EP3104109B1 - Platte zur verwendung als wärmetauscherplatte und verfahren zur herstellung solch einer platte - Google Patents

Platte zur verwendung als wärmetauscherplatte und verfahren zur herstellung solch einer platte Download PDF

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Publication number
EP3104109B1
EP3104109B1 EP15755314.0A EP15755314A EP3104109B1 EP 3104109 B1 EP3104109 B1 EP 3104109B1 EP 15755314 A EP15755314 A EP 15755314A EP 3104109 B1 EP3104109 B1 EP 3104109B1
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EP
European Patent Office
Prior art keywords
plate
projections
width
ridges
heat
Prior art date
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Application number
EP15755314.0A
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English (en)
French (fr)
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EP3104109A8 (de
EP3104109A1 (de
EP3104109A4 (de
Inventor
Keitaro Tamura
Yasuyuki Fujii
Yoshio Itsumi
Hideto Oyama
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Kobe Steel Ltd
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Kobe Steel Ltd
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Publication date
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Priority to PL15755314T priority Critical patent/PL3104109T3/pl
Publication of EP3104109A1 publication Critical patent/EP3104109A1/de
Publication of EP3104109A8 publication Critical patent/EP3104109A8/de
Publication of EP3104109A4 publication Critical patent/EP3104109A4/de
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Publication of EP3104109B1 publication Critical patent/EP3104109B1/de
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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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/04—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
    • 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
    • F28F3/048—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 ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/086—Heat exchange elements made from metals or metal alloys from titanium or titanium alloys
    • 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
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/08—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes pressed; stamped; deep-drawn

Definitions

  • the present invention relates to a plate for use as heat-exchanging plate and to a method for producing the plate.
  • Patent Literature 1 and Patent Literature 2 disclose the following technologies as methods for transferring micron-order fine irregularities onto the surface of a plate.
  • Patent Literature 1 The method for transfer onto a metal plate surface disclosed in Patent Literature 1 involves pressing a transfer portion having irregularities, which has been transferred to the outer peripheral face of transfer rolls, against a metal sheet that is transported by transport rolls. In this method, transferred portions of irregular shape identical to those of the transfer portions of the transfer rolls become formed on the surface of the metal sheet.
  • a plate of a heat-exchanging plate disclosed in Patent Literature 2 is a plate for a heat-exchanging plate, the plate being constituted by a titanium-made flat plate having fine irregularities formed on the surface, and being obtained through press working, as a post-process, of the flat plate.
  • the irregularities on the surface thereof are set in such a manner that a shape parameter defined as height ( ⁇ m) of projections ⁇ [width ( ⁇ m) of recesses / pitch ( ⁇ m) between adjacent projections / angle (deg) of projections] is 0.94 or smaller.
  • the heat-exchanging plate has enhanced heat transfer properties by virtue of the increased surface area achieved through formation of micron-order fine irregularities on the surface of the flat plate.
  • plates (flat plate) having fine irregularities formed on the surface are rarely used as they are (i.e. with irregularities remaining thereon), as heat-exchanging plates.
  • a plurality of projections having a height ranging from several mm to several cm is formed by press working on the surface of the heat-exchanging plate.
  • the fine irregularities formed on the surface of the plate for the heat-exchanging plate are flattened during press working. It is accordingly desirable to enhance the press formability of the plate.
  • Patent Literature 2 discloses a technology for solving the issue of press formability of the above plates.
  • press formability of the plate is enhanced by defining a shape parameter of the irregularities that are formed on the surface of the heat-exchanging plate.
  • the projections formed on the plate promote turbulence and forced convection, to thereby enhance condensation thermal transfer.
  • the condensation thermal transfer achieved by the heat-exchanging plate is significantly affected by the discharge of the generated liquid.
  • the effect of discharge of the generated liquid may in some instances be weaker than expected (i.e. smaller discharge amount of generated liquid), since the generated liquid spreads out on account of surface tension. Heat transfer properties in a condensation thermal transfer process are thus hard to enhance in the plate formed using the technology of Patent Literature 2.
