EP3128263B1 - Heat exchanger and air conditioner - Google Patents
Heat exchanger and air conditioner Download PDFInfo
- Publication number
- EP3128263B1 EP3128263B1 EP15757924.4A EP15757924A EP3128263B1 EP 3128263 B1 EP3128263 B1 EP 3128263B1 EP 15757924 A EP15757924 A EP 15757924A EP 3128263 B1 EP3128263 B1 EP 3128263B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipes
- primary
- heat exchange
- pipe
- refrigerant
- 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.)
- Active
Links
- 239000003507 refrigerant Substances 0.000 claims description 126
- 239000007788 liquid Substances 0.000 claims description 35
- 230000005484 gravity Effects 0.000 claims description 24
- 238000004378 air conditioning Methods 0.000 claims description 23
- 239000011555 saturated liquid Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000010696 ester oil Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
-
- 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
- F25B39/02—Evaporators
-
- 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
- F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
- F28D1/0461—Combination of different types of heat exchanger, e.g. radiator combined with tube-and-shell heat exchanger; Arrangement of conduits for heat exchange between at least two media and for heat exchange between at least one medium and the large body of fluid
-
- 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
- F28D1/047—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 bent, e.g. in a serpentine or zig-zag
- F28D1/0475—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 bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
-
- 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
- F28D1/047—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 bent, e.g. in a serpentine or zig-zag
- F28D1/0477—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 bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
-
- 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
- F28F2215/00—Fins
- F28F2215/02—Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/10—Particular pattern of flow of the heat exchange media
- F28F2250/102—Particular pattern of flow of the heat exchange media with change of flow direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/10—Particular pattern of flow of the heat exchange media
- F28F2250/108—Particular pattern of flow of the heat exchange media with combined cross flow and parallel flow
-
- 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
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
- F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
Definitions
- the present invention relates to a heat exchanger and an air-conditioning apparatus including the heat exchanger.
- a finned tube heat exchanger is presented as a heat exchanger for use in an air-conditioning apparatus or another related apparatus.
- tubes through which refrigerant flows are inserted into plate-shaped fins spaced apart from one another.
- Patent Literature 1 discloses a heat exchanger in which a first header collecting pipe is connected to one end of each of flat pipes, a second header collecting pipe is connected to the other end of each of the flat pipes, and fins are provided between the first header collecting pipe and the second header collecting pipe.
- the heat exchanger in Patent Literature 1 is separated into an upper heat exchange region and a lower heat exchange region, and the upper heat exchange region and the lower heat exchange region are separated in the direction of gravity.
- the conventional technique aims to improve heat exchange efficiency by reducing heat loss due to heat exchange between gas state refrigerant and saturated liquid state refrigerant.
- Patent Literature 2 discloses a heat exchanger separated into an upper heat exchange region (main heat exchange portion) and a lower heat exchange region (auxiliary heat exchange portion). Patent Literature 2 aims to improve the condensing capacity and evaporating capacity of the heat exchanger by optimizing the degree of subcooling of refrigerant and the heating surface area of a flat pipe.
- EP 1 031 801 A2 discloses a heat exchanger comprising a primary and a secondary heat exchange portion for evaporating or condensing refrigerant in a reversible heat pump cycle. Both portions of this heat exchanger comprise fins, which are adapted to be provided parallel to the direction of an air stream.
- the present invention provides a heat exchange system in which heat exchange performance can be improved and an air-conditioning apparatus including the heat exchange system.
- a heat exchange system according to an embodiment of the present invention is set forth in claim 1.
- the primary-pipe connecting component and the secondary-pipe connecting component extend in the directions parallel to the direction in which air is sent.
- the heat exchanger acts as either a condenser or an evaporator
- a direction in which the refrigerant flows through the primary-pipe connecting component or the secondary-pipe connecting component is opposite to the direction in which air is sent. Consequently, heat exchange performance can be improved.
- Fig. 1 is a front view of a heat exchanger 1 according to Embodiment 1. The following describes the heat exchanger 1 with reference to Fig. 1 .
- the heat exchanger 1 includes a fin portion 10, primary pipes 20, hairpin pipes 23, a header 30, secondary pipes 40, and connecting components (secondary-pipe connecting components) 50.
- plate-shaped fins 11 are spaced apart from one another in a direction (arrow X direction) perpendicular to a direction in which a heat medium such as air sent from a fan flows.
- the upper portion in the direction of gravity (arrow Z direction) of the fin portion 10 is a primary heat exchange portion 12 that exchanges heat between air and refrigerant.
- the lower portion in the direction of gravity (arrow Z direction) of the fin portion 10 is a secondary heat exchange portion 13.
- a part of the fin portion 10 occupied by the secondary heat exchange portion 13 is smaller than a part of the fin portion 10 occupied by the primary heat exchange portion 12. That is, the heat exchange area of the secondary heat exchange portion 13 is smaller than that of the primary heat exchange portion 12.
- the fin portion 10 includes the primary heat exchange portion 12 and the secondary heat exchange portion 13.
- the plate-shaped fins 11 are shared between the primary heat exchange portion 12 and the secondary heat exchange portion 13.
- the flow paths of installed heat transfer pipes that is, the flow path of the primary pipes 20 and the flow path of the secondary pipes 40 are different.
- the plate-shaped fins 11 may include primary fins that are provided at the primary heat exchange portion 12 and into which the primary pipes 20 are inserted and secondary fins that are provided at the secondary heat exchange portion 13 and into which the secondary pipes 40 are inserted.
- the primary fins are arranged in two rows and parallel to the direction in which air flows.
- the secondary fins are arranged in two rows and parallel to the direction in which air flows.
- the primary fin provided on the leeward side is a first primary fin
- the primary fin provided on the windward side is a second primary fin.
- the secondary fin provided on the leeward side is a first secondary fin
- the secondary fin provided on the windward side is a second secondary fin.
- the primary fins and the secondary fins may be arranged in more than two rows.
- the primary pipes 20 include first primary pipes 21 each having one end and the other end inserted into the first primary fins and second primary pipes 22 each having one end and the other end inserted into the second primary fins.
- the first primary pipes 21 and the second primary pipes 22 are spaced apart from one another in the direction (arrow Z direction) parallel to the direction of gravity. In Embodiment 1, the number of the first primary pipes 21 is 16, and the number of the second primary pipes 22 is 16.
- the first primary fins and the first primary pipes 21 are provided on the leeward side, and the second primary fins and the second primary pipes 22 are provided on the windward side.
- the hairpin pipes 23 are provided at the other end of the fin portion 10 (on the X 1 side of the arrow X direction).
- the hairpin pipes 23 connect the other end of each of adjacent ones of the first primary pipes 21, and connect the other end of each of adjacent ones of the second primary pipes 22.
- the first primary pipes 21, the second primary pipes 22, and the hairpin pipes 23 are flat pipes having flattened cross sections, for example.
- Fig. 2 is a side view of the heat exchanger 1 according to Embodiment 1.
- the header 30 includes a liquid-side header 31 and a gas-side header 32.
- the heat exchanger 1 acts as a condenser
- refrigerant flows from the gas-side header 32 toward the liquid-side header 31.
- the heat exchanger 1 acts as an evaporator
- the refrigerant flows from the liquid-side header 31 toward the gas-side header 32.
- the liquid-side header 31 is provided at the one end of the fin portion 10 (on the X 2 side of the arrow X direction in Fig. 1 ), and connects the one end of each of the first primary pipes 21 and the other end of a liquid pipe 60 having one end and the other end. Refrigerant in a substantially saturated liquid state flows through the liquid-side header 31.
- the liquid-side header 31 is divided at the center of the liquid-side header 31 in the direction of gravity (arrow Z direction).
- the liquid-side header 31 includes an upper header 31a serving as the upper portion of the liquid-side header 31 and a lower header 31b serving as the lower portion of the liquid-side header 31.
- Eight pipes of the first primary pipes 21 are connected to the upper header 31a, and the other eight pipes of the first primary pipes 21 are connected to the lower header 31b. That is, the refrigerant does not flow between the upper header 31a and the lower header 31b.
- the one end of the liquid pipe 60 is connected to the secondary heat exchange portion 13.
- the liquid pipe 60 includes an upper capillary pipe 61, a lower capillary pipe 62, a distributor 63, and a junction pipe 64.
- the upper capillary pipe 61 extends from the upper header 31a, and the lower capillary pipe 62 extends from the lower header 31b.
- the upper capillary pipe 61 and the lower capillary pipe 62 join at the distributor 63.
- the junction pipe 64 connects the distributor 63 and the secondary heat exchange portion 13.
- the gas-side header 32 is connected to the one end of each of the second primary pipes 22, and is provided at the one end of the fin portion 10 (on the X 2 side of the arrow X direction in Fig. 1 ). That is, the gas-side header 32 and the liquid-side header 31 are adjacent in the direction (arrow Y direction) parallel to the direction in which air flows. Refrigerant in a substantially gas state flows through the gas-side header 32.
- Fig. 3 is a cross-sectional view of the side of the heat exchanger 1 according to Embodiment 1.
