WO2023190378A1 - Heat exchanger and indoor unit - Google Patents

Heat exchanger and indoor unit Download PDF

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Publication number
WO2023190378A1
WO2023190378A1 PCT/JP2023/012276 JP2023012276W WO2023190378A1 WO 2023190378 A1 WO2023190378 A1 WO 2023190378A1 JP 2023012276 W JP2023012276 W JP 2023012276W WO 2023190378 A1 WO2023190378 A1 WO 2023190378A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
cut
fin collar
fin
point
Prior art date
Application number
PCT/JP2023/012276
Other languages
French (fr)
Japanese (ja)
Inventor
文 奥野
健 佐藤
起洋剛 豊山
Original Assignee
ダイキン工業株式会社
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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
Publication of WO2023190378A1 publication Critical patent/WO2023190378A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00Evaporators; Condensers
    • F25B39/02Evaporators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-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
    • F28D1/02Heat-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
    • F28D1/04Heat-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
    • F28D1/053Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular 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
    • F28F1/24Tubular 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
    • F28F1/30Tubular 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 being attachable to the element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular 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
    • F28F1/24Tubular 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
    • F28F1/32Tubular 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

Definitions

  • the present disclosure relates to a heat exchanger including heat exchanger tubes and fins, and an indoor unit including the heat exchanger.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 2013-221680 discloses a fin tube heat exchanger.
  • condensation water may form on the heat exchanger during heat exchange. Condensed water generated during heat exchange adheres to the surface of the fins, reducing heat exchange efficiency. In heat exchangers, improving the drainage of condensed water is an issue.
  • the condensed water that has accumulated between the heat exchanger tube and the cut-out part can be drained through a long, slender hole that extends straight from below the heat exchanger tube further downward in the vertical direction. Therefore, effective drainage cannot be achieved.
  • the condensed water that accumulates around the cut and raised portions causes ventilation resistance for the air flowing through the heat exchanger.
  • the heat exchanger according to the first aspect is a heat exchanger that includes fins, a first heat exchanger tube that passes through the fins and allows a heat medium to flow, and a second heat exchanger tube that is adjacent to the first heat exchanger tube in the vertical direction downward.
  • the fin includes a first fin collar that is in close contact with the first heat exchanger tube, a second fin collar that is in close contact with the second heat exchanger tube, a cut-and-raised part that is cut in the penetrating direction of the first heat exchanger tube, and provided on the fin surface. and a water guide portion that guides condensed water more easily than the surrounding fin surfaces.
  • the water guiding portion is disposed away from the first fin collar and extends in a direction toward the second fin collar, and is disposed in a first region where condensed water collects between the first fin collar and the cut-out portion. It has a first starting point, and has a first portion extending from the first starting point in a direction away from the cut and raised portion.
  • the condensed water accumulated in the first region can be guided away from the cut and raised parts by the water guide part so that the cut and raised parts are not blocked by condensed water, so that the airflow flowing along the fins is It is possible to suppress the increase in ventilation resistance caused by condensed water.
  • the heat exchanger of the second aspect is the heat exchanger of the first aspect
  • the cut-and-raised portion is the first cut-and-raised portion disposed between the first fin collar and the second fin collar.
  • the first region is a region surrounded by the first fin collar, the first cut and raised portion, the first line segment, and the second line segment.
  • the first cut-out portion extends along a first straight line passing through a first point of the first fin collar closest to the second fin collar and a second point of the second fin collar closest to the first fin collar. It has a first cutting line that is close to the first straight line and a second cutting line that is far from the first straight line.
  • the first line segment is a line segment connecting the first point and the midpoint of the first cutting line.
  • the second line segment is a line segment connecting the upper end point of the second cutting line and the third point.
  • the third point is a point in the first fin collar that is farthest from the first straight line and closest to the first notch.
  • the condensed water extends from the first starting point of the first region while separating the condensed water accumulated in the first region from the first cut and raised portion so that the first cut and raised portion is not blocked by condensed water. Since the water can be guided by the first portion of the water guide portion, it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins due to the condensed water.
  • the heat exchanger according to the third aspect is the heat exchanger according to the second aspect, and the fins are located at a fourth point in the first fin collar that is farthest from the first straight line and farthest from the first cutout. and the third point.
  • the water guiding portion has a second starting point in a second region surrounded by the first fin collar, the second cut and raised portion, the third line segment, and the fourth line segment, and has a second starting point from the second cut and raised portion. It has a second portion extending away from the second starting point.
  • the second cut-and-raised portion has a third cutting line that extends along the first straight line and is close to the first straight line.
  • the third line segment is a line segment connecting the first point and the lower end point of the third cutting line.
  • the fourth line segment is a line segment that connects the fourth point and the fifth point that is closest to the fourth point among the third cutting lines.
  • the condensed water extends from the second starting point of the second region while separating the condensed water accumulated in the second region from the second cut and raised portion so that the second cut and raised portion is not blocked by condensed water. Since the water can be guided by the second portion of the water guide portion, it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins due to the condensed water.
  • the heat exchanger according to the fourth aspect is the heat exchanger according to the second or third aspect, and the water guide portion has a structure in which fins are deformed into a convex shape.
  • the water guide portion can also be formed in the process of forming the fin collar, for example by press working, and the water guide portion can be formed at low cost.
  • the heat exchanger according to the fifth aspect is the heat exchanger according to the fourth aspect, and the portion deformed into a convex shape is a rib.
  • the water guide portion is a rib and has a continuous structure, it is easier to guide condensed water on both the front and back surfaces of the fins than on the fin surfaces around the ribs.
  • the heat exchanger according to the sixth aspect is the heat exchanger according to the fourth aspect or the fifth aspect, wherein the water guide part has a linear shape extending at an angle with respect to the first straight line, or a tangent line is the first straight line. It has a curved shape that extends obliquely to the surface.
  • the heat exchanger according to the sixth aspect by having a linear shape that is inclined with respect to the first straight line or a curved shape that extends so that the tangent line is inclined, the water conduction is convex compared to the case where the heat exchanger extends substantially parallel to the first straight line. It can reduce the ventilation resistance that occurs in the area.
  • the heat exchanger according to the seventh aspect is the heat exchanger according to any one of the fourth to sixth aspects, in which the water guide part is divided into two or bifurcated parts, the distance of which increases as the distance approaches the first fin collar. It has a shape.
  • the heat exchanger according to the eighth aspect is the heat exchanger according to any one of the fourth to seventh aspects, in which the water guiding part has a shape that directs the airflow from outside the range of the cut and raised part to within the range of the cut and raised part.
  • the airflow directed by the shape that directs the airflow from outside the range of the cut and raised part to within the range of the cut and raised part can improve the heat transfer performance by the cut and raised part.
  • the heat exchanger according to the ninth aspect is the heat exchanger according to any one of the fourth to seventh aspects, and the water guide portion has a portion shaped like a broken line.
  • the water guide portion shaped like a broken line has a discontinuous portion, it is possible to reduce ventilation resistance at this discontinuous portion.
  • the heat exchanger according to the tenth aspect is the heat exchanger according to any one of the first to ninth aspects, wherein the distance between the first fin collar and the cut portion is greater than 0 and equal to or less than 5 mm. .
  • the heat exchanger according to the eleventh aspect is the heat exchanger according to any one of the first to tenth aspects, and the water guide portion is located at a position farther from the cutout than the sixth point at the upper end of the second fin collar. Moreover, the end point is located at a position away from the second fin collar.
  • the indoor unit includes the heat exchanger according to any one of the first to eleventh aspects, a suction port that houses the heat exchanger and takes in air for heat exchange in the heat exchanger, and and a casing having an outlet for supplying air into the room after heat exchange in the container.
  • heat exchanger heat exchange is performed between the heat medium flowing through the first heat exchanger tube and the second heat exchanger tube and the air passing through the fins.
  • FIG. 2 is a circuit diagram showing an example of a refrigerant circuit of an air conditioner including an indoor unit.
  • 2 is a diagram showing an example of the appearance of the air conditioner shown in FIG. 1.
  • FIG. FIG. 2 is a cross-sectional view showing an outline of the cross section of the indoor unit. It is a typical enlarged view which expanded a part of upper 1st heat exchange part. It is a typical enlarged view which expanded a part of lower 1st heat exchange part.
  • FIG. 3 is a partially enlarged cross-sectional view of a part of the heat exchanger.
  • FIG. 3 is a partially enlarged sectional view showing the shape of a louver.
  • FIG. 7 is a plan view for explaining another shape of the fin.
  • FIG. 7 is a plan view for explaining another shape of the fin.
  • FIG. 7 is a plan view for explaining another shape of the fin. It is a typical enlarged view which expanded a part of upper 1st heat exchange part.
  • the indoor unit 30 and outdoor unit 20 shown in FIG. 1 constitute the air conditioner 10.
  • an indoor unit 30 and an outdoor unit 20 are connected through refrigerant pipes 12 and 13 to form a refrigerant circuit 11.
  • a compressor 21 , a four-way valve 22 , an outdoor heat exchange unit 23 , an expansion valve 24 , an accumulator 25 , and a heat exchanger 31 of an indoor unit 30 are connected to the refrigerant circuit 11 .
  • the outdoor unit 20 includes a compressor 21 , a four-way valve 22 , an outdoor heat exchange unit 23 , an expansion valve 24 , an accumulator 25 , and an outdoor fan 28 .
  • the indoor unit 30 has a heat exchanger 31 and an indoor fan 32.
  • the air conditioner 10 can selectively perform cooling operation and heating operation using a vapor compression refrigeration cycle implemented in the refrigerant circuit 11.
  • the four-way valve 22 switches to the connection state shown by the solid line, connecting the compressor 21 and the outdoor heat exchange unit 23, and also connects the heat exchanger 31 and the accumulator 25.
  • the four-way valve 22 switches to the connected state shown by the broken line, connecting the compressor 21 and the heat exchanger 31 and connecting the outdoor heat exchange unit 23 and the accumulator 25.
  • FIG. 2 shows an example of the appearance of the air conditioner 10.
  • the indoor unit 30 is attached to a wall surface or the like indoors, and the outdoor unit 20 is installed outdoors.
  • the indoor unit 30 shown in FIG. 2 is of a wall-mounted type.
  • the piping member 14 connects the outdoor unit 20 and the indoor unit 30.
  • Refrigerant pipes 12 and 13 pass through the pipe member 14 .
  • electric wires and signal lines (not shown) connected to the outdoor unit 20 and the indoor unit 30 pass through the piping member 14 .
  • the gas refrigerant or gas-liquid two-phase refrigerant that has completed heat exchange in the heat exchanger 31 of the indoor unit 30 is sucked into the compressor 21 through the refrigerant pipe 12, the four-way valve 22, and the accumulator 25.
  • Conditioned air from which heat has been removed by the heat exchanger 31 of the indoor unit 30 is blown out from the indoor unit 30 into the room, for example, thereby cooling the room.
  • the gas refrigerant or gas-liquid two-phase refrigerant that has undergone heat exchange in the outdoor heat exchange unit 23 passes through the four-way valve 22 and the accumulator 25 and is sucked into the compressor 21 .
  • Conditioned air heated by the heat exchanger 31 of the indoor unit 30 is blown out from the indoor unit 30 into the room, thereby heating the room.
  • the outdoor unit 20 includes an outdoor fan 28, and the indoor unit 30 includes an indoor fan 32.
  • the outdoor fan 28 supplies air to the outdoor heat exchange unit 23 in order to promote heat exchange between the air and the refrigerant in the outdoor heat exchange unit 23 in the cooling operation mode and the heating operation mode.
  • the indoor fan 32 supplies indoor air to the heat exchanger 31 in order to promote heat exchange between the air and the refrigerant in the heat exchanger 31 in the cooling operation mode and the heating operation mode.
  • FIG. 3 shows an example of a cross-sectional structure of the indoor unit 30 when cut along a plane perpendicular to the longitudinal direction of the indoor unit 30.
  • the wall WL side is the rear side
  • the opposite side is the front side
  • the direction along the wall WL is the vertical direction
  • directions are indicated by arrows.
  • the indoor unit 30 includes a heat exchanger 31, an indoor fan 32, a casing 33, an air filter 34, a drain pan 36, and a flap 37.
  • the indoor unit 30 includes, for example, a temperature sensor (not shown) that detects indoor air temperature, a humidity sensor (not shown) that detects indoor humidity, and other sensors.
  • a temperature sensor (not shown) that detects indoor air temperature
  • a humidity sensor (not shown) that detects indoor humidity
  • Various sensors such as a temperature sensor and the indoor fan 32 are connected to a control device (not shown).
  • a drain pan 36 is arranged below the heat exchanger 31. Condensation generated in the heat exchanger 31 is collected by the drain pan 36.
  • the casing 33 is formed with an inlet 33a and an outlet 33b.
  • the indoor unit 30 sucks indoor air into the casing 33 from the suction port 33a located above, and blows out conditioned air from the blow-off port 33b located below.
  • the flap 37 is blocking the air outlet 33b.
  • the flap 37 rotates to open the outlet 33b.
  • the surface in contact with the wall WL is the back surface 33R
  • the surface located on the opposite side to the back surface 33R is the front surface 33F.
  • an air filter 34 Inside the casing 33, an air filter 34, a heat exchanger 31, an indoor fan 32, and a flap are installed in the indoor air flow path from the inlet 33a to the outlet 33b, starting from a position close to the inlet 33a (upstream of the airflow). 37 are arranged in order.
  • the heat exchanger 31 located downstream of the air filter 34 is long in the left-right direction (horizontal direction), similar to the casing 33 shown in FIG. It is extending. In other words, the heat exchanger 31 has a horizontal length longer than a vertical length when viewed from the front.
  • the heat exchanger 31 includes a first heat exchange section 31F near the front surface 33F and a second heat exchange section 31R near the back surface 33R.
  • the first heat exchange section 31F includes an upper first heat exchange section 31FU and a lower first heat exchange section 31FL.
  • the upper first heat exchange section 31FU and the lower first heat exchange section 31FL are attached so as to be inclined in different directions so as to surround the indoor fan 32.
  • the upper first heat exchange section 31FU is inclined so as to approach the front surface 33F of the casing 33 as it goes downward.
  • the lower first heat exchange section 31FL is inclined so as to move away from the front surface 33F of the casing 33 as it goes downward.
  • the heat exchanger 31 has a plurality of heat exchanger tubes 31b.
  • the heat exchanger 31 has a shape that opens downward so as to cover the upper part of the indoor fan 32 when viewed in the direction in which the heat exchanger tubes 31b extend (in side view).
  • a shape is referred to as a ⁇ shape or a C-shape.
  • FIG. 3 shows a state in which a plurality of heat transfer tubes 31b having a circular cross section pass through the fins 31a of the first heat exchange section 31F, and a state in which a plurality of heat transfer tubes having a circular cross section pass through the fins 31a of the second heat exchange section 31R.
  • 31b is shown passing through.
  • a plurality of fins 31a of the first heat exchange section 31F and the second heat exchange section 31R are stacked on each other in the direction in which the heat exchanger tubes 31b extend.
  • the plurality of heat exchanger tubes 31b and the plurality of fins 31a are thermally connected. Thereby, heat is transferred between the air flowing between the plurality of fins 31a and the refrigerant flowing in the plurality of heat transfer tubes 31b via the fins 31a and the heat transfer tubes 31b.
  • a plurality of U-shaped tubes are connected to the plurality of heat transfer tubes 31b.
  • one U-shaped tube is connected to one end of the two heat transfer tubes 31b.
  • a refrigerant flows through the plurality of heat transfer tubes 31b.
  • the refrigerant flowing through the plurality of heat transfer tubes 31b is a type of heat medium.
  • the refrigerant flowing through a certain heat exchanger tube 31b is turned around at a U-shaped tube and flows to another heat exchanger tube 31b.