  • the turbulence-promoting effect in the heat-exchanging plate may in some instances be weaker than expected on account of the low height and divided shape (i.e. not a shape of contiguous projections) of the uneven shape that is formed according to the technology of Patent Literature 2.
  • the uneven shape of Patent Literature 2 moreover, the contact surface area with a medium during condensation of a gas into liquid is small due to the liquid film that forms in the condensation process, and thus the effect of promoting condensation thermal transfer may be weaker than expected.
  • the heat-transfer performance of the heat-exchanging plate that is built into the heat exchanger is lowered by the liquid film that is generated when the heat exchanger is operated.
  • the design of the plate must ensure that the generated liquid film is discharged with good efficiency and that the film is thin.
  • Patent Literature 3 reveals a heat exchanger plate made of metal, provided with a secondary pattern.
  • the heat exchanger plate is additionally provided with a primary pattern impressed on the secondary pattern wherein the primary pattern includes a plurality of first and second ridges formed into V-shapes by the first ridges and the second ridges.
  • the step of impressing the primary and secondary patterns onto the material may be a stamping operation, a rolling operation, a pressing operation or an embossing operation.
  • the plate for a heat-exchanging plate of the present invention is a plate for a heat-exchanging plate of a condenser, the plate being constituted by a metallic flat plate having irregularities formed on a surface thereof, the heat-exchanging plate being obtained through press-working, which is implemented as a post-process, of the flat plate to yield thereafter the heat-exchanging plate, wherein the irregularities include a plurality of projections that are formed at a predetermined spacing; the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle - ⁇ with respect to the width direction of the plate, the projections being formed into V-shapes by the first ridges and the second ridges, and respective tops being formed at portions at which the ends of the first ridges and the ends of the second ridges intersect each other; the height of the projections is set to be 0.02 mm or greater and 0.1 mm or less; the width of the projections is set to
  • the method for producing a plate for a heat-exchanging plate of the present invention is a method for producing the plate for a heat-exchanging plate of a condenser as defined above, the plate being constituted by a metallic flat plate having irregularities formed on a surface thereof, the heat-exchanging plate being obtained through press-working, which is implemented as a post-process, of the flat plate to yield thereafter the heat-exchanging plate , the method comprising: forming the irregularities on the surface such that the irregularities include a plurality of projections formed at a predetermined spacing; and forming, when forming the irregularities, the plurality of projections such that the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle - ⁇ with respect to the width direction of the plate, the projections are formed into V-shapes by the first ridges and the second ridges, and respective tops are formed at portions at which the ends of the first ridges and the ends
  • a plate 1 for a heat-exchanging plate according to the embodiment of the present invention is constituted by a metallic flat plate (for instance, titanium material) having irregularities formed on the surface.
  • the plate 1 may be subjected to press working, as a post-process, to yield thereafter a heat-exchanging plate (PHE plate).
  • the heat-exchanging plate which exhibits high heat-transfer performance in a condensation thermal transfer process, is built into a heat exchanger or the like.
  • a plurality of projections having for instance a jagged shape generally referred to as herringbone becomes formed on the surface of the heat-exchanging plate through press working of the plate 1.
  • Fig. 1 is a diagram illustrating schematically the uneven shape formed on the plate 1 before yielding the heat-exchanging plate according to the embodiment of the present invention.
  • the up-and-down direction on the paper is taken as the longitudinal direction or length-wise direction of the plate 1, and the left-right direction on the paper as the width direction of the plate 1.
  • Fig. 2 is a plan-view diagram (enlarged-view diagram of portion A of Fig. 1 ) illustrating the shape of projections 2 formed on the plate 1.
  • Fig. 3 is a cross-sectional diagram along line III-III in Fig. 2 .
  • irregularities are formed on the surface 1a of the plate before yielding the heat-exchanging plate according to the embodiment of the present invention.
  • the irregularities have a plurality of projections 2 that are formed at a predetermined spacing.
  • the spaces between the plurality of projections 2 constitute recesses 3.
  • the projections 2 include first ridges 2a and second ridges 2b.
  • the first ridges 2a are disposed at an angle + ⁇ with respect to the width direction of the plate 1. That is, the first ridges 2a extend in a rectilinear fashion in a direction at + ⁇ with respect to the width direction of the plate 1.
