WO2017175702A1 - Échangeur de chaleur intérieur - Google Patents

Échangeur de chaleur intérieur Download PDF

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Publication number
WO2017175702A1
WO2017175702A1 PCT/JP2017/013908 JP2017013908W WO2017175702A1 WO 2017175702 A1 WO2017175702 A1 WO 2017175702A1 JP 2017013908 W JP2017013908 W JP 2017013908W WO 2017175702 A1 WO2017175702 A1 WO 2017175702A1
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WO
WIPO (PCT)
Prior art keywords
flat tube
indoor
heat exchanger
heat transfer
heat exchange
Prior art date
Application number
PCT/JP2017/013908
Other languages
English (en)
Japanese (ja)
Inventor
俊 吉岡
祥志 松本
智嗣 井上
Original Assignee
ダイキン工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to EP17779080.5A priority Critical patent/EP3441683B1/fr
Priority to US16/091,440 priority patent/US20190170372A1/en
Priority to CN201780020896.1A priority patent/CN108885015A/zh
Priority to AU2017247746A priority patent/AU2017247746B2/en
Priority to ES17779080T priority patent/ES2793474T3/es
Publication of WO2017175702A1 publication Critical patent/WO2017175702A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0067—Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—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
    • F28D1/0471—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 non-circular cross-section
    • 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
    • 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
    • F28F1/325—Fins with openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • 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
    • F28F2215/12—Fins with U-shaped slots for laterally inserting conduits

Definitions

  • the present invention relates to an indoor heat exchanger, and more particularly to an indoor heat exchanger used for heat exchange between indoor air and a refrigerant.
  • Patent Document 2 International Publication No. 13/160957 pamphlet
  • Patent Document 2 describes a heat exchanger using a flat tube instead of a cylindrical heat transfer tube. Yes.
  • the ventilation resistance is suppressed by using the flat tube.
  • An object of the present invention is to provide an indoor heat exchanger in which an increase in ventilation resistance is suppressed and drainage of condensed water is easy.
  • the indoor heat exchanger includes a plurality of first flat tubes arranged in a plurality of stages and a plurality of first heat transfer fins intersecting the first flat tubes, and flows in the width direction of the first flat tubes.
  • a first heat exchange unit that exchanges heat between the indoor air and the refrigerant that flows in the first flat tube, and a plurality of second heat exchangers that intersect the second flat tube and the second flat tube arranged in a plurality of stages.
  • a first heat transfer fin having a fin and a second heat exchanging part that exchanges heat between the indoor air flowing in the width direction of the second flat tube and the refrigerant flowing in the second flat tube
  • the second heat transfer fin include a windward main portion where a notch into which the first flat tube and the second flat tube are inserted is formed, and a leeward communication portion located on the opposite side of the opening end of the notch.
  • the first heat exchange part and the second heat exchange part have the first flat tube and the second flat tube in each stage installed in the width direction, and the windward side is the inner peripheral side. Leeward side is bent so that the outer peripheral side.
  • the cutouts of the first heat transfer fin and the second heat transfer fin are arranged inside, and the first flat tube and the second flat tube are bent inward. Therefore, deformation of the main part of the first heat transfer fin and the main part of the second heat transfer fin is suppressed. Since the communicating portion of the first heat transfer fin and the second heat transfer fin is disposed on the leeward side, the condensed water carried by the indoor air flowing in the width direction of the first flat tube and the second flat tube is directed upward and downward. It can be made to flow through the communication part.
  • the indoor heat exchanger according to the second aspect of the present invention is the indoor heat exchanger according to the first aspect, wherein the first heat exchange part and the second heat exchange part are bent so as to surround the indoor fan on the inner peripheral side, The indoor air blown out from the indoor fan disposed on the inner peripheral side is moved between the fins of the plurality of first heat transfer fins along the width direction of the first flat tube and the second flat tube. It arrange
  • the indoor air blown out from the indoor fan surrounded by the inner peripheral sides of the first heat exchanging part and the second heat exchanging part is converted into the first flatness having a small ventilation resistance. It can be made to blow in the width direction of a pipe and the 2nd flat tube, and condensed water can be conveyed over the whole indoor heat exchanger from the inner circumference side to the outer circumference side of the 1st heat exchange part and the 2nd heat exchange part.
