Free-draining finned surface architecture for a heat exchanger

A technology of heat exchangers and fins, applied in the direction of indirect heat exchangers, heat exchanger types, heat exchange equipment safety devices, etc., can solve problems such as exposure

Inactive Publication Date: 2012-05-30
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum microchannel condensers can also become flooded due to accumulation of amb

Method used

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  • Free-draining finned surface architecture for a heat exchanger
  • Free-draining finned surface architecture for a heat exchanger
  • Free-draining finned surface architecture for a heat exchanger

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Embodiment Construction

[0018] The present invention describes a fin structure with grids and drainage enhancing features that provide improved liquid drainage within the heat exchanger. The fin structure allows water to drain more easily and improves water removal from the outer surface of the heat exchanger. This fin structure works for any type of tube-fin heat exchanger and is particularly useful for aluminum microchannel heat exchangers, especially aluminum microchannel condensers. Although specific embodiments are described with reference to aluminum microchannel heat exchangers, the invention may provide benefits to other tube-fin heat exchangers as well. Aluminum microchannel heat exchangers generally have a more compact structure than other heat exchangers. Typical fin pitches vary between about 5.5 fins per centimeter (14 fins per inch) and about 9.1 fins per centimeter (23 fins per inch), while typical heat exchange tube pitches are around 0.5 cm (0.19 in) ) and approximately 1.0 cm (0.3...

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Abstract

A free-draining heat exchanger includes a first heat exchange tube, a second heat exchange tube spaced from and generally parallel to the first heat exchange tube, and a fin contacting the first and second heat exchange tubes. The fin includes a louver and at least one drainage enhancement feature for promoting removal of liquid from external surfaces of the heat exchanger. A free-draining fin structure includes an array of fins disposed between adjacent heat exchange tubes for improving water drainage by reducing liquid surface tension. Each fin in the array includes an opening and a louver for directing airflow through the opening and around the fin and at least one drainage enhancement feature.

Description

Background technique [0001] Aluminum microchannel heat exchangers bring several advantages over the once conventional copper-aluminum or copper-copper round tube-plate-fin heat exchangers and are used in a large number of applications. However, aluminum microchannel heat exchangers also present new challenges, effective condensate drainage being one of them. Condensate that forms on the heat exchanger surfaces during operation or water that collects during shutdown can remain in the aluminum core of a finned tube heat exchanger for a long time. This problem is exacerbated when heat exchangers are used outdoors in industrial, coastal or marine environments, especially where they are exposed to high humidity levels, frequent rainfall and wind brought sea / ocean water. Water trapped on heat exchanger aluminum surfaces can lead to accelerated corrosion of the surface and eventually perforation of critical components such as heat transfer tubes and manifolds, as well as damage to j...

Claims

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Application Information

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IPC IPC(8): F28F1/32F28F17/00F28D9/02F28F13/00
CPCF28D1/05391F28F17/005F28F1/128F28F2265/06F28F2265/22
Inventor M.F.塔拉斯J.L.埃斯富姆斯S.S.梅亨戴尔S.本达普迪A.A.阿拉亚里A.乔亚达M.B.戈尔布诺夫
Owner CARRIER CORP
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