EP3845851B1 - Heat exchanger, heat exchanger unit, and refrigeration cycle device - Google Patents
Heat exchanger, heat exchanger unit, and refrigeration cycle device Download PDFInfo
- Publication number
- EP3845851B1 EP3845851B1 EP18932105.2A EP18932105A EP3845851B1 EP 3845851 B1 EP3845851 B1 EP 3845851B1 EP 18932105 A EP18932105 A EP 18932105A EP 3845851 B1 EP3845851 B1 EP 3845851B1
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- EP
- European Patent Office
- Prior art keywords
- flat
- heat
- exchanger
- tube
- fin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005057 refrigeration Methods 0.000 title description 2
- 239000003507 refrigerant Substances 0.000 description 15
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 238000005219 brazing Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000203 mixture 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
- F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
- F28D1/0435—Combination of units extending one behind the other
-
- 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
- F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
-
- 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
- F28F1/14—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
- F28F1/22—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 having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
-
- 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
- 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
- F28F2215/00—Fins
- F28F2215/02—Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/10—Secondary fins, e.g. projections or recesses on main fins
Definitions
- plural flat-tube groups each including plural flat tubes are connected by a fin.
- This configuration makes it possible to improve the pressure resistance of the tubes through which refrigerant is passed, and reduce the thickness of the fin to thereby also reduce the weight of the fin.
- a heat-exchanger, a heat-exchanger unit, and a refrigeration-cycle apparatus that have improved heat-exchange performance and are also easy to manufacture can be provided.
- Embodiment 1 air flows into the heat-exchanger 100 in the x-direction. Because of the inclined placement of the first portion 31 of the fin 30 as described above, air flows in a meandering manner in the gap between the first flat tube 20a, the second flat tube 20b, and the fin 30. This results in increased heat-transfer area and consequently improved heat-transfer performance of the heat-exchanger 100. As the airflow is deflected at the first portion 31 of the fin 30, incoming air collides with a side wall 23b of the second flat tube 20b. The collision of air causes disturbances in the flow of air between the second flat tubes 20b.
Landscapes
- 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)
Description
- The present disclosure relates to a heat-exchanger, a heat-exchanger unit including a heat-exchanger, and a refrigeration-cycle apparatus. More specifically, the present disclosure relates to the structure of fins attached to flat tubes.
- In some multi-tube heat-exchanger designed to improve the heat-exchange performance, two plates are bonded together, tubular body parts with a small diameter are arranged in a staggered manner, and the tubular body parts are connected to each other by heat transfer fins (see, for example, Patent Literature 1).
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WO 02/16834 A2 claim 1, provides a finless and seamless heat exchanger having a plurality of tubes forming a serpentine flow path. -
- Patent Literature 1:
Japanese Unexamined Patent Application Publication No. 2006-084078 - Patent Literature 2:
PCT application Publication No. WO 02/16834 A2 - In the heat-exchanger disclosed in
Patent Literature 1, each tubular body part is formed by bonding two plates together. A problem with this configuration is that, to ensure the pressure resistance of the tubular body parts, the heat transfer fins need to be made thicker as well, leading to increased weight. Another problem with the above-mentioned configuration is that the brazing filler metal used to bond and join the two plates together penetrates into a refrigerant passage in the tubular body parts. - The present disclosure has been made to address the above-mentioned problems, and accordingly it is an object of the present disclosure to provide a heat-exchanger, a heat-exchanger unit, and a refrigeration-cycle apparatus that allow for improved pressure resistance of tubes through which refrigerant passes, reduced weight of heat transfer fins, and easy manufacture.
- A heat-exchanger according to the present invention is provided as set forth in
claim 1. - A heat-exchanger unit according to an embodiment of the present disclosure includes the heat-exchanger described above.
- A refrigeration-cycle apparatus according to an embodiment of the present disclosure includes the heat-exchanger unit described above.
