Heat exchange – With impeller or conveyor moving exchange material – Mechanical gas pump
Patent
1977-12-27
1979-11-27
Richter, Sheldon
Heat exchange
With impeller or conveyor moving exchange material
Mechanical gas pump
62419, 72137, 165163, 165172, 165DIG13, F28D 702, F28F 138
Patent
active
041756177
ABSTRACT:
A heat exchanger for refrigerator evaporators of the type consisting of helically coiled refrigerant-carrying tubing with radially inward extending fins formed along the length of the coiled tubing, with the air to be refrigerated directed across the axis of the coil turns. The coil turns are skewed from the helix angle to expose a greater proportion of the fins into the air flow path between the coil turns so as to increase the air flow contact with the fins. The skewing is created by relatively offsetting opposite portions of the coil turns along the air flow path across the helical coil to increase the obliqueness of a portion of each coil turn with respect to the direction of air flow. The tube coil includes sections folded into a side-by-side relationship, with the skew direction of the coil sections placed in reverse orientations to increase the length of the flow path of the air circulated through the coils and to position gaps between each of the coil turns in either section opposite the areas in the other coil section occupied by radial fins.
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Hahn Thomas M.
Lohmus Ivar
Oakley David E.
General Electric Company
Reams Radford M.
Richter Sheldon
Weidner Frederick P.
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