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WO2024135024A1 - Élément d'échange de chaleur et appareil de moulage de ruban - Google Patents

Élément d'échange de chaleur et appareil de moulage de ruban Download PDF

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Publication number
WO2024135024A1
WO2024135024A1 PCT/JP2023/034572 JP2023034572W WO2024135024A1 WO 2024135024 A1 WO2024135024 A1 WO 2024135024A1 JP 2023034572 W JP2023034572 W JP 2023034572W WO 2024135024 A1 WO2024135024 A1 WO 2024135024A1
Authority
WO
WIPO (PCT)
Prior art keywords
ribbon
heat exchange
exchange element
knit
concave
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.)
Ceased
Application number
PCT/JP2023/034572
Other languages
English (en)
Japanese (ja)
Inventor
一浩 関
勉 大東
貴志 松本
聡司 荒井
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.)
Fuji Filter Manufacturing Co Ltd
Original Assignee
Fuji Filter Manufacturing Co Ltd
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
Priority claimed from JP2023119794A external-priority patent/JP2024091248A/ja
Application filed by Fuji Filter Manufacturing Co Ltd filed Critical Fuji Filter Manufacturing Co Ltd
Publication of WO2024135024A1 publication Critical patent/WO2024135024A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F33/00—Tools or devices specially designed for handling or processing wire fabrics or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/82—Preventing flashback or blowback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element

Definitions

  • the present invention relates to a heat exchange element and a ribbon forming device.
  • a flame arrester As an example of a heat exchanger, a flame arrester is known, which is a device that allows the passage of a fluid (flammable gas) in a pipe and prevents flame transmission.
  • the flame arrester has a large number of fine gaps through which a flame cannot pass, and has a built-in flame quenching element that has a structure that can cool and extinguish a flame by heat exchange.
  • flame quenching elements include a wire mesh type in which many wire meshes are overlapped in the direction of fluid passage, and a crimped ribbon type in which a flat metallic ribbon and a crimped metallic ribbon with many crimps (folds, wavy shapes) on the flat ribbon are overlapped and wound in a spiral shape.
  • the crimped ribbon type has many roughly triangular prism-shaped cellular structures extending in the direction of fluid passage between the flat ribbon and the crimped ribbon.
  • Patent Document 1 describes a flame arrester incorporating a crimp ribbon type flame quenching element.
  • the present invention has been made in consideration of the above circumstances, and has an object to provide a novel heat exchange element in which the surface area of the element that comes into contact with a fluid is increased, thereby improving heat exchange efficiency.
  • the present invention provides a roughly flat or columnar heat exchange element in which one side of a first ribbon having a first configuration and one side of a second ribbon having a second configuration different from the first configuration are superimposed on each other and wound in a spiral shape so that the longitudinal direction of each ribbon extends in the circumferential direction, and at least one of the first ribbon and the second ribbon is made of a knitted ribbon made by weaving metal wires.
  • the contact area between the fluid and the heat exchange element can be increased, allowing for efficient heat exchange between the fluid and the heat exchange element.
  • FIG. 2 is a diagram showing an actual photograph of the heat exchange element according to the first embodiment.
  • 1A to 1D are photographs illustrating the process of producing a heat exchange element.
  • FIG. 2 is a schematic diagram illustrating a process for forming a flat ribbon into a corrugated sheet.
  • FIG. 11 is a diagram showing an actual photograph of a heat exchange element according to a second embodiment.
  • FIG. 11 is a photograph showing an actual heat exchange element according to a third embodiment.
  • 13A and 13B are actual photographs showing modified examples of knit ribbons.
  • 13A and 13B are diagrams showing modified examples of a corrugated ribbon.
  • 13A and 13B are diagrams showing examples of combinations of corrugated ribbons.
  • FIG. 10 is a schematic perspective view showing a ribbon corresponding to FIG. 9 .
  • 10A and 10B are diagrams for explaining a forming apparatus for producing the wavy ribbon shown in FIG. 9, in which (a) is a diagram showing an actual photograph of the forming apparatus, (b) is a plan view of a gear roller, and (c) is a diagram for explaining the position of the gear teeth of the gear roller.
  • 13A and 13B are schematic perspective views showing other modified examples of the wavy ribbon.
  • FIG. 13 is a plan view of a pair of gear rollers that constitute a forming device for producing the corrugated ribbon shown in FIG. 12 .
  • 1 is a cross-sectional view showing an example of the configuration of a metal wire that constitutes a knit ribbon.
  • FIG. 1 is a photograph showing an actual heat exchange element according to the first embodiment.
  • 2(a) to (d) are photographs illustrating the process of producing a heat exchange element.
  • the heat exchange element 1 is a means for cooling or heating a fluid by passing the high-temperature or low-temperature fluid through the heat exchange element 1.
  • the heat exchange element 1 is incorporated into a heat exchange unit alone, or, if necessary, a plurality of heat exchange elements 1 are incorporated into the heat exchange unit in an axially overlapping state.
  • the heat exchange element 1 is used to pass a fluid in the direction of its axis Ax.
  • the heat exchange element 1 is particularly suitable for use as a means for exchanging heat with gas.
  • the heat exchange element 1 is used, for example, as a flame quenching element incorporated into a flame arrester, which is a heat exchange unit. As shown in Fig.
  • the heat exchange element 1 is a roughly flat plate-like (or flat column-like) shape in which one surface of a first ribbon (first member) 20 and one surface of a second ribbon (second member) 30 are superimposed on each other, and the ribbons 20, 30 are spirally wound so that their longitudinal directions extend in the circumferential direction.
  • the first ribbon 20 and the second ribbon 30 are arranged (in contact or joined) so that heat can be transferred between them.
  • At least one of the first ribbon 20 and the second ribbon 30 is composed of a knit ribbon 41 (flat knit ribbon 42, wavy knit ribbon 43) made by knitting a metal wire W (see Fig. 2).
  • the heat exchange element 1 may have a generally circular shape, a generally polygonal shape, or another shape (e.g., star shape) in a plan view.
  • the first ribbon 20 and the second ribbon 30 have substantially the same width direction length (short side direction length).
  • the first ribbon 20 is a corrugated ribbon in a band shape having a shape (first form) in which concave ribs 21 and convex ribs 22 extending in a direction (first direction) intersecting with the longitudinal direction of the first ribbon 20 are repeated along the longitudinal direction (second direction) of the first ribbon 20.
  • a portion that becomes the concave ribs 21 (or the convex ribs 22) on one surface of the first ribbon 20 becomes the convex ribs 22 (or the concave ribs 21) on the other surface of the first ribbon 20.
  • each of the concave ribs 21 and each of the convex ribs 22 extend linearly in a direction perpendicular to the longitudinal direction of the first ribbon 20.
  • each of the concave ribs 21 and each of the convex ribs 22 traverses the first ribbon 20 in its short direction.
  • the second ribbon 30 has a second configuration different from the first configuration.
  • the second ribbon 30 is a flat ribbon having a flat plate and band shape.
  • the grooves 21, 21... of the first ribbon 20 overlap one surface of the second ribbon 30, so that a plurality of roughly columnar cells 11, 11... are formed between the grooves 21, 21... of the first ribbon 20 and the second ribbon 30.
  • the shape of each cell 11, 11... depends on the surface shape of the grooves 21 and the second ribbon 30, but in this example is roughly triangular prism-shaped.
  • Each cell 11, 11... allows fluid to pass along the extension direction of the grooves 21, 21....
  • the heat exchange element 1 has a plurality of cells 11, 11... that allow fluid to pass from one side to the other in its axial direction (or thickness direction).
  • Fig. 3 is a schematic diagram illustrating the process of forming a flat ribbon into a corrugated sheet.
  • at least one continuous metal wire W is circularly knitted to produce a cylindrical tubular knit 40.
