US20200400354A1 - Air-conditioning apparatus - Google Patents

Air-conditioning apparatus Download PDF

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Publication number
US20200400354A1
US20200400354A1 US16/975,835 US201816975835A US2020400354A1 US 20200400354 A1 US20200400354 A1 US 20200400354A1 US 201816975835 A US201816975835 A US 201816975835A US 2020400354 A1 US2020400354 A1 US 2020400354A1
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United States
Prior art keywords
header
air
condenser
heat transfer
evaporator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/975,835
Other languages
English (en)
Inventor
Yuta KOMIYA
Shinya Higashiiue
Masahiro Yokoi
Yuichi USUDA
Satoshi Ueda
Noriyuki Tani
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Filing date
Publication date
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Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TANI, NORIYUKI, UEDA, SATOSHI, YOKOI, MASAHIRO, KOMIYA, Yuta, USUDA, YUICHI, HIGASHIIUE, SHINYA
Publication of US20200400354A1 publication Critical patent/US20200400354A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0233—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels
    • F28D1/024—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels with an air driving element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/022—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F24F2013/225—Means for preventing condensation or evacuating condensate for evacuating condensate by evaporating the condensate in the cooling medium, e.g. in air flow from the condenser
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/041—Details of condensers of evaporative condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F2009/0285—Other particular headers or end plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F25/00—Component parts of trickle coolers
    • F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
    • F28F25/06—Spray nozzles or spray pipes

Definitions

  • the present disclosure relates to an air-conditioning apparatus that has an evaporator and a condenser inside a housing.
  • a unitary cooling apparatus in which an evaporator and a condenser are disposed on the same plane and the evaporator is located higher than the condenser (see, for example, Patent Literature 1).
  • the evaporator and the condenser are each made of a spine fin tube.
  • the spine fin tube is made by fixing multiple rectangular spine fins to the outer periphery of a circular tube that is circular in cross section.
  • Patent Literature 1 Japanese Unexamined Patent Application Publication No. 8-61699
  • the present disclosure has been made to solve the above problem and aims to provide an air-conditioning apparatus with which it is possible to increase the amount of condensed water to evaporate at a condenser.
  • An air-conditioning apparatus includes a housing having a first air path through which indoor air passes and a second air path through which outdoor air passes; an evaporator disposed in the first air path and configured to exchange heat between the indoor air and refrigerant; a condenser disposed in the second air path and configured to exchange heat between the outdoor air and the refrigerant; and a water sprinkler configured to sprinkle condensed water to the condenser, the condensed water being generated at the evaporator.
  • the condenser includes a first heat transfer tube and a second heat transfer tube that are arranged parallel to each other, and a fin arranged between the first heat transfer tube and the second heat transfer tube.
  • the condenser includes the first heat transfer tube and the second heat transfer tube that are arranged parallel to each other, and the fin arranged between the first heat transfer tube and the second heat transfer tube.
  • FIG. 1 schematically illustrates a configuration of an air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a perspective view of a condenser of the air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • FIG. 3 is a front view of a part of the condenser of the air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • FIG. 4 schematically illustrates a variation of the configuration of the air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • FIG. 5 is a perspective view of a condenser of an air-conditioning apparatus according to Embodiment 2 of the present disclosure.
  • FIG. 6 is a top view of the condenser of the air-conditioning apparatus according to Embodiment 2 of the present disclosure.
  • FIG. 7 is a perspective view of a condenser of an air-conditioning apparatus according to Embodiment 3 of the present disclosure.
  • FIG. 8 is a perspective view of a variation of the condenser of the air-conditioning apparatus according to Embodiment 3 of the present disclosure.
  • FIG. 9 is a perspective view of a condenser of an air-conditioning apparatus according to Embodiment 4 of the present disclosure.
  • FIG. 10 is a vertical cross-sectional view of the condenser of the air-conditioning apparatus according to Embodiment 4 of the present disclosure.
  • FIG. 11 schematically illustrates a configuration of an air-conditioning apparatus according to Embodiment 5 of the present disclosure.
  • FIG. 12 schematically illustrates a variation of the configuration of the air-conditioning apparatus according to Embodiment 5 of the present disclosure.
  • FIG. 1 schematically illustrates a configuration of an air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • an air-conditioning apparatus 1 includes a housing 90 .