  • the second ridges 2b are disposed at an angle - ⁇ with respect to the width direction of the plate 1.
  • the second ridges 2b extend in a rectilinear fashion in a direction at - ⁇ with respect to the width direction of the plate 1.
  • the projections 2 are formed into V-shapes by the first ridges 2a and the second ridges 2b.
  • first ridges 2a and the second ridges 2b are disposed alternately in the width direction of the plate 1.
  • the ridges are formed in such a manner that an extension line from one end of each of the first ridges 2a and an extension line from one end of the second ridges 2b intersect each other.
  • the ridges are formed in such a manner that an extension line from the other end of the first ridges 2a and an extension line from the other end of the second ridges 2b intersect each other.
  • first ridges 2a and the second ridges 2b adjacent thereto in the projections 2 are formed to a V-shape in a plan view, and respective tops 4 are formed at portions at which the ends of the first ridges 2a and the ends of the second ridges 2b intersect each other.
  • first ridges 2a and the second ridges 2b are spaced apart from each other, since as described below a groove portion 5 is formed in the tops 4.
  • the plurality of first ridges 2a is disposed at equal spacings in the longitudinal direction of the plate 1, and the plurality of second ridges 2b is disposed likewise at equal spacings in the longitudinal direction of the plate 1.
  • V-shape in the present embodiment denotes a shape such as that of the cutting edges of saw teeth, in a plan view, i.e. a shape in which ridges oriented in different directions are disposed alternately in a continuous succession.
  • the first ridges 2a extending in a straight line are disposed obliquely with respect to the width direction by the angle + ⁇
  • the second ridges 2b extending in a straight line are disposed obliquely with respect to the width direction by the angle - ⁇ . That is, the leftward and downward first ridges 2a, and the rightward and downward second ridges 2b adjacent to the first ridges 2a are disposed alternately in the width direction of the plate 1.
  • the first ridges 2a are connected to other first ridges 2a via the second ridges 2b
  • the second ridges 2b are connected to other second ridges 2b via the first ridges 2a.
  • the V-shaped projections 2 are formed in plurality that are juxtaposed, in a plan view, at a predetermined spacing in the longitudinal direction of the plate 1.
  • the V-shaped projections 2 are made up of a plurality of side walls erected in the thickness direction of the plate 1, and top walls (top edges) that join the respective side walls.
  • the projections 2 in the present embodiment have been explained as having a substantially rectangular shape in a cross-sectional view, but the projections 2 formed on the surface 1a of the plate 1 may have for instance a substantially trapezoidal shape or substantially angular shape, other than a substantially rectangular shape. That is, the projections 2 may adopt any cross-sectional shape so long as the below-described dimensions of the projections 2 are satisfied.
  • Groove portions 5 are additionally formed in the plate 1 that is used in the heat-exchanging plate according to the present invention. Each groove portion 5 is formed so as to extend along the longitudinal direction of the plate 1, at the tops 4 at which there intersect the first ridges 2a and the second ridges 2b that make up the projections 2.
  • the groove portion 5 (longitudinal groove portion) formed in the plate is formed so as run rectilinearly through the plurality of tops 4 which are disposed in the length-wise direction on the plate 1. Specifically, the groove portion 5 is formed cutting off the tops 4 of the first ridges 2a and the second ridges 2b in the projections 2. As a result, any two given recesses 3 positioned flanking a respective projection 2 communicate with each other via the groove portion 5.
  • the longitudinal groove portion 5 is set to be wider than the recesses 3 (transversal groove portion) formed between the V-shaped projections 2 and projections 2 adjacent thereto.
  • the width of the longitudinal groove portions 5 has been depicted as smaller than the width of the recesses 3, for convenience.
  • the surface shape of the plate 1 for a heat-exchanging plate according to the present invention is a shape such as that of the draining grooves (tread patterns) that are carved in the contact patch of tires used in automobiles or the like.
  • the transversal groove portions (recesses) 3 are formed so as to open in the width direction with respect to the longitudinal groove portions 5 that are formed in the longitudinal direction of the plate 1.
