WO2017164152A1 - 空調運転制御装置、空調システム、空調運転制御方法及びプログラム - Google Patents

空調運転制御装置、空調システム、空調運転制御方法及びプログラム Download PDF

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Publication number
WO2017164152A1
WO2017164152A1 PCT/JP2017/011138 JP2017011138W WO2017164152A1 WO 2017164152 A1 WO2017164152 A1 WO 2017164152A1 JP 2017011138 W JP2017011138 W JP 2017011138W WO 2017164152 A1 WO2017164152 A1 WO 2017164152A1
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WO
WIPO (PCT)
Prior art keywords
expansion valve
air conditioning
unit
refrigerant
conditioning system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/011138
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English (en)
French (fr)
Japanese (ja)
Inventor
雅司 ▲高▼野
晃弘 桝谷
岡田　有二
梓 金森
勉 小酒井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Thermal Systems Ltd
Priority to EP17770194.3A priority Critical patent/EP3379170A4/de
Priority to CN201780004243.4A priority patent/CN108291748A/zh
Publication of WO2017164152A1 publication Critical patent/WO2017164152A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • 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
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/16—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/27—Problems to be solved characterised by the stop of the refrigeration cycle
    • 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
    • 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
    • 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
    • F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
    • 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 an air conditioning operation control device, an air conditioning system, an air conditioning operation control method, and a program.
  • the amount of refrigerant flowing into the compressor increases when heating operation is performed with some indoor units stopped.
  • the lubricating oil of the compressor may be diluted with a refrigerant. Dilution of the lubricant can affect the stability of the compressor operation.
  • the multi-room air conditioner described in Patent Document 1 reduces the amount of refrigerant flowing into the compressor by allowing the refrigerant to flow into the stopped indoor unit.
  • an electromagnetic valve is provided in the refrigerant piping at the entrance and exit of each of the two indoor heat exchangers.
  • a throttle mechanism and a check valve are provided in parallel between the cooling-side inlet-side electromagnetic valve that serves as the inlet side to the indoor heat exchanger during cooling and the indoor heat exchanger.
  • a capillary for returning the refrigerant to the compressor suction side pipe is provided between the cooling-side inlet-side electromagnetic valve, the throttle mechanism, and the check valve.
  • the multi-room air conditioner described in Patent Document 1 opens a solenoid valve at both the entrance and exit of the indoor heat exchanger during operation during heating operation.
  • the stopped indoor heat exchanger only the inlet side solenoid valve during cooling is opened.
  • Patent Literature 1 in this state, the interior of the stopped indoor heat exchanger is pulled to the compressor low pressure side by the capillary and is at a low pressure, and a sufficient amount of surplus refrigerant can be stored. Has been.
  • an electromagnetic valve is provided on the refrigerant piping on both sides of the inlet / outlet of the indoor heat exchanger, and a throttle mechanism and a reverse mechanism are provided between the inlet side electromagnetic valve during cooling and the indoor heat exchanger.
  • a configuration in which a stop valve and a capillary are provided is necessary. If a simpler configuration can be achieved, the manufacturing cost of the device can be reduced.
  • the present invention provides an air-conditioning operation control device, an air-conditioning system, an air-conditioning operation control method, and a program capable of making the air-conditioning system simpler and reducing the amount of refrigerant flowing into the compressor. .
  • the air-conditioning operation control apparatus includes a single outdoor unit, a plurality of indoor units, and a plurality of air conditioners that are provided on the refrigerant outlet side during heating of each of the plurality of indoor units.
  • the operation mode determination unit that determines whether or not the air conditioning system body including the refrigerant circuit including the expansion valve is in the heating operation, and the operation mode determination unit determines that the air conditioning system body is in the heating operation.
  • the stop determination unit that determines whether there is a stopped indoor unit among the plurality of indoor units, and the stop determination unit determines that there is the stopped indoor unit, the stop determination unit determines that there is a stop.
  • An expansion valve control unit that closes the expansion valve after the expansion valve connected to the indoor unit is opened.
  • the expansion valve control unit opens an expansion valve connected to the stopped indoor unit to a predetermined opening degree, and after a predetermined time has elapsed since the expansion valve is opened to a predetermined opening degree.
  • the expansion valve may be fully closed.
  • the expansion valve control unit may control the opening degree of the expansion valve based on the temperature of the refrigerant flowing through the refrigerant circuit after closing the expansion valve connected to the stopped indoor unit. Good.
  • the expansion valve control unit is based on a difference between a temperature of the refrigerant flowing into the compressor and a temperature of the refrigerant discharged from the compressor and flowed into an outdoor heat exchanger provided in the outdoor unit.
  • the opening degree of the expansion valve may be controlled.
  • the expansion valve control unit may control the opening degree of the expansion valve based on the temperature of the refrigerant discharged from the compressor.