- the second primary pipe 22 extends from the gas-side header 32, curves upward in the direction of gravity (in the Zi direction) at the hairpin pipe 23 at the other end of the fin portion 10, is connected to a U bend pipe 24 provided in a direction (arrow Y direction) parallel to the direction in which air flows, via a joint 44, is again connected to the hairpin pipe 23, and is connected to the first primary pipe 21 extending up to the liquid-side header 31.
- the U bend pipe 24 extends in a direction parallel to the direction in which the heat medium flows, and connects the other end of the first primary pipe 21 to the other end of the second primary pipe 22 at the other end of the fin portion 10.
- the U bend pipe 24 corresponds to the primary-pipe connecting component of the present invention.
- the primary-pipe connecting component is not limited to the U bend pipe 24 having a U shape, but may be a curved rectangular pipe.
- the second primary pipe 22 adjacent to the second primary pipe 22 described above extends from the gas-side header 32, curves downward in the direction of gravity (in the arrow Z 2 direction) at the hairpin pipe 23 at the other end of the fin portion 10, is connected to the U bend pipe 24 provided in the direction (arrow Y direction) parallel to the direction in which air flows, is again connected to the hairpin pipe 23, and is connected to the first primary pipe 21 extending up to the liquid-side header 31.
- the second primary pipes 22 are adjacent to each other in the vicinity of the gas-side header 32, that is, at a portion in which the refrigerant is in a superheated state.
- the first primary pipes 21 are adjacent to each other in the vicinity of the liquid-side header 31, that is, at a portion in which the refrigerant is in a saturated liquid state.
- the secondary pipes 40 through which the refrigerant flows, penetrate the plate-shaped fins 11 at the secondary heat exchange portion 13 in the arrangement direction (arrow X direction).
- the secondary pipes 40 include first secondary pipes 41 inserted into the first secondary fins and second secondary pipes 42 inserted into the second secondary fins. Note that, in the direction in which the fan sends air, the first secondary fins and the first secondary pipes 41 are provided on the leeward side, and the second secondary fins and the second secondary pipes 42 are provided on the windward side.
- one end of the first secondary pipe 41 is connected to the one end of the liquid pipe 60, and four first secondary pipes 41 are spaced apart from one another in the direction (arrow Z direction) parallel to the direction of gravity.
- the upper two pipes of the four first secondary pipes 41 are connected to two ends of a branch pipe such as a three-way pipe 43.
- One end of the junction pipe 64 of the liquid pipe 60 is connected to the other end of the three-way pipe 43.
- the lower two pipes of the four first secondary pipes 41 are connected to two ends of a branch pipe such as the three-way pipe 43.
- Another end of the junction pipe 64 of the liquid pipe 60 is connected to the other end of the three-way pipe 43.
- the junction pipe 64 connects the distributor 63 and the secondary heat exchange portion 13 to one another, and is divided into two paths on the side where the secondary heat exchange portion 13 is provided.
- the divided paths are each connected to one end of a different one of the three-way pipes 43.
- the one end of each of the first secondary pipes 41 is below the liquid-side header 31.
- the first secondary pipes 41 are, for example, flat pipes having flattened cross sections.
- the three-way pipes 43 are circular pipes having circular cross sections.
- One end of the second secondary pipe 42 serves as the inlet or outlet of the refrigerant, and four second secondary pipes 42 are spaced apart from one another in the direction (arrow Z direction) parallel to the direction of gravity.
- the upper two pipes of the four second secondary pipes 42 are connected to two ends of a branch pipe such as the three-way pipe 43.
- One end of a liquid inlet-outlet pipe 70 serving as the inlet or outlet of the refrigerant is connected to the other end of the three-way pipe 43.
- the lower two pipes of the four second secondary pipes 42 are connected to two ends of a branch pipe such as the three-way pipe 43.
- Another end of the liquid inlet-outlet pipe 70 is connected to the other end of the three-way pipe 43.
- liquid inlet-outlet pipe 70 is divided into two paths at the other ends of the three-way pipes 43 and the two paths join later.
- the one end of each of the second secondary pipes 42 is below the gas-side header 32.
- the second secondary pipes 42 are, for example, flat pipes having flattened cross sections.
- the three-way pipes 43 are circular pipes having circular cross sections.
- the second secondary pipe 42 and the three-way pipe 43 are joined by the joint 44 whose one end is flat and whose other end is circular.
- first secondary pipes 41 are provided on the leeward side, and the second secondary pipes 42 are provided on the windward side.
- first secondary pipe 41 and the second secondary pipe 42 adjacent to each other are not horizontal in the direction in which air flows (arrow Y direction) and are at different positions in the direction of gravity (arrow Z direction).
- Fig. 4 is another side view of the heat exchanger 1 according to Embodiment 1.
- the connecting component 50 extends in the direction (arrow Y direction) parallel to the direction in which air flows, and connects the other end of the first secondary pipe 41 and the other end of the second secondary pipe 42 at the other end of the fin portion 10.
- Fig. 7 is a top view of the secondary heat exchange portion 13 according to Embodiment 1.
- the connecting component 50 connects the first secondary pipe 41 and the second secondary pipe 42 in top view. Note that, as described above, the first secondary pipe 41 and the second secondary pipe 42 adjacent to each other are not horizontal in the direction in which air flows (arrow Y direction) and are at different positions in the direction of gravity (arrow Z direction).
- the connecting component 50 is inclined by an amount corresponding to a difference in the positions of the first secondary pipe 41 and the second secondary pipe 42 in the direction of gravity (arrow Z direction).
- Fig. 8 is a side view of the secondary heat exchange portion 13 according to Embodiment 1.
- a pipe connecting adjacent pipes such as the connecting component 50 is not used in a longitudinal direction that is the direction of gravity (arrow Z direction).
- a pipe extending from one column to another column such as the connecting component 50 is used only in a row direction that is a direction (arrow Y direction) parallel to the direction in which air flows.
- the direction in which refrigerant flows is the same in the first secondary pipes 41 adjacent to each other in the longitudinal direction and in the second secondary pipes 42 adjacent to each other in the longitudinal direction.
- the heat exchanger 1 acts as a condenser.
- Refrigerant flows into the gas-side header 32, and flows through the 16 second primary pipes 22. Heat is exchanged between air and the refrigerant flowing through the second primary pipes 22 at the fin portion 10, and the refrigerant is condensed.
- the refrigerant turns around at the hairpin pipes 23 at the other end of the fin portion 10 (on the X 1 side of the arrow X direction in Fig. 1 ), and heat is again exchanged between the refrigerant and air at the fin portion 10.
- the refrigerant is further condensed and enters a saturated liquid state.
- the saturated liquefied refrigerant flows into the U bend pipes 24, and flows from the second primary pipes 22 to the first primary pipes 21.
- a portion of the saturated liquefied refrigerant flows into the upper eight pipes of the first primary pipes 21 in the direction of gravity (arrow Z direction), and then flows into the upper header 31a of the liquid-side header 31.
- the other portion of the saturated liquefied refrigerant flows into the lower eight pipes of the first primary pipes 21 in the direction of gravity (arrow Z direction), and then flows into the lower header 31b of the liquid-side header 31.
- the refrigerant flowing through the upper header 31a flows into the upper capillary pipe 61.
- the refrigerant flowing through the lower header 31b flows into the lower capillary pipe 62.
- the divided refrigerant joins at the distributor 63, flows through the junction pipe 64, is again divided into two, flows through the three-way pipes 43, and then flows into the four first secondary pipes 41. Heat is exchanged between air and the refrigerant flowing through the first secondary pipes 41 at the fin portion 10.
- the refrigerant is further condensed and enters a subcooled state.
- the refrigerant flows into the connecting components 50 at the other end of the fin portion 10 (on the X 1 side of the arrow X direction in Fig.
- Embodiment 1 when the heat exchanger 1 acts as the condenser, the refrigerant flowing through the connecting components 50 flows in a direction opposite to the direction in which air flows. The refrigerant then flows into the second secondary pipes 42. Heat is exchanged between air and the refrigerant at the fin portion 10, further condensing the refrigerant. The refrigerant flows into the three-way pipes 43, and the subcooled refrigerant is discharged from the liquid inlet-outlet pipe 70.
- Two-phase state refrigerant flows into the three-way pipes 43 from the liquid inlet-outlet pipe 70, and flows through the second secondary pipes 42. Then, heat is exchanged between the refrigerant and air at the fin portion 10.
- the refrigerant is evaporated and flows into the connecting components 50 at the other end of the fin portion 10 (on the X 1 side of the arrow X direction in Fig. 1 ).
- the refrigerant flows from the second secondary pipes 42 to the first secondary pipes 41. Heat is exchanged between air and the refrigerant flowing through the first secondary pipes 41 at the fin portion 10.
- the refrigerant enters a saturated liquid state, flows into the three-way pipes 43, and then flows into the junction pipe 64.
- the saturated liquid state refrigerant is divided into two at the distributor 63. A portion of the refrigerant flows into the upper capillary pipe 61, and then flows into the upper header 31a of the liquid-side header 31. The other portion of the refrigerant flows into the lower capillary pipe 62, and then flows into the lower header 31b of the liquid-side header 31.
- the refrigerant flowing into the upper header 31a flows into eight pipes of the first primary pipes 21 on the upper side in the direction of gravity (arrow Z direction).