  • the indoor heat exchanger according to the third aspect of the present invention is the indoor heat exchanger according to the first aspect or the second aspect, wherein the plurality of first flat tubes are 0 mm from the windward edge of the plurality of first heat transfer fins. As described above, they are arranged on the windward side.
  • the first flat tube is located at the windward side of 0 mm or more from the windward edge of the plurality of first heat transfer fins, for example, the first heat exchange.
  • the first flat tube protruding to the leeward side by 0 mm or more from the windward edge of the first heat transfer fin when the part and the second heat exchange part are bent hits the member etc. first, for example, the plurality of first heat transfer fins Upwind edge buckling is prevented.
  • An indoor heat exchanger is the indoor heat exchanger according to the third aspect, wherein the plurality of first flat tubes and the plurality of second flat tubes are of the windward portion located on the windward side.
  • the wall thickness of the tube wall is thicker than the wall thickness of the side wall portion located in the step direction of the first flat tube and the second flat tube.
  • the wall thickness of the windward portion located on the windward side is thick, when bending the first flat tube and the second flat tube with a jig, Even if the jig is damaged, it is possible to suppress a decrease in the pressure strength.
  • An indoor heat exchanger is the indoor heat exchanger according to any one of the first to fourth aspects, wherein the first heat exchange unit is a plurality of first heat transfer units of the first heat exchange unit.
  • a gap is formed between the leeward edge of the fin and the main part on the windward side of the second heat transfer fin of the second heat exchanging part so as not to contact the second heat exchanging part.
  • the indoor heat exchanger which concerns on the 5th viewpoint of this invention, it is comprised so that a 1st heat exchange part and a 2nd heat exchange part may not contact, and the 1st heat exchange part and 2nd with a temperature difference are comprised. It is possible to suppress heat conduction from one of the heat exchange units to the other.
  • the indoor heat exchanger according to a sixth aspect of the present invention is the indoor heat exchanger according to the fifth aspect, wherein the second flat tube is located at an upstream of 0 mm or more from the windward edge of the plurality of second heat transfer fins. Are arranged.
  • the second flat tube is located on the windward side by 0 mm or more from the windward edge of the plurality of second heat transfer fins, It becomes easy to maintain the clearance gap between 2nd heat exchange parts.
  • the indoor heat exchanger according to a seventh aspect of the present invention is the indoor heat exchanger according to the sixth aspect, wherein the second flat tube is located 2 mm or less above the windward edge of the plurality of second heat transfer fins. It is what is arranged.
  • the second flat tube is positioned on the windward side by 2 mm or less from the windward edge of the plurality of second heat transfer fins. Condensed water is attracted by the surface tension in a gap of 2 mm or less formed between the second heat exchange part and the second heat exchange part, so that it easily flows down.
  • An indoor heat exchanger is the indoor heat exchanger according to any one of the fifth to seventh aspects, wherein the first heat exchanging section has gaps between the leeward edges of the plurality of first heat transfer fins. It extends in the vertical direction along a straight line.
  • the leeward edges of the plurality of first heat transfer fins extend linearly along the gap in the vertical direction, so that the condensed water can be easily guided along the leeward edge.
  • An indoor heat exchanger is the indoor heat exchanger according to any one of the fifth to eighth aspects, wherein the first heat exchange part and the second heat exchange part are the first flat tube and the first heat exchange part. 2 It is bent into an L shape, a C shape or a square shape when viewed from the step direction of the flat tube.
  • the first heat exchange section and the second heat exchange section are bent into an L shape, a C shape, or a square shape.
  • One pair or two pairs of the part and the second heat exchange part can surround the space on the windward side.
  • an increase in ventilation resistance is suppressed, and drainage at the time of dew condensation is improved by the communication part on the leeward side.
  • the indoor heat exchanger According to the second aspect of the present invention, it is possible to improve the drainage of the condensed water by efficiently utilizing the air flow blown around by the indoor fan.
  • the indoor heat exchanger according to the third aspect of the present invention, it is possible to suppress an increase in ventilation resistance due to deformation of the windward edges of the plurality of first heat transfer fins.
  • the drainage performance of condensed water is improved.
  • the indoor heat exchanger according to the eighth aspect of the present invention it is possible to suppress the occurrence of problems due to condensed water, such as scattering of condensed water.
