due to deterioration of the fan motor 8a. It cannot be obtained sufficiently, and the degree of superheat tends to decrease. Therefore, as shown in FIG. 8D, the control device 20 controls the pressure reducing device 4 so that the valve opening degree of the pressure reducing device 4 is smaller than that during normal operation.
- the special operation mode is executed, the fan rotation speed of the use side blower 8 is changed, and the state of the input current value of the fan motor 8a and the indication value of the valve opening are normal.
- a difference is recognized compared with the time of operation, it can be determined that an abnormality has occurred in the fan motor 8a.
- FIG. 9 is a schematic diagram illustrating a second example of various parameter states when the refrigeration cycle apparatus 100 of FIG. 1 does not operate normally and the rotation speed of the use-side fan 8 is changed.
- FIG. 9A shows the state of the fan rotation speed of the use side blower 8 set in the special operation mode.
- the fan rotational speed of the use-side blower 8 is increased at the time point X, and the fan rotational speed is returned to the original rotational speed at the time point Y.
- FIG. 9B shows the state of superheat in the use side heat exchanger 5 when the fan rotation speed of the use side blower 8 is changed as shown in FIG. 9A.
- FIG. 9C shows the current value input to the fan motor 8a for driving the use side blower 8 when the fan rotation speed of the use side blower 8 is changed as shown in FIG. 9A. Indicates the state.
- FIG.9 (d) shows the state of the instruction
- 9C and 9D a state indicated by a dotted line indicates a state where the refrigeration cycle apparatus 100 operates normally.
- the control apparatus 20 performs control so as to change the fan rotation speed of the use side blower 8 as shown in FIG.
- the use side filter 10 between the use side heat exchanger 5 and the use side blower 8 is clogged, the wind passes through the use side filter 10 when the fan speed is high. It becomes difficult, and it becomes impossible to supply a sufficient air volume to the use side heat exchanger 5. Therefore, the wind that cannot pass through the use-side filter 10 becomes resistance to the use-side blower 8, and the current value input to the fan motor 8a in order to obtain the fan rotation speed is as shown in FIG. 9C. It becomes larger than normal operation.
- control device 20 controls the valve opening degree of the decompression device 4 so that the degree of superheat in the use side heat exchanger 5 always becomes a preset temperature. At this time, the degree of superheat in the use side heat exchanger 5 is always maintained at a set temperature as shown in FIG. 9B, but is assumed for the use side heat exchanger 5 due to clogging of the use side filter 10. The air volume cannot be obtained sufficiently and the degree of superheat tends to decrease. Therefore, as shown in FIG. 9D, the control device 20 controls the pressure reducing device 4 so that the valve opening degree of the pressure reducing device 4 is smaller than that during normal operation.
- the fan motor 8a in the use side blower 8 is used. There is a difference between the state of the input current value and the instruction value of the valve opening degree with respect to the decompression device 4 by the control device 20 as compared with the case of the refrigeration cycle device 100 operating normally.
- the special operation mode is executed, the fan rotation speed of the use side blower 8 is changed, and the state of the input current value of the fan motor 8a and the indication value of the valve opening are normal.
- a difference is recognized as compared with that during operation, it can be determined that an abnormality has occurred in the use-side filter 10.
- the first embodiment it is possible to determine which of the fan motor 8a and the use-side filter 10 is the cause of the abnormality based on the magnitude of the difference between each parameter and the normal state.
- FIG. 10 is a schematic diagram illustrating a third example of various parameter states when the refrigeration cycle apparatus 100 of FIG. 1 does not operate normally and the rotation speed of the use-side blower 8 is changed.
- Fig.10 (a) shows the state of the fan rotation speed of the utilization side air blower 8 set in the special operation mode.
- the fan rotational speed of the use-side blower 8 is increased at the time point X, and the fan rotational speed is increased at the time point Y. It shall return to the original rotation speed.
- FIG. 10B shows the state of the superheat degree in the use side heat exchanger 5 when the fan rotation speed of the use side blower 8 is changed as shown in FIG.
- FIG. 10C shows the current value input to the fan motor 8a for driving the use-side fan 8 when the fan rotation speed of the use-side fan 8 is changed as shown in FIG. Indicates the state.
- FIG.10 (d) shows the state of the instruction
- the state indicated by the dotted line indicates a state where the refrigeration cycle apparatus 100 operates normally.
- control apparatus 20 performs control so as to change the fan rotation speed of the use-side blower 8 as shown in FIG.
