WO2015087421A1 - Climatiseur - Google Patents

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Publication number
WO2015087421A1
WO2015087421A1 PCT/JP2013/083304 JP2013083304W WO2015087421A1 WO 2015087421 A1 WO2015087421 A1 WO 2015087421A1 JP 2013083304 W JP2013083304 W JP 2013083304W WO 2015087421 A1 WO2015087421 A1 WO 2015087421A1
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WO
WIPO (PCT)
Prior art keywords
heat
heat medium
refrigerant
heat exchanger
source side
Prior art date
Application number
PCT/JP2013/083304
Other languages
English (en)
Japanese (ja)
Inventor
嶋本　大祐
祐治 本村
浩二 西岡
森本　修
小野　達生
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2013/083304 priority Critical patent/WO2015087421A1/fr
Publication of WO2015087421A1 publication Critical patent/WO2015087421A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using 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
    • 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
    • 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
    • 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
    • F25B2313/003—Indoor unit with water as a heat sink or heat source
    • 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
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • 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
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/0272—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using bridge circuits of one-way 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
    • 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
    • F25B2313/02743—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using three four-way 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues
    • F25B2313/0291—Control issues related to the pressure of the indoor unit
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • 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
    • F25B2500/19—Calculation of parameters
    • 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
    • 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
    • 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 an air conditioner applied to, for example, a building multi-air conditioner.
  • a conventional air conditioner has been proposed that has a plurality of indoor units, and each of the plurality of indoor units is configured to be able to select a heating operation or a cooling operation (for example, see Patent Document 1). .
  • the air conditioner described in Patent Document 1 is a cooling only mode in which all of the operating indoor units perform cooling operation, a heating mode in which all of the operating indoor units perform heating operation, and a heating load.
  • a cooling / heating simultaneous heating main mode as a larger cooling / heating simultaneous operation and a cooling / heating simultaneous cooling main mode as a cooling / heating simultaneous operation having a larger cooling load are provided.
  • JP 2006-78026 A (see, for example, FIGS. 1 and 2)
  • the air conditioner described in Patent Document 1 reduces the refrigerant flow rate by reducing the number of revolutions of the pump when the cooling load or the heating load is small.
  • the pump is composed of two units for cooling main and heating main. Because there is a limit to the lower limit value of the refrigerant flow rate that can be adjusted, the capacity flow rate of the indoor unit will not be sufficient due to the excessive refrigerant flow rate flowing to the indoor unit side, and it will be difficult to suppress damage to piping due to erosion. There was a problem of disappearing. In addition, there is a problem that pump input suppression is not sufficient when the cooling load or the heating load is small.
  • the present invention has been made in order to solve the above-described problems.
  • the capacity of the indoor unit indoor unit
  • damage to piping due to erosion is avoided, and the cooling load or heating load is small. It aims at providing the air conditioning apparatus which can implement
  • the air conditioner according to the present invention includes a compressor, a heat source side heat exchanger, a throttling device, and a heat source side refrigerant circulation circuit that circulates the heat source side refrigerant by connecting the heat source side refrigerant flow paths of the heat exchangers related to heat medium.
  • the refrigerant circulation circuit and the heat medium circulation circuit are cascade-connected so that the heat source side refrigerant and the heat medium exchange heat in the heat exchanger between heat mediums, and the pump is connected to the use side heat exchanger.
  • Each is provided with at least one unit.
  • the air conditioner of the present invention by arranging at least one pump for each indoor unit, the flow rate range of the heat medium flowing through the use side heat exchanger can be increased, so excessive flow velocity is suppressed. can do. Thereby, sufficient capacity adjustment of the indoor unit, avoidance of damage to the piping due to erosion, and sufficient pump input suppression when the cooling load or the heating load is small can be realized. Furthermore, an energy saving effect can be obtained by stopping unnecessary pumps.
  • FIG. 1 It is the schematic which shows the example of installation of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the refrigerant circuit structure in the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a refrigerant circuit figure which shows the flow of the refrigerant
  • FIG. 1 is a schematic diagram illustrating an installation example of an air-conditioning apparatus 100 according to Embodiment 1 of the present invention.
  • the air conditioner 100 according to Embodiment 1 has a refrigeration cycle for circulating refrigerant, and each of the indoor units 3a to 3d can freely select a cooling mode or a heating mode as an operation mode.
  • a system indirect system
  • a heat source side refrigerant a refrigerant
  • the cold or warm heat stored in the heat source side refrigerant is transmitted to a refrigerant (hereinafter referred to as a heat medium) different from the heat source side refrigerant, and the air-conditioning target space is cooled or heated with the cold heat or heat stored in the heat medium.
  • a heat medium can be directly heat exchanged with another heat source such as outdoor air, room air, boiler exhaust heat, etc., and cold heat or heat can be stored in the heat medium.
  • an air conditioner 100 includes an outdoor unit (heat source unit) 1 and a plurality of indoor units (indoor units) 3a to 3d (hereinafter simply referred to as indoor units 3). And a single relay unit 2 interposed between the outdoor unit 1 and the indoor unit 3.