  • Fig. 4 is a diagram for explaining the dimensions of the uneven shape formed on the plate 1.
  • Fig. 5 is a diagram for explaining the dimensions of the shape of the projections 2 formed on the plate 1 (enlarged diagram of portion B in Fig. 4 , illustrating a partial cutaway cross-section of portion B).
  • Fig. 6 is a diagram illustrating data of experiments performed in order to derive a shape parameter.
  • Fig. 7 is a diagram illustrating results of a condensation heat-transfer performance test.
  • Fig. 8 is a diagram illustrating a relationship between a shape parameter of the projections 2 formed on the plate 1 and an improvement rate of condensation thermal transfer properties.
  • the height h of the projections 2 is set to be 0.02 mm or greater and 0.1 mm or less
  • the width Wa of the projections 2 is set to be 0.08 mm or greater and 1 mm or less.
  • the angle ⁇ formed by the projections 2 with respect to the width direction of the plate 1 is set to be 10° or greater and 80°or less.
  • the width Wb of the recesses 3 is set to be 0.1 mm or greater and 1 mm or less.
  • the width Wc of the longitudinal groove portion 5 may be set to be 0.5 mm or greater and 500 mm or less.
  • the width pitch P 2 being the pitch between mutually adjacent longitudinal groove portions 5 may be set to be 5 mm or greater and 1000 mm or less.
  • the irregularities of the surface 1a of the plate 1 may be formed in such a manner that a shape parameter defined as "height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm) / width pitch P 2 (mm) of the longitudinal groove portions 5]" is 0.0025 mm 2 or greater.
  • the inventors of the present application focused on a shape parameter of the uneven shape "height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm) / width pitch P 2 (mm) of the longitudinal groove portions 5]" in order to optimize the height h of the projections 2, the width Wa of the projections 2, the angle ⁇ of the projections 2, the width Wb of the recesses 3, the projection pitch P 1 of adjacent projections 2, the width Wc of the longitudinal groove portions 5, and the width pitch P 2 of the adjacent longitudinal groove portions 5, when producing the plate 1 for a heat-exchanging plate.
  • the inventors of the present application produced a plurality of plates 1 having different dimensions of the uneven shape, and examined an improvement rate on condensation heat-transfer performance of each plate 1.
  • FIG. 6 there were produced seventeen plates 1 of dissimilar uneven shape dimensions.
  • the plate 1 denoted by number 0 in Fig. 6 there is formed an uneven shape the dimensions whereof include height h of the projections 2: 0.04 mm, width Wa of the projections 2: 0.125 mm, width Wb of the recesses 3: 0.6 mm, projection pitch P 1 of adjacent projections 2: 0.725 mm, angle ⁇ of the projections 2: 45°, width Wc of the longitudinal groove portions 5: 4 mm, and width pitch P 2 of adjacent longitudinal groove portions 5: 20 mm.
  • a shape parameter "(A ⁇ B):h ⁇ Wb ⁇ [Wc/P 2 ]" of 0.0048 mm 2 is derived from parameters A and B.
  • the plate 1 (number 0) having the above uneven shape exhibited a heat transfer coefficient U, in a heat exchanger, of 1044 (W/m 2 K).
  • the plate 1 (number 0) exhibited an improvement of 16% with respect to the heat transfer coefficient U (900 (W/m 2 K)) of a conventional (smooth-surface) plate (working example).
  • the plate 1 (number 1) having the above uneven shape exhibited an improvement of 20.6% in condensation heat-transfer performance as compared with a conventional plate (working example).
  • the plate 1 (number 2) having the above uneven shape exhibited an improvement of 10% in condensation heat-transfer performance as compared with a conventional plate (working example).
  • the plates 1 denoted by number 3 to number 13 in Fig. 6 exhibited likewise improvements of 5% or more in condensation heat-transfer performance as compared with a conventional plate, similarly to the plate 1 denoted by number 0 to number 2 (working examples).
  • the plate (number 14) having the above uneven shape exhibited merely an improvement of only 3.4% in condensation heat-transfer performance as compared with a conventional plate (comparative example).
