EP4372304B1 - Heat exchange element - Google Patents

Heat exchange element

Info

Publication number
EP4372304B1
EP4372304B1 EP21950054.3A EP21950054A EP4372304B1 EP 4372304 B1 EP4372304 B1 EP 4372304B1 EP 21950054 A EP21950054 A EP 21950054A EP 4372304 B1 EP4372304 B1 EP 4372304B1
Authority
EP
European Patent Office
Prior art keywords
heat transfer
belt
heat exchange
exchange element
shaped flat
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.)
Active
Application number
EP21950054.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4372304A4 (en
EP4372304A1 (en
Inventor
Satoshi WAKITA
Yuichiro Ikeuchi
Fumiyasu Miyake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP4372304A1 publication Critical patent/EP4372304A1/en
Publication of EP4372304A4 publication Critical patent/EP4372304A4/en
Application granted granted Critical
Publication of EP4372304B1 publication Critical patent/EP4372304B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of 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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding
    • F28F2275/065—Fastening; Joining by welding by ultrasonic or vibration welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/04—Means for preventing wrong assembling of parts
    • 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

Definitions

  • the present disclosure relates to a heat exchange element of a counterflow type formed by stacking heat transfer plates.
  • Patent Literature 1 discloses a heat exchange element formed in a hexagonal column by stacking heat transfer plates having a hexagonal shape.
  • a part of a side surface serves as an inlet/outlet port for air for heat exchange.
  • edge portions of the heat transfer plates edge portions other than edge portions facing the side surfaces serving as the inlet/outlet ports for air are joined between the heat transfer plates to be stacked, and leakage of air from the heat exchange element is prevented.
  • the joining of the edge portions is performed by thermal welding or bonding using epoxy.
  • Patent Literature 2 relates to a recuperator comprising a number of neighbouring hexagonal sheets which are connected to each other. Flow passages are formed between neighbouring sheets. Each of the sheets, at its periphery, is at least partially surrounded by and connected to an associated connecting body. Neighbouring connecting bodies are connected to each other at at least a part of the periphery of the associated sheets and together form the wall of a housing. Passage openings are provided in the wall which are connected to the flow passages for allowing air into the flow passages via the passage openings.
  • Neighbouring connecting bodies are provided with protruding parts and with recesses respectively on sides facing each other, wherein the forms of the protruding parts and of the recesses adjoin each other in order to connect the connecting bodies to each other by a press fit.
  • Patent Literature 2 on which the preamble of claim 1 is based, further provides methods for producing a connecting body and for producing a recuperator.
  • ultrasonic welding is used as a method for joining between heat transfer plates.
  • ultrasonic welding By using ultrasonic welding, it is possible to shorten a time for joining between the heat transfer plates.
  • ultrasonic vibration is transmitted to an edge portion through a tool sandwiching the edge portion.
  • a position of the heat transfer plate is deviated due to the ultrasonic vibration.
  • the present disclosure has been made in view of the above, and an object of the present invention is to provide a heat exchange element capable of accurately and easily positioning between heat transfer plates without positional deviation, even when the heat transfer plates constituting the heat exchange element are fixed with each other by ultrasonic welding.
  • FIG. 1 is a perspective view of a heat exchange element according to a first embodiment.
  • FIG. 2 is an exploded perspective view of the heat exchange element according to the first embodiment.
  • FIG. 3 is a perspective view in which a part of the heat exchange element according to the first embodiment is extracted.
  • a heat exchange element 50 a first heat transfer plate 1 and a second heat transfer plate 2 each having a hexagonal shape are alternately stacked to form a hexagonal column as a whole.
  • a stacking direction of the first heat transfer plate 1 and the second heat transfer plate 2 is simply referred to as a stacking direction.
  • a description will be given assuming that a vertical direction on the page of FIG. 1 is a vertical direction in the heat exchange element 50.
  • one of six side surfaces having a rectangular shape is a first inflow surface 61 serving as an inflow port of air into the heat exchange element 50.
  • a side surface facing a direction opposite to the first inflow surface 61 is a first outflow surface 71 from which air having flowed in from the first inflow surface 61 flows out.
  • An air passage 3 connecting the first inflow surface 61 and the first outflow surface 71 is formed inside the heat exchange element 50.
