US 10,890,341 B2
Multi-zone variable refrigerant flow heating/cooling unit
Edward H. Metzger, Acworth, GA (US); Joel John Williams, Norcross, GA (US); Charles Thomas Couch, Rome, GA (US); and Kelly Gene Sprayberry, Marietta, GA (US)
Assigned to MJC, Inc., Acworth, GA (US)
Filed by MJC, Inc., Acworth, GA (US)
Filed on Oct. 1, 2018, as Appl. No. 16/148,293.
Application 16/148,293 is a continuation of application No. 14/752,346, filed on Jun. 26, 2015, granted, now 10,088,178.
Claims priority of provisional application 62/157,109, filed on May 5, 2015.
Prior Publication US 2019/0032930 A1, Jan. 31, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. F25B 29/00 (2006.01); F24F 3/048 (2006.01); F24F 3/044 (2006.01); F24D 5/04 (2006.01); F24F 11/83 (2018.01); F24F 12/00 (2006.01); F24F 13/20 (2006.01)
CPC F24F 3/048 (2013.01) [F24D 5/04 (2013.01); F24F 3/0442 (2013.01); F24F 11/83 (2018.01); F24F 12/006 (2013.01); F24F 13/20 (2013.01); F24F 2003/0446 (2013.01); F24F 2003/0448 (2013.01); F24F 2203/1032 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An air conditioning unit, comprising:
a housing that encloses:
a first zone duct attachment to provide the supply air from the supply air inlet to a first coil used to heat or cool air entering a first zone, wherein the first zone comprises a first portion of space to which heated or cooled air is provided,
a second zone duct attachment to provide supply air from the air conditioning unit supply air inlet to a second coil used to heat or cool air entering a second zone, wherein the second zone comprises a second portion of space to which heated or cooled air is provided,
a recovery wheel/plate for reclaiming energy from exhaust air from a return/exhaust fan,
the first coil to heat the supply air to a first zone when the first coil is in a heating mode of operation and to cool the supply air to the first zone when the first coils is in a cooling mode of operation,
the second coil to heat the supply air to the second zone when the second coil is in a heating mode of operation and to cool the supply air to the second zone when the second coil is in a cooling mode of operation,
a variable speed cooling pump to supply the cooling medium to the first coil when the first coil is in a cooling mode of operation, and, supply the cooling medium to the second coil when the second coil is in a cooling mode of operation,
a variable speed heating pump to supply the heating medium to the first coil when the first coil is in a heating mode of operation, and, supply the heating medium to the second coil when the second coil is in a heating mode of operation, and
a mode control unit operable to switch the first coil or the second coil from the cooling mode of operation to the heating mode of operation by switching a fluid moving through the first coil or the second coil from the cooling medium to the heating medium, and the mode control unit is further operable to switch the first coil or the second coil from the heating mode of operation to the cooling mode of operation by switching the fluid moving though the first coil or the second coil from the heating medium to the cooling medium.