Temperature control system for a cryogenic refrigerator

G - Physics – 05 – D

Patent

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G05D 23/19 (2006.01) F25B 9/14 (2006.01) G05D 23/20 (2006.01)

Patent

CA 2000359

In a cryogenic refrigerator utilizing a linear drive motor, a temperature control system controls the displacement of an armature reciprocating at a fixed frequency to adjust the operating temperature of a working fluid at the cold end of a cold finger. Linear drive motors using dynamic absorbers to reduce vibration operate within the narrow frequency range to which the absorber is tuned. Controlling the maximum displacement of the armature used to compress the working fluid results in the ability to adjust the temperature at the cold end of the refrigerator without altering the frequency of operation.

Dans un réfrigérateur cryogénique utilisant un moteur linéaire, un système de régulation de la température contrôlant le déplacement d'un induit à mouvement alternatif à une fréquence fixe pour régler la température du fluide à l'extrémité froide d'un doigt froid. Les moteurs linéaires utilisant des absorbeurs dynamiques pour réduire les vibrations fonctionnent dans l'étroite plage de fréquences correspondant au réglage de l'absorbeur. Le réglage du déplacement maximal de l'induit utilisé pour comprimer le fluide permet de régler la température dans la partie froide du circuit, sans modifier la fréquence de fonctionnement.

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