System for a cooler and gas purity tester

Details System for a cooler and gas purity tester System for a cooler and gas purity tester

1994-01-05

1995-02-14

Davis, Jr., Albert W.

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

62 521, 621961, 62197, F25B 4700, F25B 1900

Patent

active

053884159

ABSTRACT:
A system for a cooler comprises: a heat exchange tube receiving a supply of pressurized gas, a gas escape aperture communicating with the interior of the heat exchange tube for permitting escape of the pressurized gas and expansion thereof during cooling mode, and a bypass assembly associated with said heat exchange tube and located after said gas escape aperture which during a cleaning mode enables most of the pressurized gas to exit the heat exchange tube without flowing through said gas escape aperture. The bypass assembly comprises a flush valve which is closed during said cooling mode and which is opened during said cleaning mode. According to a preferred embodiment, the heat exchange tube is helically wound over a cylindrical core and installed inside an insulated housing. The system may also be utilized as a gas purity tester, optionally with an additional gas pressure regulator, wherein a sensor will indicate the extent of the gas purity.

REFERENCES:
patent: 2943459 (1960-07-01), Rind
patent: 3314473 (1967-04-01), Smith et al.
patent: 3933003 (1976-01-01), Markum
Miniature Refrigerators for Cryogenic Sensors and Cold Electronics, by Graham Walker, Oxford University Press, pp. 12-82, New York, 1989.

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