  • the housing 90 has an indoor air inlet 91 , an indoor air outlet 92 , an outdoor air inlet 93 , and an outdoor air outlet 94 .
  • the indoor air inlet 91 is an opening for suctioning indoor air A into the housing 90 from inside the room.
  • the indoor air outlet 92 is an opening for blowing the indoor air A into the room.
  • the outdoor air inlet 93 is an opening for suctioning outdoor air B into the housing 90 from outside the room.
  • the outdoor air outlet 94 is an opening for blowing the outdoor air B to outside the room.
  • a separation plate 95 separates the housing 90 into two spaces, in which a first air path 90 a and a second air path 90 b are formed.
  • the indoor air A passes through the first air path 90 a
  • the outdoor air B passes through the second air path 90 b . That is, the separation plate 95 separates the housing 90 into the space that communicates with the indoor air inlet 91 and the indoor air outlet 92 and the space that communicates with the outdoor air inlet 93 and the outdoor air outlet 94 .
  • the air-conditioning apparatus 1 includes a refrigerant circuit 10 .
  • the refrigerant circuit 10 includes a compressor 20 , an expansion valve 30 , an evaporator 40 , and a condenser 50 .
  • the compressor 20 , the condenser 50 , the expansion valve 30 , and the evaporator 40 are connected to each other in sequence via refrigerant pipes 60 to form an annulus, which enables refrigerant to circulate.
  • the refrigerant pipes 60 are made of, for example, aluminum.
  • the evaporator 40 is disposed in the first air path 90 a inside the housing 90 .
  • the evaporator 40 exchanges heat between the indoor air A and the refrigerant.
  • the evaporator 40 includes heat transfer tubes 41 and fins 42 connected to the heat transfer tubes 41 .
  • the refrigerant flows through the heat transfer tubes 41 .
  • FIG. 1 includes a side view of the evaporator 40 .
  • the heat transfer tubes 41 correspond to evaporator-side heat transfer tubes
  • the fins 42 correspond to evaporator-side fins.
  • each of the heat transfer tubes 41 has a refrigerant path.
  • the heat transfer tubes 41 are, for example, circular tubes that are circular in a cross section perpendicular to the axis of the refrigerant path. It should be noted that the heat transfer tubes 41 are not limited to circular tubes and may be flat tubes that are flat in a cross section perpendicular to the axis of the refrigerant path.
  • the fins 42 are, for example, plate fins. It should be noted that the fins 42 are not limited to plate fins and may be corrugated fins.
  • the heat transfer tubes 41 and the fins 42 , which form the evaporator 40 are made of aluminum.
  • An indoor-air-sending device 70 is disposed in the first air path 90 a .
  • the indoor-air-sending device 70 suctions the indoor air A through the indoor air inlet 91 and blows the indoor air A into the room through the indoor air outlet 92 .
  • the indoor-air-sending device 70 is, for example, a propeller fan. It should be noted that the indoor-air-sending device 70 is not limited to a propeller fan and may be, for example, a cross-flow fan.
  • an indoor-side drain pan 110 is disposed below the evaporator 40 and stores condensed water C generated at the evaporator 40 .
  • the condenser 50 is disposed in the second air path 90 b .
  • the condenser 50 exchanges heat between the outdoor air B and the refrigerant.
  • the configuration of the condenser 50 is described later.
  • An outdoor-air-sending device 80 is disposed in the second air path 90 b .
  • the outdoor-air-sending device 80 suctions the outdoor air B through the outdoor air inlet 93 and blows the outdoor air B to outside the room through the outdoor air outlet 94 .
  • the outdoor-air-sending device 80 is, for example, a sirocco fan. It should be noted that the outdoor-air-sending device 80 is not limited to a sirocco fan and may be, for example, a propeller fan.
  • the first air path 90 a and the second air path 90 b in the housing 90 are adjacent to each other in the horizontal direction inside the housing 90 . That is, the evaporator 40 and the condenser 50 are apart from each other in the horizontal direction inside the housing 90 .
  • the compressor 20 is disposed in the second air path 90 b .
  • the expansion valve 30 is disposed in the first air path 90 a . It should be noted that the compressor 20 may be disposed in the second air path 90 b .
  • the expansion valve 30 may be disposed in the second air path 90 b.
