US20190033016A1 - Heat Exchanger - Google Patents

Heat Exchanger Download PDF

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Publication number
US20190033016A1
US20190033016A1 US16/069,550 US201616069550A US2019033016A1 US 20190033016 A1 US20190033016 A1 US 20190033016A1 US 201616069550 A US201616069550 A US 201616069550A US 2019033016 A1 US2019033016 A1 US 2019033016A1
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United States
Prior art keywords
flow passage
flow
flow passages
core
header
Prior art date
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Abandoned
Application number
US16/069,550
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English (en)
Inventor
Taku AOKI
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Sumitomo Precision Products Co Ltd
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Sumitomo Precision Products Co Ltd
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Assigned to SUMITOMO PRECISION PRODUCTS CO., LTD. reassignment SUMITOMO PRECISION PRODUCTS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AOKI, TAKU
Publication of US20190033016A1 publication Critical patent/US20190033016A1/en
Abandoned 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/12—Cooling of plants
    • F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0025—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
    • F28D7/0033—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes the conduits for one medium or the conduits for both media being bent
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/0056—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • F28F9/0268—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box in the form of multiple deflectors for channeling the heat exchange medium
    • 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
    • F28D2021/0021—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for aircrafts or cosmonautics
    • 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
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0087—Fuel coolers
    • 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
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0089—Oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/0287—Other particular headers or end plates having passages for 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/029—Other particular headers or end plates with increasing or decreasing cross-section, e.g. having conical shape

Definitions

  • the present invention relates to a heat exchanger, and particularly to a heat exchanger including a header which serves as an entrance or an exit of a fluid.
  • a heat exchanger including a header, which serves as an entrance or an exit of fluids is known in the related art.
  • a heat exchanger is disclosed in, for example, JP-UM-A-62-160173.
  • a plate-fin heat exchanger including a core, in which a plurality of first flow passages and a plurality of second flow passages are alternately stacked to exchange heat between two types of fluids, and a header, which serves as an entrance or an exit of the fluids, is disclosed.
  • the core is formed in a shape in which a corner of a rectangular parallelepiped is obliquely cut off, and a hollow triangular prismatic header is formed in a triangular prismatic region corresponding to a cut off portion.
  • the core has a uniform flow passage sectional shape as a whole.
  • the header has a cylindrical port that connects the inside of the header to the outside and a hollow triangular prismatic tank.
  • the plurality of first flow passages and the plurality of second flow passages each branch off toward two end surfaces of the core, which are obliquely inclined in opposite directions to each other, and each are open to another tank from each of the end surfaces to the inside.
  • the fluids are distributed to respective openings of the plurality of first flow passages or the second flow passages via the tanks of the respective ports.
  • a plurality of openings of the first (second) flow passage units each have a horizontally-long rectangular shape when a flow passage section orthogonal to a flow direction of a fluid is seen.
  • the tank has a section formed as a vertically long rectangular single flow passage covering a plurality of openings of the stacked first (second) flow passage units.
  • the flow passage sectional area of the tank is significantly large compared to the total area (total sectional area) of the openings of the first flow passages (second flow passages).
  • the flow passage sectional shape significantly changes along the flow of a fluid at a boundary portion between the core and the tank when the fluid passes through the header.
  • a problem that a pressure loss of a fluid when the fluid flows into the heat exchanger and flows out from the heat exchanger via the header becomes greater is caused by a significant change in the flow passage sectional shape.
  • the invention is devised to solve such a problem described above, and one object of the invention is to provide a heat exchanger that can suppress an increase in a pressure loss of a fluid when the fluid flows into the heat exchanger or flows out from the heat exchanger via a header.
  • a heat exchanger of the invention including a core that has a plurality of first flow passages and a plurality of second flow passages and exchanges heat between fluids flowing in the first flow passages and the second flow passages respectively and a header that has a first header portion, which is connected to an end surface of the core and covers core end openings of the plurality of first flow passages, and a second header portion, which covers core end openings of the plurality of second flow passages.
  • the first header portion and the second header portion each include a port for causing the fluids to flow into or flow out from an inside thereof and a tank connected to the port.
  • At least one of the first header portion or the second header portion includes a guiding flow passage that is connected to the plurality of core end openings of one of the first flow passages or the second flow passages and that has a plurality of flow passages which extend to a corresponding tank side and guide the fluids between the plurality of core end openings and the tank while changing a flow passage sectional shape orthogonal to a flow direction of the fluids.
  • the heat exchanger can set flow passage sectional shapes of the plurality of flow passages of the flow passage guiding units regardless of the flow passage sectional shapes of the core end openings, and can guide the fluids between the tanks and the core via each of the flow passages.
  • the flow passage sectional shapes of the plurality of flow passages of the flow passage guiding units can be changed to become closer to a flow passage sectional shape on the tank side as becoming closer to the tank side.
  • the flow passage sectional shapes of the flow passages of the flow passage guiding units can be changed to become closer to the shapes of the core end openings as becoming closer to the core end opening side.
  • the header being provided with the guiding flow passages having the plurality of flow passages, it is not necessary to provide a flow passage structure, of which the sectional shape changes, on the core side.
  • the heat exchanger can adopt the core having a simple shape, and can suppress the structure of the core becoming complicated.
  • the plurality of core end openings each have a first flow passage width in a width direction orthogonal to a flow passage height direction, in a section orthogonal to the flow direction of the fluids.
  • the tank has a second flow passage width smaller than the first flow passage width in the width direction, in a boundary portion of the tank with the guiding flow passage.
  • the flow passages each have the flow passage sectional shape which changes such that the closer to a core end opening side, the closer a flow passage width becomes to the first flow passage width, and the closer to the tank side, the closer the flow passage width becomes to the second flow passage width.
  • the heat exchanger can suppress an increase in the pressure loss caused by a sudden change in the flow passage widths at the boundary portions between the header (tanks) and the core end openings.
  • the plurality of core end openings each have a first flow passage height in a flow passage height direction, in a section orthogonal to the flow direction of the fluids.
  • the tank has a second flow passage height larger than the first flow passage height in the flow passage height direction, in a boundary portion of the tank with the guiding flow passage.
  • the flow passages each have the flow passage sectional shape which changes such that the closer to the core end opening side, the closer a flow passage height becomes to the first flow passage height, and the closer to the tank side, the closer the flow passage height becomes to the second flow passage height.
