WO2023105566A1 - 熱交換器 - Google Patents
熱交換器 Download PDFInfo
- Publication number
- WO2023105566A1 WO2023105566A1 PCT/JP2021/044701 JP2021044701W WO2023105566A1 WO 2023105566 A1 WO2023105566 A1 WO 2023105566A1 JP 2021044701 W JP2021044701 W JP 2021044701W WO 2023105566 A1 WO2023105566 A1 WO 2023105566A1
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- WO
- WIPO (PCT)
- Prior art keywords
- heat transfer
- portions
- promoting
- heat
- fins
- Prior art date
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- 230000001737 promoting effect Effects 0.000 claims abstract description 166
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 18
- 230000002708 enhancing effect Effects 0.000 claims description 56
- 239000003507 refrigerant Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 22
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000470 constituent Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/16—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/20—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being attachable to the element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/08—Fins with openings, e.g. louvers
Definitions
- the present disclosure relates to a heat exchanger having fins provided on heat transfer tubes.
- a heat exchanger in which a heat transfer plate, which constitutes the fins provided on the heat transfer tube, is provided with a cut portion, a cut-and-raised portion, or a heat transfer promotion portion, which is a louver.
- a heat transfer plate is provided on the windward side and the leeward side of the heat transfer tube, respectively, and the heat transfer promoting portion is provided on the heat transfer plate on the windward side of the heat exchange member (see, for example, Patent Document 1).
- the present disclosure has been made in view of the above circumstances, and aims to provide a heat exchanger having fins capable of improving the heat transfer coefficient between gas and the fins.
- a heat exchanger includes heat transfer tubes extending in a second direction that intersects the first direction in which gas flows, and surfaces along the first direction and the second direction. a first extending portion having a first heat transfer enhancing region for improving heat transfer coefficient, the fin being provided on the upstream side of the gas from the heat transfer tube in the first direction; and a second extending portion provided downstream of the heat transfer tube in the first direction and having a second heat transfer enhancing region for improving heat transfer coefficient.
- the first extension portion of the fin provided on the upstream side of the gas is provided with the first heat transfer enhancing region, and the first extension portion of the fin provided on the downstream side of the gas from the first extension portion is provided.
- the second extension portion is provided with a second heat transfer enhancement region. Therefore, it is possible to provide a heat exchanger capable of improving the heat transfer coefficient between the fins and the gas passing through the fins by the first heat transfer enhancing region and the second heat transfer enhancing region.
- FIG. 1 is a schematic configuration diagram showing a refrigeration cycle apparatus according to Embodiment 1;
- FIG. FIG. 2 is a perspective view showing the outdoor heat exchanger of FIG. 1;
- 4 is a diagram showing a heat transfer member of the heat exchanger according to Embodiment 1;
- FIG. FIG. 5 is a diagram showing a modification of how to attach the fins to the heat transfer tubes of the heat exchanger according to Embodiment 1;
- FIG. 10 is a diagram showing a heat transfer member of a heat exchanger according to Embodiment 2;
- FIG. 10 is a diagram showing a heat transfer member of a heat exchanger according to Embodiment 3;
- FIG. 10 is a diagram showing a heat transfer member of a heat exchanger according to Embodiment 4;
- FIG. 10 is a diagram showing a modification of the heat transfer member of the heat exchanger according to Embodiment 4;
- FIG. 10 is a diagram showing a heat exchange member of a heat exchanger according to Embodiment 5;
- FIG. 13 is a diagram showing a modification of the heat exchange member of the heat exchanger according to Embodiment 5;
- FIG. 10 is a view showing the arrangement of first heat transfer promoting portions and second heat transfer promoting portions formed in a fin of a comparative example;
- FIG. 5 is a diagram showing the relationship between slit area ratio and air-side heat transfer performance;
- FIG. 1 is a schematic configuration diagram showing a refrigeration cycle apparatus according to Embodiment 1.
- a refrigeration cycle device is used as the air conditioner 1 .
- the air conditioner 1 has a compressor 2 , an outdoor heat exchanger 3 , an expansion valve 4 , an indoor heat exchanger 5 and a four-way valve 6 .
- a compressor 2, an outdoor heat exchanger 3, an expansion valve 4 and a four-way valve 6 are provided in the outdoor unit, and an indoor heat exchanger 5 is provided in the indoor unit.
- the compressor 2, the outdoor heat exchanger 3, the expansion valve 4, the indoor heat exchanger 5, and the four-way valve 6 are connected to each other via refrigerant pipes to form a refrigerant circuit in which the refrigerant can circulate.
- the operation of the compressor 2 performs a refrigeration cycle in which the refrigerant circulates through the compressor 2, the outdoor heat exchanger 3, the expansion valve 4, and the indoor heat exchanger 5 while undergoing phase changes.
- the outdoor unit is provided with an outdoor fan 7 that forces the outdoor air to pass through the outdoor heat exchanger 3.
- the outdoor heat exchanger 3 exchanges heat between the outdoor air stream generated by the operation of the outdoor fan 7 and the refrigerant.
- the indoor unit is provided with an indoor fan 8 for forcing indoor air to pass through the indoor heat exchanger 5 .
- the indoor heat exchanger 5 exchanges heat between the indoor air flow generated by the operation of the indoor fan 8 and the refrigerant.
- the operation of the air conditioner 1 can be switched between cooling operation and heating operation.
- the four-way valve 6 is an electromagnetic valve that switches refrigerant flow paths according to switching between the cooling operation and the heating operation of the air conditioner 1 .
- the four-way valve 6 guides the refrigerant from the compressor 2 to the outdoor heat exchanger 3 and the refrigerant from the indoor heat exchanger 5 to the compressor 2 during cooling operation, and guides the refrigerant from the compressor 2 during heating operation.
- the refrigerant from the outdoor heat exchanger 3 is guided to the compressor 2 while being guided to the indoor heat exchanger 5 .
- the direction of refrigerant flow during cooling operation is indicated by dashed arrows
- the direction of refrigerant flow during heating operation is indicated by solid arrows.
- the refrigerant compressed by the compressor 2 is sent to the outdoor heat exchanger 3 during cooling operation of the air conditioner 1 .
- the refrigerant releases heat to the outdoor air and is condensed.
- the refrigerant is sent to the expansion valve 4 , decompressed by the expansion valve 4 , and then sent to the indoor heat exchanger 5 .
- the refrigerant takes heat from indoor air in the indoor heat exchanger 5 and evaporates, and then returns to the compressor 2 . Therefore, during cooling operation of the air conditioner 1, the outdoor heat exchanger 3 functions as a condenser, and the indoor heat exchanger 5 functions as an evaporator.
- the refrigerant compressed by the compressor 2 is sent to the indoor heat exchanger 5.