- the other refrigerant flowing into the lower header 31b flows into eight pipes of the first primary pipes 21 on the lower side in the direction of gravity (arrow Z direction).
- Heat is further exchanged between the refrigerant and air at the fin portion 10, and the refrigerant is evaporated.
- the refrigerant turns around at the hairpin pipes 23 at the other end of the fin portion 10 (on the X 1 side of the arrow X direction in Fig. 1 ), and heat is again exchanged between the refrigerant and air at the fin portion 10.
- the refrigerant is further evaporated and enters a gas state.
- the gasified refrigerant flows into the U bend pipes 24, and flows from the first primary pipes 21 to the second primary pipes 22.
- the gas state refrigerant flows into the gas-side header 32, and is then discharged from the heat exchanger 1 to the outside.
- the connecting components 50 of the heat exchanger 1 extend in the direction parallel to the direction in which a heat medium such as air flows.
- a direction in which refrigerant flows through the connecting components 50 is opposite to the direction in which air flows. Consequently, the heat exchange performance of the heat exchanger 1 improves.
- Fig. 9 is a cross-sectional view of the side of the secondary heat exchange portion 13 according to Embodiment 1.
- the connecting components 50 may be U bend pipes that are U-shaped or curved rectangular pipes.
- Embodiment 1 when the heat exchanger 1 acts as either the condenser or evaporator, at the outlet of the heat exchanger 1, refrigerant flows in the direction opposite to the direction in which air flows. Thus, when the heat exchanger 1 acts as either the condenser or evaporator, the heat exchange performance of the heat exchanger 1 improves.
- heat exchange performance is more effectively demonstrated in a case where the subcooling performance is improved by the heat exchanger 1 acting as the condenser than in a case where the heat exchange performance is improved by the heat exchanger 1 acting as the evaporator.
- a direction in which refrigerant flows through the primary-pipe connecting components of a primary heat exchange portion is the same as a direction in which refrigerant flows through the secondary-pipe connecting components of a secondary heat exchange portion.
- the heat exchanger acting as a condenser the direction in which the refrigerant flows through the secondary-pipe connecting components of the secondary heat exchange portion is opposite to a direction in which air flows. This configuration can improve heat exchange performance (subcooling performance).
- the heat exchanger acts as an evaporator
- the direction in which the refrigerant flows through the primary-pipe connecting components of the primary heat exchange portion is parallel to the direction in which air flows.
- a temperature difference between superheated gas and air at the outlet of the primary heat exchange portion cannot be sufficiently obtained. Consequently, the heat exchange performance of the heat exchanger cannot be improved.
- a pipe connecting adjacent pipes such as the connecting component 50 is not used in a longitudinal direction that is the direction of gravity (arrow Z direction).
- a pipe extending from one column to another column such as the connecting component 50 is used only in a row direction (arrow Y direction) parallel to the direction in which air flows.
- a direction in which refrigerant flows is the same in the first secondary pipes 41 adjacent to each other in the longitudinal direction and in the second secondary pipes 42 adjacent to each other in the longitudinal direction.
- the temperature of the refrigerant is substantially the same in the first secondary pipes 41 adjacent to each other in the longitudinal direction and in the second secondary pipes 42 adjacent to each other in the longitudinal direction.
- This configuration reduces heat loss caused in the plate-shaped fins 11 between the first secondary pipes 41 and in the plate-shaped fins 11 between the second secondary pipes 42. Consequently, the heat exchange performance of the heat exchanger 1 improves.
- the second primary pipes 22 are adjacent at a portion in which the refrigerant is in a superheated state, and the first primary pipes 21 are adjacent at a portion in which the refrigerant is in a saturated liquid state.
- This configuration can reduce heat loss between a superheated region and a saturation region. Consequently, the heat exchange performance of the heat exchanger 1 improves.
- the secondary heat exchange portion 13 of the heat exchanger 1 does not include the header 30.
- the heat exchanger 1 acts as a condenser, no heat is lost during transition from the saturation region to a subcooled region.
- the first secondary pipes 41 and the second secondary pipes 42 are connected to the three-way pipes 43, which are branch pipes.
- the number of branches increases to decrease pressure loss in the pipes.
- Fig. 5 is a circuit diagram of the air-conditioning apparatus 2 according to Embodiment 1.
- the air-conditioning apparatus 2 includes a refrigerant circuit 3 in which a compressor 80, a first heat exchanger 81, an expansion unit 82, and a second heat exchanger 83 are connected by pipes.
- the compressor 80 compresses refrigerant.
- the first heat exchanger 81 exchanges heat between the refrigerant and air, and acts as a condenser.
- a first fan 84 and a first motor 84a provided in the refrigerant circuit 3 are to send air toward the first heat exchanger 81.
- the expansion unit 82 expands the refrigerant.
- the second heat exchanger 83 exchanges heat between the refrigerant and air, and acts as an evaporator.
- a second fan 85 and a second motor 85a provided in the refrigerant circuit 3 are to send air toward the second heat exchanger 83.
- a four-way valve is included in the refrigerant circuit 3 to change a direction in which the refrigerant flows through the refrigerant circuit 3.
- the first heat exchanger 81 can act as the evaporator and the second heat exchanger 83 can act as the condenser.
- the heat exchanger 1 according to Embodiment 1 is used as at least one of the first heat exchanger 81 and the second heat exchanger 83 of the air-conditioning apparatus 2 according to Embodiment 1. Moreover, as the refrigerant flowing through the refrigerant circuit 3 of the air-conditioning apparatus 2, for example, an R410A refrigerant, an R32 refrigerant, an HFO1234yf refrigerant, or an HFO1123 refrigerant is used.
- the compressor 80 suctions and compresses refrigerant, and discharges the refrigerant in a high-temperature and high-pressure gas state.
- the discharged refrigerant flows into the first heat exchanger 81.
- the first heat exchanger 81 exchanges heat between the refrigerant and air supplied from the first fan 84, thereby condensing the refrigerant.
- the condensed refrigerant flows into the expansion unit 82, and the expansion unit 82 decompresses the condensed refrigerant.
- the decompressed refrigerant flows into the second heat exchanger 83.
- the second heat exchanger 83 exchanges heat between the refrigerant and air supplied from the second fan 85, thereby evaporating the refrigerant.
- the evaporated refrigerant is suctioned by the compressor 80.
- the heat exchanger 1 according to Embodiment 1 is used as at least one of the first heat exchanger 81 and the second heat exchanger 83 of the air-conditioning apparatus 2.
- the heat exchange performance of the first heat exchanger 81 or the second heat exchanger 83 in which the heat exchanger 1 according to Embodiment 1 is used improves.
- the following describes cooling energy efficiency in cooling operation and heating energy efficiency in heating operation.
- Heating energy efficiency capacity of condenser indoor heat exchanger / total input
- the heat exchanger 1 according to Embodiment 1 is used as at least one of the first heat exchanger 81 and the second heat exchanger 83 of the air-conditioning apparatus 2.
- the cooling energy efficiency and the heating energy efficiency of the air-conditioning apparatus 2 are high according to the above expressions (1) and (2). Consequently, in Embodiment 1, the air-conditioning apparatus 2 having high energy efficiency can be achieved.
- Embodiment 1 air and refrigerant are used as examples of a heat medium.
- a gas, a liquid, and a gas-liquid mixed fluid other than these examples may be used.
- the heat exchanger 1 according to Embodiment 1 may be used in an indoor unit or an outdoor unit of the air-conditioning apparatus 2.
- a refrigerating machine oil flowing through the air-conditioning apparatus 2 for example, a mineral oil, an alkylbenzene oil, an ester oil, an ether oil, or a fluorine oil can be used irrespective of whether or not such a refrigerating machine oil is dissolved in the refrigerant.
- Fig. 6 is a side view of the heat exchanger 100 according to Embodiment 2.
- Embodiment 2 is different from Embodiment 1 in that a liquid pipe 160 includes a first liquid pipe 161 and a second liquid pipe 162.
- identical reference signs are used to designate common components in Embodiments 1 and 2, and explanations for these components are omitted. Differences from Embodiment 1 are mainly described below.
- one end of the liquid pipe 160 which includes the first liquid pipe 161 and the second liquid pipe 162, is connected to a secondary heat exchange portion 13.
- the first liquid pipe 161 connects one end of a first secondary pipe 41 on the lower side of the secondary heat exchange portion 13 and the upper portion of a liquid-side header 31, that is, an upper header 31a.
- the second liquid pipe 162 connects one end of the first secondary pipe 41 on the upper side of the secondary heat exchange portion 13 and the lower portion of the liquid-side header 31, that is, a lower header 31b.
- Liquid state refrigerant concentrates at the first secondary pipe 41 on the lower side of the secondary heat exchange portion 13 by gravity.
- the first secondary pipe 41 on the lower side of the secondary heat exchange portion 13 and the upper header 31a that is far from the first secondary pipe 41 are connected.
- the first secondary pipe 41 on the upper side of the secondary heat exchange portion 13 and the lower header 31b that is close to the first secondary pipe 41 are connected.
- This configuration reduces the concentration of the refrigerant and balances distribution of the refrigerant.