- the current value input to the fan motor 8a at this time is the same value as that during normal operation, as shown in FIG.
- control device 20 controls the valve opening degree of the decompression device 4 so that the degree of superheat in the use side heat exchanger 5 always becomes a preset temperature.
- the degree of superheat in the use side heat exchanger 5 is 0 ° C. or substantially 0 ° C. as shown in FIG. It becomes. Therefore, as shown in FIG. 10D, the control device 20 controls the pressure reducing device 4 so that the valve opening degree of the pressure reducing device 4 is smaller than that during normal operation. In this case, since the degree of superheat is 0 ° C. or substantially 0 ° C., the control device 20 minimizes the valve opening degree of the decompression device 4.
- the special operation mode is executed, the fan rotation speed of the use-side fan 8 is changed, and the superheat state and the indicated value of the valve opening are compared with those during normal operation. If a difference is recognized, it can be determined that an abnormality has occurred in the use-side heat exchanger 5.
- the case where the special operation mode is executed in the heating operation state and the fan rotation speed of the heat source side blower 7 is changed is the same as described above. That is, by checking the superheat degree of the heat source side heat exchanger 3, the input current value of the fan motor 7a, and the indication value of the valve opening when the fan rotation speed of the heat source side blower 7 is changed, the heat source side blower is confirmed. 7 of the fan motor 7a, the heat source side filter 9, and the heat source side heat exchanger 3 can be detected.
- the compressor 1, the heat source side heat exchanger 3, the decompression device 4, and the use side heat exchanger 5 are connected by piping, and the refrigerant circulates.
- the control device 20 is one element device among a plurality of element devices controlled by the control device 20 included in the plurality of devices. Based on the state of each device when the operating state is changed from the first state to the second state, a special operation mode for identifying an abnormal location is performed.
- Embodiment 2 the refrigeration cycle apparatus according to the second embodiment will be described.
- the refrigeration cycle apparatus 100 in which the heat source side heat exchanger 3 is air-cooled has been described.
- a refrigeration cycle apparatus in which the heat source side heat exchanger 3 is water-cooled will be described.
- the water-cooled refrigeration cycle apparatus include a water-cooled chiller unit.
- FIG. 11 is a block diagram showing an example of the configuration of the refrigeration cycle apparatus 200 according to the second embodiment.
- the refrigeration cycle apparatus 200 includes a compressor 1, a refrigerant flow switching device 2, a heat source side heat exchanger 203, a decompression device 4, a use side heat exchanger 5, an accumulator 6, and a water cooling pump 50.
- the refrigeration cycle apparatus 200 forms a refrigeration cycle in the same manner as the refrigeration cycle apparatus 100 according to the first embodiment, and the heat source side heat exchanger 203 and the water cooling pump 50 are connected by piping, so that water or brine (hereinafter, referred to as the refrigeration cycle apparatus 200).
- a water-cooling circuit in which “cooling water” is appropriately circulated is formed.
- the same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
- the heat source side heat exchanger 203 performs heat exchange between the refrigerant flowing through the refrigeration cycle and the cooling water circulating in the water cooling circuit by the water cooling pump 50. Thereby, heating air or cooling air supplied to the indoor space is generated.
- the water cooling pump 50 sucks cooling water from a cooling tower (not shown) and press-fits the sucked cooling water into the heat source side heat exchanger 203.
- the water cooling pump 50 is configured so that the flow rate of the cooling water can be adjusted by an electric current, for example.
- the water-cooled pump 50 is composed of, for example, a DC pump whose capacity can be controlled by the amount of current flowing through a motor (not shown).
- the refrigeration cycle apparatus 200 is provided with temperature sensors 51 and 52 and a current sensor 53 in addition to the various sensors provided in the refrigeration cycle apparatus 100 described above.
- the temperature sensors 51 and 52 are provided to detect the temperature of the cooling water flowing through the water cooling circuit directly or indirectly through a refrigerant pipe or the like, and output a detection signal indicating the detection result to the control device 20. .
- the temperature sensor 51 is provided on the inlet side of the water cooling circuit in the heat source side heat exchanger 203 and detects the temperature of the cooling water flowing into the heat source side heat exchanger 203.
- the temperature sensor 52 is provided on the outlet side of the water cooling circuit in the heat source side heat exchanger 203 and detects the temperature of the cooling water flowing out from the heat source side heat exchanger 203.
- the current sensor 53 detects the amount of current flowing through a motor (not shown) that drives the water cooling pump 50.
