US20230366639A1 - Heat Exchanger and Refrigeration Cycle Apparatus - Google Patents

Heat Exchanger and Refrigeration Cycle Apparatus Download PDF

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Publication number
US20230366639A1
US20230366639A1 US18/247,090 US202018247090A US2023366639A1 US 20230366639 A1 US20230366639 A1 US 20230366639A1 US 202018247090 A US202018247090 A US 202018247090A US 2023366639 A1 US2023366639 A1 US 2023366639A1
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United States
Prior art keywords
protruding portion
fin
heat exchanger
protruding
longitudinal direction
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Application number
US18/247,090
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English (en)
Inventor
Satoru Yanachi
Tsuyoshi Maeda
Akira YATSUYANAGI
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
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Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MAEDA, TSUYOSHI, YANACHI, SATORU, YATSUYANAGI, Akira
Publication of US20230366639A1 publication Critical patent/US20230366639A1/en
Pending legal-status Critical Current

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    • 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
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/006—Preventing deposits of ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/06—Reinforcing means for fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements

Definitions

  • the present disclosure relates to a heat exchanger and a refrigeration cycle apparatus.
  • a fin-and-tube-type heat exchanger including a fin and a heat transfer tube passing through the fin.
  • a fin includes a seat portion (planar portion), and peak and valley portions.
  • the seat portion is concentrically formed around an outer circumference of a fin collar to guide air flowing around a heat transfer tube to thereby reduce a wake region.
  • the seat portion is provided with opened front and rear portions.
  • the peak and valley portions are continuously formed between the fin collars to provide airflow variation.
  • the peak and valley portions are continuously formed along an air flow direction, and thus, a boundary layer starting from the peak portion is formed. Therefore, the valley portion forms a dead water region. As a result, a local heat transfer coefficient in the valley portion decreases, which leads to a decrease in heat transfer coefficient of the entire fin. In addition, stress concentrates on the planar portion provided with no peak and valley portions, and thus, the fin has insufficient strength. Furthermore, when the heat exchanger functions as an evaporator, frost tends to form on the heat exchanger on the windward side of air blown by a fan or the like.
  • the present disclosure has been made in view of the problem above, and an object of the present disclosure is to provide a heat exchanger and a refrigeration cycle apparatus that can improve heat transfer efficiency, improve strength of a fin, and suppress a decrease in frost formation resistance.
  • a heat exchanger of the present disclosure includes: a fin extending in a widthwise direction along an air flow direction and extending in a longitudinal direction crossing the air flow direction; and a heat transfer tube passing through the fin.
  • the fin has a through hole.
  • the heat transfer tube is inserted in the through hole.
  • the fin includes a planar portion, and a first protruding portion, a second protruding portion and a third protruding portion protruding from the planar portion.
  • the first protruding portion is curved along the longitudinal direction.
  • the second protruding portion is located between the first protruding portion and the through hole and surrounds the through hole.
  • the third protruding portion extends linearly in the longitudinal direction and is located on a leeward side relative to the first protruding portion and the second protruding portion in the air flow direction.
  • the first protruding portion and the second protruding portion protrude from the planar portion, and thus, an influence of a dead water region can be suppressed. Therefore, an improvement in heat transfer coefficient of the fin can be achieved.
  • the strength of the fin can be improved by the first protruding portion, the second protruding portion and the third protruding portion.
  • the third protruding portion is located on the leeward side relative to the first protruding portion and the second protruding portion in the air flow direction, and thus, the formation of frost on the fin can be suppressed on the windward side. Therefore, a decrease in frost formation resistance can be suppressed.
  • FIG. 1 is a perspective view schematically showing a configuration of a heat exchanger according to a first embodiment.
  • FIG. 2 is a cross-sectional view of a region A in FIG. 1 taken along line II-II.
  • FIG. 3 is an end view taken along line in FIG. 2 .
  • FIG. 4 is an end view taken along line IV-IV in FIG. 2 .
  • FIG. 5 is a refrigerant circuit diagram showing a refrigeration cycle apparatus according to the first embodiment.
  • FIG. 6 is a cross-sectional view schematically showing a configuration of a portion of a heat exchanger according to a second embodiment corresponding to FIG. 2 .