- This configuration enables efficient heat exchange by the heat exchanger 100 according to Embodiment 2.
- the heat exchanger 100 according to Embodiment 2 can be also used in the air-conditioning apparatus 2 according to Embodiment 1.
- the present invention is applicable to a power saving heat pump apparatus that can be easily manufactured and has excellent heat exchange performance.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Other Air-Conditioning Systems (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Description
- The present invention relates to a heat exchanger and an air-conditioning apparatus including the heat exchanger.
- A finned tube heat exchanger is presented as a heat exchanger for use in an air-conditioning apparatus or another related apparatus. In the finned tube heat exchanger, tubes through which refrigerant flows are inserted into plate-shaped fins spaced apart from one another. In the finned tube heat exchanger, air flows through a space between the plate-shaped fins, and heat is exchanged between the air and the refrigerant flowing through the tubes.
- As such a finned tube heat exchanger,
Patent Literature 1 discloses a heat exchanger in which a first header collecting pipe is connected to one end of each of flat pipes, a second header collecting pipe is connected to the other end of each of the flat pipes, and fins are provided between the first header collecting pipe and the second header collecting pipe. The heat exchanger inPatent Literature 1 is separated into an upper heat exchange region and a lower heat exchange region, and the upper heat exchange region and the lower heat exchange region are separated in the direction of gravity. When the heat exchanger acts as a condenser, refrigerant flowing through the upper portion of the upper heat exchange region flows into the lower portion of the lower heat exchange region, and refrigerant flowing through the lower portion of the upper heat exchange region flows into the upper portion of the lower heat exchange region. Thus, the conventional technique aims to improve heat exchange efficiency by reducing heat loss due to heat exchange between gas state refrigerant and saturated liquid state refrigerant. - In addition to
Patent Literature 1,Patent Literature 2 discloses a heat exchanger separated into an upper heat exchange region (main heat exchange portion) and a lower heat exchange region (auxiliary heat exchange portion).Patent Literature 2 aims to improve the condensing capacity and evaporating capacity of the heat exchanger by optimizing the degree of subcooling of refrigerant and the heating surface area of a flat pipe. -
- Patent Literature 1: Japanese Unexamined Patent Application Publication No.
2012-163328 - Patent Literature 2: Japanese Unexamined Patent Application Publication No.
2013-83419 Pages 2 to 4) -
EP 1 031 801 A2 - However, in the heat exchangers disclosed in
Patent Literatures Patent Literatures - In view of the problems, the present invention provides a heat exchange system in which heat exchange performance can be improved and an air-conditioning apparatus including the heat exchange system.
- A heat exchange system according to an embodiment of the present invention is set forth in
claim 1. - According to an embodiment of the present invention, the primary-pipe connecting component and the secondary-pipe connecting component extend in the directions parallel to the direction in which air is sent. Thus, when the heat exchanger acts as either a condenser or an evaporator, a direction in which the refrigerant flows through the primary-pipe connecting component or the secondary-pipe connecting component is opposite to the direction in which air is sent. Consequently, heat exchange performance can be improved.
-
- [
Fig. 1] Fig. 1 is a front view of aheat exchanger 1 according toEmbodiment 1. - [
Fig. 2] Fig. 2 is a side view of theheat exchanger 1 according toEmbodiment 1. - [
Fig. 3] Fig. 3 is a cross-sectional view of the side of theheat exchanger 1 according toEmbodiment 1. - [
Fig. 4] Fig. 4 is another side view of theheat exchanger 1 according toEmbodiment 1. - [
Fig. 5] Fig. 5 is a circuit diagram of an air-conditioning apparatus 2 according toEmbodiment 1. - [
Fig. 6] Fig. 6 is a side view of aheat exchanger 100 according toEmbodiment 2. - [
Fig. 7] Fig. 7 is a top view of a secondaryheat exchange portion 13 according to Embodiment 1. - [
Fig. 8] Fig. 8 is a side view of the secondaryheat exchange portion 13 according toEmbodiment 1. - [
Fig. 9] Fig. 9 is a cross-sectional view of the side of the secondaryheat exchange portion 13 according toEmbodiment 1. - The following describes embodiments of a heat exchanger and an air-conditioning apparatus according to the present invention with reference to the drawings. Note that the present invention is not limited to the embodiments described below. Moreover, in the following drawings including
Fig. 1 , the size ratios of structural components may be different from the actual size ratios. -
Fig. 1 is a front view of aheat exchanger 1 according toEmbodiment 1. The following describes theheat exchanger 1 with reference toFig. 1 . AsFig. 1 illustrates, theheat exchanger 1 includes afin portion 10,primary pipes 20,hairpin pipes 23, aheader 30,secondary pipes 40, and connecting components (secondary-pipe connecting components) 50. - In the
fin portion 10 having one end and the other end, plate-shaped fins 11 are spaced apart from one another in a direction (arrow X direction) perpendicular to a direction in which a heat medium such as air sent from a fan flows. The upper portion in the direction of gravity (arrow Z direction) of thefin portion 10 is a primaryheat exchange portion 12 that exchanges heat between air and refrigerant. The lower portion in the direction of gravity (arrow Z direction) of thefin portion 10 is a secondaryheat exchange portion 13. A part of thefin portion 10 occupied by the secondaryheat exchange portion 13 is smaller than a part of thefin portion 10 occupied by the primaryheat exchange portion 12. That is, the heat exchange area of the secondaryheat exchange portion 13 is smaller than that of the primaryheat exchange portion 12. Thus, thefin portion 10 includes the primaryheat exchange portion 12 and the secondaryheat exchange portion 13. The plate-shaped fins 11 are shared between the primaryheat exchange portion 12 and the secondaryheat exchange portion 13. However, the flow paths of installed heat transfer pipes, that is, the flow path of theprimary pipes 20 and the flow path of thesecondary pipes 40 are different. - Note that the plate-
shaped fins 11 may include primary fins that are provided at the primaryheat exchange portion 12 and into which theprimary pipes 20 are inserted and secondary fins that are provided at the secondaryheat exchange portion 13 and into which thesecondary pipes 40 are inserted. The primary fins are arranged in two rows and parallel to the direction in which air flows. Likewise, the secondary fins are arranged in two rows and parallel to the direction in which air flows. The primary fin provided on the leeward side is a first primary fin, and the primary fin provided on the windward side is a second primary fin. The secondary fin provided on the leeward side is a first secondary fin, and the secondary fin provided on the windward side is a second secondary fin. Moreover, the primary fins and the secondary fins may be arranged in more than two rows. - The
primary pipes 20, through which refrigerant flows, penetrate the plate-shaped fins 11 at the primaryheat exchange portion 12 in an arrangement direction (arrow X direction). Theprimary pipes 20 include firstprimary pipes 21 each having one end and the other end inserted into the first primary fins and secondprimary pipes 22 each having one end and the other end inserted into the second primary fins. The firstprimary pipes 21 and the secondprimary pipes 22 are spaced apart from one another in the direction (arrow Z direction) parallel to the direction of gravity. InEmbodiment 1, the number of the firstprimary pipes 21 is 16, and the number of the secondprimary pipes 22 is 16. Note that, in the direction in which the fan sends air, the first primary fins and the firstprimary pipes 21 are provided on the leeward side, and the second primary fins and the secondprimary pipes 22 are provided on the windward side. Moreover, thehairpin pipes 23 are provided at the other end of the fin portion 10 (on the X1 side of the arrow X direction). Thehairpin pipes 23 connect the other end of each of adjacent ones of the firstprimary pipes 21, and connect the other end of each of adjacent ones of the secondprimary pipes 22. Note that the firstprimary pipes 21, the secondprimary pipes 22, and thehairpin pipes 23 are flat pipes having flattened cross sections, for example. -
Fig. 2 is a side view of theheat exchanger 1 according toEmbodiment 1. AsFig. 2 illustrates, theheader 30 includes a liquid-side header 31 and a gas-side header 32. When theheat exchanger 1 acts as a condenser, refrigerant flows from the gas-side header 32 toward the liquid-side header 31. When theheat exchanger 1 acts as an evaporator, the refrigerant flows from the liquid-side header 31 toward the gas-side header 32. The liquid-side header 31 is provided at the one end of the fin portion 10 (on the X2 side of the arrow X direction inFig. 1 ), and connects the one end of each of the firstprimary pipes 21 and the other end of aliquid pipe 60 having one end and the other end. Refrigerant in a substantially saturated liquid state flows through the liquid-side header 31. - Moreover, the liquid-
side header 31 is divided at the center of the liquid-side header 31 in the direction of gravity (arrow Z direction). The liquid-side header 31 includes anupper header 31a serving as the upper portion of the liquid-side header 31 and alower header 31b serving as the lower portion of the liquid-side header 31. Eight pipes of the firstprimary pipes 21 are connected to theupper header 31a, and the other eight pipes of the firstprimary pipes 21 are connected to thelower header 31b. That is, the refrigerant does not flow between theupper header 31a and thelower header 31b. - The one end of the