- the current sensor 53 can be configured using, for example, a Hall element.
- the current sensor 53 outputs a detection signal indicating the detection result to the control device 20.
- the compressor 1, the decompression device 4, and the water-cooled pump 50 are listed as element devices that change the operation state by the control device 20 in the special operation mode for detecting an abnormality.
- An abnormality can be detected by changing the operating state of one of these devices in the same manner as in the first embodiment and fixing the operating state of the remaining devices.
- the flow rate of the cooling water flowing out from the water cooling pump 50 is changed.
- the abnormality of the water cooling pump 50, the heat source side heat exchanger 203, etc. is detected in the same manner as in the case of changing the rotational speed of the heat source side blower 7 in the first embodiment. can do.
- the abnormality of the water cooling pump 50 can be detected by checking the current value and the indicated value of the valve opening for the motor of the water cooling pump 50 when the flow rate of the cooling water from the water cooling pump 50 is changed. .
- the refrigeration cycle apparatus 200 further forms a water cooling circuit in which the cooling water circulates in the refrigeration cycle apparatus 100 according to the first embodiment, and circulates the cooling water.
- the water-cooling pump 50 is provided, the heat source side heat exchanger 203 performs heat exchange between the cooling water and the refrigerant, and the decompression device 4 is an expansion valve that expands the refrigerant by adjusting the opening of the valve,
- the control device 20 changes the flow rate of the cooling water flowing out from the water cooling pump 50 in a state where the superheat degree of the heat source side heat exchanger 203 is controlled to be constant, the current value for the motor of the water cooling pump 50 And the abnormality of the water cooling pump 50 can be detected based on the indicated value of the valve opening degree to the decompression device 4.
- Embodiment 3 FIG. Next, the refrigeration cycle apparatus according to Embodiment 3 will be described.
- the above-described refrigeration cycle apparatus 100 according to the first embodiment is applied as air conditioning for a vehicle such as a train will be described.
- FIG. 12 is a block diagram showing an example of the configuration of the refrigeration cycle apparatus 300 according to the third embodiment.
- the refrigeration cycle apparatus 300 includes two systems of refrigeration cycle apparatuses 100A and 100B.
- refrigeration cycle apparatus 100A and 100B what has the structure similar to refrigeration cycle apparatus 100 which concerns on Embodiment 1 mentioned above is applicable.
- the refrigeration cycle apparatus 100A includes a compressor 1A, a refrigerant flow switching device 2A, a heat source side heat exchanger 3A, a decompression device 4A, a use side heat exchanger 5A, and an accumulator 6A, and these devices form a refrigeration cycle. Has been.
- the refrigeration cycle apparatus 100A is provided with a control device 20A.
- the heat source side heat exchanger 3A is provided with a heat source side blower 7A driven by a fan motor 7aA.
- the use side heat exchanger 5A is provided with a use side blower 8A driven by a fan motor 8aA.
- a heat source side filter 9A is provided between the heat source side heat exchanger 3A and the heat source side blower 7A.
- a use side filter 10A is provided between the use side heat exchanger 5A and the use side blower 8A.
- the refrigeration cycle apparatus 100B includes a compressor 1B, a refrigerant flow switching device 2B, a heat source side heat exchanger 3B, a decompression device 4B, a use side heat exchanger 5B, and an accumulator 6B, and these devices form a refrigeration cycle. Has been.
- the refrigeration cycle apparatus 100B is provided with a control device 20B.
- the heat source side heat exchanger 3B is provided with a heat source side blower 7B driven by a fan motor 7aB.
- the use side heat exchanger 5B is provided with a use side blower 8B driven by a fan motor 8aB.
- a heat source side filter 9B is provided between the heat source side heat exchanger 3B and the heat source side blower 7B.
- a use side filter 10B is provided between the use side heat exchanger 5B and the use side blower 8B.
- each of two systems of refrigeration cycle apparatuses 100A and 100B performs the same operation as that of refrigeration cycle apparatus 100 according to Embodiment 1, and thus detailed description thereof is omitted.
- the refrigeration cycle apparatus 300 is mounted on a vehicle.
- the operation of the refrigeration cycle apparatus 300 is frequently stopped.
- the number of passengers varies greatly depending on the business hours and business sections, so the temperature of the outdoor air is not stable.
- the load does not change and the operation of the refrigeration cycle apparatus 300 does not stop, such as when the vehicle is in a garage or before starting commercial operation. It is preferable to execute the special operation mode.