  • the tubular knit 40 is a knitted product that is continuously knitted in a spiral shape with its circumferential direction as the course direction and its axial direction as the wale direction.
  • the metal wire W may be a single metal wire WA or a metal wire WB (Fig. 6) in which a plurality of metal wires WA are gathered together.
  • the tubular knit 40 is pressed into a two-ply shape so that the opposing inner diameter surfaces of the tubular knit 40 are in close contact with each other to produce a flat belt-like flat knit ribbon 42.
  • the axial direction of the tubular knit 40 corresponds to the longitudinal direction of the flat knit ribbon 42.
  • the flat knit ribbon 42 is the second ribbon 30 (FIG. 1).
  • a plurality of concave stripes 44, 44... and convex stripes 45, 45... are formed repeatedly along the longitudinal direction of the flat knit ribbon 42 to produce a corrugated knit ribbon 43.
  • the corrugated knit ribbon 43 is the first ribbon 20 (FIG. 1).
  • the concave stripes 44 are the concave stripes 21, and the convex stripes 45 are the convex stripes 22.
  • a forming device 100 for forming a flat belt-like ribbon into a corrugated sheet is provided with a pair of gear rollers 101, 101 having a plurality of meshing gear teeth 102, 102.... Each of the gear teeth 102, 102... has a shape corresponding to the concave and convex strips formed on the ribbon.
  • the gear rollers 101, 101 that produce the wavy knit ribbon 43 (FIG. 2(c)) in which the concave ribs 44 and the convex ribs 45 are perpendicular to the longitudinal direction of the ribbon are spur gears. With the running direction of the surfaces of the gear rollers 101, 101 aligned with the longitudinal direction of the flat knit ribbon 42 (FIG. 2(a)), the flat knit ribbon 42 is inserted between the gear rollers 101, 101 that rotate in a fixed direction, whereby the flat knit ribbon 42 is plastically deformed into a corrugated shape to produce the wavy knit ribbon 43.
  • the first ribbon 20 and the second ribbon 30 are overlapped with one side of each ribbon facing each other. Then, the two ribbons are wound in a spiral shape to produce the heat exchange element 1 shown in FIG. 1.
  • the metal materials used for the knit ribbon 41 include iron, copper, stainless steel, etc. Examples of the sizes of each part are as follows:
  • the metal wire W (WA) has a diameter of 0.3 to 0.6 mm.
  • the short-side length of the knit ribbon 41 is 20 to 80 mm, and the thickness t is 1 to 3 mm.
  • the height of the peaks of the concave (or convex) stripes of the wavy knit ribbon 43 is 5 to 10 mm, and the thickness of the wavy knit ribbon 43 is 1 to 3 mm.
  • the side where the winding of the ribbon begins is referred to as the axial center portion 13
  • the portion on the outer periphery of the axial center portion 13 where the first ribbon 20 and the second ribbon 30 overlap in alternating layers in the radial direction is referred to as the intermediate portion 14, and the outer periphery of the intermediate portion 14 is referred to as the outer periphery portion 15.
  • the outer periphery portion 15 is a single-layer or multiple-layer portion composed of that ribbon.
  • the outer periphery portion 15 is referred to as the portion of the ribbon that appears at the outermost periphery of the heat exchange element 1.
  • the knit ribbon 41 (flat knit ribbon 42 or wavy knit ribbon 43) is wound around the axial center 13 of the heat exchange element 1 in this example.
  • the first ribbon 20 (wavy knit ribbon 43) is wound around the axial center 13.
  • the knit ribbon 41 located at the axial center 13 is continuous with the knit ribbon 41 that constitutes the middle portion 14. It is desirable that the knit ribbon 41 be wound around the axial center 13 for about 1 to 3 turns (diameter 10 to 30 mm).
  • the axial center portion 13 By constructing the axial center portion 13 only from one knit ribbon, it is possible to improve the moldability of the heat exchange element 1.
  • the axial center portion 13 When the axial center portion 13 is constructed only from the wavy knit ribbon 43, it is possible to increase the radial length with a small number of windings. Conversely, when the axial center portion 13 is constructed only from the flat knit ribbon 42, it is possible to tightly wind the axial center portion 13, which prevents the heat exchange element 1 from losing its shape.
  • the knit ribbon constituting the axial portion 13 and the knit ribbon constituting the intermediate portion 14 may be discontinuous (independent) as shown in Fig. 4. By making the knit ribbon constituting the axial portion 13 and the knit ribbon constituting its outer periphery independent, the state of the axial portion 13 can be freely set. When making the knit ribbon constituting the axial portion 13 and the knit ribbon constituting the intermediate portion 14 independent, it is desirable to fix the end of the winding of the axial portion 13 by a method such as welding so that the
  • the outer periphery 15 of the heat exchange element 1 is composed only of the flat knit ribbon 42 .
  • the outer periphery 15 is desirably made of a flat ribbon (e.g., flat knit ribbon 42), but is not limited to this.
  • a corrugated ribbon For example, when fitting the heat exchange element 1 into other components by utilizing the elasticity of metal, it is preferable to make the outer periphery 15 of a corrugated ribbon.
  • terminal portion 16 The end of the ribbon at the end of the winding (terminal portion 16) is processed so that the wound shape of the ribbon is maintained.
  • terminal portion 16 is fixed (joined) to the part of the ribbon that overlaps the inner diameter side of terminal portion 16 by brazing, welding, crimping using a dedicated fastener, or other methods.
  • the most suitable fixing method is selected depending on the shape of the ribbon that constitutes the outer periphery 15. For example, when joining flat knit ribbons 42, 42 together, crimping using a hook fastener is preferably selected.
  • the wound shape of the ribbon may be maintained by wrapping a metal wire such as wire 17 around the outside of the outer periphery 15 of the heat exchange element 1.
  • the size of the heat exchange element 1 produced in this way is, for example, 50 to 500 mm in diameter and 20 to 80 mm in height.
  • both the first ribbon 20 and the second ribbon 30 are knit ribbons 41, and a space (or gap) is formed between each adjacent portion of the metal wire W.
  • This space functions as a flow path for passing a fluid inside the thickness t (FIGS. 2(b) and (c)) of the knit ribbon 41. That is, the first ribbon 20 and the second ribbon 30 have a flow path through which the fluid can pass in the short direction of the ribbon within the thickness t. In addition, the first ribbon 20 and the second ribbon 30 have a flow path through which the fluid can pass in the thickness t direction of the ribbon from one side of the ribbon to the other side.
  • the contact area between the fluid and the heat exchange element 1 is increased, and a complex flow path is formed inside, making it possible to efficiently exchange heat with the fluid.
  • a knit ribbon for the heat exchange element 1 it becomes less susceptible to deformation due to thermal expansion.
  • the size of the openings (holes) and wire density of each knit ribbon can be adjusted by the thickness and number of metal wires used, or the size of the mesh (stitches), etc.
  • the flat knit ribbon 42 may have a configuration of four or more layers.
  • the flat knit ribbon 42 may have a configuration in which four or more knit layers are overlapped.
  • the flat knit ribbon 42 may only have folds extending along the axial direction of the tubular knit 40, or may have folds intersecting (perpendicular to) the axial direction of the tubular knit 40.
  • a wavy knit ribbon 43 may be formed from a flat knit ribbon 42 having four or more knit layers.
  • a knit that has been flat-knitted into a ribbon shape or a multi-layered knit made by folding a flat-knitted knit may be used as the knit ribbon.
  • the heat exchange element may be formed by overlapping and winding three or more ribbons.
  • the first ribbon 20 and the second ribbon 30 constituting the heat exchange element 1 may be members having a generally wider sheet shape.
  • the heat exchange element 1 may be configured such that a first member corresponding to the first ribbon 20 and a second member corresponding to the second ribbon 30 are alternately stacked in layers such that their surfaces face each other.
