Combined cryosorption/auto-refrigerating cascade low temperature system
AssigneeMarin Tek, Inc.
InventorDale J. Missimer
Life of this patent
Estimating the term…
Abstract
Apparatus for producing low temperature refrigeration comprising a refrigeration sub-system for circulating a first refrigerant to provide alternately two outputs for different time periods including a first output at a relatively warm temperature level and a second output at a relatively cold temperature level. The sub-system outputs are furnished to a cryosorption pumping circuit comprised of a closed loop conduit for a second refrigerant and connected to a plurality of sorbent beds which cause cyclic adsorption and desorption of the second refrigerant material. External conditioning utilizing the first refrigerant is used to cause further temperature reduction of said second refrigerant in the closed loop conduit of the cryosorption pumping circuit.
Claims21
Apparatus for producing low temperature refrigeration comprising:
- a refrigeration sub-system including means for circulating a first refrigerant to provide alternately two outputs for different time periods including a first output at a relatively warm temperature level and a second output at a relatively cold temperature level;
- a cryosorption pumping circuit comprised of a closed loop conduit for a second refrigerant, said conduit circuit being connected to a plurality of sorbent beds;
- conduit means interconnecting said refrigeration sub-system and said cryosorption pumping circuit including valve means for alternately controlling the flow of said first refrigerant at its warm and cold temperature levels for selected time periods sufficient to cause cyclic adsorption and desorption of said second refrigerant material in said sorbent beds;
- and
- external conditioning means for utilizing said first refrigerant to cause further temperature reduction of said second refrigerant in said closed loop conduit of said cryosorption pumping circuit.
A refrigeration system comprising:
- a first closed looped refrigeration circuit having a dual output including a first outlet means providing a first refrigerant at a relatively warm temperature level and a second outlet means providing the refrigerant at a relatively cold temperature level;
- a second closed looped refrigeration circuit containing a second refrigerant and connected to said first circuit and including a pair of sorbent beds, said first circuit including coils for warming or cooling said sorbent beds;
- external conditioning means for further cooling said second refrigerant in said second circuit including heat exchanger means, separator means and throttling means;
- and a third output from said first circuit connected to said conditioning means for further cooling said second refrigerant as it flows through said conditioning means.
A method for producing low temperature refrigeration comprising the steps of:
- providing a first closed-loop refrigeration sub-system for a first refrigerant to provide two controllable alternating outputs at relatively warm and relatively cool temperatures;
- providing a second closed loop refrigerant circuit for a second refrigerant including a pair of sorbent beds;
- utilizing said relatively cool output of said sub-system to cause adsorption of said second refrigerant;
- and
- utilizing said relatively warm output of said sub-system to cause desorption of said second refrigerant to thereby pump low temperature refrigerant in said second circuit from a lower pressure to a higher pressure;
- and
- removing heat from said second refrigerant after said desorption.
Dependencies are inferred from the claim text.