Cryogen delivery apparatus and method for regulating the cooling potential of a flowing cryogen
US5101636A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Dec 26, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2270/05
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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 pote…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.