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
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
  • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
  • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally

Definitions

• the present invention relates to an arrangement for a heat exchanger which has at least one internal duct for a flowing fluid and external mutually parallel fins, in the space between which air is caused to flow by means of a fan or the like.
• the aim is to increase the exchange of heat between the fluid and the air by increasing with fans the flow-speed of the air, i.e. the amount of air which flows per unit of time between the fins. Since the flow-speed at the fins is virtually nil the increased flow speed does not increase the transfer of heat to a corresponding degree.
• a prime object of the present invention is to increase the transfer of heat both by increasing the heattransfer surfaces of a heat exchanger and also by dividing the stream of air into a plurality of lesser spaces, with a more uniform flow-speed.
• the arrangement comprises a device which is made from thermally conducting material and is designed to be fitted in the said space in thermal contact with the fins on either side of the space, and which is constructed so that, when thus fitted between the fins, it effects the division of the space between them into at least two parallel ducts.
• the said device has a zig-zag or wave-shaped cross-section with its apexes adjoining the fins, it is possible for the invention to be of simple design and for the invention to be used with existing heat exchangers as well.
• the said device may comprise a wall disposed approximately centrally between the fins with flanges projecting from it and with the tips of these flanges adjoining the fins of the heat exchanger.
• Figure 1 shows schematically in cross-section a cylindrical heat exchanger with radially projecting mutually parallel fins between which the dividing device made of an ela ⁇ tically deformable material is disposed.
• the said device is fixed in the space between two fins by its clamping force.
• Figure 2 shows schematically in cross-section a dividing device with a zig-zag crosssection, clamped in between two heat exchanger fins via grooves disposed in the sides of the fins and a projection with which the apexes of the dividing device engage.
• Figure 3 shows in cross-section a dividing device with a wave-shaped cross-section.
• FIG. 1 designates the wall of an internal duct 2 for a flowing fluid. Radially projecting fins extend from the wall 1; only two fins, designated 3, 4, are explicitly marked on the drawing.
• the dividing device 5 which is made of thermally conducting material, is inserted in the spaces between the fins of the heat exchanger and is in thermal contact with them, dividing up the space between the fins 3, 4 into a plurality of parallel ducts 6a, 6b, 6c, etc.
• the dividing device comprises a wall 7 disposed centrallybetween the fins 3, 4 with flanges 8a, 8b, 8c, etc. extending from it, the tips of which adjoin the fins 3, 4.
• the dividing device is formed from an elastic material and is designed to be held in the space between the fins 3, 4 by the clamping force of the flanges 8.
• the dividing device may also be fixed in the space between the fins 3, 4 by the engagement of the apexes of the zig-zag shaped dividing device with corresponding grooves 9 and projections 10.
• the said device may be fixed between the fins 3, 4 by gluing, soldering, or welding.
• the invention makes it possible to exploit the so-called chanelling effect to increase the transfer of heat by the heat exchanger.

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Geometry (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Accessory Devices And Overall Control Thereof (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20351470

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Family Cites Families (4)

• 1983
  • 1983-06-07 SE SE8303189A patent/SE8303189L/ not_active Application Discontinuation
• 1984
  • 1984-06-01 JP JP50234584A patent/JPS60501517A/ja active Pending
  • 1984-06-01 EP EP19840902383 patent/EP0172827A1/en not_active Withdrawn
  • 1984-06-01 WO PCT/SE1984/000210 patent/WO1984004958A1/en active Application Filing
• 1985
  • 1985-02-05 NO NO850431A patent/NO850431L/no unknown
  • 1985-06-13 FI FI852351A patent/FI852351A0/fi not_active Application Discontinuation

Non-Patent Citations (1)

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