  • FIG. 7 is an end view taken along line VII-VII in FIG. 6 .
  • FIG. 8 is an end view taken along line VIII-VIII in FIG. 6 .
  • FIG. 9 is a cross-sectional view schematically showing a configuration of a portion of a heat exchanger according to a third embodiment corresponding to FIG. 2 .
  • FIG. 10 is an end view taken along line X-X in FIG. 9 .
  • FIG. 11 is an end view taken along line XI-XI in FIG. 9 .
  • FIG. 12 is a cross-sectional view schematically showing a configuration of a portion of a heat exchanger according to a fourth embodiment corresponding to FIG. 2 .
  • FIG. 13 is an end view taken along line XIII-XIII in FIG. 12 .
  • FIG. 14 is an end view taken along line XIV-XIV in FIG. 12 .
  • FIGS. 1 to 4 A configuration of a heat exchanger HE according to a first embodiment will be described with reference to FIGS. 1 to 4 .
  • heat exchanger HE includes a fin F and a heat transfer tube P.
  • Fin F extends in a widthwise direction D 1 along an air flow direction D 0 and extends in a longitudinal direction D 2 crossing air flow direction D 0 .
  • Fin F is formed in a substantially rectangular shape.
  • Heat transfer tube P passes through fin F.
  • Heat transfer tube P is a circular pipe.
  • Fin F has a through hole TH.
  • Through hole TH is formed in a circular shape. Heat transfer tube P is inserted in through hole TH.
  • heat exchanger HE includes a plurality of fins F and a plurality of heat transfer tubes P.
  • the plurality of fins F are stacked on top of each other at intervals.
  • Heat transfer tube P passes through the plurality of fins F in a direction D 3 of stacking of the plurality of fins F.
  • Each of the plurality of fins F has a plurality of through holes TH.
  • the plurality of through holes TH are aligned in longitudinal direction D 2 of fin F.
  • the plurality of through holes TH are spaced apart from each other in longitudinal direction D 2 of fin F.
  • Widthwise direction D 1 of fin F is orthogonal to longitudinal direction D 2 .
  • Widthwise direction D 1 of fin F may be a horizontal direction.
  • Longitudinal direction D 2 of fin F may be an up-down direction (vertical direction).
  • Direction D 3 of stacking of fins F is orthogonal to widthwise direction D 1 and longitudinal direction D 2 of fin F.
  • Heat transfer tube P includes a plurality of heat transfer portions P 1 and a plurality of connection portions P 2 .
  • Each of the plurality of heat transfer portions P 1 passes through the plurality of fins F.
  • Each of the plurality of heat transfer portions P 1 is inserted in the plurality of through holes TH in direction D 3 of stacking of the plurality of fins F.
  • the plurality of heat transfer portions P 1 are formed linearly.
  • Each of the plurality of heat transfer portions P 1 extends in direction D 3 of stacking of the plurality of fins F.
  • Each of the plurality of connection portions P 2 is a portion that connects the plurality of heat transfer portions P 1 outside the plurality of fins F.
  • Each of the plurality of connection portions P 2 is formed in a U-shape.
  • Each of the plurality of connection portions P 2 connects two of the plurality of heat transfer tubes P that are adjacent to each other in longitudinal direction D 2 of fin F.
  • Each of the plurality of connection portions P 2 is connected to ends of the plurality of heat transfer portions P 1 in direction D 3 of stacking of the plurality of fins F.
  • the plurality of heat transfer portions P 1 are disposed in multiple stages in longitudinal direction D 2 of fin F. In the present embodiment, the plurality of heat transfer portions P 1 are disposed in four stages along longitudinal direction D 2 of fin F.
  • the plurality of heat transfer portions P 1 are connected by the plurality of connection portions P 2 as follows.
  • Heat transfer portion P 1 in the first stage is connected to heat transfer portion P 1 in the second stage by connection portion P 2 on the back side in direction D 3 of stacking of the plurality of fins F.
  • Heat transfer portion P 1 in the second stage is connected to heat transfer portion P 1 in the third stage by connection portion P 2 on the front side in direction D 3 of stacking of the plurality of fins F.
  • Heat transfer portion P 1 in the third stage is connected to heat transfer portion P 1 in the fourth stage by connection portion P 2 on the back side in direction D 3 of stacking of the plurality of fins F.