  • the heat exchanger can suppress an increase in the pressure loss caused by a sudden change in the flow passage heights at the boundary portions between the header (tanks) and the core end openings.
  • the flow passages each are formed such that a ratio between a flow passage width and a flow passage height of the flow passage sectional shape is changed while a flow passage sectional area is kept substantially constant in the flow direction of the fluids.
  • the flow passage widths or the flow passage heights of the flow passages are changed according to the shapes of the core end openings and the flow passage sectional shapes on the tank side, it is not necessary to change the flow passage sectional area of each of the flow passages to become larger.
  • the heat exchanger can suppress an increase in the pressure loss caused by a change in the flow passage sectional areas of the flow passages.
  • the first header portion and the second header portion are integrally provided in the common header.
  • the guiding flow passage includes a first guiding flow passage having the plurality of flow passages for guiding the fluids flowed into or flowed out from the plurality of first flow passages and a second guiding flow passage having the plurality of flow passages for guiding the fluids flowed into or flowed out from the plurality of second flow passages.
  • the header When configured in such a manner, the header can be used in common by providing the first guiding flow passage and the second guiding flow passage corresponding to the first flow passages and the second flow passages respectively in the header even in a case where both of the core end openings of the first flow passages and the core end openings of the second flow passages are formed in the common end surface of the core.
  • the heat exchanger can suppress the total weight (wet weight) of the heat exchanger, in particular, in a case where a liquid fluid is used compared to a case where the first flow passages and the second flow passages are separately provided in the header. This is particularly useful for a heat exchanger used in application of strict weight limits of an aircraft.
  • the suppression of a pressure loss can be achieved by changing the flow passage sectional shapes of the respective flow passages of the first guiding flow passages and the second guiding flow passages.
  • the core end openings of the first flow passages and the core end openings of the second flow passages each include a plurality of entrance openings and a plurality of exit openings formed in the end surface of the core.
  • the guiding flow passage provided in at least one of the first header portion covering the first flow passages or the second header portion covering the second flow passages includes an entrance guiding flow passage corresponding to the plurality of entrance openings and an exit guiding flow passage corresponding to the plurality of exit openings.
  • the header 2 can be used in common due to the entrance guiding flow passage and the exit guiding flow passage corresponding to the entrance openings and the exit openings respectively.
  • the heat exchanger can suppress the total weight (wet weight) of the heat exchanger, in particular, in a case where a liquid fluid is used compared to a case where the header is separately provided from the entrance openings and the exit openings.
  • the heat exchanger can achieve the suppression of a pressure loss by changing the flow passage sectional shapes of the respective flow passages of the entrance guiding flow passages and the exit guiding flow passages.
  • the core has a stacked structure in which the plurality of first flow passages and the plurality of second flow passages are alternately stacked in a height direction via partition plates.
  • An edge of the header is joined to an edge of the end surface of the core.
  • Respective bulkheads of the plurality of flow passages of the header are joined to core end surface portions of the partition plates between the first flow passages and the second flow passages.
  • the word “join” in the invention is a concept that includes not only integrally fixing the core to the header, which are separately provided, by means of welding, brazing, and other methods but also integrally fixing (forming) the header to the core by directly forming (modelling) a structure portion configuring the header with respect to the end surface of the core.
  • the core and the header can be joined not only to the edges but also to an outer surface where the core end openings (core end surface portions of the partition plate) are not formed, in the end surface in which the core end openings are formed.
  • the heat exchanger can effectively improve the joining strength of the core and the header.
  • the pressure resistance performance of the header can be improved with the improvement of the joining strength and the degree of freedom of internal structure of the header can be enhanced, the heat exchanger can easily optimize the shapes of the flow passages and the tanks of the header.
  • the core has a rectangular parallelepiped shape, and the respective core end openings of the plurality of first flow passages and the plurality of second flow passages are vertically arranged in the end surface formed of any one of side surfaces of a rectangular parallelepiped.
  • the header is joined to the end surface so as to integrally include the first header portion and the second header portion and to collectively cover the respective core end openings of the plurality of first flow passages and the plurality of second flow passages.
  • the flow passages of the guiding flow passages can distribute (guide) a fluid to the first flow passages and the second flow passages, it is not necessary to form the respective core end openings of the plurality of first flow passages and the plurality of second flow passages at positions separated away from each other in order to mount another header.
  • the heat exchanger can simplify the structure of the core.
  • an increase in a pressure loss of a fluid when the fluid flows into the heat exchanger or flows out from the heat exchanger via the header can be suppressed.
  • FIG. 1 is a perspective view illustrating a heat exchanger according to one embodiment of the invention.
  • FIG. 2 is a horizontal sectional view illustrating a first flow passage of the heat exchanger according to the embodiment of the invention.
  • FIG. 3 is a horizontal sectional view illustrating a second flow passage of the heat exchanger according to the embodiment of the invention.
  • FIG. 4 is a view illustrating an end surface of a core.
  • FIG. 5 is an enlarged perspective view schematically illustrating a horizontal section of a header.
  • FIG. 6 is a view schematically illustrating a section taken along 500-500 line of FIG. 3 .
  • FIG. 7 is a view illustrating a core side end portion of the header.
  • FIG. 8 is a view schematically illustrating a section taken along 600-600 line of FIG. 6 .
  • FIG. 9 is an enlarged sectional view illustrating an enlarged internal structure of the header in FIG. 6 .
  • FIG. 10 is a schematic view conceptually illustrating a shape of a flow passage.
  • FIG. 11 is a schematic view illustrating a modification example in which a heat exchanger is provided with a mixing header.
  • a configuration of a heat exchanger 100 according to the embodiment will be described with reference to FIGS. 1 to 10 .
  • an example of a plate-fin heat exchanger will be described.
  • an example of a heat exchanger that is mounted on an aircraft and exchanges heat between fuel for an aircraft and oil for an aircraft (lubricating oil) will be described in the embodiment.
  • the heat exchanger 100 includes a core 1 , a header 2 , and a header for U-turn flow 3 .
  • the core 1 includes a plurality of first flow passages 1 a in which fuel 4 flows and a plurality of second flow passages 1 b in which oil 5 flows.
  • the core 1 is configured to exchange heat between the fuel 4 flowing in the first flow passages 1 a and the oil 5 flowing in the second flow passages 1 b .
