Refrigeration – Automatic control – Refrigeration producer
Patent
1978-04-13
1979-05-08
Capossela, Ronald C.
Refrigeration
Automatic control
Refrigeration producer
62514JT, F25B 4104
Patent
active
041529030
ABSTRACT:
A demand-flow cryostat wherein a refrigerant is supplied through an elongated heat exchanger disposed in a container and the refrigerant is expanded through a Joule-Thompson expansion orifice at one end of the heat exchanger to provide an inventory of liquid in the container at that end and wherein a valve member for controlling a refrigerant flow through the orifice is located adjacent thereto and is movable relative to the orifice; whereby a throttling movement is effected with a reduction in temperature. The operation of the orifice and valve member characterized in that each is affixed to separate mounting means, each of which mounting means is associated with a separate control element composed of different materials whose mean cryogenic linear coefficients of expansion differ by at least about 1.times.10.sup.-5 (.degree. K.sup.-1).
REFERENCES:
patent: 3269140 (1966-08-01), Peterson et al.
patent: 3320755 (1967-05-01), Jepsen et al.
patent: 3413819 (1968-12-01), Hansen
patent: 3457730 (1969-07-01), Berry et al.
patent: 3517525 (1970-06-01), Campbell
patent: 3728868 (1973-04-01), Longsworth
patent: 4028907 (1977-06-01), Herrington et al.
Air Products and Chemicals Inc.
Capossela Ronald C.
Innis E. Eugene
Moyerman Barry
Ryder Thomas G.
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