  • the air conditioning system includes one outdoor unit, a plurality of indoor units, and a plurality of expansions provided one by one on the refrigerant outlet side during heating of each of the plurality of indoor units.
  • An air conditioning system main body including a refrigerant circuit including a valve and any one of the air conditioning operation control devices described above are provided.
  • the air-conditioning operation control method includes a single outdoor unit, a plurality of indoor units, and a plurality of one provided on the refrigerant outlet side during heating of each of the plurality of indoor units.
  • a step of determining whether or not an air conditioning system main body having a refrigerant circuit including an expansion valve is in a heating operation, and when determining that the air conditioning system main body is in a heating operation, among the plurality of indoor units A step of determining whether or not there is a stopped indoor unit, and when it is determined that there is a stopped indoor unit, the expansion valve connected to the stopped indoor unit is opened. And an expansion valve control unit that closes the expansion valve that has been opened.
  • the fourth aspect of the present invention there are a plurality of programs provided in the computer, one outdoor unit, a plurality of indoor units, and one each on the refrigerant outlet side during heating of each of the plurality of indoor units.
  • a step of determining whether or not an air conditioning system main body having a refrigerant circuit including an expansion valve is in a heating operation, and when determining that the air conditioning system main body is in a heating operation, among the plurality of indoor units A step of determining whether or not there is a stopped indoor unit, and when it is determined that there is a stopped indoor unit, the expansion valve connected to the stopped indoor unit is opened. It is a program for performing a process and a process of closing the expansion valve that has been opened.
  • the air conditioning system can be configured more simply and the amount of refrigerant flowing into the compressor can be reduced.
  • FIG. 1 is a schematic configuration diagram showing an apparatus configuration of an air conditioning system according to an embodiment of the present invention.
  • the air conditioning system (air conditioning system) 1 includes an air conditioning operation control device 100, a first indoor unit 210a, a second indoor unit 210b, and an outdoor unit 220.
  • the first indoor unit 210a includes a first indoor heat exchanger 211a and a first indoor heat exchanger temperature sensor 315a.
  • the second indoor unit 210b includes a second indoor heat exchanger 211b and a second indoor heat exchanger temperature sensor 315b.
  • the outdoor unit 220 includes an expansion valve side first service valve 221a, an expansion valve side second service valve 221b, a first expansion valve 222a, a second expansion valve 222b, an outdoor heat exchanger 223, and a four-way valve 224. , Accumulator 225, compressor 226, four-way valve side first service valve 227a, four-way valve side second service valve 227b, compressor suction side temperature sensor 311, outdoor heat exchanger temperature sensor 312, compressor An outlet temperature sensor 313 and a compressor outlet pressure sensor 314 are provided.
  • the first indoor unit 210a and the second indoor unit 210b are collectively referred to as the indoor unit 210.
  • the first indoor heat exchanger 211a and the second indoor heat exchanger 211b are collectively referred to as an indoor heat exchanger 211.
  • the first indoor heat exchanger temperature sensor 315a and the second indoor heat exchanger temperature sensor 315b are collectively referred to as an indoor heat exchanger temperature sensor 315.
  • the expansion valve side first service valve 221a and the expansion valve side second service valve 221b are collectively referred to as an expansion valve side service valve 221.
  • the first expansion valve 222a and the second expansion valve 222b are collectively referred to as the expansion valve 222.
  • the four-way valve side first service valve 227a and the four-way valve side second service valve 227b are collectively referred to as a four-way valve side service valve 227.
  • each part other than the air conditioning operation control device 100 is collectively referred to as an air conditioning system main body 200.
  • the first indoor unit 210a and the expansion valve side first service valve 221a are connected by a first indoor unit side first pipe W11a.
  • the second indoor unit 210b and the expansion valve side second service valve 221b are connected by a second indoor unit side first pipe W11b.
  • the expansion valve side first service valve 221a and the first expansion valve 222a are connected by a first indoor unit side second pipe W12a.
  • the expansion valve side second service valve 221b and the second expansion valve 222b are connected by a second indoor unit side second pipe W12b.
  • Each of the first expansion valve 222a and the second expansion valve 222b and the outdoor heat exchanger 223 are connected by a third pipe W13.
  • the outdoor heat exchanger 223 and the four-way valve 224 are connected by a fourth pipe W14.
  • the four-way valve 224 and the accumulator 225 are connected by a fifth pipe W15.
  • the accumulator 225 and the compressor 226 are connected by a sixth pipe W16 and a seventh pipe W17.
  • a gaseous refrigerant passes through the sixth pipe W16. Further, the refrigerant that has become liquid by the compressor 226 is stored in the accumulator 225 through the seventh pipe W17.
  • the compressor 226 and the four-way valve 224 are connected by an eighth pipe W18.