  • Both of the fuel 4 and the oil 5 are examples of “fluids” in the Claims.
  • the first flow passages 1 a and the second flow passages 1 b are illustrated with different hatching in FIG. 1 .
  • the core 1 has a stacked structure in which the plurality of first flow passages 1 a and the plurality of second flow passages 1 b are alternately stacked in a height direction (Z-direction).
  • the core 1 has a rectangular parallelepiped shape.
  • the header 2 is provided on an end surface 11 which is on one side (X1-direction side) in a longitudinal direction of the core 1 .
  • the header for U-turn flow 3 is provided on an end surface which is on the other side (X2-direction side) in the longitudinal direction of the core 1 .
  • the header 2 is connected to the end surface 11 of the core 1 , and is a collecting and distributing unit which serves as an entrance or an exit of a fluid with respect to the core 1 .
  • the header 2 has a function of causing the fuel 4 to flow into (distribute) and flow out from (collect) the respective first flow passages 1 a .
  • the header 2 has a function of causing the oil 5 to flow into (distribute) and flow out from (collect) the respective second flow passages 1 b.
  • the header for U-turn flow 3 is connected to a side surface of the core 1 on the opposite side to the header 2 .
  • the header for U-turn flow 3 has a function of causing fluids (fuel 4 and oil 5 ), which have flowed from the header 2 and passed through the core 1 , to make a U-turn in a reverse direction (direction of the header 2 ) and to flow into the core 1 again.
  • the heat exchanger 100 can be provided, for example, in an aircraft. After exchanging heat with the oil 5 in the heat exchanger 100 , the fuel 4 is supplied to an engine. After being supplied to a lubricating portion (sliding portion) of the engine of the aircraft, the oil 5 is introduced into the heat exchanger 100 . After exchanging heat with the fuel 4 , the oil 5 returns to an oil tank. As a result, in the heat exchanger 100 , the fuel 4 is preheated and heat absorbed by the oil 5 is discharged by the engine being lubricated and heat being exchanged between the oil 5 which absorbed heat and the fuel 4 .
  • the core 1 is configured by alternately stacking the plurality of first flow passages 1 a and the plurality of second flow passages 1 b via tube plates 12 .
  • the tube plates 12 are examples of a “partition plate” in the Claims.
  • Side plates 13 are provided at both ends of the core 1 in a stacking direction (Z-direction), respectively.
  • the stacking direction of the first flow passages 1 a and the second flow passages 1 b will be referred to as the Z-direction
  • a direction (side where there is the end surface 11 ) where the header 2 is provided with respect to the core 1 will be referred to as an X-direction
  • a direction orthogonal to the X-direction and the Z-direction will be referred to as a Y-direction.
  • the first flow passages 1 a and the second flow passages 1 b are hollow plates sandwiched between the tube plates 12 .
  • the tube plates 12 function as primary heat transfer surfaces for heat exchange.
  • the tube plates 12 are formed of plate-shaped members each having high thermal conductivity and a small thickness.
  • first flow passages 1 a and the respective second flow passages 1 b have substantially the same structure.
  • the first flow passages 1 a and the second flow passages 1 b are defined by the tube plates 12 in the Z-direction and side bars 16 , which are both end portions in the Y-direction and are sandwiched between the tube plates 12 .
  • the first flow passages 1 a and the second flow passages 1 b linearly extend in the X-direction.
  • Respective X1-direction side end portions and X2-direction side end portions of the first flow passages 1 a and the second flow passages 1 b are open.
  • Core end openings 14 a and 14 b which are open to the outside from the end surface 11 of the core 1 , are formed in the X1-direction side end portions of the first flow passages 1 a and the second flow passages 1 b , respectively.
  • Respective openings for U-turn flow 17 which are open to the outside from the opposite end surface of the core 1 , are formed in the X2-direction side end portions of the first flow passages 1 a and the second flow passages 1 b.
  • first flow passages 1 a and the second flow passages 1 b each are partitioned into a Y1-side and a Y2-side with a partitioning member 18 disposed in the center in the Y-direction.
  • the partitioning members 18 extend from the X1-direction side end portions to the X2-direction side end portions.
  • the partitioning members 18 partition each of the core end openings 14 a of the first flow passages 1 a and the core end openings 14 b of the second flow passages 1 b into entrance openings 15 a and exit openings 15 b .
  • the openings for U-turn flow 17 of the first flow passages 1 a and the second flow passages 1 b each have an exit portion 17 a and an entrance portion 17 b , which are defined by the partitioning members 18 .
  • the core end openings 14 a of the plurality of first flow passages 1 a and the core end openings 14 b of the plurality of second flow passages 1 b are vertically arranged in the end surface 11 (refer to FIG. 4 ) which is a rectangular parallelepiped side surface.
  • the respective core end openings (entrance openings 15 a and exit openings 15 b ) of the first flow passages 1 a and the second flow passages 1 b have substantially the same sectional shape (opening shape).
  • each of the plurality of core end openings 14 has a flow passage width W 1 in a width direction (B-direction) orthogonal to a flow passage height direction (A-direction), in a section orthogonal to a flow direction of a fluid.
  • the flow passage width W 1 is an example of a “first flow passage width” in the Claims.
  • each of the plurality of core end openings 14 has a flow passage height H 1 in the flow passage height direction (A-direction), in the section orthogonal to the flow direction of a fluid.
  • the flow passage height H 1 is an example of a “first flow passage height” in the Claims.
  • the core end openings 14 (entrance openings 15 a and exit openings 15 b ) each are formed in a horizontally-long rectangular shape such that the flow passage width W 1 is larger than the flow passage height H 1 .
  • respective corrugated fins 19 are provided along circulation paths from the entrance openings 15 a to the exit openings 15 b inside the first flow passages 1 a and the second flow passages 1 b .
  • the corrugated fins 19 are provided over the entire paths of the first flow passages 1 a and the second flow passages 1 b , the corrugated fins are partially illustrated at several places of the first flow passages 1 a for convenience of illustration in FIGS. 2 and 3 .
  • the illustration of the corrugated fins 19 is omitted in each drawing other than FIGS. 2 and 3 .
  • the corrugated fins 19 function as secondary heat transfer surfaces of the first flow passages 1 a.