- According to an embodiment of the present disclosure, plural flat-tube groups each including plural flat tubes are connected by a fin. This configuration makes it possible to improve the pressure resistance of the tubes through which refrigerant is passed, and reduce the thickness of the fin to thereby also reduce the weight of the fin. Furthermore, a heat-exchanger, a heat-exchanger unit, and a refrigeration-cycle apparatus that have improved heat-exchange performance and are also easy to manufacture can be provided.
-
- [
Fig. 1] Fig. 1 is a front view of a heat-exchanger according toEmbodiment 1. - [
Fig. 2] Fig. 2 is a side view of the heat-exchanger according toEmbodiment 1. - [
Fig. 3] Fig. 3 illustrates a refrigeration-cycle apparatus employing the heat-exchanger according toEmbodiment 1. - [
Fig. 4] Fig. 4 illustrates a sectional structure of the heat-exchanger illustrated inFig. 2 . - [
Fig. 5] Fig. 5 is a side view of a heat-exchanger representing a modification of the heat-exchanger according toEmbodiment 1. - [
Fig. 6] Fig. 6 illustrates a sectional structure of the heat-exchanger representing a modification of the heat-exchanger according toEmbodiment 1. - [
Fig. 7] Fig. 7 is an enlarged view of a slit as seen in the x-direction. - [
Fig. 8] Fig. 8 illustrates a sectional structure of a heat-exchanger representing a modification of the heat-exchanger according toEmbodiment 1. - An embodiment of a heat-exchanger, and an embodiment of a heat-exchanger unit will be described below. It is to be understood that the drawings are only illustrative of one example, and not intended to limit the present disclosure. Elements designated by the same reference signs in the drawings represent the same or corresponding elements throughout the specification. Further, in the drawings below, the relative sizes of various components may differ from the actual relative sizes.
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Fig. 1 is a front view of a heat-exchanger 100 according toEmbodiment 1.Fig. 2 is a side view of the heat-exchanger 100 according toEmbodiment 1.Fig. 3 illustrates a refrigeration-cycle apparatus 1 employing the heat-exchanger 100 according toEmbodiment 1. The heat-exchanger 100 illustrated inFigs. 1 and2 is incorporated in the refrigeration-cycle apparatus 1 such as an air-conditioning apparatus and a refrigerator. As illustrated inFig. 3 , the refrigeration-cycle apparatus 1 includes acompressor 3, a four-way valve 4, an outdoor heat-exchanger 5, anexpansion device 6, and an indoor heat-exchanger 7, which are connected by arefrigerant pipe 90 to form a refrigerant circuit. If, for instance, the refrigeration-cycle apparatus 1 is an air-conditioning apparatus, refrigerant flows in therefrigerant pipe 90, and the four-way valve 4 switches the flows of refrigerant to switch the refrigeration-cycle apparatus 1 to a heating operation, a refrigeration operation, or a defrost operation. - The outdoor heat-
exchanger 5 incorporated in anoutdoor unit 8 is provided with afan 2 disposed close to the outdoor heat-exchanger 5, and the indoor heat-exchanger 7 incorporated in anindoor unit 9 is provided with anotherfan 2 disposed close to the indoor heat-exchanger 7. In theoutdoor unit 8, thefan 2 sends outside air to the outdoor heat-exchanger 5 for heat exchange between the outside air and refrigerant. In theindoor unit 9, thefan 2 sends indoor air to the indoor heat-exchanger 7 for heat exchange between the indoor air and refrigerant to thereby condition the temperature of the indoor air. The heat-exchanger 100 can be used in the refrigeration-cycle apparatus 1 as the outdoor heat-exchanger 5 incorporated in theoutdoor unit 8, and as the indoor heat-exchanger 7 incorporated in theindoor unit 9. The heat-exchanger 100 is used as a condenser or an evaporator. Units in which the heat-exchanger 100 is incorporated, such as theoutdoor unit 8 and theindoor unit 9, will be specifically referred to as heat-exchanger units. - The heat-
