US 12,366,370 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 Jan. 16, 2023, as Appl. No. 18/154,971.
Application 18/154,971 is a continuation of application No. 17/143,802, filed on Jan. 7, 2021, granted, now 11,555,618.
Application 17/143,802 is a continuation of application No. 16/148,293, filed on Oct. 1, 2018, granted, now 10,890,341, issued on Jan. 12, 2021.
Application 16/148,293 is a continuation of application No. 14/752,346, filed on Jun. 26, 2015, granted, now 10,088,178, issued on Oct. 2, 2018.
Claims priority of provisional application 62/157,109, filed on May 5, 2015.
Prior Publication US 2023/0296270 A1, Sep. 21, 2023
Int. Cl. F24F 3/00 (2006.01); F24D 5/04 (2006.01); F24F 3/044 (2006.01); F24F 3/048 (2006.01); F24F 11/83 (2018.01); F24F 11/84 (2018.01); F24F 11/85 (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 11/84 (2018.01); F24F 11/85 (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)] 7 Claims
OG exemplary drawing
 
1. An air conditioning unit, comprising:
a housing that encloses:
a zone duct attachment to provide the supply air from the supply air inlet to a coil used to heat or cool air entering a zone, wherein the zone comprises a portion of space to which heated or cooled air is provided,
the coil to heat the supply air to a zone when the coil is in a heating mode of operation and to cool the supply air to the zone when the coils is in a cooling mode of operation,
a hot gas reheat coil for reducing a humidity of supply air received through the supply air inlet,
a variable speed cooling pump to supply a cooling medium to the coil when the coil is in a cooling mode of operation,
a variable speed heating pump to supply the heating medium to the coil when the coil is in a heating mode of operation, and
a mode control unit operable to switch the coil from the cooling mode of operation to the heating mode of operation by switching a fluid moving through the coil from the cooling medium to the heating medium, and the mode control unit is further operable to switch the coil from the heating mode of operation to the cooling mode of operation by switching the fluid moving though the coil from the heating medium to the cooling medium.