- the indoor heat exchanger 5 the refrigerant releases heat to indoor air and is condensed.
- the refrigerant is sent to the expansion valve 4 , decompressed by the expansion valve 4 , and then sent to the outdoor heat exchanger 3 .
- the refrigerant takes heat from the outdoor air in the outdoor heat exchanger 3 and evaporates, and then returns to the compressor 2 . Therefore, during heating operation of the air conditioner 1, the outdoor heat exchanger 3 functions as an evaporator, and the indoor heat exchanger 5 functions as a condenser.
- FIG. 2 is a perspective view showing the outdoor heat exchanger 3 of FIG.
- the outdoor heat exchanger 3 has a heat exchanger 11 through which the airflow A generated by the operation of the outdoor fan 7 passes.
- the heat exchanger 11 has a first header tank 12, a second header tank 13, and a plurality of heat exchange members 14 connecting the first header tank 12 and the second header tank 13. .
- one of the refrigerant pipe from the expansion valve 4 and the refrigerant pipe from the four-way valve 6 is connected to the first header tank 12 and the other is connected to the second header tank 13 .
- the first header tank 12 and the second header tank 13 are arranged horizontally. Also, the second header tank 13 is arranged above the first header tank 12 . The first header tank 12 and the second header tank 13 are arranged parallel to each other along the z direction in FIG. 2, which is the third direction.
- the outer shape of the first header tank 12 and the second header tank 13 is a rectangular parallelepiped, but the shape is not limited.
- the outer shape of the first header tank 12 and the second header tank 13 may be, for example, a cylinder or an elliptical cylinder, and the cross-sectional shape can be changed as appropriate.
- the structure of the first header tank 12 and the second header tank 13 for example, it is possible to employ a cylinder whose both ends are closed or a stack of plate-like bodies having slits 21 formed therein. can.
- the first header tank 12 and the second header tank 13 are formed with coolant flow ports through which the coolant can flow in and out.
- the plurality of heat exchange members 14 are spaced apart from each other in the longitudinal direction of each of the first header tank 12 and the second header tank 13, that is, the z direction in FIG. Also, the plurality of heat exchange members 14 are arranged parallel to each other.
- the longitudinal direction of the plurality of heat exchange members 14 is the y-direction, which is the second direction crossing the z-direction in FIG.
- the y direction is the vertical direction in this embodiment.
- the longitudinal direction of each heat exchange member 14 is perpendicular to the longitudinal direction of each of the first header tank 12 and the second header tank 13 . Also, in this example, placement of members in spaces between the plurality of heat exchange members 14 is prohibited. Thereby, in this example, connection of the members to the mutually facing surfaces of the heat exchange members 14 adjacent to each other is avoided.
- the airflow A generated by the operation of the outdoor fan 7 passes through the multiple heat exchange members 14 .
- the airflow is along the direction intersecting with the respective longitudinal directions of the first header tank 12, the second header tank 13, and the heat exchange members 14, that is, along the x direction, which is the first direction in FIG. A passes between the plurality of heat exchange members 14 .
- the x-direction is orthogonal to the y-direction, which is the longitudinal direction of the heat exchange member 14 .
- FIG. 3 is a diagram showing the heat exchange member 14 of the heat exchanger 11 according to Embodiment 1.
- FIG. FIG. 3 is a view of the heat exchange member 14 shown in FIG. 2 as viewed in the z direction.
- white arrows indicate the direction of gas flow.
- FIG. 3 shows one heat exchange member 14 as an example among the plurality of heat exchange members 14 shown in FIG.
- the heat exchange member 14 has heat transfer tubes 15 and fins 16 .
- the heat transfer tubes 15 are arranged at predetermined intervals in the z direction.
- the heat transfer tubes 15 are circular tubes or flat tubes.
- the heat transfer pipe 15 extends in the y direction and connects the first header tank 12 and the second header tank 13.
- the heat transfer tubes 15 extend in the y direction, that is, in the vertical direction, and the refrigerant that has flowed into the heat transfer tubes 15 from the first header tank 12 or the second header tank 13 flows in the heat transfer tubes 15 in the vertical direction.
- the fins 16 have surfaces along the x-direction and the y-direction.
- the fins 16 are provided on the heat transfer tubes 15 so that their longitudinal directions are along the y direction.
- the fin 16 has a first extension 16_1 and a second extension 16_2.
- the first extending portion 16_1 and the second extending portion 16_2 are located outside the heat transfer tubes 15 in the x direction.
- the first extension portion 16_1 and the second extension portion 16_2 have the same size, and are provided on the heat transfer tube 15 so that the longitudinal direction thereof extends along the y direction.
- a first extension portion 16_1 and a second extension portion 16_2, which are individually configured, are attached to the sides of the heat transfer tubes 15 along the y direction.
- the first extending portion 16_1 has a rectangular shape when viewed from the z direction, and one of its long sides is provided on the heat transfer tube 15 .
- the short side of the first extending portion 16_1 is arranged to extend windward along the x direction.
- the first extending portion 16_1 has a first heat transfer enhancing region 17_1 provided upstream of the gas passing through the fins 16 and improving the heat transfer coefficient between the gas and the first extending portion 16_1.
- the first heat transfer enhancing region 17_1 is provided on the upstream side of the gas passing through the fins 16, and has a plurality of first heat transfer enhancing portions 17_1_1 that improve the heat transfer coefficient between the gas and the first extension portion 16_1. .
- the plurality of first heat transfer promoting portions 17_1_1 are arranged along the y direction.
- the first heat transfer promoting region 17_1 is positioned between the first heat transfer promoting portion 17_1_1 arranged on the upper side and the first heat transfer promoting portion 17_1_1 arranged on the lower side with respect to the y direction. It has a flat portion 17_1_2.
- a plurality of first flat portions 17_1_2 are provided in the first heat transfer promoting region 17_1.
- the first heat transfer promoting portions 17_1_1 and the first flat portions 17_1_2 are alternately arranged along the y direction.
- Three slits 21 are arranged in parallel along the x direction in the first heat transfer promoting portion 17_1_1.
- the slit 21 is an opening penetrating the fin 16 .
- a cut-and-raised portion instead of the slits 21 of the first heat transfer promoting portion 17_1_1, a cut-and-raised portion, a louver, or an uneven portion may be provided.
- the cut-and-raised portion is formed by raising the portion between two parallel slit-like cuts formed on the surface of the fin 16 in the z-direction.
- an opening having the same shape as the cut-and-raised is formed.
- the cut-and-raise protrudes from the plane of the fin 16 in the z-direction.
- a louver is formed by slanting a portion between two slits formed on the surface of the fins 16 with respect to the surface of the fins 16 .
- the fins 16 are formed with openings having the same shape as the louvers.