  • the configuration of the apparatus to which the indoor heat exchanger is applied can be simplified.
  • the perspective view which shows the external appearance of the indoor unit which concerns on embodiment.
  • Sectional drawing of the indoor unit of FIG. The typical top view of an indoor heat exchanger.
  • Sectional drawing which shows the indoor heat exchanger of the place of the II line
  • the partial expanded sectional view which shows an example of the relationship between a 1st flat tube, a 2nd flat tube, and a notch.
  • the schematic diagram which shows an example of the manufacturing process of an indoor heat exchanger.
  • the schematic diagram which shows an example of the other manufacturing process of an indoor heat exchanger.
  • Sectional drawing which shows typically the relationship between the component of an indoor heat exchanger, and a jig
  • FIG. 1 shows an appearance of an indoor unit to which an indoor heat exchanger according to an embodiment of the present invention is applied
  • FIG. 2 shows the indoor unit of FIG.
  • the indoor unit 100 is a ceiling-mounted indoor unit that is used for cooling and heating a room in a building such as a building by performing a vapor compression refrigeration cycle operation.
  • the indoor unit 100 is embedded in a ceiling CE of a room such as a building.
  • the indoor unit 100 includes an indoor fan 120 and an indoor heat exchanger 10.
  • the indoor fan 120 is driven, the indoor unit 100 sucks indoor air from the suction port 101 in the lower center of the indoor unit 100 and blows out air from the four outlets 102 of the indoor unit 100.
  • the four outlets 102 of the indoor unit 100 extend in parallel to the four sides of the decorative plate 103 having a substantially square bottom surface.
  • a bell mouth 104 is attached immediately above the suction port 101.
  • the indoor air sucked from the suction port 101 is guided to the indoor fan 120 by the bell mouth 104.
  • room air is blown out substantially parallel to the ceiling CE.
  • the indoor air that passes through the indoor heat exchanger 10 that surrounds the indoor fan 120 in the horizontal direction and is blown out from the indoor fan 120 is blown out from the four outlets 102 on the outer periphery of the indoor heat exchanger 10.
  • condensation may occur when the temperature of the indoor heat exchanger 10 is lower than the indoor temperature during cooling operation.
  • a drain pan 130 is provided below the indoor heat exchanger 10 in order to receive condensed water generated by condensation in the indoor heat exchanger 10.
  • the condensed water generated in the indoor heat exchanger 10 is attracted by gravity, flows downward through the indoor heat exchanger 10, and falls from the indoor heat exchanger 10 to the drain pan 130.
  • FIG. 3 The state which looked at the indoor heat exchanger 10 from the top is shown by FIG. As illustrated in FIG. 3, the indoor heat exchanger 10 surrounds the indoor fan 120.
  • the arrows Ar1, Ar2, Ar3, Ar4 in FIG. 3 indicate the direction of air flow. Further, four outlets 102 are formed in the direction of these arrows Ar1 to Ar4.
  • the indoor heat exchanger 10 has a shape along each side of a square having a center of a diagonal line at the center of the indoor fan 120 as viewed from above. However, the location corresponding to the location where the drain pump 140 is formed is recessed on the inner peripheral side.
  • the indoor heat exchanger 10 is, for example, a part of a refrigerant circuit (not shown) that performs a refrigeration cycle and performs heat exchange between refrigerant flowing through the refrigerant circuit and room air.
  • a liquid pipe 51 and a gas pipe 52 extending from the indoor heat exchanger 10 are connected to the refrigerant circuit.
  • a liquid refrigerant mainly flows through the liquid pipe 51 extending from the indoor heat exchanger 10, and a gas refrigerant mainly flows through the gas pipe 52.
  • FIG. 4 shows an enlarged cross-sectional structure of a part of the indoor unit 100 cut at a location corresponding to the location of line II in FIG.
  • the indoor heat exchanger 10 includes a first heat exchange unit 11 on the inner peripheral side and a second heat exchange unit 12 on the outer peripheral side.
  • the first heat exchange unit 11 is disposed on the leeward side
  • the second heat exchange unit 12 is disposed on the leeward side.
  • the first heat exchange unit 11 includes a plurality of first flat tubes 21 arranged in a plurality of stages and a plurality of first heat transfer fins 31 intersecting with the plurality of first flat tubes 21.