  • the inside of the housing 90 accommodates the compressor 20 , the expansion valve 30 , the evaporator 40 , and the condenser 50 .
  • the housing 90 has the first air path 90 a , through which the indoor air A passes, and the second air path 90 b , through which the outdoor air B passes. That is, the air-conditioning apparatus 1 is a unitary air-conditioning apparatus.
  • the air-conditioning apparatus 1 includes a water sprinkler 100 .
  • the water sprinkler 100 includes a water pump 101 , a water pipe 102 , and a water-sprinkling portion 103 .
  • the water-sprinkling portion 103 is disposed above the condenser 50 inside the housing 90 .
  • the water pump 101 is disposed in the indoor-side drain pan 110 .
  • the water pipe 102 connects the water pump 101 and the water-sprinkling portion 103 to each other.
  • the water pump 101 suctions the condensed water C stored in the indoor-side drain pan 110 .
  • the water pipe 102 allows the suctioned condensed water C to flow to the water-sprinkling portion 103 .
  • the water-sprinkling portion 103 sprinkles the condensed water C onto the condenser 50 . That is, the water sprinkler 100 sprinkles the condensed water C generated at the evaporator 40 onto the condenser 50 .
  • FIG. 2 is a perspective view of the condenser of the air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • the z-direction corresponds to the vertical direction.
  • the x-direction is the direction in which the outdoor air B passes through the condenser 50 .
  • the y-direction is the direction perpendicular to the z-direction and the y-direction.
  • the x-direction and the y-direction are parallel to a horizontal plane.
  • the condenser 50 includes heat transfer tubes 51 , fins 52 , a first header 53 , and a second header 54 .
  • the heat transfer tubes 51 are arranged parallel to each other and are arranged between the first header 53 and the second header 54 .
  • the heat transfer tubes 51 are disposed in such a manner that, for example, the longitudinal direction of the heat transfer tubes 51 is identical to the vertical direction.
  • the inside of each of the heat transfer tubes 51 has a refrigerant path.
  • the heat transfer tubes 51 are flat tubes that are flat in a cross section perpendicular to the axis of the refrigerant path.
  • the heat transfer tubes 51 are disposed in such a manner that the long axis of the flat cross section is in the direction in which the outdoor air B flows.
  • the first header 53 and the second header 54 are arranged parallel to each other.
  • the first header 53 and the second header 54 are disposed in such a manner that, for example, the longitudinal direction of the first header 53 and the second header 54 is identical to the horizontal direction.
  • the first header 53 is located higher than the second header 54 .
  • the first header 53 is connected to one end portion of each of the heat transfer tubes 51 .
  • the water sprinkler 100 sprinkles the condensed water C onto the top of the first header 53 .
  • the second header 54 is connected to the other end portion of each of the heat transfer tubes 51 .
  • the refrigerant that has flowed into the first header 53 diverges into streams, and the refrigerant streams then flow into the refrigerant paths of the heat transfer tubes 51 .
  • the refrigerant streams are mixed in the second header 54 , and confluent refrigerant flows out from the second header 54 .
  • Each of the fins 52 is disposed between the heat transfer tubes 51 .
  • the fins 52 are, for example, corrugated fins.
  • FIG. 3 is a front view of a part of the condenser of the air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • the heat transfer tubes 51 include a first heat transfer tube 51 - 1 and a second heat transfer tube 51 - 2 .
  • the first heat transfer tube 51 - 1 and the second heat transfer tube 51 - 2 are arranged adjacent and parallel to each other.
  • the fin 52 is disposed between the first heat transfer tube 51 - 1 and the second heat transfer tube 51 - 2 .
  • the first header 53 , the second header 54 , the heat transfer tubes 51 , and the fins 52 , which form the condenser 50 , are made of aluminum.
  • the compressor 20 suctions low-temperature, low-pressure refrigerant and discharges high-temperature, high-pressure refrigerant.
  • the high-temperature, high-pressure refrigerant discharged from the compressor 20 flows into the condenser 50 .
  • the refrigerant that has flowed into the condenser 50 exchanges heat with the outdoor air B sent from the outdoor-air-sending device 80 and rejects heat.
  • the temperature of the refrigerant decreases, and the refrigerant becomes liquid-state refrigerant, which then flows out from the condenser 50 .
  • the expansion valve 30 reduces the pressure of the refrigerant that has flowed out from the condenser 50 .