  • the relay unit 2 performs heat exchange between the heat source side refrigerant and the heat medium.
  • the outdoor unit 1 and the relay unit 2 are connected by a refrigerant pipe 4 through which the heat source side refrigerant flows.
  • the relay unit 2 and the indoor unit 3 are connected by a heat medium pipe 5 through which the heat medium flows.
  • the cold or warm heat generated by the outdoor unit 1 is delivered to the indoor unit 3 via the relay unit 2.
  • the outdoor unit 1 is usually disposed in an outdoor space 6 that is a space (for example, a rooftop) outside a building 9 such as a building, and supplies cold or hot energy to the indoor unit 3 via the relay unit 2. .
  • the indoor unit 3 is disposed at a position where cooling air or heating air can be supplied to the indoor space 7 that is a space (for example, a living room) inside the building 9, and the cooling air is supplied to the indoor space 7 that is the air-conditioning target space. Alternatively, heating air is supplied.
  • the relay unit 2 transmits the heat or cold generated by the outdoor unit 1 to the indoor unit 3.
  • the relay unit 2 is configured as a separate housing from the outdoor unit 1 and the indoor unit 3 so as to be installed at a position different from the outdoor space 6 and the indoor space 7.
  • the relay unit 2 is connected to the outdoor unit 1 through the refrigerant pipe 4 and is connected to the indoor unit 3 through the heat medium pipe 5.
  • the heat source side refrigerant is conveyed from the outdoor unit 1 to the relay unit 2 through the refrigerant pipe 4.
  • the conveyed heat source side refrigerant exchanges heat with the heat medium in a heat exchanger between heat mediums (described later) in the relay unit 2 to heat or cool the heat medium. That is, the heat medium is heated or cooled by the heat exchanger between heat mediums to become hot water or cold water.
  • the hot water or cold water produced by the relay unit 2 is conveyed to the indoor unit 3 via the heat medium pipe 5 by a heat medium conveying device (described later), and the indoor unit 3 performs heating operation or cooling for the indoor space 7. Used for driving.
  • the heat medium for example, water, antifreeze, a mixture of water and antifreeze, or a mixture of water and an additive having a high anticorrosive effect can be used.
  • the air conditioning apparatus 100 according to the first embodiment will be described assuming that water is employed as the heat medium.
  • the outdoor unit 1 and the relay unit 2 are connected to the relay unit 2 and each indoor unit 3 via two refrigerant pipes 4. Each is connected via a heat medium pipe 5.
  • each unit (the outdoor unit 1, the relay unit 2, and the indoor unit 3) is connected through the two pipes (the refrigerant pipe 4 and the heat medium pipe 5). It has become easy.
  • the relay unit 2 is installed in a space such as the back of the ceiling (hereinafter simply referred to as a space 8) that is inside the building 9 but is different from the indoor space 7. As shown, it can be installed in other common spaces such as elevators.
  • the indoor unit 3 is a ceiling cassette type is shown as an example, it is not limited to this. In other words, any type may be used as long as heating air or cooling air can be blown into the indoor space 7 directly or via a duct, such as a ceiling-embedded type or a ceiling-suspended type.
  • the outdoor unit 1 may be installed in the outdoor space 6 as an example, it is not limited to this.
  • the outdoor unit 1 may be installed in an enclosed space such as a machine room with a ventilation opening. If the waste heat can be exhausted outside the building 9 by an exhaust duct, the outdoor unit 1 may be installed inside the building 9. It may be installed, or may be installed inside the building 9 when the water-cooled outdoor unit 1 is used. Even if the outdoor unit 1 is installed in such a place, no particular problem occurs.
  • the relay unit 2 may be installed in the vicinity of the outdoor unit 1. However, when the relay unit 2 is installed in the vicinity of the outdoor unit 1 in this way, it is preferable to pay attention to the length of the heat medium pipe 5 that connects the relay unit 2 to the indoor unit 3. This is because if the distance from the relay unit 2 to the indoor unit 3 is increased, the heat transfer power of the heat medium is increased correspondingly, and the energy saving effect is reduced.
  • the number of connected outdoor units 1, relay units 2, and indoor units 3 is not limited to the number illustrated in FIG. 1, and the building 9 in which the air conditioner 100 according to Embodiment 1 is installed. The number of units may be determined according to.
  • the plurality of relay units 2 when connecting a plurality of relay units 2 to one outdoor unit 1, the plurality of relay units 2 are installed in a common space in a building 9 such as a building or a space such as a ceiling. can do. By doing so, an air-conditioning load can be covered with the heat exchanger between heat media in each relay unit 2.
  • the indoor unit 3 can be installed at a distance or height within the allowable transfer range of the heat medium transfer device in each relay unit 2, and can be arranged with respect to the entire building 9 such as a building. Become.
  • FIG. 2 is a diagram illustrating an example of a refrigerant circuit configuration in the air-conditioning apparatus 100 according to Embodiment 1 of the present invention.