  • Second Embodiment 4 is a photograph showing a heat exchange element according to the second embodiment.
  • the same members as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted as appropriate.
  • the heat exchange element 2 includes a corrugated first ribbon 20 and a flat band-like second ribbon 30.
  • the first ribbon 20 is composed of a corrugated ribbon 51
  • the second ribbon 30 is composed of a flat knit ribbon 42 (FIG. 2(b)).
  • the corrugated ribbon 51 is produced by the same processing method as the corrugated knit ribbon 43, using a forming device 100 shown in Fig. 3.
  • the corrugated ribbon 51 is a so-called crimp ribbon, which is a flat/strip-shaped metal ribbon processed into a corrugated shape by providing concave strips 21 and convex strips 22.
  • the corrugated ribbon 51 differs from a knit ribbon in that it does not have holes in its surface through which a fluid can pass.
  • the heat exchange element 2 is produced in the same manner as in the first embodiment, except that the first ribbon 20 is a corrugated sheet ribbon 51 .
  • the same metal material as the knitted ribbon is used for the corrugated ribbon 51.
  • the thickness of the flat/strip-shaped metal ribbon is 0.3 to 0.4 mm
  • the height of the grooves 21 and the protrusions 22 is 5 to 10 mm.
  • the knit ribbon 41 (flat knit ribbon 42) is wound around the axial portion 13 of the heat exchange element 2.
  • the knit ribbon 41 constituting the axial portion 13 and the knit ribbon 41 constituting the intermediate portion 14 are discontinuous, but the two may be continuous.
  • Only the knit ribbon 41 (flat knit ribbon 42) is wound around the outer periphery 15 of the heat exchange element 2.
  • the end portion 16, which is the flat knit ribbon 42, and the portion of the flat knit ribbon 42 that overlaps with the end portion 16 are joined together.
  • the fluid cannot move in the inner and outer radial directions of the heat exchange element 2 through the first ribbons 20.
  • the heat exchange element 2 does not prohibit the fluid from moving in the circumferential direction between adjacent first ribbons 20, 20, but the heat exchange element 2 exerts the function of preferentially (or to a certain extent restrictively) guiding the fluid in the extension direction of the grooves 21.
  • the second ribbon 30 is composed of the knitted ribbon 41, the contact area between the fluid and the heat exchange element 2 can be increased, making it possible to efficiently cool the high-temperature fluid.
  • the heat exchange element 3 includes a corrugated first ribbon 20 and a flat band-like second ribbon 30.
  • the first ribbon 20 is composed of a corrugated knit ribbon 43 (FIG. 2(c))
  • the second ribbon 30 is composed of a flat band-like metal ribbon (flat ribbon 52).
  • the flat ribbon 52 differs from the knit ribbon in that it does not have any holes in its surface through which a fluid can pass.
  • the heat exchange element 3 is produced in the same manner as in the first embodiment, except that the second ribbon 30 is a flat ribbon 52 .
  • the same metal material as the knit ribbon is used for the flat ribbon 52.
  • the thickness of the flat ribbon 52 is set to 0.3 to 0.4 mm.
  • the knit ribbon 41 (wavy knit ribbon 43) is wound around the axial portion 13 of the heat exchange element 3.
  • the knit ribbon 41 constituting the axial portion 13 and the knit ribbon 41 constituting the intermediate portion 14 are continuous, but they may be discontinuous.
  • the ribbon constituting the axial portion 13 and the ribbon constituting the intermediate portion 14 may have different shapes.
  • the axial portion 13 may be composed of a flat knit ribbon 42 as shown in FIG. 4, and the intermediate portion 14 may be composed of a wavy knit ribbon 43 and a flat ribbon 52.
  • a heat exchange element 3 in which the second ribbon 30 is composed of a flat ribbon 52 fluid cannot move in the inner or outer radial direction of the heat exchange element 2 through the first ribbon 20.
  • the heat exchange element 3 allows fluid to move in the circumferential direction between adjacent second ribbons 30, 30.
  • the first ribbon 20 is made of the knit ribbon 41, so the contact area between the fluid and the heat exchange element 3 can be increased, making it possible to efficiently cool high-temperature fluid.
  • the amount of metal wire used in the heat exchange element is increased compared to the case in which only the flat band-shaped second ribbon 30 is made of knit ribbon (second embodiment), improving the cooling efficiency of the high-temperature fluid.
  • the knit ribbon 41 may be made from a tubular knit made by knitting together multiple single continuous metal wires WA, WA.... "Multiple stranded knitting” means knitting together a metal wire WB made by gathering together multiple continuous metal wires WA, WA... in a bundle.
  • the metal wires WB do not necessarily need to be twisted together. If the metal wire WB is not a twisted wire, fluid may flow between the gathered metal wires WA, WA....
  • Fig. 6(a) shows a flat knit ribbon 42 produced by knitting a tubular knit using a metal wire WB formed by bundling two metal wires together, and then compressing the tubular knit.
  • Fig. 6(b) shows a corrugated knit ribbon 43 produced by further processing the flat knit ribbon 42 into a corrugated shape.
  • the flat knit ribbon 42 shown in Fig. 6(a) has two knit layers.
  • the corrugated knit ribbon 43 shown in Fig. 6(b) is an example in which the flat knit ribbon 42 shown in Fig. 6(a) is further folded in half at a crease perpendicular to its longitudinal direction and then processed into a corrugated plate shape, and has four knit layers.
  • the density of the metal wire in the knit ribbon can be improved, and the cooling performance can be further improved.
  • FIGS. 7(a) and (b) are diagrams showing modified examples of the corrugated ribbon.
  • the concave stripes 21 (convex stripes 22) of the corrugated first ribbon 20 are perpendicular to the longitudinal direction of the ribbon, but the angle of the concave stripes with respect to the longitudinal direction of the ribbon is not limited to this.
  • the concave stripes of the corrugated ribbon may extend in a direction intersecting with the longitudinal direction of the ribbon.
  • 7(a) includes linear concave stripes 21 (convex stripes 22) inclined at an angle ⁇ with respect to a reference line L2 that is perpendicular to a reference line L1 that extends along the longitudinal direction of the first ribbon 20.
  • FIG. 7B shows the first ribbon 20 in which the extension direction of the concave stripe 21 (convex stripe 22) changes in the middle part of the short side direction of the first ribbon 20.
  • the concave stripe 21 (convex stripe 22) shown in the figure is bent in the middle part of the short side direction of the first ribbon 20.
  • the concave stripe 21a (convex stripe 22a) part extending from one end of the short side direction of the first ribbon 20 toward the middle part extends linearly at an angle ⁇ with respect to the reference line L2.
  • the concave stripe 21b (convex stripe 22b) part extending from the other end of the short side direction of the first ribbon 20 toward the middle part extends linearly at an angle ⁇ with respect to the reference line L2.
  • the angles ⁇ and ⁇ may be the same or different.
  • the first ribbon 20 may have an axisymmetric shape with the reference line L1 extending along its longitudinal direction as the axis of symmetry.
  • the concave stripes 21 (convex stripes 22) of the first ribbon 20 may be curved from one end to the other end in the short side direction of the first ribbon 20.
  • the concave stripes 21 (convex stripes 22) of the first ribbon 20 may be wavy. In either case, the grooves 21, 21 . . . and the protrusions 22, 22 .
  • the first ribbon 20 shown in Figures 7(a) and (b) can be produced using the forming device 100 shown in Figure 3.
  • the gear rollers 101, 101 of the forming device 100 have helical gear teeth or lobe-shaped gear teeth according to the shapes of the concave stripes 21 and the convex stripes 22.
  • both the first ribbon and the second ribbon may be corrugated ribbons.