liquid pipe 60 is connected to the secondaryheat exchange portion 13. Theliquid pipe 60 includes anupper capillary pipe 61, alower capillary pipe 62, adistributor 63, and ajunction pipe 64. Theupper capillary pipe 61 extends from theupper header 31a, and thelower capillary pipe 62 extends from thelower header 31b. Theupper capillary pipe 61 and thelower capillary pipe 62 join at thedistributor 63. Thejunction pipe 64 connects thedistributor 63 and the secondaryheat exchange portion 13. - Moreover, the gas-
side header 32 is connected to the one end of each of the secondprimary pipes 22, and is provided at the one end of the fin portion 10 (on the X2 side of the arrow X direction inFig. 1 ). That is, the gas-side header 32 and the liquid-side header 31 are adjacent in the direction (arrow Y direction) parallel to the direction in which air flows. Refrigerant in a substantially gas state flows through the gas-side header 32. -
Fig. 3 is a cross-sectional view of the side of theheat exchanger 1 according toEmbodiment 1. AsFig. 3 illustrates, in the primaryheat exchange portion 12, the secondprimary pipe 22 extends from the gas-side header 32, curves upward in the direction of gravity (in the Zi direction) at thehairpin pipe 23 at the other end of thefin portion 10, is connected to aU bend pipe 24 provided in a direction (arrow Y direction) parallel to the direction in which air flows, via a joint 44, is again connected to thehairpin pipe 23, and is connected to the firstprimary pipe 21 extending up to the liquid-side header 31. That is, theU bend pipe 24 extends in a direction parallel to the direction in which the heat medium flows, and connects the other end of the firstprimary pipe 21 to the other end of the secondprimary pipe 22 at the other end of thefin portion 10. Note that theU bend pipe 24 corresponds to the primary-pipe connecting component of the present invention. However, the primary-pipe connecting component is not limited to theU bend pipe 24 having a U shape, but may be a curved rectangular pipe. - Moreover, the second
primary pipe 22 adjacent to the secondprimary pipe 22 described above extends from the gas-side header 32, curves downward in the direction of gravity (in the arrow Z2 direction) at thehairpin pipe 23 at the other end of thefin portion 10, is connected to theU bend pipe 24 provided in the direction (arrow Y direction) parallel to the direction in which air flows, is again connected to thehairpin pipe 23, and is connected to the firstprimary pipe 21 extending up to the liquid-side header 31. Thus, in the primaryheat exchange portion 12, the secondprimary pipes 22 are adjacent to each other in the vicinity of the gas-side header 32, that is, at a portion in which the refrigerant is in a superheated state. Moreover, the firstprimary pipes 21 are adjacent to each other in the vicinity of the liquid-side header 31, that is, at a portion in which the refrigerant is in a saturated liquid state. - The
secondary pipes 40, through which the refrigerant flows, penetrate the plate-shapedfins 11 at the secondaryheat exchange portion 13 in the arrangement direction (arrow X direction). Thesecondary pipes 40 include firstsecondary pipes 41 inserted into the first secondary fins and secondsecondary pipes 42 inserted into the second secondary fins. Note that, in the direction in which the fan sends air, the first secondary fins and the firstsecondary pipes 41 are provided on the leeward side, and the second secondary fins and the secondsecondary pipes 42 are provided on the windward side. - As
Fig. 2 illustrates, one end of the firstsecondary pipe 41 is connected to the one end of theliquid pipe 60, and four firstsecondary pipes 41 are spaced apart from one another in the direction (arrow Z direction) parallel to the direction of gravity. The upper two pipes of the four firstsecondary pipes 41 are connected to two ends of a branch pipe such as a three-way pipe 43. One end of thejunction pipe 64 of theliquid pipe 60 is connected to the other end of the three-way pipe 43. Moreover, the lower two pipes of the four firstsecondary pipes 41 are connected to two ends of a branch pipe such as the three-way pipe 43. Another end of thejunction pipe 64 of theliquid pipe 60 is connected to the other end of the three-way pipe 43. - Note that, as described above, the
junction pipe 64 connects thedistributor 63 and the secondaryheat exchange portion 13 to one another, and is divided into two paths on the side where the secondaryheat exchange portion 13 is provided. The divided paths are each connected to one end of a different one of the three-way pipes 43. Note that the one end of each of the firstsecondary pipes 41 is below the liquid-side header 31. Moreover, the firstsecondary pipes 41 are, for example, flat pipes having flattened cross sections. The three-way pipes 43 are circular pipes having circular cross sections. Thus, the firstsecondary pipe 41 and the three-way pipe 43 are joined by the joint 44 whose one end is flat and whose other end is circular. - One end of the second
secondary pipe 42 serves as the inlet or outlet of the refrigerant, and four secondsecondary pipes 42 are spaced apart from one another in the direction (arrow Z direction) parallel to the direction of gravity. The upper two pipes of the four secondsecondary pipes 42 are connected to two ends of a branch pipe such as the three-way pipe 43. One end of a liquid inlet-outlet pipe 70 serving as the inlet or outlet of the refrigerant is connected to the other end of the three-way pipe 43. Moreover, the lower two pipes of the four secondsecondary pipes 42 are connected to two ends of a branch pipe such as the three-way pipe 43. Another end of the liquid inlet-outlet pipe 70 is connected to the other end of the three-way pipe 43. - Note that the liquid inlet-
outlet pipe 70 is divided into two paths at the other ends of the three-way pipes 43 and the two paths join later. Note that the one end of each of the secondsecondary pipes 42 is below the gas-side header 32. Moreover, the secondsecondary pipes 42 are, for example, flat pipes having flattened cross sections. The three-way pipes 43 are circular pipes having circular cross sections. Thus, the secondsecondary pipe 42 and the three-way pipe 43 are joined by the joint 44 whose one end is flat and whose other end is circular. - Note that, in the direction in which the fan sends air, the first
secondary pipes 41 are provided on the leeward side, and the secondsecondary pipes 42 are provided on the windward side. Moreover, the firstsecondary pipe 41 and the secondsecondary pipe 42 adjacent to each other are not horizontal in the direction in which air flows (arrow Y direction) and are at different positions in the direction of gravity (arrow Z direction). -
Fig. 4 is another side view of theheat exchanger 1 according toEmbodiment 1. AsFig. 4 illustrates, the connectingcomponent 50 extends in the direction (arrow Y direction) parallel to the direction in which air flows, and connects the other end of the firstsecondary pipe 41 and the other end of the secondsecondary pipe 42 at the other end of thefin portion 10.Fig. 7 is a top view of the secondaryheat exchange portion 13 according toEmbodiment 1. AsFig. 7 illustrates, the connectingcomponent 50 connects the firstsecondary pipe 41 and the secondsecondary pipe 42 in top view. Note that, as described above, the firstsecondary pipe 41 and the secondsecondary pipe 42 adjacent to each other are not horizontal in the direction in which air flows (arrow Y direction) and are at different positions in the direction of gravity (arrow Z direction). Thus, the connectingcomponent 50 is inclined by an amount corresponding to a difference in the positions of the firstsecondary pipe 41 and the secondsecondary pipe 42 in the direction of gravity (arrow Z direction). -
Fig. 8 is a side view of the secondaryheat exchange portion 13 according toEmbodiment 1. AsFig. 8 illustrates, as described above, in the secondaryheat exchange portion 13, a pipe connecting adjacent pipes such as the connectingcomponent 50 is not used in a longitudinal direction that is the direction of gravity (arrow Z direction). A pipe extending from one column to another column such as the connectingcomponent 50 is used only in a row direction that is a direction (arrow Y direction) parallel to the direction in which air flows. Thus, the direction in which refrigerant flows is the same in the firstsecondary pipes 41 adjacent to each other in the longitudinal direction and in the secondsecondary pipes 42 adjacent to each other in the longitudinal direction. - The following describes operations of the
heat exchanger 1 according toEmbodiment 1. - The following describes a case in which the
heat exchanger 1 acts as a condenser. Refrigerant flows into the gas-side header 32, and flows through the 16 secondprimary pipes 22. Heat is exchanged between air and the refrigerant flowing through the secondprimary pipes 22 at thefin portion 10, and the refrigerant is condensed. The refrigerant turns around at thehairpin pipes 23 at the other end of the fin portion 10 (on the X1 side of the arrow X direction inFig. 1 ), and heat is again exchanged between the refrigerant and air at thefin portion 10. The refrigerant is further condensed and enters a saturated liquid state. The saturated liquefied refrigerant flows into theU bend pipes 24, and flows from the secondprimary pipes 22 to the firstprimary pipes 21. A portion of the saturated liquefied refrigerant flows into the upper eight pipes of the firstprimary pipes 21 in the direction of gravity (arrow Z direction), and then flows into theupper header 31a of the liquid-side header 31. The other portion of the saturated liquefied refrigerant flows into the lower eight pipes of the firstprimary pipes 21 in the direction of gravity (arrow Z direction), and then flows into thelower header 31b of the liquid-side header 31. - The refrigerant flowing through the