  • the refrigerant becomes two-phase gas-liquid refrigerant, which then flows into the evaporator 40 .
  • the refrigerant that has flowed into the evaporator 40 exchanges heat with the indoor air A sent from the indoor-air-sending device 70 .
  • the refrigerant receives heat, evaporates, and becomes gas-state refrigerant, which then flows out from the evaporator 40 .
  • the compressor 20 suctions the refrigerant that has flowed out from the evaporator 40 .
  • the water sprinkler 100 When the indoor air A passes through the evaporator 40 , moisture contained in the indoor air A condenses into the condensed water C.
  • the condensed water C generated at the evaporator 40 is stored in the indoor-side drain pan 110 disposed below the evaporator 40 .
  • the water pump 101 suctions the condensed water C stored in the indoor-side drain pan 110 .
  • the water pipe 102 allows the suctioned condensed water C to flow to the water-sprinkling portion 103 .
  • the water-sprinkling portion 103 sprinkles the condensed water C onto the condenser 50 .
  • the water sprinkler 100 sprinkles the condensed water C onto the top of the first header 53 .
  • the water sprinkler 100 may include, for example, a water-level sensor for detecting the level of the condensed water C stored in the indoor-side drain pan 110 . When the level of the condensed water C exceeds a predetermined level, the water pump 101 may be caused to operate.
  • the condensed water C sprinkled on the top of the first header 53 flows out from the edges of the first header 53 and flows down along the surfaces of the heat transfer tubes 51 and the fins 52 . That is, the condensed water C flows in the negative z-direction in FIGS. 2 and 3 . After flowing out from the first header 53 to the fins 52 , the condensed water C flows down along the surfaces of the fins 52 .
  • the condensed water C that has flowed out from the first header 53 to the fins 52 flows down, following the curves of the fins 52 , which are corrugated fins. That is, the length of the route that the condensed water C flows along the surface of each of the fins 52 is more than the distance between the first header 53 and the second header 54 .
  • the condensed water C When flowing down along the surfaces of the heat transfer tubes 51 and the fins 52 , the condensed water C is heated by the refrigerant in the heat transfer tubes 51 and thus evaporates into vapor.
  • the vapor, together with the outdoor air B, passes through the second air path 90 b and flows to outside the room through the outdoor air outlet 94 .
  • the air-conditioning apparatus 1 includes the evaporator 40 , the condenser 50 , and the water sprinkler 100 .
  • the evaporator 40 exchanges heat between the indoor air A and the refrigerant.
  • the condenser 50 exchanges heat between the outdoor air B and the refrigerant.
  • the water sprinkler 100 sprinkles the condensed water C generated at the evaporator 40 onto the condenser 50 .
  • the condenser 50 includes the first header 53 , the second header 54 , the heat transfer tubes 51 , and the fins 52 .
  • the first header 53 and the second header 54 are arranged parallel to each other.
  • the heat transfer tubes 51 are arranged parallel to each other and are arranged between the first header 53 and the second header 54 .
  • the fins 52 are disposed between the heat transfer tubes 51 .
  • the condensed water C sprinkled from the water sprinkler 100 onto the condenser 50 is easily retained on the surfaces of the fins 52 disposed between the heat transfer tubes 51 .
  • the air-conditioning apparatus 1 includes the water sprinkler 100 .
  • the air-conditioning apparatus 1 can sprinkle the condensed water C generated at the evaporator 40 onto the condenser 50 .
  • the first header 53 and the second header 54 extend in the horizontal direction, and the first header 53 is located higher than the second header 54 .
  • the water sprinkler 100 is configured to sprinkle the condensed water C onto the top of the first header 53 .
  • the condensed water C sprinkled on the top of the first header 53 flows down to the second header 54 along the surfaces of the heat transfer tubes 51 and the fins 52 . That is, the condensed water C flows along the entire surface of the condenser 50 , which makes it possible to increase the amount of the condensed water C to evaporate at the condenser 50 .
  • the fins 52 are corrugated fins.
  • the condensed water C that has flowed out from the first header 53 to the fins 52 flows down, following the curves of the fins 52 , which are corrugated fins. That is, the length of the route that the condensed water C flows along the surface of each of the fins 52 is more than the distance between the first header 53 and the second header 54 .