  • 8(a) and (b) are diagrams showing an example of a combination of corrugated ribbons.
  • the same reference numerals are used for the same members as in the first embodiment, and the description thereof will be omitted as appropriate.
  • At least one of the first ribbon 20 and the second ribbon 30 is made of a knitted ribbon made by braiding metal wires.
  • the first ribbon 20 has a shape in which concave ribs 21 and convex ribs 22 extending in a direction intersecting with the longitudinal direction thereof are repeated along the longitudinal direction of the first ribbon 20.
  • the second ribbon 30 has a shape in which concave ribs 31 and convex ribs 32 extending in a direction intersecting with the longitudinal direction thereof are repeated along the longitudinal direction of the second ribbon 30.
  • the first ribbon 20 and the second ribbon 30 are overlapped and wound such that the convex ribs 32 of the second ribbon 30 do not fit into the concave ribs 21 of the first ribbon 20, and such that the convex ribs 22 of the first ribbon 20 do not fit into the concave ribs 31 of the second ribbon 30.
  • the first ribbon 20 and the second ribbon 30 may have different combinations of angles, bending patterns, or curved patterns of the concave ribs 21, 31 (convex ribs 22, 32) relative to the reference line L2.
  • FIG. 8(a) shows an example in which the concave ridges 21..., 31... (convex ridges 22..., 32...) of each ribbon are inclined at an angle of ⁇ with respect to the reference line L2. That is, FIG. 8(a) shows an example in which ribbons 20, 30 of the same shape are flipped over and stacked.
  • Combinations with different angles of concave ridges and convex ridges include cases in which the concave ridges 21..., 31... (convex ridges 22..., 32...) of each ribbon 20, 30 are inclined at different angles in the same direction with respect to the reference line L2, and cases in which they are inclined at different angles in different directions.
  • ribbons 20 and 30 having a plurality of generally V-shaped concave streaks 21..., 31... (convex streaks 22..., 32...) in a plan view can be stacked together.
  • the concave streaks 21a (convex streaks 22a) of the first ribbon 20 and the concave streaks 31a (convex streaks 32a) of the second ribbon 30 are each inclined by an angle of ⁇ with respect to the reference line L2
  • the concave streaks 21b (convex streaks 22b) of the first ribbon 20 and the concave streaks 31b (convex streaks 32b) of the second ribbon 30 are each inclined by an angle of ⁇ with respect to the reference line L2.
  • ribbons 20 and 30 of the same shape can be stacked by flipping them over.
  • the combination of ribbons 20 and 30 is not limited to this.
  • the shape of the cells 11 can be made complex.
  • the cells can have a shape that is not parallel to the axis Ax of the heat exchange element.
  • the cells can have a shape in which the cross-sectional shape (the shape in a cross section perpendicular to the axis Ax of the heat exchange element) changes depending on the axial position of the heat exchange element.
  • Fifth embodiment 9(a) and (b) are diagrams showing modified examples of the wavy ribbon in actual photographs, where (a) is a diagram showing a photograph of the ribbon taken from a plan view direction, and (b) is a diagram showing a photograph of the ribbon taken from an oblique direction.
  • Fig. 10 is a schematic perspective view showing the ribbon corresponding to Fig. 9.
  • the wavy knit ribbon 43B (knit ribbon 41) shown in FIG. 9 has at least one uneven portion 60 (61-63) in which concave and convex stripes 44 and 45 extending in a direction intersecting the longitudinal direction (first direction, in this example, the lateral direction perpendicular to the longitudinal direction) are alternately repeated along the longitudinal direction (second direction).
  • the wavy knit ribbon 43B in this example has three uneven portions 60 (first to third uneven portions 61-63) each arranged at a different position in the lateral direction.
  • Each uneven portion 60 has a shape in which concave and convex stripes 44 and 45 are repeated over the entire longitudinal direction of the ribbon.
  • the wavy knit ribbon 43B has a filter section 70 (71, 72) between two adjacent uneven sections 60, 60 in the short side direction.
  • the wavy knit ribbon 43B has a first uneven section 61 arranged at one position in the short side direction, a second uneven section 62 arranged at another position in the short side direction, and a filter section 71 arranged between the first and second uneven sections 61, 62 adjacent to each other.
  • the filter portion 70 is formed by protruding the knit ribbon 41 in the opposite direction to the concave direction of the concave stripes 44 near one end of the extension direction of the concave stripes 44, and includes a wall portion 75 rising from the surface of the knit ribbon 41.
  • the wall portion 75 is disposed on an extension of the concave stripes 44.
  • Each groove 44 of the corrugated knit ribbon 43B forms a cell 11 (see FIG. 1, etc.) in the heat exchange element.
  • the cell 11 (groove 44) functions as a flow path for passing a fluid in the extending direction of the groove 44.
  • the filter portion 70 exerts a filtering function of removing foreign matter from the fluid flowing through the grooves 44.
  • the mesh size (coarseness) of the filter portion 70 is appropriately set based on the size (coarseness) of the mesh (loop) of the knit ribbon and the thickness and number of the metal wires constituting the metal wire rod W, etc.
  • the filter section 70 separates the grooves 44 of two adjacent uneven sections 60, 60 in the short-side direction of the wavy knit ribbon 43B.
  • the filter section 70 makes the flow paths formed by the grooves 44 discontinuous in the short-side direction of the wavy knit ribbon 43B. In order to filter the entire fluid flowing through the grooves 44, it is desirable that the entire internal space of the cell 11 is projected onto the wall section 75 arranged on the extension of the cell 11.
  • the concave-convex periods of the two concave-convex portions 60, 60 adjacent to each other via the filter portion 70 are the same. Furthermore, the concave stripes 44 and the convex stripes 45 of the two concave-convex portions 60, 60 are arranged with a shifted pitch in the longitudinal direction of the ribbon. In this example, the concave stripes 44 and the convex stripes 45 are arranged with a 1/2 pitch shift.
  • the concave stripes 44 of the first concave-convex shaped portion 61 are arranged on an extension of the convex stripes 45 of the second concave-convex shaped portion 62, and the convex stripes 45 of the first concave-convex shaped portion 61 are arranged on an extension of the concave stripes 44 of the second concave-convex shaped portion 62.
  • the extension direction is the extending direction of the concave stripes (and the convex stripes). The same applies to the relationship between the second concave-convex shaped portion 62 and the third concave-convex shaped portion 63.
  • the wall portion 75 located between adjacent concave ribs 44 and convex ribs 45 in the short direction of the wavy knit ribbon 43B connects the surface on one side (upper side in Figure 10) of the concave ribs 44 that are recessed (downward in Figure 10) into one side of the wavy knit ribbon 43B so that it is continuous with the surface on one side (upper side in Figure 10) of the convex ribs 45 that protrude (upward in Figure 10) into one side of the wavy knit ribbon 43B.
  • the wall portion 75 is an inclined surface that is inclined with respect to an imaginary plane defined by the long direction and short direction of the wavy knit ribbon 43B.
  • the filter section 70 is disposed between one of the concave ribs 44 and the other of the two unevenly shaped sections 61, 62 (62, 63). Therefore, the fluid flowing in the concave ribs 44 along the extension direction of the concave ribs 44 on one side of the wavy knit ribbon 43B (arrow A1 in the figure) passes through the filter section 71 (wall section 75) and flows out to the other side of the wavy knit ribbon 43B, and flows in the concave ribs 44 along the extension direction of the concave ribs 44 on the other side of the wavy knit ribbon 43B (arrow A2 in the figure).
  • the fluid that flows out to the other side of the wavy knit ribbon 43B passes through the filter section 72 (wall section 75) and flows out to one side of the wavy knit ribbon 43B (arrow A3 in the figure).