  • the other end of the other heat exchanger tube 31b is further connected to another heat exchanger tube 31b via another U-shaped tube.
  • the refrigerant that has flowed through the other heat exchanger tube 31b further flows to the other heat exchanger tube 31b via another U-shaped tube.
  • the refrigerant is turned back many times through the plurality of U-shaped tubes, flows through the plurality of heat transfer tubes 31b, and flows through each fin 31a a plurality of times.
  • An indoor fan 32 is arranged downstream of the heat exchanger 31 so as to be surrounded by the ⁇ -shaped heat exchanger 31.
  • the indoor fan 32 shown in FIG. 3 is a cross-flow fan arranged along the direction in which the heat exchanger tubes 31b extend.
  • the indoor fan 32 generates an airflow in a direction perpendicular to the heat exchanger tube 31b.
  • the indoor fan 32 includes a motor (not shown) that can change the rotation speed, and the air volume can be changed by changing the rotation speed of the cross flow fan.
  • Flap A flap 37 is arranged at the air outlet 33b. Flaps 37 include, for example, the horizontal flaps illustrated in FIG. 3 and the vertical flaps (not shown). The horizontal flap vertically changes the direction of air blown out from the outlet 33b. The vertical flap changes the direction of air blown out from the outlet 33b to the left or right.
  • FIG. 4 shows a part of the fins 31a of the upper first heat exchange section 31FU in an enlarged manner.
  • FIG. 5 shows a part of the fins 31a of the lower first heat exchange section 31FL in an enlarged manner.
  • first fins 310 the fins 31a of the first upper heat exchange section 31FU will be referred to as first fins 310
  • second fin 320 is called a second fin 320.
  • FIG. 6 shows a partially enlarged cross section of the fin 31a (the first fin 310 or the second fin 320), the first heat exchanger tube 211, and the second heat exchanger tube 212.
  • the second heat exchanger tube 212 is arranged vertically below and adjacent to the first heat exchanger tube 211 .
  • the first fin 310 and the second fin 320 each include a first fin collar 111, a second fin collar 112, a raised part 120, and a water guide part 410.
  • the first fin collar 111 is in close contact with the first heat exchanger tube 211 .
  • the second fin collar 112 is in close contact with the second heat exchanger tube 212.
  • the second fin collar 112 is arranged vertically below and adjacent to the first fin collar 111 .
  • the first fin collar 111 and the second fin collar 112 are portions rising from the fin surface 31s of the fin 31a.
  • the second fin collar 112 is arranged below the first fin collar 111 in the vertical direction, it is sufficient that the second fin collar 112 is located below the first fin collar 111 in the vertical direction.
  • the phrase "disposed vertically downward” does not mean that it is disposed directly below.
  • the second fin collar 112 may be located diagonally below the first fin collar 111 when viewed in the vertical direction.
  • the second heat exchanger tube 212 is arranged vertically below the first heat exchanger tube 211, it is the same as when it is said that the second fin collar 112 is arranged vertically below the first fin collar 111. .
  • the cut and raised portion 120 is cut and raised in the penetrating direction DR1 of the first heat exchanger tube 211.
  • the cut-and-raised portions 120 shown in FIGS. 4 to 6 are bridge-shaped cut-and-raised portions that project from the fin surface 31s in the same direction as the penetration direction DR1.
  • the direction in which the cut and raised portion 120 extends is referred to as the longitudinal direction DR2.
  • an opening 130 is formed at the location where the cut and raised portion is formed when viewed in the direction DR3 orthogonal to the penetration direction DR1 and the longitudinal direction DR2 (see FIG. 6). This opening 130 allows the cut and raised portion 120 to pass the airflow along the fin surface 31s.
  • the aforementioned direction DR3 generally corresponds to the direction in which the airflow passes.
  • the distance between the first fin collar 111 and the cut-and-raised portion 120 is greater than 0 and less than or equal to 5 mm.
  • the water guide portion 410 is provided on the fin surface 31s of the fin 31a.
  • the water guide portion 410 shown in FIGS. 4 to 6 is a rib.
  • the water guiding portion 410 has a structure in which the fins 31a are deformed into a convex shape.
  • This rib is a water guide portion 410 that guides dew condensation water more easily than the surrounding fin surface 31s.
  • the height h1 of the ribs of the water guide portion 410 is 0.05 mm or more and less than half the fin pitch.
  • the water guide section 410 is arranged apart from the first fin collar 111.
  • the water guide portion 410 extends along the direction from the first fin collar 111 to the second fin collar 112.
  • the water guide portion 410 is a straight line passing through the first point Po1 of the first fin collar 111 and the second point Po2 of the second fin collar 112. It may extend not only in parallel to Ln1 (see FIGS. 4 and 5) but also in a direction inclined within a range of ⁇ 45 degrees with respect to straight line Ln1.
  • the water guide portion 410 has a first starting point SP1 located near the first fin collar 111 and apart from the first fin collar 111.
  • the first starting point SP1 of the water guide portion 410 is arranged in the first region AR1 where dew condensation water accumulates between the first fin collar 111 and the cut and raised portion 120.
  • the first starting point SP1 is located apart from the first fin collar 111, and the distance from the first starting point SP1 to the first fin collar 111 is set within a range of 0.1 mm to 1 mm.
  • the first region AR1 is indicated by diagonal lines in FIGS. 4 and 5.
  • the water guide portion 410 has a first portion 411 extending from the first starting point SP1 in a direction away from the cut and raised portion 120.
  • the cut-and-raised portion 120 located between the first fin collar 111 and the second fin collar 112 can be regarded as the first cut-and-raised portion 121 .
  • the first region AR1 is a region surrounded by the first fin collar 111, the first cut and raised portion 121, the first line segment LS1, and the second line segment LS2.
  • the first cut and raised portion 121 has a first cutting line CL1 and a second cutting line CL2.
  • the first cutting line CL1 extends along the first straight line Ln1 and is close to the first straight line Ln1
  • the second cutting line CL2 extends along the first straight line Ln1 and is far from the first straight line Ln1. That's the way to go.
  • the first straight line Ln1 is a straight line passing through the first point Po1 of the first fin collar 111 and the second point Po2 of the second fin collar 112.
  • the first point Po1 is located on the first fin collar 111 closest to the second fin collar 112.
  • the second point Po2 is located on the second fin collar 112 closest to the first fin collar 111.
  • the first point Po1 and the second point Po2 are located at the boundary between the first fin collar 111 and the fin surface 31s and at the boundary between the second fin collar 112 and the fin surface 31s (see FIG. 6).
  • the first line segment LS1 is a line segment connecting the first point Po1 and the midpoint MP1 of the first cutting line CL1.
  • the second line segment LS2 is a line segment that connects the upper end point UP1 of the second cutting line CL2 and the third point Po3.
  • the third point Po3 is a point in the first fin collar 111 located farthest from the first straight line Ln1 and closest to the first cut and raised portion 121.
  • the fin 31a includes a second cut and raised portion 122.
  • the second cut and raised portion 122 is arranged to intersect with the second straight line Ln2.
  • the second straight line Ln2 is a straight line passing through the third point Po3 and the fourth point Po4.
  • the fourth point Po4 is located in the first fin collar 111 at a position farthest from the first straight line Ln1 and farthest from the first cut and raised portion 121.
  • the water guide section 410 has a second starting point SP2 in the second region AR2.
  • the second region AR2 is a region surrounded by the first fin collar 111, the second cut and raised portion 122, the third line segment LS3, and the fourth line segment LS4. In FIGS. 4 and 5, the second region AR2 is shaded.
  • the water guide section 410 has a second portion 412.
  • the second portion 412 extends from the second starting point SP2 in a direction away from the second cut and raised portion 122.
  • the second starting point SP2 is located apart from the first fin collar 111, and the distance from the second starting point SP2 to the first fin collar 111 is set within a range of 0.1 mm to 1 mm.
  • the second cut-and-raised portion 122 has a third cutting line CL3 that extends along the first straight line Ln1 and is close to the first straight line.
  • the third line segment LS3 is a line segment connecting the first point Po1 and the lower end point LP1 of the third cutting line CL3.
  • the fourth line segment LS4 is a line segment connecting the fifth point Po5 and the fourth point Po4.
  • the fifth point Po5 is the closest point to the fourth point Po4 on the third cutting line CL3.
  • the water guide section 410 shown in FIGS. 4 and 5 has a linear shape that extends obliquely with respect to the first straight line Ln1.
  • the angle of inclination of the rib, which is the water guide portion 410, with respect to the first straight line Ln1 is set within the range of 10 degrees to 45 degrees.
  • the water guide portion 410 shown in FIGS. 4 and 5 has a linear shape, it may have a curved shape.
  • the curved water guide portion 410 extends so that its tangent line is inclined with respect to the first straight line.
  • the angle of inclination of the tangent of the curved water guiding portion 410 to the first straight line Ln1 is set within the range of 10 degrees to 45 degrees.
  • the water guide portion 410 shown in FIGS. 4 and 5 has a Y-shaped shape divided into two parts whose distance becomes wider as they approach the first fin collar 111.
  • the parts that are divided into two are a first part 411 and a second part 412.
  • the distance between the first portion 411 and the second portion 412 increases as it goes vertically upward.
  • the water guide portion 410 shown in FIG. 5 is located at a position farther from the cut-and-raised portion 120 (first cut-and-raised portion 121) than the sixth point Po6 at the upper end of the second fin collar 112, and further from the second fin collar 112.
  • the end point EP1 is located at the position shown in FIG.
  • the cut and raised portion 120 is formed by a bridge type cut and raised portion has been described.
  • the cut-and-raised part 120 may be a louver-shaped cut-and-raised part as shown in FIG.
  • the louver-shaped cut and raise lifts the first cutting line CL1 so as to protrude from the fin surface 31s, and pushes down the second cutting line CL2 so as to sink from the fin surface 31s.
  • an opening 130 is formed between the first cutting line CL1 and the fin surface 31s.
  • the airflow AF that has reached the cut and raised portion 120 along the fin surface 31s flows to the back side of the fin 31a through the opening 130.
  • FIG. 8 shows a water guide portion 410 having a shape different from that of the above embodiment.
  • the water guiding portion 410 has a second portion 412 and a third portion 413 that are shaped to direct the airflow AF from outside the range of the cut and raised portion 120 to within the range of the cut and raised portion 120 .
  • the second portion 412 is provided closer to the first fin collar 111 than the central portion of the cut and raised portion 120 in the longitudinal direction DR2.
  • the second portion 412 has a shape that gradually approaches the cut and raised portion 120 from the side closer to the first fin collar 111 to the side closer to the center of the cut and raised portion 120 in the longitudinal direction DR2.
  • the third portion 413 is provided closer to the second fin collar 112 than the central portion of the cut and raised portion 120 in the longitudinal direction DR2.
  • the third portion 413 has a shape that gradually approaches the cut and raised portion 120 as it goes from the side closer to the second fin collar 112 to the side closer to the center of the cut and raised portion 120 in the longitudinal direction DR2.
  • the water guide section 410 in FIG. 8 has an X-shape. However, even if the water guiding portion 410 does not include the fourth portion 414, it has a shape that directs the airflow AF from outside the range of the cut and raised portion 120 to within the range of the cut and raised portion 120.
  • the fourth portion 414 is a portion close to the second fin collar 112 and the cut and raised portion 120.
  • the fin 31a of FIG. 8 when the fin 31a of FIG. 8 is applied to the upper first heat exchange section 31FU, it may be attached at an angle as shown in FIG. 4. Furthermore, when the fins 31a in FIG. 8 are applied to the lower first heat exchange section 31FL, they may be attached at an angle as shown in FIG. 5.
  • FIG. 9 shows a water guide portion 410 having a shape different from that of the above embodiment.
  • the water guide section 410 in FIG. 9 differs from the water guide section 410 in FIG. 4 in that it has a broken line-shaped section 415 at a location other than the first section 411 and the second section 412.
  • This broken line-shaped portion 415 is a portion in which short convex shapes are connected at intervals.
  • the broken line-shaped portion 415 in FIG. 9 can be considered to be a series of short ribs like stepping stones, or a part of a long rib that is flush with the fin surface 31s. Note that the water guide section 410 in FIG.
  • FIG. 9 has a first portion 411 and a second portion 412 that are separated into two parts, the distance from which increases as they approach the first fin collar 111. Moreover, when the fin 31a of FIG. 9 is applied to the upper first heat exchange section 31FU, the fin 31a may be attached at an angle as shown in FIG. 4. Furthermore, when the fins 31a in FIG. 9 are applied to the lower first heat exchange section 31FL, they may be attached at an angle as shown in FIG. 5.
  • FIG. 10 shows a water guide section 410 having a different shape from the water guide section 410 in FIG. 9 .
  • the water guide section 410 in FIG. 10 is different from the water guide section 410 in FIG. 9 in that the first section 411 includes a broken line-shaped section 416.
  • This broken line-shaped portion 416 is a portion in which short convex shapes are connected at intervals.
  • the broken line-shaped portion 416 in FIG. 10 can be considered to be a series of short ribs like stepping stones, or a part of a long rib that is flush with the fin surface 31s.
  • the fin 31a of FIG. 10 when the fin 31a of FIG. 10 is applied to the upper first heat exchange section 31FU, it may be attached at an angle as shown in FIG. 4.
  • the fins 31a in FIG. 10 are applied to the lower first heat exchange section 31FL, they may be attached at an angle as shown in FIG. 5.
  • the water guiding portion 410 is a rib, but the water guiding portion 410 may be a convex portion other than a rib.
  • a linear member may be attached to the fin surface 31s.
  • the location where the linear member is attached is, for example, the location where the Y-shaped water guide portion 410 in FIG. 4 is formed.
  • the water guide portion 410 may be formed by subjecting the fin surface 31s to a hydrophilic treatment.
  • the hydrophilic treatment includes, for example, a method of forming an activated photocatalyst on the fin surface 31s.
  • the location to which the hydrophilic treatment is applied is, for example, the location where the Y-shaped water guide portion 410 in FIG. 4 is formed.
  • the water guiding portion 410 may be formed by combining ribs and hydrophilic treatment.
  • the water guide portion 410 is disposed apart from the first fin collar 111 and extends toward the second fin collar 112.
  • the water guide portion 410 has a first starting point located in a first region AR1 where dew condensation water accumulates between the first fin collar 111 and the cut and raised portion 120.
  • the water guide portion 410 has a first portion 411 extending from the first starting point SP1 in a direction away from the cut and raised portion 120.
  • Such a water guiding portion 410 can guide the condensed water accumulated in the first region AR1 away from the cut and raised portion 120 so that the condensed water does not block the cut and raised portion 120.
  • the water guide section 410 shown in FIG. 411 it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins 31a due to dew condensation.
  • the water guide section 410 shown in FIG. 412 it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins 31a due to dew condensation.
  • the water guiding portion 410 may also be formed in the process of forming the first fin collar 111, the second fin collar 112, etc. by, for example, press working.
  • the water guide portion 410 can be formed at low cost.
  • the water guide portion 410 is a rib, it is easier to guide condensed water on both the front and back surfaces of the fin 31a than on the fin surface 31s around the rib.
  • the water guide portion 410 has a linear shape that extends obliquely to the first straight line Ln1, or a curved shape that extends such that the tangent line is oblique to the first straight line Ln1.
  • a linear shape that is inclined with respect to the first straight line Ln1 or a curved shape that extends so that the tangent line is inclined the ventilation resistance that occurs in the convex water guiding portion 410 is reduced compared to the case where it extends substantially parallel to the first straight line Ln1. Can be reduced. This effect has been confirmed through repeated experiments.
  • the water guide portion 410 has a shape that is divided into two or bifurcated parts, the distance of which increases as the distance approaches the first fin collar 111.
  • the two or bifurcated shapes described above are the first portion 411 and the second portion 412 of the water guide portion 410 . With such a two-pronged or bifurcated shape, condensed water can be collected from two locations, so a large amount of condensed water can be quickly drained.
  • the water guiding portion 410 shown in FIG. 8 has a shape that directs the airflow from outside the range of the cut and raised portion 120 to within the range of the cut and raised portion 120.
  • Such shapes are the second portion 412 and the third portion 413 in FIG.
  • the heat exchanger 31 having such fins 31a can improve the heat transfer performance of the cut and raised portions 120 due to the airflow directed toward the cut and raised portions 120 by the second portion 412 and the third portion 413.
  • the water guiding section 410 shown in FIGS. 9 and 10 has portions 415 and 416 shaped like broken lines. Since the broken line-shaped portions 415 and 416 have discontinuous portions, the fins 31a can reduce ventilation resistance.
  • the end point EP1 is located at a position farther from the cut-and-raised portion 120 than the sixth point Po6 at the upper end of the second fin collar 112 and further from the second fin collar 112. .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)

