Sheathed fiberglass heater wire

Abstract

An apparatus is disclosed. The apparatus includes a resistive wire having a circumference. The apparatus further includes a first fiberglass layer disposed about the circumference of the resistive wire and along a length of the resistive wire. The apparatus further includes a second fiberglass layer. The apparatus further includes a third fiberglass layer, the second fiberglass layer disposed between the first fiberglass layer and the third fiberglass layer, the third fiberglass layer forming an outer layer and surrounding the second fiberglass layer.

1 - 18 . (canceled) 
     
     
         19 . An apparatus comprising:
 a resistive wire having a circumference;   a first fiberglass layer disposed about the circumference of the resistive wire and along a length of the resistive wire;   a second fiberglass layer;   a third fiberglass layer, the second fiberglass layer disposed between the first fiberglass layer and the third fiberglass layer, the third fiberglass layer forming an outer layer and surrounding the second fiberglass layer;   a lead wire crimped onto the resistive wire, thereby reducing tangling of the resistive wire and the lead wire with one or more of the first fiberglass layer, the second fiberglass layer, and the third fiberglass layer, the lead wire configured to supply a current to the resistive wire; and   a cold zone defined at least in part by a portion of the lead wire and a portion of the resistive wire, the cold zone formed by a short circuit created when one or more metal wires contact at least the portion of the resistive wire.   
     
     
         20 . The apparatus of  claim 19 , further comprising a fiberglass core, the resistive wire wound about the fiberglass core. 
     
     
         21 . The apparatus of  claim 19 , wherein the first fiberglass layer comprises an S-glass type fiberglass. 
     
     
         22 . The apparatus of  claim 19 , wherein the first fiberglass layer comprises a fiberglass material different than a fiberglass material of the second fiberglass layer. 
     
     
         23 . The apparatus of  claim 20 , wherein the fiberglass core comprises an S-glass type fiberglass. 
     
     
         24 . The apparatus of  claim 19 , wherein the third fiberglass layer comprises a fiberglass material different than the first fiberglass layer and different than the second fiberglass layer. 
     
     
         25 . The apparatus of  claim 19 , further comprising a polyimide layer, the polyimide layer forming an outer layer and surrounding the third fiberglass layer. 
     
     
         26 . The apparatus of  claim 25 , wherein the polyimide layer comprises a polyimide film and silicone adhesive. 
     
     
         27 . The apparatus of  claim 19 , wherein the resistive wire, the first fiberglass layer, the second fiberglass layer, and the third fiberglass layer form at least a part of a heater wire, the heater wire configured to be disposed within a tube of a refrigeration system; and wherein the cold zone is configured to prevent ignition of a refrigerant of the refrigeration system. 
     
     
         28 . A method comprising:
 providing a heater wire disposed within a tube of a refrigeration system, the heater wire comprising: 
 a resistive wire having a circumference; 
 a first fiberglass layer disposed about the circumference of the resistive wire and along a length of the resistive wire; 
 a second fiberglass layer; 
 a third fiberglass layer, the second fiberglass layer disposed between the first fiberglass layer and the third fiberglass layer, the third fiberglass layer forming an outer layer and surrounding the second fiberglass layer; 
 a lead wire crimped onto the resistive wire, thereby reducing tangling of the resistive wire and the lead wire with one or more of the first fiberglass layer, the second fiberglass layer, and the third fiberglass layer, the lead wire configured to supply a current to the resistive wire; and 
 a cold zone defined at least in part by a portion of the lead wire and a portion of the resistive wire, the cold zone formed by a short circuit created when one or more metal wires contact at least the portion of the resistive wire; and 
   providing a current through the resistive wire to heat at least a portion of the refrigeration system.   
     
     
         29 . The method of  claim 28 , wherein the heater wire further comprises a fiberglass core, the resistive wire wound about the fiberglass core. 
     
     
         30 . The method of  claim 28 , wherein the first fiberglass layer comprises an S-glass type fiberglass. 
     
     
         31 . The method of  claim 28 , wherein the first fiberglass layer comprises a fiberglass material different than a fiberglass material of the second fiberglass layer. 
     
     
         32 . The method of  claim 29 , wherein the fiberglass core comprises an S-glass type fiberglass. 
     
     
         33 . The method of  claim 28 , wherein the third fiberglass layer comprises a fiberglass material different than the first fiberglass layer and different than the second fiberglass layer. 
     
     
         34 . The method of  claim 28 , wherein the heater wire further comprises a polyimide layer, the polyimide layer forming an outer layer and surrounding the third fiberglass layer. 
     
     
         35 . The method of  claim 34 , wherein the polyimide layer comprises a polyimide film and silicone adhesive. 
     
     
         36 . The method of  claim 28 , wherein the cold zone is configured to prevent ignition of a refrigerant of the refrigeration system. 
     
     
         37 . The method of  claim 36 , wherein the cold zone is positioned adjacent to a junction between the lead wire and the resistive wire, wherein the lead wire is crimped onto the resistive wire at the junction.