  • the core 1 is a counter-flow core in which the flow of the fluid (fuel 4 ) flowing in the first flow passages 1 a and the flow of the fluid (oil 5 ) flowing in the second flow passages 1 b are opposed to each other in reverse directions. That is, fuel flows into the first flow passages 1 a (refer to FIG. 2 ) from the entrance openings 15 a on a Y1-direction side, and flows in an X2-direction. After then, the fuel makes a U-turn to a Y2-direction side via the openings for U-turn flow 17 , and flows out from the exit openings 15 b on the Y2-direction side. After flowing into the second flow passages 1 b (refer to FIG.
  • the oil makes a U-turn to the Y1-direction side via the openings for U-turn flow 17 and flows out from the exit openings 15 b on the Y1-direction side.
  • the header 2 is provided to cover the end surface 11 on the X1-direction side of the core 1 .
  • the header 2 is provided to cover the entire surface of the rectangular end surface 11 (refer to FIG. 4 ).
  • the header 2 covers each of the core end openings 14 a (entrance openings 15 a and exit openings 15 b ) of the first flow passages 1 a and the core end openings 14 b (entrance openings 15 a and exit openings 15 b ) of the second flow passages 1 b.
  • the header 2 includes header portions 21 a and 21 b (refer to FIG. 2 ) covering the core end openings 14 a of the plurality of first flow passages 1 a and header portions 21 c and 21 d (refer to FIG. 3 ) covering the core end openings 14 b of the plurality of second flow passages 1 b , as illustrated in FIG. 5 .
  • Both of the header portions 21 a and 21 b are examples of a “first header portion” in the Claims.
  • Both of the header portions 21 c and 21 d are examples of a “second header portion” in the Claims.
  • the header portion 21 a covers the entrance openings 15 a , out of the core end openings 14 a of the first flow passages 1 a .
  • the header portion 21 b covers the exit openings 15 b .
  • the header portions 21 a and 21 b function as an inlet and an outlet of the fuel 4 , respectively, with respect to the plurality of first flow passages 1 a .
  • the header portion 21 c covers the entrance openings 15 a , out of the core end openings 14 b of the second flow passages 1 b .
  • the header portion 21 d covers the exit openings 15 b .
  • the header portions 21 c and 21 d function as an inlet and an outlet of the oil 5 , respectively, with respect to the plurality of second flow passages 1 b.
  • the two header portions 21 a and 21 b on a first flow passage 1 a side and the two header portions 21 c and 21 d on a second flow passage 1 b side are integrally provided in the common (single) header 2 , in the embodiment.
  • four header portions ( 21 a , 21 b , 21 c , and 21 d ) are spaces isolated from each other by an inner wall portion of the header 2 .
  • the four header portions ( 21 a , 21 b , 21 c , and 21 d ) are arranged along the end surface 11 of the core 1 in the Y-direction.
  • the header 2 integrally includes the four header portions ( 21 a , 21 b , 21 c , and 21 d ), and is joined to the end surface 11 so as to collectively cover the respective core end openings 14 ( 14 a and 14 b ) of the plurality of first flow passages 1 a and the plurality of second flow passages 1 b.
  • the header portions each include a port 22 for causing a fluid to flow into or flow out from an inside thereof and a tank 23 connected to the port 22 . That is, the two header portions 21 a and 21 b each include a port 22 a and a tank 23 a .
  • the two header portions 21 c and 21 d each include a port 22 b and a tank 23 b .
  • the header portions ( 21 a , 21 b , 21 c , and 21 d ) each include a guiding flow passage ( 24 a , 24 b , 24 c , and 24 d ) connecting the plurality of core end openings 14 to the tank 23 .
  • the port 22 , the tank 23 , and the guiding flow passage 24 are integrally formed.
  • the guiding flow passage 24 a is an example of a “first guiding flow passage” and an “entrance guiding flow passage” in the Claims.
  • the guiding flow passage 24 b is an example of the “first guiding flow passage” and an “exit guiding flow passage” in the Claims.
  • the guiding flow passage 24 c is an example of a “second guiding flow passage” and the “entrance guiding flow passage” in the Claims.
  • the guiding flow passage 24 c is an example of the “second guiding flow passage” and the “exit guiding flow passage” in the Claims.
  • the ports 22 ( 22 a and 22 b ) have a substantially circular tubular shape, and are configured as connecting portions that fluidically connect the heat exchanger 100 to an external pipe (not illustrated).
  • the ports 22 a and 22 b have flow passage widths W 2 a and W 2 b smaller than the flow passage width W 1 in the width direction (B-direction), respectively (W 2 a and W 2 b ⁇ W 1 ).
  • the ports 22 a and 22 b have flow passage heights H 2 a and H 2 b larger than the flow passage height H 1 in the flow passage height direction (A-direction), respectively (H 2 a and H 2 b >H 1 ).
  • the flow passage width W 2 a (W 2 b ) and the flow passage height H 2 a (H 2 b ) are the same and match the inner diameters of the ports 22 a ( 21 b ), respectively.
  • the ports 22 a each have an inner diameter larger than those of the ports 22 b (W 2 a >W 2 b , and H 2 a >H 2 b ).
  • ports 22 are disposed to be separated away from each other so as not to interfere the external pipe. That is, two ports 22 a (entrance side and exit side) are disposed to be separated away from each other in the Z-direction at a center side of the header 2 in the Y-direction. Two ports 22 b (entrance side and exit side) are disposed at each end portion side of the header 2 in the Y-direction so as to be separated away from each other in the Z-direction.
  • the tanks 23 are space portions extending in the Z-direction, and are gathering portions for fluids flowing between the ports 22 and the respective core end openings 14 (entrance openings 15 a or exit openings 15 b ).
  • the tanks 23 a have the same basic structure as the tanks 23 b .
  • the tanks 23 are connected to the ports 22 on the X1-direction side and are connected to the guiding flow passages 24 on the X2-direction side.
  • the tanks 23 each are formed such that a flow passage height in the Z-direction becomes larger as facing toward a guiding flow passage 24 side.
  • the tanks 23 each are formed such that a flow passage height smoothly increases from a port 22 side to the guiding flow passage 24 side.
  • a boundary portion between an inside surface of each tank 23 and an inside surface of each port 22 is formed to be a curved surface that continues smoothly (edge is not formed).