  • the four-way valve 224 and each of the four-way valve side first service valve 227a and the four-way valve side second service valve 227b are connected by a ninth pipe W19.
  • the four-way valve side first service valve 227a and the first indoor unit 210a are connected by a first indoor unit side tenth pipe W20a.
  • the four-way valve side second service valve 227b and the second indoor unit 210b are connected by a second indoor unit side tenth pipe W20b.
  • the first indoor unit side first pipe W11a and the second indoor unit side first pipe W11b are collectively referred to as a first pipe W11.
  • the first indoor unit side second pipe W12a and the second indoor unit side second pipe W12b are collectively referred to as a second pipe W12.
  • the first indoor unit side tenth pipe W20a and the second indoor unit side tenth pipe W20b are collectively referred to as a tenth pipe W20.
  • the number of indoor units 210 provided in the air conditioning system 1 is not limited to two shown in FIG. 1 and may be three or more. Also in that case, each of the indoor units 210 includes one indoor heat exchanger 211.
  • the outdoor unit 220 includes the same number of expansion valve side service valves 221, expansion valves 222, and four-way valve side service valves 227 as the indoor units 210.
  • the indoor heat exchanger 211 and the expansion valve side service valve 221 are connected one-to-one with the first pipe W11.
  • the expansion valve side service valve 221 and the expansion valve 222 are connected one-to-one by the second pipe W12.
  • Each of the expansion valves 222 and the outdoor heat exchanger 223 are connected by a third pipe W13.
  • the four-way valve 224 and each of the four-way valve side service valve 227 are connected by a ninth pipe W19.
  • the four-way valve side service valve 227 and the indoor unit 210 are connected one-to-one with the tenth pipe W20.
  • the air conditioning system 1 is a system that adjusts the temperature of indoor air.
  • the air conditioning system 1 adjusts the temperature of air in a relatively wide range by including a plurality of indoor units 210 such as adjusting the temperature of air in each room where the indoor units 210 are installed.
  • the air conditioning system 1 can switch between heating operation and cooling operation.
  • the gaseous refrigerant compressed by the compressor 226 passes through the eighth pipe W18, the four-way valve 224, the ninth pipe W19, the four-way valve side service valve 227, and the tenth pipe W20 in this order. It flows into 211.
  • the gaseous refrigerant flowing into the indoor heat exchanger 211 dissipates heat and condenses by heat exchange with indoor air.
  • the refrigerant that has become liquid by condensation is decompressed by the expansion valve 222 via the first pipe W11, the expansion valve side service valve 221, and the second pipe W12, and then the outdoor heat exchanger via the third pipe W13. Flows into H.223.
  • one expansion valve 222 is provided on each refrigerant outlet side during heating of each of the plurality of indoor heat exchangers 211. That is, one expansion valve 222 is provided on each refrigerant outlet side during heating of each of the plurality of indoor units 210.
  • the refrigerant flowing into the outdoor heat exchanger 223 absorbs heat and evaporates by heat exchange with the outside air (outdoor air).
  • the refrigerant that has become gas by evaporation flows into the compressor 226 through the fourth pipe W14, the four-way valve 224, the fifth pipe W15, the accumulator 225, and the sixth pipe W16 in this order, and is compressed.
  • the apparatus with which the air-conditioning system main body 200 is equipped is connected with piping, and the refrigerant circuit which a refrigerant
  • the seventh pipe W ⁇ b> 17 is a pipe for allowing the liquid refrigerant flowing or generated in the compressor 226 to flow into the accumulator 225.
  • the air conditioning system main body 200 operates under the control of the air conditioning operation control device 100 to adjust the temperature of indoor air.
  • the indoor unit 210 is installed in a room whose temperature is to be adjusted.
  • the indoor heat exchanger 211 performs heat exchange between the refrigerant and the indoor air. In the heating operation, a high-pressure gaseous refrigerant flows into the indoor heat exchanger 211, dissipates heat by heat exchange with indoor air, and condenses. Therefore, the indoor heat exchanger 211 liquefies the gaseous refrigerant compressed by the compressor 226 and dissipates the heat of condensation to the indoor air.
  • the outdoor unit 220 is installed in a place where heat exchange with outside air is possible, for example, outdoors.
  • the expansion valve side service valve 221 and the four-way valve side service valve 227 are both used to shut off the refrigerant when the indoor unit 210 is removed.
  • the expansion valve 222 decompresses the liquid refrigerant flowing through the expansion valve 222 itself. This decompression facilitates evaporation of the refrigerant.
  • the expansion valve 222 is configured as a regulating valve. By adjusting the opening degree of the expansion valve 222, the flow rate of the refrigerant flowing through the expansion valve 222 can be adjusted.
  • An electronic expansion string that opens and closes the valve according to a pulse signal may be used as the expansion valve 222.