  • the flow paths formed on one side and the other side of the wavy knit ribbon 43B by the concave ribs 44 and the convex ribs 45 that belong to different concave and convex shaped portions 60 and are adjacent in the short direction of the wavy knit ribbon 43B are connected via the filter portion 70.
  • the filter unit 70 is configured to allow the fluid flowing through the grooves 44 to pass from one side to the other side of the knit ribbon 41.
  • the filter unit 70 is configured to allow the fluid flowing through the grooves 44 to pass in the direction of the thickness t of the knit ribbon 41.
  • the thickness t here is a thickness that can be defined based on the knit ribbon 41 before it is deformed into a wavy shape.
  • the mesh of the knit ribbon 41 is utilized as a filter.
  • the filter unit 70 may be configured to pass a fluid from the one side to the other side immediately after the fluid passes from the one side to the other side.
  • the filter unit 70 may be configured to omit the second uneven portion 62 of the wavy knit ribbon 43B.
  • the filter unit 70 may be configured to have two wall portions 75, 75 arranged adjacent to each other in the short side direction.
  • 11A and 11B are diagrams for explaining a forming apparatus for producing the wavy ribbon shown in FIG. 9, in which (a) is a diagram showing an actual photograph of the forming apparatus, (b) is a plan view of a gear roller, and (c) is a diagram for explaining the position of the gear teeth of the gear roller.
  • the forming device 100B includes a pair of gear rollers 101B, 101B (gear roller pair, forming roller pair).
  • the wavy knit ribbon 43B shown in Figure 9 is produced by inserting the flat knit ribbon 42 ( Figure 2(a)) between the gear rollers 101B, 101B and plastically deforming it.
  • Each gear roller 101B, 101B has first to third molding sections 111 to 113 (first to third gear sections) in order from one end in the axial direction.
  • Each molding section 111 to 113 is a gear section having multiple gear teeth 102 in the circumferential direction, and the first molding sections 111, 111 mesh with each other, the second molding sections 112, 112 mesh with each other, and the third molding sections 113, 113 mesh with each other.
  • Each molding section 111 to 113 creates uneven shaped sections 61 to 63 in the knit ribbon 41.
  • the rotation axes Ax2 of the two gear rollers 101B, 101B are parallel, and the configuration of each molding section 111 to 113 is generally the same as that of the molding device 100 shown in Figure 3.
  • the distance between the gear rollers is set appropriately depending on the thickness of the ribbon to be plastically deformed, etc.
  • Each of the molding portions 111 to 113 shown in the figure is a spur gear, that is, the gear teeth 102 of each of the molding portions 111 to 113 extend along the axial direction of the gear roller 101B.
  • Some or all of the shaping parts in the gear roller 101B may be helical gears whose gear teeth are inclined with respect to the rotation axis Ax2.
  • each shaping part in this example is a spur gear, and that all shaping parts have the same module, the same reference circle (pitch circle), and the same number of teeth in the circumferential direction.
  • Spacers 120, 120 are inserted between the first molding section 111 and the second molding section 112, and between the second molding section 112 and the third molding section 113, and each molding section is arranged with a predetermined gap (spacer section) in the axial direction.
  • Filter sections 70 are produced at positions in the short direction of the flat knit ribbon 42 (FIG. 2(a)) corresponding to each spacer 120.
  • the axial length of the spacer 120 (the size of the spacer) is appropriately set depending on the thickness t of the flat knit ribbon 42 and the rising angle of the wall portion 75 to be produced.
  • the gear roller 101B may be configured to omit some or all of the spacers 120 as necessary.
  • adjacent molding sections are combined so that the positions of the gear teeth 102 are shifted in the circumferential direction.
  • the shift of the gear teeth 102 between the adjacent molding sections is preferably 1/2 pitch in the circumferential direction, but is not limited to this.
  • the wavy knit ribbon has a concave 44 formed by one molding portion and a convex 45 formed by the other molding portion on the extension of the concave 44.
  • a filter portion 70 is created between the concave 44 and the convex 45 (FIG. 9).
  • the side adjacent to the other shaping portion (the side facing the other shaping portion) is provided with a chamfered portion 103 in which an outer peripheral corner of the gear tooth 102 is chamfered (or cut off).
  • the chamfered shape may be an R shape or an angular shape.
  • the mesh size is appropriately suppressed from expanding and deforming in the wavy knit ribbon 43B, and the filter section is provided with a mesh size that can provide the necessary filtering function.
  • the filter section 70 is fabricated in such a way that the concave ribs 44 and the convex ribs 45 adjacent to each other in the short direction of the wavy knit ribbon 43B are gently (or smoothly) connected by an inclined surface.
  • the concave stripes 44 and the convex stripes 45 of the concave-convex portion 60 shown in Figures 9 and 10 may be perpendicular to or inclined from the longitudinal direction of the wavy knit ribbon 43B.
  • a ribbon having the uneven portion 60 and the filter portion 70 may be produced from a flat ribbon 52 (see FIG. 5). In this case, a number of cuts corresponding to the shape after deformation are made in the portion of the flat ribbon where the filter portion 70 is to be formed, and the ribbon is deformed using a forming device shown in FIG. 11. In this way, the filter portion 70 can be produced using the same principle as in the production of expanded metal.
  • the uneven portion 60 and the filter portion 70 may be formed on either of two ribbons to be combined (superimposed).
  • the uneven portion and the filter portion may be disposed on different ribbons, and the two ribbons may be combined so that the fluid passes through the filter portion in the heat exchange element.
  • the heat exchange element may be constructed by manufacturing each ribbon such that the first ribbon 20 includes the concave-convex portion 60 and the second ribbon 30 includes the filter portion 70 as shown in Figures 1, 4, 5, etc., and then overlapping the two ribbons.
  • the first ribbon and the second ribbon are combined such that the filter portion is disposed on an extension of the cells, which is the extending direction of the concave stripes.
  • the number of uneven parts 60 and the number of filter parts 70 in the short direction of the ribbon can be set arbitrarily.
  • the heat exchange element may have at least one uneven part 60 arranged at a portion of the short direction of the ribbon and at least one filter part 70 arranged adjacent to the uneven part.
  • the filter part 70 may be arranged at an end of the short direction of the ribbon.
  • the gear teeth 102 of the two molding sections are arranged so as to be shifted by a predetermined pitch in the circumferential direction at the axial ends of the two molding sections that face each other (adjacent sides) in the direction of the rotation axis Ax2.
  • This allows a filter section 70 (wall section 75) to be created between the concave ribs 44 and convex ribs 45 that are adjacent in the short direction of the ribbon, as shown in FIG. 10, etc.
  • the heat exchange element has a filter function, so that it is possible to perform heat exchange with the fluid passing through the heat exchange element and at the same time remove foreign matter.
  • the pressure loss value can be freely changed by changing the degree to which each concave rib 44 and each convex rib 45 of two adjacent uneven sections 60, 60 are shifted in the longitudinal direction of the ribbon, i.e., by changing the amount of pitch shift between the uneven sections 60, 60.
  • the wavy knit ribbon 43C (knit ribbon 41) includes two uneven portions 60 (first and second uneven portions 61, 62) disposed at different positions in the short side direction, and a filter portion 70 disposed between the uneven portions 61, 62.
  • the uneven portions 61, 62 and the filter portion 70 extend over the entire area of the wavy knit ribbon 43C in the longitudinal direction.
  • the filter section 70 includes a wall section (wall surface) 75 extending parallel to the longitudinal direction of the wavy knit ribbon 43C.
  • the wall section 75 is formed by protruding (or recessing) a portion of the short side of the knit ribbon 41 from the surface of the knit ribbon 41 along the longitudinal direction of the knit ribbon 41.
  • the filter section 70 shown in this example includes a valley section 76 extending parallel to the longitudinal direction of the wavy knit ribbon 43C and facing the wall section 75, and a peak section 77 paired with the valley section 76.