- the uneven portion is formed by protruding or recessing the surface of the fin 16 in the z direction.
- the first heat transfer promoting portion 17_1_1 may be a cut-and-raised portion, a louver, or an uneven portion.
- the first flat portion 17_1_2 is a flat rectangular region of the fin 16 between the first heat transfer promoting portions 17_1_1.
- the length in the y direction of the first flat portion 17_1_2 is shorter than the length in the y direction of the first heat transfer promoting portion 17_1_1.
- the second extending portion 16_2 has a rectangular shape when viewed in the z direction, and one of its long sides is provided on the heat transfer tube 15 .
- the short side of the second extending portion 16_2 is arranged to extend to the leeward side along the x direction.
- the second extension 16_2 has a second heat transfer enhancing region 17_2 that is provided on the downstream side of the gas passing through the fins 16 and that improves the heat transfer coefficient between the gas and the second extension 16_2.
- the second heat transfer enhancing region 17_2 is provided on the downstream side of the gas passing through the fins 16, and has a plurality of second heat transfer enhancing portions 17_2_1 that improve the heat transfer coefficient between the gas and the second extending portion 16_2. .
- the plurality of second heat transfer promoting portions 17_2_1 are arranged along the y direction.
- the second heat transfer promoting region 17_2 is a second flat portion positioned between the second heat transfer promoting portion 17_2_1 arranged on the upper side in the y direction and the second heat transfer promoting portion 17_2_1 arranged on the lower side. 17_2_2.
- a plurality of second flat portions 17_2_2 are provided in the second heat transfer promoting region 17_2.
- the second heat transfer promoting portions 17_2_1 and the second flat portions 17_2_2 are alternately arranged along the y direction.
- Three slits 21 are arranged in parallel along the x direction in the second heat transfer promoting portion 17_2_1.
- the slit 21 is an opening penetrating the fin 16 .
- a cut-and-raised portion instead of the slits 21 of the second heat transfer promoting portion 17_2_1, a cut-and-raised portion, a louver, or an uneven portion may be provided.
- the cut-and-raised portion is formed by raising the portion between two parallel slit-like cuts formed on the surface of the fin 16 in the z-direction.
- an opening having the same shape as the cut-and-raised is formed.
- the cut-and-raise protrudes from the plane of the fin 16 in the z-direction.
- a louver is formed by slanting a portion between two slits formed on the surface of the fins 16 with respect to the surface of the fins 16 .
- the fins 16 are formed with openings having the same shape as the louvers.
- the uneven portion is formed by protruding or recessing the surface of the fin 16 in the z direction.
- the second heat transfer promoting portion 17_2_1 may be a cut-and-raised portion, a louver, or an uneven portion.
- the second flat portion 17_2_2 is a flat rectangular region of the fin 16 between the second heat transfer promoting portions 17_2_1.
- the length in the y direction of the second flat portion 17_2_2 is shorter than the length in the y direction of the second heat transfer promoting portion 17_2_1.
- a second flat portion 17_2_2 is arranged in the second heat transfer enhancing region 17_2 downstream of the first heat transfer enhancing portion 17_1_1, and a second heat transfer enhancing region 17_2 is located downstream of the first flat portion 17_1_2.
- a second heat transfer promoting portion 17_2_1 is arranged in the heat promoting region 17_2. That is, the heat exchange member 14 has a region in which the first heat transfer promoting portion 17_1_1 and the second flat portion 17_2_2 are aligned and a region in which the first flat portion 17_1_2 and the second heat transfer promoting portion 17_2_1 are aligned in the x direction.
- the first heat transfer promoting portion 17_1_1 and the second heat transfer promoting portion 17_2_1 are arranged side by side in the x direction.
- the inflowing airflow flows in the x-direction on the surfaces of the first heat transfer enhancing regions 17_1 of the fins 16 .
- the first heat transfer enhancing region 17_1 part of the airflow is heat transfer enhanced in the slits 21 formed in the first heat transfer enhancing portion 17_1_1.
- the airflow flowing into the first flat portion 17_1_2 and the other airflow avoiding the first heat transfer promoting portion 17_1_1 flow in the x direction on the surface of the first flat portion 17_1_2.
- the airflow passes through the surface of the heat transfer tube 15, exchanges heat with the refrigerant flowing through the heat transfer tube 15, and then flows in the x direction on the surface of the second heat transfer enhancing region 17_2.
- part of the airflow is heat transfer promoted in the slits 21 formed in the second heat transfer promoting portion 17_2_1.
- the airflow flowing into the second flat portion 17_2_2 and the other airflow avoiding the second heat transfer promoting portion 17_2_1 flow in the x direction on the surface of the second flat portion 17_2_2.
- FIG. 4 is a diagram showing a modification of how the fins 16 of the heat exchanger 11 according to Embodiment 1 are attached to the heat transfer tubes 15.
- FIG. 4 is a diagram of the heat transfer tubes 15 and the fins 16 viewed in the y direction.
- the extending portion 16_2 may be integrally formed. The same applies to the other second, third, fourth and fifth embodiments.
- the fin 16 has a first extension portion 16_1, a second extension portion 16_2, and a main body portion 16_3.
- a first extension portion 16_1 and a second extension portion 16_2 are integrally formed with a main body portion 16_3.
- the body portion 16_3 is bent so as to come into contact with the heat transfer tube 15 , and the bent body portion 16_3 is attached to the heat transfer tube 15 .
- the heat exchange member 14 of the present embodiment can also be constructed by such an attachment mode.
- the positions of the first extending portion 16_1 and the second extending portion 16_2 with respect to the heat transfer tube 15 in the z-direction can be configured as follows.
- the first extension portion 16_1 and the second extension portion 16_2 are arranged so as to be aligned with the center of the heat transfer tube 15 in the z direction. This arrangement is also applied to a mode in which the first extension portion 16_1 and the second extension portion 16_2 are attached to the heat transfer tubes 15 individually.
- first extension portion 16_1 and the second extension portion 16_2 do not have to be aligned strictly with the center of the heat transfer tube 15 in the z direction, and the first extension portion 16_1 and the second extension portion 16_2 are within the range of the heat transfer tube 15 in the z direction.
- the existing portion 16_1 and the second extending portion 16_2 may be arranged.
- the first extension portion 16_1 and the second extension portion 16_2 may be arranged so as to be flush with the end surface of the heat transfer tube 15 in the z direction.
- the heat exchanger 11 has the heat transfer tubes 15 extending in the second direction intersecting the first direction in which the gas flows, and the surfaces along the first and second directions. , and fins 16 provided on the heat transfer tubes 15 .
- the fin 16 has a first extending portion 16_1 having a first heat transfer enhancing region 17_1 that is provided on the upstream side of the gas from the heat transfer tube 15 in the first direction and that improves the heat transfer coefficient with the gas.
