WO2015079531A1 - Climatiseur - Google Patents

Climatiseur Download PDF

Info

Publication number
WO2015079531A1
WO2015079531A1 PCT/JP2013/082039 JP2013082039W WO2015079531A1 WO 2015079531 A1 WO2015079531 A1 WO 2015079531A1 JP 2013082039 W JP2013082039 W JP 2013082039W WO 2015079531 A1 WO2015079531 A1 WO 2015079531A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
refrigerant
heat medium
expansion
heat exchanger
Prior art date
Application number
PCT/JP2013/082039
Other languages
English (en)
Japanese (ja)
Inventor
祐治 本村
嶋本　大祐
博文 ▲高▼下
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/JP2013/082039 priority Critical patent/WO2015079531A1/fr
Priority to JP2015550265A priority patent/JPWO2015079531A1/ja
Publication of WO2015079531A1 publication Critical patent/WO2015079531A1/fr

Links

Images

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
    • F25B11/00—Compression machines, plants or systems, using turbines, e.g. gas turbines
    • F25B11/02—Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders
    • 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
    • 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
    • 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
    • F24F11/70—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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • 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
    • F25B2313/027—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
    • F25B2313/02732—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two three-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
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/14—Power generation using energy from the expansion of the refrigerant
    • 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
    • F25B2600/2507—Flow-diverting 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide

Definitions

  • the present invention relates to an air conditioner applied to, for example, a building multi air conditioner.
  • an air conditioner such as a multi air conditioning system for buildings
  • a refrigerant is used between an outdoor unit (outdoor unit) that is a heat source unit arranged outside a building and an indoor unit (indoor unit) arranged inside a building. Circulate. And the refrigerant
  • an HFC (hydrofluorocarbon) refrigerant is often used.
  • a natural refrigerant such as carbon dioxide (CO 2 ) has been proposed.
  • a waste heat recovery type chiller which is connected to four water pipes between the heat source unit and the indoor unit, supplies cooled and heated water at the same time, and can freely select cooling or heating in the indoor unit (For example, refer to Patent Document 2).
  • a refrigerant such as water is circulated from the outdoor unit to the repeater and a heat medium such as water is circulated from the repeater to the indoor unit.
  • a heat medium such as water is circulated from the repeater to the indoor unit.
  • Japanese Patent Laying-Open No. 2005-140444 page 4, FIG. 1, etc.
  • JP-A-5-280818 (4th, 5th page, FIG. 1 etc.
  • Japanese Patent Laid-Open No. 2001-289465 pages 5 to 8, FIG. 1, FIG. 2, etc.
  • JP 2003-343936 A (Page 5, FIG. 1)
  • WO2010 / 049998 (3rd page, FIG. 1 etc.)
  • the refrigerant conveyed to the refrigerant-heat medium heat exchanger needs to be a high temperature high pressure or a low temperature low pressure, and the refrigerant is compressed in the refrigerant circuit, By repeating the expansion, heat exchange between the refrigerant and the heat medium is realized.
  • the refrigerant is expanded from the high temperature and high pressure to the low temperature and low pressure, there is expansion energy associated with the expansion of the refrigerant.
  • the air conditioner in order to transport the heated or cooled heat medium to the connected indoor units, external heat is required to drive the heat medium transport apparatus and the heat medium transport apparatus. is there.
  • the refrigerant conveyed to the refrigerant-heat medium heat exchanger for heating or cooling the heat medium is repeatedly compressed and expanded at high temperature, high pressure or low temperature and low pressure, and the expansion process
  • expansion energy exists, it has not been utilized as energy and has not fully utilized the energy saving performance as a system.
  • the air conditioner if the expansion energy generated when the refrigerant is expanded can be used for the power of the heat medium transport device necessary for transporting the heat medium, energy saving as a system can be achieved. Furthermore, if the number of parts can be reduced by this, it is possible to save space as a system.
  • the present invention has been made in order to solve the above-described problems.
  • the present invention can save energy. It aims at providing the air conditioning apparatus which improved the.
  • An air conditioner includes a compressor, a heat source side heat exchanger, a plurality of expansion devices, a refrigerant side flow path of a plurality of heat exchangers between heat media, and a plurality of refrigerant flow switching devices that switch a refrigerant circulation path.
  • a refrigerant circulation circuit that circulates the heat source side refrigerant by connecting with a refrigerant pipe, a plurality of use side heat exchangers, and a heat medium side flow path of the plurality of heat exchangers between the heat mediums are connected by a heat medium pipe.
  • a heat medium circulation circuit that circulates the heat medium, and the heat source side refrigerant and the heat medium exchange heat in the heat exchanger between the heat medium, wherein the heat medium circulation circuit includes a plurality of the heat medium circulation circuits.
  • a heat medium transport device that uses the expansion power of the heat source side refrigerant expanded by the expansion device as the power for transporting the heat medium.
  • the expansion power accompanying expansion of the heat-source-side refrigerant flowing in by the heat medium transport device can be converted into power necessary for heat medium transport, and the heat medium can be transported.
  • FIG. 1 is a schematic diagram illustrating an installation example of an air conditioner according to an embodiment of the present invention. Based on FIG. 1, the installation example of an air conditioning apparatus is demonstrated.
  • This air conditioner uses a refrigeration cycle (refrigerant circulation circuit A, heat medium circulation circuit B) that circulates refrigerant (heat source side refrigerant, heat medium) so that each indoor unit can be in the cooling mode or the heating mode as an operation mode. You can choose freely.
  • FIG. 1 schematically shows an entire air conditioner connecting a plurality of indoor units 3.
  • the relationship of the size of each component may be different from the actual one.
  • the air-conditioning apparatus includes an outdoor unit (heat source unit) 1, a plurality of indoor units 3, and one relay interposed between the outdoor unit 1 and the indoor unit 3. And a unit 2.
  • 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 that conducts the heat source side refrigerant.
  • the relay unit 2 and the indoor unit 3 are connected by a pipe (heat medium pipe) 5 that conducts the heat medium.
  • 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 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 refrigerant pipe 4 and the pipe 5 are respectively connected to transmit cold heat or hot heat supplied from the outdoor unit 1 to the indoor unit 3.
  • 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 medium to be described later in the relay unit 2 to heat or cool the heat medium. That is, hot water or cold water is produced by the heat exchanger between heat media.
  • Hot water or cold water produced by the relay unit 2 is transported to the indoor unit 3 through the pipe 5 by a heat medium transport device to be described later, and the indoor unit 3 performs heating operation (operation requiring hot water). It may be in a state) or a cooling operation (an operation state requiring cold water may be used). At this time, the hot water or the cold water is conveyed to the indoor unit 3 selected by the heat medium flow switching flow rate adjusting device described later.
  • heat source side refrigerant examples include single refrigerants such as R-22, R-134a, and R-32, pseudo-azeotropic mixed refrigerants such as R-410A and R-404A, and non-azeotropic mixed refrigerants such as R-407C.
  • a refrigerant or mixture thereof containing a double bond in the chemical formula and having a relatively low global warming coefficient such as CF 3 CF ⁇ CH 2 , or a natural refrigerant such as CO 2 or propane can be used.
  • heat medium for example, water, antifreeze, a mixture of water and antifreeze, a mixture of water and an additive having a high anticorrosive effect, or the like can be used.
  • the outdoor unit 1 and the relay unit 2 use two refrigerant pipes 4, and the relay unit 2 and each indoor unit 3 have two. These pipes 5 are connected to each other.
  • each unit outdoor unit 1, indoor unit 3, and relay unit 2 using two pipes (refrigerant pipe 4, pipe 5). Construction is 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.
  • a space 8 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.
  • the relay unit 2 may be installed in any place as long as it is outside the ceiling or other than the living space and has some ventilation with the outside. It can also be installed in a space that is ventilated. Further, the relay unit 2 can be installed in the vicinity of the outdoor unit 1. However, it should be noted that if the distance from the relay unit 2 to the indoor unit 3 is too long, the transfer power of the heat medium becomes considerably large, so that the effect of energy saving is reduced.
  • FIG. 1 shows an example in which the outdoor unit 1 is installed in the outdoor space 6, but the present invention 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 indoor unit 3 is a ceiling cassette type
  • the present invention is not limited to this, and the indoor unit 3 is directly or directly connected to the indoor space 7 such as a ceiling embedded type or a ceiling suspended type.
  • the air for heating or the air for cooling can be blown out, any kind may be used.
  • the indoor unit 3 to be connected even if heating air or cooling air cannot be blown into the indoor space 7, hot water or cold water from the relay unit 2 such as a panel heater or a floor heating device is used. Even if it is a unit aiming at the function of giving a heating effect or a cooling effect to the indoor space 87, no particular problem occurs.
  • the number of connected outdoor units 1, indoor units 3, and relay units 2 is not limited to the number shown in FIG. 1, but according to the building 9 in which the air conditioner according to the present embodiment is installed. What is necessary is just to determine the number.
  • the plurality of relay units 2 When a plurality of relay units 2 are connected to one outdoor unit 1, the plurality of relay units 2 may be installed in a shared space in a building such as a building or in a space such as a ceiling. it can. 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 on the entire building such as a building. .