exchanger 100 illustrated inFig. 1 includes two flat-tube groups 10. Of the two flat-tube groups 10, one will be referred to as first flat-tube group 10a, and the other will be referred to as second flat-tube group 10b. In the following description, the flat-tube groups tube group 10a and the second flat-tube group 10b are arranged in the x-direction. The flat-tube group 10 includes plural flat tubes 20. The flat tubes 20 are represented asflat tubes Figs. 1 and2 . The flat tubes 20 in each flat-tube group 10 are disposed in the y-direction with their pipe axes arranged in parallel to each other. InEmbodiment 1, the pipe axes of the flat tubes 20 are oriented in the z-direction. InEmbodiment 1, the reverse z-direction coincides with the direction of gravity. Alternatively, however, the heat-exchanger 100 may be disposed with the z-axis inclined from the direction of gravity. Each of theflat tubes 20a of the first flat-tube group 10a is connected to a lower-end header 50a at a lower end in the direction of the pipe axis, and connected to an upper-end header 51a at an upper end in the direction of the pipe axis. Likewise, each of theflat tubes 20b of the second flat-tube group 10b is connected to a lower-end header 50b at a lower end in the direction of the pipe axis, and connected to an upper-end header 51b at an upper end in the direction of the pipe axis. Although the heat-exchanger 100 includes two flat-tube groups Embodiment 1, the heat-exchanger 100 may include more than two flat-tube groups 10. -
Fig. 4 illustrates a sectional structure of the heat-exchanger 100 illustrated inFig. 2 .Fig. 4 represents a section perpendicular to the pipe axes of the flat tubes 20 included in each of the flat-tube groups 10, and illustrates the structure of a section corresponding to a section along A-A ofFig. 2 .Fig. 4 shows some of the flat tubes 20 constituting each flat-tube group 10. Theflat tubes 20a of the first flat-tube group 10a, and theflat tubes 20b of the second flat-tube group 10b are arranged in such a manner that, in a section perpendicular to the pipe axes of theflat tubes flat tubes 20a of the first flat-tube group 10a, and theflat tubes 20b of the second flat-tube group 10b are arranged in a staggered manner. That is, the secondflat tube 20b included in the second flat-tube group 10b is disposed at a location offset in the y-direction from an extension of the longitudinal axis of the firstflat tube 20a included in the first flat-tube group 10a, and when theflat tubes flat tube 20b lies on an extension of the gap between two firstflat tubes 20a that are adjacent to each other. The firstflat tube 20a and the secondflat tube 20b will be sometimes collectively referred to as flat tube 20 hereinafter. - As illustrated in
Fig. 4 , afin 30 is provided to the firstflat tube 20a of the first flat-tube group 10a, and to the secondflat tube 20b of the second flat-tube group 10b. Thefin 30 is formed by bending a single plate-like part. Thefin 30 is disposed in such a manner that a plate face of thefin 30 is positioned along the firstflat tube 20a and the other plate face of thefin 30 is positioned along the secondflat tube 20b. InEmbodiment 1, the pipe axis of the firstflat tube 20a and the pipe axis of the secondflat tube 20b coincide with the direction of gravity, and thus thefin 30 is disposed with its plate faces extending in the direction of gravity. The above-mentioned configuration of the heat-exchanger 100 ensures that condensed water that forms on thefin 30 because of condensation when the heat-exchanger 100 is used as an evaporator, or melted water resulting from defrost operation performed when frost forms, can be smoothly discharged from thefin 30. This makes it possible to maintain high heat-exchange performance of the heat-exchanger 100. - The
fin 30 includes afirst portion 31, asecond portion 32, athird portion 33, afourth portion 34, and afifth portion 35. Thefirst portion 31 is disposed between the firstflat tube 20a and the secondflat tube 20b. Thesecond portion 32 is joined to the firstflat tube 20a. Thethird portion 33 is joined to the secondflat tube 20b. Thefourth portion 34 is extended in the reverse x-direction from anend 21a of the firstflat tube 20a. Thefifth portion 35 is extended in the x-direction from anend 22b of the secondflat tube 20b. - The
