×

Air heating apparatus

  • US 9,816,425 B1
  • Filed: 06/10/2016
  • Issued: 11/14/2017
  • Est. Priority Date: 02/03/2010
  • Status: Active Grant
First Claim
Patent Images

1. An air heating apparatus comprising:

  • a housing having at least one inlet opening and at least one outlet opening such that air may flow along a path through an interior of the housing between said openings, the housing including an isolating wall dividing the interior of the housing into a primary chamber adjacent to the inlet opening and a secondary chamber adjacent to the outlet opening, the isolating wall isolating an interior of the secondary chamber from an interior of the primary chamber, a transfer opening being formed in the isolating wall and through which air on the path is forced to move to pass from the interior of the primary chamber into the interior of the secondary chamber;

    an air heating assembly positioned in the interior of the housing and configured to heat air moving along the path, the air heating assembly comprising;

    an engine in the primary chamber configured to rotate a drive shaft;

    a heat generator in the primary chamber and operatively connected to the engine to generate heat in a fluid from rotation energy from the engine;

    a main heat exchanger in the secondary chamber and in fluid communication with the heat generator to transfer heat generated by the heat generator to air flowing along the path;

    an engine exhaust heat recovery apparatus configured to transfer exhaust heat of the engine to the air flowing along the path; and

    an air movement assembly configured to move air along the path through the interior of the housing, the air movement assembly comprising a primary fan positioned along the path between the primary and secondary chambers to move air on the path from the primary chamber to the secondary chamber, the primary fan being positioned at the transfer opening wall such that operation of the primary fan pulls air from the primary chamber and pushes the air into the secondary chamber along the path and from the secondary chamber out of the housing through the outlet opening;

    wherein air moves from the primary chamber to the secondary chamber through only said transfer opening between the primary and secondary chambers to form a single said path for air flow from the inlet opening and the outlet opening through the housing;

    wherein the engine exhaust heat recovery apparatus comprises an exhaust heat exchanger, the heat exchanger being in fluid communication with the exhaust of the engine such that exhaust gases from the engine pass through the exhaust heat exchanger after exiting the engine.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×