  • the type of the expansion valve 222 is not limited to the electronic expansion valve, and the expansion valve 222 may be an adjustment valve that can reduce the pressure by reducing the flow rate of the refrigerant.
  • the outdoor heat exchanger 223 causes heat exchange between the refrigerant and the outside air.
  • the low-pressure liquid refrigerant decompressed by the expansion valve 222 flows into the outdoor heat exchanger 223, absorbs heat and evaporates by heat exchange with the outside air. Therefore, the outdoor heat exchanger 223 absorbs the heat of vaporization from the outside air and vaporizes the liquid refrigerant.
  • the four-way valve 224 switches between heating operation and cooling operation by switching the refrigerant flow path.
  • the four-way valve 224 causes the refrigerant from the compressor 226 to flow into the indoor heat exchanger 211 by connecting the eighth pipe W18 and the ninth pipe W19.
  • the four-way valve 224 causes the refrigerant from the outdoor heat exchanger 223 to flow into the compressor 226 by connecting the fourth pipe W14 and the fifth pipe W15.
  • the accumulator 225 separates the refrigerant flowing into the accumulator 225 itself into a liquid refrigerant and a gaseous refrigerant, and allows only the gaseous refrigerant to flow into the compressor 226. This is to prevent the liquid refrigerant from flowing into the compressor 226 and causing the compressor 226 to malfunction.
  • the compressor 226 compresses a gaseous refrigerant.
  • the compressor suction side temperature sensor 311 measures the temperature of the refrigerant on the suction side (low pressure side) of the compressor 226. For example, the compressor suction side temperature sensor 311 measures the temperature of the refrigerant that is provided in the fifth pipe W15 and flows into the compressor 226 from the four-way valve 224 via the accumulator 225.
  • the outdoor heat exchanger temperature sensor 312 measures the temperature of the refrigerant in the outdoor heat exchanger 223. For example, the outdoor heat exchanger temperature sensor 312 is provided in the third pipe W13, and measures the temperature of the refrigerant flowing into the outdoor heat exchanger 223 during the heating operation.
  • the compressor outlet temperature sensor 313 measures the refrigerant temperature on the outlet side (high pressure side) of the compressor 226.
  • the compressor outlet temperature sensor 313 is provided in the eighth pipe W18 and measures the temperature of the refrigerant discharged from the compressor 226.
  • the compressor outlet pressure sensor 314 measures the pressure of the refrigerant compressed by the compressor 226.
  • the compressor outlet pressure sensor 314 is provided in the eighth pipe W18 and measures the pressure of the refrigerant discharged from the compressor 226.
  • Each of the indoor heat exchanger temperature sensors 315 measures the temperature of the refrigerant in the indoor heat exchanger 211.
  • the indoor heat exchanger temperature sensor 315 is provided in a refrigerant pipe in the indoor heat exchanger 211 and measures the temperature of the refrigerant before being condensed in the indoor heat exchanger 211.
  • the air conditioning operation control device 100 controls the air conditioning system main body 200.
  • the air conditioning operation control device 100 is configured using, for example, a computer.
  • FIG. 2 is a schematic block diagram showing a functional configuration of the air conditioning operation control apparatus 100.
  • the air conditioning operation control device 100 includes a measurement value acquisition unit 110, a storage unit 180, and a control unit 190.
  • the control unit 190 includes an operation mode determination unit 191, a stop determination unit 192, and an expansion valve control unit 193.
  • the measured value acquisition unit 110 acquires measured values obtained by various sensors provided in the air conditioning system main body 200.
  • the measurement value acquisition unit 110 is configured using a communication circuit provided in the air conditioning operation control device 100, for example.
  • the storage unit 180 stores various data.
  • storage part 180 is comprised using the memory
  • the control unit 190 executes control of the air conditioning system main body 200 by controlling each unit of the air conditioning operation control device 100.
  • the control unit 190 is realized, for example, when a CPU (Central Processing Unit) provided in the air conditioning operation control device 100 reads out and executes a program from the storage unit 180.
  • a CPU Central Processing Unit
  • the operation mode determination unit 191 determines the operation mode of the cooling circuit of the air conditioning system main body 200 (that is, the operation mode of the air conditioning system 1).
  • the operation mode here is a distinction between heating operation and cooling operation.
  • the operation mode determination unit 191 determines whether or not the air conditioning system main body 200 is in the heating operation.
  • the stop determination unit 192 determines whether there is a stopped indoor unit 210 among the plurality of indoor units 210. .
  • the stopped indoor unit 210 here is an indoor unit 210 that has been stopped by the user. In the stopped indoor unit 210, the blower fan is stopped and the sending of warm air or cold air is stopped.
  • the stopped indoor unit 210 is also referred to as a stopped indoor unit 210.