  • FIG. 2 is a schematic circuit configuration diagram showing an example of a circuit configuration of the air conditioning apparatus according to the present embodiment (hereinafter referred to as the air conditioning apparatus 100).
  • the structure of the air conditioning apparatus 100 ie, the effect
  • the outdoor unit 1 and the relay unit 2 include a heat exchanger related to heat medium (refrigerant-water heat exchanger) 25 a and a heat exchanger related to heat medium (refrigerant—) provided in the relay unit 2.
  • the refrigerant pipe 4 is connected via a water heat exchanger 25b.
  • the relay unit 2 and the indoor unit 3 are connected by the pipe 5 via the heat exchanger related to heat medium 25 a, the heat exchanger related to heat medium 25 b, and the heat medium flow switching flow rate adjusting device 40.
  • Outdoor unit 1 In the outdoor unit 1, a compressor 10, a first refrigerant flow switching device 11 such as a four-way valve, a heat source side heat exchanger 12, and an accumulator 19 are connected and connected in series through a refrigerant pipe 4. Yes.
  • the outdoor unit 1 is also provided with a refrigerant connection pipe 4a, a refrigerant connection pipe 4b, a check valve 13a, a check valve 13b, a check valve 13c, and a check valve 13d.
  • relay connection pipe 4a, refrigerant connection pipe 4b, check valve 13a, check valve 13b, check valve 13c, and check valve 13d are provided.
  • the flow of the heat source side refrigerant flowing into the unit 2 can be in a certain direction.
  • the compressor 10 sucks the heat source side refrigerant, compresses the heat source side refrigerant, and transfers it to the refrigerant circulation circuit A in a high temperature / high pressure state. Good.
  • the first refrigerant flow switching device 11 is in the refrigerant circulation path that is the flow of the heat source side refrigerant in the heating operation mode (in the heating only operation mode and in the heating main operation mode) and in the cooling operation mode (in the cooling only operation mode and The refrigerant circulation path which is the flow of the heat source side refrigerant in the cooling main operation mode) is switched.
  • the heat source side heat exchanger 12 functions as an evaporator during heating operation, functions as a condenser (or radiator) during cooling operation, and fluid such as air supplied from a blower such as a fan (not shown) and the heat source side Heat exchange is performed with the refrigerant, and the heat source side refrigerant is vaporized or condensed and liquefied.
  • the accumulator 19 is provided on the suction side of the compressor 10 and stores excess refrigerant due to a difference between the heating operation and the cooling operation, or excess refrigerant with respect to a transient change in operation.
  • the check valve 13c 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 13d is provided in the refrigerant 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 13b is provided in the refrigerant 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 refrigerant connection pipe 4 a includes a refrigerant pipe 4 between the first refrigerant flow switching device 11 and the check valve 13 c, and a refrigerant pipe 4 between the check valve 13 a and the relay unit 2.
  • the refrigerant connection pipe 4b includes a refrigerant pipe 4 between the check valve 13c 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 refrigerant connection pipe 4a, the refrigerant 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.
  • Each indoor unit 3 is equipped with a use side heat exchanger 35.
  • the use side heat exchanger 35 is connected to the heat medium flow switching flow rate adjusting device 40 of the relay unit 2 through the pipe 5.
  • 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 generate
  • FIG. 2 shows an example in which four indoor units 3 are connected to the relay unit 2, which are illustrated as an indoor unit 3 a, an indoor unit 3 b, an indoor unit 3 c, and an indoor unit 3 d from the upper side of the drawing.
  • the use side heat exchanger 35 also has a use side heat exchanger 35a, a use side heat exchanger 35b, a use side heat exchanger 35c, and a use side heat exchanger from the upper side of the drawing. It is illustrated as 35d.
  • the number of indoor units 3 connected is not limited to the four shown in FIG.
  • the relay unit 2 includes two or more heat exchangers for heat medium 25, two refrigerant expansion heat medium transfer devices 60, two switch devices (switch devices 27, switch devices 29), and two second refrigerants.
  • a flow path switching device 28 and four heat medium flow path switching flow rate adjustment devices 40 are mounted.
  • the two heat exchangers for heat medium 25 are provided with a condenser (when the heat is supplied to the indoor unit 3 in the heating operation).
  • a condenser when the heat is supplied to the indoor unit 3 in the heating operation.
  • the indoor unit 3 When supplying cold heat to the indoor unit 3 that is in the cooling operation as a radiator, it functions as an evaporator, performs heat exchange between the heat-source-side refrigerant and the heat medium, and is generated by the outdoor unit 1
  • the cold heat or warm heat stored in the side refrigerant is transmitted to the heat medium.
  • the heat exchanger related to heat medium 25a is provided between the refrigerant expansion heat medium transfer device 60a and the second refrigerant flow switching device 28a in the refrigerant circulation circuit A, and cools the heat medium in the cooling / heating mixed operation mode. It is for use.
  • the heat exchanger related to heat medium 25b is provided between the refrigerant expansion heat medium transfer device 60b and the second refrigerant flow switching device 28b in the refrigerant circulation circuit A, and is used in the cooling / heating mixed operation mode. It is used for heating.
  • the two refrigerant expansion heat medium conveyance devices 60 (the refrigerant expansion heat medium conveyance device 60a and the refrigerant expansion heat medium conveyance device 60b) have functions as throttle devices such as a pressure reducing valve and an expansion valve.
  • the heat source side refrigerant is decompressed and expanded.
  • the refrigerant expansion heat medium transfer device 60a is provided on the upstream side of the heat exchanger related to heat medium 25a in the flow of the heat source side refrigerant during the cooling operation.
  • the refrigerant expansion heat medium transport device 60b is provided on the upstream side of the heat exchanger related to heat medium 25b in the flow of the heat source side refrigerant during the cooling operation.
  • the two refrigerant expansion heat medium transport devices 60 also have a function as a heat medium transport device described later. Therefore, the refrigerant expansion heat medium transport device 60 is preferably configured by integrating the expansion device and the heat medium transport device. However, in the case where power more than the power necessary for transporting the heat medium is obtained by decompression and expansion of the heat source side refrigerant, or when the power necessary for heat medium transport is adjusted, it is omitted in FIG. It is also possible to provide a bypass circuit with an expansion valve or a throttling device for each refrigerant expansion heat transfer device 60. By doing so, the two refrigerant expansion heat medium transfer devices 60 can obtain stable expansion power from the refrigerant circuit A.
  • the two refrigerant expansion heat medium conveying devices 60 also have a function as a heat source device conveying device that circulates the heat medium conducted through the pipe 5 to the heat medium circulation circuit B.
  • the refrigerant expansion heat medium transfer device 60 a is provided in the pipe 5 between the heat exchanger related to heat medium 25 a and the heat medium flow switching flow rate adjusting device 40.
  • the refrigerant expansion heat medium transport device 60 b is provided in the pipe 5 between the heat exchanger related to heat medium 25 b and the heat medium flow switching flow rate adjusting device 40.
  • the two refrigerant expansion heat medium conveying devices 60 can also be provided with a bypass circuit with an adjustment valve capable of flowing the heat medium in each of the heat medium circulation circuits B, whereby the heat medium circulation circuit B is provided. It is also possible to adjust the flow rate of the circulating heat medium.
  • FIG. 7 is a conceptual diagram conceptually showing the configuration of the refrigerant expansion heat medium transport device 60 mounted on the air conditioning apparatus 100.
  • FIG. 7 a part of a general configuration of the refrigerant expansion heat medium transport device 60 is illustrated.
  • Arrows X1 and X2 shown in FIG. 7 indicate the flow of the heat source side refrigerant.
  • Arrows Y1 and Y2 shown in FIG. 7 indicate the flow of the heat medium.
  • Z1 shown in FIG. 7 indicates that both the refrigerant circuit A and the heat medium circuit B are rotating coaxially.
