F - Mech Eng,Light,Heat,Weapons – 28 – D
Patent
F - Mech Eng,Light,Heat,Weapons
28
D
257/27, 62/74
F28D 7/04 (2006.01) B23P 15/26 (2006.01) F25B 39/02 (2006.01) F25D 17/06 (2006.01)
Patent
CA 1099253
ABSTRACT OF THE DISCLOSURE 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 propor- tion 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.
314592
Hahn Thomas M.
Lohmus Ivar
Oakley David E.
Company General Electric
Eckersley Raymond A.
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