- the state in which the load does not change can be detected based on, for example, the temperature detected by the temperature sensors 38A and 38B that detect the ambient temperature in the room, that is, the temperature in the vehicle. Specifically, for example, when the temperature fluctuations detected by the temperature sensors 38A and 38B within a certain time are within a preset range, the control devices 20A and 20B are equipped with the refrigeration cycle device 300. It is determined that the load on the vehicle does not change, and the special operation mode is executed.
- the refrigeration cycle apparatus 300 executes the special operation mode when detecting a state in which the load on the vehicle does not change. Therefore, even when the refrigeration cycle apparatus 300 is mounted on a vehicle or the like having a large load fluctuation, an abnormality can be detected appropriately.
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Abstract
Description
以下、本発明の実施の形態1に係る冷凍サイクル装置について説明する。
図1は、本実施の形態1に係る冷凍サイクル装置100の構成の一例を示すブロック図である。図1に示すように、冷凍サイクル装置100は、圧縮機1、冷媒流路切替装置2、熱源側熱交換器3、減圧装置4、利用側熱交換器5およびアキュムレータ6で構成されている。冷凍サイクル装置100は、これらの各機器が順に冷媒配管を介して接続されることにより、冷媒が循環する冷凍サイクルを形成する。このような冷凍サイクル装置100は、例えば、空気調和装置、冷凍機、ヒートポンプ給湯機等に用いられる。
図2は、図1の制御装置20の構成の一例を示すブロック図である。図2に示すように、制御装置20は、センサ情報解析部21、異常判断部22、記憶部23、動作制御部24、および運転モード設定部25で構成されている。なお、この例における制御装置20については、本実施の形態1に関連する部分のみを図示し、それ以外の部分については、説明を省略する。
ところで、本実施の形態1に係る冷凍サイクル装置100は、遠隔操作によって各種の運転モードを選択して実行することができるとともに、特殊運転モードを実行した場合には、冷凍サイクル装置100の異常の有無、および異常検出時の異常箇所の特定を行うことができる。
次に、上記構成を有する冷凍サイクル装置100における冷房運転モードおよび暖房運転モードでの冷媒の動作について説明する。なお、図1に示す例において、冷媒流路切替装置2の実線で示す状態が冷房運転モードでの状態を示し、点線で示す状態が暖房運転モードでの状態を示す。
まず、冷房運転モードでの冷媒の動作について説明する。冷房運転モードでは、冷媒流路切替装置2が図1の実線で示す状態に切り替えられる。そして、低温低圧の冷媒が圧縮機1によって圧縮され、高温高圧のガス冷媒となって吐出される。
次に、暖房運転モードでの冷媒の動作について説明する。暖房運転モードでは、冷媒流路切替装置2が図1の点線で示す状態に切り替えられる。そして、低温低圧の冷媒が圧縮機1によって圧縮され、高温高圧のガス冷媒となって吐出される。
また、本実施の形態1に係る冷凍サイクル装置100では、機器等の異常を検出するための特殊運転モードが設けられている。特殊運転モードでは、例えば、冷房運転または暖房運転を行い、室内空気に対する設定温度を固定した状態とする。そして、制御装置20によって制御される機器の運転状態を、第1の状態から第2の状態に変化させた際に得られる各センサ出力値に基づき、異常が発生している箇所を特定することができる。なお、以下の説明では、このような制御装置20によって制御される機器を「要素機器」と適宜称する。