  • the shape parameter defined as "height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm) / width pitch P 2 (mm) of the groove portions 5]" for irregularities formed on the surface 1a of the plate must be 0.0025 mm 2 or greater in order to improve the condensation heat-transfer performance of the plate 1 by 5% with respect to conventional instances.
  • the plate 1 for a heat-exchanging plate allows promoting accumulation and discharge of condensate by virtue of the fine uneven shape, being a combination of V-shapes and longitudinal grooves, that are formed on the surface of the plate.
  • the plate 1 according to the embodiment of the present invention allows producing a heat-exchanging plate the condensation heat-transfer performance of which is far superior to that of conventional plates.
  • the plate 1 To produce the plate 1, first, determination is made on the material, plate thickness and external dimensions of the plate 1, the shape of the irregularities that are formed on the surface 1 a of the plate, as well as the dimensions of the shape, taking into consideration the desired dimensions, plate thickness and so forth of the heat-exchanging plate that is the final product.
  • the shape of the irregularities is prescribed to be a V-shape, and there are prescribed the dimensions of the projections 2, the dimensions of the recesses 3, the pitch P 1 of the projections 2, the dimensions of the longitudinal groove portions 5 and the pitch P 2 of the longitudinal groove portions 5 in the V shape.
  • the height h is set to lie in the range from 0.02 mm to 0.1 mm
  • the width Wa is set to lie in the range from 0.08 mm to 1 mm
  • the angle ⁇ is set to lie in the range from 10° to 80°.
  • the width Wb is set to lie in the range from 0.1 mm to 1 mm.
  • the pitch P 1 between projections 2 and other projections 2 adjacent thereto is set to lie in the range from 0.2 mm to 2 mm.
  • the width Wc may be set to lie in the range from 0.5 mm to 500 mm, and the width pitch P 2 between groove portions 5 and other groove portions 5 adjacent thereto may be set to be 5 mm or greater and 1000 mm or less.
  • the dimensions of the irregularities may be set so that the value derived from the shape parameter defined as "height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm) / width pitch P 2 (mm) of the groove portions 5]" is 0.0025 mm 2 or greater.
  • a metallic flat plate for instance, titanium material that constitutes the plate 1 is prepared, and the plate 1 is formed to a predetermined size.
  • a lubricating layer formed on the surface 1a of the plate is removed by a laser processing method, and the portion having had the layer removed therefrom is pickled, to form thereby irregularities and produce the plate 1 for a heat-exchanging plate.
  • the production method of the present embodiment is appropriate for producing a plate 1 for a heat-exchanging plate in which a flat plate made of titanium is utilized, but can also be resorted to in order to produce a plate 1 for a heat-exchanging plate in which a plate made of an aluminum alloy or a high-tensile plate is utilized. That is, a plate of any material may be used in the method for producing a plate 1 for a heat-exchanging plate of the present embodiment, so long as the plate is made of metal.
  • the plate for a heat-exchanging plate of the present invention is a plate being constituted by a metallic flat plate having irregularities formed on a surface thereof, and the heat-exchanging plate being obtained through press-working, which is a post-process, of the flat plate, wherein the irregularities include a plurality of projections that are formed at a predetermined spacing; and the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle - ⁇ with respect to the width direction of the plate, the projections being formed into V-shapes by the first ridges and the second ridges.
  • a groove portion is formed along the longitudinal direction of the plate, at respective tops of the V-shapes.
  • the height of the projections is set to be 0.02 mm or greater and 0.1 mm or less; the width of the projections is set to be 0.08 mm or greater and 1 mm or less; the value of ⁇ is set to be 10° or greater and 80° or less; the width of recesses between the projections is set to be 0.1 mm or greater and 1 mm or less; and the pitch P 1 between adjacent projections is set to be 0.2 mm or greater and 2 mm or less.
  • the width of the groove portion may be set to be 0.5 mm or greater and 500 mm or less.
  • the groove portion may be formed in plurality, and the width pitch P 2 between adjacent groove portions may be set to be 5 mm or greater and 1000 mm or less.
