Claims
- 1. For use in a fin-and-tube heat exchanger,
- a generally planar fin having at least one pattern of louvers formed to project from the plane of the fin,
- said pattern being radially symmetrical about an axis in the plane of the fin and having a plurality of louvers on each side of said axis, in which pattern
- those opposite louvers outermost from said axis extend substantially in their entirety to one side of said plane, and in which
- each of the louvers has a portion in the plane of the fin, and
- at least the greater part of each louver intermediate said axis and an outermost louver extends to the same side of said plane as said outermost louver.
- 2. For use in a fin-and-tube heat exchanger,
- a fin as defined in claim 1, wherein
- each louver in said pattern subsequent to an outermost louver therein has a leading edge extending into such airflow successively farther than the louver proceeding it.
- 3. For use in a fin-and-tube heat exchanger, a fin as defined in claim 1, wherein
- said louvers are in a graduated array wherein the louver outermost from said axis at one side therefrom projects substantially in its entirety into the air stream on one side of the plane of said fin substantially in its entirety,
- the louver outermost from said axis on the other side thereof extends substantially in its entirety into the air stream on the opposite side of the plane of said fin,
- and the louvers therebetween extend in a progressively graduated array between said outermost louvers.
- 4. For use in a fin-and-tube heat exchanger, a fin as defined in claim 1, wherein
- each said louver is flat,
- whereby to intercept airflow in either direction across it and to effect translation thereof with substantially equal effectiveness.
- 5. For use in a fin-and-tube heat exchanger, a fin as defined in claim 1, wherein, considered in the direction of airflow, each fin is concave,
- whereby the pattern of louvers serves to displace the airflow in the manner of a turning vane.
- 6. For use in a fin-and-tube heat exchanger, a fin as defined in claim 1, wherein
- each said louver is of reversing curvature sloping from an airflow leading edge, at a slight angle relative to said plane, to an increasing angle relative thereto and then in reverse curvature to a decreasing angle as a trailing edge of said louver is approached.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 07/447,924, filed Dec. 8, 1989, entitled "Bi-Directional Heat Exchanger Fin Stock," to be abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4365667 |
Hatada et al. |
Dec 1982 |
|
4469167 |
Itoh et al. |
Sep 1984 |
|
4756362 |
Kudoh et al. |
Jul 1988 |
|
Foreign Referenced Citations (4)
Number |
Date |
Country |
119494 |
Sep 1981 |
JPX |
194194 |
Aug 1987 |
JPX |
251794 |
Oct 1988 |
JPX |
2125529 |
Mar 1984 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
447924 |
Dec 1989 |
|