  • wall portion 75 extends in a direction intersecting groove 44 as an extension of groove 44, wall portion 75 functions as a filter that filters the fluid flowing within groove 44 in the direction of arrow B1 in the figure along groove 44 by passing it through as indicated by arrows B2 and B3.
  • Fig. 13 is a plan view of a pair of gear rollers constituting a forming device for producing the wavy ribbon shown in Fig. 12.
  • the same components as those in Fig. 11 are given the same reference numerals and the description thereof will be omitted as appropriate.
  • the forming apparatus 100C includes a pair of gear rollers 101C, 101C (gear roller pair).
  • the wavy knit ribbon 43C is produced by inserting the flat knit ribbon 42 (FIG. 2(a)) between the gear rollers 101C, 101C and plastically deforming it.
  • the gear rollers 101C, 101C are depicted spaced apart in this figure, but in reality, the gear rollers 101C, 101C are positioned at an appropriate distance so that they mesh with each other, as in FIG. 11(a).
  • the gear roller 101C includes, in order from one end in the axial direction, first to third molding portions 111 to 113.
  • the first molding portions 111, 111 of the gear rollers 101C, 101C mesh with each other, the second molding portions 112, 112 of the gear rollers 101C, 101C mesh with each other, and the third molding portions 113, 113 of the gear rollers 101C mesh with each other, respectively.
  • the first molding portion 111 and the third molding portion 113 are portions for producing the uneven portion 60, and have the same configuration as the corresponding portions of the gear roller 101B shown in Fig. 11.
  • the circumferential positions of the gear teeth 102 of the first molding portion 111 and the gear teeth 102 of the third molding portion 113 are the same, but the gear teeth 102, 102 of the first and third molding portions 111, 113 may be arranged with a circumferentially shifted pitch.
  • the second molding section 112 of the gear roller 101C creates the filter section 70 in the wavy knit ribbon 43C.
  • an endless annular protrusion 116 and an annular step portion 117 extending in the circumferential direction are arranged adjacent to each other in the direction of the rotation axis Ax2.
  • the annular protrusion 116 of one gear roller 101C is engaged with the annular step portion 117 of the other gear roller 101C.
  • the outer end of the annular protrusion 116 is located at the same position as the tip of the gear tooth 102, and the inner end of the annular step portion 117 is located at the same position as the bottom of the gear tooth 102.
  • a chamfered portion 103 (see FIG. 11) is provided at an axial end portion on the second molding portion 112 side as required.
  • a spacer 120 is disposed between each of the molding portions 111 to 113 as required.
  • ⁇ Modification> 12 may extend in a direction intersecting with the longitudinal direction of the wavy knit ribbon 43C, so long as the wall portion 75 intersects with the concave stripes 44 and the convex stripes 45 of the uneven portion 60.
  • the wall portion 75 is disposed so as to straddle at least one concave stripe 44 and at least one convex stripe 45 of the uneven portion 60.
  • the filter portion 70 may have a plurality of valleys 76 (peaks 77) in the short side direction.
  • the filter portion 70 may be compressed in the axial direction of the heat exchange element (i.e., in the short side direction of the wavy knit ribbon 43C) during manufacturing of the heat exchange element.
  • the heat exchange element has a filter function, so that it is possible to exchange heat with the fluid passing through the heat exchange element and at the same time remove foreign matter.
  • the pressure loss value can be freely changed by changing the degree to which each concave rib 44 and each convex rib 45 of two adjacent uneven sections 60, 60 are shifted in the longitudinal direction of the ribbon, i.e., by changing the amount of pitch shift between the uneven sections 60, 60.
  • FIG. 14 is a cross-sectional view showing an example of the configuration of the metal wire that constitutes the knit ribbon.
  • the metal wire W (WA) constituting each knit ribbon may be a metal wire having a configuration in which a core wire W1 made of a first metal material is covered with a brazing material W2 made of a second metal material having a lower melting point than the first metal material.
  • the metal wire WA is a copper-plated wire.
  • the heat exchange element using the metal wire WA has a portion where a part of the metal wire WA is joined to another part in the heat exchange element by a melted and solidified second metal material through a predetermined heat treatment process in the manufacturing process.
  • the other part in the heat exchange element is another part of the metal wire WA in the knit ribbon to which the part of the metal wire WA belongs, or a suitable place of the ribbon to which the metal wire WA does not belong, or another part.
  • the core wire W1 of the metal wire WA can be made of iron, and the brazing material W2 can be made of copper.
  • Other combinations of metal materials include the core wire W1 made of iron and the brazing material W2 made of nickel, and still other combinations include the core wire W1 made of copper and the brazing material W2 made of tin.
  • the metal wire WA can be produced by plating the core wire W1 with the second metal material, or by coating the periphery of the core wire W1 with the second metal material using other methods.
  • the heat exchange element is heat-treated during the manufacturing process. That is, for example, a molded body molded into a roughly disk shape as shown in Figs. 1, 4, and 5 as heat exchange elements 1, 2, and 3 is temporarily fixed at the ribbon end 16 in some way. After that, this molded body is heat-treated under predetermined conditions to be completed as a heat exchange element.
  • the heat treatment conditions are set so that the brazing material can be melted without deforming (or changing) the core wire, and the molten brazing material spreads between a portion of the metal wire and other portions in the heat exchange element, and then is cooled and solidified, so that the brazing material joins the various portions.
  • the heat treatment temperature can be set to a temperature equal to or higher than the melting point of the brazing material and lower than the sintering temperature of the core wire, and the time for which the temperature is maintained can be about 10 to 12 minutes.
  • the parts in contact with the metal wire can be fixed and integrated.
  • the fixed and integrated parts are distributed throughout the heat exchange element, so the heat exchange element can have high strength overall.
  • the shape retention of the heat exchange element is improved, so the handleability of the heat exchange element is improved. Problems such as damage to the heat exchange element during handling can be prevented.
  • This embodiment relates to a substantially plate-like or columnar heat exchange element 1, 2, 3 in which one surface of a first ribbon 20 having a first configuration and one surface of a second ribbon 30 having a second configuration different from the first configuration are superimposed on each other and spirally wound so that the longitudinal direction of each ribbon extends in the circumferential direction.
  • At least one of the first ribbon and the second ribbon in the heat exchange element is characterized in that it is composed of a knit ribbon 41 made by knitting metal wire W.
  • the first form may be a corrugated plate having a plurality of recesses 21 and protrusions 22 repeated along the longitudinal direction of the ribbon.
  • the second form may be a flat band-like form.
  • the second form may also be a corrugated plate.
  • a complex flow path can be formed inside the heat exchange element.
  • an increase in pressure loss can be suppressed.
  • the contact area between the fluid and the heat exchange element can be increased, so that heat exchange between the fluid and the heat exchange element can be efficiently performed.
  • the knit ribbon 41 is characterized in that it has a configuration in which the opposing inner diameter surfaces of the tubular knit 40 formed by circularly knitting metal wire W are crushed so as to be in close contact with each other.
  • the metal wire is braided in a spiral shape, which improves the production efficiency of the knit ribbon. Since the knit ribbon has two or more layers, the thickness of the knit ribbon can be ensured, and the fluid permeability can be improved. In particular, when a single tubular knit is crushed to form a knit ribbon having two layers, it is easy to control the shape of the knit ribbon to a constant value.
  • the heat exchange elements 1, 2, and 3 according to this embodiment are characterized in that only the knit ribbon 41 (42, 43) is wound around the end portion (axial center portion 13) on the winding start side.
  • using a knitted ribbon that is thicker than these reduces the number of times the ribbon is wound around the axial core due to the ribbon's thickness, and also makes it easier to ensure fluid flow even at the end where the winding begins.
