US 11,920,853 B2
Sheathed fiberglass heater wire
Maurizio Francesco Pasqual, San Luis Potosí (MX); Jose Jesus Reyes Soto, San Luis Potosí (MX); Alessandro Trevisol, San Luis Potosí (MX); and Pierpaolo Campeol, San Luis Potosí (MX)
Assigned to Zoppas Industries de Mexico S.A., de C.V., San Luis Potosí (MX)
Filed by Zoppas Industries de Mexico S.A., de C.V., San Luis Potosí (MX)
Filed on Feb. 27, 2023, as Appl. No. 18/175,014.
Application 18/175,014 is a continuation of application No. 15/880,417, filed on Jan. 25, 2018, abandoned.
Prior Publication US 2023/0280083 A1, Sep. 7, 2023
Int. Cl. H05B 3/54 (2006.01); B32B 1/08 (2006.01); B32B 17/06 (2006.01); F25D 21/08 (2006.01); H05B 1/02 (2006.01); H05B 3/46 (2006.01); H05B 3/48 (2006.01); H05B 3/56 (2006.01)
CPC F25D 21/08 (2013.01) [B32B 1/08 (2013.01); B32B 17/067 (2013.01); H05B 1/0227 (2013.01); H05B 3/46 (2013.01); H05B 3/48 (2013.01); H05B 3/56 (2013.01); B32B 2262/101 (2013.01); F25D 2321/1413 (2013.01); F25D 2400/02 (2013.01); F25D 2400/24 (2013.01); H05B 2214/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for a refrigeration system, the apparatus having a heater wire configuration comprising:
a resistive wire having a circumference;
a first fiberglass layer in contact with the resistive wire, the first fiberglass layer disposed about the circumference of the resistive wire and along a length of the resistive wire;
a second fiberglass layer comprising: an inner surface in contact with an outer surface of the first fiberglass layer; and an outer surface, the second fiberglass layer surrounding the first fiberglass layer; and
a third fiberglass layer comprising an inner surface in contact with the outer surface of the second fiberglass layer; and an exposed outer surface, the second fiberglass layer disposed between the first fiberglass layer and the third fiberglass layer, the third fiberglass layer forming an outermost fiberglass layer and surrounding the second fiberglass layer, the exposed outer surface of the third fiberglass layer configured to be exposed to a leaked refrigerant, wherein the heater wire configuration limits a maximum temperature of the exposed outer surface of the third fiberglass layer to less than or equal to 360 degrees Celsius and a leakage current of the apparatus to less than 0.07 mA when a current is passed through the resistive wire to heat at least a portion of the refrigeration system, thereby preventing ignition of the leaked refrigerant in contact with the exposed outer surface of the third fiberglass layer.