Abstract

A heat exchanger, wherein drainage properties for condensation water are improved. A water-guiding part (410) is disposed set apart from a first fin collar (111) and extends toward a second fin collar (112). The water-guiding part (410) has a first start point (SP1) disposed in a first area (AR1) in which condensation water collects between the first fin collar (111) and a cut-and-erected part (120). The water-guiding part (410) also has a first portion (411) extending from the first start point (SP1) in a direction away from the cut-and-erected part (120).

Description

熱交換器及び室内機Heat exchanger and indoor unit
 本開示は、伝熱管及びフィンを備える熱交換器及び熱交換器を備える室内機に関する。 The present disclosure relates to a heat exchanger including heat exchanger tubes and fins, and an indoor unit including the heat exchanger.
 従来から、空気調和機には、熱媒体と空気との熱交換を行う熱交換器が用いられる場合がある。このような熱交換器には、複数のフィンと、各フィンを貫通する複数の伝熱管で構成されているものがある。例えば、特許文献1(特開2013-221680号公報)には、フィンチューブ熱交換器が開示されている。 Conventionally, air conditioners have sometimes used a heat exchanger that exchanges heat between a heat medium and air. Some such heat exchangers are configured with a plurality of fins and a plurality of heat transfer tubes passing through each fin. For example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2013-221680) discloses a fin tube heat exchanger.
 空気中には水分が含まれているため、熱交換のときに熱交換器に結露水が生じる場合がある。熱交換のときに生じる結露水は、フィンの表面に付着して、熱交換効率を低下させる。熱交換器では、結露水の排水性を向上させることが課題となっている。 Since the air contains moisture, condensation water may form on the heat exchanger during heat exchange. Condensed water generated during heat exchange adheres to the surface of the fins, reducing heat exchange efficiency. In heat exchangers, improving the drainage of condensed water is an issue.
 特許文献1に記載の熱交換器では、伝熱管の鉛直方向下方に存在するフィンの傾斜部に結露水が溜まり易いことに着目して、鉛直方向に延びた排水のための細長い孔が傾斜部に設けられている。しかしながら、結露水が溜まるのは伝熱管の下方の傾斜部分には限られない。フィンには、熱交換効率を向上させるために、フィンの一部に切れ目を入れて立体的に変形させたスリット及びルーバーと呼ばれる切起部が設けられる場合がある。このようなスリット及びルーバーと伝熱管との間に結露水が溜まることがある。 In the heat exchanger described in Patent Document 1, focusing on the fact that dew condensation water tends to accumulate on the sloped parts of the fins that exist vertically below the heat exchanger tubes, elongated holes for drainage extending in the vertical direction are installed in the sloped parts. It is set in. However, condensed water is not limited to the lower inclined portion of the heat exchanger tube. In order to improve heat exchange efficiency, the fins are sometimes provided with slits and raised parts called louvers, which are formed by making cuts in a part of the fins and deforming the fins three-dimensionally. Condensed water may accumulate between such slits and louvers and the heat transfer tubes.
 切起部が伝熱管の鉛直方向下方に無い場合、伝熱管と切起部の間に溜まった結露水に対しては、伝熱管の下方からさらに鉛直方向下方に向かって真っすぐ延びている細長い孔では効果的な排水ができない。切起部の周辺に溜まった結露水は、熱交換器を流れる空気の通風抵抗の原因になる。 If the cut-out part is not located vertically below the heat exchanger tube, the condensed water that has accumulated between the heat exchanger tube and the cut-out part can be drained through a long, slender hole that extends straight from below the heat exchanger tube further downward in the vertical direction. Therefore, effective drainage cannot be achieved. The condensed water that accumulates around the cut and raised portions causes ventilation resistance for the air flowing through the heat exchanger.
 熱交換器のフィンに切起部が形成されている場合には、切起部と伝熱管との間に結露水が溜まり、通風抵抗が高くなるという課題がある。 When cut-and-raised portions are formed on the fins of a heat exchanger, there is a problem that condensed water accumulates between the cut-and-raised portions and the heat transfer tubes, increasing ventilation resistance.
 第1観点の熱交換器は、フィンとフィンを貫通し且つ熱媒体を流すための第1伝熱管及び第1伝熱管の鉛直方向下方に隣り合う第2伝熱管とを備える熱交換器である。フィンは、第1伝熱管に密着する第1フィンカラー、及び第2伝熱管に密着する第2フィンカラーと、第1伝熱管の貫通方向に切り起された切起部と、フィン表面に設けられ、周囲のフィン表面よりも結露水を導き易い導水部と、を備えている。導水部は、第1フィンカラーから離れて配置されて第2フィンカラーに向かう方向に沿って延びており、第1フィンカラーと切起部の間の結露水が溜まる第1領域に配置された第1始点を有し、切起部から離れる方向に第1始点より延びる第1部分を有する。 The heat exchanger according to the first aspect is a heat exchanger that includes fins, a first heat exchanger tube that passes through the fins and allows a heat medium to flow, and a second heat exchanger tube that is adjacent to the first heat exchanger tube in the vertical direction downward. . The fin includes a first fin collar that is in close contact with the first heat exchanger tube, a second fin collar that is in close contact with the second heat exchanger tube, a cut-and-raised part that is cut in the penetrating direction of the first heat exchanger tube, and provided on the fin surface. and a water guide portion that guides condensed water more easily than the surrounding fin surfaces. The water guiding portion is disposed away from the first fin collar and extends in a direction toward the second fin collar, and is disposed in a first region where condensed water collects between the first fin collar and the cut-out portion. It has a first starting point, and has a first portion extending from the first starting point in a direction away from the cut and raised portion.
 第1観点の熱交換器では、切起部を結露水が塞がないように、第1領域に溜まった結露水を切起部から離しながら導水部で導けるので、フィンに沿って流れる気流に対する通風抵抗が結露水によって増加するのを抑制できる。 In the heat exchanger according to the first aspect, the condensed water accumulated in the first region can be guided away from the cut and raised parts by the water guide part so that the cut and raised parts are not blocked by condensed water, so that the airflow flowing along the fins is It is possible to suppress the increase in ventilation resistance caused by condensed water.
 第2観点の熱交換器は、第1観点の熱交換器であって、切起部は、第1フィンカラーと第2フィンカラーの間に配置されている第1切起部である。第1領域は、第1フィンカラーと、第1切起部と、第1線分と、第2線分とに囲まれている領域である。第1切起部は、第2フィンカラーに最も近い第1フィンカラーの第1点と第1フィンカラーに最も近い第2フィンカラーの第2点とを通る第1直線に沿って延びていて第1直線に近い第1切断線と第1直線から遠い第2切断線とを有する。第1線分は、第1点と第1切断線の中点とを結ぶ線分である。第2線分は、第2切断線の上端点と第3点とを結ぶ線分である。第3点は、第1直線から最も遠く且つ第1切起部に近い位置にある第1フィンカラーの中の点である。 The heat exchanger of the second aspect is the heat exchanger of the first aspect, and the cut-and-raised portion is the first cut-and-raised portion disposed between the first fin collar and the second fin collar. The first region is a region surrounded by the first fin collar, the first cut and raised portion, the first line segment, and the second line segment. The first cut-out portion extends along a first straight line passing through a first point of the first fin collar closest to the second fin collar and a second point of the second fin collar closest to the first fin collar. It has a first cutting line that is close to the first straight line and a second cutting line that is far from the first straight line. The first line segment is a line segment connecting the first point and the midpoint of the first cutting line. The second line segment is a line segment connecting the upper end point of the second cutting line and the third point. The third point is a point in the first fin collar that is farthest from the first straight line and closest to the first notch.
 第2観点の熱交換器では、第1切起部を結露水が塞がないように、第1領域に溜まった結露水を第1切起部から離しながら第1領域の第1始点から延びる導水部の第1部分で導けるので、フィンに沿って流れる気流に対する通風抵抗が結露水によって増加するのを抑制できる。 In the heat exchanger according to the second aspect, the condensed water extends from the first starting point of the first region while separating the condensed water accumulated in the first region from the first cut and raised portion so that the first cut and raised portion is not blocked by condensed water. Since the water can be guided by the first portion of the water guide portion, it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins due to the condensed water.
 第3観点の熱交換器は、第2観点の熱交換器であって、フィンは、第1フィンカラーの中で第1直線から最も遠く且つ第1切起部から遠い位置にある第4点と第3点とを通る第2直線と交差するように配置された第2切起部を備える。導水部は、第1フィンカラーと、第2切起部と、第3線分と、第4線分とに囲まれている第2領域に第2始点を有し、第2切起部から離れる方向に第2始点より延びる第2部分を有する。第2切起部は、第1直線に沿って延びていて第1直線に近い第3切断線を有する。第3線分は、第1点と第3切断線の下端点とを結ぶ線分である。第4線分は、第3切断線の中で第4点に最も近い第5点と第4点とを結ぶ線分である。 The heat exchanger according to the third aspect is the heat exchanger according to the second aspect, and the fins are located at a fourth point in the first fin collar that is farthest from the first straight line and farthest from the first cutout. and the third point. The water guiding portion has a second starting point in a second region surrounded by the first fin collar, the second cut and raised portion, the third line segment, and the fourth line segment, and has a second starting point from the second cut and raised portion. It has a second portion extending away from the second starting point. The second cut-and-raised portion has a third cutting line that extends along the first straight line and is close to the first straight line. The third line segment is a line segment connecting the first point and the lower end point of the third cutting line. The fourth line segment is a line segment that connects the fourth point and the fifth point that is closest to the fourth point among the third cutting lines.
 第3観点の熱交換器では、第2切起部を結露水が塞がないように、第2領域に溜まった結露水を第2切起部から離しながら第2領域の第2始点から延びる導水部の第2部分で導けるので、フィンに沿って流れる気流に対する通風抵抗が結露水によって増加するのを抑制できる。 In the heat exchanger according to the third aspect, the condensed water extends from the second starting point of the second region while separating the condensed water accumulated in the second region from the second cut and raised portion so that the second cut and raised portion is not blocked by condensed water. Since the water can be guided by the second portion of the water guide portion, it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins due to the condensed water.
 第4観点の熱交換器は、第2観点又は第3観点の熱交換器であって、導水部は、フィンを凸状に変形させた構造を有する。 The heat exchanger according to the fourth aspect is the heat exchanger according to the second or third aspect, and the water guide portion has a structure in which fins are deformed into a convex shape.
 第4観点の熱交換器では、例えばプレス加工で、フィンカラーを形成する工程で導水部も形成でき、安価に導水部を形成することができる。 In the heat exchanger of the fourth aspect, the water guide portion can also be formed in the process of forming the fin collar, for example by press working, and the water guide portion can be formed at low cost.
 第5観点の熱交換器は、第4観点の熱交換器であって、凸状に変形させた部分がリブである。 The heat exchanger according to the fifth aspect is the heat exchanger according to the fourth aspect, and the portion deformed into a convex shape is a rib.
 第5観点の熱交換器では、導水部がリブであって連続した構造であることから、フィンの表面でも裏面でも、リブの周囲のフィン表面よりも結露水を導き易くなる。 In the heat exchanger of the fifth aspect, since the water guide portion is a rib and has a continuous structure, it is easier to guide condensed water on both the front and back surfaces of the fins than on the fin surfaces around the ribs.
 第6観点の熱交換器は、第4観点又は第5観点の熱交換器であって、導水部は、第1直線に対して傾斜して延びている直線形状、または、接線が第1直線に対して傾斜するように延びている曲線形状を有する。 The heat exchanger according to the sixth aspect is the heat exchanger according to the fourth aspect or the fifth aspect, wherein the water guide part has a linear shape extending at an angle with respect to the first straight line, or a tangent line is the first straight line. It has a curved shape that extends obliquely to the surface.
 第6観点の熱交換器では、第1直線に対して傾斜する直線形状または接線が傾斜するように延びる曲線形状とすることで、第1直線と略平行に延びる場合に比べて凸状の導水部で生じる通風抵抗を低減できる。 In the heat exchanger according to the sixth aspect, by having a linear shape that is inclined with respect to the first straight line or a curved shape that extends so that the tangent line is inclined, the water conduction is convex compared to the case where the heat exchanger extends substantially parallel to the first straight line. It can reduce the ventilation resistance that occurs in the area.
 第7観点の熱交換器は、第4観点から第6観点のいずれかの熱交換器であって、導水部は、第1フィンカラーに近づくにつれて互いに間隔が広がる2本または二又に分かれた形状を有する。 The heat exchanger according to the seventh aspect is the heat exchanger according to any one of the fourth to sixth aspects, in which the water guide part is divided into two or bifurcated parts, the distance of which increases as the distance approaches the first fin collar. It has a shape.
 第7観点の熱交換器では、2本または二又に分かれた形状の一つの導水部で2箇所から結露水を集めるので速く多くの結露水を排水することができる。 In the heat exchanger according to the seventh aspect, since condensed water is collected from two places using one water guide section having a two-way or bifurcated shape, a large amount of condensed water can be quickly drained.
 第8観点の熱交換器は、第4観点から第7観点のいずれかの熱交換器であって、導水部が、気流を切起部の範囲外から切起部の範囲内に向ける形状を有する。 The heat exchanger according to the eighth aspect is the heat exchanger according to any one of the fourth to seventh aspects, in which the water guiding part has a shape that directs the airflow from outside the range of the cut and raised part to within the range of the cut and raised part. have
