Refrigeration – Storage of solidified or liquified gas – With vapor discharged from storage receptacle
Patent
1990-12-26
1992-04-07
Capossela, Ronald C.
Refrigeration
Storage of solidified or liquified gas
With vapor discharged from storage receptacle
62 492, 62 501, 62 505, F17C 704
Patent
active
051016362
ABSTRACT:
The present invention relates to a cryogen delivery apparatus and method for delivering a flowing cryogen with a regulated cooling potential. The apparatus includes a pressure vessel for receiving a liquid form of the cryogen. A liquid-vapor interface is maintained within the pressure vessel so that a gaseous form of the cryogen having a low cooling potential is situated above the liquid-vapor interface and a liquid form of the cryogen having a high cooling potential is situated below the liquid-vapor interface. An outlet conduit is provided for delivering the gas and liquid forms of the cryogen from the pressure vessel. The conduit has a moveable end section located within the pressure vessel. When the moveable end section is oscillated above and below the level of a liquid-vapor interface, a two-phase flow of cryogen is delivered comprising the pure gaseous and liquid forms of the cryogen. A timing control circuit is provided to selectively regulate the time intervals that moveable end section is above and below the liquid-vapor interface during each period of oscillation. Such regulation in turn regulates the proportions of the gaseous and liquid forms and thus, the cooling potential contained in the delivered cryogen.
REFERENCES:
patent: 4592205 (1986-06-01), Brodbeck
patent: 4607489 (1986-08-01), Knongold
patent: 4873832 (1989-10-01), Porter
Kirschner Mark J.
Lee Ron C.
Capossela Ronald C.
Pearlman Robert I.
Rosenblum David M.
The BOC Group Inc.
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