F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
F25B 41/00 (2006.01) F25B 40/00 (2006.01) F25B 47/02 (2006.01) F25B 9/00 (2006.01) F25B 41/04 (2006.01)
Patent
CA 2377478
Heating/defrost construction of very low temperature refrigeration system (100) having a defrost supply circuit (176, 178, 180) and a defrost return bypass circuit (186, 188, 190) optimizing the heating/defrost cycle, preventing overload (excessive pressure) of its refrigeration process and protecting components from damaging temperatures. The defrost cycle operates continuously, when required, and provides a shorter recovery period between heating/defrost and cooling operating modes. The rate of the temperature change during cool down or warm up is controlled in an open loop fashion by controlled refrigerant flow in bypass circuits (178, 190).
Cette invention a trait à un système de réfrigération à très basse température, chauffage/dégivrage (100) pourvu d'un circuit de dégivrage (176, 178, 180) et d'un circuit de retour de dégivrage en dérivation (186, 188, 190) permettant d'optimiser le cycle chauffage/dégivrage, d'éviter une saturation (pression excessive) du processus de réfrigération et de protéger les composants de températures risquant de les endommager. Le cycle de dégivrage fonctionne sans interruption, si nécessaire, et assure un temps de récupération plus court entre les modes de fonctionnement chauffage/réfrigération et refroidissement. La cadence de changement de température en mode refroidissement et en mode réchauffement est commandé en boucle ouverte par un flux réfrigérant dans des circuits de dérivation (178, 190).
Flynn Kevin P.
Hall Paul H.
G. Ronald Bell & Associates
Helix Technology Corporation
Igc Polycold Systems Inc.
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