 第8観点の熱交換器では、気流を切起部の範囲外から切起部の範囲内に向ける形状によって向けられた気流により、切起部による熱伝達性能を向上させることができる。 In the heat exchanger of the eighth aspect, the airflow directed by the shape that directs the airflow from outside the range of the cut and raised part to within the range of the cut and raised part can improve the heat transfer performance by the cut and raised part.
 第9観点の熱交換器は、第4観点から第7観点のいずれかの熱交換器であって、導水部は、破線形状の部分を有する。 The heat exchanger according to the ninth aspect is the heat exchanger according to any one of the fourth to seventh aspects, and the water guide portion has a portion shaped like a broken line.
 第9観点の熱交換器では、破線形状の導水部が途切れる部分を有しているので、ファインがこの途切れる部分で通風抵抗を低減することができる。 In the heat exchanger according to the ninth aspect, since the water guide portion shaped like a broken line has a discontinuous portion, it is possible to reduce ventilation resistance at this discontinuous portion.
 第10観点の熱交換器は、第1観点から第9観点のいずれかの熱交換器であって、第1フィンカラーと切起部との間の距離は、0よりも大きく5mm以下である。 The heat exchanger according to the tenth aspect is the heat exchanger according to any one of the first to ninth aspects, wherein the distance between the first fin collar and the cut portion is greater than 0 and equal to or less than 5 mm. .
 第11観点の熱交換器は、第1観点から第10観点のいずれかの熱交換器であって、導水部は、第2フィンカラーの上端の第6点よりも切起部から遠い位置で且つ第2フィンカラーから離れた位置に終点が配置されている。 The heat exchanger according to the eleventh aspect is the heat exchanger according to any one of the first to tenth aspects, and the water guide portion is located at a position farther from the cutout than the sixth point at the upper end of the second fin collar. Moreover, the end point is located at a position away from the second fin collar.
 第11観点の熱交換器では、導水部によって第2フィンカラーに導かれた結露水が再び切起部の方に戻るのを抑制することができる。 In the heat exchanger of the eleventh aspect, it is possible to suppress the condensed water guided to the second fin collar by the water guide portion from returning to the cut and raised portions.
 第12観点の室内機は、第1観点から第11観点のいずれかの熱交換器と、熱交換器を収納し、熱交換器での熱交換のための空気を取り入れる吸込口と、熱交換器での熱交換後の空気を室内に供給する吹出口とを有するケーシングと、を備える。熱交換器において、第1伝熱管及び第2伝熱管を流れる熱媒体とフィンを通過する空気との熱交換を行う。 The indoor unit according to the twelfth aspect includes the heat exchanger according to any one of the first to eleventh aspects, a suction port that houses the heat exchanger and takes in air for heat exchange in the heat exchanger, and and a casing having an outlet for supplying air into the room after heat exchange in the container. In the heat exchanger, heat exchange is performed between the heat medium flowing through the first heat exchanger tube and the second heat exchanger tube and the air passing through the fins.
室内機を含む空気調和機の冷媒回路の一例を示す回路図である。FIG. 2 is a circuit diagram showing an example of a refrigerant circuit of an air conditioner including an indoor unit. 図1の空気調和機の外観の一例を示す図である。2 is a diagram showing an example of the appearance of the air conditioner shown in FIG. 1. FIG. 室内機の断面の概要を示す断面図である。FIG. 2 is a cross-sectional view showing an outline of the cross section of the indoor unit. 上部第1熱交換部の一部を拡大した模式的な拡大図である。It is a typical enlarged view which expanded a part of upper 1st heat exchange part. 下部第1熱交換部の一部を拡大した模式的な拡大図である。It is a typical enlarged view which expanded a part of lower 1st heat exchange part. 熱交換器の一部を拡大した部分拡大断面図である。FIG. 3 is a partially enlarged cross-sectional view of a part of the heat exchanger. ルーバーの形状を示す部分拡大断面図である。FIG. 3 is a partially enlarged sectional view showing the shape of a louver. フィンの他の形状を説明するための平面図である。FIG. 7 is a plan view for explaining another shape of the fin. フィンの他の形状を説明するための平面図である。FIG. 7 is a plan view for explaining another shape of the fin. フィンの他の形状を説明するための平面図である。FIG. 7 is a plan view for explaining another shape of the fin. 上部第1熱交換部の一部を拡大した模式的な拡大図である。It is a typical enlarged view which expanded a part of upper 1st heat exchange part.
 <第1実施形態>
 (1)全体構成
 図1に示されている室内機30と室外機20は、空気調和機10を構成する。空気調和機10では、室内機30と室外機20とが冷媒配管12,13で接続されて冷媒回路11が形成されている。冷媒回路11には、圧縮機21と四方弁22と室外熱交換ユニット23と膨張弁24とアキュムレータ25と室内機30の熱交換器31が接続されている。室外機20は、圧縮機21と四方弁22と室外熱交換ユニット23と膨張弁24とアキュムレータ25と室外ファン28を有している。室内機30は、熱交換器31と室内ファン32を有している。空気調和機10は、冷媒回路11で実施される蒸気圧縮式冷凍サイクルにより、冷房運転及び暖房運転を選択的に行うことができる。
<First embodiment>
(1) Overall configuration The indoor unit 30 and outdoor unit 20 shown in FIG. 1 constitute the air conditioner 10. In the air conditioner 10, an indoor unit 30 and an outdoor unit 20 are connected through refrigerant pipes 12 and 13 to form a refrigerant circuit 11. A compressor 21 , a four-way valve 22 , an outdoor heat exchange unit 23 , an expansion valve 24 , an accumulator 25 , and a heat exchanger 31 of an indoor unit 30 are connected to the refrigerant circuit 11 . The outdoor unit 20 includes a compressor 21 , a four-way valve 22 , an outdoor heat exchange unit 23 , an expansion valve 24 , an accumulator 25 , and an outdoor fan 28 . The indoor unit 30 has a heat exchanger 31 and an indoor fan 32. The air conditioner 10 can selectively perform cooling operation and heating operation using a vapor compression refrigeration cycle implemented in the refrigerant circuit 11.
 四方弁22は、冷房運転モードでは、実線で示された接続状態に切り換わり、圧縮機21と室外熱交換ユニット23を接続するとともに熱交換器31とアキュムレータ25を接続する。四方弁22は、暖房運転モードでは、破線で示された接続状態に切り換わり、圧縮機21と熱交換器31を接続するとともに室外熱交換ユニット23とアキュムレータ25を接続する。 In the cooling operation mode, the four-way valve 22 switches to the connection state shown by the solid line, connecting the compressor 21 and the outdoor heat exchange unit 23, and also connects the heat exchanger 31 and the accumulator 25. In the heating operation mode, the four-way valve 22 switches to the connected state shown by the broken line, connecting the compressor 21 and the heat exchanger 31 and connecting the outdoor heat exchange unit 23 and the accumulator 25.
 図2には、空気調和機10の外観の一例が示されている。図2に示されている空気調和機10では、室内機30が室内の壁面等に取り付けられ、室外機20が室外に据え付けられている。図2に示されている室内機30は、壁掛け型である。室外機20と室内機30を連絡しているのは、配管部材14である。配管部材14の中には、冷媒配管12,13が通っている。また、冷媒配管12,13以外に、例えば室外機20と室内機30に接続されている電線及び信号線(図示せず)が配管部材14の中を通っている。 FIG. 2 shows an example of the appearance of the air conditioner 10. In the air conditioner 10 shown in FIG. 2, the indoor unit 30 is attached to a wall surface or the like indoors, and the outdoor unit 20 is installed outdoors. The indoor unit 30 shown in FIG. 2 is of a wall-mounted type. The piping member 14 connects the outdoor unit 20 and the indoor unit 30. Refrigerant pipes 12 and 13 pass through the pipe member 14 . In addition to the refrigerant pipes 12 and 13 , for example, electric wires and signal lines (not shown) connected to the outdoor unit 20 and the indoor unit 30 pass through the piping member 14 .
 (1-1)冷房運転における冷媒の循環
 冷房運転では、圧縮機21で圧縮されたガス冷媒が、四方弁22を通って室外熱交換ユニット23に送られる。冷媒は、室外熱交換ユニット23で室外の空気に放熱し、膨張弁24で膨張して減圧され、冷媒配管13を通って室内機30の熱交換器31に送られる。膨張弁24から室内機30の熱交換器31に送られてきた低温低圧の冷媒は、熱交換器31で熱交換を行って、室内の空気から熱を奪う。室内機30の熱交換器31で熱交換を終えたガス冷媒または気液二相状態の冷媒は、冷媒配管12、四方弁22及びアキュムレータ25を通って圧縮機21に吸入される。室内機30の熱交換器31で熱を奪われた調和空気が室内機30から例えば室内に吹出されることにより、室内の冷房が行われる。
(1-1) Circulation of refrigerant in cooling operation In cooling operation, gas refrigerant compressed by the compressor 21 is sent to the outdoor heat exchange unit 23 through the four-way valve 22. The refrigerant radiates heat to outdoor air in the outdoor heat exchange unit 23, expands and is depressurized in the expansion valve 24, and is sent to the heat exchanger 31 of the indoor unit 30 through the refrigerant pipe 13. The low-temperature, low-pressure refrigerant sent from the expansion valve 24 to the heat exchanger 31 of the indoor unit 30 exchanges heat with the heat exchanger 31 to remove heat from the indoor air. The gas refrigerant or gas-liquid two-phase refrigerant that has completed heat exchange in the heat exchanger 31 of the indoor unit 30 is sucked into the compressor 21 through the refrigerant pipe 12, the four-way valve 22, and the accumulator 25. Conditioned air from which heat has been removed by the heat exchanger 31 of the indoor unit 30 is blown out from the indoor unit 30 into the room, for example, thereby cooling the room.
 (1-2)暖房運転における冷媒の循環
 暖房運転では、圧縮機21で圧縮されたガス冷媒が、四方弁22、冷媒配管12を通って室内機30の熱交換器31に送られる。室内機30の熱交換器31では、圧縮機21から送られてきた冷媒が空気と熱交換を行って室内の空気に熱を与える。熱交換器31で熱交換を終えた冷媒は、冷媒配管13を通って膨張弁24に送られる。膨張弁24で膨張して減圧された低温低圧の冷媒は、室外熱交換ユニット23に送られ、室外熱交換ユニット23で室外の空気と熱交換を行って空気から熱を得る。室外熱交換ユニット23で熱交換を終えたガス冷媒または気液二相状態の冷媒は、四方弁22及びアキュムレータ25を通って圧縮機21に吸入される。室内機30の熱交換器31で熱を与えられた調和空気が室内機30から例えば室内に吹出されることにより、室内の暖房が行われる。
(1-2) Circulation of refrigerant in heating operation In heating operation, gas refrigerant compressed by the compressor 21 is sent to the heat exchanger 31 of the indoor unit 30 through the four-way valve 22 and the refrigerant pipe 12. In the heat exchanger 31 of the indoor unit 30, the refrigerant sent from the compressor 21 exchanges heat with the air and gives heat to the indoor air. The refrigerant that has undergone heat exchange in the heat exchanger 31 is sent to the expansion valve 24 through the refrigerant pipe 13. The low-temperature, low-pressure refrigerant expanded and depressurized by the expansion valve 24 is sent to the outdoor heat exchange unit 23, where it exchanges heat with outdoor air to obtain heat from the air. The gas refrigerant or gas-liquid two-phase refrigerant that has undergone heat exchange in the outdoor heat exchange unit 23 passes through the four-way valve 22 and the accumulator 25 and is sucked into the compressor 21 . Conditioned air heated by the heat exchanger 31 of the indoor unit 30 is blown out from the indoor unit 30 into the room, thereby heating the room.
 (1-3)空気の流れ
 室外機20が室外ファン28を備え、室内機30が室内ファン32を備えている。室外ファン28は、冷房運転モード及び暖房運転モードにおいて、室外熱交換ユニット23での空気と冷媒との熱交換を促進するために、空気を室外熱交換ユニット23に供給する。また、室内ファン32は、冷房運転モード及び暖房運転モードにおいて、熱交換器31での空気と冷媒との熱交換を促進するために、室内の空気を熱交換器31に供給する。
(1-3) Air Flow The outdoor unit 20 includes an outdoor fan 28, and the indoor unit 30 includes an indoor fan 32. The outdoor fan 28 supplies air to the outdoor heat exchange unit 23 in order to promote heat exchange between the air and the refrigerant in the outdoor heat exchange unit 23 in the cooling operation mode and the heating operation mode. Moreover, the indoor fan 32 supplies indoor air to the heat exchanger 31 in order to promote heat exchange between the air and the refrigerant in the heat exchanger 31 in the cooling operation mode and the heating operation mode.
 (2)詳細構成
 (2-1)室内機
 図3には、室内機30の長手方向に対して垂直な面で切断した場合の室内機30の断面構造の一例が示されている。図3に示されている室内機30において、壁WLの側が後側、その反対側が前側、壁WLに沿う方向が鉛直方向であり、鉛直方向の上方(上側)と下方(下側)があって、図3では矢印で方向が示されている。図3に示されているように、室内機30は、熱交換器31と、室内ファン32と、ケーシング33と、エアフィルタ34と、ドレンパン36と、フラップ37とを備えている。また、室内機30は、例えば、室内の気温を検知する温度センサ(図示せず)、室内の湿度を検知する湿度センサ(図示せず)及びその他のセンサを備えている。温度センサなどの各種センサ及び室内ファン32は、制御装置(図示せず)に接続されている。熱交換器31の下には、ドレンパン36が配置されている。熱交換器31で発生した結露は、ドレンパン36で受け止められる。
(2) Detailed configuration (2-1) Indoor unit FIG. 3 shows an example of a cross-sectional structure of the indoor unit 30 when cut along a plane perpendicular to the longitudinal direction of the indoor unit 30. In the indoor unit 30 shown in FIG. 3, the wall WL side is the rear side, the opposite side is the front side, the direction along the wall WL is the vertical direction, and there is an upper side (upper side) and a lower side (lower side) in the vertical direction. In FIG. 3, directions are indicated by arrows. As shown in FIG. 3, the indoor unit 30 includes a heat exchanger 31, an indoor fan 32, a casing 33, an air filter 34, a drain pan 36, and a flap 37. In addition, the indoor unit 30 includes, for example, a temperature sensor (not shown) that detects indoor air temperature, a humidity sensor (not shown) that detects indoor humidity, and other sensors. Various sensors such as a temperature sensor and the indoor fan 32 are connected to a control device (not shown). A drain pan 36 is arranged below the heat exchanger 31. Condensation generated in the heat exchanger 31 is collected by the drain pan 36.
 (2-1-1)ケーシング
 ケーシング33には、吸込口33aと吹出口33bが形成されている。室内機30は、上方に位置する吸込口33aからケーシング33の中に室内空気を吸い込んで、下方に位置する吹出口33bから調和空気を吹き出す。図3の状態はフラップ37が吹出口33bを塞いでいる状態である。調和空気が吹出口33bから吹き出すときは、フラップ37が回転して吹出口33bが開く。ケーシング33の面のうち、壁WLに接する面が背面33Rであり、背面33Rとは反対側に位置する面が前面33Fである。ケーシング33の中には、吸込口33aから吹出口33bに向う室内空気の流路において、吸込口33aに近い位置(気流の上流)から、エアフィルタ34、熱交換器31、室内ファン32、フラップ37が順に配置されている。
(2-1-1) Casing The casing 33 is formed with an inlet 33a and an outlet 33b. The indoor unit 30 sucks indoor air into the casing 33 from the suction port 33a located above, and blows out conditioned air from the blow-off port 33b located below. In the state shown in FIG. 3, the flap 37 is blocking the air outlet 33b. When conditioned air is blown out from the outlet 33b, the flap 37 rotates to open the outlet 33b. Among the surfaces of the casing 33, the surface in contact with the wall WL is the back surface 33R, and the surface located on the opposite side to the back surface 33R is the front surface 33F. Inside the casing 33, an air filter 34, a heat exchanger 31, an indoor fan 32, and a flap are installed in the indoor air flow path from the inlet 33a to the outlet 33b, starting from a position close to the inlet 33a (upstream of the airflow). 37 are arranged in order.