  • the tanks 23 a and 23 b have flow passage widths W 3 a and W 3 b (refer to FIGS. 2 and 3 ) smaller than the flow passage width W 1 , respectively (W 3 a and W 3 b ⁇ W 1 ).
  • the flow passage width W 3 a (W 3 b ) has a direction along a flow passage end surface 251 , which is an end surface of each guiding flow passage 24 , as a width direction.
  • Both of the flow passage widths W 3 a and W 3 b are examples of a “second flow passage width” in the Claims.
  • the tanks 23 each have a flow passage height H 3 (refer to FIG. 6 ) larger than the flow passage width W 1 (H 3 >H 1 ).
  • the flow passage height H 3 has the Z-direction as a height direction.
  • the flow passage height H 3 is an example of a “second flow passage height” in the Claims.
  • the guiding flow passages 24 ( 24 a , 24 b , 24 c , and 24 d ) are connected to the plurality of corresponding core end openings 14 and extend to corresponding tank 23 sides.
  • the guiding flow passages 24 are disposed on core 1 side end portions (X2-direction side end portions) of the header 2 , and communicate with the tanks 23 on the X1-direction side.
  • the guiding flow passages 24 have a plurality of flow passages 25 ( 25 a and 25 b ) guiding a fluid between the plurality of core end openings 14 and the tank 23 .
  • the guiding flow passages 24 have a function of guiding a fluid such that the flow of the fluid between the plurality of core end openings 14 and the tank 23 becomes smooth.
  • the guiding flow passages 24 a and 24 b of the header portions 21 a and 21 b connected to the first flow passages 1 a have the plurality of flow passages 25 a (refer to FIG. 5 ) for guiding the fuel 4 flowing into or flowing out from each of the plurality of first flow passages 1 a .
  • the guiding flow passages 24 c and 24 d of the header portions 21 c and 21 d connected to the second flow passages 1 b have the plurality of flow passages 25 b (refer to FIG. 5 ) for guiding the oil 5 flowing into or flowing out from each of the plurality of second flow passages 1 b .
  • the plurality of respective flow passages 25 a of the guiding flow passages 24 a and 24 b are connected to the core end openings 14 a (refer to FIG. 4 ) of the first flow passages 1 a .
  • the plurality of respective flow passages 25 b of the guiding flow passages 24 c and 24 d are connected to the core end openings 14 b (refer to FIG. 4 ) of the second flow passages 1 b.
  • the respective guiding flow passages 24 of the header portions include the guiding flow passages 24 a and 24 c corresponding to the plurality of entrance openings 15 a and the guiding flow passages 24 b and 24 d corresponding to the plurality of exit openings 15 b . That is, the guiding flow passage 24 a corresponds the entrance openings 15 a of the first flow passages 1 a .
  • the guiding flow passage 24 b corresponds the exit openings 15 b of the first flow passages 1 a .
  • the guiding flow passage 24 c corresponds the entrance openings 15 a of the second flow passages 1 b .
  • the guiding flow passage 24 d corresponds the exit openings 15 b of the second flow passages 1 b.
  • the plurality of flow passages 25 each are configured to guide a fluid between the plurality of core end openings 14 and the tank 23 while changing a flow passage sectional shape orthogonal to the flow direction of fluids (fuel 4 and oil 5 ). That is, the respective flow passages 25 ( 25 a and 25 b ) each connect the core end openings 14 to the tank 23 while changing the flow passage sectional shape.
  • “changing the flow passage sectional shape” means changing at least one of a flow passage height, a flow passage width, or a geometric shape (including a rectangle, a square, and a circle) of the flow passage section.
  • the flow passages 25 have core side openings 26 (refer to FIG. 7 ) disposed at the X2-direction side end portions and tank side openings 27 (refer to FIG. 8 ) disposed at the X1-direction side end portions, as illustrated in FIG. 6 .
  • the flow passages 25 each are provided as a pair with the corresponding core end opening 14 . That is, the core side openings 26 a of the flow passages 25 a are connected to the corresponding core end openings 14 a (refer to FIG. 2 ).
  • the core side openings 26 b of the flow passages 25 b are connected to the corresponding core end openings 14 b (refer to FIG. 3 ).
  • a core side end portion 2 a of the header 2 is illustrated with a hatching for convenience.
  • connection points (entrance openings 15 a and exit openings 15 b of first flow passages 1 a , and entrance openings 15 a and exit openings 15 b of second flow passages 1 b ) are different from each other, and are formed such that the Y1-direction side and the Y2-direction side are substantially symmetric in the Y-direction.
  • Each of the flow passages 25 has a common basic structure except the difference described above.
  • connection points of the flow passages 25 will be simply referred to as the “core end openings 14 ”, and a structure common to the respective flow passages 25 a and 25 b will be described except when the necessity arises.
  • the tank side openings 27 of the flow passages 25 are open to the inside of the tanks 23 .
  • Flow passage end surfaces 251 on a tank 23 side of the guiding flow passages 24 in which the tank side openings 27 are formed (refer to FIGS. 2, 3, and 5 ) are obliquely inclined in an XY-plane with respect to the X-direction and the Y-direction.
  • the flow passage end surfaces 251 are smoothly connected to the inside surfaces of the tanks 23 .
  • the Y-direction dimensions of the inclined flow passage end surfaces 251 are set to substantially match the Y-direction dimensions of the ports 22 (flow passage widths W 2 a and W 2 b ).
  • the inside surface 252 of the flow passages 25 (refer to FIGS. 2, 3, and 5 ) are formed to smoothly connect the inside surfaces of the core end openings 14 to the inside surfaces of the tanks 23 .
  • the flow passage end surfaces 251 appeared in the tanks 23 are illustrated with hatching in order to differentiate from the tank side openings 27 .
  • sectional shapes of the core side openings 26 match sectional shapes of the corresponding core end openings 14 (opening shapes). That is, the core side openings 26 each have the flow passage height H 1 and the flow passage width W 1 , which are the same as the flow passage height H 1 and the flow passage width W 1 of each of the core end openings 14 .
  • sectional shapes of the tank side openings 27 a and 27 b have flow passage heights H 4 a and H 4 b larger than the flow passage height H 1 , and the flow passage widths W 3 a and W 3 b smaller than the flow passage width W 1 , respectively.
  • the sectional shapes of the tank side openings 27 are opening shapes in the flow passage end surfaces 251 .