  • the heat exchangers 25 a and 25 b provided in the outdoor unit 1 and the relay unit 2 are connected to each other via a refrigerant pipe 4.
  • the indoor unit 3 and the heat exchangers 25 a and 25 b are also connected via the heat medium pipe 5.
  • the heat exchangers 25 a and 25 b exchange heat between the heat source side refrigerant supplied via the refrigerant pipe 4 and the heat medium supplied via the heat medium pipe 5.
  • the air conditioner 100 includes a heat source side refrigerant circulation circuit A that is a refrigeration cycle for circulating the heat source side refrigerant, and a heat medium circulation circuit B that circulates the heat medium, and each indoor unit All of 3 can select a cooling operation and a heating operation.
  • the mode in which all the indoor units 3 in operation execute the heating operation is the heating only operation mode
  • the mode in which all the indoor units 3 in operation execute the cooling operation is the cooling only operation mode
  • the cooling operation is executed.
  • a mode in which the indoor unit 3 and the indoor unit 3 that performs the heating operation are mixed is referred to as an air-conditioning mixed operation mode.
  • the air-conditioning mixed operation mode includes a cooling main operation mode in which the cooling load is larger and a heating main operation mode in which the heating load is larger.
  • Outdoor unit 1 In the outdoor unit 1, a compressor 10, a first refrigerant flow switching device 11, a heat source side heat exchanger 12, and an accumulator 19 are connected and mounted via a refrigerant pipe 4.
  • the outdoor unit 1 is provided with a first connection pipe 4a, a second connection pipe 4b, and check valves 13a to 13d.
  • the air-conditioning apparatus 100 according to Embodiment 1 is in an operation mode such as a heating operation mode or a cooling operation mode. Regardless, the flow of the heat source side refrigerant flowing into the relay unit 2 from the outdoor unit 1 can be made to be in a certain direction.
  • the compressor 10 sucks in the heat source side refrigerant, compresses the heat source side refrigerant to be in a high temperature / high pressure state, and conveys the heat source side refrigerant to the heat source side refrigerant circulation circuit A. It is good to comprise.
  • the compressor 10 has a discharge side connected to the first refrigerant flow switching device 11 and a suction side connected to an accumulator 19.
  • the first refrigerant flow switching device 11 is configured by a four-way valve or the like, and switches the flow of the heat source side refrigerant.
  • the check valve 13d is provided in the refrigerant pipe 4 between the relay unit 2 and the first refrigerant flow switching device 11, and the heat source side refrigerant is only in a predetermined direction (direction from the relay unit 2 to the outdoor unit 1). It allows flow.
  • the check valve 13a is provided in the refrigerant pipe 4 between the heat source side heat exchanger 12 and the relay unit 2, and flows the heat source side refrigerant only in a predetermined direction (direction from the outdoor unit 1 to the relay unit 2). It is acceptable.
  • the check valve 13b is provided in the first connection pipe 4a and causes the heat source side refrigerant discharged from the compressor 10 to flow through the relay unit 2 during the heating operation.
  • the check valve 13c is provided in the second connection pipe 4b, and causes the heat source side refrigerant returned from the relay unit 2 during the heating operation to flow to the suction side of the compressor 10.
  • the first connection pipe 4 a includes a refrigerant pipe 4 between the first refrigerant flow switching device 11 and the check valve 13 d and a refrigerant pipe 4 between the check valve 13 a and the relay unit 2.
  • the second connection pipe 4b includes a refrigerant pipe 4 between the check valve 13d and the relay unit 2, a refrigerant pipe 4 between the heat source side heat exchanger 12 and the check valve 13a, Are connected.
  • FIG. 2 shows an example in which the first connection pipe 4a, the second connection pipe 4b, the check valve 13a, the check valve 13b, the check valve 13c, and the check valve 13d are provided.
  • the present invention is not limited to this, and these are not necessarily provided.
  • the indoor units 3a to 3d are equipped with use side heat exchangers 35a to 35d (hereinafter also simply referred to as use side heat exchangers 35), respectively.
  • the use side heat exchanger 35 includes heat medium flow control devices 34a to 34d (hereinafter also simply referred to as heat medium flow control devices 34) and pumps 31a to 31d (hereinafter simply referred to as heat medium flow control devices 34) via the heat medium pipe 5. Connected to the pump 31). Further, the use side heat exchanger 35 exchanges heat between air supplied from a blower such as a fan (not shown) and a heat medium, and supplies heating air or cooling air to be supplied to the indoor space 7. Is to be generated.
  • a blower such as a fan (not shown)
  • Path switching device 32 four second heat medium flow switching devices 33a to 33d (hereinafter also simply referred to as second heat medium flow switching device 33), and four heat media.
  • Flow rate adjusting devices 34a to 34d (hereinafter , And may be simply referred to as the heat medium flow rate control device 34), it is mounted.
  • the heat exchanger related to heat medium 25a is provided between the expansion device 26a and the second refrigerant flow switching device 28a in the heat source side refrigerant circulation circuit A, and serves to cool the heat medium in the air-conditioning mixed operation mode. It is.