 (2-1-2)エアフィルタ
 熱交換器31に供給される室内空気は、実質的に全てエアフィルタ34を通過する。エアフィルタ34の網目よりも大きな塵埃は、エアフィルタ34で除去される。
(2-1-2) Air Filter Substantially all of the indoor air supplied to the heat exchanger 31 passes through the air filter 34. Dust larger than the mesh of the air filter 34 is removed by the air filter 34.
 (2-1-3)熱交換器
 エアフィルタ34の下流に位置する熱交換器31は、正面から見て、図2に示されているケーシング33と同様に、左右方向(水平方向)に長く延びている。言い換えると、熱交換器31は、正面視において、垂直方向の長さよりも水平方向の長さが長い。熱交換器31は、前面33Fに近い第1熱交換部31Fと背面33Rに近い第2熱交換部31Rを含んでいる。第1熱交換部31Fは、上部第1熱交換部31FUと下部第1熱交換部31FLとを含んでいる。上部第1熱交換部31FUと下部第1熱交換部31FLは、室内ファン32を囲むように配置するために、異なる方向に傾けて取り付けられている。上部第1熱交換部31FUは、下に行くに従ってケーシング33の前面33Fに近づくように傾いている。逆に、下部第1熱交換部31FLは、下に行くに従ってケーシング33の前面33Fから遠ざかるように傾いている。熱交換器31は、図3に示されているように、複数の伝熱管31bを有している。熱交換器31は伝熱管31bの延びる方向に見て(側面視において)、室内ファン32の上方を覆うように、下に向って開いた形状を呈する。ここでは、このような形状をΛ形状またはC字形状と呼ぶ。
(2-1-3) Heat exchanger When viewed from the front, the heat exchanger 31 located downstream of the air filter 34 is long in the left-right direction (horizontal direction), similar to the casing 33 shown in FIG. It is extending. In other words, the heat exchanger 31 has a horizontal length longer than a vertical length when viewed from the front. The heat exchanger 31 includes a first heat exchange section 31F near the front surface 33F and a second heat exchange section 31R near the back surface 33R. The first heat exchange section 31F includes an upper first heat exchange section 31FU and a lower first heat exchange section 31FL. The upper first heat exchange section 31FU and the lower first heat exchange section 31FL are attached so as to be inclined in different directions so as to surround the indoor fan 32. The upper first heat exchange section 31FU is inclined so as to approach the front surface 33F of the casing 33 as it goes downward. Conversely, the lower first heat exchange section 31FL is inclined so as to move away from the front surface 33F of the casing 33 as it goes downward. As shown in FIG. 3, the heat exchanger 31 has a plurality of heat exchanger tubes 31b. The heat exchanger 31 has a shape that opens downward so as to cover the upper part of the indoor fan 32 when viewed in the direction in which the heat exchanger tubes 31b extend (in side view). Here, such a shape is referred to as a Λ shape or a C-shape.
 図3には、第1熱交換部31Fのフィン31aを断面円形状の複数の伝熱管31bが貫通している状態及び、第2熱交換部31Rのフィン31aを断面円形状の複数の伝熱管31bが貫通している状態が示されている。第1熱交換部31F及び第2熱交換部31Rのフィン31aは、いずれも伝熱管31bが延びている方に、複数枚重ねて配置されている。これら複数の伝熱管31bと複数のフィン31aは熱的に接続されている。それにより、複数のフィン31aの間を流れる空気と複数の伝熱管31bの中を流れる冷媒の間で、フィン31aと伝熱管31bを介して熱が移動する。 FIG. 3 shows a state in which a plurality of heat transfer tubes 31b having a circular cross section pass through the fins 31a of the first heat exchange section 31F, and a state in which a plurality of heat transfer tubes having a circular cross section pass through the fins 31a of the second heat exchange section 31R. 31b is shown passing through. A plurality of fins 31a of the first heat exchange section 31F and the second heat exchange section 31R are stacked on each other in the direction in which the heat exchanger tubes 31b extend. The plurality of heat exchanger tubes 31b and the plurality of fins 31a are thermally connected. Thereby, heat is transferred between the air flowing between the plurality of fins 31a and the refrigerant flowing in the plurality of heat transfer tubes 31b via the fins 31a and the heat transfer tubes 31b.
 複数の伝熱管31bには、複数のU字管(図示せず)が接続されている。例えば、2本の伝熱管31bの一端には、1つのU字管が接続されている。熱交換の際には、複数のフィン31aの間を空気が通過すると同時に、複数の伝熱管31bの中を冷媒が流れる。複数の伝熱管31bの中を流れる冷媒は、熱媒体の一種である。例えば、ある伝熱管31bを流れた冷媒は、U字管で折り返されて、他の伝熱管31bに流れる。また、他の伝熱管31bの他端は、他のU字管を介してさらに他の伝熱管31bに接続されている。他の伝熱管31bを流れた冷媒が他のU字管を介してさらに他の伝熱管31bに流れる。このように、冷媒は、複数のU字管で何度も折り返されて複数の伝熱管31bを流れ、各フィン31aを複数回通り抜けるように流れる。 A plurality of U-shaped tubes (not shown) are connected to the plurality of heat transfer tubes 31b. For example, one U-shaped tube is connected to one end of the two heat transfer tubes 31b. During heat exchange, air passes between the plurality of fins 31a, and at the same time, a refrigerant flows through the plurality of heat transfer tubes 31b. The refrigerant flowing through the plurality of heat transfer tubes 31b is a type of heat medium. For example, the refrigerant flowing through a certain heat exchanger tube 31b is turned around at a U-shaped tube and flows to another heat exchanger tube 31b. Further, the other end of the other heat exchanger tube 31b is further connected to another heat exchanger tube 31b via another U-shaped tube. The refrigerant that has flowed through the other heat exchanger tube 31b further flows to the other heat exchanger tube 31b via another U-shaped tube. In this way, the refrigerant is turned back many times through the plurality of U-shaped tubes, flows through the plurality of heat transfer tubes 31b, and flows through each fin 31a a plurality of times.
 (2-1-4)室内ファン
 Λ形の熱交換器31に囲まれるように、熱交換器31の下流に室内ファン32が配置されている。図3に示された室内ファン32は、伝熱管31bの延びる方向に沿って配置されているクロスフローファンである。室内ファン32は、伝熱管31bに対して直交する向きの気流を発生させる。室内ファン32は、回転速度を変更できるモータ(図示せず)を備えており、クロスフローファンの回転速度を変更することで風量を変更できる。
(2-1-4) Indoor fan An indoor fan 32 is arranged downstream of the heat exchanger 31 so as to be surrounded by the Λ-shaped heat exchanger 31. The indoor fan 32 shown in FIG. 3 is a cross-flow fan arranged along the direction in which the heat exchanger tubes 31b extend. The indoor fan 32 generates an airflow in a direction perpendicular to the heat exchanger tube 31b. The indoor fan 32 includes a motor (not shown) that can change the rotation speed, and the air volume can be changed by changing the rotation speed of the cross flow fan.
 (2-1-5)フラップ
 吹出口33bには、フラップ37が配置されている。フラップ37には、例えば、図3に図示された水平フラップと、垂直フラップ(図示せず)が含まれる。水平フラップは、吹出口33bから吹出される空気の風向を上下に変更する。垂直フラップは、吹出口33bから吹出される空気の風向を左右に変更する。
(2-1-5) Flap A flap 37 is arranged at the air outlet 33b. Flaps 37 include, for example, the horizontal flaps illustrated in FIG. 3 and the vertical flaps (not shown). The horizontal flap vertically changes the direction of air blown out from the outlet 33b. The vertical flap changes the direction of air blown out from the outlet 33b to the left or right.
 (3)熱交換器のフィン
 図4には、上部第1熱交換部31FUのフィン31aの一部が拡大して示されている。図5には、下部第1熱交換部31FLのフィン31aの一部が拡大して示されている。上部第1熱交換部31FUのフィン31aの構造を説明し易くするために、上部第1熱交換部31FUのフィン31aを、第1フィン310と呼び、下部第1熱交換部31FLのフィン31aを、第2フィン320と呼ぶ。また、第1フィン310及び第2フィン320をそれぞれ貫通する複数の伝熱管31bの中の1つの伝熱管31bを第1伝熱管211と呼び、その下の伝熱管31bを第2伝熱管212と呼んで説明する。図6には、フィン31a(第1フィン310または第2フィン320)と第1伝熱管211と第2伝熱管212の断面の一部が拡大して示されている。第2伝熱管212は、第1伝熱管211の鉛直方向下方に隣り合って配置されている。
(3) Fins of heat exchanger FIG. 4 shows a part of the fins 31a of the upper first heat exchange section 31FU in an enlarged manner. FIG. 5 shows a part of the fins 31a of the lower first heat exchange section 31FL in an enlarged manner. To make it easier to explain the structure of the fins 31a of the first upper heat exchange section 31FU, the fins 31a of the first upper heat exchange section 31FU will be referred to as first fins 310, and the fins 31a of the first lower heat exchange section 31FL will be referred to as first fins 310. , is called a second fin 320. Further, one heat exchanger tube 31b among the plurality of heat exchanger tubes 31b passing through the first fin 310 and the second fin 320 is called the first heat exchanger tube 211, and the heat exchanger tube 31b below it is called the second heat exchanger tube 212. Call me and explain. FIG. 6 shows a partially enlarged cross section of the fin 31a (the first fin 310 or the second fin 320), the first heat exchanger tube 211, and the second heat exchanger tube 212. The second heat exchanger tube 212 is arranged vertically below and adjacent to the first heat exchanger tube 211 .
 第1フィン310及び第2フィン320は、それぞれ、第1フィンカラー111と、第2フィンカラー112と、切起部120と、導水部410とを備えている。第1フィンカラー111は、第1伝熱管211に密着する。第2フィンカラー112は、第2伝熱管212に密着する。第2フィンカラー112は、第1フィンカラー111よりも鉛直方向下方に隣り合って配置されている。第1フィンカラー111と第2フィンカラー112は、フィン31aのフィン表面31sから立ち上がっている部分である。ここで、第2フィンカラー112が第1フィンカラー111の鉛直方向下方に配置されているというときは、第2フィンカラー112が第1フィンカラー111よりも鉛直方向において下にあればよい。鉛直方向下方に配置されているとは、真下に配置されている場合に限る意味ではない。例えば、第2フィンカラー112が、鉛直方向に見て、第1フィンカラー111の斜め下にあってもよい。第2伝熱管212が第1伝熱管211の鉛直方向下方に配置されているというときも、第2フィンカラー112が第1フィンカラー111の鉛直方向下方に配置されているという場合と同様である。 The first fin 310 and the second fin 320 each include a first fin collar 111, a second fin collar 112, a raised part 120, and a water guide part 410. The first fin collar 111 is in close contact with the first heat exchanger tube 211 . The second fin collar 112 is in close contact with the second heat exchanger tube 212. The second fin collar 112 is arranged vertically below and adjacent to the first fin collar 111 . The first fin collar 111 and the second fin collar 112 are portions rising from the fin surface 31s of the fin 31a. Here, when it is said that the second fin collar 112 is arranged below the first fin collar 111 in the vertical direction, it is sufficient that the second fin collar 112 is located below the first fin collar 111 in the vertical direction. The phrase "disposed vertically downward" does not mean that it is disposed directly below. For example, the second fin collar 112 may be located diagonally below the first fin collar 111 when viewed in the vertical direction. When it is said that the second heat exchanger tube 212 is arranged vertically below the first heat exchanger tube 211, it is the same as when it is said that the second fin collar 112 is arranged vertically below the first fin collar 111. .
 切起部120は、第1伝熱管211の貫通方向DR1に切り起されている。図4~図6に示されている切起部120は、全体が貫通方向DR1の同じ向きにフィン表面31sから突出しているブリッジ型の切起しである。ここで、切起部120が延びる方向を長手方向DR2いうとする。そうすると、切起しの形成された箇所には、貫通方向DR1及び長手方向DR2に対して直交する方向DR3に見て、開口部130が形成されている(図6参照)。この開口部130により、切起部120は、フィン表面31sに沿う気流を通過させる。前述の方向DR3は、概ね気流が通過する方向に一致する。第1フィンカラー111と切起部120との間の距離は、0よりも大きく5mm以下である。 The cut and raised portion 120 is cut and raised in the penetrating direction DR1 of the first heat exchanger tube 211. The cut-and-raised portions 120 shown in FIGS. 4 to 6 are bridge-shaped cut-and-raised portions that project from the fin surface 31s in the same direction as the penetration direction DR1. Here, the direction in which the cut and raised portion 120 extends is referred to as the longitudinal direction DR2. Then, an opening 130 is formed at the location where the cut and raised portion is formed when viewed in the direction DR3 orthogonal to the penetration direction DR1 and the longitudinal direction DR2 (see FIG. 6). This opening 130 allows the cut and raised portion 120 to pass the airflow along the fin surface 31s. The aforementioned direction DR3 generally corresponds to the direction in which the airflow passes. The distance between the first fin collar 111 and the cut-and-raised portion 120 is greater than 0 and less than or equal to 5 mm.
 導水部410は、フィン31aのフィン表面31sに設けられている。図4~図6に示されている導水部410は、リブである。このように、導水部410は、フィン31aを凸状に変形させた構造を有する。リブが形成されないフィン表面31sを流れる結露水の流れは定まらないが、フィン表面31sにリブが形成されていると、リブを伝って多くの結露水が流れる。このリブは、周囲のフィン表面31sよりも結露水を導き易い導水部410である。導水部410のリブの高さh1は、0.05mm以上であって且つフィンピッチの半分以下である。 The water guide portion 410 is provided on the fin surface 31s of the fin 31a. The water guide portion 410 shown in FIGS. 4 to 6 is a rib. In this way, the water guiding portion 410 has a structure in which the fins 31a are deformed into a convex shape. Although the flow of condensed water flowing on the fin surface 31s without ribs is not fixed, if ribs are formed on the fin surface 31s, a large amount of condensed water flows along the ribs. This rib is a water guide portion 410 that guides dew condensation water more easily than the surrounding fin surface 31s. The height h1 of the ribs of the water guide portion 410 is 0.05 mm or more and less than half the fin pitch.