  • the irregularities of the surface of the plate may be set such that a shape parameter defined as "height (mm) of the projections ⁇ width (mm) of recesses between projections ⁇ [width (mm) / width pitch P 2 (mm) of the groove portions]" is 0.0025 mm 2 or greater.
  • the method for producing a plate for a heat-exchanging plate of the present invention is a method for producing a plate being constituted by a metallic flat plate having irregularities formed on a surface thereof, and the heat-exchanging plate being obtained through press-working, which is a post-process, of the flat plate, the method including: forming the irregularities on the surface such that the irregularities include a plurality of projections formed at a predetermined spacing; and forming, when forming the irregularities, the plurality of projections in such a manner that the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle - ⁇ with respect to the width direction of the plate, and the projections are formed into V-shapes by the first ridges and the second ridges.
  • a groove portion is formed along the longitudinal direction of the plate, at respective tops of the V-shapes.
  • the height of the projections is set to be 0.02 mm or greater and 0.1 mm or less; the width of the projections is set to be 0.08 mm or greater and 1 mm or less; ⁇ is set to be 10° or greater and 80°or less; the width of recesses between the projections is set to be 0.1 mm or greater and 1 mm or less; and the pitch P 1 between adjacent projections is set to be 0.2 mm or greater and 2 mm or less.
  • the width of the groove portion may be set to be 0.5 mm or greater and 500 mm or less.
  • the width pitch P 2 between adjacent groove portions may be set to be 5 mm or greater and 1000 mm or less.
  • the irregularities of the surface of the plate may be designed such that a shape parameter defined as "height (mm) of the projections ⁇ width (mm) of recesses between projections ⁇ [width (mm) / width pitch P 2 (mm) of the groove portions]" is 0.0025 mm 2 or greater.
  • the plate for a heat-exchanging plate and the method for producing the plate of the present invention allow a liquid film generated during the operation of a heat exchanger to be efficiently discharged, allow forming irregularities such that the thickness of the liquid film is reduced, and allow enhancing heat-transfer performance without collapse of the irregularities.

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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)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (8)

  1. Blech (1) für ein Wärmetauschblech eines Kühlers, wobei das Blech (1) aus einem flachen Metallblech ausgebildet ist, das Unregelmäßigkeiten aufweist, die auf einer Oberfläche (1a) davon ausgebildet sind, wobei das Wärmetauschblech durch eine Pressbearbeitung, die als Nachbearbeitung implementiert ist, des flachen Blechs erhalten wird, so dass danach das Wärmetauschblech erhalten wird, wobei die Unregelmäßigkeiten eine Mehrzahl von Vorwölbungen (2) umfassen, die in einem vorgegebenen Abstand ausgebildet sind;
    die Mehrzahl von Vorwölbungen (2) erste Rippen (2a), die in einem Winkel von +θ in Bezug auf eine Breitenrichtung des Blechs (1) angeordnet sind, und zweite Rippen (2b), die in einem Winkel von -θ in Bezug auf die Breitenrichtung des Blechs (1) angeordnet sind, umfasst, wobei die Vorwölbungen (2) durch die ersten Rippen (2a) und die zweiten Rippen (2b) zu V-Formen ausgebildet sind, und jeweilige Oberseiten (4) an Abschnitten ausgebildet sind, an denen sich die Enden der ersten Rippen (2a) und die Enden der zweiten Rippen (2b) miteinander schneiden;
    die Höhe der Vorwölbungen (2) auf 0,02 mm oder größer und 0,1 mm oder kleiner eingestellt ist;
    die Breite der Vorwölbungen (2) auf 0,08 mm oder größer und 1 mm oder kleiner eingestellt ist;
    der Wert von θ auf 10° oder größer und 80° oder kleiner eingestellt ist;
    die Breite von Vertiefungen (3) zwischen den Vorwölbungen (2) auf 0,1 mm oder größer und 1 mm oder kleiner eingestellt ist; und
    der Abstand P1 zwischen angrenzenden Vorwölbungen (2) auf 0,2 mm oder größer und 2 mm oder kleiner eingestellt ist,
    wobei ein Rillenabschnitt (5) entlang einer Längsrichtung des Blechs (1) an jeweiligen Oberseiten (4) der V-Formen ausgebildet ist.