  • One side surface among two side surfaces adjacent to the first outflow surface 71 is a second inflow surface 62 serving as an inflow port of air into the heat exchange element 50.
  • a side surface facing a direction opposite to the second inflow surface 62 is a second outflow surface 72 from which air having flowed in from the second inflow surface 62 flows out.
  • the first inflow surface 61 and the second outflow surface 72 are adjacent to each other.
  • An air passage 4 connecting the second inflow surface 62 and the second outflow surface 72 is formed inside the heat exchange element 50.
  • the air passage 3 and the air passage 4 do not cross each other inside the heat exchange element 50.
  • the heat exchange element 50 is provided inside a ventilator, for example, and allows an exhaust air flow from inside to outside of a room to pass through the air passage 3, and allows a supply air flow from outside to inside of the room to pass through the air passage 4, so that the heat exchange element 50 can cause heat exchange between the supply air flow and the exhaust air flow.
  • FIG. 4 is a plan view of a first heat transfer plate according to the first embodiment.
  • the first heat transfer plate 1 has a hexagonal shape in plan view.
  • the air passage 3 is formed on one surface side of the first heat transfer plate 1
  • the air passage 4 is formed on another surface side of the first heat transfer plate 1.
  • the first heat transfer plate 1 is provided with a heat exchanger 5 that causes heat exchange between air passing through the air passage 3 and air passing through the air passage 4.
  • the heat exchanger 5 is formed by a rectangular region having, as short sides, sides 1a and 1b facing side surfaces on which the first inflow surface 61, the first outflow surface 71, the second inflow surface 62, and the second outflow surface 72 are not formed, among the side surfaces of the heat exchange element 50.
  • the heat exchanger 5 has a corrugated shape having a plurality of irregularities. In the heat exchanger 5, air passing through the air passage 3 and air passing through the air passage 4 pass in parallel and opposite directions to each other.
  • the first heat transfer plate 1 is provided with a first header 6a having a triangular shape in plan view.
  • the first header 6a includes a side 1c facing the first inflow surface 61 and a side 1d facing the second outflow surface 72, in the heat exchange element 50.
  • the first heat transfer plate 1 is provided with a second header 6b having a triangular shape in plan view.
  • the second header 6b includes a side 1e facing the first outflow surface 71 and a side 1f facing the second inflow surface 62, in the heat exchange element 50.
  • the first header 6a and the second header 6b are provided on one side and another side with the heat exchanger 5 interposed therebetween.
  • the sides 1a and 1b of the first heat transfer plate 1 are sides that are not in contact with the first header 6a and the second header 6b.
  • ribs 8 are formed in the first header 6a and the second header 6b.
  • the rib 8 formed in the first header 6a extends from the side 1c toward the heat exchanger 5.
  • the rib 8 formed in the first header 6a extends substantially parallel to the side 1d, and allows air having flowed in from the first inflow surface 61, that is, the side 1c side, to smoothly pass toward the heat exchanger 5.
  • the rib 8 formed in the second header 6b extends from the side 1e toward the heat exchanger 5.
  • the rib 8 formed in the second header 6b extends substantially parallel to the side 1f, and allows air from the heat exchanger 5 to smoothly pass toward the side 1e.
  • a belt-shaped flat portion 21 is provided, which is a belt-shaped flat region extending along the side 1c.
  • a belt-shaped flat portion 22 is provided, which is a belt-shaped flat region extending along the side 1d.
  • a step 41 along the stacking direction is provided between the belt-shaped flat portion 21 and the belt-shaped flat portion 22, in order to allow inflow of air from the side 1c and prevent inflow of air from the side 1d. More specifically, the belt-shaped flat portion 21 is formed at a position below a region where the rib 8 is formed, and the belt-shaped flat portion 22 is formed at a position above the belt-shaped flat portion 21. Note that the belt-shaped flat portion 21 and the region where the rib 8 is formed may be formed on one surface.
  • a belt-shaped flat portion 23 is provided, which is a belt-shaped flat region extending along the side 1e.
  • a belt-shaped flat portion 24 is provided, which is a belt-shaped flat region extending along the side 1f.
  • a step 42 along the stacking direction is provided between the belt-shaped flat portion 23 and the belt-shaped flat portion 24, in order to allow outflow of air from the side 1e and prevent outflow of air from the side 1f. More specifically, the belt-shaped flat portion 23 is formed at a position below a region where the rib 8 is formed, and the belt-shaped flat portion 24 is formed at a position above the belt-shaped flat portion 23. Note that the belt-shaped flat portion 23 and the region where the rib 8 is formed may be formed on one flat surface.
