Pressure responsive valve in a temperature changing device

Details Pressure responsive valve in a temperature changing device Pressure responsive valve in a temperature changing device

1988-08-02

1990-03-27

King, Lloyd L.

Refrigeration

Chemical reaction or solids dissolving

62294, F25D 500

Patent

active

049117408

ABSTRACT:
Disclosed is a pressure responsive valve which is opened upon a change in pressure so that there is fluid communicating between a first and second chamber. The valve, though useful in connection with any pressurized container or environment, is shown in conjunction with a self-contained, rapid cooling device that retains heat produced from the cooling process and can be stored for indefinite periods without losing its cooling potential. A liquid in a first chamber undergoes a change of phase into vapor, which cools the first chamber. A sorbent in a second chamber is in fluid communication with the vapor and removes the vapor from the first chamber. The cooling process is facilitated by lining the interior surface of the first chamber with a wicking material to retain the largest possible contact between the liquid and the first chamber as the level of the liquid lowers during the vaporization process. The device is self-contained because a material in contact with the sorbent removes the heat from the sorbent to prevent the reduction in the cooling effect produced by the first chamber.

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