  • the first flat tube 21 and the first heat transfer fin 31 are substantially orthogonal to each other. Although the number of the first heat transfer fins 31 shown in FIG. 4 is only one, the other first heat transfer fins 31 adjacent to the first heat transfer fins 31 shown in FIG. The first heat transfer fins 31 are arranged in parallel. However, the first heat transfer fins 31 adjacent to each other at the bent portion 10R of the indoor heat exchanger 10 are not parallel to each other, and the outer periphery is larger than the interval on the inner peripheral side of the first heat transfer fins 31 adjacent to each other. The side spacing is widened. In one first flat tube 21, a plurality of flow paths 21a are formed in a line from the windward side to the leeward side, and the refrigerant flows through each flow path 21a.
  • the second heat exchanging unit 12 includes a plurality of second flat tubes 22 arranged in a plurality of stages and a plurality of second heat transfer fins 32 intersecting with the plurality of second flat tubes 22.
  • the second flat tube 22 and the second heat transfer fin 32 are substantially orthogonal to each other.
  • the number of the second heat transfer fins 32 shown in FIG. 4 is only one, the other second heat transfer fins 32 adjacent to the second heat transfer fins 32 shown in FIG.
  • the second heat transfer fins 32 are arranged in parallel.
  • the second heat transfer fins 32 adjacent to each other at the bent portion 10 ⁇ / b> R of the indoor heat exchanger 10 are not parallel to each other, and the outer periphery is larger than the interval on the inner peripheral side of the adjacent second heat transfer fins 32.
  • the side spacing is widened.
  • a plurality of flow paths 22a are formed in a line from the windward side to the leeward side, and the refrigerant flows through each flow path 22a.
  • FIG. 5 schematically shows an example of the flow direction of the refrigerant flowing through the indoor heat exchanger 10.
  • the indoor heat exchanger 10 includes a flow divider 53 connected to the liquid pipe 51, a liquid header 54 connected to the flow divider 53, a gas header 55 connected to the gas pipe 52, and a turn-up header 56. .
  • the indoor heat exchanger 10 shown in FIGS. 3 and 5 is configured by using two sets of first heat exchange units 11 and second heat exchange units 12.
  • the one arranged near the drain pump 140 is called the first heat exchange unit 11 and the second heat exchange unit 12 or the first pair P1 of the first pair P1, and the remaining one is the first heat of the second pair P2. It is called the exchange unit 11 and the second heat exchange unit 12 or the second pair P2.
  • FIG. 5 shows the flow of the refrigerant when the indoor heat exchanger 10 functions as an evaporator by arrows Ar5 to Ar8.
  • the liquid refrigerant that has flowed from the liquid pipe 51 into the first flat tube 21 via the flow divider 53 and the liquid header 54 flows in the direction of the arrow Ar5.
  • the refrigerant flowing through the first flat pipe 21 of the first pair P1 enters the second flat pipe 22 from the first flat pipe 21 at the turn-back header 56, flows in the direction of the arrow Ar6, and passes through the gas header 55 to the gas pipe. It flows to 52.
  • the liquid refrigerant that has flowed from the liquid pipe 51 into the first flat tube 21 via the flow divider 53 and the liquid header 54 flows in the direction of the arrow Ar7.
  • the refrigerant flowing through the first flat tube 21 of the second pair P2 enters the second flat tube 22 from the first flat tube 21 at the turn-up header 56, flows in the direction of the arrow Ar8, and passes through the gas header 55 to the gas pipe. It flows to 52.
  • the indoor heat exchanger 10 shown in FIG. 5 the liquid refrigerant evaporates while flowing through the first flat tube 21 and the second flat tube 22 and changes to a gas refrigerant.
  • the first heat exchange unit 11 and the second heat exchange unit 12 are combined. Note that the first pair P1 has two bent portions 10R, and the second pair P2 has only one bent portion 10R, but both shapes are classified as L-shaped.
  • the first pair P1 and the second pair P2 are bent in an L shape so that the first heat exchange unit 11 and the second heat exchange unit 12 surround the indoor fan 120 on the inner peripheral side. To be able to do that.