  • the expansion valve control unit 193 controls the opening degree of the expansion valve 222.
  • the expansion valve 222 opens the expansion valve 222 connected to the stopped indoor unit 210, and then performs the expansion.
  • the valve 222 is closed.
  • the expansion valve control unit 193 opens the expansion valve 222 connected to the stopped indoor unit 210 to a predetermined opening degree.
  • the expansion valve control unit 193 may fully open the expansion valve 222.
  • the expansion valve control unit 193 fully closes the expansion valve 222 after a predetermined time has elapsed since the expansion valve 222 is opened to a predetermined opening degree.
  • the expansion valve control unit 193 may close the expansion valve 222 to a predetermined opening degree.
  • the timing at which the expansion valve control unit 193 closes the expansion valve 222 is not limited to a predetermined time after the expansion valve 222 is opened to a predetermined opening degree.
  • the expansion valve control unit 193 may close the expansion valve 222 after a predetermined time has elapsed since the start of the operation of the air conditioning system 1.
  • the expansion valve control unit 193 may close the expansion valve 222 at a timing when the refrigerant pressure in the indoor heat exchanger 211 becomes equal to or higher than a predetermined pressure.
  • a high-density refrigerant compressed by the compressor 226 is added to the indoor heat exchanger 211 of the indoor unit 210. Can be introduced. Thereafter, the expansion valve 222 closes the expansion valve 222 connected to the indoor unit 210, whereby high-density refrigerant can be stored in the indoor heat exchanger 211 of the indoor unit 210. Thereby, the quantity of the refrigerant
  • the expansion valve control unit 193 controls the opening degree of the expansion valve 222 based on the temperature of the refrigerant after being compressed by the compressor 226 after closing the expansion valve 222 connected to the stopped indoor unit 210. To do. Here, when the temperature of the refrigerant after being compressed by the compressor 226 is high, there is a possibility that the amount of the refrigerant flowing through the refrigerant circuit is insufficient and the efficiency of heat exchange is reduced. Therefore, the expansion valve control unit 193 increases the opening of the expansion valve 222 to increase the amount of refrigerant flowing through the refrigerant circuit. This is expected to improve the efficiency of heat exchange.
  • the expansion valve control unit 193 reduces the amount of refrigerant flowing through the refrigerant circuit by reducing the opening degree of the expansion valve 222. As a result, the amount of refrigerant flowing into the compressor 226 can be reduced, and it can be avoided that the lubricating oil of the compressor 226 is diluted with the refrigerant and affects the operational stability of the compressor 226.
  • FIG. 3 is a flowchart illustrating an example of a processing procedure in which the air conditioning operation control device 100 controls the air conditioning system main body 200.
  • the air-conditioning operation control apparatus 100 starts the process of FIG. 3 when the power supply of the air-conditioning system 1 is connected (ON) and the operation is started. Note that when the power of the air conditioning system 1 is turned off (OFF), the air conditioning operation control device 100 ends the process of FIG.
  • the operation mode determination unit 191 determines whether or not the air conditioning system main body 200 is in the heating operation (step S101). If it is determined that the heating operation is being performed (step S101: YES), the stop determination unit 192 determines whether there is a stopped indoor unit 210 (step S102). If it is determined that there is a stopped indoor unit 210 (step S102: YES), the expansion valve control unit 193 opens the opening of the expansion valve 222 connected to the stopped indoor unit 210 to a predetermined opening. (Step S111).
  • the expansion valve control unit 193 opens the opening degree of the expansion valve 222 connected to all the stopped indoor units 210 to a predetermined opening degree.
  • the expansion valve control unit 193 opens the opening of the expansion valve 222 connected to a part of the stopped indoor units 210 by a predetermined amount. It may be opened each time.
  • the expansion valve control unit 193 determines whether or not a predetermined time has elapsed since the expansion valve 222 was opened in step S111 (step S112). For example, the expansion valve control unit 193 includes a timer, and measures an elapsed time after completing the opening degree adjustment of the expansion valve 222 in step S111. Then, the expansion valve control unit 193 determines whether or not the measurement time by the timer has reached a predetermined time.
  • step S112 When it is determined that a predetermined time has not elapsed since the expansion valve 222 was opened (step S112: NO), the process returns to step S112. That is, it waits for the passage of a predetermined time. On the other hand, when it is determined that a predetermined time has elapsed since opening the expansion valve 222 (step S112: YES), the expansion valve control unit 193 fully closes the expansion valve 222 opened in step S111 (step S113). .
  • the expansion valve control unit 193 determines that the difference obtained by subtracting the temperature measurement value by the outdoor heat exchanger temperature sensor 312 from the temperature measurement value by the compressor suction side temperature sensor 311 is a predetermined threshold T LOW. It is determined whether it is below (step S114).