  • the heat exchanger related to heat medium 25b is provided between the expansion device 26b and the second refrigerant flow switching device 28b in the heat source side refrigerant circulation circuit A, and heats the heat medium in the air-conditioning mixed operation mode. It is something to offer.
  • the opening / closing device 27 and the opening / closing device 29 are configured by, for example, electromagnetic valves that can be opened and closed by energization, and open and close a flow path in which they are provided. That is, the opening / closing device 27 and the opening / closing device 29 are controlled to open / close according to the operation mode, and switch the flow path of the heat source side refrigerant.
  • the opening / closing device 27 is provided in the refrigerant pipe 4 on the inlet side of the heat-source-side refrigerant (the refrigerant pipe 4 located at the lowest level in the drawing among the refrigerant pipes 4 connecting the outdoor unit 1 and the relay unit 2).
  • the second refrigerant flow switching device 28 is constituted by a four-way valve or the like, and switches the flow of the heat source side refrigerant so that the heat exchanger related to heat medium 25 acts as a condenser or an evaporator according to the operation mode. .
  • the second refrigerant flow switching device 28a is provided on the downstream side of the heat exchanger related to heat medium 25a in the flow of the heat source side refrigerant in the cooling only operation mode.
  • the second refrigerant flow switching device 28b is provided on the downstream side of the heat exchanger related to heat medium 25b in the flow of the heat source side refrigerant in the cooling only operation mode.
  • the pump 31 circulates the heat medium flowing through the heat medium pipe 5 to the heat medium circuit B.
  • the number of pumps 31 is provided between each use-side heat exchanger 35 and the second heat medium flow switching device 33, and the number according to the number of indoor units 3 installed (four in the first embodiment). Is provided.
  • the pump 31 may be constituted by a capacity-controllable pump, for example, and the flow rate thereof may be adjusted according to the load in the indoor unit 3.
  • the pumps 31a to 31d are provided in the heat medium pipe 5 between the use side heat exchangers 35a to 35d and the second heat medium flow switching devices 33a to 33d. It may be provided in the heat medium pipe 5 between the heat exchangers 35a to 35d and the first heat medium flow switching devices 32a to 32d.
  • one pump is provided for each indoor unit 3.
  • the present invention is not limited to this, and at least one pump may be used.
  • the capacity of the pump 31 is not controllable, and the flow rate of the heat medium flowing through the heat medium pipe 5 is controlled by the heat medium flow control device 34.
  • the first heat medium flow switching device 32 switches the connection between the outlet side of the heat medium flow path of the use side heat exchanger 35 and the inlet side of the heat medium flow path of the heat exchanger related to heat medium 25. .
  • the number of the first heat medium flow switching devices 32 is set according to the number of indoor units 3 installed (four in the first embodiment). In the first heat medium flow switching device 32, one of the three sides is in the heat exchanger 25a, one of the three is in the heat exchanger 25b, and one of the three is in the heat medium flow rate. Each is connected to the adjusting device 34 and provided on the outlet side of the heat medium flow path of the use side heat exchanger 35.
  • the switching of the heat medium flow path includes not only complete switching from one to the other but also partial switching from one to the other.
  • the first heat medium flow switching device 32 may be constituted by a three-way valve, for example.
  • the second heat medium flow switching device 33 switches the connection between the outlet side of the heat medium flow path of the inter-heat medium heat exchanger 25 and the inlet side of the heat medium flow path of the use side heat exchanger 35. .
  • the number of the second heat medium flow switching devices 33 is set according to the number of indoor units 3 installed (four in the first embodiment).
  • one of the three heat transfer medium heat exchangers 25a, one of the three heat transfer medium heat exchangers 25b, and one of the three heat transfer side heats. Each is connected to the exchanger 35 and provided on the inlet side of the heat medium flow path of the use side heat exchanger 35.
  • This is illustrated as a switching device 33d.
  • the switching of the heat medium flow path includes not only complete switching from one to the other but also partial switching from one to the other.
  • the second heat medium flow switching device 33 may be constituted by a three-way valve, for example.
  • the heat medium flow control device 34 is configured by a two-way valve or the like that can control the opening area, and controls the flow rate of the heat medium flowing through the heat medium pipe 5.
  • the number of the heat medium flow control devices 34 is set according to the number of indoor units 3 installed (four in the first embodiment).
  • One of the heat medium flow control devices 34 is connected to the use side heat exchanger 35 and the other is connected to the first heat medium flow switching device 32, and is provided on the outlet side of the heat medium flow channel of the use side heat exchanger 35. It has been. That is, the heat medium flow control device 34 adjusts the amount of the heat medium flowing into the indoor unit 3 according to the temperature of the heat medium flowing into the indoor unit 3 and the temperature of the heat medium flowing out of the indoor unit 3, and according to the indoor load. The optimum amount of heat medium can be provided to the indoor unit 3.
  • the heat medium flow rate adjustment device 34a, the heat medium flow rate adjustment device 34b, the heat medium flow rate adjustment device 34c, and the heat medium flow rate adjustment device 34d are illustrated from the lower side of the drawing.
