| 摘要 |
An evaporator for a cooling device such as a refrigerator/freezer wherein the outer surface (6) of the evaporator has spirally wound thereon a spiked or looped fin heat conductive ribbon material (2). The spikes or fins effectively increasing the surface area of the evaporator surface in order to more efficiently and effectively cool the cooling device. A heating wire (3) is also spirally wound onto the evaporator tube at or near the region of contact of the spikes or fins. The heater wire (3) having an electrically insulating coating (4) so that, upon energisation of the heating wire (3), the spikes or fins and the area on the evaporator tube adjacent to the heater wire (3) are warmed and defrosted. The initially straigth evaporator tube (1) with the spikes or fins and heater wire (3) attached is carefully wound in a loose planar spiral so that the tips of the spikes or fins from adjacent turns of the spiral are nearly touching in order to minimise space and avoid crushing the spikes or fins and the heater wire insulation (4). |