  • the difference obtained by subtracting the temperature measurement value by the outdoor heat exchanger temperature sensor 312 from the temperature measurement value by the compressor suction side temperature sensor 311 will be expressed as ⁇ TSH.
  • the threshold value T LOW is a threshold value set in advance as a lower limit value of the allowable range of ⁇ TSH.
  • step S114 When it is determined that ⁇ TSH is equal to or less than the threshold T LOW (step S114: YES), the expansion valve control unit 193 is connected to the stopped indoor unit 210 (the indoor unit 210 whose opening degree is adjusted in step S111).
  • the opening degree of the expansion valve 222 is reduced (step S121).
  • the expansion valve 222 is an electronic expansion valve, the valve is closed by a predetermined number of pulses. That is, when it is determined that ⁇ TSH is smaller than the lower limit value of the allowable range, the expansion valve control unit 193 reduces the opening of the expansion valve 222 connected to the stopped indoor unit 210 to reduce the inside of the indoor unit 210.
  • step S121 the process returns to step S114.
  • step S114 determines whether ⁇ TSH is equal to or less than a predetermined threshold value T HIGH (step S131).
  • the threshold value T HIGH is a threshold value set in advance as an upper limit value of the allowable range of ⁇ TSH, and “T HIGH > T LOW ” is satisfied.
  • step S31 When it is determined that ⁇ TSH is equal to or less than the threshold value T HIGH (step S31: YES), the expansion valve control unit 193 is connected to the stopped indoor unit 210 (the indoor unit 210 whose opening degree is adjusted in step S111).
  • the opening degree of the expansion valve 222 is maintained (step S141). That is, when it is determined that ⁇ TSH is within the allowable range, the expansion valve control unit 193 maintains the opening of the expansion valve 222 connected to the stopped indoor unit 210 to store the refrigerant in the indoor unit 210. Let the amount of maintain. Thereby, the quantity of the refrigerant
  • step S131 when it is determined in step S131 that ⁇ TSH is larger than the threshold value T HIGH (step S131: NO), the expansion valve control unit 193 determines that the indoor unit 210 is stopped (the indoor unit 210 whose opening is adjusted in step S111). ) Is increased (step S151).
  • the expansion valve 222 is an electronic expansion valve, the valve is opened by a predetermined number of pulses. That is, when it is determined that ⁇ TSH is larger than the upper limit value of the allowable range, the expansion valve control unit 193 increases the opening of the expansion valve 222 connected to the stopped indoor unit 210, thereby increasing the inside of the indoor unit 210. Reduce the amount of refrigerant stored in Thereby, the quantity of the refrigerant
  • step S101 determines whether the heating operation is not being performed.
  • step S102 determines whether the heating operation is not being performed.
  • step S161 the air conditioning system main body 200 performs a normal operation according to the control of the air conditioning operation control device 100.
  • step S161 the air conditioning system 1 does not perform processing for storing the refrigerant in the stopped indoor unit 210.
  • step S102: NO the process transitions to step S161.
  • step S161 the process returns to step S101 from the state where the air conditioning system main body 200 is operating normally.
  • the control unit 190 periodically transitions to step S101.
  • the control unit 190 may transition to step S101. . If a user operation for switching the operation mode of the air conditioning system 1 or a user operation for operating the stopped indoor unit 210 is performed in any of steps S111 to S151, the process proceeds to step S101 in an interrupt process. Transition.
  • the expansion valve control unit 193 controls the opening of the expansion valve 222 based on the measured value of the compressor suction side temperature sensor 311 and the measured value of the outdoor heat exchanger temperature sensor 312.
  • the compressor outlet temperature sensor 313, the compressor outlet pressure sensor 314, and the indoor heat exchanger temperature sensor 315 are not essential for the process of storing the refrigerant in the stopped indoor unit 210.
  • the measured value that is referred to when the expansion valve control unit 193 controls the opening degree of the expansion valve 222 connected to the stopped indoor unit 210 is the measured value of the compressor suction side temperature sensor 311 and the outdoor heat exchange. It is not restricted to the measured value of the vessel temperature sensor 312.
  • the expansion valve control unit 193 may control the opening degree of the expansion valve 222 connected to the stopped indoor unit 210 based on the measured value of the compressor outlet temperature sensor 313. Specifically, in step S114, the expansion valve control unit 193 may determine whether or not the measured value of the compressor outlet temperature sensor 313 is equal to or lower than the compressor outlet temperature lower limit threshold value.
  • the compressor outlet temperature lower limit threshold is a threshold set in advance as the outlet temperature lower limit of the compressor 226.
  • expansion valve control part 193 judges whether the measured value of compressor outlet temperature sensor 313 is below the compressor outlet temperature upper limit threshold.