  • belt-shaped flat portions 25 and 26 are provided, which are belt-shaped flat regions extending along the side 1a.
  • the belt-shaped flat portion 25 and the belt-shaped flat portion 26 are formed provided with a step 43 at an intermediate portion in between in a direction along the side 1a.
  • the belt-shaped flat portion 26 is formed above the belt-shaped flat portion 25.
  • belt-shaped flat portions 27 and 28 are provided, which are belt-shaped flat regions extending along the side 1b.
  • the belt-shaped flat portion 27 and the belt-shaped flat portion 28 are formed provided with a step 44 at an intermediate portion in between in a direction along the side 1b.
  • the belt-shaped flat portion 28 is formed above the belt-shaped flat portion 27.
  • the first heat transfer plate 1 has a point symmetrical shape centered on a center position of the hexagonal shape in plan view.
  • FIG. 5 is a plan view of a second heat transfer plate according to the first embodiment.
  • the second heat transfer plate 2 has a hexagonal shape in plan view. Configurations similar to those of the first heat transfer plate 1 are denoted by identical reference numerals, and a detailed description thereof will be omitted.
  • the second heat transfer plate 2 is in a mirror image relationship with the first heat transfer plate 1.
  • the air passage 4 is formed on one surface side of the second heat transfer plate 2, and the air passage 3 is formed on another surface side of the second heat transfer plate 2.
  • the second heat transfer plate 2 is provided with the heat exchanger 5 that causes heat exchange between air passing through the air passage 3 and air passing through the air passage 4.
  • the heat exchanger 5 is formed by a rectangular region having, as short sides, sides 2a and 2b facing side surfaces on which the first inflow surface 61, the first outflow surface 71, the second inflow surface 62, and the second outflow surface 72 are not formed, among the side surfaces of the heat exchange element 50.
  • the second heat transfer plate 2 is provided with a third header 6c having a triangular shape in plan view.
  • the third header 6c includes a side 2c facing the first inflow surface 61 and a side 2d facing the second outflow surface 72, in the heat exchange element 50.
  • the second heat transfer plate 2 is provided with a fourth header 6d having a triangular shape in plan view.
  • the fourth header 6d includes a side 2e facing the first outflow surface 71 and a side 2f facing the second inflow surface 62, in the heat exchange element 50.
  • the third header 6c and the fourth header 6d are provided on one side and another side with the heat exchanger 5 interposed therebetween.
  • the sides 2a and 2b of the second heat transfer plate 2 are sides not in contact with the third header 6c and the fourth header 6d.
  • the ribs 8 are formed in the third header 6c and the fourth header 6d.
  • the rib 8 formed in the third header 6c extends from the side 2d toward the heat exchanger 5.
  • the rib 8 formed in the third header 6c extends substantially parallel to the side 2c, and allows air from the heat exchanger 5 to smoothly pass toward the side 2d.
  • the rib 8 formed in the fourth header 6d extends from the side 2f toward the heat exchanger 5.
  • the rib 8 formed in the fourth header 6d extends substantially parallel to the side 2e, and allows air having flowed in from the second inflow surface 62, that is, the side 2f side, to smoothly pass toward the heat exchanger 5.
  • a belt-shaped flat portion 31 is provided, which is a belt-shaped flat region extending along the side 2c.
  • a belt-shaped flat portion 32 is provided, which is a belt-shaped flat region extending along the side 2d.
  • a step 51 along the stacking direction is provided between the belt-shaped flat portion 31 and the belt-shaped flat portion 32, in order to allow outflow of air from the side 2d and prevent outflow of air from the side 2c. More specifically, the belt-shaped flat portion 32 is formed at a position below the region where the rib 8 is formed, and the belt-shaped flat portion 31 is formed at a position above the belt-shaped flat portion 32. Note that the belt-shaped flat portion 32 and the region where the rib 8 is formed may be formed on one flat surface.
  • a belt-shaped flat portion 33 is provided, which is a belt-shaped flat region extending along the side 2e.
  • a belt-shaped flat portion 34 is provided, which is a belt-shaped flat region extending along the side 2f.
  • a step 52 along the stacking direction is provided between the belt-shaped flat portion 33 and the belt-shaped flat portion 34, in order to allow inflow of air from the side 2f and prevent inflow of air from the side 2e. More specifically, the belt-shaped flat portion 34 is formed at a position below the region where the rib 8 is formed, and the belt-shaped flat portion 33 is formed at a position above the belt-shaped flat portion 34. Note that the belt-shaped flat portion 34 and the region where the rib 8 is formed may be formed on one flat surface.
  • belt-shaped flat portions 35 and 36 are provided, which are belt-shaped flat regions extending along the side 2a.