- the fin 16 includes a second extending portion 16_2 having a second heat transfer promoting region 17_2 that is provided on the downstream side of the gas from the heat transfer tube 15 in the first direction and that improves the heat transfer coefficient with the gas.
- the heat exchanger 11 of Embodiment 1 is provided with the first heat transfer enhancing region 17_1 on the upstream side of the heat transfer tube 15 and the second heat transfer enhancing region 17_2 on the downstream side thereof, the fins 16 and The heat transfer coefficient with gas passing through the fins 16 can be improved.
- the gas when the gas is sent toward the heat transfer tube 15, the gas flows around the surface of the heat transfer tube 15 along the x direction so as to bypass the heat transfer tube 15, and the gas flows upstream of the heat transfer tube 15 in the gas flow direction. It is difficult for gas to flow to the ends and downstream ends (the left and right ends of the heat transfer tube 15 illustrated in FIG. 4 ).
- the first extending portion 16_1 and the second extending portion 16_2 extending in the x-direction in which the gas flows are provided on the upstream side and the downstream side of the heat transfer tube 15, respectively.
- the first extension portion 16_1 is provided with a first heat transfer enhancing region 17_1 that improves the heat transfer coefficient with the gas
- the second extension portion 16_2 is provided with a second heat transfer enhancement region that improves the heat transfer coefficient with the gas.
- a thermal enhancement region 17_2 is provided. Therefore, the heat transfer coefficient between the gas flowing in the x direction and the fins 16 can be improved.
- a second flat portion 17_2_2 is arranged in the second heat transfer promoting region 17_2 aligned with the first heat transfer promoting portion 17_1_1 in the x direction, and the second heat transfer promoting portion 17_2_2 is arranged in the x direction of the first flat portion 17_1_2 in the x direction.
- a second heat transfer promoting portion 17_2_1 is arranged in the promoting region 17_2. Therefore, even if the gas flowing in the x direction flows through the first flat portion 17_1_2 on the upstream side, it easily flows through the second heat transfer promoting portion 17_2_1 on the downstream side.
- the gas flowing through the first flat portion 17_1_2 on the downstream side flows around the first heat transfer promoting portion 17_1_1 on the upstream side. Therefore, the heat transfer coefficient of the fins 16 can be improved.
- the path of the airflow passing through the first flat portion 17_1_2 or the second flat portion 17_2_2 can be lengthened, so that the substantial heat transfer area of the fin 16 can be increased. can do.
- the first heat transfer promoting portions 17_1_1 and the first flat portions 17_1_2 are alternately arranged along the y direction, which is the second direction.
- the second heat transfer promoting portions 17_2_1 and the second flat portions 17_2_2 are alternately arranged along the y direction, which is the second direction. Therefore, when looking at the pressure loss distribution of the entire fin 16, the pressure loss distribution of the airflow in the y direction approaches uniformity. Therefore, the airflow passing through the first flat portion 17_1_2 and the second flat portion 17_2_2 is reduced, and as a result, the heat transfer coefficient between the airflow and the fins 16 is improved.
- the heat exchange member 14 of the heat exchanger 11 according to the second embodiment has a size of the first flat portion 17_1_2 and the first flat portion 17_1_2 compared to the heat exchange member 14 of the heat exchanger 11 according to the first embodiment. is different.
- FIG. 5 is a diagram showing the heat exchange member 14 of the heat exchanger 11 according to the second embodiment.
- white arrows indicate the direction of gas flow.
- FIG. 5 shows one heat exchange member 14 as an example among the plurality of heat exchange members 14 shown in FIG.
- the lengths of the first heat transfer promoting portion 17_1_1, the first flat portion 17_1_2, the second heat transfer promoting portion 17_2_1, and the second flat portion 17_2_2 in the x direction and the y direction are the same. Note that only the y-direction lengths of the first heat transfer promoting portion 17_1_1, the first flat portion 17_1_2, the second heat transfer promoting portion 17_2_1, and the second flat portion 17_2_2 may be the same.
- the position in the y direction of the first heat transfer enhancing portion 17_1_1 is the same as the position in the y direction of the second flat portion 17_2_2 in the second heat transfer enhancing region 17_2.
- the position in the y direction of the first flat portion 17_1_2 is the same as the position in the y direction of the second heat transfer promoting portion 17_2_1 in the second heat transfer promoting region 17_2.
- the positions of the first heat transfer promoting portion 17_1_1 and the second heat transfer promoting portion 17_2_1 formed in the fins 16 of the heat exchanger 11 according to the second embodiment are shifted in the y direction.
- the first flat portion 17_1_2 and the second flat portion 17_2_2 are displaced from each other in the y direction.
- the heat exchanger 11 has the heat transfer tubes 15 extending in the second direction intersecting the first direction in which the gas flows, the surfaces along the first direction and the second direction, and fins 16 provided on the heat transfer tubes 15 .
- the fin 16 has a first extending portion 16_1 having a first heat transfer enhancing region 17_1 that is provided on the upstream side of the gas from the heat transfer tube 15 in the first direction and that improves the heat transfer coefficient with the gas.
- the fin 16 includes a second extending portion 16_2 having a second heat transfer promoting region 17_2 that is provided on the downstream side of the gas from the heat transfer tube 15 in the first direction and that improves the heat transfer coefficient with the gas.
- the heat exchanger 11 of Embodiment 1 is provided with the first heat transfer enhancing region 17_1 on the upstream side of the heat transfer tube 15 and the second heat transfer enhancing region 17_2 on the downstream side thereof, the fins 16 and The heat transfer coefficient with gas passing through the fins 16 can be improved.
- the gas when the gas is sent toward the heat transfer tube 15, the gas flows around the surface of the heat transfer tube 15 along the x direction so as to bypass the heat transfer tube 15, and the gas flows upstream of the heat transfer tube 15 in the gas flow direction. It is difficult for gas to flow to the ends and downstream ends (the left and right ends of the heat transfer tube 15 illustrated in FIG. 4 ).
- the first extending portion 16_1 and the second extending portion 16_2 extending in the x-direction in which the gas flows are provided on the upstream side and the downstream side of the heat transfer tube 15, respectively.
- the first extension portion 16_1 is provided with a first heat transfer enhancing region 17_1 that improves the heat transfer coefficient with the gas
- the second extension portion 16_2 is provided with a second heat transfer enhancement region that improves the heat transfer coefficient with the gas.
- a thermal enhancement region 17_2 is provided. Therefore, the heat transfer coefficient between the gas flowing in the x direction and the fins 16 can be improved.