  • the indoor air blown from the indoor fan 120 arranged on the inner peripheral side is passed through the first flat tube 21 and the second flat tube 22 along the width direction. It arrange
  • FIG. 6 shows the first heat transfer fin 31 of the first heat exchange section 11 shown in FIG. 4 and a part of the first flat tube 21 fitted therein. It is shown further enlarged. Note that the structure of the first heat exchange unit 11 shown enlarged in FIG. 6 is also common to the second heat exchange unit 12, and therefore, the first heat exchange unit 11 will be described here and the second heat exchange unit 11 will be described. The description of the same configuration as the first heat exchange unit 11 in the exchange unit 12 is omitted.
  • the first heat transfer fin 31 includes a windward main part 33 in which a notch 35 into which the first flat tube 21 is inserted is formed, and a leeward communication part 34 located on the opposite side of the opening end 35 a of the notch 35.
  • the first flat tube 21 is inserted in the direction of the arrow Ar9 in FIG.
  • the second heat transfer fin 32 is connected to the leeward side main portion 33 in which the notch 35 into which the second flat tube 22 is inserted and the leeward side communication located on the opposite side of the opening end 35a of the notch 35.
  • Part 34 is provided.
  • the communication portion 34 is formed with water guiding ribs 36 that help drain the condensed water.
  • the water guide ribs 36 are portions extending from the pressed grooves.
  • the convex structure When the water guide ribs 36 are viewed from the one main surface f1 of the first heat transfer fins 31 (or the second heat transfer fins 32), the convex structure has the water guide ribs 36. When viewed from the other main surface on the opposite side of the one main surface f1, the concave structure extends vertically along the water guiding rib 36.
  • a plurality of cut-and-raised portions 37 protruding in a bridge shape are formed on the one main surface f1 side of the first heat transfer fin 31 (or the second heat transfer fin 32). As can be seen from FIG. 6, the cut-and-raised portion 37 is not formed around the notch 35.
  • the pressing jig 220 is pressed against the component 300 from the side opposite to the roll portion 211 of the roll jig 210. Further, the pressing jig 220 presses the portion closer to the other end 302 of the component 300 than the roll portion 211.
  • the first flat tube 21 and the second flat tube 22 of the component 300 are bent by applying a force from the pressing jig 220 to the component 300 of the indoor heat exchanger 10.
  • the radius of curvature of the second flat tube 22 is larger than the radius of curvature of the first flat tube 21. Accordingly, when the bending process is completed, the end of the first flat tube 21 and the end of the second flat tube 22 at the other end 302 of the component 300 are shown in FIG.
  • the end of the second flat tube 22 is designed to protrude beyond the end of the first flat tube 21 before the component 300 is bent.
  • FIG. 9 shows an enlarged view of the part 300 where the roll jig 210 and the pressing jig 220 are pressed.
  • the first flat tube 21 mainly contacts the roll jig 210.
  • a plate is inserted between the first heat exchange unit 11 and the second heat exchange unit 12 during the bending process when completed.
  • the second flat tube 22 transmits the force from the second flat tube 22 to the first heat transfer fins 31 through the plate.
  • the area where the pressing jig 220 contacts the second heat transfer fin 32 also has a wide area.
  • the pressure received by the second heat transfer fin 32 from the pressing jig 220 and the pressure received by the first heat transfer fin 31 from the plate are smaller than the pressure received by the first flat tube 21 from the roll jig 210.
  • buckling of the leeward edge 31b of the first heat transfer fin 31 and the leeward edge 32b (see FIG. 11) of the second heat transfer fin 32 during bending is prevented.
  • the plurality of first flat tubes 21 are 0 mm from the windward edges 31 a of the plurality of first heat transfer fins 31. As described above, they are arranged on the windward side. That is, the distance D1 between the windward end of the first flat tube 21 and the windward edge 31a of the first heat transfer fin 31 shown in FIG. 6 is 0 mm or more, and there is a manufacturing error, for example. Considering this, the distance D1 is preferably set to 0.5 mm or more. As already described, in order to reduce the force applied to the first heat transfer fins 31 during bending, it is preferable that the first flat tube 21 protrudes.