  2. Blech (1) für ein Wärmetauschblech nach Anspruch 1, wobei die Breite des Rillenabschnitts (5) auf 0,5 mm oder größer und 500 mm oder kleiner eingestellt ist.
  3. Blech (1) für ein Wärmetauschblech nach Anspruch 1 oder 2, wobei der Rillenabschnitt (5) in einer Mehrzahl ausgebildet ist, und
    der Breitenabstand P2 zwischen angrenzenden Rillenabschnitten (5) auf 5 mm oder größer und 1000 mm oder kleiner eingestellt ist.
  4. Blech (1) für ein Wärmetauschblech nach Anspruch 3, wobei die Unregelmäßigkeiten der Oberfläche des Blechs (1) derart eingestellt sind, dass ein Formparameter, der als "Höhe (mm) der Vorwölbungen (2) x Breite (mm) von Vertiefungen (3) zwischen Vorwölbungen (2) x [Breite (mm)/Breite des Abstands P2(mm) der Rillenabschnitte (5)]" festgelegt ist, 0,0025 mm2 oder größer ist.
  5. Verfahren zur Herstellung des Blechs (1) für ein Wärmetauschblech eines Kühlers nach einem der Ansprüche 1 bis 4, wobei das Blech (1) aus einem flachen Metallblech ausgebildet ist, das Unregelmäßigkeiten aufweist, die auf einer Oberfläche (1a) davon ausgebildet sind, wobei das Wärmetauschblech durch eine Pressbearbeitung, die als Nachbearbeitung implementiert ist, des flachen Blechs erhalten wird, so dass danach das Wärmetauschblech erhalten wird,
    wobei das Verfahren umfasst:
    Bilden der Unregelmäßigkeiten auf der Oberfläche (1a) derart, dass die Unregelmäßigkeiten eine Mehrzahl von Vorwölbungen (2) umfassen, die in einem vorgegebenen Abstand ausgebildet sind; und
    Bilden, bei der Bildung der Unregelmäßigkeiten, der Mehrzahl von Vorwölbungen (2) derart, dass die Mehrzahl von Vorwölbungen (2) erste Rippen (2a), die in einem Winkel von +θ in Bezug auf eine Breitenrichtung des Blechs (1) angeordnet sind, und zweite Rippen (2b), die in einem Winkel von -θ in Bezug auf die Breitenrichtung des Blechs (1) angeordnet sind, umfasst, wobei die Vorwölbungen (2) durch die ersten Rippen (2a) und die zweiten Rippen (2b) zu V-Formen ausgebildet sind, und jeweilige Oberseiten (4) an Abschnitten ausgebildet sind, an denen sich die Enden der ersten Rippen (2a) und die Enden der zweiten Rippen (2b) miteinander schneiden, wobei das Verfahren ferner umfasst:
    Bilden eines Rillenabschnitts (5) entlang der Längsrichtung des Blechs (1) an jeweiligen Oberseiten (4) der V-Formen.
  6. Verfahren nach Anspruch 5, wobei die Breite des Rillenabschnitts (5) auf 0,5 mm oder größer und 500 mm oder kleiner eingestellt wird.
  7. Verfahren nach Anspruch 5 oder 6, wobei bei der Bildung des Rillenabschnitts (5) in einer Mehrzahl der Breitenabstand P2 zwischen angrenzenden Rillenabschnitten (5) auf 5 mm oder größer und 1000 mm oder kleiner eingestellt wird.
  8. Verfahren nach Anspruch 7, wobei die Unregelmäßigkeiten der Oberfläche des Blechs (1) so gestaltet werden, dass ein Formparameter, der als "Höhe (mm) der Vorwölbungen (2) x Breite (mm) von Vertiefungen (3) zwischen Vorwölbungen (2) x [Breite (mm)/Breite des Abstands P2(mm) der Rillenabschnitte (5)]" festgelegt ist, 0,0025 mm2 oder größer ist.
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CN106030234A (zh) 2016-10-12
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CN106030234B (zh) 2018-07-20
RU2016138147A3 (de) 2018-03-30
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