US 12,435,900 B2
Control of discharge dewpoint for packaged terminal air conditioner
Bryan Isaac D'Souza, Louisville, KY (US); and Timothy Scott Shaffer, La Grange, KY (US)
Assigned to Haier US Appliance Solutions, Inc., Wilmington, DE (US)
Filed by Haier US Appliance Solutions, Inc., Wilmington, DE (US)
Filed on Oct. 11, 2023, as Appl. No. 18/484,948.
Prior Publication US 2025/0123017 A1, Apr. 17, 2025
Int. Cl. F24F 11/76 (2018.01); F24F 11/77 (2018.01); F24F 11/84 (2018.01); F24F 110/10 (2018.01); F24F 110/20 (2018.01)
CPC F24F 11/76 (2018.01) [F24F 11/77 (2018.01); F24F 11/84 (2018.01); F24F 2110/10 (2018.01); F24F 2110/20 (2018.01)] 18 Claims
OG exemplary drawing
 
1. An air conditioner unit comprising:
a refrigeration loop comprising an evaporator and a condenser;
a compressor operably coupled to the refrigeration loop and being configured to urge refrigerant through the refrigeration loop;
an expansion device fluidly coupled to the refrigeration loop;
an indoor fan operable to urge a flow of indoor air through the evaporator;
an auxiliary fan operable to urge a flow of outdoor air to combine with the flow of indoor air to produce a mixed airflow, wherein the auxiliary fan is a variable speed fan; and
a controller operably coupled to the compressor, the expansion device, the indoor fan, and the auxiliary fan, the controller being configured to:
operate the compressor at a first compressor speed;
operate the indoor fan at a first fan speed;
operate the auxiliary fan at a first auxiliary fan speed;
determine a dewpoint temperature of the mixed airflow;
determine that the dewpoint temperature of the mixed airflow is greater than a predetermined limit; and
implement a responsive action in response to determining that the dewpoint temperature of the mixed airflow exceeded the predetermined limit, wherein implementing the responsive action comprises decreasing a flow rate of the outdoor air by operating the auxiliary fan at a second auxiliary fan speed.