  • An arrow Z2 shown in FIG. 7 indicates conversion and propagation of the refrigerant expansion power into the rotational power.
  • the refrigerant expansion heat medium transfer device 60 has a sealed container 69 in which an internal space is partitioned by a partition plate 65. Of the spaces partitioned by the partition plate 65, the space below the paper surface functions as a refrigerant expansion chamber 60A for expanding the heat source side refrigerant. Of the spaces partitioned by the partition plate 65, the space on the upper side of the drawing functions as a heat medium transfer chamber 60B for circulating the heat medium.
  • the refrigerant expansion chamber 60A communicates with the refrigerant circulation circuit A via a refrigerant inlet 61 serving as an inlet for the heat source side refrigerant and a refrigerant outlet 62 serving as an outlet for the heat source side refrigerant.
  • the heat medium transfer chamber 60B communicates with the heat medium circuit B through a heat medium inlet 63 serving as a heat medium inlet and a heat medium outlet 64 serving as a heat medium outlet.
  • the refrigerant expansion heat medium transfer device 60 has a shaft 66 that penetrates the central portion of the partition plate 65.
  • the shaft 66 is rotated by power generated when the heat source side refrigerant is expanded in the refrigerant expansion chamber 60A, and the heat medium in the heat medium transfer chamber 60B is transferred to the heat medium circulation circuit B by this rotational force (shown in FIG. 7). Arrows Z1, Z2).
  • the high-pressure heat source side refrigerant flows into the refrigerant expansion chamber 60A of the refrigerant expansion heat medium transport device 60 through the refrigerant inlet 61 (arrow X1 shown in FIG. 7).
  • the heat source side refrigerant is squeezed and expanded in the refrigerant expansion chamber 60A.
  • expansion energy (refrigerant expansion power) is generated.
  • the generated refrigerant expansion power propagates as rotation power to the heat medium transfer chamber 60B connected coaxially via the shaft 66 (arrows Z1 and Z2 shown in FIG. 7).
  • the expanded heat source side refrigerant flows out of the refrigerant expansion heat medium transport device 60 through the refrigerant outlet 62 (arrow X2 shown in FIG. 7).
  • the heat medium also flows into the heat medium transfer chamber 60B of the refrigerant expansion heat medium transfer device 60 through the heat medium inlet 63 (arrow Y1 shown in FIG. 7), and the shaft is connected coaxially in the heat medium transfer chamber 60B. It flows out of the refrigerant expansion heat transfer device 60 by the rotational power generated by the refrigerant expansion power propagated through 66 (arrow Y2 shown in FIG. 7). The heat medium that has flowed out of the refrigerant expansion heat medium transport device 60 via the heat medium outlet 64 is transported to the use side heat exchanger 35.
  • the expansion power of the heat source side refrigerant is propagated to the heat medium as rotational power and used as heat medium conveyance power.
  • the present invention is not limited to this.
  • there is no problem with any structure as long as the structure can use the expansion power from the refrigerant as the heat transfer power of the heat medium, not the rotational power.
  • the two opening / closing devices are configured by electromagnetic valves or the like that can be opened and closed by energization, and open / close the refrigerant pipe 4. That is, the opening and closing of the two opening / closing devices is controlled according to the operation mode, and the flow path of the heat source side refrigerant is switched.
  • 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 opening / closing device 29 is provided in a pipe (bypass pipe 20) connecting the refrigerant pipe 4 on the inlet side of the heat source side refrigerant and the refrigerant pipe 4 on the outlet side.
  • the opening / closing device 27 and the opening / closing device 29 may be any devices that can switch the refrigerant flow path.
  • an electronic expansion valve or the like that can variably control the opening degree may be used.
  • the two second refrigerant flow switching devices 28 are constituted by, for example, a four-way valve or the like, and the heat exchanger related to heat medium according to the operation mode.
  • the flow of the heat source side refrigerant is switched so that 25 acts as a condenser or an evaporator.
  • 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 during the cooling operation.
  • 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 four heat medium flow path switching flow rate adjusting devices 40 are configured by one drive device, a valve body, and the like. Are switched between the heat exchanger related to heat medium 25a and the heat exchanger related to heat medium 25b, and the flow rate of the heat medium for each branch is adjusted.
  • the heat medium flow switching device 40 has both a function as a heat medium flow switching device and a function as a heat medium flow control device.
  • the heat medium flow switching flow rate adjusting device 40 is provided with a number (four in this case) corresponding to the number of indoor units 3 installed, and can be connected to each other. It is.
  • the heat medium flow switching flow rate adjusting device 40 one of them is connected to the heat exchanger related to heat medium 25a and the other is connected to the heat exchanger related to heat medium 25b. It is also connected to the 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 four heat medium flow switching flow adjustment devices 40 can also adjust the flow rate, and by adjusting the opening area, The flow rate of the heat medium flowing through the pipe 5 is controlled.
  • One of the heat medium flow switching flow rate adjusting devices 40 is connected to the use side heat exchanger 35 and the other is connected to the heat exchanger related to heat medium 25. That is, the heat medium flow switching flow rate adjusting device 40 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, according to the indoor load. The optimum amount of heat medium can be provided to the indoor unit 3.
  • the heat medium flow path switching flow rate adjustment device 40 When the indoor unit 3 does not require a load such as stop or thermo OFF, or when it is desired to shut off the heat medium flow path due to maintenance or the like, the heat medium flow path switching flow rate adjustment device 40 is fully closed. As a result, the supply of the heat medium to the indoor unit 3 can be stopped.
  • the relay unit 2 is provided with a temperature sensor 55 (temperature sensor 55a, temperature sensor 55b) for detecting the temperature of the heat medium on the outlet side of the heat exchanger 25 between heat mediums.
  • Information (temperature information) detected by the temperature sensor 55 is sent to a control device 50 that performs overall control of the operation of the air conditioner 100, and the driving frequency of the compressor 10, the rotational speed of the blower not shown, and the first refrigerant. This is used for control such as switching of the flow path switching device 11, switching of the second refrigerant flow switching device 28, switching of the flow path of the heat medium, adjustment of the heat medium flow rate of the indoor unit 3, and the like.
  • the control apparatus 50 has shown in the example the state mounted in the relay unit 2, it is not limited to this, It mounts so that communication is possible in the outdoor unit 1 or the indoor unit 3, or each unit. You may make it do.
  • control apparatus 50 is comprised by the microcomputer etc., Based on the detection information in various detection means, and the instruction
  • each actuator including drive parts such as a throttle device that accompanies the drive of the refrigerant expansion heat transfer device 60
  • the pipe 5 that conducts the heat medium is composed of one that is connected to the heat exchanger related to heat medium 25a and one that is connected to the heat exchanger related to heat medium 25b.
  • the pipe 5 is branched (here, four branches each) according to the number of indoor units 3 connected to the relay unit 2.
  • the pipe 5 is connected by a heat medium flow switching flow rate adjusting device 40. By controlling the heat medium flow switching flow rate adjusting device 40, the heat medium from the heat exchanger related to heat medium 25a flows into the use side heat exchanger 35, or the heat medium from the heat exchanger related to heat medium 25b is used as the heat medium. Whether to flow into the use side heat exchanger 35 is determined.
  • the compressor 10 the first refrigerant flow switching device 11, the heat source side heat exchanger 12, the switching device 27, the switching device 29, the second refrigerant flow switching device 28, and heat exchange between heat media.
  • the refrigerant flow path, the refrigerant expansion heat medium transport device 60 (refrigerant expansion unit), and the accumulator 19 are connected by the refrigerant pipe 4 to constitute the refrigerant circuit A.