fin 30 and the firstflat tube 20a are in contact with each other at thesecond portion 32, and joined together by brazing or other methods. Thesecond portion 32 is formed by bending the plate-like part into the shape of a recess that conforms to the shape of a side surface of the firstflat tube 20a. The firstflat tube 20a fits in the recess. Thefin 30 and the secondflat tube 20b are in contact with each other at thethird portion 33, and joined together by brazing or other methods. Thethird portion 33 is also formed by bending the plate-like part into the shape of a recess that conforms to the shape of a side surface of the secondflat tube 20b. The secondflat tube 20b fits in the recess. The recess provided at thesecond portion 32 of thefin 30, and the recess provided at thethird portion 33 of thefin 30 are oriented in different directions. The recess provided at thesecond portion 32 opens in the y-direction, and the recess provided at thethird portion 33 opens in the reverse y-direction. That is, the firstflat tube 20a is attached to aplate face 38, which is one plate face of thefin 30 oriented in the y-direction, and the secondflat tube 20b is attached to aplate face 39, which is the other plate face of thefin 30 oriented in the reverse y-direction. - As illustrated in
Fig. 4 , the firstflat tube 20a and the secondflat tube 20b each fit in a recess provided at asingle fin 30. This arrangement allows thefin 30, the firstflat tube 20a, and the secondflat tube 20b to be handled as an integral component at the time of manufacture. That is, prior to joining the two flat tubes 20 to the lower-end headers end headers single fin 30 to integrate the flat tubes 20 with thefin 30. This makes it possible to easily determine relative positions of the two flat tubes 20 prior to the joining process, thus improving the ease of assembly. - The
fin 30 includes thefirst portion 31 located between the first flat-tube group 10a and the second flat-tube group 10b. Thefirst portion 31 is positioned to connect an end of the recess in which the firstflat tube 20a fits and an end of the recess in which the secondflat tube 20b fits. In other words, thefirst portion 31 is positioned to connect anend 22a and anend 21b. Theend 22a is an end of the firstflat tube 20a located closer to the second flat-tube group 10b than is the other end of the firstflat tube 20a, and theend 21b is an end of the secondflat tube 20b located closer to the first flat-tube group 10a than is the other end of the secondflat tube 20b. InEmbodiment 1, thefirst portion 31 is placed with an inclination with respect to the longitudinal axes of the first and secondflat tubes - As illustrated in
Fig. 4 , inEmbodiment 1, air flows into the heat-exchanger 100 in the x-direction. Because of the inclined placement of thefirst portion 31 of thefin 30 as described above, air flows in a meandering manner in the gap between the firstflat tube 20a, the secondflat tube 20b, and thefin 30. This results in increased heat-transfer area and consequently improved heat-transfer performance of the heat-exchanger 100. As the airflow is deflected at thefirst portion 31 of thefin 30, incoming air collides with aside wall 23b of the secondflat tube 20b. The collision of air causes disturbances in the flow of air between the secondflat tubes 20b. This facilitates to equalize the temperatures of air coming into contact with various parts of the secondflat tubes 20b, thus making the quality of refrigerant flowing in each secondflat tube 20b uniform. As a result, the heat-exchanger 100 improves in heat-exchange performance. - The