本実施の形態1では、冷凍サイクル装置100に異常が発生した場合に、その異常の要因が各種センサの異常によるものであるのか、または、冷凍サイクルを形成する各種機器の異常によるものであるのかを分離することができる。
本実施の形態1では、特殊運転モードにおいて、要素機器のうち1つの機器の運転状態を変化させ、残りの機器の運転状態を固定させることにより、異常を検出することができるとともに、異常が発生した機器を特定することができる。このときの冷凍サイクル装置100における要素機器としては、例えば、圧縮機1、膨張弁としての減圧装置4、熱源側送風機7および利用側送風機8が挙げられる。
次に、特殊運転モードによって異常発生時における異常箇所を特定する方法の具体例について説明する。圧縮機1の圧縮機周波数を変化させた場合には、例えば減圧装置4の弁が正常に動作しないといった異常を検出することができる。
次に、利用側送風機8の回転数を変化させた場合に異常を検出する方法について説明する。利用側送風機8の回転数を変化させた場合には、例えば、利用側送風機8を駆動するファンモータ8a、利用側熱交換器5と利用側送風機8との間の利用側フィルタ10、利用側熱交換器5等の異常を検出することができる。
まず、冷凍サイクル装置100が正常に動作する場合について説明する。図7は、図1の冷凍サイクル装置100が正常に動作している場合で、利用側送風機8の回転数を変化させたときの各種パラメータの状態の一例を示す概略図である。
次に、利用側送風機8のファンモータ8aに異常が発生することにより、冷凍サイクル装置100が正常に動作しない場合について説明する。この例では、ファンモータ8aに異常、特に、ファンモータ8aが劣化し、想定する風量が得られない場合について説明する。
次に、フィルタに異常が発生することにより、冷凍サイクル装置100が正常に動作しない場合について説明する。この例では、利用側熱交換器5と利用側送風機8との間の利用側フィルタ10に異常、特に利用側フィルタ10が目詰まりし、利用側送風機8による最大風量時に、想定する風量が得られない場合について説明する。
次に、利用側熱交換器5に異常が発生することにより、冷凍サイクル装置100が正常に動作しない場合について説明する。この例では、利用側熱交換器5に異常、特に熱交換器が腐食し、冷媒と室内空気との間で熱交換を行うことができない場合について説明する。
すなわち、熱源側送風機7のファン回転数を変化させた際の、熱源側熱交換器3の過熱度、ファンモータ7aの入力電流値および弁開度の指示値を確認することにより、熱源側送風機7のファンモータ7a、熱源側フィルタ9、および熱源側熱交換器3の異常を検出することができる。
次に、本実施の形態2に係る冷凍サイクル装置について説明する。
上述の実施の形態1では、熱源側熱交換器3を空冷式とした冷凍サイクル装置100について説明した。本実施の形態2では、熱源側熱交換器3を水冷式とした冷凍サイクル装置について説明する。水冷式の冷凍サイクル装置としては、例えば、水冷式のチラーユニット等がある。
図11は、本実施の形態2に係る冷凍サイクル装置200の構成の一例を示すブロック図である。図11に示すように、冷凍サイクル装置200は、圧縮機1、冷媒流路切替装置2、熱源側熱交換器203、減圧装置4、利用側熱交換器5、アキュムレータ6および水冷ポンプ50で構成されている。冷凍サイクル装置200は、実施の形態1に係る冷凍サイクル装置100と同様に冷凍サイクルを形成するとともに、熱源側熱交換器203および水冷ポンプ50が配管接続されることにより、水またはブライン(以下、「冷却水」と適宜称する)が循環する水冷回路を形成する。なお、以下の説明において、上述した実施の形態1と同様の部分については、同一の符号を付し、説明を省略する。
次に、上記構成を有する冷凍サイクル装置200の動作について説明する。なお、冷房運転モードおよび暖房運転モード時の動作については、熱源側熱交換器203での熱交換の際に、冷媒と冷却水との間で熱交換を行う点で、上述した実施の形態1に係る冷凍サイクル装置100と相違し、その他の動作は冷凍サイクル装置100と同様である。
次に、本実施の形態3に係る冷凍サイクル装置について説明する。本実施の形態3では、上述した実施の形態1に係る冷凍サイクル装置100を電車等の車両用の空調として適用した場合について説明する。
図12は、本実施の形態3に係る冷凍サイクル装置300の構成の一例を示すブロック図である。図12に示すように、冷凍サイクル装置300は、2系統の冷凍サイクル装置100Aおよび100Bで構成されている。冷凍サイクル装置100Aおよび100Bとしては、上述した実施の形態1に係る冷凍サイクル装置100と同様の構成を有するものを適用することができる。
冷凍サイクル装置300では、2系統の冷凍サイクル装置100Aおよび100Bのそれぞれが、実施の形態1に係る冷凍サイクル装置100と同様の動作を行うため、詳細な説明を省略する。
Claims (11)