  • the duration for which the condensed water C receives heat from the fins 52 is longer, which facilitates evaporation of the condensed water C. Accordingly, it is possible to increase the amount of the condensed water C to evaporate at the condenser 50 .
  • the first header 53 , the second header 54 , the heat transfer tubes 51 , and the fins 52 , which form the condenser 50 are made of aluminum.
  • the heat transfer tubes 41 and the fins 42 , which form the evaporator 40 are made of aluminum.
  • the evaporator 40 is copper or iron, it is possible to lighten the evaporator 40 .
  • the evaporator 40 is made of copper or iron, it is possible to more effectively prevent ions of a metal nobler than aluminum, such as copper ions, from dissolving into the condensed water C generated at the evaporator 40 .
  • ions of a metal nobler than aluminum such as copper ions
  • the refrigerant pipes 60 are made of aluminum.
  • the refrigerant pipes 60 are made of copper or iron, it is possible to lighten the evaporator 40 .
  • the evaporator 40 , the condenser 50 , and the refrigerant pipes 60 are made of aluminum, dissimilar metal welding is not necessary in the manufacturing of the refrigerant circuit 10 , which enables manufacturability of the refrigerant circuit 10 to be improved.
  • the condenser 50 includes the heat transfer tubes 51 arranged parallel to each other and arranged between the first header 53 and the second header 54 .
  • the configuration of the condenser in the present disclosure is not limited to the illustrated configuration.
  • the condenser 50 may include, for example, circular tubes that are circular in a cross section perpendicular to the axis of a refrigerant path.
  • the fins 52 are not limited to corrugated fins and may be plate fins.
  • the water sprinkler 100 includes the water pump 101 , the water pipe 102 , and the water-sprinkling portion 103 .
  • the configuration of the water sprinkler 100 is not limited to the illustrated configuration. Any configuration is applicable as long as the water sprinkler 100 can sprinkle the condensed water C generated at the evaporator 40 onto the condenser 50 .
  • FIG. 4 schematically illustrates a variation of the configuration of the air-conditioning apparatus according to Embodiment 1 of the present disclosure.
  • an outdoor-side drain pan 120 is disposed below the condenser 50 inside the housing 90 .
  • a water pipe 121 connects the indoor-side drain pan 110 and the outdoor-side drain pan 120 to each other.
  • the water pipe 121 allows the condensed water C stored in the indoor-side drain pan 110 to flow to the outdoor-side drain pan 120 .
  • the outdoor-side drain pan 120 stores the condensed water C generated at the evaporator 40 .
  • a water sprinkler 130 is disposed in the outdoor-side drain pan 120 .
  • the water sprinkler 130 is discoid, and the outer periphery of the water sprinkler 130 has blades for retaining the condensed water C.
  • the water sprinkler 130 is driven by a driving unit such as a motor and rotates, which enables the blades on the outer periphery to splash and sprinkle the condensed water C stored in the outdoor-side drain pan 120 to a side face of the condenser 50 .
  • the condensed water C sprinkled from the water sprinkler 130 to the condenser 50 is retained on the fins 52 , which makes it possible to increase the amount of the condensed water C to evaporate at the condenser 50 .
  • the water sprinkler 130 may be disposed upstream of the condenser 50 in the second air path 90 b . This enables the condensed water C sprinkled by the water sprinkler 130 to flow with the outdoor air B, which ensures that the condensed water C adheres to the condenser 50 .
  • Embodiment 2 a configuration of an air-conditioning apparatus 1 in Embodiment 2 is described, focusing on differences from Embodiment 1. It should be noted that the same reference sign is assigned to an element identical to that described in Embodiment 1, and explanations for common elements are omitted.
  • FIG. 5 is a perspective view of a condenser of an air-conditioning apparatus according to Embodiment 2 of the present disclosure.
  • FIG. 6 is a top view of the condenser of the air-conditioning apparatus according to Embodiment 2 of the present disclosure.
  • a condenser 50 includes fins 52 a each disposed between heat transfer tubes 51 .
  • the fins 52 a are, for example, corrugated fins.
  • a water sprinkler 100 sprinkles condensed water C onto the top of a first header 53 .
  • each of the fins 52 a protrude from the edges of the first header 53 . That is, as illustrated in FIG. 6 , the length of each of the fins 52 a in the x-direction is more than the length of the first header 53 in the x-direction.