  • the heat medium flow control device 34 may be provided on the inlet side of the heat medium flow path of the use side heat exchanger 35.
  • the heat medium flow control device 34 may be provided on the inlet side of the heat medium flow path of the use side heat exchanger 35 and between the second heat medium flow switching device 33 and the use side heat exchanger 35. Good.
  • the indoor unit 3 does not require a load such as the stop mode or the thermo OFF, the heat medium supply to the indoor unit 3 can be stopped by fully closing the heat medium flow control device 34.
  • the heat medium flow control device 34 may be omitted. Is possible.
  • the air conditioner 100 includes four heat source side refrigerant temperature detection means 36a to 36d (hereinafter also simply referred to as heat source side refrigerant temperature detection means 36), pressure detection means 37, and four first heat medium temperature detection means 43a. To 43d (hereinafter also simply referred to as first heat medium temperature detecting means 43) and four second heat medium temperature detecting means 44a and 44b (hereinafter also simply referred to as second heat medium temperature detecting means 44). There is).
  • the first heat medium temperature detecting means 43 and the second heat medium temperature detecting means 44 are connected to a control device 51 described later, and these detection results are used for various controls of the air conditioner 100. These can be composed of, for example, a thermistor.
  • the first heat medium temperature detecting means 43 is provided between the first heat medium flow switching device 32 and the heat medium flow control device 34 and detects the temperature of the heat medium flowing out from the use side heat exchanger 35. It is.
  • the number of first heat medium temperature detecting means 43 (four in the first embodiment) according to the number of indoor units 3 installed is provided.
  • the position where the first heat medium temperature detection means 43 is installed is not particularly limited, and may be within the indoor unit 3 or within the relay unit 2.
  • the indoor unit 3 Corresponding to the indoor unit 3, as the first heat medium temperature detecting means 43a, the first heat medium temperature detecting means 43b, the first heat medium temperature detecting means 43c, and the first heat medium temperature detecting means 43d from the lower side of the drawing. It is shown.
  • the second heat medium temperature detection means 44 is provided between the heat exchanger related to heat medium 25 and the second heat medium flow switching device 33, and detects the temperature of the heat medium flowing into the use side heat exchanger 35. It is to detect.
  • the number of the second heat medium temperature detecting means 44 (two in the first embodiment) according to the number of indoor units 3 installed may be provided.
  • the position where the second heat medium temperature detecting means 44 is installed is not particularly limited, and may be in the indoor unit 3 or in the relay unit 2. Further, corresponding to the indoor unit 3, the second heat medium temperature detecting means 44a and the second heat medium temperature detecting means 44b are illustrated from the lower side of the drawing.
  • the heat source side refrigerant temperature detecting means 36 is provided on the inlet side or the outlet side of the heat source side refrigerant of the heat exchanger related to heat medium 25, and the temperature of the heat source side refrigerant flowing into the heat exchanger related to heat medium 25 or the heat between heat medium.
  • the temperature of the heat source side refrigerant that has flowed out of the exchanger 25 is detected, and it may be constituted by a thermistor or the like.
  • the heat source side refrigerant temperature detecting means 36a is provided between the heat exchanger related to heat medium 25a and the second refrigerant flow switching device 28a.
  • the heat source side refrigerant temperature detecting means 36b is provided between the heat exchanger related to heat medium 25a and the expansion device 26a.
  • the heat source side refrigerant temperature detecting means 36c is provided between the heat exchanger related to heat medium 25b and the second refrigerant flow switching device 28b.
  • the heat source side refrigerant temperature detecting means 36d is provided between the heat exchanger related to heat medium 25b and the expansion device 26b.
  • the pressure detection means 37 obtains pressure information for conversion into a saturation temperature used when controlling the opening degree of the expansion device 26, and is provided between the heat exchanger related to heat medium 25b and the expansion device 26b. It has been.
  • the control device 51 is configured by a microcomputer or the like, and the driving frequency of the compressor 10, the rotational speed (including ON / OFF) of the blower (not shown), the first refrigerant flow switching device 11 and the second refrigerant flow switching. Switching of the device 28, opening of the expansion device 26, driving of the pump 31, switching of the switching device 27 and switching device 29, switching of the first heat medium flow switching device 32 and the second heat medium flow switching device 33, heat The opening degree of the medium flow rate adjusting device 34 is controlled. Note that the drive frequency of the compressor 10, the rotational speed of the blower (not shown) (including ON / OFF), and switching of the first refrigerant flow switching device 11 are installed in the outdoor unit 1 and are separate from the control device 51. You may make it execute the outdoor unit control apparatus (illustration omitted) which is a body.
  • the air conditioner 100 includes a compressor 10, a first refrigerant flow switching device 11, a heat source side heat exchanger 12, an opening / closing device 27, an expansion device 26, a heat source side refrigerant flow path of a heat exchanger 25 between the heat medium,
  • the refrigerant flow switching device 28 and the accumulator 19 are connected by the refrigerant pipe 4 to constitute the heat source side refrigerant circulation circuit A.
