US 11,920,805 B2
Systems and methods for air temperature control using A2L refrigerants
Douglas Notaro, Cypress, TX (US); Masahiro Honda, Cypress, TX (US); Mark Kendall, Tomball, TX (US); Hiroshi Yoh, Cypress, TX (US); Yenny Natali Martinez, Houston, TX (US); Patrick Wang, Katy, TX (US); Roberto Flores, Cypress, TX (US); and Timmy Ta, Cypress, TX (US)
Assigned to Goodman Manufacturing Company LP, Waller, TX (US)
Filed by Goodman Manufacturing Company LP, Waller, TX (US)
Filed on Feb. 1, 2021, as Appl. No. 17/164,575.
Prior Publication US 2022/0243938 A1, Aug. 4, 2022
Int. Cl. F24F 11/36 (2018.01); F24F 11/77 (2018.01); F24F 11/88 (2018.01); F24F 110/65 (2018.01)
CPC F24F 11/36 (2018.01) [F24F 11/77 (2018.01); F24F 11/88 (2018.01); F24F 2110/65 (2018.01)] 20 Claims
OG exemplary drawing
 
1. A system for controlling air temperature in a building, the system comprising:
an outdoor unit disposed outside the building;
an indoor unit disposed inside the building, the indoor unit comprising:
a heat exchanger that uses an A2L refrigerant;
a blower disposed within the indoor unit;
an indoor control board electrically coupled to the blower and the outdoor unit;
one or more A2L sensors configured to detect an amount of the A2L refrigerant in the indoor unit;
a transformer; and
an A2L control board electrically coupled to the transformer, the one or more A2L sensors, the indoor control board and the blower, wherein the A2L control board is configured to receive power from the transformer;
wherein:
the A2L control board includes a first relay disposed between the transformer and the indoor control board, wherein the blower and the outdoor unit receive power from the A2L control board via the indoor control board when the first relay is closed;
the A2L control board includes a second relay disposed between the transformer and the blower, wherein the blower receives power from the A2L control board when the second relay is closed, and
each of the one or more A2L sensors comprises a bus connector input, a bus connector output, a sensor relay electrically disposed between the bus connector input and the bus connector output, and a sensor feedback port electrically disposed between the sensor relay and the bus connector output.