  • both end portions of each of the fins 52 a protrude from the edges of the first header 53 .
  • the configuration of the condenser 50 is not limited to the illustrated configuration.
  • One of the end portions of each of the fins 52 a may protrude from the edge of the first header 53 .
  • Embodiment 2 when the condenser 50 is viewed from above, the end portions of each of the fins 52 protrude from the edges of the first header 53 .
  • Embodiment 3 a configuration of an air-conditioning apparatus 1 in Embodiment 3 is described, focusing on differences from Embodiments 1 and 2. It should be noted that the same reference sign is assigned to an element identical to that described in Embodiments 1 and 2, and explanations for common elements are omitted.
  • FIG. 7 is a perspective view of a condenser of an air-conditioning apparatus according to Embodiment 3 of the present disclosure.
  • the top of a first header 53 a of a condenser 50 is a curved surface that protrudes upward from a horizontal plane. Specifically, regarding the protruded curved top of the first header 53 a , in the direction in which outdoor air B flows, a center portion of the top protrudes upward, and end portions of the top are inclined downward. With such a configuration, condensed water C sprinkled on the top of the first header 53 a flows down along the curved surface.
  • both end portions of the top of the first header 53 a are inclined downward toward both edges of the top.
  • the shape of the top is not limited to the illustrated shape.
  • the top of the first header 53 a may be a curved surface having edges, one of which is inclined downward toward the other edge.
  • the top of the first header 53 a is a curved surface that protrudes upward from a horizontal plane.
  • the condensed water C is less likely to be retained on the top of the first header 53 a .
  • the condensed water C sprinkled from the water sprinkler 100 onto the condenser 50 more easily reaches the fins 52 .
  • FIG. 8 is a perspective view of a variation of the condenser of the air-conditioning apparatus according to Embodiment 3 of the present disclosure.
  • the top of a first header 53 b of the condenser 50 is made of slopes and inclined to a horizontal plane. Specifically, in the direction in which the outdoor air B flows, the top of the first header 53 b is inclined downward from the center, which is the apex of the top, toward both edges of the top. Hence, the top is made of the slopes. With such a shape of the top, the condensed water C sprinkled on the top of the first header 53 b flows down along the slopes.
  • the top of the first header 53 b is inclined downward from the center toward both edges.
  • the shape of the top is not limited to the illustrated shape.
  • the top of the first header 53 b may be a slope, that is, a surface with one edge higher than the other edge.
  • the condensed water C is less likely to be retained on the top of the first header 53 b .
  • the condensed water C sprinkled from the water sprinkler 100 onto the condenser 50 more easily reaches the fins 52 .
  • Embodiment 4 a configuration of an air-conditioning apparatus 1 in Embodiment 4 is described, focusing on differences from Embodiments 1 to 3. It should be noted that the same reference sign is assigned to an element identical to that described in Embodiments 1 to 3, and explanations for common elements are omitted.
  • FIG. 9 is a perspective view of a condenser of an air-conditioning apparatus according to Embodiment 4 of the present disclosure.
  • FIG. 10 is a vertical cross-sectional view of the condenser of the air-conditioning apparatus according to Embodiment 4 of the present disclosure. It should be noted that FIG. 10 illustrates a cross section of a condenser 50 cut along the xy-plane.
  • a second header 54 a of the condenser 50 has a water-storage portion 56 that is a depression in the top of the second header 54 a .
  • a frame portion 55 protrudes upward from the top of the second header 54 a , and the water-storage portion 56 is formed in the inside portion surrounded by the frame portion 55 .
  • a water sprinkler 100 sprinkles condensed water C onto the top of a first header 53 .
  • the condensed water C sprinkled on the top of the first header 53 flows out from the edges of the first header 53 and flows down along the surfaces of the heat transfer tubes 51 and fins 52 .
  • the condensed water C is heated by refrigerant in the heat transfer tubes 51 and evaporates into vapor.
  • the condensed water C is stored in the water-storage portion 56 formed in the top of the second header 54 a .
  • the condensed water C stored in the water-storage portion 56 is heated by refrigerant in the second header 54 a and evaporates into vapor.
  • the vapor, together with the outdoor air B, passes through a second air path 90 b and flows to outside a room through an outdoor air outlet 94 .
  • the second header 54 a has the water-storage portion 56 , which is a depression in the top of the second header 54 a.