  • This aspect relates to roughly plate-like or roughly columnar heat exchange elements 1, 2, and 3 in which one surface of a first ribbon 20 having a first configuration and one surface of a second ribbon 30 having a second configuration different from the first configuration are superimposed on each other and spirally wound so that the longitudinal direction of each ribbon extends in the circumferential direction.
  • At least one of the first ribbon and the second ribbon in the heat exchange element has a flow path (space) within its wall thickness that allows a fluid to pass in the short direction of the ribbon.
  • the heat exchange element is used so that the fluid moves in the axial direction of the heat exchange element.
  • the short side direction of the ribbon is the axial direction of the heat exchange element. If the ribbon has a flow path within its thickness, heat exchange with the fluid is possible at a location other than the cells located between the first ribbon and the second ribbon. Therefore, the heat exchange efficiency is improved.
  • the heat exchange elements 1, 2, and 3 of this embodiment are characterized in that at the end on the winding start side, only the first ribbon 20 and the second ribbon 30 that have a flow path within their thickness that allows fluid to pass in the short direction are wound around them.
  • using a ribbon that is thicker than these reduces the number of times the ribbon needs to be wound around the axial core due to the thickness of the ribbon, and also makes it easier to ensure fluid flow even at the end where the winding begins.
  • the first ribbon 20 has a shape in which concave ribs 21 and convex ribs 22 extending in a direction intersecting the longitudinal direction are repeated along the longitudinal direction, and between adjacent first and second ribbons 30, a plurality of cells 11 are formed by each concave rib and second ribbon, which allow fluid to pass from one side to the other in the axial direction of the heat exchange element along the concave ribs.
  • the fluid passes through the cells, it comes into contact with the first ribbon and the second ribbon and exchanges heat with them.
  • the ribbon has openings in its surface, such as a knitted ribbon, the fluid flows between adjacent cells through the ribbon. As the fluid flows through the ribbon, it exchanges heat with the ribbon.
  • the heat exchange element according to this embodiment is characterized in that the extending direction of the grooves 21 and the protrusions 22 changes in the intermediate portion in the short side direction of the first ribbon 20 (FIG. 7(b)). According to this aspect, it becomes easier to introduce fluid into the knit ribbon, improving heat exchange efficiency.
  • This embodiment is a generally flat or columnar heat exchange element in which one surface of the first ribbon 20 and one surface of the second ribbon 30 are overlapped and wound in a spiral shape so that the longitudinal direction of each ribbon extends in the circumferential direction.
  • at least one of the first ribbon and the second ribbon is composed of a knit ribbon 41 made by knitting metal wire W
  • the first ribbon and the second ribbon have a shape in which concave stripes (21, 31) and convex stripes (22, 32) extending in a direction intersecting the longitudinal direction are repeated along the longitudinal direction, and both ribbons are overlapped such that the concave stripes 21 (31) of one of the first ribbon and the second ribbon and the convex stripes 32 (22) of the other of the first ribbon and the second ribbon do not fit into the concave stripes 21 (31) of the other of the first ribbon and the second ribbon.
  • both the first ribbon and the second ribbon are corrugated ribbons
  • the knit ribbon 41 is characterized in that it has a configuration in which the opposing inner diameter surfaces of the tubular knit 40 formed by circularly knitting metal wire W are pressed together so as to be in close contact with each other.
  • the metal wire is braided in a spiral shape, which improves the production efficiency of the knit ribbon. Since the knit ribbon has two or more layers, the thickness of the knit ribbon can be ensured, and the fluid permeability can be improved. In particular, when a single tubular knit is crushed to form a knit ribbon having two layers, it is easy to control the shape of the knit ribbon to a constant value.
  • the heat exchange element according to this embodiment is characterized in that only the knit ribbon is wound around the end portion on the winding start side. Compared to using a flat metal plate or corrugated metal plate to make the axial core, using a knitted ribbon that is thicker than these improves formability due to the thickness of the ribbon, reduces the number of times the ribbon is wound, and ensures fluid flow even at the end on the winding start side.
  • This aspect is a heat exchange element 1, 2, 3 comprising a first member (first ribbon 20) having a first form and a second member (second ribbon 30) having a second form and a surface overlapping with one side of the first member, the heat exchange elements 1, 2, 3 being layered such that one side of the first member faces the surface of the second member.
  • the first member is composed of a knit member (knit ribbon 41) made by knitting metal wire W, and the knit member has a configuration in which the opposing inner diameter surfaces of the tubular knit 40 made of circularly knitted metal wire are pressed together so as to be in close contact with each other.
  • the first member may be a flat ribbon (or a flat sheet) or a corrugated ribbon (or a corrugated sheet).
  • the second member only needs to have a surface on which the first member can be placed so that heat can be transferred between the first member and the second member.
  • the heat exchange element at least one layer of each of the first member and the second member is provided.
  • the metal wire is braided in a spiral shape
  • the production efficiency of the knitted member is improved. Since the knitted member has two or more layers, the thickness of the knitted member can be ensured, and the fluid permeability is improved. In particular, when a knitted member having two layers is formed by squeezing a single tubular knit, the shape of the knitted member can be easily controlled to a constant value.
  • This embodiment relates to roughly flat or roughly columnar heat exchange elements 1 to 3 in which one surface of a first ribbon 20 having a first form is overlapped with one surface of a second ribbon 30 having a second form different from the first form, and the ribbons are wound in a spiral shape such that the longitudinal direction of each ribbon extends in the circumferential direction.
  • At least one of the first ribbon and the second ribbon is composed of a knit ribbon 41 made by knitting metal wires W.
  • At least the first ribbon has an uneven portion 60 in which concave and convex stripes 44 and 45 extending in a direction intersecting the longitudinal direction are repeated along the longitudinal direction.
  • a plurality of cells 11 are formed between the adjacent first and second ribbons in the heat exchange element by each of the concave stripes and the second ribbon.
  • the heat exchange element is characterized by comprising a filter portion 70 formed from the first ribbon or the second ribbon on the extension of the cells along the extending direction of the grooves.
  • the ribbon including the filter portion may be made of a knit ribbon or a flat or band-shaped metal ribbon, and the uneven portion and the filter portion may belong to the same ribbon or different ribbons.
  • the filter section may have various shapes.
  • the filter section may have wall sections 75 that rise alternately from each surface of the ribbon at the same pitch (period) as the concave-convex section so as to individually block each flow path formed by each groove of the concave-convex section (FIGS. 9 and 10).
  • the filter section may also be configured to span multiple grooves of the concave-convex section and block multiple flow paths collectively (FIG. 12).
  • the extension direction of the filter section (wall section) may be perpendicular to the grooves of the concave-convex section or inclined.
  • Conventional heat exchange elements have a heat exchange function for the fluid passing through them, but do not have a sufficient filtering function.
  • Methods for removing foreign matter smaller than the cross-sectional shape of the cells (the shape of the cross section in the direction perpendicular to the extension direction of the cells) from the fluid include, for example, arranging a filter adjacent to the heat exchange element or inserting a filter into each cell.
  • the former method increases the size of the entire heat exchanger including the heat exchange element and the filter, and the latter method may lead to a complicated manufacturing process.
  • the heat exchange element since the heat exchange element has a filtering function, it is possible to simultaneously exchange heat with the fluid passing through the heat exchange element and remove foreign matter. Since the filter portion is formed in the ribbon itself, the heat exchange element does not become large even if it has both a heat exchange function and a filtering function, and is easy to manufacture.
  • the first ribbon 20 is a knit ribbon (wavy knit ribbon 43B, 43C), and the filter portion 70 is formed from the first ribbon.
  • the uneven portion 60 and the filter portion belong to the same knit ribbon. Since the filter portion is made in the knit ribbon, the filter portion can easily have a mesh size that provides the necessary filtering function. In addition, since the knit ribbon is easily deformed, both the uneven portion and the filter portion can be easily made.
