Actuating Device for Self Cooling Packaging
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Accused Products
Abstract
A self-cooling packaging comprises a cavity forming a heat exchanger (20) and containing a refrigerant liquid and the vapour thereof and a cavity forming an adsorption chamber (30) for pumping of said vapour. The packaging also includes connection means (40) provided in a common wall (25) of said cavities (20, 30), said connection means comprising a check valve (42), and actuating means (45) disposed on the side of the adsorption chamber cavity (30) and adapted to open the check valve (42) to an initial position inside the heat exchanger cavity (20). The packaging further comprise spring means (43), the check valve (42) being adapted to progressively reach a fully open position under the action of said spring means (43). The invention makes it possible to realise a progressive opening of the check valve inside the heat exchanger cavity.
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Citations
34 Claims
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1-17. -17. (canceled)
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18. A self cooling packaging comprising:
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a cavity forming a heat exchanger and containing a refrigerant liquid and the vapour thereof; a cavity forming an adsorption chamber for pumping of said vapour; a connection provided in a common wall of said cavities, said connection comprising a check valve; an actuator disposed on the side of the adsorption chamber cavity and adapted to push the check valve inside the heat exchanger cavity to an initial partly open position; a spring adapted to progressively push the check valve further inside the heat exchanger cavity from its initial partly open position to a fully open position. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for cooling the content of a self cooling packaging, said packaging comprising:
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a cavity forming a heat exchanger and containing a refrigerant liquid and the vapour thereof; a cavity forming an adsorption chamber for pumping of said vapour; a connection provided in a common wall of said cavities, said connection means comprising a check valve; an actuator disposed on the side of the adsorption chamber cavity; a spring; the method comprising the steps of; pushing the check valve inside the heat exchanger to an initial partly open position under the action of said actuator; pumping the vapour of the refrigerant liquid from the heat exchanger cavity to the adsorption chamber cavity; progressively pushing the check valve further inside the heat exchanger to a larger opening with respect to the decrease of the pressure inside the heat exchanger cavity under the action of said spring. - View Dependent Claims (34)
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Specification