Refrigeration – Chemical reaction or solids dissolving
Patent
1991-09-23
1992-12-08
Capossela, Ronald C.
Refrigeration
Chemical reaction or solids dissolving
126263, 62101, 16510412, F25D 500
Patent
active
051687089
ABSTRACT:
The invention consists of improvements in disposable and reuseable sorption temperature changers which eliminate the necessity of using valves which perforate the walls of the device. This facilitates the preservation of a long term leak proof air vacuum in the device, and reduces the cost of the device. Water in an air evacuated chamber boils at low temperature and cools its surroundings. The vapor generated by the low boiling point liquid is removed by sorption by a desiccant placed in a separate chamber. The sorbed vapor heats the desiccant and it surroundings. The temperature changing potential of the device can be preserved indefinitely by a barrier which prevents a communication between the liquid and desiccant chambers. The temperature changer is activated by a pliable or flexible surface portion which punctures or dislocates the barrier between the chambers.
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patent: 4759191 (1988-07-01), Thomas et al.
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