  • the belt-shaped flat portion 35 and the belt-shaped flat portion 36 are formed provided with a step 53 at an intermediate portion in between in a direction along the side 2a.
  • the belt-shaped flat portion 35 is formed above the belt-shaped flat portion 36.
  • belt-shaped flat portions 37 and 38 are provided, which are belt-shaped flat regions extending along the side 2b.
  • the belt-shaped flat portion 37 and the belt-shaped flat portion 38 are formed provided with a step 54 at an intermediate portion in between in a direction along the side 2b.
  • the belt-shaped flat portion 37 is formed above the belt-shaped flat portion 38.
  • the second heat transfer plate 2 has a point symmetrical shape centered on a center position of the hexagonal shape in plan view.
  • FIG. 6 is a partially enlarged cross-sectional view in which a protrusion and a base portion in the heat exchange element according to the first embodiment are enlarged.
  • FIG. 7 is a partially enlarged perspective cross-sectional view in which the protrusion and the base portion in the heat exchange element according to the first embodiment are enlarged.
  • FIG. 8 is a plan view of the base according to the first embodiment.
  • the protrusion 13 is formed so as to protrude downward.
  • the protrusion 13 is a second convex portion.
  • a back surface of the protrusion 13 is a recess.
  • a plurality of protrusions 13 are formed along the sides 1c, 1e, 2d, and 2f serving as inlet/outlet ports for air.
  • the plurality of protrusions 13 are formed for each of the sides 1c, 1e, 2d, and 2f.
  • the protrusions 13 are formed at positions where lengths of the sides 1c, 1e, 2d, and 2f are divided at equal intervals.
  • a ratio of a height of the protrusion 13 to a diameter at a root of the protrusion 13 is 1 or less. With this ratio, when the heat transfer plates 1 and 2 are formed by vacuum molding, it is possible to prevent a material from becoming too thin and forming a hole.
  • the base 14 is formed so as to protrude upward.
  • a cross-sectional shape of the base 14 is trapezoidal shape.
  • a flat region is provided at a top portion of the base 14, and a recess 14a recessed downward is formed in the flat region.
  • a planar shape of the base 14 is a rhombus shape.
  • the recess 14a has an elongated hole shape whose longitudinal direction is a direction toward a center of the heat transfer plates 1 and 2 in plan view.
  • a width along a short direction of the recess 14a is a width in which the protrusion 13 is fitted.
  • the base 14 is provided such that a longer diagonal line among two diagonal lines of the rhombus is parallel to the sides 1d, 1f, 2c, and 2e with which the base 14 is along. That is, it suffices that the base 14 is provided such that the longer diagonal line among the two diagonal lines of the rhombus is along an air flow direction.
  • the base 14 is provided as close as possible to the belt-shaped flat portions 22, 24, 31, and 33, at a position away to such an extent that the base 14 does not overlap with the belt-shaped flat portions 22, 24, 31, and 33 with a gap provided in between, on a straight line substantially parallel to the air flow direction. Note that, in the present embodiment, it can also be said that the base 14 is disposed on a straight line substantially parallel to the belt-shaped flat portions 22, 24, 31, and 33.
  • the protrusion 13 and the base 14 are formed at positions overlapping with each other in plan view when the first heat transfer plate 1 and the second heat transfer plate 2 are stacked. As illustrated in FIGS. 6 and 7 , when the heat transfer plates 1 and 2 are stacked, a region serving as a flat surface of a top portion of the base 14 abuts on the heat transfer plates 1 and 2 stacked above. Further, the protrusion 13 is fitted into the recess 14a of the base 14. The protrusion 13 is fitted into the recess 14a and thus is not exposed to the air passages 3 and 4. Note that the protrusion 13 may protrude upward, and the base 14 may protrude downward.
  • the cone cover 15 is formed on the belt-shaped flat portions 25, 27, 36, and 38 of the heat transfer plates 1 and 2.
  • a plurality of cone covers 15 are formed for each of the belt-shaped flat portions 25, 27, 36, and 38.
  • the cone covers 15 are formed at positions where lengths of the belt-shaped flat portions 25, 27, 36, and 38 are divided at equal intervals.
  • the cone covers 15 are formed at positions closer to the heat exchanger 5 than a center in a width direction of each of the belt-shaped flat portions 25, 27, 36, and 38.
  • FIG. 9 is a partially enlarged cross-sectional view in which a cone cover and a cone portion in the heat exchange element according to the first embodiment are enlarged.
  • FIG. 10 is a partially enlarged perspective cross-sectional view in which the cone cover and the cone portion in the heat exchange element according to the first embodiment are enlarged.
  • the cone cover 15 is a concave portion recessed upward from below.
  • the cone cover 15 protrudes on a back surface side of the concave portion.
  • the cone cover 15 is formed in a conical shape whose tip end has a flat shape.