fin 30 includes thefourth portion 34 in the shape of a flat plate extended from theend 21a, which is an end of the firstflat tube 20a oriented in the reverse x-direction. That is, thefourth portion 34 is extended from theend 21a, which is an end of the firstflat tube 20a opposite to theend 22a from which thefirst portion 31 is extended. Further, thefin 30 includes thefifth portion 35 in the shape of a flat plate extended from theend 22b, which is an end of the secondflat tube 20b oriented in the x-direction. That is, thefifth portion 35 is extended from theend 22b, which is an end of the secondflat tube 20b opposite to theend 21b from which thefirst portion 31 is extended. Because of the presence of the fourth andfifth portions fin 30, the heat-exchanger 100 has increased heat-transfer area and improved heat-transfer performance. -
Fig. 5 is a side view of a heat-exchanger 100a representing a modification of the heat-exchanger 100 according toEmbodiment 1.Fig. 6 illustrates a sectional structure of the heat-exchanger 100a representing a modification of the heat-exchanger 100 according toEmbodiment 1.Fig. 7 is an enlarged view of aslit 41 as seen in the x-direction.Fig. 6 illustrates the structure of a section corresponding to a section taken along B-B ofFig. 5 . The heat-exchanger 100a has theslits 41 provided in thefourth portion 34, which is the most windward portion of thefin 30 and extended from theend 21a of the firstflat tube 20a. Theslits 41 are each formed by cutting and raising a part of thefourth portion 34 in a direction perpendicular to the plate face. As illustrated inFig. 7 , thefourth portion 34, which has a plate-like shape, includes aparallel portion 45 and a risingportion 44. Theparallel portion 45 is formed by cutting and raising a part of thefourth portion 34, and positioned substantially in parallel to thefourth portion 34. The risingportion 44 is a part of thefourth portion 34 that connects both ends of theparallel portion 45 to the plate face of thefourth portion 34. Providing theparallel portion 45 in parallel to the plate face of thefourth portion 34 of thefin 30 helps to reduce the boundary layer of air flowing in parallel to the surface of thefourth portion 34. This makes it possible to improve heat-transfer performance while reducing an increase in the resistance to airflow. - The heat-
exchanger 100a also includes theslits 41 provided in thefifth portion 35, which is the most leeward portion of thefin 30 and extended from theend 21b of the secondflat tube 20b. Theslits 41 provided in thefifth portion 35 are similar in structure to theslits 41 provided in thefourth portion 34. This helps to reduce the boundary layer of air flowing in parallel to the surface of thefifth portion 35, thus making it possible to improve heat-transfer performance while reducing an increase in the resistance to airflow. - Further, the heat-
exchanger 100a haslouvers 40 provided in thefirst portion 31 located between the firstflat tube 20a and the secondflat tube 20b. Thelouvers 40 each are a tongue-shaped part that is formed by cutting and raising a part of thefirst portion 31 having a plate-like shape, and is extended in the x-direction in parallel to the longitudinal axes of the first and secondflat tubes louver 40 has, at its proximal portion, an opening that extends through the plate of thefirst portion 31. Thelouver 40 is extended in parallel to the flow of air passing between the firstflat tubes 20a. Thus, air passes through a hole provided in a part of the plate of thefirst portion 31 where thelouver 40 is provided. As a result, a flow of air parallel to the longitudinal axis of the flat tube 20 can be created also at a location where thefirst portion 31 inclined from the firstflat tube 20a is provided. Therefore, the presence of thelouver 40 makes it possible to improve heat-transfer performance while reducing an increase in the resistance to airflow through the heat-exchanger 100a. - The heat-