  • each of the flow passages 25 a and 25 b has a flow passage sectional shape which changes such that the closer to a core end opening 14 side, the closer a flow passage width become to the flow passage width W 1 of each of the core end openings 14 (refer to FIG. 7 ), and the closer to a tank 23 side, the closer a flow passage width become to the flow passage widths W 3 a and W 3 b of the boundary portions with the tanks 23 (refer to FIG. 8 ), as illustrated in FIGS. 2 and 3 .
  • each of the flow passages 25 a and 25 b is formed such that a flow passage width substantially decreases in a monotonic manner from the flow passage widths W 1 of the core end openings 14 (refer to FIG. 7 ) to the flow passage widths W 3 a andW 3 b of the tank side openings 27 (refer to FIG. 8 ).
  • each of the flow passages 25 has a flow passage sectional shape which changes such that the closer to the core end opening 14 side, the closer a flow passage height become to the flow passage height H 1 , and the closer to the tank 23 side, the closer a flow passage height become to the flow passage height H 3 , as illustrated in FIG. 9 .
  • each of the flow passages 25 is formed such that a flow passage height substantially increases in a monotonic manner from the flow passage height H 1 of the core side opening 26 (core end opening 14 ) to the flow passage heights H 4 a and H 4 b of the tank side openings 27 .
  • the flow passage heights H 4 a and H 4 b are heights between the flow passage height H 1 and the flow passage height H 3 (H 3 >H 4 a and H 4 b >H 1 ). That is, the flow passage heights of the flow passages 25 b illustrated in FIG. 9 are enlarged such that the more the flow passages protrude toward a flow passage 25 a side adjacent to the Z-direction the closer to the tank side openings 27 .
  • the flow passages 25 b that communicate with the second flow passages 1 b and the flow passages 25 a that communicate with the first flow passages 1 a are adjacent to each other in the Z-direction, and each flow passage is defined by bulkheads 253 and a flow passage end surface 251 .
  • the flow passages 25 a are blocked without openings due to the flow passage end surfaces 251 of the flow passages 25 b , in which the tank side openings 27 b are formed.
  • each of the flow passages 25 is formed by enlarging a flow passage height such that an interval between the adjacent tank side openings 27 in the Z-direction is smaller than an interval equivalent to one layer of the flow passage unit (H 1 +thickness of tube plate 12 ).
  • H 1 +thickness of tube plate 12 the same applies to the flow passages 25 a.
  • the flow passages 25 each are formed such that a ratio between a flow passage width and a flow passage height of a flow passage sectional shape (aspect ratio) is changed while a flow passage sectional area is kept substantially constant in the flow direction of a fluid.
  • the flow passages 25 b each have the flow passage width W 1 and the flow passage height H 1 in the core side opening 26 and have the flow passage width W 3 b ( ⁇ W 1 ) and the flow passage height H 4 b (>H 1 ) in the tank side opening 27 .
  • each core side opening 26 (flow passage width W 1 ⁇ flow passage height H 1 ) is substantially the same as the opening area of each tank side opening 27 (flow passage width W 3 b ⁇ flow passage height H 4 b ).
  • the flow passages 25 each are formed such that a flow passage sectional area thereof in a direction orthogonal to the flow direction of a fluid (oil 5 ) is kept substantially constant even in a middle portion between the core side opening 26 and the tank side opening 27 .
  • the flow passages 25 each have a flow passage sectional shape which is a horizontally long (wide) shape matching the core end opening 14 in the core side opening 26 , and have an aspect ratio of the section (ratio between a flow passage width and a flow passage height) that changes such that the closer to the tank side opening 27 , the smaller the flow passage width and the larger the flow passage height.
  • the tank side openings 27 of the flow passages 25 each have a shape close to a vertically long shape narrower than the core side opening 26 , and have a sectional shape close to the sectional shape of the tank 23 illustrated in FIG. 8 .
  • header portions are formed in a single header 2 , by means of the three-dimensional modelling technology (so-called 3D printer).
  • the header 2 is formed, for example, by means of a powder lamination molding method in which a powdery material is irradiated with a laser or an electronic beam to be melted or sintered.
  • the same material as the core 1 can be used as a material of the header 2 , and for example, an aluminum alloy, stainless steel (SUS), a titanium alloy, and a nickel alloy can be used.
  • the appearance of the core side end portion 2 a (hatching portion) of the header 2 has the same rectangular shape as the appearance of the end surface 11 (refer to FIG. 4 ) of the core 1 .
  • An edge 28 configuring the appearance shape of the header 2 and the bulkheads 253 defining the respective flow passages 25 of the guiding flow passages 24 are exposed to the core side end portion 2 a .
  • the edge 28 has a rectangular shape and the bulkheads 253 are formed in a lattice shape.
  • the edge 28 (refer to FIG. 7 ) of the header 2 is joined to an edge of the end surface 11 (refer to FIG. 4 ) of the core 1 , and the respective bulkheads 253 (refer to FIG. 7 ) of the plurality of flow passages 25 of the header 2 are joined to core end surface portions 12 a (refer to FIG. 4 ) of the tube plates 12 between the first flow passages 1 a and the second flow passages 1 b.
  • the edge 28 of the header 2 is joined to the side plates 13 , end surface portions of the side bars 16 , and Y-direction end portions of the core end surface portions 12 a of the tube plates 12 , of the end surface 11 of the core 1 .
  • the bulkheads 253 of the header 2 are joined to the core end surface portions 12 a of the tube plates 12 and the end surface portions of the partitioning members 18 , of the end surface 11 of the core 1 .
  • the header 2 is joined to the core 1 with the substantially entire end surface region, except for the core end openings 14 formed in the end surface 11 of the core 1 , as a joining region.
  • the header 2 is directly formed on the end surface 11 of the core 1 by the 3D printer described above which adopted the three-dimensional modelling technology. That is, first, the assembly of the core 1 on which the side plates 13 , the side bars 16 , the partitioning members 18 , the corrugated fins 19 , and the tube plates 12 are stacked is joined by brazing, and thus the core 1 is formed. After then, by the header 2 being directly modelled on the end surface 11 of the core 1 , the header 2 is configured.
  • the header for U-turn flow 3 is provided on the core 1 to cover the openings for U-turn flow 17 of the core 1 , and has a flow passage for U-turn flow 31 .
