Refrigeration – Processes – Circulating external gas
Patent
1998-01-26
2000-08-29
Doerrler, William
Refrigeration
Processes
Circulating external gas
62525, 16510421, F25D 1706
Patent
active
061090441
ABSTRACT:
A fan coil unit comprising an air conditioning coil using a main cooling coil surrounding by a heat pipe. The cooling coil is face-split to form a first portion for conditioning inside air, as needed, and second portion for continuously conditioning outside air. The air conditioning coil is positioned between an pre-cooler or evaporator coil and a re-heater or condenser coil. The pre-cooler and re-heater are comprised of a plurality of passive heat pipes, at least one circuit for each of the first and second portions of the face-split cooling coil. Each of the circuits is a continuous length of pipe folded into a C-shape having a crossover end and a hair pin end. In this way, vapor can rise in the upper portion of the pre-cooler side, through the upper crossover pipe, to the re-heater side. On the re-heater side, the vapor condenses, and the liquid flows through the hair pin end, down the lower portion of the pipe on the re-heater side, down the lower crossover pipe and returns to the lower portion of the pipe on the pre-cooler side. Thus, each circuit acts as a passive heat pipe. Chilled water is continuously circulated through the second portion to condition outside air and is selectively circulated through the first portion to condition room air in response to a thermostat.
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Porter Ronald D.
Sabatino Kim A.
Doerrler William
International Environmental Corp.
Lee Mary M.
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