- 圧縮機、熱源側熱交換器、減圧装置、利用側熱交換器が配管で接続され、冷媒が循環することによって冷凍サイクルが形成される冷凍サイクル装置であって、
それぞれの機器の動作を制御する制御装置
を備え、
前記制御装置は、
複数の前記機器に含まれる前記制御装置によって制御される複数の要素機器のうち、1つの要素機器の運転状態を第1の状態から第2の状態に変化させた場合のそれぞれの前記機器の状態に基づき、異常箇所を特定する特殊運転モードを行うものである
冷凍サイクル装置。 - 前記減圧装置は、
弁の開度を調整することによって冷媒を膨張させる膨張弁であり、
前記制御装置は、
前記利用側熱交換器および前記熱源側熱交換器のいずれかの熱交換器の過熱度が一定となるように制御した状態で、前記圧縮機の圧縮機周波数を変化させた場合に、前記減圧装置に対する弁開度の指示値に基づき、前記減圧装置の異常を検出する
請求項1に記載の冷凍サイクル装置。 - ファンモータによって駆動し、前記利用側熱交換器に対して空気を供給する利用側送風機と、
前記利用側熱交換器および前記利用側送風機の間に設けられた利用側フィルタと
をさらに備え、
前記減圧装置は、
弁の開度を調整することによって冷媒を膨張させる膨張弁であり、
前記制御装置は、
前記利用側熱交換器の過熱度が一定となるように制御した状態で、前記利用側送風機のファン回転数を変化させた場合に、前記利用側送風機の前記ファンモータに対する入力電流値と、前記減圧装置に対する弁開度の指示値とに基づき、前記ファンモータまたは前記利用側フィルタの異常を検出する
請求項1または2に記載の冷凍サイクル装置。 - 前記制御装置は、
前記利用側熱交換器の過熱度と、前記減圧装置に対する弁開度の指示値とに基づき、前記利用側熱交換器の異常を検出する
請求項3に記載の冷凍サイクル装置。 - ファンモータによって駆動し、前記熱源側熱交換器に対して空気を供給する熱源側送風機と、
前記熱源側熱交換器および前記熱源側送風機の間に設けられた熱源側フィルタと
をさらに備え、
前記減圧装置は、
弁の開度を調整することによって冷媒を膨張させる膨張弁であり、
前記制御装置は、
前記熱源側熱交換器の過熱度が一定となるように制御した状態で、前記熱源側送風機のファン回転数を変化させた場合に、前記熱源側送風機の前記ファンモータに対する入力電流値と、前記減圧装置に対する弁開度の指示値とに基づき、前記ファンモータまたは前記熱源側フィルタの異常を検出する
請求項1または2に記載の冷凍サイクル装置。 - 前記制御装置は、
前記熱源側熱交換器の過熱度と、前記減圧装置に対する弁開度の指示値とに基づき、前記熱源側熱交換器の異常を検出する
請求項5に記載の冷凍サイクル装置。 - 冷却水が循環する水冷回路が形成され、
前記冷却水を循環させる水冷ポンプ
をさらに備え、
前記熱源側熱交換器は、
前記冷却水と前記冷媒との間で熱交換を行い、
前記減圧装置は、
弁の開度を調整することによって冷媒を膨張させる膨張弁であり、
前記制御装置は、
前記熱源側熱交換器の過熱度が一定となるように制御した状態で、前記水冷ポンプから流出する前記冷却水の流量を変化させた場合に、前記水冷ポンプのモータに対する電流値と、前記減圧装置に対する弁開度の指示値とに基づき、前記水冷ポンプの異常を検出する
請求項1または2に記載の冷凍サイクル装置。 - 車両に搭載され、
前記制御装置は、
前記車両に対する負荷が安定した場合に、前記特殊運転モードを行う
請求項1~7のいずれか一項に記載の冷凍サイクル装置。 - 操作に応じた操作信号を出力する操作入力部をさらに備え、
前記制御装置は、
前記操作信号に基づき、前記特殊運転モードを行う
請求項1~8のいずれか一項に記載の冷凍サイクル装置。 - 前記操作入力部は、遠隔地に設けられ、
前記制御装置は、
遠隔操作によって前記操作入力部から出力される前記操作信号を受信する通信部を有し、
前記通信部を介して受信した前記操作信号に基づき、前記特殊運転モードを行う
請求項9に記載の冷凍サイクル装置。 - 検出された前記異常を示す情報を表示する表示部をさらに備える
請求項1~10のいずれか一項に記載の冷凍サイクル装置。
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017212606A1 (ja) | 2019-01-17 |
| CN109219726A (zh) | 2019-01-15 |
| JP6785852B2 (ja) | 2020-11-18 |
| EP3470755A4 (en) | 2019-06-26 |
| US20190293331A1 (en) | 2019-09-26 |
| US10816248B2 (en) | 2020-10-27 |
| CN109219726B (zh) | 2021-04-02 |
| EP3470755A1 (en) | 2019-04-17 |
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