  • a ratio of a height of the cone cover 15 to a gap distance between the heat exchanger 5 and the cone cover 15 is 1 or less.
  • the concave portion of the cone cover 15 has an elongated hole shape extending in a length direction of each of the belt-shaped flat portions 25, 27, 36, and 38.
  • the cone 16 is formed on the belt-shaped flat portions 26, 28, 35, and 37 of the heat transfer plates 1 and 2.
  • a plurality of cones 16 are formed for each of the belt-shaped flat portions 26, 28, 35, and 37.
  • the cones 16 are formed at positions where lengths of the belt-shaped flat portions 26, 28, 35, and 37 are divided at equal intervals.
  • the cones 16 are formed at positions closer to the heat exchanger 5 than a center in a width direction of each of the belt-shaped flat portions 26, 28, 35, and 37.
  • a ratio of a height of the cone 16 to a gap distance between the heat exchanger 5 and the cone 16 is 1 or less. With this ratio, when the heat transfer plates 1 and 2 are formed by vacuum molding, it is possible to prevent a material from becoming too thin and forming a hole.
  • the cone 16 is a first convex portion protruding upward.
  • the cone 16 is formed in a conical shape whose tip end has a curved surface.
  • the belt-shaped flat portion 21 abuts on the belt-shaped flat portion 31 below.
  • the belt-shaped flat portion 22 abuts on the belt-shaped flat portion 32 above.
  • the belt-shaped flat portion 23 abuts on the belt-shaped flat portion 33 below.
  • the belt-shaped flat portion 24 abuts on the belt-shaped flat portion 34 above.
  • the belt-shaped flat portion 25 abuts on the belt-shaped flat portion 35 below.
  • the belt-shaped flat portion 26 abuts on the belt-shaped flat portion 36 above.
  • the belt-shaped flat portion 27 abuts on the belt-shaped flat portion 37 below.
  • the belt-shaped flat portion 28 abuts on the belt-shaped flat portion 38 above.
  • the abutting belt-shaped flat portions 21, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 36, 37, and 38 serve as joining edge joined by ultrasonic welding.
  • the cone cover 15 and the cone 16 are formed at positions overlapping with each other in plan view when the heat transfer plates 1 and 2 are stacked. As illustrated in FIGS. 9 and 10 , when the heat transfer plates 1 and 2 are stacked, the cone 16 fits into the concave portion of the cone cover 15. Note that the concave portion of the cone cover 15 may be recessed downward, and the cone 16 may be protruded downward.
  • FIG. 11 is a view illustrating a schematic configuration of a manufacturing device for the heat exchange element according to the first embodiment.
  • the manufacturing device includes a receiving base 17 on which the heat transfer plates 1 and 2 are placed.
  • the receiving base 17 has a function of holding the heat transfer plates 1 and 2 by a method such as suction, and is provided with a hole (not illustrated) for positioning at a location identical to a position of the protrusion 13.
  • a guide pin 18 and a guide pin 19 are included at locations identical to positions of the protrusion 13.
  • FIG. 12 is a perspective cross-sectional view illustrating a state in which a guide pin illustrated in FIG. 11 is fitted into the protrusion.
  • the guide pin 18 is movable up and down, and a tip end thereof is inserted into a recess on a back surface of the protrusion 13 as illustrated in FIG. 12 when the guide pin 18 moves downward. This similarly applies to the guide pin 19.
  • FIGS. 13 to 16 are views illustrating a manufacturing process for the heat exchange element according to the first embodiment.
  • the first heat transfer plate 1 which is the first piece of stacking, is placed on the receiving base 17.
  • the protrusion 13 is aligned with the hole of the receiving base 17, so that the protrusion 13 is fitted into the hole of the receiving base 17 to perform positioning.
  • a tip end of the guide pin 18 is fitted into the concave portion on the back surface of the protrusion 13 of the second heat transfer plate 2 to be stacked next, and then, as illustrated in FIG. 15 , the second heat transfer plate 2 is stacked.
  • the abutting belt-shaped flat portions 22, 24, 26, 28, 32, 34, 36, and 38 are fixed with one another by ultrasonic welding in a state where both the heat transfer plates 1 and 2 of the upper layer and the lower layer are positioned by the manufacturing device.
  • stacking is performed while positioning is performed using the guide pins 19 with respect to the first heat transfer plates 1 to be stacked next.
  • the first heat transfer plate 1 and the second heat transfer plate 2 are stacked up to any height by alternately repeatedly stacking and fixing.
  • the guide pin 18 is used for positioning the second heat transfer plate 2
  • the guide pin 19 is used for positioning the first heat transfer plate 1.
  • the tip ends of the guide pins 18 and 19 are fitted into the concave portions on the back surfaces of the protrusions 13, and the heat transfer plates 1 and 2 on the upper layer are pressed against the heat transfer plates 1 and 2 below. Therefore, frictional resistance is generated between the flat portion of the base 14 in which the protrusion 13 is fitted and the region of the headers 6a, 6b, 6c, and 6d that abuts on the flat portion of the base 14. As a result, reliability of ultrasonic welding is improved, and a yield is improved.
