Patent ID: 8646441
Filing Date: 2014-02-11
Classification: F24B

Abstract:
1. A smoke box for a domestic heating appliance using solid fuel, comprising: a front wall, a rear wall, and a pair of side walls; a furnace defined within a lower portion of said smoke box for burning solid fuel; a single wall attached to and extending substantially horizontally along a first portion of its length from said rear wall toward said front wall, serving as an upper wall of said furnace, and terminating at a free end portion adjacent to but short of said front wall so as to define a narrow inlet passage between said free end portion of said wall and said front wall, a second portion of said single wall also extending in an upwardly inclined manner so as to effectively serve as a deflector for combustion gases and smoke generated within said furnace whereby said combustion gases and smoke will be directed toward said narrow lower inlet passage; an upper outlet defined within a substantially central portion of said upper wall of said smoke box; an outlet pipe fluidically connected to said upper outlet so as to permit the exhaust of said combustion gases and smoke out from said smoke box; and a horizontally disposed separating partition interposed between said narrow inlet passage and said upper outlet, wherein a front portion of said separating partition comprises at least one removable thermal insulating block, while a rear portion of said separating partition comprises a catalytic converter, said catalytic converter being disposed in an offset manner, toward said rear wall of said smoke box, with respect to said narrow inlet passage disposed near said front wall and said upper outlet; wherein a deflector is disposed adjacent to said upper outlet, and is inclined downwardly toward said front wall of said smoke box so as to serve as a baffle for said combustion gases and said smoke emanating from said catalytic converter and flowing toward said upper outlet and said outlet pipe; such that the flow path of the combustion gases and smoke extends in a serpentine manner from said furnace, upwardly through said narrow inlet passage disposed near said front wall, around said free end portion of said wall and back toward said rear wall, upwardly through said catalytic converter, around the deflector and out through said upper outlet and said outlet pipe.