US 12,359,828 B2
Low charge packaged ammonia refrigeration system with evaporative condenser
Kurt L. Liebendorfer, Taneytown, MD (US); Gregory S. Derosier, Eldersburg, MD (US); Trevor Hegg, Westminster, MD (US); Sarah L. Ferrari, Mount Airy, MD (US); Don Hamilton, Taneytown, MD (US); Nicholas Hesser, Taneytown, MD (US); and Kenneth Wright, Taneytown, MD (US)
Assigned to Evapco, Inc., Taneytown, MD (US)
Filed by Evapco, Inc., Taneytown, MD (US)
Filed on Jan. 30, 2024, as Appl. No. 18/426,556.
Application 18/426,556 is a division of application No. 17/348,042, filed on Jun. 15, 2021, granted, now 11,885,513, issued on Jan. 30, 2024.
Application 17/348,042 is a division of application No. 15/839,484, filed on Dec. 12, 2017, granted, now 11,035,594, issued on Jun. 15, 2021.
Claims priority of provisional application 62/432,883, filed on Dec. 12, 2016.
Prior Publication US 2024/0288183 A1, Aug. 29, 2024
Int. Cl. F24F 1/46 (2011.01); F25B 5/02 (2006.01); F25B 9/00 (2006.01); F25B 39/02 (2006.01); F25B 39/04 (2006.01); F25B 41/39 (2021.01); F25B 43/00 (2006.01); F25B 49/00 (2006.01); F25D 23/00 (2006.01)
CPC F24F 1/46 (2013.01) [F25B 9/002 (2013.01); F25B 39/028 (2013.01); F25B 39/04 (2013.01); F25B 41/39 (2021.01); F25B 43/00 (2013.01); F25B 49/005 (2013.01); F25D 23/006 (2013.01); F25B 5/02 (2013.01); F25B 43/006 (2013.01); F25B 2339/041 (2013.01); F25B 2400/05 (2013.01); F25B 2400/071 (2013.01); F25B 2400/13 (2013.01); F25B 2400/23 (2013.01); F25B 2500/17 (2013.01); F25B 2700/13 (2013.01); F25B 2700/1351 (2013.01); F25B 2700/19 (2013.01); F25B 2700/21175 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A refrigeration system comprising:
a refrigerant evaporator coil,
vapor/liquid separation structure connected to an outlet of said evaporator coil via refrigerant line configured to separate low pressure refrigerant vapor from low pressure refrigerant liquid;
a refrigerant compressor connected to an outlet of said vapor liquid separation structure via refrigerant line and configured to compress refrigerant vapor from said vapor liquid separation structure;
an evaporative refrigerant condenser connected to an outlet of said refrigerant compressor via refrigerant line and configured to condense refrigerant vapor produced in said compressor to refrigerant liquid,
a high pressure-side expansion device connected to an outlet of said evaporative refrigerant condenser via refrigerant line and configured to reduce pressure of refrigerant liquid received from said evaporative refrigerant condenser;
a collection vessel connected to an outlet of said high pressure-side expansion device via refrigerant line for receiving refrigerant liquid from said high pressure-side expansion device;
a low pressure-side expansion device connected to an outlet of said collection vessel via refrigerant line and configured to reduce pressure of refrigerant liquid received from said collection vessel;
refrigerant line connecting an outlet of said low pressure-side expansion device to an inlet of said vapor/liquid separation structure and configured to deliver refrigerant liquid to said separation structure;
said vapor/liquid separation structure having a liquid outlet that is connected via refrigerant line to an inlet of said evaporator;
wherein said vapor/liquid separation structure, said compressor, said high pressure side expansion device, said collection vessel, and said low pressure side expansion device are situated inside a plenum of said evaporative refrigerant condenser; and
wherein said refrigerant is ammonia.
 
14. A method for assembling a refrigeration system having a refrigerant evaporator coil,
a liquid/vapor separator connected to an outlet of said evaporator coil via refrigerant line configured to separate low pressure refrigerant vapor from low pressure refrigerant liquid,
a refrigerant compressor connected to an outlet of said liquid/vapor separator via refrigerant line and configured to compress refrigerant vapor from said liquid/vapor separator,
an evaporative refrigerant condenser connected to an outlet of said refrigerant compressor via refrigerant line and configured to condense refrigerant vapor produced in said compressor to refrigerant liquid,
a high pressure-side expansion device connected to an outlet of said evaporative refrigerant condenser via refrigerant line and configured to reduce pressure of refrigerant liquid received from said evaporative refrigerant condenser,
a collection vessel connected to an outlet of said high pressure-side expansion device via refrigerant line for receiving refrigerant liquid from said high pressure-side expansion device,
a low pressure-side expansion device connected to an outlet of said collection vessel via refrigerant line and configured to reduce pressure of refrigerant liquid received from said collection vessel, and
said method comprising packaging said refrigerant compressor, said vapor/liquid separator, said high pressure-side expansion device, said collection vessel, and said low pressure-side expansion device in a plenum of said evaporative refrigerant condenser, connecting said refrigerant evaporator coil to said evaporative refrigerant condenser via refrigerant line, and filling said refrigerant system with ammonia refrigerant.