| 摘要 |
A dehumidifier has a closed heat-pump circuit with a blower arranged to pass a stream of air through a passage in the dehumidifier in which both the condenser and evaporator exchangers are provided, with the evaporator exchanger upstream of the condenser exchanger. The evaporator exchanger is formed as a plate-type heat exchanger which comprises a stack of like corrugated plates arranged in pairs in a stack. The plates of each pair are mirror symmetrical about a plane passing through the interface between the pairs and therefore define a plurality of parallel and generally horizontal passages through which the humid gas is passed. The corrugations of each plate are parallel to and offset from the corrugations of the immediately adjoining plate of the next pair by a distance equal to half a corrugation width so that there is formed between each pair a vertical generally sinusoidal flat passage through which the coolant is passed. In addition each plate is formed with generally vertical ridges which lie against similar ridges of the plate of the immediately adjoining pair so as to space each pair rigidly from the adjoining pairs. The plates are all made of chromium steel and an aluminum foil is provided at the interface between each pair of plates and is formed with laterally extending V-shaped projections that serve to catch drips and lead them to the bottom of the evaporator whence they are carried away from the dehumidifier. |