  • the compressor outlet temperature upper limit threshold is a threshold predetermined as the outlet temperature upper limit of the compressor 226. In this case, regarding the process of storing the refrigerant in the stopped indoor unit 210, the compressor suction side temperature sensor 311, the outdoor heat exchanger temperature sensor 312, the compressor outlet pressure sensor 314, and the indoor heat exchanger temperature sensor 315 are: Not required.
  • the expansion valve control unit 193 determines the opening degree of the expansion valve 222 connected to the stopped indoor unit 210 based on the measured value of the compressor outlet temperature sensor 313 and the measured value of the compressor outlet pressure sensor 314. You may make it control. For example, in step S114, the expansion valve control unit 193 may determine whether the measured value of the compressor outlet temperature sensor 313 is equal to or lower than the compressor outlet temperature lower limit threshold and equal to or lower than the compressor outlet pressure lower limit threshold. Good.
  • the compressor outlet pressure lower limit threshold is a threshold predetermined as the outlet pressure lower limit of the compressor 226.
  • expansion valve control part 193 judges whether the measured value of compressor outlet temperature sensor 313 is below the compressor outlet temperature upper limit threshold and below the compressor outlet pressure upper limit threshold.
  • the compressor outlet pressure upper limit threshold value is a threshold value determined in advance as the outlet pressure upper limit value of the compressor 226.
  • the compressor suction side temperature sensor 311, the outdoor heat exchanger temperature sensor 312, and the indoor heat exchanger temperature sensor 315 are not essential for the process of storing the refrigerant in the stopped indoor unit 210.
  • the expansion valve control unit 193 determines the opening degree of the expansion valve 222 connected to the stopped indoor unit 210 based on the measured value of the outdoor heat exchanger temperature sensor 312 and the measured value of the compressor outlet temperature sensor 313. You may make it control. For example, whether or not the difference obtained by subtracting the measured value of the outdoor heat exchanger temperature sensor 312 from the measured value of the compressor outlet temperature sensor 313 from the measured value of the compressor outlet temperature sensor 313 in step S114 is equal to or smaller than a predetermined lower limit threshold value. You may make it determine.
  • step S131 the expansion valve control unit 193 determines whether or not the difference obtained by subtracting the measured value of the outdoor heat exchanger temperature sensor 312 from the measured value of the compressor outlet temperature sensor 313 is equal to or less than a predetermined upper limit threshold value. Determine whether.
  • the compressor suction side temperature sensor 311, the compressor outlet pressure sensor 314, and the indoor heat exchanger temperature sensor 315 are not essential for the process of storing the refrigerant in the stopped indoor unit 210.
  • the expansion valve control unit 193 changes the opening of the expansion valve 222 connected to the stopped indoor unit 210 to the measured value of the outdoor heat exchanger temperature sensor 312 and the measured value of the indoor heat exchanger temperature sensor 315. You may make it control based on. For example, in step S114, the expansion valve control unit 193 determines whether the difference obtained by subtracting the measured value of the outdoor heat exchanger temperature sensor 312 from the measured value of the indoor heat exchanger temperature sensor 315 is equal to or less than a predetermined lower limit threshold value. It may be determined whether or not. Specifically, the expansion valve control unit 193 calculates the average value of the measured values of the indoor heat exchanger temperature sensor 315 provided in the operating indoor unit 210, and the outdoor heat exchanger from the obtained average value.
  • the measured value of the temperature sensor 312 is subtracted. And the expansion valve control part 193 determines whether the difference obtained by subtraction is below a predetermined
  • the compressor suction side temperature sensor 311, the compressor outlet temperature sensor 313, and the compressor outlet pressure sensor 314 are not essential for the process of storing the refrigerant in the stopped indoor unit 210.
  • the operation mode determination unit 191 determines whether or not the air conditioning system main body 200 is in the heating operation.
  • the stop determination unit 192 determines whether there is a stopped indoor unit 210.
  • the expansion valve control unit 193 opens the expansion valve 222 connected to the stopped indoor unit 210, and then performs the expansion. The valve 222 is closed. Accordingly, the stopped indoor unit 210 can store the refrigerant, and the amount of the refrigerant flowing into the compressor 226 can be reduced.
  • the expansion valve control unit 193 controls the expansion valve 222, so that the stopped indoor unit 210 can store the refrigerant. It is only necessary to provide the expansion valve 222 on the outlet side during the heating operation of the indoor heat exchanger 211, and it is not necessary to provide the expansion valve on the inlet side, so that the configuration of the air conditioning system 1 can be made relatively simple. . In addition, it is not necessary to provide a capillary for returning the refrigerant to the compressor suction side pipe on the outlet side during the heating operation of the indoor heat exchanger 211, and since the stopped indoor unit 210 stores the refrigerant, There is no need to provide a separate receiver tank for storing the water. Also in this respect, the configuration of the air conditioning system 1 can be relatively simplified.