  • heat transfer tube P is configured to meander in longitudinal direction D 2 of fin F.
  • Fin F includes a planar portion SP, a first protruding portion MP 1 , a second protruding portion MP 2 , a third protruding portion MP 3 , and a fin collar FC.
  • Planar portion SP is formed in a planar shape.
  • Planar portion SP is formed in a flat plate shape.
  • First protruding portion MP 1 , second protruding portion MP 2 and third protruding portion MP 3 protrude from planar portion SP.
  • first protruding portion MP 1 , second protruding portion MP 2 and third protruding portion MP 3 protrude from planar portion SP in the same direction.
  • fin F includes a plurality of first protruding portions MP 1 and a plurality of second protruding portions MP 2 .
  • First protruding portion MP 1 is curved along longitudinal direction D 2 of fin F. First protruding portion MP 1 is curved to protrude in longitudinal direction D 2 of fin F. First protruding portion MP 1 has a portion extending along longitudinal direction D 2 of fin F. First protruding portion MP 1 also has a portion extending along widthwise direction D 1 of fin F. First protruding portion MP 1 is located to be displaced from the center of through hole TH in widthwise direction D 1 of fin F. In the present embodiment, first protruding portion MP 1 is formed in a circular arc shape. In the present embodiment, first protruding portions MP 1 have the same width.
  • the plurality of first protruding portions MP 1 are aligned in longitudinal direction D 2 of fin F.
  • four first protruding portions MP 1 are located between two through holes TH in longitudinal direction D 2 of fin F.
  • Two first protruding portions MP 1 are located on each of the upper side and the lower side of one through hole TH in longitudinal direction D 2 of fin F.
  • Two first protruding portions MP 1 located on the upper side of one through hole TH in longitudinal direction D 2 of fin F are located to be adjacent to each other in longitudinal direction D 2 of fin F.
  • Two first protruding portions MP 1 located on the lower side of one through hole TH in longitudinal direction D 2 of fin F are located to be adjacent to each other in longitudinal direction D 2 of fin F.
  • Two first protruding portions MP 1 located to be adjacent to each other are curved to the same side along longitudinal direction D 2 . Also, two first protruding portions MP 1 located to sandwich one through hole TH in longitudinal direction D 2 of fin F are curved to the opposite sides along longitudinal direction D 2 . Two first protruding portions MP 1 located close to the upper through hole TH between two through holes TH are curved to protrude downward. Two first protruding portions MP 1 located close to the lower through hole TH between two through holes TH are curved to protrude upward. The outer first protruding portion MP 1 of the two first protruding portions MP 1 curved to protrude downward is spaced apart from the outer first protruding portion MP 1 of the two first protruding portions MP 1 curved to protrude upward.
  • the plurality of first protruding portions MP 1 are formed in the same shape except for the direction in which first protruding portions MP 1 are curved along longitudinal direction D 2 of fin F.
  • the plurality of first protruding portions MP 1 have the same radius of curvature.
  • the respective centers of curvature of the plurality of first protruding portions MP 1 are linearly aligned with each other in longitudinal direction D 2 of fin F.
  • the plurality of first protruding portions MP 1 have the same width.
  • the plurality of first protruding portions MP 1 have the same length.
  • Each of the plurality of first protruding portions MP 1 is longer than each of the plurality of second protruding portions MP 2 in widthwise direction D 1 of fin F.
  • each of the plurality of first protruding portions MP 1 is located between corresponding ones of the plurality of second protruding portions MP 2 .
  • the respective centers of curvature of the plurality of first protruding portions MP 1 are linearly aligned with the respective centers of the plurality of second protruding portions MP 2 in longitudinal direction D 2 of fin F.
  • the inner first protruding portion MP 1 of the two first protruding portions MP 1 located on the upper side of through hole TH in longitudinal direction D 2 of fin F is adjacent to second protruding portion MP 2 .
  • the inner first protruding portion MP 1 of the two first protruding portions MP 1 located on the lower side of through hole TH in longitudinal direction D 2 of fin F is adjacent to second protruding portion MP 2 .