upper header 31a flows into theupper capillary pipe 61. The refrigerant flowing through thelower header 31b flows into thelower capillary pipe 62. The divided refrigerant joins at thedistributor 63, flows through thejunction pipe 64, is again divided into two, flows through the three-way pipes 43, and then flows into the four firstsecondary pipes 41. Heat is exchanged between air and the refrigerant flowing through the firstsecondary pipes 41 at thefin portion 10. Thus, the refrigerant is further condensed and enters a subcooled state. The refrigerant flows into the connectingcomponents 50 at the other end of the fin portion 10 (on the X1 side of the arrow X direction inFig. 1 ), and flows from the firstsecondary pipes 41 to the secondsecondary pipes 42. Note that, inEmbodiment 1, when theheat exchanger 1 acts as the condenser, the refrigerant flowing through the connectingcomponents 50 flows in a direction opposite to the direction in which air flows. The refrigerant then flows into the secondsecondary pipes 42. Heat is exchanged between air and the refrigerant at thefin portion 10, further condensing the refrigerant. The refrigerant flows into the three-way pipes 43, and the subcooled refrigerant is discharged from the liquid inlet-outlet pipe 70. - The following describes a case in which the
heat exchanger 1 acts as an evaporator. Two-phase state refrigerant flows into the three-way pipes 43 from the liquid inlet-outlet pipe 70, and flows through the secondsecondary pipes 42. Then, heat is exchanged between the refrigerant and air at thefin portion 10. The refrigerant is evaporated and flows into the connectingcomponents 50 at the other end of the fin portion 10 (on the X1 side of the arrow X direction inFig. 1 ). The refrigerant flows from the secondsecondary pipes 42 to the firstsecondary pipes 41. Heat is exchanged between air and the refrigerant flowing through the firstsecondary pipes 41 at thefin portion 10. The refrigerant enters a saturated liquid state, flows into the three-way pipes 43, and then flows into thejunction pipe 64. The saturated liquid state refrigerant is divided into two at thedistributor 63. A portion of the refrigerant flows into theupper capillary pipe 61, and then flows into theupper header 31a of the liquid-side header 31. The other portion of the refrigerant flows into thelower capillary pipe 62, and then flows into thelower header 31b of the liquid-side header 31. - The refrigerant flowing into the
upper header 31a flows into eight pipes of the firstprimary pipes 21 on the upper side in the direction of gravity (arrow Z direction). The other refrigerant flowing into thelower header 31b flows into eight pipes of the firstprimary pipes 21 on the lower side in the direction of gravity (arrow Z direction). Heat is further exchanged between the refrigerant and air at thefin portion 10, and the refrigerant is evaporated. The refrigerant turns around at thehairpin pipes 23 at the other end of the fin portion 10 (on the X1 side of the arrow X direction inFig. 1 ), and heat is again exchanged between the refrigerant and air at thefin portion 10. The refrigerant is further evaporated and enters a gas state. The gasified refrigerant flows into theU bend pipes 24, and flows from the firstprimary pipes 21 to the secondprimary pipes 22. The gas state refrigerant flows into the gas-side header 32, and is then discharged from theheat exchanger 1 to the outside. - The following describes effects of the
heat exchanger 1 according toEmbodiment 1. As described above, the connectingcomponents 50 of theheat exchanger 1 extend in the direction parallel to the direction in which a heat medium such as air flows. Thus, when theheat exchanger 1 acts as a condenser, a direction in which refrigerant flows through the connectingcomponents 50 is opposite to the direction in which air flows. Consequently, the heat exchange performance of theheat exchanger 1 improves. -
Fig. 9 is a cross-sectional view of the side of the secondaryheat exchange portion 13 according toEmbodiment 1. AsFig. 9 illustrates, inEmbodiment 1, when the secondaryheat exchange portion 13 of theheat exchanger 1 acts as a condenser, the refrigerant flows through the connectingcomponents 50 in a direction opposite to the direction in which air flows. Consequently, the subcooling performance of the secondaryheat exchange portion 13 improves. Note that the connectingcomponents 50 may be U bend pipes that are U-shaped or curved rectangular pipes. Thus, when theheat exchanger 1 acts as the condenser, at the outlet of the secondaryheat exchange portion 13 or the outlet of theheat exchanger 1, a direction in which the refrigerant flows is opposite to the direction in which air flows. - When the primary
heat exchange portion 12 of theheat exchanger 1 acts as an evaporator, refrigerant flows through the U bend pipes 24 (primary-pipe connecting components) in a direction opposite to the direction in which air flows. Thus, when theheat exchanger 1 acts as the evaporator, at the outlet of the primaryheat exchange portion 12 or the outlet of theheat exchanger 1, a direction in which the refrigerant flows is opposite to the direction in which air flows. A temperature difference between superheated gas and air can be sufficiently obtained at the outlet of the primaryheat exchange portion 12. Consequently, the heat exchange performance of theheat exchanger 1 improves. - In
Embodiment 1, when theheat exchanger 1 acts as either the condenser or evaporator, at the outlet of theheat exchanger 1, refrigerant flows in the direction opposite to the direction in which air flows. Thus, when theheat exchanger 1 acts as either the condenser or evaporator, the heat exchange performance of theheat exchanger 1 improves. - Note that heat exchange performance is more effectively demonstrated in a case where the subcooling performance is improved by the
heat exchanger 1 acting as the condenser than in a case where the heat exchange performance is improved by theheat exchanger 1 acting as the evaporator. In a conventional heat exchanger, a direction in which refrigerant flows through the primary-pipe connecting components of a primary heat exchange portion is the same as a direction in which refrigerant flows through the secondary-pipe connecting components of a secondary heat exchange portion. By the heat exchanger acting as a condenser, the direction in which the refrigerant flows through the secondary-pipe connecting components of the secondary heat exchange portion is opposite to a direction in which air flows. This configuration can improve heat exchange performance (subcooling performance). However, when the heat exchanger acts as an evaporator, the direction in which the refrigerant flows through the primary-pipe connecting components of the primary heat exchange portion is parallel to the direction in which air flows. Thus, a temperature difference between superheated gas and air at the outlet of the primary heat exchange portion cannot be sufficiently obtained. Consequently, the heat exchange performance of the heat exchanger cannot be improved. - At the secondary
heat exchange portion 13, a pipe connecting adjacent pipes such as the connectingcomponent 50 is not used in a longitudinal direction that is the direction of gravity (arrow Z direction). A pipe extending from one column to another column such as the connectingcomponent 50 is used only in a row direction (arrow Y direction) parallel to the direction in which air flows. Thus, when the secondaryheat exchange portion 13 of theheat exchanger 1 acts as the condenser, a direction in which refrigerant flows is the same in the firstsecondary pipes 41 adjacent to each other in the longitudinal direction and in the secondsecondary pipes 42 adjacent to each other in the longitudinal direction. Thus, the temperature of the refrigerant is substantially the same in the firstsecondary pipes 41 adjacent to each other in the longitudinal direction and in the secondsecondary pipes 42 adjacent to each other in the longitudinal direction. This configuration reduces heat loss caused in the plate-shapedfins 11 between the firstsecondary pipes 41 and in the plate-shapedfins 11 between the secondsecondary pipes 42. Consequently, the heat exchange performance of theheat exchanger 1 improves. - Moreover, in the primary
heat exchange portion 12 of theheat exchanger 1, the secondprimary pipes 22 are adjacent at a portion in which the refrigerant is in a superheated state, and the firstprimary pipes 21 are adjacent at a portion in which the refrigerant is in a saturated liquid state. This configuration can reduce heat loss between a superheated region and a saturation region. Consequently, the heat exchange performance of theheat exchanger 1 improves. - Moreover, unlike the primary
heat exchange portion 12, the secondaryheat exchange portion 13 of theheat exchanger 1 does not include theheader 30. Thus, when theheat exchanger 1 acts as a condenser, no heat is lost during transition from the saturation region to a subcooled region. Furthermore, in the secondaryheat exchange portion 13, the firstsecondary pipes 41 and the secondsecondary pipes 42 are connected to the three-way pipes 43, which are branch pipes. Thus, the number of branches increases to decrease pressure loss in the pipes. - The following describes an air-
conditioning apparatus 2 according toEmbodiment 1.Fig. 5 is a circuit diagram of the air-conditioning apparatus 2 according toEmbodiment 1. The air-conditioning apparatus 2 includes arefrigerant circuit 3 in which acompressor 80, afirst heat exchanger 81, anexpansion unit 82, and asecond heat exchanger 83 are connected by pipes. Thecompressor 80 compresses refrigerant. Thefirst heat exchanger 81 exchanges heat between the refrigerant and air, and acts as a condenser. Afirst fan 84 and afirst motor 84a provided in therefrigerant circuit 3 are to send air toward thefirst heat exchanger 81. - The
expansion unit 82 expands the refrigerant. Thesecond heat exchanger 83 exchanges heat between the refrigerant and air, and acts as an evaporator. Asecond fan 85 and asecond motor 85a provided in therefrigerant circuit 3 are to send air toward thesecond heat exchanger 83. Note that, although not illustrated inFig. 5 , a four-way valve is included in therefrigerant circuit 3 to change a direction in which the refrigerant flows through therefrigerant circuit 3. Thus, thefirst heat exchanger 81 can act as the evaporator and thesecond heat exchanger 83 can act as the condenser. - The
heat exchanger 1 according toEmbodiment 1 is used as at least one of thefirst heat exchanger 81 and thesecond heat exchanger 83 of the air-conditioning apparatus 2 according toEmbodiment 1. Moreover, as the refrigerant flowing through therefrigerant circuit 3 of the air-conditioning apparatus 2, for example, an R410A refrigerant, an R32 refrigerant, an HFO1234yf refrigerant, or an HFO1123 refrigerant is used. - The following describes operations of the air-