  • the switching device 32 is connected by the heat medium pipe 5 to constitute the heat medium circulation circuit B. That is, a plurality of use side heat exchangers 35 are connected in parallel to the heat exchangers 25a and 25b, respectively, and the heat medium circulation circuit B has a plurality of systems.
  • the outdoor unit 1 and the relay unit 2 are connected via the heat exchangers 25a and 25b provided in the relay unit 2, and the relay unit 2 and the indoor unit 3 are Similarly, they are connected via heat exchangers 25a and 25b. That is, in the air conditioner 100, heat exchange is performed between the heat source side refrigerant circulating in the heat source side refrigerant circulation circuit A and the heat medium circulating in the heat medium circulation circuit B in the heat exchangers 25a and 25b. It has become.
  • each operation mode which the air conditioning apparatus 100 performs is demonstrated.
  • the air conditioner 100 can perform a cooling operation or a heating operation in the indoor unit 3 based on an instruction from each indoor unit 3. That is, the air conditioner 100 can perform the same operation for all of the indoor units 3 and can perform different operations for each of the indoor units 3.
  • the air conditioning apparatus 100 according to the first embodiment includes four operation modes of normal cooling operation, cooling only operation, cooling main operation, heating only operation, and heating main operation. Below, each operation mode is demonstrated with the flow of a heat-source side refrigerant
  • the low-temperature and low-pressure refrigerant is compressed by the compressor 10 and discharged as a high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 10 flows into the heat source side heat exchanger 12 via the first refrigerant flow switching device 11.
  • heat exchange with the outdoor air is performed by the heat source side heat exchanger 12 (heat is radiated to the outdoor air) to become a high-temperature / high-pressure liquid or a two-phase refrigerant.
  • the second refrigerant flow switching devices 28a and 28b are communicated with the low-pressure pipe.
  • the expansion device 26a has a constant superheat (degree of superheat) obtained as a difference between the temperature detected by the heat source side refrigerant temperature detecting means 36a and the temperature detected by the heat source side refrigerant temperature detecting means 36b. The opening degree is controlled.
  • the expansion device 26b has an opening degree so that the superheat obtained as the difference between the temperature detected by the heat source side refrigerant temperature detecting means 36c and the temperature detected by the heat source side refrigerant temperature detecting means 36d is constant. Is controlled.
  • the heat medium flows out from the use side heat exchangers 35a and 35b and flows into the heat medium flow control devices 34a and 34b.
  • the flow rate of the heat medium is controlled to a flow rate necessary to cover the air conditioning load required indoors by the action of the heat medium flow rate adjusting devices 34a and 34b, and flows into the use side heat exchangers 35a and 35b. It is supposed to be.
  • the heat medium flowing out from the heat medium flow control devices 34a and 34b flows into the heat exchangers 25a and 25b through the first heat medium flow switching devices 32a and 32b, and passes through the indoor unit 3 to the indoor space 7.
  • the second heat medium flow switching devices 33a and 33b After passing through the second heat medium flow switching devices 33a and 33b, the amount of heat absorbed from the heat is transferred to the heat source side refrigerant side and then sucked into the pumps 31a and 31b again.
  • the first heat medium flow switching devices 32a and 32b and the second heat medium flow switching devices 33a and 33b are provided so that flow paths flowing through the heat exchangers 25a and 25b are ensured. It is controlled to an intermediate opening or an opening corresponding to the heat medium temperature at the outlet of the heat exchangers 25a and 25b.
  • the use side heat exchangers 35a and 35b are controlled by the heat medium flow control devices 34a and 34b based on the temperature difference between the inlet and the outlet.
  • the high-temperature and high-pressure liquid or two-phase refrigerant that has flowed out of the heat source side heat exchanger 12 flows out of the outdoor unit 1 through the check valve 13a.
  • the high-temperature / high-pressure liquid or two-phase refrigerant that has flowed out of the outdoor unit 1 flows into the relay unit 2 through the refrigerant pipe 4.
  • the high-temperature / high-pressure liquid or the two-phase refrigerant that has flowed into the relay unit 2 flows into the heat exchanger related to heat medium 25b that acts as a condenser through the second refrigerant flow switching device 28b.
  • the first refrigerant flow switching device 11 is connected to the relay unit without the heat source side refrigerant discharged from the compressor 10 passing through the heat source side heat exchanger 12. Switch to flow into 2.
  • the pumps 31a and 31b are driven, the heat medium flow control devices 34a and 34b are opened, and the heat between the heat exchangers 25a and 25b and the use side heat exchangers 35a and 35b are heated.
  • the medium is circulated.
  • the second refrigerant flow switching devices 28a and 28b are switched to the heating side, the opening / closing device 27 is closed, and the opening / closing device 29 is open.
  • the low-temperature and low-pressure refrigerant is compressed by the compressor 10 and discharged as a high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 10 passes through the first refrigerant flow switching device 11, flows through the first connection pipe 4a, passes through the check valve 13b, and flows out of the outdoor unit 1.