 導水部410は、第1フィンカラー111から離れて配置されている。導水部410は、第1フィンカラー111から第2フィンカラー112へ向かう方向に沿って延びている。第1フィンカラー111から第2フィンカラー112へ向かう方向に沿って延びる場合には、導水部410が第1フィンカラー111の第1点Po1と第2フィンカラー112の第2点Po2を通る直線Ln1(図4及び図5参照)に平行な場合だけでなく、直線Ln1に対して±45度の範囲で傾いた方向へ延びていてもよい。また、第1フィンカラー111から第2フィンカラー112へ向かう方向に沿って延びる場合には、導水部410の延長線が第2フィンカラー112を横切らない場合も含まれる。導水部410は、第1フィンカラー111の近傍に、第1フィンカラー111からは離れて配置されている第1始点SP1を有している。導水部410の第1始点SP1は、第1フィンカラー111と切起部120の間の結露水が溜まる第1領域AR1に配置されている。第1始点SP1は、第1フィンカラー111から離れて配置され、第1始点SP1から第1フィンカラー111までの距離は、0.1mm~1mmの範囲内で設定される。第1領域AR1は、図4及び図5に斜線で示されている。導水部410は、切起部120から離れる方向に第1始点SP1より延びる第1部分411を有する。 The water guide section 410 is arranged apart from the first fin collar 111. The water guide portion 410 extends along the direction from the first fin collar 111 to the second fin collar 112. When extending along the direction from the first fin collar 111 to the second fin collar 112, the water guide portion 410 is a straight line passing through the first point Po1 of the first fin collar 111 and the second point Po2 of the second fin collar 112. It may extend not only in parallel to Ln1 (see FIGS. 4 and 5) but also in a direction inclined within a range of ±45 degrees with respect to straight line Ln1. Further, in the case of extending along the direction from the first fin collar 111 to the second fin collar 112, the case where the extension line of the water guide portion 410 does not cross the second fin collar 112 is also included. The water guide portion 410 has a first starting point SP1 located near the first fin collar 111 and apart from the first fin collar 111. The first starting point SP1 of the water guide portion 410 is arranged in the first region AR1 where dew condensation water accumulates between the first fin collar 111 and the cut and raised portion 120. The first starting point SP1 is located apart from the first fin collar 111, and the distance from the first starting point SP1 to the first fin collar 111 is set within a range of 0.1 mm to 1 mm. The first region AR1 is indicated by diagonal lines in FIGS. 4 and 5. The water guide portion 410 has a first portion 411 extending from the first starting point SP1 in a direction away from the cut and raised portion 120.
 (3-1)第1領域
 第1フィンカラー111と第2フィンカラー112の間に配置されている切起部120は、第1切起部121とみなすことができる。第1領域AR1は、第1フィンカラー111と、第1切起部121と、第1線分LS1と、第2線分LS2とに囲まれている領域である。
(3-1) First Region The cut-and-raised portion 120 located between the first fin collar 111 and the second fin collar 112 can be regarded as the first cut-and-raised portion 121 . The first region AR1 is a region surrounded by the first fin collar 111, the first cut and raised portion 121, the first line segment LS1, and the second line segment LS2.
 第1切起部121は、第1切断線CL1と第2切断線CL2を有している。第1切断線CL1は、第1直線Ln1に沿って延びていて第1直線Ln1に近い方であり、第2切断線CL2は、第1直線Ln1に沿って延びていて第1直線Ln1に遠い方である。第1直線Ln1は、第1フィンカラー111の第1点Po1と、第2フィンカラー112の第2点Po2とを通る直線である。第1点Po1は、第1フィンカラー111において、第2フィンカラー112に最も近い所にある。第2点Po2は、第2フィンカラー112において、第1フィンカラー111に最も近い所にある。第1点Po1と第2点Po2は、第1フィンカラー111とフィン表面31sの境界部分及び、第2フィンカラー112とフィン表面31sの境界部分にある(図6参照)。 The first cut and raised portion 121 has a first cutting line CL1 and a second cutting line CL2. The first cutting line CL1 extends along the first straight line Ln1 and is close to the first straight line Ln1, and the second cutting line CL2 extends along the first straight line Ln1 and is far from the first straight line Ln1. That's the way to go. The first straight line Ln1 is a straight line passing through the first point Po1 of the first fin collar 111 and the second point Po2 of the second fin collar 112. The first point Po1 is located on the first fin collar 111 closest to the second fin collar 112. The second point Po2 is located on the second fin collar 112 closest to the first fin collar 111. The first point Po1 and the second point Po2 are located at the boundary between the first fin collar 111 and the fin surface 31s and at the boundary between the second fin collar 112 and the fin surface 31s (see FIG. 6).
 第1線分LS1は、第1点Po1と第1切断線CL1の中点MP1とを結ぶ線分である。第2線分LS2は、第2切断線CL2の上端点UP1と第3点Po3とを結ぶ線分である。第3点Po3は、第1直線Ln1から最も遠く且つ第1切起部121に近い位置にある第1フィンカラー111の中の点である。 The first line segment LS1 is a line segment connecting the first point Po1 and the midpoint MP1 of the first cutting line CL1. The second line segment LS2 is a line segment that connects the upper end point UP1 of the second cutting line CL2 and the third point Po3. The third point Po3 is a point in the first fin collar 111 located farthest from the first straight line Ln1 and closest to the first cut and raised portion 121.
 (3-2)第2領域
 フィン31aは、第2切起部122を備えている。第2切起部122は、第2直線Ln2と交差するように配置されている。第2直線Ln2は、第3点Po3と第4点Po4とを通る直線である。第4点Po4は、第1フィンカラー111の中で第1直線Ln1から最も遠く且つ第1切起部121から遠い位置にある。
(3-2) Second Region The fin 31a includes a second cut and raised portion 122. The second cut and raised portion 122 is arranged to intersect with the second straight line Ln2. The second straight line Ln2 is a straight line passing through the third point Po3 and the fourth point Po4. The fourth point Po4 is located in the first fin collar 111 at a position farthest from the first straight line Ln1 and farthest from the first cut and raised portion 121.
 導水部410は、第2領域AR2に第2始点SP2を有する。第2領域AR2は、第1フィンカラー111と、第2切起部122と、第3線分LS3と、第4線分LS4とに囲まれている領域である。図4及び図5において、第2領域AR2には斜線が施されている。導水部410は、第2部分412を有する。第2部分412は、第2切起部122から離れる方向に第2始点SP2より延びている。第2始点SP2は、第1フィンカラー111から離れて配置され、第2始点SP2から第1フィンカラー111までの距離は、0.1mm~1mmの範囲内で設定される。 The water guide section 410 has a second starting point SP2 in the second region AR2. The second region AR2 is a region surrounded by the first fin collar 111, the second cut and raised portion 122, the third line segment LS3, and the fourth line segment LS4. In FIGS. 4 and 5, the second region AR2 is shaded. The water guide section 410 has a second portion 412. The second portion 412 extends from the second starting point SP2 in a direction away from the second cut and raised portion 122. The second starting point SP2 is located apart from the first fin collar 111, and the distance from the second starting point SP2 to the first fin collar 111 is set within a range of 0.1 mm to 1 mm.
 第2切起部122は、第1直線Ln1に沿って延びていて前記第1直線に近い第3切断線CL3を有している。第3線分LS3は、第1点Po1と第3切断線CL3の下端点LP1とを結ぶ線分である。第4線分LS4は、第5点Po5と第4点Po4とを結ぶ線分である。第5点Po5は、第3切断線CL3の中で第4点Po4に最も近い点である。 The second cut-and-raised portion 122 has a third cutting line CL3 that extends along the first straight line Ln1 and is close to the first straight line. The third line segment LS3 is a line segment connecting the first point Po1 and the lower end point LP1 of the third cutting line CL3. The fourth line segment LS4 is a line segment connecting the fifth point Po5 and the fourth point Po4. The fifth point Po5 is the closest point to the fourth point Po4 on the third cutting line CL3.
 (3-3)導水部の形状
 図4及び図5に示されている導水部410は、第1直線Ln1に対して傾斜して延びている直線形状を有する。導水部410であるリブが第1直線Ln1に対する傾斜角度は、10度~45度の範囲内で設定される。図4及び図5に示されている導水部410は、直線形状を有するが、曲線形状であってもよい。曲線形状の導水部410は、接線が第1直線に対して傾斜するように延びている。曲線形状の導水部410は、接線が第1直線Ln1に対する傾斜角度は、10度~45度の範囲内で設定される。
(3-3) Shape of water guide section The water guide section 410 shown in FIGS. 4 and 5 has a linear shape that extends obliquely with respect to the first straight line Ln1. The angle of inclination of the rib, which is the water guide portion 410, with respect to the first straight line Ln1 is set within the range of 10 degrees to 45 degrees. Although the water guide portion 410 shown in FIGS. 4 and 5 has a linear shape, it may have a curved shape. The curved water guide portion 410 extends so that its tangent line is inclined with respect to the first straight line. The angle of inclination of the tangent of the curved water guiding portion 410 to the first straight line Ln1 is set within the range of 10 degrees to 45 degrees.
 図4及び図5に示されている導水部410は、第1フィンカラー111に近づくにつれて互いに間隔が広がる二又に分かれたY字形の形状を有する。二又に分かれている部分が、第1部分411と第2部分412である。第1部分411と第2部分412は鉛直上方に行くに従って間隔が広がっている。 The water guide portion 410 shown in FIGS. 4 and 5 has a Y-shaped shape divided into two parts whose distance becomes wider as they approach the first fin collar 111. The parts that are divided into two are a first part 411 and a second part 412. The distance between the first portion 411 and the second portion 412 increases as it goes vertically upward.
 図5に示されている導水部410は、第2フィンカラー112の上端の第6点Po6よりも切起部120(第1切起部121)から遠い位置で且つ第2フィンカラー112から離れた位置に終点EP1が配置されている。 The water guide portion 410 shown in FIG. 5 is located at a position farther from the cut-and-raised portion 120 (first cut-and-raised portion 121) than the sixth point Po6 at the upper end of the second fin collar 112, and further from the second fin collar 112. The end point EP1 is located at the position shown in FIG.
 (4)変形例
 (4-1)変形例A
 上記実施形態では、切起部120がブリッジ型の切起しで形成されている場合について説明した。しかし、切起部120は、図7に示されているようなルーバー型の切起しでもよい。ルーバー型の切起しは、第1切断線CL1をフィン表面31sから突出するように持ち上げ、第2切断線CL2をフィン表面31sから沈み込むように押し下げる。このような構造によって、第1切断線CL1とフィン表面31sとの間に開口部130が形成される。フィン表面31sに沿って切起部120に到達した気流AFは、開口部130を通ってフィン31aの裏側に流れる。
(4) Modification example (4-1) Modification example A
In the embodiment described above, the case where the cut and raised portion 120 is formed by a bridge type cut and raised portion has been described. However, the cut-and-raised part 120 may be a louver-shaped cut-and-raised part as shown in FIG. The louver-shaped cut and raise lifts the first cutting line CL1 so as to protrude from the fin surface 31s, and pushes down the second cutting line CL2 so as to sink from the fin surface 31s. With such a structure, an opening 130 is formed between the first cutting line CL1 and the fin surface 31s. The airflow AF that has reached the cut and raised portion 120 along the fin surface 31s flows to the back side of the fin 31a through the opening 130.
 (4-2)変形例B
 図8には、上記実施形態とは異なる形状の導水部410が示されている。導水部410は、気流AFを切起部120の範囲外から切起部120の範囲内に向ける形状である第2部分412及び第3部分413を有する。第2部分412は、長手方向DR2において、切起部120の中央部よりも第1フィンカラー111に近い側に設けられている。第2部分412は、長手方向DR2において、第1フィンカラー111に近い側から切起部120の中央部に近い側に行くに従って徐々に切起部120に近づく形状を有している。第3部分413は、長手方向DR2において、切起部120の中央部よりも第2フィンカラー112に近い側に設けられている。第3部分413は、長手方向DR2において、第2フィンカラー112に近い側から切起部120の中央部に近い側に行くに従って徐々に切起部120に近づく形状を有している。図8の導水部410は、X字形の形状を有している。ただし、導水部410は、第4部分414を有していなくても、気流AFを切起部120の範囲外から切起部120の範囲内に向ける形状になる。第4部分414は、第2フィンカラー112及び切起部120に近い部分である。なお、図8のフィン31aは、上部第1熱交換部31FUに適用される場合には、図4に示されているように傾けて取り付けられてもよい。また、図8のフィン31aは、下部第1熱交換部31FLに適用される場合には、図5に示されているように傾けて取り付けられてもよい。
(4-2) Modification B
FIG. 8 shows a water guide portion 410 having a shape different from that of the above embodiment. The water guiding portion 410 has a second portion 412 and a third portion 413 that are shaped to direct the airflow AF from outside the range of the cut and raised portion 120 to within the range of the cut and raised portion 120 . The second portion 412 is provided closer to the first fin collar 111 than the central portion of the cut and raised portion 120 in the longitudinal direction DR2. The second portion 412 has a shape that gradually approaches the cut and raised portion 120 from the side closer to the first fin collar 111 to the side closer to the center of the cut and raised portion 120 in the longitudinal direction DR2. The third portion 413 is provided closer to the second fin collar 112 than the central portion of the cut and raised portion 120 in the longitudinal direction DR2. The third portion 413 has a shape that gradually approaches the cut and raised portion 120 as it goes from the side closer to the second fin collar 112 to the side closer to the center of the cut and raised portion 120 in the longitudinal direction DR2. The water guide section 410 in FIG. 8 has an X-shape. However, even if the water guiding portion 410 does not include the fourth portion 414, it has a shape that directs the airflow AF from outside the range of the cut and raised portion 120 to within the range of the cut and raised portion 120. The fourth portion 414 is a portion close to the second fin collar 112 and the cut and raised portion 120. In addition, when the fin 31a of FIG. 8 is applied to the upper first heat exchange section 31FU, it may be attached at an angle as shown in FIG. 4. Furthermore, when the fins 31a in FIG. 8 are applied to the lower first heat exchange section 31FL, they may be attached at an angle as shown in FIG. 5.
 (4-3)変形例C
 図9には、上記実施形態とは異なる形状の導水部410が示されている。図9の導水部410は、図4の導水部410と比べると、第1部分411及び第2部分412以外の箇所に、破線形状の部分415を有している点が異なる。この破線形状の部分415は、短い凸形状が間隔を置いて連なっている部分である。図9の破線形状の部分415は、短いリブが飛び石のように連なっているもの、或いは長いリブの一部をフィン表面31sと面一の形状にしたものと考えることができる。なお、図9の導水部410は、第1フィンカラー111に近づくにつれて互いに間隔が広がる2本に分かれた形状である第1部分411と第2部分412を有するものである。また、図9のフィン31aは、上部第1熱交換部31FUに適用される場合には、図4に示されているように傾けて取り付けられてもよい。また、図9のフィン31aは、下部第1熱交換部31FLに適用される場合には、図5に示されているように傾けて取り付けられてもよい。
(4-3) Modification C