- the lengths in the x direction and the y direction of the first heat transfer promoting portion 17_1_1, the first flat portion 17_1_2, the second heat transfer promoting portion 17_2_1, and the second flat portion 17_2_2 are the same. Therefore, when manufacturing the fin 16, the first heat transfer promoting portion 17_1_1 and the second heat transfer promoting portion 17_2_1 can be formed in the fin 16 by progressive pressing.
- the heat exchange member 14 of the heat exchanger 11 according to Embodiment 3 has the first flat portion 17_1_2 and the second flat portion 17_2_2 provided in the heat exchange member 14 of the heat exchanger 11 according to Embodiment 1. It does not.
- FIG. 6 is a diagram showing the heat exchange member 14 of the heat exchanger 11 according to the third embodiment.
- white arrows indicate the direction of gas flow.
- FIG. 6 shows one heat exchange member 14 as an example among the plurality of heat exchange members 14 shown in FIG.
- the first heat transfer enhancing region 17_1 includes a plurality of first heat transfer enhancing portions 17_1_1 that are arranged along the y direction and improve the heat transfer coefficient with gas.
- the second heat transfer enhancing region 17_2 has a plurality of second heat transfer enhancing portions 17_2_1 that are arranged along the y direction and improve the heat transfer coefficient with gas.
- the first heat transfer promoting portion 17_1_1 has one slit 21.
- the slits 21 provided in the first heat transfer promoting portions 17_1_1 adjacent to each other in the y-direction have different positions in the x-direction.
- a plurality of slits 21 formed in the first heat transfer promoting portion 17_1_1 may be formed along the x direction.
- the second heat transfer promoting portion 17_2_1 has one slit 21.
- the slits 21 provided in the second heat transfer promoting portions 17_2_1 adjacent in the y direction have different positions in the x direction.
- a plurality of slits 21 formed in the second heat transfer promoting portion 17_2_1 may be formed along the x direction.
- the sum of the number of slits 21 formed in the first heat transfer promoting portion 17_1_1 in the x direction and the number of slits 21 formed in the second heat transfer promoting portion 17_2_1 in the x direction is constant. .
- a plurality of first heat transfer promoting portions 17_1_1 and second heat transfer promoting portions 17_2_1 are provided along the y direction of the fins 16 .
- the sum of the number of slits 21 formed in the first heat transfer promoting portion 17_1_1 in the x direction and the number of slits 21 formed in the second heat transfer promoting portion 17_2_1 in the x direction is constant. That is, a plurality of sets of slits 21 provided in the same number (two in the example of FIG. 6) in the x direction are arranged in the y direction. Therefore, the pressure loss distribution in the y direction of the airflow can be made uniform. Thereby, the heat transfer coefficient of the fins 16 of the heat exchanger 11 is improved.
- the heat exchange member 14 of the heat exchanger 11 according to Embodiment 4 has a first pattern of arrangement of the slits 21 formed in the first heat transfer promoting portion 17_1_1 and slits formed in the second heat transfer promoting portion 17_2_1. 21 is displaced in the x direction from the second pattern of arrangement.
- FIG. 7 is a diagram showing the heat exchange member 14 of the heat exchanger 11 according to the fourth embodiment.
- white arrows indicate the direction of gas flow.
- FIG. 7 shows one heat exchange member 14 as an example among the plurality of heat exchange members 14 shown in FIG.
- the first heat transfer enhancing region 17_1 includes a plurality of first heat transfer enhancing portions 17_1_1 that are arranged along the y direction and improve the heat transfer coefficient with gas.
- the second heat transfer enhancing region 17_2 has a plurality of second heat transfer enhancing portions 17_2_1 that are arranged along the y direction and improve the heat transfer coefficient with gas.
- a first pattern of slits 21 is formed in the plurality of first heat transfer promoting portions 17_1_1.
- two slits 21 arranged in the x direction in the first heat transfer promoting portion 17_1_1 and one slit 21 provided adjacent to the two slits 21 in the y direction are continuous in the y direction. It's a pattern.
- one slit 21 adjacent in the y direction is arranged at an intermediate position between two slits aligned in the x direction.
- a second pattern of slits 21 is formed in the plurality of second heat transfer promoting portions 17_2_1.
- the second pattern includes one slit 21 arranged in the x direction in the second heat transfer promoting portion 17_2_1 and two slits 21 arranged on both sides of the one slit 21 below the one slit 21 in the y direction. is a continuous pattern in the y direction.
- the arrangement of the slits 21 is shifted in the y direction between the first pattern and the second pattern.
- the sum of the number of slits 21 formed in the first heat transfer promoting portion 17_1_1 and the number of slits 21 formed in the second heat transfer promoting portion 17_2_1 is three and is constant.
- the first pattern and the second pattern are not limited to the example shown in FIG. 7, and patterns of various numbers of slits 21 can be adopted.
- it is a pattern in which a set of three slits 21 arranged in the x direction and a single slit 21 arranged in the x direction is repeatedly arranged in the y direction.
- FIG. 8 is a diagram showing a modification of the heat exchange member 14 of the heat exchanger 11 according to the fourth embodiment.
- the first flat portion 17_1_2 is arranged below the first heat transfer promoting portion 17_1_1 in the y direction.
- the first heat transfer promoting portion 17_1_1 is arranged in the y direction via the first flat portion 17_1_2.
- a first pattern of square uneven portions 22 is formed on the plurality of first heat transfer promoting portions 17_1_1.
- the first pattern includes two uneven portions 22 arranged in the x-direction on the first heat transfer promoting portion 17_1_1 and one uneven portion 22 provided adjacent to the two uneven portions 22 in the y-direction.
- the pattern is continuous in the y direction via the flat portion 17_1_2.
- a second pattern of square uneven portions 22 is formed on the plurality of second heat transfer promoting portions 17_2_1.
- the second pattern consists of two uneven portions 22 arranged in the x-direction on the second heat transfer promoting portion 17_2_1 and one uneven portion 22 arranged below the two uneven portions 22 in the y-direction.
- the pattern is continuous in the y direction via the flat portion 17_2_2.
- the arrangement of the uneven portions 22 is shifted in the y direction, which is the second direction, between the first pattern and the second pattern.
- the sum of the number of uneven portions 22 formed in the first heat transfer promoting portion 17_1_1 and the number of uneven portions 22 formed in the second heat transfer promoting portion 17_2_1 is constant at 3. be.
- first flat portion 17_1_2 and the second flat portion 17_2_2 may be omitted.
- the first pattern of arrangement of slits or unevenness provided in the first heat transfer promoting portion and the second pattern of arrangement of slits or unevenness provided in the second heat transfer promoting portion The pattern is offset in the second direction. Therefore, the pressure loss distribution in the y direction of the airflow can be reduced. Thereby, the heat transfer coefficient of the fins 16 of the heat exchanger 11 is improved.
- the first pattern and the second pattern can be formed by progressive pressing.
