Direct fired absorption machine flue gas recuperator

Claim 1

A recuperator for an absorption refrigeration system having a direct-fired generator, a condenser, an absorber, and an evaporator, the recuperator comprising: a housing secured to the direct fired generator; a first inlet means and first outlet means formed in said housing, said first inlet means having side walls, a top wall, and a bottom wall, one of said side walls having an aperture therethrough to receive combustion gas flowing from the direct-fired generator, the bottom wall having aperture means therethrough for discharging the received combustion gas, said first outlet means including a blower for drawing the combustion gas from said first inlet means through said housing to said outlet means; a means for conducting a cooling fluid through said housing, said cooling fluid conducting means defining a flow path having an inlet, an outlet, side walls, a top wall, a bottom wall, and an intermediate anti-turbulence screen disposed between said top wall and said bottom wall and generally parallel thereto, whereby two opposite side walls have a partition perpendicular therebetween defining a weir spaced between said bottom wall and said anti-turbulence screen to divert said cooling fluid from said inlet through said anti-turbulence screen; and conduit means sealingly aligned with the aperture means of the bottom wall of said first inlet means, said conduit means having an aperture formed therein to define a flow path for the combustion gas to flow from said first inlet means through said cooling fluid and out said first outlet means to a flue.