Anthony R Brancato

US Patent:

6823682, Nov 30, 2004

Filed:

Jan 13, 2004

Appl. No.:

10/756566

Inventors:

Neil D. Jenkins - Collegeville PA
David M. Martini - Liverpool NY
Anthony Brancato - Huntington NY

Assignee:

Carrier Corporation - Farmington CT

International Classification:

F25B 1500

US Classification:

62141, 62476, 62479

Abstract:

An absorption chiller having a protection system for preventing the chilled water in the evaporator tubes from freezing in the event the water flow through the tubes closes down while the machine is running. A sensor in the evaporator heat exchanger is arranged to detect when the water flow through the heat exchanger tubes closes down and signals the machine controller. The controller, in turn, shuts down the machine and opens a valve in a feed line to the evaporator to deliver a high temperature working fluid from another section of the machine to the evaporator to maintain the temperature in the evaporator above that at which the water in the tubes freezes.