  • Second protruding portion MP 2 is located between first protruding portion MP 1 and through hole TH. Second protruding portion MP 2 surrounds through hole TH. Second protruding portion MP 2 is formed in an annular shape. Second protruding portion MP 2 protrudes from planar portion SP more than first protruding portion MP 1 .
  • the plurality of second protruding portions MP 2 are formed in the same shape.
  • the respective centers of the plurality of second protruding portions MP 2 are aligned linearly in longitudinal direction D 2 of fin F.
  • the plurality of second protruding portions MP 2 have the same width.
  • the plurality of second protruding portions MP 2 have the same diameter.
  • Third protruding portion MP 3 extends linearly in longitudinal direction D 2 of fin F. Third protruding portion MP 3 extends continuously from one end to the other end of fin F in longitudinal direction D 2 . Third protruding portion MP 3 is located on the leeward side relative to first protruding portion MP 1 and second protruding portion MP 2 in air flow direction D 0 . Third protruding portion MP 3 is spaced apart from first protruding portion MP 1 and second protruding portion MP 2 in widthwise direction D 1 of fin F. Third protruding portion MP 3 is located on a leeward end of fin F in widthwise direction D 1 .
  • no protruding portion is located on the windward side relative to first protruding portion MP 1 and second protruding portion MP 2 in air flow direction D 0 .
  • the windward side of fin F is at a height position lower than that of the leeward side of fin F.
  • First protruding portion MP 1 , second protruding portion MP 2 and third protruding portion MP 3 protrude from planar portion SP less than fin collar FC.
  • Fin collar FC is formed in a cylindrical shape. Heat transfer tube P is inserted in fin collar FC. The outer circumferential surface of heat transfer tube P fits onto the inner circumferential surface of fin collar FC. Fin collar FC protrudes from planar portion SP. In the present embodiment, fin collar FC protrudes from planar portion SP in the same direction as that of first protruding portion MP 1 , second protruding portion MP 2 and third protruding portion MP 3 .
  • Fin collar FC includes a circumferential wall and a flange.
  • the circumferential wall protrudes from planar portion SP.
  • the flange extends outward from the circumferential wall.
  • the flange is provided at the edge of the circumferential wall opposite to planar portion SP.
  • fin F includes a plurality of fin collars FC.
  • Refrigeration cycle apparatus 100 is, for example, an air conditioner or a refrigerator.
  • the first embodiment will describe an air conditioner as an example of refrigeration cycle apparatus 100 .
  • Refrigeration cycle apparatus 100 includes a refrigerant circuit RC, refrigerant, a controller CD, and air blowers 6 , 7 .
  • Refrigeration cycle apparatus 100 includes a refrigerant circulation device RCD.
  • Refrigerant circulation device RCD is configured to circulate refrigerant for performing heat exchange with air in heat exchanger HE.
  • the first embodiment will describe refrigeration cycle apparatus 100 including a compressor 1 incorporated as refrigerant circulation device RCD.
  • Refrigerant circulation device RCD may be a refrigerant pump.
  • Refrigerant circuit RC includes compressor 1 , a four-way valve 2 , an outdoor heat exchanger 3 , a pressure reducing valve 4 , and an indoor heat exchanger 5 .
  • Heat exchanger HE described above may be applied to at least one of outdoor heat exchanger 3 and indoor heat exchanger 5 .
  • Compressor 1 , four-way valve 2 , outdoor heat exchanger 3 , pressure reducing valve 4 , and indoor heat exchanger 5 are connected by a pipe.
  • Refrigerant circuit RC is configured to circulate the refrigerant.
  • Refrigerant circuit RC is configured to perform a refrigeration cycle in which the refrigerant circulates while changing its phase.
  • Compressor 1 four-way valve 2 , outdoor heat exchanger 3 , pressure reducing valve 4 , controller CD, and air blower 6 are housed in an outdoor unit 101 .
  • Indoor heat exchanger 5 and air blower 7 are housed in an indoor unit 102 .
  • Refrigerant circuit RC is configured such that the refrigerant circulates in order of compressor 1 , four-way valve 2 , outdoor heat exchanger (condenser) 3 , pressure reducing valve 4 , indoor heat exchanger (evaporator) 5 , and four-way valve 2 during a cooling operation.