exchanger fins 30, the first flat-tube group 10a, and the second flat-tube group 10b are combined with each other. Each flat tube 20 is fit into the corresponding recess provided at thefin 30. With the firstflat tube 20a, the secondflat tube 20b, and thefin 30 integrated together, an end in the direction of the pipe axis of each of the first and secondflat tubes end header end header fin 30 is pulled from thefourth portion 34 and thefifth portion 35, which are located at opposite ends in the x-direction illustrated inFigs. 4 and6 . Thus, thesecond portion 32 of thefin 30 is pressed against the firstflat tube 20a, and thethird portion 33 of thefin 30 is pressed against the secondflat tube 20b. This ensures more secure contact between thefin 30 and the flat tubes 20, thus improving the accuracy of mounting of thefin 30 to the flat tubes 20. With this state maintained, a set of theflat tubes 20a and a set of theflat tubes 20b are respectively inserted into the lower-end header 50a and the lower-end header 50b and into the upper-end header 51a and the upper-end header 51b. Then, brazing filler metal is placed at the joints between theflat tubes end headers flat tubes end headers flat tubes fin 30, and then the resulting assembly is put into a furnace for brazing. With the heat-exchanger fins 30 allows the first flat-tube group 10a and the second flat-tube group 10b to be handled integrally, thus allowing for easy assembly and easy manufacture. - In
Embodiment 1, the firstflat tube 20a and the secondflat tube 20b are arranged in a staggered manner with their longitudinal axes arranged in parallel to each other, and thus thefirst portion 31 is positioned with an inclination from both the firstflat tube 20a and the secondflat tube 20b. However, this arrangement is not intended to be limiting. Although the heat-exchanger 100a including both thelouvers 40 and theslits 41 has been described above as a modification of the heat-exchanger 100 according toEmbodiment 1, a heat-exchanger including only one of thelouvers 40 and theslits 41 may be used as a modification of the heat-exchanger 100. -
Fig. 8 illustrates a sectional structure of a heat-exchanger 100b representing a modification of the heat-exchanger 100 according toEmbodiment 1.Fig. 8 illustrates the structure of a section corresponding to a section taken along A-A ofFig. 2 . In the heat-exchanger 100b according to the modification, thefirst portion 31 of thefin 30, thesecond portion 32 into which the firstflat tube 20a fits, and thethird portion 33 into which the secondflat tube 20b fits are parallel to each other. Thefourth portion 34, which is the most windward portion of thefin 30, and thefifth portion 35, which is the most leeward portion of thefin 30, are inclined with respect to thefirst portion 31, thesecond portion 32 into which the firstflat tube 20a fits, and thethird portion 33 into which the secondflat tube 20b fits. Consequently, as air flows into the heat-exchanger 100 in the x-direction, the air collides with aside wall 23a of the firstflat tube 20a. The collision of air causes disturbances in the flow of air between the firstflat tubes 20a. This facilitates to equalize the temperatures of air coming into contact with various parts of the firstflat tube 20a, thus making the quality of refrigerant flowing in each firstflat tube 20a uniform. As a result, the heat-exchanger 100b improves in heat-exchange performance. - The heat-
exchanger Embodiment 1 can be used as at least one of the outdoor heat-exchanger 5 and the indoor heat-exchanger 7 of the refrigeration-cycle apparatus 1 illustrated inFig. 3 to thereby provide the refrigeration-cycle apparatus 1 with enhanced energy efficiency. In this regard, energy efficiency is defined as follows: "heating energy efficiency = indoor heat-exchanger (condenser) capacity/total input"; and "cooling energy efficiency = indoor heat-exchanger (evaporator) capacity/total input". - For the heat-
exchanger cycle apparatus 1 employing the heat-exchanger unit that have been described above with reference toEmbodiment 1, the effects of the heat-exchanger cycle apparatus 1 can be accomplished when a refrigerant such as R410A, R32, and HFO1234yf is used. Further, although the foregoing description ofEmbodiment 1 is directed to using air and refrigerant as exemplary working fluids, the same effects as mentioned above can be attained also by using other kinds of gas, liquid, or gas-liquid mixture fluids. - The respective structures of the heat-
exchangers Embodiment 1 can be combined with each other as appropriate. For example, one or both of thelouvers 40 and theslits 41 of the heat-exchanger 100a may be used in the heat-exchanger 100b. - 1 refrigeration-