  • the flow passage for U-turn flow 31 has a substantially semicircular shape, and is provided so as to correspond to each of the first flow passages 1 a and the second flow passages 1 b .
  • a fluid flowed into the flow passage for U-turn flow 31 from one of the openings for U-turn flow 17 flows in a substantially semicircle along the flow passage for U-turn flow 31 to make a U-turn, and flows into the other one of the openings for U-turn flow 17 (entrance portions 17 b ).
  • the header portions 21 a and 21 b are provided with the guiding flow passages 24 a and 24 b , which are connected to the plurality of core end openings 14 a of the first flow passages 1 a and have the plurality of flow passages 25 a extending to the corresponding tank 23 side, respectively.
  • the header portions 21 c and 21 d are provided with the guiding flow passages 24 c and 24 d , which are connected to the plurality of core end openings 14 b of the second flow passages 1 b and have the plurality of flow passages 25 b extending to the corresponding tank 23 side, respectively.
  • the plurality of flow passages 25 ( 25 a and 25 b ) each are configured to guide a fluid between the plurality of core end openings 14 and the tank 23 while changing a flow passage sectional shape orthogonal to the flow direction of a fluid. Accordingly, the heat exchanger 100 of the embodiment can set flow passage sectional shapes of the plurality of flow passages 25 of flow passage guiding units 24 regardless of the flow passage sectional shapes of the core end openings 14 , and can guide fluids (fuel 4 and oil 5 ) between the tanks 23 and the core 1 via each of the flow passages 25 .
  • the flow passage sectional shapes of the plurality of flow passages 25 of the flow passage guiding units 24 can be changed to become closer to a flow passage sectional shape on the tank 23 side as becoming closer to the tank 23 side.
  • the flow passage sectional shapes of the flow passages 25 of the flow passage guiding units 24 can be changed to become closer to the shapes of the core end openings 14 as becoming closer to the core end opening 14 side.
  • the heat exchanger 100 of the embodiment can suppress an increase in a pressure loss of a fluid when the fluid flows into the heat exchanger 100 or flows out from the heat exchanger 100 via the header 2 .
  • the heat exchanger 100 of the embodiment can adopt the core 1 having a simple shape, and can suppress the structure of the core 1 becoming complicated.
  • the flow passages 25 ( 25 a and 25 b ) each are formed to have a flow passage sectional shape which changes such that as the closer to the core end opening 14 ( 14 a and 14 b ) side, the closer the flow passage width becomes to the flow passage width W 1 of the core end opening, and the closer to the tank 23 ( 23 a and 23 b ) side, the closer the flow passage width becomes to the flow passage widths W 3 a and W 3 b of the boundary portions between the flow passage guiding units 24 and the tanks 23 .
  • the heat exchanger 100 of the embodiment can suppress an increase in the pressure loss caused by a sudden change in the flow passage widths of the boundary portions between the header 2 (tanks 23 ) and the core end openings 14 .
  • the flow passages 25 ( 25 a and 25 b ) each are formed to have a flow passage sectional shape which changes such that the closer to the core end opening 14 ( 14 a and 14 b ) side, the closer the flow passage height becomes to the flow passage height H 1 of the core end opening, and the closer to the tank 23 ( 23 a and 23 b ) side, the closer the flow passage height becomes to the flow passage height H 3 of each of the boundary portions between the flow passage guiding units 24 and the tanks 23 .
  • a change in the flow passage height between the header 2 (tanks 23 ) and the core end openings 14 can be made moderate.
  • the heat exchanger 100 of the embodiment can suppress an increase in the pressure loss caused by a sudden change in the flow passage height of a boundary portion between the header 2 (tanks 23 ) and the core end openings 14 .
  • the flow passages 25 each are formed such that a ratio between a flow passage width and a flow passage height of a flow passage sectional shape is changed while a flow passage sectional area is kept substantially constant in the flow direction of a fluid (fuel 4 and oil 5 ). Accordingly, even in a case where the flow passage widths or the flow passage heights of the flow passages 25 are changed according to the shapes of the core end openings 14 and the flow passage sectional shapes on the tank 23 side, it is not necessary to change the flow passage sectional area of each of the flow passages 25 to become larger. As a result, the heat exchanger 100 of the embodiment can suppress an increase in the pressure loss caused by a change in the flow passage sectional areas of the flow passages 25 .
  • the header portions 21 a and 21 b and the header portions 21 c and 21 d are integrally provided in the common header 2 .
  • the guiding flow passages 24 a and 24 b having the plurality of flow passages 25 a for guiding a fluid flowing into or flowing out from the plurality of first flow passages 1 a and the guiding flow passages 24 c and 24 d having the plurality of flow passages 25 b for a fluid flowing into or flowing out from the plurality of second flow passages 1 b are provided in the corresponding header portions 21 a to 21 d , respectively.
  • the header 2 can be used in common.
  • the heat exchanger 100 of the embodiment can suppress the total weight (wet weight) of the heat exchanger 100 , in particular, in a case where liquid fluids (fuel 4 and oil 5 ) are used. This is particularly useful in application of strict weight limits of an aircraft as in the embodiment.
  • the suppression of a pressure loss can be achieved by changing the flow passage sectional shape of each of the flow passages ( 25 a and 25 b ) of the guiding flow passages ( 24 a , 24 b , 24 c , and 24 d ).
  • the header portions 21 a and 21 b that cover the entrance openings 15 a and the exit openings 15 b of the first flow passages 1 a (core end openings 14 a ) respectively are provided with the guiding flow passages 24 a and 24 b respectively.
  • the header portions 21 c and 21 d that cover the entrance openings 15 a and the exit openings 15 b of the second flow passages 1 b (core end openings 14 b ) respectively are provided with the guiding flow passages 24 c and 24 d respectively.
  • the header 2 can be used in common due to the guiding flow passages 24 a and 24 c corresponding to the entrance openings 15 a and the guiding flow passages 24 b and 24 d corresponding to the exit openings 15 b .
  • the total weight (wet weight) of the heat exchanger 100 of the embodiment can be suppressed compared to a case where the header 2 is separately provided from the entrance openings 15 a and the exit openings 15 b .
