Cooling device with controllable evaporation temperature

a cooling device and controllable technology, applied in the field of cooling devices, can solve the problems of complex logistics for the provision or generation and storage of liquefied gases, the inability to adjust the throttle, and the resultant very cold temperature of the adjustable throttle, so as to achieve simple and yet effective effects
US20120240609A1Inactive Publication Date: 2012-09-27BRUKER BIOSPIN
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
BRUKER BIOSPIN
Publication Date
2012-09-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

A cooling device for cooling a test sample has at least two cascade cooling stages, each with at least one coolant line, one compressor (1.1, 2.1), one relief throttle (1.4, 2.4), one evaporator (6, 7) and one liquefier (3, 6). The cooling device has an additional relief throttle disposed between the evaporator (7) of the last cascade cooling stage and the compressor (2.1) of the last cascade cooling stage. This represents a simple possibility of adjusting the cooling temperature, thereby avoiding the use of valves that can be adjusted at low temperatures, since these are complex and expensive.
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Description

[0001] This application claims Paris Convention priority of DE 10 2011 006 165.7 filed Mar. 25, 2011 the complete disclosure of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION

[0002] The invention concerns a cooling device for cooling a test sample, comprising at least two cascade cooling stages, each comprising at least one coolant line, one compressor, one relief throttle, one evaporator and one liquefier.

[0003] Devices having such properties are e.g. the device NMR90 of the company Millrock Technology, Kingston, N.Y., USA, the device ULSP90 of the company ULSP by, Ede, NL and the device FTS XR Air Jet of the company RototecSpintec GmbH, Biebesheim, Germany.

[0004] Various analysis methods require cooling of the samples to be analyzed. In specific cases, such as nuclear magnetic resonance spectroscopy or X-ray crystallography, this is often achieved by introducing the sample into a cold gas flow (cooling gas), advantageously nitrogen or helium.

[0005] This cold gas f...

Claims

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