  • the wall thickness of the tube wall of the 1st flat tube 21 and the 2nd flat tube 22 is set in consideration of the force which these apply. Specifically, as shown in FIG. 10, the first flat tube 21 and the second flat tube 22 have the wall thickness t3 of the tube walls 21d and 22d in the windward portion located on the windward side. It is thicker than the wall thickness t ⁇ b> 2 of the tube walls 21 c and 22 c at the side portions located in the step direction of the flat tube 21 and the second flat tube 22.
  • the wall thickness t3 of the tube walls 21d and 22d in the windward portion located on the windward side than the wall thickness t1 of the inner walls 21b and 22b that divide the flow paths of the first flat tube 21 and the second flat tube 22 with multiple holes. Is thicker.
  • FIG. 11 shows a part of the first heat exchange unit 11 and the second heat exchange unit 12 in an enlarged manner.
  • the first heat exchanging portion 11 has a gap CL formed between the leeward edge 31b of the first heat transfer fin 31 and the main portion 33 on the upwind side of the second heat transfer fin 32 of the second heat exchange portion 12. 2. It is comprised so that it may not contact with the heat exchange part 12.
  • the distance D3 between the leeward edge 31b of the first heat transfer fin 31 and the windward edge 32a of the second heat transfer fin 32 is preferably ensured by 2 mm or less.
  • the plurality of second flat tubes 22 are arranged on the windward side by 0 mm or more from the windward edge 32 a of the plurality of second heat transfer fins 32. That is, the distance D2 between the windward end of the second flat tube 22 and the windward edge 32a of the second heat transfer fin 32 shown in FIG. 6 is 0 mm or more, and the condensed water has surface tension. Is preferably set to 2 mm or less in order to make it easy to flow down. This 2 mm takes into account the size of the water droplets. If this is 2 mm or more, the water droplets are hardly attracted by surface tension (capillary phenomenon).
  • the second flat tubes 22 are projected (the second flat tubes 22 are windward of the second heat transfer fins 32). It is preferable that the edge 32a protrudes more than 0 mm and is located on the windward side.
  • the indoor heat exchanger 10 combines the first pair P1 and the second pair bent in an L shape when viewed from the step direction of the first flat tube 21 and the second flat tube 22,
  • the case where it is configured to surround the entire circumference of the windward space where the fan 120 is arranged has been described as an example.
  • the shape of the indoor heat exchanger 10 for enclosing the windward space where the indoor fan 120 is disposed is, for example, as shown in FIG. 12 or FIG. 12 when viewed from the step direction of the first flat tube 21 and the second flat tube 22. It may be a square shape as shown in FIG.
  • FIG. 12 shows the flow of the refrigerant when the square indoor heat exchanger 10 functions as an evaporator by arrows Ar11 and Ar12.
  • the refrigerant flowing through the first flat tube 21 enters the second flat tube 22 from the first flat tube 21 at the folding header 56, flows in the direction of the arrow Ar 12, and flows to the gas pipe 52 via the gas header 55.
  • FIG. 13 shows the flow of the refrigerant when the square indoor heat exchanger 10 functions as an evaporator.
  • the refrigerant flows in the first flat tube 21 of the first heat exchange unit 11 with arrows Ar12 and Ar14 and second heat exchange.
  • the second flat tube 22 of the portion 12 is indicated by arrows Ar13 and Ar15.
  • the liquid refrigerant flowing from the liquid pipe 51 into the first flat tube 21 via the flow divider 53 and the liquid header 54 is indicated by the arrows Ar12. It flows in the direction of Ar13.
  • the refrigerant flowing through the first flat tube 21 flows in the directions of arrows Ar14 and Ar15, and flows to the gas pipe 52 via the gas header 55.
  • FIG. 14 shows the internal structure of the indoor unit 100 as viewed from below
  • FIG. 15 shows a cross-sectional structure taken along line II-II in FIG.
  • the indoor unit 100 includes an indoor fan 120 and an indoor heat exchanger 10.
  • the C-shaped indoor heat exchanger 10 is a portion indicated by hatching.
  • the indoor fan 120 When the indoor fan 120 is driven, the indoor unit 100 sucks room air from the suction port 101 in the lower center of the indoor unit 100 and blows air from the outlet 102 of the indoor unit 100.
  • a bell mouth 104 is attached immediately above the suction port 101.
  • the indoor air sucked from the suction port 101 is guided to the indoor fan 120 by the bell mouth 104.