  • the high-temperature and high-pressure gas refrigerant that has flowed out of the outdoor unit 1 flows into the relay unit 2 through the refrigerant pipe 4.
  • the heat medium flows out from the use side heat exchangers 35a and 35b and flows into the heat medium flow control devices 34a and 34b.
  • the flow rate of the heat medium is controlled to a flow rate necessary to cover the air conditioning load required indoors by the action of the heat medium flow rate adjusting devices 34a and 34b, and flows into the use side heat exchangers 35a and 35b. It is like that.
  • the heat medium flowing out from the heat medium flow control devices 34a and 34b flows into the heat exchangers 25a and 25b through the first heat medium flow switching devices 32a and 32b, and passes through the indoor unit 3 to the indoor space 7.
  • the amount of heat supplied to is received from the heat source side refrigerant side, and after being passed through the second heat medium flow switching devices 33a and 33b, is sucked into the pumps 31a and 31b again.
  • the first heat medium flow switching device is routed from the second heat medium flow switching devices 33a and 33b via the heat medium flow control devices 34a and 34b.
  • the heat medium flows in the direction to 32a and 32b.
  • the air conditioning load required in the indoor space 7 is such that the difference between the detection result of the first heat medium temperature detection means 43 and the detection result of the second heat medium temperature detection means 44 is kept at the target value. This can be provided by controlling the flow rate of the heat medium flowing into the indoor units 3a and 3b with the flow rate adjusting devices 34a and 34b.
  • FIG. 6 is a refrigerant circuit diagram illustrating a refrigerant flow in the heating main operation mode of the air-conditioning mixed operation mode of the air-conditioning apparatus 100 illustrated in FIG. 2.
  • FIG. 6 illustrates the heating-main operation mode of the mixed heating / cooling operation mode when a heating load is generated in the use side heat exchangers 35b to 35d and a cooling load is generated in the use side heat exchanger 35a.
  • the piping represented by the thick line has shown the piping through which the heat source side refrigerant
  • the flow direction of the heat source side refrigerant is indicated by solid line arrows, and the flow direction of the heat medium is indicated by broken line arrows.
  • the heat source side refrigerant discharged from the compressor 10 is relayed through the first refrigerant flow switching device 11 without passing through the heat source side heat exchanger 12.
  • Switch to unit 2 the pumps 31a to 31d are driven to open the heat medium flow control devices 34a to 34d, and between the heat exchanger related to heat medium 25a and the use side heat exchanger 35a where the cooling load is generated, The heat medium circulates between the heat exchanger 25b between the heat medium and the use side heat exchangers 35b to 35d where the heat load is generated.
  • the second refrigerant flow switching device 28a is switched to the cooling side, the second refrigerant flow switching device 28b is switched to the heating side, the expansion device 26a is fully opened, the opening / closing device 27 is closed, and the opening / closing device 29 is closed. ing.
  • the low-temperature and low-pressure refrigerant is compressed by the compressor 10 and discharged as a high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 10 passes through the first refrigerant flow switching device 11, flows through the first connection pipe 4a, passes through the check valve 13b, and flows out of the outdoor unit 1.
  • the high-temperature and high-pressure gas refrigerant that has flowed out of the outdoor unit 1 flows into the relay unit 2 through the refrigerant pipe 4.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the relay unit 2 flows into the heat exchanger related to heat medium 25b that acts as a condenser via the second refrigerant flow switching device 28b.
  • the high-temperature and high-pressure gas refrigerant that has flowed into the heat exchanger related to heat medium 25b condenses and liquefies while dissipating heat to the heat medium circulating in the heat medium circuit B, and becomes a liquid refrigerant.
  • the liquid refrigerant flowing out of the heat exchanger related to heat medium 25b is expanded by the expansion device 26b and becomes a low-pressure two-phase refrigerant. This low-pressure two-phase refrigerant flows into the heat exchanger related to heat medium 25a acting as an evaporator via the expansion device 26a.
  • the heat of the heat source side refrigerant is transmitted to the heat medium in the heat exchanger related to heat medium 25b, and the heated heat medium is caused to flow in the heat medium pipe 5 by the pumps 31b to 31d. Further, the cold heat of the heat source side refrigerant is transmitted to the heat medium by the heat exchanger related to heat medium 25a, and the cooled heat medium is caused to flow in the heat medium pipe 5 by the pump 31a.
  • the heat medium that has been pressurized and flowed out by the pump 31a flows into the use side heat exchanger 35a in which a cold load is generated, and the heat medium that has been pressurized and discharged by the pumps 31b to 31d generates a heat load. It flows into the use side heat exchangers 35b to 35d.
  • the heat medium that has been used for the heating operation and has passed through the use side heat exchangers 35b to 35d and whose temperature has decreased passes through the heat medium flow control devices 34b to 34d and the first heat medium flow switching devices 32b to 32d, After flowing into the inter-medium heat exchanger 25b and passing through the second heat medium flow switching devices 33b to 33d, they are sucked into the pumps 31b to 31d again.
  • the first heat medium flow switching device 32 is switched and connected in the direction in which the heat exchanger related to heat medium 25b is connected.