- Embodiment 5 Next, the heat exchanger 11 according to Embodiment 5 will be described.
- FIG. 9 is a diagram showing the heat exchange member 14 of the heat exchanger 11 according to the fifth embodiment.
- white arrows indicate the direction of gas flow.
- the plurality of heat exchange members 14 shown in FIG. 2 are provided in at least two rows in the x direction. indicates
- the fins 16 are provided on the first heat transfer tube 15_1 along the y direction, which is the vertical direction.
- the first heat transfer pipe 15_1 is provided between the first header tank 12_1 and the second header tank 13_1.
- the fin 16 has a first extension 16_1 and a second extension 16_2.
- the first extending portion 16_1 of the fin 16 has a rectangular shape, one of the long sides is attached to the first heat transfer tube 15_1 along the y direction, and the short side extends windward along the x direction. are arranged as follows.
- the second extending portion 16_2 of the fin 16 has a rectangular shape, one of the long sides is attached to the first heat transfer tube 15_1 along the y direction, and the short side extends downwind along the x direction. are arranged as follows.
- the first extending portion 16_1 is provided upstream of the gas passing through the fins 16 .
- the first extending portion 16_1 has a rectangular shape when viewed in the z-direction, and its long side is provided on the first heat transfer tube 15_1.
- the first extension portion 16_1 is provided with a first heat transfer enhancement region 17_1 that improves the heat transfer coefficient of the first extension portion 16_1 with the gas.
- the first heat transfer enhancing region 17_1 includes a plurality of first heat transfer enhancing portions 17_1_1 arranged along the y direction to improve the heat transfer coefficient with gas, and a plurality of first flattened regions 17_1_1 arranged along the y direction. 17_1_2.
- the first heat transfer promoting portions 17_1_1 and the first flat portions 17_1_2 are alternately arranged along the y direction.
- the first flat portion 17_1_2 is a flat rectangular region of the fin 16 between the first heat transfer promoting portions 17_1_1.
- the length in the y direction of the first flat portion 17_1_2 is the same as the length in the y direction of the first heat transfer promoting portion 17_1_1.
- the second extending portion 16_2 is provided downstream of the gas passing through the fins 16 .
- the second extending portion 16_2 has a rectangular shape when viewed in the z-direction, and the long side thereof is provided on the first heat transfer tube 15_1.
- the second extension portion 16_2 is provided with a second heat transfer enhancement region 17_2 that improves the heat transfer rate between the second extension portion 16_2 and the gas.
- the second heat transfer enhancing regions 17_2 are arranged along the y direction and include a plurality of second heat transfer enhancing portions 17_2_1 that improve the heat transfer coefficient with the gas, and a plurality of first flattened portions 17_2_1 arranged along the y direction. 17_1_2.
- the second heat transfer promoting portions 17_2_1 and the second flat portions 17_2_2 are alternately arranged along the y direction.
- the second flat portion 17_2_2 is a flat rectangular region of the fin 16 between the second heat transfer promoting portions 17_2_1.
- the length in the y direction of the second flat portion 17_2_2 is the same as the length in the y direction of the second heat transfer promoting portion 17_2_1.
- a second heat transfer promoting portion 17_2_1 is arranged in the x direction of the first heat transfer promoting portion 17_1_1, and a second flat portion 17_2_2 is arranged in the x direction of the first flat portion 17_1_2.
- a fin 16 is provided along the y direction on the second heat transfer tube 15_2.
- the second heat transfer pipe 15_2 is provided between the first header tank 12_1 and the second header tank 13_1.
- the fin 16 has a first extension 16_1 and a second extension 16_2.
- the first extension portion 16_1 of the fin 16 has a rectangular shape, one of the long sides is attached to the second heat transfer tube 15_2 along the y direction, and the short side extends windward along the x direction. are arranged as follows.
- the second extending portion 16_2 of the fin 16 has a rectangular shape, one of the long sides is attached to the second heat transfer tube 15_2 along the y direction, and the short side extends downwind along the x direction. are arranged as follows.
- the first extending portion 16_1 is provided upstream of the gas passing through the fins 16 .
- the first extending portion 16_1 has a rectangular shape when viewed in the z-direction, and its long side is provided on the first heat transfer tube 15_1.
- the first extension portion 16_1 is provided with a first heat transfer enhancement region 17_1 that improves the heat transfer coefficient of the first extension portion 16_1 with the gas.
- the first heat transfer enhancing region 17_1 includes a plurality of first heat transfer enhancing portions 17_1_1 arranged along the y direction to improve the heat transfer coefficient with gas, and a plurality of first flattened regions 17_1_1 arranged along the y direction. 17_1_2.
- the first heat transfer promoting portions 17_1_1 and the first flat portions 17_1_2 are alternately arranged along the y direction.
- the first flat portion 17_1_2 is a flat rectangular region of the fin 16 between the first heat transfer promoting portions 17_1_1.
- the length in the y direction of the first flat portion 17_1_2 is the same as the length in the y direction of the first heat transfer promoting portion 17_1_1.
- the second extending portion 16_2 is provided downstream of the gas passing through the fins 16 .
- the second extending portion 16_2 has a rectangular shape when viewed in the z-direction, and the long side thereof is provided on the first heat transfer tube 15_1.
- the second extension portion 16_2 is provided with a second heat transfer enhancement region 17_2 that improves the heat transfer rate between the second extension portion 16_2 and the gas.
- the second heat transfer enhancing regions 17_2 are arranged along the y direction and include a plurality of second heat transfer enhancing portions 17_2_1 that improve the heat transfer coefficient with the gas, and a plurality of first flattened portions 17_2_1 arranged along the y direction. 17_1_2.
- the second heat transfer promoting portions 17_2_1 and the second flat portions 17_2_2 are alternately arranged along the y direction.
- the second flat portion 17_2_2 is a flat rectangular region of the fin 16 between the second heat transfer promoting portions 17_2_1.
- the length in the y direction of the second flat portion 17_2_2 is the same as the length in the y direction of the second heat transfer promoting portion 17_2_1.
- a second heat transfer promoting portion 17_2_1 is arranged in the x direction of the first heat transfer promoting portion 17_1_1, and a second flat portion 17_2_2 is arranged in the x direction of the first flat portion 17_1_2.
- the position in the y direction of the second heat transfer promoting portion 17_2_1 formed on the fins 16 provided on the first heat transfer tube 15_1 corresponds to the position of the first heat transfer promoting portion formed on the fins 16 provided on the second heat transfer tube 15_2. It is different from the y-direction position of 17_1_1.
- FIG. 10 is a diagram showing a modification of the heat exchange member 14 of the heat exchanger 11 according to the fifth embodiment.
- white arrows indicate the direction of gas flow.
- a plurality of heat exchange members 14 shown in FIG. 2 are provided at intervals in the z direction, and are provided in three rows in the x direction.