  • the indoor fan 120 substantially blows out indoor air in the horizontal direction.
  • the indoor air which passed the indoor heat exchanger 10 which encloses the indoor fan 120 in a C shape in a horizontal direction, and was blown off from the indoor fan 120 is blown off from the blower outlet 102.
  • condensation may occur when the temperature of the indoor heat exchanger 10 is lower than the indoor temperature during cooling operation.
  • a drain pan 130 is provided below the indoor heat exchanger 10 in order to receive condensed water generated in the indoor heat exchanger 10.
  • the condensed water generated in the indoor heat exchanger 10 is attracted by gravity, flows downward through the indoor heat exchanger 10, and falls from the indoor heat exchanger 10 to the drain pan 130.
  • the refrigerant flowing through the first flat tube 21 and the second flat tube 22 of the above embodiment may be other than a vapor compressor type refrigerant, for example, water.
  • the heat exchange unit has two rows of the first heat exchange unit 11 and the second heat exchange unit 12, but the present invention can also be applied to an indoor heat exchanger having three or more rows.
  • the indoor heat exchanger according to the present invention can be applied not only to the ceiling-embedded indoor unit 100 but also to, for example, a ceiling-suspended indoor unit.
  • the notches 35 of the first heat transfer fins 31 and the second heat transfer fins 32 are arranged on the inner side, and the first flat tube 21 and the second flat tube 22 are bent inward. Deformation of the main portion 33 of the first heat transfer fin 31 and the main portion 33 of the second heat transfer fin 32 is suppressed. The deformation of the main portion 33 of the first heat transfer fin 31 and the main portion 33 of the second heat transfer fin 32 is suppressed, and the ventilation resistance is not increased by the deformation, and the increase of the ventilation resistance is suppressed.
  • the communication part 34 of the 1st heat transfer fin 31 and the 2nd heat transfer fin 32 is arrange
  • the condensed water can be made to flow in the up and down direction through the communicating portion 34, particularly the water guiding rib 36.
  • the drainage property at the time of dew condensation improves by the communicating part 34 of the 1st flat tube 21 and the 2nd flat tube 22 in the leeward side.
  • the indoor heat exchanger 10 has the first pair P ⁇ b> 1 and the second pair P ⁇ b> 2 bent into an L shape so that the indoor fan 120 can be enclosed on the inner peripheral side.
  • the indoor heat exchanger 10 shown by FIG.12 and FIG.13 is bent by the square shape so that the indoor fan 120 can be enclosed on the inner peripheral side.
  • the indoor heat exchanger 10 shown in FIG. 14 is bent in a C shape so that the indoor fan 120 can be enclosed on the inner peripheral side.
  • drainage of the condensed water is improved by efficiently utilizing the air flow blown out by the indoor fan 120.
  • the first flat tubes 21 are positioned at the windward side of 0 mm or more from the windward edges 31 a of the plurality of first heat transfer fins 31, for example, the first heat exchange unit 11 and When the second heat exchanging portion 12 is bent, the first flat tube 21 protruding to the leeward side by 0 mm or more from the windward edge 31a of the first heat transfer fin 31 hits a member such as the roll jig 210 first, The buckling of the windward edge 31a of the first heat transfer fin 31 is prevented. As a result, an increase in ventilation resistance due to deformation of the windward edges 31a of the plurality of first heat transfer fins 31 can be suppressed.
  • a gap CL is formed between the leeward edge 31b of the first heat transfer fin 31 and the windward main portion 33 of the second heat transfer fin 32 shown in FIG.
  • the second flat tubes 22 are positioned at the windward side of 0 mm or more from the windward edges 32 a of the plurality of second heat transfer fins 32, so that the first heat exchange unit 11 and the second heat exchange unit 11 It becomes easy to maintain the clearance CL between the heat exchange parts 12.
  • the clearance CL maintained by this arrangement of the second flat tubes 22 makes it easy to prevent the performance of heat exchange between the first heat exchange unit 11 and the second heat exchange unit 12 from being deteriorated.
