Patent ID: 6843071
Filing Date: 2005-01-18
Classification: F25B

Abstract:
1. A method for preparing a sorption chamber for a portable, single-use, non-releasing evaporation-type refrigerator that produces a refrigerant vapor during evaporative heating, the method comprising: A) providing a sealable chamber for sorbent, and a sorbent material for absorbing and adsorbing the refrigerant vapor; B) heating said sorbent material to a temperature sufficient to volatilize absorbed and adsorbed material contained therein and thereon; C) removing said volatilized material from said heated sorbent material by evacuating said sorbent material; D) adding a backfilling gas to the sorbent, wherein the gas has a ratio of specific heats of at least about 1.5; E) loading the sorbent chamber with backfilling gas-charged sorbent; F) removing said backfilling gas from the sorbent by evacuating said sorbent chamber; and G) sealing the sorbent chamber to prevent introduction of air gases to said sorbent.