AIR TO FUEL RATIO ADJUSTMENT DEVICE FOR SEALED-COMBUSTION TYPE FIREPLACES

摘要

A sealed-combustion chamber fireplace includes a combustion air to fuel adju stment device comprising an primary air-fuel mixing body having a fuel source inlet at one end and at least one combustion air inlet port disposed through a wall portion of th e body. The air- fuel mixture body may be configured in the form of an air-fuel venturi, burn er tube and the like to effect mixing together of the air and fuel to form a combustible air -fuel mixture. An air inlet port cover is movably disposed adjacent the air-fuel mixing body a nd forms an adjustable air combustion aperture by placement of the cover adjacent the ai r inlet port. Movement of the cover about the body effects opening or closing of the apert ure, thereby effecting adjustment of the primary air to fuel ratio of the air-fuel mixtur e combusted in the combustion chamber. A cover arm is attached to the cover and an actuator arm is movably attached to the cover arm to facilitate adjustment of the aperture, thereby, permitting adjustment of the flame appearance during operation of the fireplace from a position outside of the fireplace.