  • the heat medium flow path of the heat exchanger 25 between heat mediums, the refrigerant expansion heat medium transport device 60 (heat medium transport unit), the heat medium flow path switching flow rate adjustment device 40, and the use side heat exchanger 35 are connected to the piping.
  • the heat medium circulation circuit B is configured. That is, a plurality of use side heat exchangers 35 are connected in parallel to each of the heat exchangers 25 between heat mediums, 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 exchanger related to heat medium 25a and the heat exchanger related to heat medium 25b provided in the relay unit 2, and the relay unit 2 is connected.
  • the indoor unit 3 are also connected via the heat exchanger related to heat medium 25a and the heat exchanger related to heat medium 25b. That is, in the air conditioner 100, the heat source side refrigerant circulating in the refrigerant circuit A and the heat medium circulating in the heat medium circuit B exchange heat in the intermediate heat exchanger 25a and the intermediate heat exchanger 25b. It is like that.
  • the air conditioner 100 can realize an optimal cooling operation or heating operation according to the indoor load.
  • each operation mode executed by the air conditioner 100 will be described together with an example of the power of the refrigerant expansion heat medium transport device 60 in addition to the flow of the heat source side refrigerant and the heat medium.
  • 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 conditioning apparatus 100 can perform the same operation for all the indoor units 3 and can perform different operations for each of the indoor units 3.
  • the operation mode executed by the air conditioner 100 includes a heating only operation mode in which all the driven indoor units 3 execute the heating operation, and a cooling only operation in which all the driven indoor units 3 execute the cooling operation.
  • FIG. 3 is a refrigerant circuit diagram illustrating a refrigerant flow when the air-conditioning apparatus 100 is in the cooling only operation mode.
  • the cooling only operation mode will be described by taking as an example a case where a cooling load is generated in all of the use side heat exchangers 35a to 35d.
  • 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 first refrigerant flow switching device 11 is switched so that the heat source side refrigerant discharged from the compressor 10 flows into the heat source side heat exchanger 12.
  • the refrigerant expansion heat medium conveyance device 60a and the refrigerant expansion heat medium conveyance device 60b are driven to open the heat medium flow switching flow rate adjustment device 40a to the heat medium flow switching flow adjustment device 40d, A heat medium is circulated between each of the heat exchanger 25a and the heat exchanger 25b between the heat medium and the use side heat exchanger 35a to the use side heat exchanger 35d.
  • the second refrigerant flow switching device 28a and the second refrigerant flow switching device 28b are switched to the cooling side, the opening / closing device 27 is opened, and the opening / closing device 29 is closed.
  • 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 heat source side heat exchanger 12 via the first refrigerant flow switching device 11, and is the air in the outdoor space 6 (hereinafter referred to as outside air).
  • Heat exchange is performed to obtain a high-temperature / high-pressure liquid or two-phase refrigerant, and after passing through the check valve 13a, the refrigerant connection pipe 4a is conducted and flows out of the outdoor unit 1.
  • the high-temperature and 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 two-phase refrigerant that has flowed into the relay unit 2 passes through the opening / closing device 27, and is branched and expanded by the refrigerant expansion heat medium conveyance device 60a and the refrigerant expansion heat medium conveyance device 60b. ⁇ Low pressure two-phase refrigerant. These two-phase refrigerant flows into the heat exchanger related to heat medium 25a and the heat exchanger related to heat medium 25b, evaporates while absorbing heat from the heat medium circulating in the heat medium circuit B, and becomes a low-temperature gas refrigerant. .
  • the pipe 4 is conducted, passes through the check valve 13 c, and is sucked again into the compressor 10 through the first refrigerant flow switching device 11 and the accumulator 19.
  • the refrigerant expansion heat medium transport device 60 includes a value obtained by converting the pressure of the heat source side refrigerant flowing between the heat exchanger related to heat medium 25 and the refrigerant expansion heat medium transport device 60 into a saturation temperature, and a heat exchanger related to heat medium.
  • the opening degree is controlled so that the superheat (superheat degree) obtained as a difference from the temperature on the outlet side of 25 is constant.
  • the saturation temperature obtained by converting the temperature at the intermediate position may be used instead. In this case, it is not necessary to install a pressure sensor, and the system can be configured at low cost.
  • the heat of the heat medium is transmitted to the heat source side refrigerant in both the heat exchanger related to heat medium 25a and the heat exchanger related to heat medium 25b, and the cooled heat medium is transferred to the refrigerant expansion heat medium transport device 60a and The refrigerant expansion heat medium transport device 60b is pressurized and flows out, and the use side heat exchanger 35a to the use side heat exchanger are passed through the heat medium flow channel switching flow rate adjusting device 40a to the heat medium flow channel switching flow rate adjusting device 40d. Flows into 35d. The heat medium absorbs heat from the indoor air in the use side heat exchanger 35a to the use side heat exchanger 35d, thereby cooling the indoor space 7.
  • the expansion power obtained when the heat source side refrigerant flows into the refrigerant expansion heat medium transport device 60 is used.
  • the heat medium is pressurized and discharged.
  • the heat medium flows out of the use side heat exchanger 35a to the use side heat exchanger 35d and flows again into the heat medium flow path switching flow rate adjustment device 40a to the heat medium flow path switching flow rate adjustment device 40d.
  • the flow rate of the heat medium becomes a flow rate required to cover the air conditioning load required indoors by the flow rate adjusting action of the heat medium flow path switching flow rate adjusting device 40a to the heat medium flow path switching flow rate adjusting device 40d. It is controlled to flow into the use side heat exchanger 35a to the use side heat exchanger 35d.
  • the heat medium that has flowed out of the heat medium flow path switching flow rate adjusting device 40a to the heat medium flow path switching flow rate adjusting device 40d flows into the heat medium heat exchanger 25a and the heat medium heat exchanger 25b, and passes through the indoor unit 3 to the room.
  • the amount of heat absorbed from the space 7 is transferred to the refrigerant side and again sucked into the refrigerant expansion heat medium transfer device 60a and the refrigerant expansion heat medium transfer device 60b.
  • the heat medium flows in a direction from the heat medium flow switching flow rate adjusting device 40 to the refrigerant expansion heat medium conveying device 60.
  • the air conditioning load required in the indoor space 7 is the temperature detected by the temperature sensor 55a, or the temperature detected by the temperature sensor 55b and the temperature of the heat medium flowing out from the use side heat exchanger 35. This can be covered by controlling the difference to keep it at the target value.
  • the outlet temperature of the heat exchanger related to heat medium 25 the temperature of either the temperature sensor 55a or the temperature sensor 55b may be used, or the average temperature thereof may be used.
  • FIG. 4 is a conceptual diagram illustrating expansion energy that can be used in association with expansion of the heat source side refrigerant in the refrigerant circuit A in the air-conditioning apparatus 100.
  • FIG. 4 is a Ph diagram showing the pressure of the heat source side refrigerant and the enthalpy at that time
  • the arrows in FIG. 4 are images showing the movement of the heat source side refrigerant in each operation mode.
  • the high-temperature and high-pressure refrigerant pressure during the cooling only operation mode is given by Pc in the figure
  • the low-temperature and low-pressure refrigerant pressure during the cooling only operation mode is given by Pe in the figure.
  • the expansion power of the heat source side refrigerant can be calculated.
  • Pc 3 [Mpa]
  • Pe 1 [Mpa]
  • subcool SC 10 [deg]
  • refrigerant flow rate Gr 654 [kg / hr].
  • x refrigerant flow rate refrigerant expansion power.
  • the refrigerant expansion power in the above example is 0.78 [kW], and this refrigerant expansion power is used as the heat transfer power. It can be used.
  • the use side heat exchanger 35 is closed by closing the flow path with the heat medium flow path switching flow rate adjusting device 40. It suffices to prevent the heat medium from flowing.