FIG. 9 shows a water guide portion 410 having a shape different from that of the above embodiment. The water guide section 410 in FIG. 9 differs from the water guide section 410 in FIG. 4 in that it has a broken line-shaped section 415 at a location other than the first section 411 and the second section 412. This broken line-shaped portion 415 is a portion in which short convex shapes are connected at intervals. The broken line-shaped portion 415 in FIG. 9 can be considered to be a series of short ribs like stepping stones, or a part of a long rib that is flush with the fin surface 31s. Note that the water guide section 410 in FIG. 9 has a first portion 411 and a second portion 412 that are separated into two parts, the distance from which increases as they approach the first fin collar 111. Moreover, when the fin 31a of FIG. 9 is applied to the upper first heat exchange section 31FU, the fin 31a may be attached at an angle as shown in FIG. 4. Furthermore, when the fins 31a in FIG. 9 are applied to the lower first heat exchange section 31FL, they may be attached at an angle as shown in FIG. 5.
 (4-4)変形例D
 図10には、図9の導水部410とは異なる形状の導水部410が示されている。図10の導水部410は、図9の導水部410と比べると、第1部分411に、破線形状の部分416を有している点が異なる。この破線形状の部分416は、短い凸形状が間隔を置いて連なっている部分である。図10の破線形状の部分416は、短いリブが飛び石のように連なっているもの、或いは長いリブの一部をフィン表面31sと面一の形状にしたものと考えることができる。なお、図10のフィン31aは、上部第1熱交換部31FUに適用される場合には、図4に示されているように傾けて取り付けられてもよい。また、図10のフィン31aは、下部第1熱交換部31FLに適用される場合には、図5に示されているように傾けて取り付けられてもよい。
(4-4) Modification D
FIG. 10 shows a water guide section 410 having a different shape from the water guide section 410 in FIG. 9 . The water guide section 410 in FIG. 10 is different from the water guide section 410 in FIG. 9 in that the first section 411 includes a broken line-shaped section 416. This broken line-shaped portion 416 is a portion in which short convex shapes are connected at intervals. The broken line-shaped portion 416 in FIG. 10 can be considered to be a series of short ribs like stepping stones, or a part of a long rib that is flush with the fin surface 31s. In addition, when the fin 31a of FIG. 10 is applied to the upper first heat exchange section 31FU, it may be attached at an angle as shown in FIG. 4. Furthermore, when the fins 31a in FIG. 10 are applied to the lower first heat exchange section 31FL, they may be attached at an angle as shown in FIG. 5.
 (4-5)変形例E
 上記実施形態では、導水部410がリブである場合について説明したが、導水部410は、リブ以外の凸部であってもよい。例えば、線状の部材をフィン表面31sに貼り付けてもよい。線状の部材を貼り付ける箇所は、例えば、図4のY字型の導水部410が形成されている箇所である。あるいは、導水部410は、フィン表面31sに親水化処理を施すことで形成してもよい。親水化処理には、例えば、活性化した光触媒をフィン表面31sに形成する方法がある。親水化処理を施す箇所は、例えば、図4のY字型の導水部410が形成されている箇所である。また、リブと親水化処理を組み合わせて導水部410を形成してもよい。
(4-5) Modification E
In the above embodiment, a case has been described in which the water guiding portion 410 is a rib, but the water guiding portion 410 may be a convex portion other than a rib. For example, a linear member may be attached to the fin surface 31s. The location where the linear member is attached is, for example, the location where the Y-shaped water guide portion 410 in FIG. 4 is formed. Alternatively, the water guide portion 410 may be formed by subjecting the fin surface 31s to a hydrophilic treatment. The hydrophilic treatment includes, for example, a method of forming an activated photocatalyst on the fin surface 31s. The location to which the hydrophilic treatment is applied is, for example, the location where the Y-shaped water guide portion 410 in FIG. 4 is formed. Furthermore, the water guiding portion 410 may be formed by combining ribs and hydrophilic treatment.
 (4-6)変形例F
 上記実施形態では、例えば図4の導水部410のように、真っ直ぐな直線形状が組み合わさってY字型になっている場合について説明した。しかし、導水部410は、例えば図11に示されている第1部分411及び第2部分412のように曲線形状であってもよい。図11の第1部分411及び第2部分412は、その接線が第1直線Ln1に対して傾斜するように延びている。
(4-6) Modification example F
In the above embodiment, a case has been described in which straight linear shapes are combined to form a Y-shape, for example, like the water guide section 410 in FIG. 4 . However, the water guide portion 410 may have a curved shape, such as the first portion 411 and the second portion 412 shown in FIG. 11, for example. The first portion 411 and the second portion 412 in FIG. 11 extend so that tangent lines thereof are inclined with respect to the first straight line Ln1.
 (4-7)変形例G
 上記実施形態では、導水部410のリブがフィン31aのフィン表面31sの側に突出している場合について説明した。しかし、導水部410のリブは、例えば図6に示されている場合とは反対側のフィン31aの裏側に突出するように形成されてもよい。
(4-7) Modification example G
In the above embodiment, a case has been described in which the ribs of the water guide portion 410 protrude toward the fin surface 31s of the fin 31a. However, the ribs of the water guide portion 410 may be formed so as to protrude from the back side of the fin 31a on the opposite side to that shown in FIG. 6, for example.
 (4-8)変形例H
 上記実施形態では、図3に示されているように、第1熱交換部31Fと第2熱交換部31Rの両方に導水部410が形成されている場合について説明した。しかし、導水部410は、第1熱交換部31Fと第2熱交換部31Rのいずれか一方のみに形成されてもよい。また、上記実施形態では、水部410が、第1熱交換部31Fに形成される場合に、上部第1熱交換部31FUと下部第1熱交換部31FLの両方に形成される場合について説明した。しかし、導水部410は、上部第1熱交換部31FUと下部第1熱交換部31FLのうちのいずれか一方のみに形成されてもよい。また、導水部410は、上部第1熱交換部31FUの一部、下部第1熱交換部31FLの一部または第2熱交換部31Rの一部に形成されてもよい。
(4-8) Modification H
In the above embodiment, as shown in FIG. 3, a case has been described in which the water guide section 410 is formed in both the first heat exchange section 31F and the second heat exchange section 31R. However, the water guide section 410 may be formed only in either the first heat exchange section 31F or the second heat exchange section 31R. Further, in the above embodiment, when the water section 410 is formed in the first heat exchange section 31F, the case is explained in which the water section 410 is formed in both the upper first heat exchange section 31FU and the lower first heat exchange section 31FL. . However, the water guide section 410 may be formed only in either the upper first heat exchange section 31FU or the lower first heat exchange section 31FL. Further, the water guide section 410 may be formed in a part of the upper first heat exchange part 31FU, a part of the lower first heat exchange part 31FL, or a part of the second heat exchange part 31R.
 (5)特徴
 (5-1)
 上述の熱交換器31では、導水部410が、第1フィンカラー111から離れて配置されて第2フィンカラー112に向けて延びている。導水部410は、第1フィンカラー111と切起部120の間の結露水が溜まる第1領域AR1に配置された第1始点を有している。導水部410は、切起部120から離れる方向に第1始点SP1より延びる第1部分411を有する。このような導水部410は、切起部120を結露水が塞がないように、第1領域AR1に溜まった結露水を切起部120から離しながら導水部410で導ける。その結果、熱交換器31では、フィン31aに沿って流れる気流に対する通風抵抗が結露水によって増加するのを抑制できる。
(5) Features (5-1)
In the heat exchanger 31 described above, the water guide portion 410 is disposed apart from the first fin collar 111 and extends toward the second fin collar 112. The water guide portion 410 has a first starting point located in a first region AR1 where dew condensation water accumulates between the first fin collar 111 and the cut and raised portion 120. The water guide portion 410 has a first portion 411 extending from the first starting point SP1 in a direction away from the cut and raised portion 120. Such a water guiding portion 410 can guide the condensed water accumulated in the first region AR1 away from the cut and raised portion 120 so that the condensed water does not block the cut and raised portion 120. As a result, in the heat exchanger 31, it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins 31a due to dew condensation.
 図4に示されている導水部410は、第1切起部121を結露水が塞がないように、第1領域AR1に溜まった結露水を第1切起部121から離しながら第1部分411で導けるので、フィン31aに沿って流れる気流に対する通風抵抗が結露水によって増加するのを抑制できる。 The water guide section 410 shown in FIG. 411, it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins 31a due to dew condensation.
 図5に示されている導水部410は、第2切起部122を結露水が塞がないように、第2領域AR2に溜まった結露水を第2切起部122から離しながら第2部分412で導けるので、フィン31aに沿って流れる気流に対する通風抵抗が結露水によって増加するのを抑制できる。 The water guide section 410 shown in FIG. 412, it is possible to suppress an increase in ventilation resistance to the airflow flowing along the fins 31a due to dew condensation.
 (5-2)
 導水部410が、フィン31aを凸状に変形させた構造、例えばリブを有する場合には、例えばプレス加工で、第1フィンカラー111及び第2フィンカラー112などを形成する工程で導水部410も形成でき、安価に導水部410を形成することができる。また、導水部410がリブである場合には、フィン31aの表面でも裏面でも、リブの周囲のフィン表面31sよりも結露水を導き易くなる。
(5-2)
When the water guiding portion 410 has a structure in which the fins 31a are deformed into a convex shape, for example, ribs, the water guiding portion 410 may also be formed in the process of forming the first fin collar 111, the second fin collar 112, etc. by, for example, press working. The water guide portion 410 can be formed at low cost. Furthermore, when the water guide portion 410 is a rib, it is easier to guide condensed water on both the front and back surfaces of the fin 31a than on the fin surface 31s around the rib.
 (5-3)
 導水部410は、第1直線Ln1に対して傾斜して延びている直線形状、または、接線が第1直線Ln1に対して傾斜するように延びている曲線形状を有する。第1直線Ln1に対して傾斜する直線形状または接線が傾斜するように延びる曲線形状とすることで、第1直線Ln1と略平行に延びる場合に比べて凸状の導水部410で生じる通風抵抗を低減できる。この点に関しては、実験を重ねることによって確認された効果である。
(5-3)
The water guide portion 410 has a linear shape that extends obliquely to the first straight line Ln1, or a curved shape that extends such that the tangent line is oblique to the first straight line Ln1. By adopting a linear shape that is inclined with respect to the first straight line Ln1 or a curved shape that extends so that the tangent line is inclined, the ventilation resistance that occurs in the convex water guiding portion 410 is reduced compared to the case where it extends substantially parallel to the first straight line Ln1. Can be reduced. This effect has been confirmed through repeated experiments.
 (5-4)
 図4、図5、図8乃至図11を用いて、導水部410が、第1フィンカラー111に近づくにつれて互いに間隔が広がる2本または二又に分かれた形状を有する場合について説明した。説明した2本または二又に分かれた形状は、導水部410の第1部分411と第2部分412である。このような2本または二又に分かれた形状によって2箇所から結露水を集めることができるので、速く多くの結露水を排水することができる。
(5-4)
With reference to FIGS. 4 , 5 , and 8 to 11 , a case has been described in which the water guide portion 410 has a shape that is divided into two or bifurcated parts, the distance of which increases as the distance approaches the first fin collar 111. The two or bifurcated shapes described above are the first portion 411 and the second portion 412 of the water guide portion 410 . With such a two-pronged or bifurcated shape, condensed water can be collected from two locations, so a large amount of condensed water can be quickly drained.
 (5-5)
 図8に示されている導水部410は、気流を切起部120の範囲外から切起部120の範囲内に向ける形状を有する。このような形状は、図8においては、第2部分412と第3部分413である。このようなフィン31aを持つ熱交換器31は、第2部分412と第3部分413によって切起部120に向けられた気流により、切起部120による熱伝達性能を向上させることができる。
(5-5)
The water guiding portion 410 shown in FIG. 8 has a shape that directs the airflow from outside the range of the cut and raised portion 120 to within the range of the cut and raised portion 120. Such shapes are the second portion 412 and the third portion 413 in FIG. The heat exchanger 31 having such fins 31a can improve the heat transfer performance of the cut and raised portions 120 due to the airflow directed toward the cut and raised portions 120 by the second portion 412 and the third portion 413.
 (5-6)
 図9及び図10に示した導水部410は、破線形状の部分415,416を有する。破線形状の部分415,416には途切れる部分があるので、フィン31aは、通風抵抗を低減することができる。
(5-6)
The water guiding section 410 shown in FIGS. 9 and 10 has portions 415 and 416 shaped like broken lines. Since the broken line-shaped portions 415 and 416 have discontinuous portions, the fins 31a can reduce ventilation resistance.
 (5-7)
 図5に示した導水部410は、第2フィンカラー112の上端の第6点Po6よりも切起部120から遠い位置で且つ第2フィンカラー112から離れた位置に終点EP1が配置されている。このような位置に終点EP1が配置されることで、導水部410によって第2フィンカラー112に導かれた結露水が再び切起部120の方に戻るのを抑制することができる。
(5-7)
In the water guide portion 410 shown in FIG. 5, the end point EP1 is located at a position farther from the cut-and-raised portion 120 than the sixth point Po6 at the upper end of the second fin collar 112 and further from the second fin collar 112. . By arranging the end point EP1 at such a position, it is possible to suppress the condensed water guided to the second fin collar 112 by the water guide portion 410 from returning to the cut and raised portion 120 again.
 以上、本開示の実施形態を説明したが、特許請求の範囲に記載された本開示の趣旨及び範囲から逸脱することなく、形態や詳細の多様な変更が可能なことが理解されるであろう。 Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as described in the claims. .
30  室内機
31  熱交換器
31a フィン
33  ケーシング
33a 吸込口
33b 吹出口
111 第1フィンカラー
112 第2フィンカラー
120 切起部
121 第1切起部
122 第2切起部
211 第1伝熱管
212 第2伝熱管
410 導水部
411 第1部分
412 第2部分
415,416 破線形状の部分
AR1 第1領域
AR2 第2領域
CL1 第1切断線
CL2 第2切断線
CL3 第3切断線
EP1 終点
LP1 下端点
LS1 第1線分
LS2 第2線分
LS3 第3線分
LS4 第4線分
MP1 中点
Po1 第1点
Po2 第2点
Po3 第3点
Po4 第4点
Po5 第5点
Po6 第6点
SP1 第1始点
SP2 第2始点
UP1 上端点
30 Indoor unit 31 Heat exchanger 31a Fin 33 Casing 33a Suction port 33b Air outlet 111 First fin collar 112 Second fin collar 120 Cut-out part 121 First cut-out part 122 Second cut-out part 211 First heat transfer tube 212 2 Heat exchanger tube 410 Water guide portion 411 First portion 412 Second portion 415, 416 Broken line shaped portion AR1 First area AR2 Second area CL1 First cutting line CL2 Second cutting line CL3 Third cutting line EP1 End point LP1 Lower end point LS1 1st line segment LS2 2nd line segment LS3 3rd line segment LS4 4th line segment MP1 Midpoint Po1 1st point Po2 2nd point Po3 3rd point Po4 4th point Po5 5th point Po6 6th point SP1 1st starting point SP2 Second starting point UP1 Upper end point
特開2013-221680号公報JP2013-221680A

