Patent ID: 7100599

Claim:
A tray ration heating system, comprising: a reservoir open at a top thereof to receive rations and immerse said tray rations in hot water; a heat exchanger for supplying heat to said reservoir, said heat exchanger comprising a firebox at one end of said reservoir having an opening at one end to receive a burner flame tabe, and open along atop which faces an underside of said reservoir, said fire box having an opening at an opposite end to deliver heated gases from said burner along the underside of said reservoir to an opposite end of said reservoir, a main channel communicating with said opening extending the length of said reservoir underside, said main channel including a first plurality of baffles for introducing a tortuous path to hot gases moving through said main channel towards said opposite end of said reservoir; first and second auxiliary channels adjacent to said main channel for directing hot gases exiting said main channel along the underside of said reservoir towards said fire box; third and fourth auxiliary channels each adjacent to one of said first and second auxiliary channels for directing hot gases exiting said first and second auxiliary channels towards said opposite end of said reservoir; an exhaust channel communicating with said third and fourth auxiliary channels and extending along a vertical wall of said reservoir for directing said hot gases along said vertical wall to an exhaust opening, said exhaust channel having a second plurality of baffles for laterally displacing said hot gases; an insulated outer liner for supporting said reservoir and heat exchanger, said insulated outer liner having a lid which closes said reservoir tap during heating, said outer liner having an opening for receiving a burner flame tube which extends into said firebox; and a pair of supports connected to said liner.