  • the protrusion 13, the base 14, the cone cover 15, and the cone 16 formed on the heat transfer plates 1 and 2 are less likely to cause positional deviation in a stacked state. Therefore, even by ultrasonic welding that applies vibration to the heat transfer plates 1 and 2, positional deviation is less likely to occur in the heat transfer plates 1 and 2.
  • the protrusion 13 is fitted into the recess 14a of the base 14 and the cone 16 is fitted into the cone cover 15 only by stacking the heat transfer plates 1 and 2, positioning can be performed accurately and easily.
  • the protrusion 13 is tightly fitted into the recess 14a of the base 14 and the cone 16 is tightly fitted into the cone cover 15, it is possible to further reduce occurrence of positional deviation.
  • the heat transfer plates 1 and 2 contract toward a center thereof after molding. Since the recess 14a has an elongated hole shape whose longitudinal direction is a direction toward a center of the heat transfer plates 1 and 2 in plan view, the protrusion 13 is easily fitted into the recess 14a even when the position of the base 14 is deviated due to contraction toward the center of the heat transfer plates 1 and 2. In addition, by the protrusions 13 abutting on the recesses 14a, the heat transfer plates 1 and 2 are prevented from being deviated from each other in a direction different from the direction toward the center of the heat transfer plates 1 and 2, so that positioning accuracy is also improved.
  • the protrusion 13 and the base 14 are at positions close to the belt-shaped flat portions 22, 24, 31, and 33 even in the regions of the headers 6a, 6b, 6c, and 6d, and the cone cover 15 and the cone 16 are also at the belt-shaped flat portions 25, 26, 27, 28, 35, 36, 37, and 38. Therefore, even when a force for deviating the heat transfer plates 1 and 2 acts by ultrasonic welding, a bending stress generated in the heat transfer plates 1 and 2 remains in a short distance range, so that it is possible to make the heat transfer plates less likely to be bent.
  • the plurality of protrusions 13, the plurality of bases 14, the plurality of cone covers 15, and the plurality of cones 16 are formed for each of the belt-shaped flat portions 21, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 36, 37, and 38, positional deviation is further less likely to occur.
  • the protrusion 13 has a tapered shape
  • the cone cover 15 has a conical shape
  • the cone 16 has a conical shape
  • a range to be welded is less likely to reach other ranges, or a portion having a welding defect is less likely to occur. Accordingly, clogging due to excessive welding and leakage of air from the heat exchange element 50 can be prevented.
  • the base 14 is provided such that the longer diagonal line among the two diagonal lines of the rhombus is along the air flow direction, and the top portion of the base 14 abuts on the adjacent heat transfer plate 1 or 2, the base 14 is less likely to obstruct an air flow.
  • the base 14 is provided such that the longer diagonal line among the two diagonal lines of the rhombus is along the air flow direction, and the top portion of the base 14 abuts on the adjacent heat transfer plate 1 or 2, the base 14 is less likely to obstruct an air flow.
  • by providing a gap between the base 14 and the belt-shaped flat portions 22, 24, 31, and 33 it is possible to reduce disturbance of a wind flow around the base 14 and the sides 1d, 1f, 2c, and 2e and to suppress occurrence of a pressure loss, as compared with a case where no gap is provided.
  • the bases 14 linearly in the air flow direction, it is possible to similarly reduce disturbance of the flow and suppress occurrence of a pressure loss.
  • the base 14 is provided on the headers 6a, 6b, 6c, and 6d, a width of the belt-shaped flat portions 21, 22, 23, 24, 31, 32, 33, and 34 can be narrowed as compared with a case where the base 14 is provided on the belt-shaped flat portions 21, 22, 23, 24, 31, 32, 33, and 34. If the heat transfer plates 1 and 2 have equal sizes, the headers 6a, 6b, 6c, and 6d can be widened as the widths of the belt-shaped flat portions 21, 22, 23, 24, 31, 32, 33, and 34 are narrower.
  • the base 14 is to be provided in the flow path, by widening the headers 6a, 6b, 6c, and 6d, a pressure loss of the heat exchange element 50 can be reduced as compared with a case where the base 14 is provided in the belt-shaped flat portions 21, 22, 23, 24, 31, 32, 33, and 34.
  • the configuration described in the above embodiment is an example of the contents of the present disclosure.
  • the configuration of the embodiment can be combined with another known technique. A part of the configuration of the embodiment can be omitted or changed without departing from the gist of the present disclosure.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP21950054.3A 2021-07-12 2021-07-12 Heat exchange element Active EP4372304B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/026095 WO2023286110A1 (ja) 2021-07-12 2021-07-12 熱交換素子