  • the heat medium flows because all of the use side heat exchanger 35a to the use side heat exchanger 35d have a heat load, but when the heat load disappears, the corresponding heat medium flow switching flow rate The adjustment device 40 may be fully closed. Then, when a heat load is generated again, the corresponding heat medium flow switching flow rate adjusting device 40 may be opened to circulate the heat medium. The same applies to other operation modes described below.
  • the first refrigerant flow switching device 11 is connected to the relay unit without passing the heat source side refrigerant discharged from the compressor 10 through the heat source side heat exchanger 12. Switch to 2
  • the refrigerant expansion heat medium conveyance device 60a and the refrigerant expansion heat medium conveyance device 60b are driven to open the heat medium flow switching flow rate adjustment device 40a to the heat medium flow switching flow adjustment device 40d, A heat medium is circulated between each of the heat exchanger 25a and the heat exchanger 25b between the heat medium and the use side heat exchanger 35a to the use side heat exchanger 35d.
  • the second refrigerant flow switching device 28a and the second refrigerant flow switching device 28b are switched to the heating side, the open / close device 27 is closed, and the open / close 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, conducts through the refrigerant connection pipe 4 a, passes through the check valve 13 d, 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 is branched and passes through the second refrigerant flow switching device 28a and the second refrigerant flow switching device 28b, and the heat exchanger related to heat medium 25a and the heat between the heat media. It flows into each of the exchangers 25b.
  • the high-temperature and high-pressure gas refrigerant flowing into the heat exchanger related to heat medium 25a and the heat exchanger related to heat medium 25b is condensed and liquefied while dissipating heat to the heat medium circulating in the heat medium circuit B, and becomes a high-pressure liquid refrigerant.
  • the liquid refrigerant that has flowed out of the heat exchanger related to heat medium 25a and the heat exchanger related to heat medium 25b is expanded by the refrigerant expansion heat medium transfer device 60a and the refrigerant expansion heat medium transfer device 60b, and is a low-temperature, low-pressure two-phase refrigerant. It becomes.
  • the heat source side refrigerant flowing into the heat source side heat exchanger 12 absorbs heat from the outside air in the heat source side heat exchanger 12 and becomes a low-temperature / low-pressure gas refrigerant.
  • the low-temperature and low-pressure gas refrigerant flowing out from the heat source side heat exchanger 12 is again sucked into the compressor 10 via the first refrigerant flow switching device 11 and the accumulator 19.
  • the heat of the heat source side refrigerant is transmitted to the heat medium in both the heat exchanger related to heat medium 25a and the heat exchanger 25b, and the heated heat medium is transferred to the refrigerant expansion heat medium transfer device 60a and The inside of the pipe 5 is caused to flow by the refrigerant expansion heat medium transfer device 60b.
  • the heat medium pressurized and discharged by the refrigerant expansion heat medium transfer device 60a and the refrigerant expansion heat medium transfer device 60b is used via the heat medium flow switching flow rate adjustment device 40a to the heat medium flow switching flow adjustment device 40d. It flows into the side heat exchanger 35a to the use side heat exchanger 35d.
  • the indoor space 7 is heated by the heat medium radiating heat to the indoor air by the use side heat exchanger 35a to the use side heat exchanger 35d.
  • the heat medium flows out of the use side heat exchanger 35a to the use side heat exchanger 35d and flows into the heat medium flow switching flow rate adjusting device 40a to the heat medium flow switching flow adjusting device 40d.
  • 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 path switching flow rate adjusting device 40a to the heat medium flow path switching flow rate adjusting device 40d. It flows into the use side heat exchanger 35a to the use side heat exchanger 35d.
  • the heat medium that has flowed out of the heat medium flow path switching flow rate adjusting device 40a to the heat medium flow path switching flow rate adjusting device 40d flows into the heat medium heat exchanger 25a and the heat medium heat exchanger 25b, and passes through the indoor unit 3 to the room.
  • the amount of heat supplied to the space 7 is received from the refrigerant side and again sucked into the refrigerant expansion heat medium transfer device 60a and the refrigerant expansion heat medium transfer device 60b.
  • the expansion power obtained when the heat source side refrigerant flows into the refrigerant expansion heat medium transport device 60 is used.
  • the heat medium is pressurized and discharged.
  • the heat medium flows out of the use side heat exchanger 35a to the use side heat exchanger 35d and flows again into the heat medium flow path switching flow rate adjustment device 40a to the heat medium flow path switching flow rate adjustment device 40d.
  • the flow rate of the heat medium becomes a flow rate required to cover the air conditioning load required indoors by the flow rate adjusting action of the heat medium flow path switching flow rate adjusting device 40a to the heat medium flow path switching flow rate adjusting device 40d. It is controlled to flow into the use side heat exchanger 35a to the use side heat exchanger 35d.
  • the heat medium that has flowed out of the heat medium flow path switching flow rate adjusting device 40a to the heat medium flow path switching flow rate adjusting device 40d flows into the heat medium heat exchanger 25a and the heat medium heat exchanger 25b, and passes through the indoor unit 3 to the room.
  • the amount of heat supplied to the space 7 is received from the refrigerant side and again sucked into the refrigerant expansion heat medium transfer device 60a and the refrigerant expansion heat medium transfer device 60b.
  • the heat medium flows in a direction from the heat medium flow switching flow rate adjusting device 40 to the refrigerant expansion heat medium conveying device 60.
  • the air conditioning load required in the indoor space 7 is the temperature detected by the temperature sensor 55a, or the temperature detected by the temperature sensor 55b and the temperature of the heat medium flowing out from the use side heat exchanger 35. This can be covered by controlling the difference to keep it at the target value.
  • the outlet temperature of the heat exchanger related to heat medium 25 the temperature of either the temperature sensor 55a or the temperature sensor 55b may be used, or the average temperature thereof may be used.
  • the expansion power of the heat source side refrigerant can be calculated.
  • Pc 2.3 [Mpa]
  • Pe 0.65 [Mpa]
  • subcool SC 4 [deg]
  • refrigerant flow rate Gr 555 [kg / hr].
  • x refrigerant flow rate refrigerant expansion power
  • the refrigerant expansion power in the above example is 0.82 [kW]
  • this refrigerant expansion power is used as the heat transfer power. It can be used.
  • FIG. 6 is a refrigerant circuit diagram illustrating a refrigerant flow when the air-conditioning apparatus 100 is in the cooling / heating mixed operation mode.
  • FIG. 6 among the cooling and heating mixed operations in which the thermal load is generated in any one of the use side heat exchangers 35 and the cooling load is generated in the rest of the use side heat exchangers 35.
  • the heating main operation mode will be described.
  • the flow direction of the heat source side refrigerant is indicated by solid line arrows
  • the flow direction of the heat medium is indicated by broken line arrows.
  • the first refrigerant flow switching device 11 is connected to the relay unit without passing the heat source side refrigerant discharged from the compressor 10 through the heat source side heat exchanger 12. Switch to 2
  • the refrigerant expansion heat medium conveyance device 60a and the refrigerant expansion heat medium conveyance device 60b are driven to open the heat medium flow switching flow rate adjustment device 40a to the heat medium flow switching flow adjustment device 40d, Between the heat exchanger 25a and the use side heat exchanger 35 in which the cold load is generated, between the heat exchanger 25b between the heat medium 25b and the use side heat exchanger 35 in which the heat load is generated, respectively.
  • the heat medium is circulated.
  • 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 opening / closing device 27 is closed
  • the opening / closing device 29 is closed.
  • 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, conducts through the refrigerant connection pipe 4 a, passes through the check valve 13 d, 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 through the second refrigerant flow switching device 28b into the heat exchanger related to heat medium 25b that acts as a condenser.
