| 摘要 |
<p>Self cooling and self heating beverage containers (12 and 14) utilizing water, the boiling point of which has been lowered by a vacuum as the working cooling fluid. A dessicant (38) in a separate container (14) sorbs the vapor generated by the boiling water. The sorption of vapor by the dessicant raises the temperature of the dessicant and limits its vapor sorbing abilities. Provision is made to lower the temperature of the dessicant chamber. In one version of the invention the dessicant chamber is constructed of good heat conducting material, and is immersed in a water bath, to lower the temperature of the dessicant chamber. Alternatively, the outside surfaces of the dessicant chamber are coated with a wick like material (86). Prepackaged water is provided to wet the coated dessicant chamber surfaces. The dessicant chamber is then cooled by natural evaporation of the water.</p> |
