Oil return from refrigeration system evaporator using hot...

F - Mech Eng,Light,Heat,Weapons – 25 – B

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F25B 43/02 (2006.01) F25B 31/00 (2006.01)

Patent

CA 2378978

Oil is returned from the evaporator to the oil sump in a refrigeration chiller by directing the lubricant-liquid refrigerant mixture found in the chiller evaporator into heat exchange contact with relatively hotter system lubricant as such lubricant flows from the oil sump to the location of its use in the chiller's compressor. The oil flowing from the sump to the compressor rejects sufficient heat to the lubricant-liquid refrigerant mixture to induce the percolation thereof, such percolation being sufficiently energetic to cause slugs of the lubricant-liquid refrigerant mixture to be delivered from the location of heat exchange into the chiller's lubricant sump thereby effecting the return of oil from the evaporator for reuse in the compressor.

Dans un dispositif de refroidissement, l'huile est renvoyée de l'évaporateur au carter par mise en contact pour échange thermique du mélange réfrigérant lubrifiant-liquide de l'évaporateur du refroidisseur avec le lubrifiant du système relativement plus chaud du fait que ce lubrifiant s'écoule du carter à son point d'utilisation par le compresseur du refroidisseur. L'huile s'écoulant du carter au compresseur dégage suffisamment de chaleur dans le mélange réfrigérant lubrifiant-liquide pour induire la percolation dudit mélange, cette percolation produisant suffisamment d'énergie pour expulser les bouchons du mélange réfrigérant lubrifiant-liquide du point d'échange thermique au carter de lubrifiant du refroidisseur, ce qui permet à l'huile d'être renvoyée de l'évaporateur en vue de sa réutilisation dans le compresseur.

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