  • the filter section 70 is characterized in that it is configured to have a portion that allows the fluid to pass from one side of the first ribbon 20 to the other side.
  • the first ribbon includes an uneven portion 60 and a filter portion.
  • the filter portion allows the fluid to pass through in the thickness t direction of the ribbon (FIG. 10, etc.).
  • the mesh of the knit can be used to filter the fluid.
  • the filter portion 70 is characterized in that at one end of the extension direction of each groove 44, a first ribbon protrudes in the opposite direction to the concave direction of each groove.
  • the filter section includes wall portions 75 that rise in the opposite direction to the concave direction of the grooves on the extension of each groove.
  • the wall portions can be shaped to rise alternately from one side and the other side of the first ribbon at the same pitch as the concave-convex portion.
  • the first ribbon includes wall portions that correspond one-to-one to each of the grooves arranged on the one side and the other side of the first ribbon. In this way, the fluid flowing through the grooves (cells 11) can be reliably filtered.
  • the first ribbon is a corrugated knit ribbon, it is easy to create a shape in which the concave-convex portion and the filter portion rise up alternately in opposite directions.
  • the first ribbon 20 (wavy knit ribbon 43B) has a first uneven portion 61 arranged in one portion in the short side direction, a second uneven portion 62 arranged in another portion in the short side direction, and a filter portion 70 (71) adjacent to the first and second uneven portions and arranged between the two uneven portions.
  • the concave stripes 44 of one uneven portion are arranged on an extension of the convex stripes 45 of the other uneven portion
  • the filter portion is characterized by having a wall portion 75 that connects the surface of the concave stripes on one side of the first ribbon to the surface of the convex stripes on the one side adjacent to the concave stripes on the extension of the concave stripes so that the surface is continuous.
  • the wall portion is, for example, an inclined surface.
  • the flow paths adjacent in the short side direction of the first ribbon referred to here are the flow paths formed on one side of the first ribbon by the concave stripes located on said one side, and the flow paths formed on the other side of the first ribbon by the concave stripes on the opposite side of the convex stripes located on the one side of the first ribbon, which are an extension of the concave stripes.
  • the metal wire WA constituting the knit ribbon 41 has a configuration in which a core wire W1 made of a first metal material is coated with a solder material W2 made of a second metal material having a lower melting point than the first metal material.
  • the heat exchange element is characterized in that it has a portion where a part of the metal wire is joined to another portion of the heat exchange element by the melted and solidified second metal material.
  • the shape of the heat exchange element can be maintained by fixing only the end of the ribbon or by winding a wire around the outer periphery.
  • the parts in contact with the metal wire can be fixed and integrated. Since the fixed and integrated parts are distributed throughout the heat exchange element, the heat exchange element can be strengthened as a whole. The shape retention of the heat exchange element is improved, so the handleability of the heat exchange element is improved. Problems such as damage to the heat exchange element during handling can be prevented.
  • This embodiment is a ribbon forming device 100B equipped with a pair of forming rollers (gear rollers 101B, 101B) that plastically deforms a metal ribbon into a predetermined shape.
  • the pair of forming rollers includes a first forming portion 111 and a second forming portion 112 arranged adjacent to each other with a predetermined gap (spacer 120) therebetween in the axial direction.
  • the first and second molding portions are spur gears or helical gears having the same number of gear teeth 102 in the circumferential direction, and the gear teeth of the first and second molding portions are offset from each other in the circumferential direction.
  • the metal ribbon to be plastically deformed is preferably a knit ribbon 41 (FIG.
  • the ribbon forming device 100B of this embodiment is characterized in that it has a chamfered portion 103 in which the corners of the ends of each gear tooth 102 of the first and second forming portions 111, 112 in the direction of the rotation axis Ax2 are chamfered on the side adjacent to the other forming portion.
  • a chamfered portion 103 in which the corners of the ends of each gear tooth 102 of the first and second forming portions 111, 112 in the direction of the rotation axis Ax2 are chamfered on the side adjacent to the other forming portion.

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  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention concerne un nouvel élément d'échange de chaleur qui présente une efficacité d'échange de chaleur améliorée grâce à l'augmentation de la zone de surface d'élément qui vient en contact avec un fluide. La présente invention concerne un élément d'échange de chaleur généralement plan ou généralement colonnaire 1, 2, 3 qui est obtenu par enroulement d'un premier ruban 20 ayant une première forme qui est une forme de plaque ondulée et un second ruban 30 ayant une seconde forme qui est une forme de plaque plate, et est différent de la première forme, en une forme en spirale de telle sorte que les directions longitudinales des rubans s'étendent dans la direction périphérique, une surface du premier ruban 20 et une surface du second ruban 30 étant superposées l'une sur l'autre. Au moins l'un parmi le premier ruban et le second ruban de l'élément d'échange de chaleur est conçu à partir d'un ruban tricoté 41 qui est obtenu par tricotage d'une tige de fil métallique W.
PCT/JP2023/034572 2022-12-23 2023-09-22 Élément d'échange de chaleur et appareil de moulage de ruban Ceased WO2024135024A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2022-207047 2022-12-23
JP2022207047 2022-12-23
JP2023-119794 2023-07-24
JP2023119794A JP2024091248A (ja) 2022-12-23 2023-07-24 熱交換素子

Publications (1)

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WO2024135024A1 true WO2024135024A1 (fr) 2024-06-27

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WO (1) WO2024135024A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909730A (en) * 1989-01-23 1990-03-20 Westech Industrial Ltd. Flame arrester having detonation-attenuating means
JP2000226203A (ja) * 1999-02-05 2000-08-15 Fuji Electric Co Ltd オゾン発生装置
JP3077453U (ja) * 2000-11-02 2001-05-18 金子産業株式会社 フレームアレスター
US20010011529A1 (en) * 1995-04-04 2001-08-09 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
JP2001241620A (ja) * 2000-02-28 2001-09-07 Yamazen:Kk 燃焼脱臭装置
JP2009000671A (ja) * 2007-05-18 2009-01-08 Hiroshi Matsuoka 排気ガス浄化触媒用担体構造
US20120273239A1 (en) * 2011-04-28 2012-11-01 Brennan Susan Flame trap cartridge, flame arrestor, method of preventing flame propagation into a fuel tank and method of operating an aircraft
US20180264300A1 (en) * 2014-10-03 2018-09-20 Elmac Technologies Limited Flame arresters
CN215637225U (zh) * 2021-05-31 2022-01-25 广东熙霖节能环保工程咨询服务有限公司 一种废气催化燃烧系统配套的阻火器

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909730A (en) * 1989-01-23 1990-03-20 Westech Industrial Ltd. Flame arrester having detonation-attenuating means
US20010011529A1 (en) * 1995-04-04 2001-08-09 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
JP2000226203A (ja) * 1999-02-05 2000-08-15 Fuji Electric Co Ltd オゾン発生装置
JP2001241620A (ja) * 2000-02-28 2001-09-07 Yamazen:Kk 燃焼脱臭装置
JP3077453U (ja) * 2000-11-02 2001-05-18 金子産業株式会社 フレームアレスター
JP2009000671A (ja) * 2007-05-18 2009-01-08 Hiroshi Matsuoka 排気ガス浄化触媒用担体構造
US20120273239A1 (en) * 2011-04-28 2012-11-01 Brennan Susan Flame trap cartridge, flame arrestor, method of preventing flame propagation into a fuel tank and method of operating an aircraft
US20180264300A1 (en) * 2014-10-03 2018-09-20 Elmac Technologies Limited Flame arresters
CN215637225U (zh) * 2021-05-31 2022-01-25 广东熙霖节能环保工程咨询服务有限公司 一种废气催化燃烧系统配套的阻火器

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