  • Refrigerant circuit RC is also configured such that the refrigerant circulates in order of compressor 1 , four-way valve 2 , indoor heat exchanger (condenser) 5 , pressure reducing valve 4 , outdoor heat exchanger (evaporator) 3 , and four-way valve 2 during a heating operation.
  • the refrigerant flows through refrigerant circuit RC in order of compressor 1 , the condenser, pressure reducing valve 4 , and the evaporator.
  • Controller CD is configured to control each device of refrigeration cycle apparatus 100 by, for example, performing calculations or providing instructions. Controller CD is electrically connected to compressor 1 , four-way valve 2 , pressure reducing valve 4 , air blowers 6 , 7 , and the like and is configured to control the operations thereof.
  • Compressor 1 is configured to compress the refrigerant for performing heat exchange with the air in heat exchanger HE. Compressor 1 is configured to compress the sucked refrigerant and discharge the compressed refrigerant. Compressor 1 may be configured to have a variable capacity. Compressor 1 may be configured to have a capacity changing through the adjustment of the rotation speed of compressor 1 based on an instruction from controller CD.
  • Four-way valve 2 is configured to switch a refrigerant flow such that the refrigerant compressed by compressor 1 flows to outdoor heat exchanger 3 or indoor heat exchanger 5 .
  • Four-way valve 2 is configured such that the refrigerant discharged from compressor 1 flows to outdoor heat exchanger (condenser) 3 during the cooling operation.
  • Four-way valve 2 is also configured such that the refrigerant discharged from compressor 1 flows to indoor heat exchanger (evaporator) 5 during the heating operation.
  • Outdoor heat exchanger 3 is configured to exchange heat between the refrigerant flowing inside outdoor heat exchanger 3 and the air flowing outside outdoor heat exchanger 3 .
  • Outdoor heat exchanger 3 is configured to function as the condenser that condenses the refrigerant during the cooling operation and function as the evaporator that evaporates the refrigerant during the heating operation.
  • Pressure reducing valve 4 is configured to reduce pressure by expanding the refrigerant condensed by the condenser. Pressure reducing valve 4 is configured to reduce the pressure of the refrigerant condensed by outdoor heat exchanger (condenser) 3 during the cooling operation and reduce the pressure of the refrigerant condensed by indoor heat exchanger (evaporator) 5 during the heating operation. Pressure reducing valve 4 is, for example, a solenoid valve.
  • Indoor heat exchanger 5 is configured to exchange heat between the refrigerant flowing inside indoor heat exchanger 5 and the air flowing outside indoor heat exchanger 5 .
  • Indoor heat exchanger 5 is configured to function as the evaporator that evaporates the refrigerant during the cooling operation and function as the condenser that condenses the refrigerant during the heating operation.
  • Air blower 6 is configured to blow outdoor air to outdoor heat exchanger 3 .
  • air blower 6 is configured to supply air to outdoor heat exchanger 3 .
  • Air blower 6 may be configured to adjust the amount of the air flowing around outdoor heat exchanger 3 through the adjustment of the rotation speed of air blower 6 based on an instruction from controller CD, thereby adjusting an amount of heat exchange between the refrigerant and the air.
  • Air blower 7 is configured to blow indoor air to indoor heat exchanger 5 .
  • air blower 7 is configured to supply air to indoor heat exchanger 5 .
  • Air blower 7 may be configured to adjust the amount of the air flowing around indoor heat exchanger 5 through the adjustment of the rotation speed of air blower 7 based on an instruction from controller CD, thereby adjusting an amount of heat exchange between the refrigerant and the air.
  • FIG. 5 the solid arrows indicate a refrigerant flow during the cooling operation, and the dashed arrows indicate a refrigerant flow during the heating operation.
  • Refrigeration cycle apparatus 100 can selectively perform the cooling operation and the heating operation.
  • the refrigerant circulates through refrigerant circuit RC in order of compressor 1 , four-way valve 2 , outdoor heat exchanger 3 , pressure reducing valve 4 , indoor heat exchanger 5 , and four-way valve 2 .
  • outdoor heat exchanger 3 functions as the condenser. Heat is exchanged between the refrigerant flowing through outdoor heat exchanger 3 and the air blown by air blower 6 .
