HVAC system flame sensor
AssigneeJohnson Controls Tyco IP Holdings LLP
InventorThomas D. Chase
Life of this patent
Estimating the term…
Abstract
A flame sensor for a furnace of a heating, ventilation, and air conditioning (HVAC) system includes a sensor body and an electrically conductive member of the sensor body. The electrically conductive member is configured to be disposed within a flame region of a burner of the furnace and configured to receive electrical current from a controller of the furnace. The flame sensor also includes an anti-oxidation coating disposed on an outer surface of the electrically conductive member and configured to transmit the electrical current from the electrically conductive member. The anti-oxidation coating is configured to contact a flame produced by the burner and expose the electrical current to the flame.
Claims20
A flame sensor for a furnace of a heating, ventilation, and air conditioning (HVAC) system, comprising:
- a sensor body;
- an electrically conductive member of the sensor body, wherein the electrically conductive member is configured to be disposed within a flame region of a burner of the furnace and configured to receive electrical current from a controller of the furnace;
- and
- an anti-oxidation coating disposed on an outer surface of the electrically conductive member and configured to transmit the electrical current from the electrically conductive member, wherein the anti-oxidation coating is configured to contact a flame produced by the burner and expose the electrical current to the flame, and wherein the anti-oxidation coating comprises a noble metal.
A furnace, comprising:
- a burner configured to produce a flame within a flame region of the burner;
- and
- a flame sensor coupled to the burner, wherein the flame sensor comprises:
- an electrically conductive member disposed within the flame region of the burner, wherein the electrically conductive member is configured to receive electrical current from a controller of the furnace, and the electrically conductive member is formed from a first metallic material;
- and
- an anti-oxidation coating disposed on an outer surface of the electrically conductive member and configured to transmit the electrical current from the electrically conductive member, wherein the anti-oxidation coating is formed from a second metallic material comprising a noble metal, and the anti-oxidation coating is configured to contact the flame produced by the burner and expose the electrical current to the flame.
A flame sensing system for a furnace of a heating, ventilation, and air conditioning (HVAC) system, comprising:
- a flame sensor configured to be disposed within a flame region of a burner of the furnace, wherein the flame sensor comprises:
- a main body portion formed from a metallic material and configured to receive electric current from a controller of the furnace;
- and
- an anti-oxidation coating formed on an outer surface of the main body portion, wherein the anti-oxidation coating is formed from a noble metal and is configured to transmit the electric current from the main body portion.
Dependencies are inferred from the claim text.