cycle apparatus 2fan 3 compressor 4 four-way valve 5 outdoor heat-exchanger 6 expansion device 7 indoor heat-exchanger 8outdoor unit 9 indoor unit 10 flat-tube group 10a (first) flat-tube group 10b (second) flat-tube group 20flat tube 20a (first)flat tube 20b (second)flat 21b endtube 21a end22a end 22b end23a side wall 23b side wall 30fin 31first portion 32second portion 33third portion 34fourth portion 35fifth portion 38plate face 39plate face 40louver 41 slit 44 risingportion 45 parallel portion 50 lower-end header 50a lower-end header 50b lower-end header 51 upper-end header 51a upper-end header 51b upper-end header 90refrigerant pipe 100 heat-exchanger 100a heat-exchanger 100b heat-exchanger
Claims (8)
- A heat-exchanger (100), comprising:a first flat-tube group (10a) including a plurality of flat tubes (20) each having a pipe axis, the plurality of flat tubes (20) included in the first flat-tube group (10a) being arranged in such a manner that the pipe axes of the plurality of flat tubes (20) included in the first flat-tube group (10a) are arranged in parallel to each other, one of the plurality of flat tubes (20) included in the first flat-tube group (10a) being a first flat tube (20a);a second flat-tube group (10b) provided adjacent to the first flat-tube group (10a), the second flat-tube group (10b) including a plurality of flat tubes (20) each having a pipe axis, the plurality of flat tubes (20) included in the second flat-tube group (10b) being arranged in such a manner that the pipe axes of the plurality of flat tubes (20) included in the second flat-tube group (10b) are arranged in parallel to each other, one of the plurality of flat tubes (20) included in the second flat-tube group (10b) being a second flat tube (20b);a fin (30) provided to the first flat-tube group (10a) and the second flat-tube group (10b),the fin (30) includinga first portion (31) connecting an end (22a) of a longitudinal axis of the first flat tube (20a) in a section perpendicular to the pipe axis of the first flat tube (20a) and an end (21b) of a longitudinal axis of the second flat tube (20b) in a section perpendicular to the pipe axis of the second flat tube (20b), characterized in that the fin includesa second portion (32) joined to a side wall of the first flat tube (20a), anda third portion (33) joined to a side wall of the second flat tube (20b),at the second portion (32), one face of a plate of the fin (30) being joined to the first flat tube (20a),at the third portion (33), an other face of the plate being joined to the second flat tube (20b).
- The heat-exchanger of claim 1, wherein the plurality of flat tubes of the first flat-tube group and the plurality of flat tubes of the second flat-tube group are arranged in a staggered manner.
- The heat-exchanger of claim 1 or 2, wherein the first portion of the fin located between the first flat-tube group and the second flat-tube group, which are provided adjacent to each other, is inclined with respect to the longitudinal axes of the plurality of flat tubes.
- The heat-exchanger of claim 3,wherein the first portion includesa louver extended from the plate in a direction transverse to the pipe axis, andan opening provided in the plate at a proximal portion of the louver, the opening extending through the plate.
- The heat-exchanger of claim 4, wherein the louver is parallel to the longitudinal axes of the plurality of flat tubes.
- The heat-exchanger of any one of claims 1 to 5,wherein the fin includesa fourth portion extended from an end of the longitudinal axis of the first flat tube opposite to the end from which the first portion is extended, anda fifth portion extended from an end of the longitudinal axis of the second flat tube opposite to the end from which the first portion is extended, andwherein at least one of the fourth portion and the fifth portion includes a slit provided in the plate.
- A heat-exchanger unit, comprising the heat-exchanger of any of claims 1 to 6.