- the first row heat exchange member 14_1, the second row heat exchange member 14_2, and the third row heat exchange member 14_3 are shown as examples.
- the first heat transfer promoting portion 17_1_1 and the first flat portion 17_1_2 formed on the fins 16 provided on the first heat transfer tube 15_1, the second heat transfer tube 15_2 and the third heat transfer tube 15_3 are the same as in FIG.
- the position in the second direction of the second heat transfer promoting portion 17_2_1 provided in the first heat transfer tube 15_1 is the second position of the first heat transfer promoting portion 17_1_1 provided in the second heat transfer tube 15_2. Different from the position of the direction.
- the y-direction position of the second heat transfer promoting portion 17_2_1 provided in the second heat transfer tube 15_2 is different from the y-direction position of the first heat transfer promoting portion 17_1_1 provided in the third heat transfer tube 15_3.
- the positions of the first heat transfer promoting portions 17_1_1 of the adjacent heat transfer tubes 15 in the second direction are different. Therefore, the pressure loss distribution of the airflow in the y direction becomes uniform, and the amount of airflow passing through the first flat portion 17_1_2 and the second flat portion 17_2_2 is reduced.
- the fins 16 extending on the windward side are formed with the first heat transfer promoting portions 17_1_1, and the fins 16 extending on the leeward side are formed with the second heat transfer promoting portions 17_2_1. is formed, the effect on the heat transfer efficiency of the fins 16 is great.
- Embodiments 1 to 5 describe that the first heat transfer promoting portion 17_1_1 and the second heat transfer promoting portion 17_2_1 may be configured by one or more of cut-and-raised portions, slits, louvers, and uneven portions. bottom.
- cut-and-raised, slits, or louvers are employed, openings are provided in the fins 16, so the plane portions of the fins 16, that is, the area for exchanging heat with gas is reduced.
- the entire outer peripheral surface of the heat transfer tubes and the fins are in contact with each other.
- the direction of heat conduction to the fins 16 is 360 degrees when viewed in cross section of the heat transfer tube 15 . Therefore, the effect of providing the openings in the fins 16 to reduce the heat exchange area is limited.
- the fins 16 are connected to the sides of the heat transfer tubes 15 along the y direction or to the xy plane (FIG. 4) of the heat transfer tubes 15. Therefore, the direction of heat conduction from the heat transfer tube 15 to the fins 16 is limited. Therefore, in Embodiments 1 to 5, the effect of the openings in the fins 16 on the reduction in the heat exchange area is greater than in the heat exchanger in which the heat transfer tubes pass through the fins. Therefore, the opening area of the fins 16 and the arrangement of the first heat transfer promoting portion 17_1_1 and the second heat transfer promoting portion 17_2_1 in Embodiments 1 to 5 will be described below.
- FIG. 11 is a diagram showing the arrangement of the first heat transfer promoting portion 17_1_1 and the second heat transfer promoting portion 17_2_1 formed on the fin 16 of the comparative example.
- FIG. 11 shows a first heat transfer tube 15_1 and a second heat transfer tube 15_2 spaced apart in the x direction.
- the second heat transfer promoting portion 17_2_1 is arranged in the x direction of the first heat transfer promoting portion 17_1_1.
- a second flat portion 17_2_2 is arranged in the x direction of the first flat portion 17_1_2.
- FIG. 12 is a diagram showing the relationship between the slit area ratio and the air-side heat transfer performance.
- the "slit area ratio” is slit area/fin 16 area.
- Air-side heat transfer performance is the air-side heat transfer area of the fins 16 ⁇ air-side heat conductivity.
- g_1 indicates the characteristics of the slit area ratio and the air-side heat transfer performance of the heat exchanger 11 shown in FIG. g_2 represents the characteristics of the slit area ratio and the air-side heat transfer performance of the heat exchanger 11 shown in FIG. g_3 shows the characteristics of the slit area ratio and the air-side heat transfer performance when the heat exchangers 11 shown in FIG. 5 are arranged in two rows in the x direction.
- g_4 shows the characteristics of the slit area ratio and the air-side heat transfer performance when the heat exchangers 11 shown in FIG. 8 are arranged in two rows in the x direction.
- the fin 16 shown in FIG. 8 has the highest air-side heat transfer performance.
- the fins 16 shown in FIG. 5 and the fins 16 shown in FIG. 9 have high air-side heat transfer performance, and the fins 16 shown in FIGS.
- the heat transfer performance on the air side is higher than that of the fins 16 .
- the other fins 16 shown in the first to fifth embodiments also have higher air-side heat transfer performance than the fins 16 shown in FIG. 11 as a comparative example.
- the air side heat transfer performance is higher than when it is 15%. . Therefore, when adopting the configuration of the heat exchanger 11 of FIG. 9, it is desirable to set the slit area ratio to 7.5%.
- the air-side heat transfer performance peaks at a slit area ratio of 7.5%.
- the slit area ratio is preferably 5 to 10% for any of the patterns of Embodiments 1 to 5.
- the shapes of the first heat transfer promoting portion 17_1_1 and the second heat transfer promoting portion 17_2_1 may be different.
- the first heat transfer promoting portion 17_1_1 may be the slit 21, and the second heat transfer promoting portion 17_2_1 may be uneven.
- the number of slits 21 of the first heat transfer promoting portion 17_1_1 may be smaller than the number of slits 21 of the second heat transfer promoting portion 17_2_1.
- first heat transfer promoting portion 17_1_1 may be different.
- first heat transfer promoting portion 17_1_1 may have slits 21 and louvers.
- second heat transfer promoting portion 17_2_1 may also have a different shape.
- the second heat transfer promoting portion 17_2_1 may have a slit 21 and an uneven shape.
- Embodiments 1 to 5 are presented as examples and are not intended to limit the scope of claims. Embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the gist of the embodiments. These embodiments and modifications thereof are included in the scope and gist of the embodiments.