  • the gas refrigerant flowing into the heat exchanger related to heat medium 25b is condensed and liquefied while dissipating heat to the heat medium circulating in the heat medium circuit B, and becomes liquid refrigerant.
  • the liquid refrigerant that has flowed out of the heat exchanger related to heat medium 25b is expanded by the refrigerant expansion heat medium transfer device 60b to become 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 refrigerant expansion heat medium transport device 60a.
  • the low-pressure two-phase refrigerant that has flowed into the heat exchanger related to heat medium 25a evaporates by absorbing heat from the heat medium circulating in the heat medium circuit B, thereby cooling the heat medium.
  • the low-pressure two-phase refrigerant flows out of the heat exchanger related to heat medium 25a, flows out of the relay unit 2 through the second refrigerant flow switching device 28a, and flows into the outdoor unit 1 again through the refrigerant pipe 4.
  • the low-temperature and low-pressure two-phase refrigerant that has flowed into the outdoor unit 1 flows into the heat source side heat exchanger 12 that acts as an evaporator through the check valve 13b.
  • coolant which flowed into the heat source side heat exchanger 12 absorbs heat from external air in the heat source side heat exchanger 12, and turns into a low temperature and low pressure gas refrigerant.
  • the low-temperature and low-pressure gas refrigerant flowing out from the heat source side heat exchanger 12 is again sucked into the compressor 10 via the first refrigerant flow switching device 11 and the accumulator 19.
  • the opening degree of the refrigerant expansion heat medium transport device 60b is controlled so that the subcooling (supercooling degree) of the outlet refrigerant of the heat exchanger related to heat medium 25b becomes the target value together with the refrigerant expansion heat medium transport device 60a. Is done. Alternatively, it is possible to adjust by providing a bypass circuit so that the subcooling is constant. It should be noted that the subcool control in which the refrigerant expansion heat medium transport device 60a and the refrigerant expansion heat medium transport device 60b are combined is only required to be able to recover expansion power by expansion of the refrigerant while keeping the subcool constant.
  • 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 pipe 5 by the refrigerant expansion heat medium transport device 60b.
  • the heat of the heat source side refrigerant is transmitted to the heat medium in the heat exchanger related to heat medium 25a, and the cooled heat medium is caused to flow in the pipe 5 by the refrigerant expansion heat medium transport device 60a. become.
  • the cooled heat medium that has been pressurized and flowed out by the refrigerant expansion heat medium transport device 60a flows into the use-side heat exchanger 35 where the cold load is generated via the heat medium flow switching flow rate adjustment device 40
  • the heat medium that has been pressurized and flowed out by the refrigerant expansion heat medium transfer device 60b flows into the use side heat exchanger 35 where the heat load is generated via the heat medium flow switching flow rate adjustment device 40.
  • the heat medium flow switching flow rate adjusting device 40 when the connected indoor unit 3 is in the heating operation mode, the heat exchanger related to heat medium 25b and the refrigerant expansion heat medium transport device 60b are connected.
  • the direction is switched to the direction in which the heat exchanger related to heat medium 25a and the refrigerant expansion heat medium transfer device 60a are connected. That is, the heat medium flow switching device 40 can switch the heat medium supplied to the indoor unit 3 between heating and cooling.
  • the heat medium that has been used for the cooling operation and has passed through the use-side heat exchanger 35 and whose temperature has risen slightly passes through the heat medium flow switching flow rate adjusting device 40 and flows into the heat exchanger related to heat medium 25a, and again becomes a refrigerant. It is sucked into the expanded heat medium transport device 60a.
  • the heat medium that has been used for the heating operation and has passed through the use-side heat exchanger 35 and has slightly decreased in temperature passes through the heat medium flow switching flow rate adjustment device 40 and flows into the heat exchanger related to heat medium 25b, and again becomes a refrigerant. It is sucked into the expansion heat medium transport device 60b.
  • the heat exchanger related to heat medium 25b and the refrigerant expansion heat medium transport device 60b are connected.
  • the direction is switched to the direction in which the heat exchanger related to heat medium 25a and the refrigerant expansion heat medium transfer device 60a are connected.
  • the warm heat medium and the cold heat medium are introduced into the use-side heat exchanger 35 having a heat load and a heat load, respectively, without being mixed by the action of the heat medium flow switching flow control device 40.
  • the heat medium used in the heating operation mode receives heat from the refrigerant as a heating application
  • the heat medium used in the cooling operation mode receives heat from the heat medium heat exchanger 25b.
  • the refrigerant is introduced into the heat exchanger related to heat medium 25a and exchanges heat with the refrigerant again, and is then transferred to the refrigerant expansion heat medium transfer device 60a and the refrigerant expansion heat medium transfer device 60b.
  • the air conditioning load required in the indoor space 7 is the difference between the temperature detected by the temperature sensor 55b on the heating side and the temperature of the heat medium flowing out from the use side heat exchanger 35 on the cooling side. This can be covered by controlling the difference between the temperature of the heat medium flowing out from the use side heat exchanger 35 and the temperature detected by the temperature sensor 55a as a target value.
  • a cooling load is generated in any of the use side heat exchangers 35, and the heating load is generated in the remaining of the use side heat exchangers 35.
  • the heat source side refrigerant flow in the refrigerant circuit A and the heat medium flow in the heat medium circuit B are the same as in the heating main operation mode.
  • the expansion power of the heat source side refrigerant can be calculated.
  • Pc 2.3 [Mpa]
  • Pe 1 [Mpa]
  • subcool SC 4 [deg]
  • refrigerant flow rate Gr 654 [kg / hr].
  • ⁇ refrigerant flow rate refrigerant expansion power
  • the refrigerant expansion power in the above example is 0.53 [kW]
  • this refrigerant expansion power is used as the heat transfer power. It can be used.
  • the second refrigerant flow switching device 28 is shown as a four-way valve, the present invention is not limited to this, and a plurality of two-way flow switching valves and three-way flow switching valves are used in the same manner. You may comprise so that a refrigerant
  • coolant may flow.
  • the heat medium for example, brine (antifreeze), water, a mixture of brine and water, a mixture of water and an additive having a high anticorrosive effect, or the like can be used. Therefore, in the air conditioning apparatus 100, even if the heat medium leaks into the indoor space 7 through the indoor unit 3, it contributes to the improvement of safety because a highly safe heat medium is used. Become.
  • the air conditioner 100 includes the accumulator 19
  • the heat source side heat exchanger 12 and the use side heat exchanger 35 are provided with a blower, and in many cases, condensation or evaporation is promoted by blowing air, but this is not a limitation.
  • the use side heat exchanger 35 can be a panel heater using radiation
  • the heat source side heat exchanger 12 is a water-cooled type that moves heat by water or antifreeze.
  • the case where there are four usage-side heat exchangers 35 has been described as an example, but the number is not particularly limited.
  • the case where the number of heat exchangers between heat mediums 25a and the heat exchangers between heat mediums 25b is two has been described as an example, naturally the present invention is not limited to this, so that the heat medium can be cooled or / and heated. If it comprises, you may install how many.
  • the refrigerant expansion heat medium transfer device 60a and the refrigerant expansion heat medium transfer device 60b are not limited to one each, and a plurality of small capacity refrigerant expansion heat medium transfer devices 60 may be connected in parallel.
  • the air-conditioning apparatus 100 not only improves the safety without circulating the heat source side refrigerant to the indoor unit 3 or the vicinity of the indoor unit 3, but also the heat source side refrigerant has a high pressure.
  • the power for transporting the heat medium that uses the expansion power generated when changing from low pressure to low pressure it leads to a reduction in operating power during cooling operation or heating operation, cooling main operation, and heating main operation
  • cost reduction and space saving can be achieved by reducing the number of parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