  • the expansion valve control unit 193 can change the amount of refrigerant flowing through the refrigerant circuit by changing the opening degree of the expansion valve 222. If the expansion valve control unit 193 changes the opening degree of the expansion valve 222, it is considered that the amount of refrigerant flowing through the refrigerant circuit is changed immediately, and the responsiveness is high.
  • the expansion valve control unit 193 opens the expansion valve 222 connected to the stopped indoor unit 210 to a predetermined opening degree, and opens the expansion valve 222 to a predetermined opening degree.
  • the expansion valve 222 is fully closed after a predetermined time has elapsed. Accordingly, the expansion valve control unit 193 can store the refrigerant in the stopped indoor unit 210 by a simple process of opening the expansion valve 222 to a predetermined opening degree and then fully closing the expansion valve 222.
  • the expansion valve control unit 193 closes the expansion valve 222 connected to the stopped indoor unit 210, and then opens the expansion valve 222 based on the temperature of the refrigerant flowing through the refrigerant circuit of the air conditioning system main body 200. To control. Accordingly, the expansion valve control unit 193 can detect that the amount of refrigerant flowing through the refrigerant circuit is decreased and the efficiency of heat exchange is reduced, and can increase the amount of refrigerant flowing through the refrigerant circuit. Further, the expansion valve control unit 193 detects that the amount of refrigerant flowing through the refrigerant circuit has increased and the amount of refrigerant flowing into the compressor 226 has increased, and reduces the amount of refrigerant flowing through the refrigerant circuit. Can do.
  • the expansion valve control unit 193 determines the expansion valve 222 based on the difference between the temperature of the refrigerant flowing into the compressor 226 and the temperature of the refrigerant discharged from the compressor 226 compressor and flowing into the outdoor heat exchanger 223. To control the opening degree. Thereby, the expansion valve control part 193 can control the opening degree of the expansion valve 222 based on the result of the simple calculation of calculating the difference of the temperature measurement value by the sensor. For example, the expansion valve control unit 193 compares the difference obtained by subtracting the temperature measurement value by the outdoor heat exchanger temperature sensor 312 from the temperature measurement value by the compressor suction side temperature sensor 311 with the threshold value, and compares the result. Based on this, the opening degree of the expansion valve 222 can be controlled.
  • the expansion valve control unit 193 may control the opening degree of the expansion valve 222 based on the temperature of the refrigerant discharged from the compressor 226. Thereby, the expansion valve control part 193 can control the opening degree of the expansion valve 222 based on the result of the simple calculation using the temperature measurement value by the sensor. For example, the expansion valve control unit 193 can control the opening degree of the expansion valve 222 based on the result of a simple calculation of comparing the temperature measurement value by the compressor outlet temperature sensor 313 with a threshold value.
  • a program for realizing all or part of the functions of the control unit 190 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may perform the process of.
  • the “computer system” here includes an OS and hardware such as peripheral devices.
  • the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • the air conditioning system can be configured more simply and the amount of refrigerant flowing into the compressor can be reduced.
  • Air conditioning system 100 Air-conditioning operation control apparatus 110 Measurement value acquisition part 180 Storage part 190 Control part 191 Operation mode determination part 192 Stop determination part 193 Expansion valve control part

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
PCT/JP2017/011138 2016-03-25 2017-03-21 空調運転制御装置、空調システム、空調運転制御方法及びプログラム Ceased WO2017164152A1 (ja)

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EP17770194.3A EP3379170A4 (de) 2016-03-25 2017-03-21 Steuerungsvorrichtung für klimaanlagenbetrieb, klimaanlage, klimaanlagensteuerungsverfahren und programm
CN201780004243.4A CN108291748A (zh) 2016-03-25 2017-03-21 空调运行控制装置、空调系统、空调运行控制方法及程序

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EP3483524A1 (de) * 2017-11-09 2019-05-15 Mitsubishi Heavy Industries Thermal Systems, Ltd. Steuerungsvorrichtung einer mehrfachklimatisierungsvorrichtung, mehrfachklimatisierungsvorrichtung, verfahren zur steuerung einer mehrfachklimatisierungsvorrichtung und computerprogramm zur steuerung einer mehrfachklimatisierungsvorrichtung

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JP7457244B2 (ja) * 2020-04-27 2024-03-28 ダイキン工業株式会社 空調管理システム及び冷媒回収管理装置
CN114353249B (zh) * 2021-12-09 2023-07-18 青岛海尔空调电子有限公司 用于多联机空调的控制方法及装置、多联机空调
US20250334308A1 (en) * 2022-06-01 2025-10-30 Panasonic Intellectual Property Management Co., Ltd. Refrigeration cycle device

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CN108291748A (zh) 2018-07-17

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