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Abstract
Description
図1は、実施の形態1による冷凍サイクル装置を示す模式的な構成図である。実施の形態1では、冷凍サイクル装置が空気調和装置1として用いられている。空気調和装置1は、圧縮機2、室外熱交換器3、膨張弁4、室内熱交換器5及び四方弁6を有している。この例では、圧縮機2、室外熱交換器3、膨張弁4及び四方弁6が室外機に設けられ、室内熱交換器5が室内機に設けられている。
実施の形態2に係る熱交換器11の熱交換部材14は、実施の形態1に係る熱交換器11の熱交換部材14に対して、第1平坦部17_1_2及び第1平坦部17_1_2の大きさが異なる。
実施の形態3に係る熱交換器11の熱交換部材14は、実施の形態1に係る熱交換器11の熱交換部材14で設けられていた第1平坦部17_1_2及び第2平坦部17_2_2を有しないものである。
実施の形態4に係る熱交換器11の熱交換部材14は、第1伝熱促進部17_1_1に形成されたスリット21の配置の第1パターンと、第2伝熱促進部17_2_1に形成されたスリット21の配置の第2パターンとがx方向においてずれている。
図8に示すように、第1伝熱促進部17_1_1のy方向下部に第1平坦部17_1_2が配置される。第1伝熱促進部17_1_1は、第1平坦部17_1_2を介して、y方向に配置される。
次に、実施の形態5に係る熱交換器11について説明する。
伝熱管15が円管又は扁平管の場合、伝熱管15の前後には、気流が流れにくいので、実施の形態1~実施の形態5のように、フィン16に第1伝熱促進領域17_1及び第2伝熱促進領域17_2の双方を設けるという技術的思想はそもそもない。さらに、第1伝熱促進領域17_1における第1伝熱促進部17_1_1及び第2伝熱促進領域17_2における第2伝熱促進部17_2_1の配置又は組み合わせ等により、伝熱効果を促進するという技術的思想が存在しない。
Claims (9)
- 気体の流れる第1方向に交差する第2方向に延びる伝熱管と、
前記第1方向及び前記第2方向に沿った面を有し、前記伝熱管に設けられたフィンと
を具備し、
前記フィンは、
前記第1方向において前記伝熱管よりも前記気体の上流側に設けられ、熱伝達率を向上する第1伝熱促進領域を有する第1延在部と、
前記第1方向において前記伝熱管よりも前記気体の下流側に設けられ、熱伝達率を向上する第2伝熱促進領域を有する第2延在部と
を具備する熱交換器。 - 前記第1伝熱促進領域は、
前記第2方向に沿って配置され、熱伝達率を向上する複数の第1伝熱促進部と、
前記第2方向において、隣り合う前記第1伝熱促進部の間に配置される第1平坦部と
を有し、
前記第2伝熱促進領域は、
前記第2方向に沿って配置され、熱伝達率を向上する複数の第2伝熱促進部と、
前記第2方向において、隣り合う前記第2伝熱促進部の間に配置される第2平坦部と
を有する
請求項1記載の熱交換器。 - 前記第1伝熱促進部と前記第1平坦部とは、前記第2方向に沿って交互に配置され、
前記第2伝熱促進部と前記第2平坦部とは、前記第2方向に沿って交互に配置され、
前記第1方向において、前記第1伝熱促進部と並んだ前記第2伝熱促進領域には前記第2平坦部が配置され、前記第1方向において、前記第1平坦部と並んだ前記第2伝熱促進領域には前記第2伝熱促進部が配置される
請求項2記載の熱交換器。 - 前記伝熱管は、前記第1方向及び前記第2方向に交差する第3方向に所定間隔を置いて配置された複数の伝熱管を有する
請求項2又は3に記載の熱交換器。 - 前記第1伝熱促進部、前記第2伝熱促進部、前記第1平坦部及び前記第2平坦部の前記第2方向の長さは同じであり、
前記第1伝熱促進部の前記第2方向における位置は、前記第2伝熱促進領域における前記第2平坦部の前記第2方向における位置と同じであり、
前記第1平坦部の前記第2方向における位置は、前記第2伝熱促進領域における前記第2伝熱促進部の前記第2方向における位置と同じである
請求項2~4のいずれか1項に記載の熱交換器。 - 前記第1伝熱促進領域は、前記第2方向に沿って配置され、熱伝達率を向上する複数の第1伝熱促進部を有し、
前記第2伝熱促進領域は、前記第2方向に沿って配置され、熱伝達率を向上する複数の第2伝熱促進部を有し、
前記第1伝熱促進部には、切り起こし、スリット、ルーバー及び凹凸部のうちのいずれかが形成されており、
前記第2伝熱促進部には、切り起こし、スリット、ルーバー及び凹凸部のうちのいずれかが形成されており、
前記第1伝熱促進部に形成された切り起こし、スリット、ルーバー及び凹凸部のうちのいずれかの前記第1方向における数及び前記第2伝熱促進部に形成された切り起こし、スリット、ルーバー及び凹凸部のうちのいずれか1つの前記第1方向における数の和が一定である
請求項1記載の熱交換器。 - 前記第1伝熱促進部は、切り起こし、スリット、ルーバー及び凹凸部のうちのいずれかであり、
前記第2伝熱促進部は、切り起こし、スリット、ルーバー及び凹凸部のうちのいずれかである
請求項2~5のいずれか1項に記載の熱交換器。 - 前記複数の第1伝熱促進部には、形成された前記スリット、前記ルーバー及び前記凹凸部のうちのいずれか1つの第1パターンが形成され、
前記複数の第2伝熱促進部には、形成された前記スリット、前記ルーバー及び前記凹凸部のうちのいずれか1つの第2パターンが形成され、
前記第1パターンと前記第2パターンとは、前記第2方向においてずれている
請求項6記載の熱交換器。 - 前記伝熱管と前記フィンとをそれぞれ含む第1組及び第2組を有し、
前記第2組の前記伝熱管は、前記第1組の前記伝熱管に前記第1方向に間隔を置いて設けられており、
前記第1組の前記フィンに形成された前記第2伝熱促進部の前記第2方向における位置は、前記第2組の前記フィンに形成された前記第1伝熱促進部の前記第2方向における位置と異なる
請求項2~8のいずれか1項に記載の熱交換器。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6237692A (ja) * | 1985-08-12 | 1987-02-18 | Hitachi Ltd | 熱交換器 |
JP2003247795A (ja) * | 2002-02-22 | 2003-09-05 | Toshiba Kyaria Kk | 熱交換器 |
WO2019026243A1 (ja) | 2017-08-03 | 2019-02-07 | 三菱電機株式会社 | 熱交換器、及び冷凍サイクル装置 |
WO2020044391A1 (ja) * | 2018-08-27 | 2020-03-05 | 三菱電機株式会社 | 熱交換器、熱交換器ユニット、及び冷凍サイクル装置 |
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- 2021-12-06 CN CN202180104564.8A patent/CN118339417A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6237692A (ja) * | 1985-08-12 | 1987-02-18 | Hitachi Ltd | 熱交換器 |
JP2003247795A (ja) * | 2002-02-22 | 2003-09-05 | Toshiba Kyaria Kk | 熱交換器 |
WO2019026243A1 (ja) | 2017-08-03 | 2019-02-07 | 三菱電機株式会社 | 熱交換器、及び冷凍サイクル装置 |
WO2020044391A1 (ja) * | 2018-08-27 | 2020-03-05 | 三菱電機株式会社 | 熱交換器、熱交換器ユニット、及び冷凍サイクル装置 |
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