  • the indoor unit 3 is switched to the direction in which the heat exchanger related to heat medium 25a is connected.
  • the first heat medium flow switching is performed from the second heat medium flow switching device 33 via the heat medium flow control device 34 on both the heating side and the cooling side.
  • a heat medium flows in the direction to the device 32.
  • the air conditioning load required in the indoor space 7 is that between the first heat medium temperature detecting means 43 and the second heat medium temperature detecting means 44 corresponding to the heating use side heat exchanger 35 on the heating side.
  • the difference between the detection results is the difference between the detection results of the first heat medium temperature detection means 43 and the second heat medium temperature detection means 44 corresponding to the cooling use side heat exchanger 35 on the cooling side. It can be covered by controlling the flow rate of the heat medium flowing into the indoor unit 3 with the heat medium flow control device 34 so as to keep the value.
  • the pump 31 of the applicable indoor unit 3 is stopped.
  • FIG. FIG. 7 is a diagram illustrating another example (first example) of the refrigerant circuit configuration in the air-conditioning apparatus 100 according to Embodiment 2 of the present invention.
  • the second embodiment will be described, but those overlapping with the first embodiment will be omitted.
  • the capacity of the pumps 45a to 45d mounted on the relay unit 2 can be controlled, and the flow rate of the heat medium flowing through the heat medium pipe 5 can be controlled.
  • the heat medium flow control device 34 mounted in the first embodiment is not necessary and need not be installed. Therefore, the amount of the heat medium flowing into the indoor unit 3 can be adjusted by the capacity control of the pumps 45a to 45d, and the optimum heat medium amount corresponding to the indoor load can be provided to the indoor unit 3.
  • FIG. FIG. 8 is a diagram illustrating another example (second example) of the refrigerant circuit configuration in the air-conditioning apparatus 100 according to Embodiment 3 of the present invention.
  • a control device 51 is provided for each indoor unit 3 as shown in FIG.
  • the pump 31, the heat medium flow control device 34, the first heat medium temperature detection means 43, and the second heat medium temperature detection means 44 are also installed for each indoor unit 3.
  • the first heat medium temperature detecting means 43 is provided between the heat medium flow control device 34 and the use side heat exchanger 35
  • the second heat medium temperature detecting means 44 is the pump 31 and the use side heat exchanger. 35.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention porte sur un climatiseur, qui comprend : un circuit de circulation de réfrigérant côté source de chaleur (A) pour faire circuler un réfrigérant côté source de chaleur, dans lequel un compresseur (10), un échangeur de chaleur côté source de chaleur (10), un dispositif d'étranglement (26) et une trajectoire d'écoulement de réfrigérant côté source de chaleur à partir d'un échangeur de chaleur entre agents caloporteurs (25) sont reliés par l'intermédiaire d'un tuyau ; et un circuit de circulation d'agent caloporteur (B) pour faire circuler un agent caloporteur, dans lequel une pompe (31), au moins un échangeur de chaleur côté utilisation (35) et une trajectoire d'écoulement d'agent caloporteur à partir de l'échangeur de chaleur entre agents caloporteurs (25) sont reliés par l'intermédiaire d'un tuyau. Le circuit de circulation de réfrigérant côté source de chaleur (A) et le circuit de circulation d'agent caloporteur (B) sont reliés en cascade, de telle sorte que le réfrigérant côté source de chaleur et l'agent caloporteur échangent de la chaleur au niveau de l'échangeur de chaleur entre agents caloporteurs (25). Au moins une pompe (31) est disposée sur chaque échangeur de chaleur côté utilisation (35).
PCT/JP2013/083304 2013-12-12 2013-12-12 Climatiseur WO2015087421A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019193712A1 (fr) * 2018-04-05 2019-10-10 三菱電機株式会社 Dispositif de climatisation
JP2021046953A (ja) * 2019-09-17 2021-03-25 東芝キヤリア株式会社 空気調和機
US11060779B2 (en) * 2018-02-07 2021-07-13 Mitsubishi Electric Corporation Air-conditioning system and air-conditioning control method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010050001A1 (fr) * 2008-10-29 2010-05-06 三菱電機株式会社 Conditionneur d'air

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010050001A1 (fr) * 2008-10-29 2010-05-06 三菱電機株式会社 Conditionneur d'air

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11060779B2 (en) * 2018-02-07 2021-07-13 Mitsubishi Electric Corporation Air-conditioning system and air-conditioning control method
WO2019193712A1 (fr) * 2018-04-05 2019-10-10 三菱電機株式会社 Dispositif de climatisation
JPWO2019193712A1 (ja) * 2018-04-05 2021-01-14 三菱電機株式会社 空気調和装置
JP7069298B2 (ja) 2018-04-05 2022-05-17 三菱電機株式会社 空気調和装置
JP2021046953A (ja) * 2019-09-17 2021-03-25 東芝キヤリア株式会社 空気調和機
JP7360285B2 (ja) 2019-09-17 2023-10-12 東芝キヤリア株式会社 空気調和機

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