On décrit un climatiseur (100) qui, dans un circuit de circulation de fluide caloporteur (B), comprend un appareil de transfert de fluide caloporteur utilisant la détente de l'agent de refroidissement. L'appareil de transfert de fluide caloporteur utilise la puissance de détente d'un agent de refroidissement côté source thermique comme puissance de transfert d'un fluide caloporteur.
PCT/JP2013/082039 2013-11-28 2013-11-28 Climatiseur WO2015079531A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2013/082039 WO2015079531A1 (fr) 2013-11-28 2013-11-28 Climatiseur
JP2015550265A JPWO2015079531A1 (ja) 2013-11-28 2013-11-28 空気調和装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/082039 WO2015079531A1 (fr) 2013-11-28 2013-11-28 Climatiseur

Publications (1)

Publication Number Publication Date
WO2015079531A1 true WO2015079531A1 (fr) 2015-06-04

Family

ID=53198520

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/082039 WO2015079531A1 (fr) 2013-11-28 2013-11-28 Climatiseur

Country Status (2)

Country Link
JP (1) JPWO2015079531A1 (fr)
WO (1) WO2015079531A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002130770A (ja) * 2000-10-30 2002-05-09 Mitsubishi Electric Corp 冷凍サイクル装置およびその制御方法
JP2007132622A (ja) * 2005-11-11 2007-05-31 Daikin Ind Ltd ヒートポンプ給湯装置
JP2008241205A (ja) * 2007-03-28 2008-10-09 Toshiba Carrier Corp 空気調和機
WO2009098899A1 (fr) * 2008-02-06 2009-08-13 Daikin Industries, Ltd. Système de réfrigération
WO2012077166A1 (fr) * 2010-12-09 2012-06-14 三菱電機株式会社 Climatiseur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59166770A (ja) * 1983-03-11 1984-09-20 Matsushita Electric Ind Co Ltd 空調設備の三方切替流量制御弁

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002130770A (ja) * 2000-10-30 2002-05-09 Mitsubishi Electric Corp 冷凍サイクル装置およびその制御方法
JP2007132622A (ja) * 2005-11-11 2007-05-31 Daikin Ind Ltd ヒートポンプ給湯装置
JP2008241205A (ja) * 2007-03-28 2008-10-09 Toshiba Carrier Corp 空気調和機
WO2009098899A1 (fr) * 2008-02-06 2009-08-13 Daikin Industries, Ltd. Système de réfrigération
WO2012077166A1 (fr) * 2010-12-09 2012-06-14 三菱電機株式会社 Climatiseur

Also Published As

Publication number Publication date
JPWO2015079531A1 (ja) 2017-03-16

Similar Documents

Publication Publication Date Title
JP6095764B2 (ja) 空気調和装置
JP6385436B2 (ja) 空気調和装置
JP5752148B2 (ja) 空気調和装置
JP5784117B2 (ja) 空気調和装置
JP5855279B2 (ja) 空気調和装置
WO2011030430A1 (fr) Dispositif de conditionnement d'air
WO2014128961A1 (fr) Climatiseur
WO2012070083A1 (fr) Climatiseur
WO2015092896A1 (fr) Climatiseur et procédé de commande de climatiseur
JP5595521B2 (ja) ヒートポンプ装置
WO2011099054A1 (fr) Appareil de conditionnement d'air
JP5490245B2 (ja) 空気調和装置
WO2011030429A1 (fr) Dispositif de conditionnement d'air
WO2011030407A1 (fr) Dispositif de conditionnement d'air
WO2012172605A1 (fr) Climatiseur
JPWO2014083681A1 (ja) 空気調和装置
JP5972397B2 (ja) 空気調和装置、その設計方法
JP5955409B2 (ja) 空気調和装置
JP5752135B2 (ja) 空気調和装置
WO2011117922A1 (fr) Dispositif de climatisation
WO2015087421A1 (fr) Climatiseur
JP6062030B2 (ja) 空気調和装置
WO2015079531A1 (fr) Climatiseur
WO2011030420A1 (fr) Dispositif de conditionnement d'air

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13898384

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2015550265

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13898384

Country of ref document: EP

Kind code of ref document: A1