Publications (3)

Publication Number Publication Date
EP4372304A1 EP4372304A1 (en) 2024-05-22
EP4372304A4 EP4372304A4 (en) 2024-08-21
EP4372304B1 true EP4372304B1 (en) 2025-09-03

Family

ID=84919145

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Application Number Title Priority Date Filing Date
EP21950054.3A Active EP4372304B1 (en) 2021-07-12 2021-07-12 Heat exchange element

Country Status (6)

Country Link
US (1) US20240240880A1 (https=)
EP (1) EP4372304B1 (https=)
JP (1) JP7599567B2 (https=)
CN (1) CN117651841A (https=)
CA (1) CA3226203A1 (https=)
WO (1) WO2023286110A1 (https=)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4279021B2 (ja) 2002-03-28 2009-06-17 パナソニックエコシステムズ株式会社 熱交換器
JP2004293862A (ja) 2003-03-26 2004-10-21 Matsushita Electric Ind Co Ltd 熱交換器
KR100724225B1 (ko) * 2005-11-30 2007-05-31 마쓰시타 에코시스테무즈 가부시키가이샤 열교환기
JP2007285691A (ja) * 2006-03-22 2007-11-01 Matsushita Electric Ind Co Ltd 熱交換器
JP4816517B2 (ja) * 2006-09-28 2011-11-16 パナソニック株式会社 熱交換素子
KR100783599B1 (ko) * 2007-03-09 2007-12-07 충남대학교산학협력단 환기장치용 열교환기
CN102183077A (zh) * 2011-01-30 2011-09-14 霍尼韦尔（中国）有限公司 能量回收装置
NL2018175B1 (nl) 2017-01-16 2018-07-26 Recair Holding B V Recuperator

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Publication number Publication date
JP7599567B2 (ja) 2024-12-13
CN117651841A (zh) 2024-03-05
EP4372304A4 (en) 2024-08-21
JPWO2023286110A1 (https=) 2023-01-19
WO2023286110A1 (ja) 2023-01-19
US20240240880A1 (en) 2024-07-18
EP4372304A1 (en) 2024-05-22
CA3226203A1 (en) 2023-01-19

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