  • indoor heat exchanger 5 functions as the evaporator. Heat is exchanged between the refrigerant flowing through indoor heat exchanger 5 and the air blown by air blower 7 .
  • the refrigerant circulates through refrigerant circuit RC in order of compressor 1 , four-way valve 2 , indoor heat exchanger 5 , pressure reducing valve 4 , outdoor heat exchanger 3 , and four-way valve 2 .
  • indoor heat exchanger 5 functions as the condenser. Heat is exchanged between the refrigerant flowing through indoor heat exchanger 5 and the air blown by air blower 7 .
  • outdoor heat exchanger 3 functions as the evaporator. Heat is exchanged between the refrigerant flowing through outdoor heat exchanger 3 and the air blown by air blower 6 .
  • first protruding portion MP 1 and second protruding portion MP 2 protrude from planar portion SP, and thus, the effect of a dead water region can be suppressed. Therefore, a heat transfer coefficient of fin F can be improved. Also, the strength of fin F can be improved by first protruding portion MP 1 , second protruding portion MP 2 and third protruding portion MP 3 . Furthermore, third protruding portion MP 3 is located on the leeward side relative to first protruding portion MP 1 and second protruding portion MP 2 in the air flow direction, and thus, the formation of frost on fin F can be suppressed on the windward side. Therefore, a decrease in frost formation resistance can be suppressed.
  • the suppression of a decrease in frost formation resistance allows for suppression of a decrease in the volume of air passing through fin F due to frost formed on fin F.
  • heat exchanger HE functions as the evaporator
  • a decrease in the amount of heat absorbed by the evaporator can be suppressed.
  • a decrease in heating ability can be suppressed. Therefore, a decrease in comfort can be suppressed.
  • second protruding portion MP 2 is located between first protruding portion MP 1 and through hole TH and surrounds through hole TH. Therefore, the strength of fin F can be improved so as to surround through hole TH by second protruding portion MP 2 .
  • heat exchanger HE and refrigeration cycle apparatus 100 according to a second embodiment have the same configuration, operation, and function and effect as those of heat exchanger HE and refrigeration cycle apparatus 100 according to the first embodiment.
  • fin F of heat exchanger HE The structure of fin F of heat exchanger HE according to the second embodiment will be described with reference to FIGS. 6 to 8 .
  • Fin F includes a fourth protruding portion MP 4 .
  • Fourth protruding portion MP 4 protrudes from planar portion SP.
  • fourth protruding portion MP 4 protrudes from planar portion SP in the same direction as that of first protruding portion MP 1 , second protruding portion MP 2 and third protruding portion MP 3 .
  • Fourth protruding portion MP 4 extends linearly in longitudinal direction D 2 of fin F. Fourth protruding portion MP 4 continuously extends from one end to the other end of fin F in longitudinal direction D 2 . Fourth protruding portion MP 4 is located on the windward side relative to first protruding portion MP 1 and second protruding portion MP 2 in air flow direction D 0 . Fourth protruding portion MP 4 is spaced apart from first protruding portion MP 1 and second protruding portion MP 2 in widthwise direction D 1 of fin F. Fourth protruding portion MP 4 is located on a leeward end of fin F in widthwise direction D 1 .
  • Fourth protruding portion MP 4 protrudes from planar portion SP less than third protruding portion MP 3 . Fourth protruding portion MP 4 extends parallel to third protruding portion MP 3 . Third protruding portion MP 3 and fourth protruding portion MP 4 are located to sandwich first protruding portion MP 1 and second protruding portion MP 2 .
  • Fourth protruding portion MP 4 protrudes from planar portion SP less than second protruding portion MP 2 .
  • Second protruding portion MP 2 protrudes from planar portion SP less than third protruding portion MP 3 .
  • fourth protruding portion MP 4 extends linearly in longitudinal direction D 2 of fin F.
  • the strength of fin F can be improved in longitudinal direction D 2 of fin F by fourth protruding portion MP 4 .
  • fourth protruding portion MP 4 is located on the windward side relative to first protruding portion MP 1 and second protruding portion MP 2 in air flow direction D 0 . Furthermore, fourth protruding portion MP 4 protrudes from planar portion SP less than third protruding portion MP 3 . Therefore, the formation of frost on fin F can be suppressed on the leeward side.