  • the second flat tube 22 is located 2 mm or less above the windward edge of the plurality of second heat transfer fins, so that the first heat exchange unit 11 and the second heat A gap CL of 2 mm or less can be reliably formed between the exchange parts 12. That is, the distance D3 between the leeward edge 31b of the first heat transfer fin 31 and the windward edge 32a of the second heat transfer fin 32 is 2 mm or less. Condensed water is attracted by the surface tension in a gap of 2 mm or less formed between the first heat exchange unit 11 and the second heat exchange unit 12 and easily flows down. As a result, the drainage performance of the condensed water in the indoor heat exchanger 10 is improved.
  • the leeward edges 31b of the plurality of first heat transfer fins 31 extend linearly along the gap CL in the vertical direction, so that the condensed water can be easily guided along the leeward edge 31b. As a result, it is possible to suppress the occurrence of problems due to condensed water, such as scattering of condensed water.
  • the first heat exchanging part 11 and the second heat exchanging part 12 are two sets of L-shaped first pair P1 and second pair P2, and the square type 1 shown in FIGS.
  • the windward space in the first heat exchange section 11 and the second heat exchange section 12 in the set or in the one set of the first heat exchange section and the second heat exchange section in the C shape shown in FIG. Can be enclosed.
  • the configuration of the indoor unit 100 to which the indoor heat exchanger 10 is applied can be simplified.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Abstract

L'invention concerne un échangeur de chaleur intérieur qui peut commander des augmentations de résistance à l'écoulement d'air et qui peut facilement faire sortir de l'eau de condensat. Une première ailette de transfert de chaleur (31) et une seconde ailette de transfert de chaleur (32) comportent chacune : une partie principale (33) sur le côté au vent dans laquelle une encoche (35) pour introduire un premier tube plat (21) et un second tube plat (22) est formée ; et une partie de communication (34) sur le côté sous le vent qui est positionnée sur le côté opposé à l'extrémité ouverte de l'encoche (35). Une première unité d'échange de chaleur (11) et une seconde unité d'échange de chaleur (12) ont chaque niveau du premier tube plat (21) et du second tube plat (22) installé dans le sens de la largeur, les tubes étant pliés de telle sorte que le côté au vent se trouve sur le côté circonférentiel intérieur et que le côté sous le vent se trouve sur le côté circonférentiel extérieur.
PCT/JP2017/013908 2016-04-07 2017-04-03 Échangeur de chaleur intérieur WO2017175702A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP17779080.5A EP3441683B1 (fr) 2016-04-07 2017-04-03 Échangeur de chaleur intérieur
US16/091,440 US20190170372A1 (en) 2016-04-07 2017-04-03 Indoor heat exchanger
CN201780020896.1A CN108885015A (zh) 2016-04-07 2017-04-03 室内热交换器
AU2017247746A AU2017247746B2 (en) 2016-04-07 2017-04-03 Indoor heat exchanger
ES17779080T ES2793474T3 (es) 2016-04-07 2017-04-03 Intercambiador de calor interior

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016077262A JP6380449B2 (ja) 2016-04-07 2016-04-07 室内熱交換器
JP2016-077262 2016-04-07

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WO2017175702A1 true WO2017175702A1 (fr) 2017-10-12

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US (1) US20190170372A1 (fr)
EP (1) EP3441683B1 (fr)
JP (1) JP6380449B2 (fr)
CN (1) CN108885015A (fr)
AU (1) AU2017247746B2 (fr)
ES (1) ES2793474T3 (fr)
WO (1) WO2017175702A1 (fr)

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JP6897372B2 (ja) * 2017-07-03 2021-06-30 ダイキン工業株式会社 熱交換器
JP7092987B2 (ja) * 2018-01-22 2022-06-29 ダイキン工業株式会社 室内熱交換器および空気調和装置
JP2019215117A (ja) * 2018-06-12 2019-12-19 ダイキン工業株式会社 室内熱交換器及び空気調和装置
KR20200078936A (ko) * 2018-12-24 2020-07-02 삼성전자주식회사 열 교환기
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EP3441683B1 (fr) 2020-03-04
JP6380449B2 (ja) 2018-08-29
ES2793474T3 (es) 2020-11-16
JP2017187243A (ja) 2017-10-12
AU2017247746B2 (en) 2018-12-06
US20190170372A1 (en) 2019-06-06
EP3441683A4 (fr) 2019-04-17
AU2017247746A1 (en) 2018-11-29
CN108885015A (zh) 2018-11-23
EP3441683A1 (fr) 2019-02-13

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