conditioning apparatus 2 according toEmbodiment 1. Thecompressor 80 suctions and compresses refrigerant, and discharges the refrigerant in a high-temperature and high-pressure gas state. The discharged refrigerant flows into thefirst heat exchanger 81. Thefirst heat exchanger 81 exchanges heat between the refrigerant and air supplied from thefirst fan 84, thereby condensing the refrigerant. The condensed refrigerant flows into theexpansion unit 82, and theexpansion unit 82 decompresses the condensed refrigerant. The decompressed refrigerant flows into thesecond heat exchanger 83. Thesecond heat exchanger 83 exchanges heat between the refrigerant and air supplied from thesecond fan 85, thereby evaporating the refrigerant. The evaporated refrigerant is suctioned by thecompressor 80. - The following describes effects of the air-
conditioning apparatus 2 according toEmbodiment 1. Theheat exchanger 1 according toEmbodiment 1 is used as at least one of thefirst heat exchanger 81 and thesecond heat exchanger 83 of the air-conditioning apparatus 2. Thus, the heat exchange performance of thefirst heat exchanger 81 or thesecond heat exchanger 83 in which theheat exchanger 1 according toEmbodiment 1 is used improves. The following describes cooling energy efficiency in cooling operation and heating energy efficiency in heating operation. The cooling energy efficiency is calculated by the following expression (1). -
- The
heat exchanger 1 according toEmbodiment 1 is used as at least one of thefirst heat exchanger 81 and thesecond heat exchanger 83 of the air-conditioning apparatus 2. Thus, the cooling energy efficiency and the heating energy efficiency of the air-conditioning apparatus 2 are high according to the above expressions (1) and (2). Consequently, inEmbodiment 1, the air-conditioning apparatus 2 having high energy efficiency can be achieved. - Moreover, when a refrigerant including the HFO1123 refrigerant, which has a low critical temperature, is used as the refrigerant flowing through the
refrigerant circuit 3 of the air-conditioning apparatus 2, an enthalpy difference needs to be ensured on a high-pressure side. The subcooling performance or total heat exchange performance of theheat exchanger 1 according toEmbodiment 1 improves, thereby increasing a difference between a superheated region and a subcooled region. This configuration can sufficiently ensure the enthalpy difference on the high-pressure side. Thus, even when the refrigerant including the HFO1123 refrigerant is used, the air-conditioning apparatus 2 can sufficiently demonstrate its performance. - Note that, in
Embodiment 1, air and refrigerant are used as examples of a heat medium. However, a gas, a liquid, and a gas-liquid mixed fluid other than these examples may be used. Moreover, theheat exchanger 1 according toEmbodiment 1 may be used in an indoor unit or an outdoor unit of the air-conditioning apparatus 2. Furthermore, as a refrigerating machine oil flowing through the air-conditioning apparatus 2, for example, a mineral oil, an alkylbenzene oil, an ester oil, an ether oil, or a fluorine oil can be used irrespective of whether or not such a refrigerating machine oil is dissolved in the refrigerant. - The following describes a
heat exchanger 100 according toEmbodiment 2.Fig. 6 is a side view of theheat exchanger 100 according toEmbodiment 2.Embodiment 2 is different fromEmbodiment 1 in that aliquid pipe 160 includes a firstliquid pipe 161 and a secondliquid pipe 162. InEmbodiment 2, identical reference signs are used to designate common components inEmbodiments Embodiment 1 are mainly described below. - As
Fig. 6 illustrates, one end of theliquid pipe 160, which includes the firstliquid pipe 161 and the secondliquid pipe 162, is connected to a secondaryheat exchange portion 13. The firstliquid pipe 161 connects one end of a firstsecondary pipe 41 on the lower side of the secondaryheat exchange portion 13 and the upper portion of a liquid-side header 31, that is, anupper header 31a. Moreover, the secondliquid pipe 162 connects one end of the firstsecondary pipe 41 on the upper side of the secondaryheat exchange portion 13 and the lower portion of the liquid-side header 31, that is, alower header 31b. - Liquid state refrigerant concentrates at the first
secondary pipe 41 on the lower side of the secondaryheat exchange portion 13 by gravity. Thus, the firstsecondary pipe 41 on the lower side of the secondaryheat exchange portion 13 and theupper header 31a that is far from the firstsecondary pipe 41 are connected. Moreover, the firstsecondary pipe 41 on the upper side of the secondaryheat exchange portion 13 and thelower header 31b that is close to the firstsecondary pipe 41 are connected. This configuration reduces the concentration of the refrigerant and balances distribution of the refrigerant. This configuration enables efficient heat exchange by theheat exchanger 100 according toEmbodiment 2. Note that theheat exchanger 100 according toEmbodiment 2 can be also used in the air-conditioning apparatus 2 according toEmbodiment 1. - Note that the present invention is applicable to a power saving heat pump apparatus that can be easily manufactured and has excellent heat exchange performance.
- 1
heat exchanger 2 air-conditioning apparatus 3refrigerant circuit 10fin portion 11 plate-shapedfin 12 primaryheat exchange portion 13 secondaryheat exchange portion 20primary pipe 21 firstprimary pipe 22 secondprimary pipe 23 hairpin pipe 24 U bend pipe (primary-pipe connecting component) 30header 31 liquid-side header 31aupper header 31blower header 32 gas-side header 40secondary pipe 41 firstsecondary pipe 42 secondsecondary pipe 43 three-way pipe 44 joint 50 connecting component (secondary-pipe connecting component) 60liquid pipe 61upper capillary pipe 62lower capillary pipe 63distributor 64 junction pipe70 liquid inlet-outlet pipe 80compressor 81first heat exchanger 82expansion unit 83second heat exchanger 84first fan 84afirst motor 85second fan 85asecond motor 100heat exchanger 160liquid pipe 161 firstliquid pipe 162 second liquid pipe
Claims (8)
- A heat exchange system comprising a heat exchanger (1) and a fan (84, 85), the fan (84, 85) being configured to send air,
the heat exchanger (1) comprising a primary heat exchange portion (12), a secondary heat exchange portion (13), and a liquid pipe (60),
the primary heat exchange portion (12) including
first primary fins provided parallel to a direction in which the fan sends air,
first primary pipes (21) that are inserted into the first primary fins and through which refrigerant flows,
second primary fins positioned windward of the first primary fins and provided parallel to the direction in which the fan (84, 85) sends air,
second primary pipes (22) that are inserted into the second primary fins and through which the refrigerant flows, and
a primary-pipe connecting component (24) extending in a direction parallel to the direction in which the fan sends air, and connecting one of the first primary pipes (21) and one of the second primary pipes (22),
the secondary heat exchange portion (13) including
first secondary fins provided parallel to the direction in which the fan sends air, first secondary pipes (41) that are inserted into the first secondary fins and through which the refrigerant flows,
second secondary fins positioned windward of the first secondary fins and provided in parallel to the direction in which the fan sends air,
second secondary pipes (42) that are inserted into the second secondary fins and through which the refrigerant flows, and
a secondary-pipe connecting component (50) extending in the direction parallel to the direction in which the fan sends air, and connecting one of the first secondary pipes (41) and one of the second secondary pipes (42),
the liquid pipe (60) connecting the primary heat exchange portion (12) and the secondary heat exchange portion (13),
when the heat exchanger (1) acts as an evaporator, the refrigerant flowing through the secondary heat exchange portion (13) from the second secondary pipes (42) toward the first secondary pipes (41), flowing into the primary heat exchange portion (12) via the first secondary pipes (41) and the liquid pipe (60), and flowing through the primary heat exchange portion (12) from the first primary pipes (21) toward the second primary pipes (22),
when the heat exchanger (1) acts as a condenser, the refrigerant flowing through the primary heat exchange portion (12) from the second primary pipes (22) toward the first primary pipes (21), flowing into the secondary heat exchange portion (13) from the first primary pipes (21) via the liquid pipe (60), and flowing through the secondary heat exchange portion (13) from the first secondary pipes (41) toward the second secondary pipes (42). - The heat exchange system of claim 1, wherein, when the secondary heat exchange portion (13) acts as a condenser, the refrigerant flowing through the secondary-pipe connecting component (50) flows in a direction opposite to the direction in which the fan sends air.
- The heat exchange system of claim 1 or claim 2, wherein, when the primary heat exchange portion (12) acts as an evaporator, the refrigerant flowing through the primary-pipe connecting component (24) flows in a direction opposite to the direction in which the fan sends air.
- The heat exchange system of any one of claims 1 to 3, wherein
the secondary heat exchange portion (13) is below the primary heat exchange portion (12) in a direction of gravity, and
the liquid pipe (60) includes
a first liquid pipe (161) connecting an upper portion of a liquid-side header (31) connected to one end of one of the first primary pipes (21) and one end of one of the first secondary pipes (41) positioned on a lower side of the secondary heat exchange portion (13) in the direction of gravity, and
a second liquid pipe (162) connecting a lower portion of the liquid-side header (31) and one end of one of the first secondary pipes (41) positioned on an upper side of the secondary heat exchange portion (13) in the direction of gravity. - The heat exchange system of any one of claims 1 to 4, wherein the first primary pipes (21) and the second primary pipes (22) are spaced apart from one another in a direction parallel to a direction of gravity.