  • fourth protruding portion MP 4 protrudes from planar portion SP less than second protruding portion MP 2
  • second protruding portion MP 2 protrudes from planar portion SP less than third protruding portion MP 3 . Therefore, the formation of frost on fin F can be suppressed on the leeward side.
  • heat exchanger HE and refrigeration cycle apparatus 100 according to a third embodiment have the same configuration, operation, and function and effect as those of heat exchanger HE and refrigeration cycle apparatus 100 according to the second embodiment.
  • fin F of heat exchanger HE The structure of fin F of heat exchanger HE according to the third embodiment will be described with reference to FIGS. 9 to 11 .
  • Fourth protruding portions MP 4 extend linearly in longitudinal direction D 2 of fin F. Fourth protruding portions MP 4 are spaced apart from each other in longitudinal direction D 2 of fin F. Fourth protruding portions MP 4 are separated from each other in longitudinal direction D 2 of fin F. Fourth protruding portions MP 4 are intermittently located in longitudinal direction D 2 of fin F, between first protruding portions MP 1 facing each other.
  • Fourth protruding portion MP 4 is located to be displaced from first protruding portion MP 1 and second protruding portion MP 2 in widthwise direction D 1 of fin F. Fourth protruding portion MP 4 is located so as not to overlap first protruding portion MP 1 and second protruding portion MP 2 in widthwise direction D 1 of fin F.
  • fourth protruding portion MP 4 is located to be displaced from first protruding portion MP 1 and second protruding portion MP 2 in widthwise direction D 1 of fin F.
  • the strength of fin F can be improved as fourth protruding portion MP 4 is located at a location on which a stress tends to concentrate, where no first protruding portion MP 1 and second protruding portion MP 2 are formed.
  • first protruding portion MP 1 is not affected by the dead water region in the wake of fourth protruding portion MP 4 . Therefore, the heat transfer coefficient of fin F can be improved.
  • heat exchanger HE and refrigeration cycle apparatus 100 according to a fourth embodiment have the same configuration, operation, and function and effect as those of heat exchanger HE and refrigeration cycle apparatus 100 according to the second embodiment.
  • fin F of heat exchanger HE The structure of fin F of heat exchanger HE according to the fourth embodiment will be described with reference to FIGS. 12 to 14 .
  • First protruding portion MP 1 is longer on its leeward side than on its windward side with respect to the center of through hole TH in widthwise direction D 1 of fin F.
  • First protruding portion MP 1 has a larger area on the leeward side than on the windward side with respect to the center of through hole TH in widthwise direction D 1 of fin F.
  • first protruding portion MP 1 is longer on its leeward side than on its windward side with respect to the center of through hole TH in widthwise direction D 1 of fin F. As a result, the formation of frost on the windward side of first protruding portion MP 1 can be suppressed.

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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)
US18/247,090 2020-11-27 2020-11-27 Heat Exchanger and Refrigeration Cycle Apparatus Pending US20230366639A1 (en)

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US (1) US20230366639A1 (ja)
EP (1) EP4253894A4 (ja)
JP (1) JPWO2022113297A1 (ja)
CN (1) CN116547490A (ja)
WO (1) WO2022113297A1 (ja)

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JPS5730591U (ja) * 1980-07-25 1982-02-17
JPS5730589U (ja) * 1980-07-25 1982-02-17
JPS61235693A (ja) * 1985-04-10 1986-10-20 Matsushita Electric Ind Co Ltd フインチユ−ブ型熱交換器
KR100518854B1 (ko) 2003-09-02 2005-09-30 엘지전자 주식회사 열교환기
JP6337742B2 (ja) * 2014-11-04 2018-06-06 パナソニックＩｐマネジメント株式会社 フィンチューブ熱交換器
JP2019163909A (ja) * 2018-03-20 2019-09-26 東京電力ホールディングス株式会社 フィンチューブ式熱交換器
CN110726325A (zh) * 2019-11-19 2020-01-24 广东美的暖通设备有限公司 用于管翅式换热器的翅片、管翅式换热器及空调器

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EP4253894A1 (en) 2023-10-04
EP4253894A4 (en) 2023-12-27
CN116547490A (zh) 2023-08-04
JPWO2022113297A1 (ja) 2022-06-02

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