  • the condensed water C stored in the water-storage portion 56 is heated by the refrigerant in the second header 54 a to accelerate evaporation of the condensed water C.
  • Embodiment 5 a configuration of an air-conditioning apparatus 1 in Embodiment 5 is described, focusing on differences from Embodiments 1 to 4. It should be noted that the same reference sign is assigned to an element identical to that described in Embodiments 1 to 4, and explanations for common elements are omitted.
  • FIG. 11 schematically illustrates a configuration of an air-conditioning apparatus according to Embodiment 5 of the present disclosure.
  • the air-conditioning apparatus 1 includes an ion-exchange resin 140 .
  • the ion-exchange resin 140 is configured to remove a metal that is nobler than aluminum and is contained in condensed water C generated at an evaporator 40 .
  • the ion-exchange resin 140 exchanges a pre-absorbed ion for a target substance to absorb the target substance.
  • the ion-exchange resin 140 absorbs copper ions contained in the condensed water C and removes the copper ions from the condensed water C.
  • the ion-exchange resin 140 is disposed inside a water pipe 102 .
  • the ion-exchange resin 140 removes a metal nobler than aluminum from the condensed water C that passes through the water pipe 102 .
  • the position of the ion-exchange resin 140 is not limited to the illustrated position, and the ion-exchange resin 140 may be disposed in an indoor-side drain pan 110 , a water pump 101 , or a water-sprinkling portion 103 .
  • the air-conditioning apparatus 1 includes the ion-exchange resin 140 for removing a metal that is nobler than aluminum and is contained in the condensed water C generated at the evaporator 40 .
  • the ion-exchange resin 140 can remove ions of a metal nobler than aluminum, which makes it possible to decrease the amount of ions of the metal, which is nobler than aluminum, contained in the condensed water C. Accordingly, even when heat transfer tubes 41 and fins 42 of the condenser 50 are made of aluminum, it is possible to prevent galvanic corrosion in the condenser 50 .
  • the configuration of the water sprinkler 100 is not limited to the configuration illustrated in FIG. 11 . Any configuration is applicable as long as the water sprinkler 100 can sprinkle the condensed water C generated at the evaporator 40 onto the condenser 50 . Moreover, changes can be made to the ion-exchange resin 140 as long as the ion-exchange resin 140 can remove a metal that is nobler than aluminum and is contained in the condensed water C, before the water sprinkler 100 sprinkles the condensed water C on the condenser 50 .
  • FIG. 12 schematically illustrates a variation of the configuration of the air-conditioning apparatus according to Embodiment 5 of the present disclosure.
  • the ion-exchange resin 140 is added to the variation ( FIG. 4 ) of the configuration of the air-conditioning apparatus 1 described in Embodiment 1.
  • the ion-exchange resin 140 is disposed in an outdoor-side drain pan 120 .
  • the ion-exchange resin 140 removes a metal nobler than aluminum from the condensed water C stored in the outdoor-side drain pan 120 .
  • the position of the ion-exchange resin 140 is not limited to the illustrated position, and the ion-exchange resin 140 may be disposed in the indoor-side drain pan 110 , a water pipe 121 , or a water sprinkler 130 .
  • the condenser 50 includes the first header 53 and the second header 54 .
  • the configuration of the condenser in the present disclosure is not limited to the illustrated configuration.
  • the condenser 50 may be, for example, a serpentine heat exchanger made by bending a heat transfer tube into a serpentine tube.
  • Embodiments 1 to 5 the air-conditioning apparatus 1 that performs a cooling operation to cool the indoor air A is described. However, the operation of the air-conditioning apparatus in the present disclosure is not limited to the cooling operation.
  • the air-conditioning apparatus 1 may perform a dehumidifying operation to remove moisture contained in the indoor air A.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
US16/975,835 2018-04-11 2018-04-11 Air-conditioning apparatus Abandoned US20200400354A1 (en)

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PCT/JP2018/015224 WO2019198174A1 (ja) 2018-04-11 2018-04-11 空気調和装置

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EP3779318A4 (de) 2021-03-31
EP3779318A1 (de) 2021-02-17
WO2019198174A1 (ja) 2019-10-17
CN111919072A (zh) 2020-11-10
JP6972314B2 (ja) 2021-11-24
JPWO2019198174A1 (ja) 2021-02-12

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