  • the heat exchanger 100 of the embodiment can achieve the suppression of a pressure loss by changing the flow passage sectional shape of each of the flow passages ( 25 a and 25 b ) of the guiding flow passages 24 a and 24 c and the guiding flow passages 24 b and 24 d.
  • the edge 28 of the header 2 is joined to an edge of the end surface 11 of the core 1 , and the respective bulkheads 253 of the plurality of flow passages 25 of the header 2 are joined to core end surface portions 12 a of the tube plates 12 between the first flow passages 1 a and the second flow passages 1 b . Accordingly, the core 1 and the header 2 can be joined not only to the edges but also to an outer surface where the core end openings 14 (core end surface portions 12 a of tube plates 12 ) are not formed, in the end surface 11 in which the core end openings 14 are formed.
  • the heat exchanger 100 of the embodiment can effectively improve the joining strength of the core 1 and the header 2 .
  • the pressure resistance performance of the header 2 can be improved with the improvement of the joining strength and the degree of freedom of internal structure of the header 2 can be enhanced, the heat exchanger 100 of the embodiment can easily optimize the shapes of the flow passages 25 and the tanks 23 of the header 2 .
  • the respective core end openings 14 a and 14 b of the plurality of first flow passages 1 a and the plurality of second flow passages 1 b are vertically arranged in the end surface 11 of the rectangular parallelepiped core 1 .
  • the header 2 is joined to the end surface 11 so as to collectively cover the respective core end openings 14 of the plurality of first flow passages 1 a and the plurality of second flow passages 1 b . Accordingly, since the core 1 can be formed in a rectangular parallelepiped shape just as a general stacked heat exchanger, it can be suppressed that the structure of the core 1 becomes complicated.
  • the flow passages 25 of the guiding flow passages 24 can distribute (guide) a fluid to the first flow passages 1 a and the second flow passages 1 b , it is not necessary to form the respective core end openings 14 of the plurality of first flow passages 1 a and the plurality of second flow passages 1 b at positions separated away from each other in order to mount another header 2 .
  • the heat exchanger 100 of the embodiment can simplify the structure of the core 1 .
  • a plate-fin heat exchanger for example, the invention is not limited thereto.
  • the invention may be applied to a shell and tube type heat exchanger.
  • any type of heat exchanger may be adopted insofar as a heat exchanger has the structure of distributing a fluid to a plurality of core end surface openings from a header.
  • the type of a fluid may be any fluid other than fuel and oil.
  • a fluid may be a gas or a liquid.
  • first flow passages and the second flow passages are provided to exchange heat between two types of fluids
  • the invention is not limited thereto.
  • three or more types of flow passage units may be provided to exchange heat among three or more types of fluids.
  • header portions ( 21 a , 21 b , 21 c , and 21 d ) having the guiding flow passages 24 are formed in a single header 2
  • the invention is not limited thereto.
  • One to three header portions may be provided in the header.
  • each of a header having two header portions corresponding to an entrance opening and an exit opening of the first flow passages 1 a and a header having two header portions corresponding to an entrance opening and an exit opening of the second flow passages 1 b may be provided.
  • Four headers each having one header portion may be provided.
  • the header for U-turn flow may not be provided.
  • U-turn portions may be provided at the first flow passages and the second flow passages inside the core 1 .
  • a fluid may not make a U-turn.
  • the headers 2 may be provided instead of the headers for U-turn flow 3 , one header in the X-direction may be set as an entrance side, and the other header in the X-direction may be set as an exit side.
  • the invention is not limited thereto.
  • the flow passage width or the flow passage height of each of the plurality of flow passages 25 may not be changed.
  • the flow passage heights of the plurality of flow passages 25 may be kept constant at H 1 to change flow passage widths.
  • the flow passage widths of the plurality of flow passages 25 may be kept constant at W 1 to change flow passage heights.
  • the invention is not limited thereto.
  • the flow passage sectional areas of the flow passages may be changed.
  • first flow passages 1 a are independently provided without being connected to other first flow passages from the entrance openings 15 a to the exit openings 15 b
  • the invention is not limited thereto.
  • a mixing header 101 for causing the plurality of first flow passages 1 a to communicate with each other from the entrance openings 15 a to the exit openings 15 b may be provided.
  • a guiding flow passage 102 having a plurality of flow passages may be formed in the mixing header 101 .
  • the mixing header 101 is provided to cover openings 103 formed in the middle of the respective first flow passages 1 a , and stirs a fluid flowed into the mixing header 101 via core side openings 104 (hatching portion) to return to each of the first flow passages 1 a .
  • the plurality of flow passages of the guiding flow passage 102 may be configured to change flow passage sectional shapes to guide a fluid such that for example, spiral flow (swirl or tumble) occurs inside the mixing header 101 . Accordingly, temperature unevenness in the respective first flow passages 1 a can be reduced. The same applies to the second flow passages 1 b.
  • the header 2 is directly formed (modelled) on the end surface 11 of the core 1 by means of the three-dimensional modelling technology
  • the invention is not limited thereto.
  • the header may be separately manufactured from the core and be joined to the core by brazing.
  • the edge of the end surface 11 of the core 1 may be joined to the edge 28 of the core side end portion 2 a of the header 2 by welding, and may not be joined to an inside region (bulkheads 253 ) of the end surface 11 .

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  • Chemical & Material Sciences (AREA)
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  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
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JP2016-003817 2016-01-12
JP2016003817A JP2017125633A (ja) 2016-01-12 2016-01-12 熱交換器
PCT/JP2016/081149 WO2017122407A1 (ja) 2016-01-12 2016-10-20 熱交換器

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190346216A1 (en) * 2018-05-08 2019-11-14 United Technologies Corporation Swirling feed tube for heat exchanger
US20210116186A1 (en) * 2019-10-18 2021-04-22 Hamilton Sundstrand Corporation Heat exchanger
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Publication number Priority date Publication date Assignee Title
US11161621B2 (en) * 2018-01-18 2021-11-02 Raytheon Technologies Corporation Heat exchanger with moving ice filter
US20190346216A1 (en) * 2018-05-08 2019-11-14 United Technologies Corporation Swirling feed tube for heat exchanger
US20210116186A1 (en) * 2019-10-18 2021-04-22 Hamilton Sundstrand Corporation Heat exchanger
US11898806B2 (en) * 2019-10-18 2024-02-13 Hamilton Sundstrand Corporation Heat exchanger

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