Patent ID: 6761042
Filing Date: 2004-07-13
Classification: C09K,F25B

Abstract:
A method for preparing an evaporator chamber for use in a portable, single-use, non-releasing evaporation-type refrigerator, the method comprising:A) forming a mixture of a volatile non-aqueous solvent and a refrigerant dispersant; B) depositing said mixture on the inner surface of an evaporator chamber; C) evaporating said volatile solvent to leave a substantially even coating of refrigerant dispersant on said inner surface of said evaporator chamber; D) loading said coating of refrigerant dispersant with refrigerant water to produce a substantially even layer not more than about 0.03 inches thick of refrigerant water intimately associated with said coating of refrigerant dispersant; E) removing gas from the evaporator chamber by evacuating said evaporator chamber; and F) sealing the evaporator chamber to prevent re-introduction of gas to said evaporator chamber, wherein the evaporator chamber is equipped with a means for controlling fluid communication between the interior of the evaporator chamber and an external vessel of lower pressure, and wherein the evaporator chamber is adapted to provide thermal transfer between its interior and exterior surfaces.