- A refrigeration-cycle apparatus, comprising the heat-exchanger unit of claim 7.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2018/031502 WO2020044391A1 (en) | 2018-08-27 | 2018-08-27 | Heat exchanger, heat exchanger unit, and refrigeration cycle device |
Publications (3)
Publication Number | Publication Date |
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EP3845851A1 EP3845851A1 (en) | 2021-07-07 |
EP3845851A4 EP3845851A4 (en) | 2021-09-01 |
EP3845851B1 true EP3845851B1 (en) | 2023-03-01 |
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ID=69643578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18932105.2A Active EP3845851B1 (en) | 2018-08-27 | 2018-08-27 | Heat exchanger, heat exchanger unit, and refrigeration cycle device |
Country Status (4)
Country | Link |
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EP (1) | EP3845851B1 (en) |
JP (1) | JP6980117B2 (en) |
CN (1) | CN112567192A (en) |
WO (1) | WO2020044391A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2022085067A1 (en) * | 2020-10-20 | 2022-04-28 | 三菱電機株式会社 | Heat exchanger and refrigeration cycle device |
CN112277570B (en) * | 2020-10-30 | 2022-05-20 | 安徽江淮汽车集团股份有限公司 | Warm braw core and vehicle air conditioner |
CN118339417A (en) * | 2021-12-06 | 2024-07-12 | 三菱电机株式会社 | Heat exchanger |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1124526B (en) * | 1959-04-16 | 1962-03-01 | Licentia Gmbh | Coiled tube heat exchanger with heat conducting plates arranged between the tubes, in particular condensers for refrigeration machines |
DE1927605A1 (en) * | 1969-05-30 | 1970-12-03 | Hans Henting | Weather cooler for mining, especially face cooler |
DE2154366A1 (en) * | 1971-11-02 | 1973-05-10 | Folle Willi | AIR INLET BLINDS |
HU184377B (en) * | 1981-02-05 | 1984-08-28 | Huetoegepgyar | Motor cooler |
JP2517872Y2 (en) * | 1989-12-29 | 1996-11-20 | 昭和アルミニウム株式会社 | Heat exchanger |
JPH07305986A (en) * | 1994-05-16 | 1995-11-21 | Sanden Corp | Multitubular type heat exchanger |
JP2000088297A (en) * | 1998-09-17 | 2000-03-31 | Hitachi Ltd | Ice heat storage type air-conditioning device and ice heat storage tank |
AU2001286552A1 (en) * | 2000-08-21 | 2002-03-04 | Engineered Dynamics Corporation | Heat exchanger assembly and a method for efficiently transferring heat |
JP4540839B2 (en) * | 2000-12-13 | 2010-09-08 | 株式会社日本クライメイトシステムズ | Combined heat exchanger |
JP2004251554A (en) * | 2003-02-20 | 2004-09-09 | Matsushita Electric Ind Co Ltd | Exterior heat exchanger for heat pump |
JP2006084078A (en) | 2004-09-15 | 2006-03-30 | Daikin Ind Ltd | Thin heat transfer tube unit of thin multitubular heat exchanger |
JP2006162141A (en) * | 2004-12-06 | 2006-06-22 | Matsushita Electric Ind Co Ltd | Heat exchanger |
JP4338667B2 (en) * | 2005-04-01 | 2009-10-07 | カルソニックカンセイ株式会社 | Heat exchanger |
CN103477177B (en) * | 2011-04-14 | 2016-11-16 | 开利公司 | Heat exchanger |
CN107218822B (en) * | 2016-03-21 | 2019-04-19 | 丹佛斯微通道换热器(嘉兴)有限公司 | Heat exchanger and air-conditioning system |
AT518986B1 (en) * | 2016-10-07 | 2018-03-15 | Dipl Ing Thomas Euler Rolle | heat exchangers |
WO2018185824A1 (en) * | 2017-04-04 | 2018-10-11 | 三菱電機株式会社 | Heat exchanger and refrigeration cycle device |
JP7044786B2 (en) * | 2017-08-03 | 2022-03-30 | 三菱電機株式会社 | Heat exchanger and refrigeration cycle equipment |
WO2019026239A1 (en) * | 2017-08-03 | 2019-02-07 | 三菱電機株式会社 | Heat exchanger and refrigeration cycle device |
CN208238599U (en) * | 2018-05-18 | 2018-12-14 | 广东美的制冷设备有限公司 | Heat exchanger and heat exchange equipment |
-
2018
- 2018-08-27 CN CN201880095774.3A patent/CN112567192A/en active Pending
- 2018-08-27 EP EP18932105.2A patent/EP3845851B1/en active Active
- 2018-08-27 WO PCT/JP2018/031502 patent/WO2020044391A1/en unknown
- 2018-08-27 JP JP2020539169A patent/JP6980117B2/en active Active
Also Published As
Publication number | Publication date |
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JPWO2020044391A1 (en) | 2021-05-13 |
JP6980117B2 (en) | 2021-12-15 |
CN112567192A (en) | 2021-03-26 |
WO2020044391A1 (en) | 2020-03-05 |
EP3845851A4 (en) | 2021-09-01 |
EP3845851A1 (en) | 2021-07-07 |
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