Claims (12)

  1.  フィン(31a)と前記フィンを貫通し且つ熱媒体を流すための第1伝熱管(211)及び前記第1伝熱管の鉛直方向下方に隣り合う第2伝熱管(212)とを備える熱交換器(31)であって、
     前記フィンは、
     前記第1伝熱管に密着する第1フィンカラー(111)、及び前記第2伝熱管に密着する第2フィンカラー(112)と、
     前記第1伝熱管の貫通方向に切り起された切起部(120)と、
     前記フィン表面に設けられ、周囲の前記フィン表面よりも結露水を導き易い導水部(410)と、
    を備え、
     前記導水部は、前記第1フィンカラーから離れて配置されて前記第2フィンカラーに向かう方向に沿って延びており、前記第1フィンカラーと前記切起部の間の結露水が溜まる第1領域(AR1)に配置された第1始点(SP1)を有し、前記切起部から離れる方向に前記第1始点より延びる第1部分(411)を有する、熱交換器(31)。
    A heat exchanger comprising fins (31a), a first heat exchanger tube (211) passing through the fins and through which a heat medium flows, and a second heat exchanger tube (212) adjacent to the first heat exchanger tube vertically below. (31),
    The fin is
    a first fin collar (111) in close contact with the first heat exchanger tube; and a second fin collar (112) in close contact with the second heat exchanger tube;
    a cut-and-raised portion (120) cut and raised in the penetrating direction of the first heat exchanger tube;
    a water guiding portion (410) provided on the fin surface and more easily guiding dew condensation water than the surrounding fin surfaces;
    Equipped with
    The water guide part is arranged apart from the first fin collar and extends in a direction toward the second fin collar, and the water guide part is a first part where dew condensation water collects between the first fin collar and the cut-out part. A heat exchanger (31) having a first starting point (SP1) located in a region (AR1) and a first portion (411) extending from the first starting point in a direction away from the cut and raised part.
  2.  前記切起部は、前記第1フィンカラーと前記第2フィンカラーの間に配置されている第1切起部(121)であり、
     前記第1領域は、前記第1フィンカラーと、前記第1切起部と、第1線分(LS1)と、第2線分(LS2)とに囲まれている領域であり、
     前記第1切起部は、前記第2フィンカラーに最も近い前記第1フィンカラーの第1点(Po1)と前記第1フィンカラーに最も近い前記第2フィンカラーの第2点(Po2)とを通る第1直線に沿って延びていて前記第1直線に近い第1切断線(CL1)と前記第1直線から遠い第2切断線(CL2)とを有し、
     前記第1線分は、前記第1点と前記第1切断線の中点(MP1)とを結ぶ線分であり、
     前記第2線分は、前記第2切断線の上端点(UP1)と第3点(Po3)とを結ぶ線分であり、
     前記第3点は、前記第1直線から最も遠く且つ前記第1切起部に近い位置にある前記第1フィンカラーの中の点である、
    請求項1に記載の熱交換器(31)。
    The cut-and-raised portion is a first cut-and-raised portion (121) disposed between the first fin collar and the second fin collar,
    The first region is a region surrounded by the first fin collar, the first cut and raised portion, a first line segment (LS1), and a second line segment (LS2),
    The first cut-and-raised portion includes a first point (Po1) of the first fin collar closest to the second fin collar and a second point (Po2) of the second fin collar closest to the first fin collar. a first cutting line (CL1) extending along a first straight line passing through and close to the first straight line and a second cutting line (CL2) far from the first straight line,
    The first line segment is a line segment connecting the first point and the midpoint (MP1) of the first cutting line,
    The second line segment is a line segment connecting the upper end point (UP1) and the third point (Po3) of the second cutting line,
    The third point is a point in the first fin collar located farthest from the first straight line and closest to the first cut-out portion,
    Heat exchanger (31) according to claim 1.
  3.  前記フィンは、前記第1フィンカラーの中で前記第1直線から最も遠く且つ前記第1切起部から遠い位置にある第4点(Po4)と前記第3点とを通る第2直線と交差するように配置された第2切起部(122)を備え、
     前記導水部は、前記第1フィンカラーと、前記第2切起部と、第3線分(LS3)と、第4線分(LS4)とに囲まれている第2領域(AR2)に第2始点(SP2)を有し、前記第2切起部から離れる方向に前記第2始点より延びる第2部分(412)を有し、
     前記第2切起部は、前記第1直線に沿って延びていて前記第1直線に近い第3切断線(CL3)を有し、
     前記第3線分は、前記第1点と前記第3切断線の下端点(LP1)とを結ぶ線分であり、
     前記第4線分は、前記第3切断線の中で前記第4点に最も近い第5点(Po5)と前記第4点とを結ぶ線分である、
    請求項2に記載の熱交換器(31)。
    The fin intersects with a second straight line that passes through the third point and a fourth point (Po4) located farthest from the first straight line in the first fin collar and farthest from the first cut-out part. a second cut-and-raised portion (122) arranged so as to
    The water guiding portion includes a second region (AR2) surrounded by the first fin collar, the second cut-and-raised portion, a third line segment (LS3), and a fourth line segment (LS4). has a second starting point (SP2), and has a second portion (412) extending from the second starting point in a direction away from the second cut and raised part,
    The second cut-and-raised portion has a third cutting line (CL3) that extends along the first straight line and is close to the first straight line,
    The third line segment is a line segment connecting the first point and the lower end point (LP1) of the third cutting line,
    The fourth line segment is a line segment that connects the fourth point and a fifth point (Po5) closest to the fourth point among the third cutting lines,
    A heat exchanger (31) according to claim 2.
  4.  前記導水部は、前記フィンを凸状に変形させた構造を有する、
    請求項2または請求項3に記載の熱交換器(31)。
    The water guide part has a structure in which the fin is deformed into a convex shape,
    A heat exchanger (31) according to claim 2 or 3.
  5.  前記凸状に変形させた部分がリブである、
    請求項4に記載の熱交換器(31)。
    The convexly deformed portion is a rib;
    A heat exchanger (31) according to claim 4.
  6.  前記導水部は、前記第1直線に対して傾斜して延びている直線形状、または、接線が前記第1直線に対して傾斜するように延びている曲線形状を有する、
    請求項4または請求項5に記載の熱交換器(31)。
    The water guide portion has a linear shape extending obliquely with respect to the first straight line, or a curved shape extending such that a tangent line is oblique with respect to the first straight line.
    A heat exchanger (31) according to claim 4 or claim 5.
  7.  前記導水部は、前記第1フィンカラーに近づくにつれて互いに間隔が広がる2本または二又に分かれた形状を有する、
    請求項4から6のいずれか一項に記載の熱交換器(31)。
    The water guide part has a two-branched shape or a bifurcated shape in which the distance from each other becomes wider as it approaches the first fin collar.
    Heat exchanger (31) according to any one of claims 4 to 6.
  8.  前記導水部は、気流を前記切起部の範囲外から前記切起部の範囲内に向ける形状を有する、
    請求項4から7のいずれか一項に記載の熱交換器(31)。
    The water guide part has a shape that directs airflow from outside the range of the cut and raised part to inside the range of the cut and raised part,
    Heat exchanger (31) according to any one of claims 4 to 7.
  9.  前記導水部は、破線形状の部分(415,416)を有する、
    請求項4から7のいずれか一項に記載の熱交換器(31)。
    The water guide portion has broken line-shaped portions (415, 416),
    Heat exchanger (31) according to any one of claims 4 to 7.
  10.  前記第1フィンカラーと前記切起部との間の距離は、0よりも大きく5mm以下である、
    請求項1から9のいずれか一項に記載の熱交換器(31)。
    The distance between the first fin collar and the cut-out portion is greater than 0 and less than or equal to 5 mm,
    Heat exchanger (31) according to any one of claims 1 to 9.
  11.  前記導水部は、前記第2フィンカラーの上端の第6点(Po6)よりも前記切起部から遠い位置で且つ前記第2フィンカラーから離れた位置に終点(EP1)が配置されている、
    請求項1から10のいずれか一項に記載の熱交換器(31)。
    The water guide part has an end point (EP1) located at a position farther from the cut and raised part than a sixth point (Po6) at the upper end of the second fin collar and at a position farther from the second fin collar.
    Heat exchanger (31) according to any one of claims 1 to 10.
  12.  請求項1から11のいずれかに記載の熱交換器(31)と、
     前記熱交換器を収納し、前記熱交換器での熱交換のための空気を取り入れる吸込口(33a)と、前記熱交換器での熱交換後の空気を室内に供給する吹出口(33b)とを有するケーシング(33)と、
    を備え、
     前記熱交換器において、前記第1伝熱管及び前記第2伝熱管を流れる前記熱媒体と前記フィンを通過する空気との熱交換を行う、室内機(30)。
    A heat exchanger (31) according to any one of claims 1 to 11,
    An inlet (33a) that houses the heat exchanger and takes in air for heat exchange in the heat exchanger, and an outlet (33b) that supplies air after heat exchange in the heat exchanger into the room. a casing (33) having;
    Equipped with
    In the heat exchanger, an indoor unit (30) that performs heat exchange between the heat medium flowing through the first heat exchanger tube and the second heat exchanger tube and the air passing through the fins.
PCT/JP2023/012276 2022-03-31 2023-03-27 Heat exchanger and indoor unit WO2023190378A1 (en)

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JP2022058679A JP7401802B2 (en) 2022-03-31 2022-03-31 Heat exchanger and indoor unit

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WO2023190378A1 true WO2023190378A1 (en) 2023-10-05

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143948A (en) * 1975-06-06 1976-12-10 Hitachi Ltd Heat exchanger
JPH02115679U (en) * 1989-02-28 1990-09-17
WO2012102053A1 (en) * 2011-01-27 2012-08-02 パナソニック株式会社 Finned-tube heat exchanger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143948A (en) * 1975-06-06 1976-12-10 Hitachi Ltd Heat exchanger
JPH02115679U (en) * 1989-02-28 1990-09-17
WO2012102053A1 (en) * 2011-01-27 2012-08-02 パナソニック株式会社 Finned-tube heat exchanger

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JP7401802B2 (en) 2023-12-20

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