- The heat exchange system of any one of claims 1 to 5, wherein
the first secondary pipes (41) are spaced apart from one another in a direction parallel to a direction of gravity, and
the heat exchanger (1) further comprises a branch pipe (43) connecting one end of the liquid pipe (60) and the first secondary pipes (41). - The heat exchange system of any one of claims 1 to 6, wherein the refrigerant includes an HFO1123 refrigerant.
- An air-conditioning apparatus (2) comprising:a compressor (80) for compressing the refrigerant; andthe heat exchange system of any one of claims 1 to 7.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2014/056018 WO2015132963A1 (en) | 2014-03-07 | 2014-03-07 | Heat exchanger and air conditioner |
PCT/JP2015/056724 WO2015133626A1 (en) | 2014-03-07 | 2015-03-06 | Heat exchanger and air conditioner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3128263A1 EP3128263A1 (en) | 2017-02-08 |
EP3128263A4 EP3128263A4 (en) | 2018-01-10 |
EP3128263B1 true EP3128263B1 (en) | 2021-01-20 |
Family
ID=54054795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15757924.4A Active EP3128263B1 (en) | 2014-03-07 | 2015-03-06 | Heat exchanger and air conditioner |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3128263B1 (en) |
JP (1) | JPWO2015133626A1 (en) |
WO (2) | WO2015132963A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6727297B2 (en) * | 2016-05-19 | 2020-07-22 | 三菱電機株式会社 | Outdoor unit and refrigeration cycle apparatus including the same |
JP6910436B2 (en) * | 2017-06-29 | 2021-07-28 | 三菱電機株式会社 | Outdoor unit and refrigeration cycle device |
JPWO2019155571A1 (en) * | 2018-02-08 | 2020-11-19 | 三菱電機株式会社 | Heat exchanger and refrigeration cycle equipment |
US12000633B2 (en) | 2019-01-21 | 2024-06-04 | Mitsubishi Electric Corporation | Outdoor unit and air-conditioning apparatus |
WO2022042556A1 (en) * | 2020-08-26 | 2022-03-03 | 广东美的暖通设备有限公司 | Air conditioning apparatus and electronic control box |
CN116438415A (en) * | 2020-11-24 | 2023-07-14 | 三菱电机株式会社 | Refrigeration cycle device |
WO2022244126A1 (en) * | 2021-05-19 | 2022-11-24 | 三菱電機株式会社 | Air-conditioning device |
WO2023275917A1 (en) * | 2021-06-28 | 2023-01-05 | 三菱電機株式会社 | Air-refrigerant heat exchanger |
CN115235145A (en) * | 2022-07-21 | 2022-10-25 | 北京工业大学 | Heat pump system with sleeve pipe fin type heat exchanger |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000249479A (en) * | 1999-02-26 | 2000-09-14 | Matsushita Electric Ind Co Ltd | Heat exchanger |
JP3888000B2 (en) * | 1999-08-27 | 2007-02-28 | 株式会社日立製作所 | Air conditioner |
JP2003014389A (en) * | 2001-06-27 | 2003-01-15 | Mitsubishi Heavy Ind Ltd | Heat exchanger |
JP3650358B2 (en) * | 2001-11-09 | 2005-05-18 | 東芝キヤリア株式会社 | Air conditioner |
JP4055449B2 (en) * | 2002-03-27 | 2008-03-05 | 三菱電機株式会社 | Heat exchanger and air conditioner using the same |
JP2010078287A (en) * | 2008-09-29 | 2010-04-08 | Mitsubishi Electric Corp | Air conditioner |
CN102177118A (en) * | 2008-10-10 | 2011-09-07 | 纳幕尔杜邦公司 | Compositions comprising 2,3,3,3-tetrafluoropropene, 2-chloro-2,3,3,3-tetrafluoropropanol, 2-chloro-2,3,3,3-tetrafluoro-propyl acetate or zinc (2-chloro-2,3,3,3-tetrafluoropropoxy) chloride |
JP5195709B2 (en) * | 2009-10-05 | 2013-05-15 | ダイキン工業株式会社 | Heat exchanger and manufacturing method thereof |
ES2544842T3 (en) * | 2011-01-21 | 2015-09-04 | Daikin Industries, Ltd. | Heat exchanger and air conditioner |
JP5163763B2 (en) * | 2011-02-23 | 2013-03-13 | ダイキン工業株式会社 | Air conditioner heat exchanger |
DE112012002154B4 (en) * | 2011-05-19 | 2022-06-30 | AGC Inc. | Working medium and its use in a heat cycle process system |
JP2013083419A (en) * | 2011-09-30 | 2013-05-09 | Daikin Industries Ltd | Heat exchanger and air conditioner |
JP6045204B2 (en) * | 2012-06-06 | 2016-12-14 | 三菱重工業株式会社 | Heat exchange system |
JP6108332B2 (en) * | 2012-07-20 | 2017-04-05 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー(ホンコン)リミテッド | Air conditioner |
EP3032182B1 (en) * | 2013-09-11 | 2018-09-05 | Daikin Industries, Ltd. | Heat exchanger and air conditioner |
-
2014
- 2014-03-07 WO PCT/JP2014/056018 patent/WO2015132963A1/en active Application Filing
-
2015
- 2015-03-06 WO PCT/JP2015/056724 patent/WO2015133626A1/en active Application Filing
- 2015-03-06 JP JP2016506197A patent/JPWO2015133626A1/en active Pending
- 2015-03-06 EP EP15757924.4A patent/EP3128263B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP3128263A1 (en) | 2017-02-08 |
WO2015132963A1 (en) | 2015-09-11 |
WO2015133626A1 (en) | 2015-09-11 |
JPWO2015133626A1 (en) | 2017-04-06 |
EP3128263A4 (en) | 2018-01-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3128263B1 (en) | Heat exchanger and air conditioner | |
US9651317B2 (en) | Heat exchanger and air conditioner | |
EP3205967B1 (en) | Heat exchanger and air conditioning device | |
EP3009771B1 (en) | Air-conditioning device | |
US10309701B2 (en) | Heat exchanger and air conditioner | |
US10712104B2 (en) | Heat exchanger and refrigeration cycle apparatus | |
EP3205968B1 (en) | Heat exchanger and air conditioning device | |
EP2674717A1 (en) | Heat exchanger for air conditioner | |
WO2015111220A1 (en) | Heat exchanger and air conditioning device | |
WO2016121115A1 (en) | Heat exchanger and refrigeration cycle device | |
EP3156752B1 (en) | Heat exchanger | |
JP6230769B1 (en) | Heat exchanger | |
JP6198976B2 (en) | Heat exchanger and refrigeration cycle apparatus | |
EP3734190A1 (en) | Heat exchanger and refrigeration cycle device | |
EP4083558A1 (en) | Heat exchanger and refrigeration cycle device | |
US11415371B2 (en) | Heat exchanger and refrigeration apparatus | |
JP6415597B2 (en) | Refrigeration cycle equipment | |
CN113614481A (en) | Heat exchanger and air conditioner | |
JP7154427B2 (en) | heat exchangers and air conditioners | |
EP4382831A1 (en) | Refrigeration cycle device | |
JP6537868B2 (en) | Heat exchanger | |
CN110500665B (en) | Heat exchanger, air conditioner and air conditioning system | |
JP7146077B2 (en) | heat exchangers and air conditioners | |
KR102434570B1 (en) | Heat exchangers, outdoor units and refrigeration cycle units | |
JP7106814B2 (en) | Heat exchanger |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20160930 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20171211 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F25B 39/04 20060101AFI20171205BHEP Ipc: F28F 1/32 20060101ALI20171205BHEP Ipc: F28D 1/047 20060101ALI20171205BHEP Ipc: F28D 1/04 20060101ALI20171205BHEP Ipc: F25B 39/02 20060101ALI20171205BHEP Ipc: F28F 9/26 20060101ALI20171205BHEP |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F28D 1/047 20060101ALI20200903BHEP Ipc: F28D 1/04 20060101ALI20200903BHEP Ipc: F25B 39/02 20060101ALI20200903BHEP Ipc: F28F 1/32 20060101ALI20200903BHEP Ipc: F28F 9/26 20060101ALI20200903BHEP Ipc: F25B 39/04 20060101AFI20200903BHEP |
|
INTG | Intention to grant announced |
Effective date: 20201005 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602015064964 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1356757 Country of ref document: AT Kind code of ref document: T Effective date: 20210215 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20210120 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1356757 Country of ref document: AT Kind code of ref document: T Effective date: 20210120 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210520 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210420 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210420 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210520 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602015064964 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20210331 |
|
26N | No opposition filed |
Effective date: 20211021 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210331 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210331 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210306 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210306 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20211001 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210520 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20150306 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230512 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 746 Effective date: 20240327 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210120 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20240201 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20240213 Year of fee payment: 10 |