초록 ▼

An air-cleaning, heat-exchange apparatus includes a main housing portion connected by means of an air inlet fan to the kitchen exhaust stack of a restaurant. The apparatus includes an in-line series of three heat exchangers through which a heat-absorptive fluid is circulated, simultaneously, by mean

An air-cleaning, heat-exchange apparatus includes a main housing portion connected by means of an air inlet fan to the kitchen exhaust stack of a restaurant. The apparatus includes an in-line series of three heat exchangers through which a heat-absorptive fluid is circulated, simultaneously, by means of a suitable fluid pump. These heat exchangers remove exhaust gas heat and further transfer this heat to a stream of air, such as that from a cold-air return duct. Due to the fact that the hot exhaust gas is heavily grease laden, grease will be deposited on virtually all internal surfaces of the apparatus which this exhaust gas contacts. The apparatus includes means for spraying exhaust gas contacted internal surfaces, as well as the hot exhaust gas itself, with a detergent solution in which the grease is soluble, thereby removing grease buildup from these internal surfaces. Although some of the grease will be drained off by a liquid carrier resulting from the spraying at a first stage, any remaining emulsified grease, detergent solution and moisture will be eliminated from its gaseous carrier by means of a mist eliminator which is located downstream from the first stage.

대표청구항 ▼

An air-cleaning, heat-exchange apparatus having means defining a flow path for removing grease and extracting heat from grease-laden, hot exhaust of a restaurant exiting from said restaurant by way of an exhaust stack, said air-cleaning, heat-exchange apparatus comprising: a spiralled arrangement of

An air-cleaning, heat-exchange apparatus having means defining a flow path for removing grease and extracting heat from grease-laden, hot exhaust of a restaurant exiting from said restaurant by way of an exhaust stack, said air-cleaning, heat-exchange apparatus comprising: a spiralled arrangement of metal tubing disposed in the flow path of said hot exhaust and rotatable about an axis which is substantially parallel with the flow direction of said hot exhaust, said spiralled arrangement being adapted for circulation of a heat-exchange working fluid therethrough and the exterior of said spiralled arrangement providing a contaminant-collecting surface; means for circulating a heat-exchange working fluid through said spiralled arrangement and between said spiralled arrangement and a location of utilization; a source of chemical solution wherein the grease of said grease-laden, hot exhaust is soluble to said chemical solution; spray nozzle means directed at a first end of said spiralled engagement of metal tubing for dissolving grease buildup on the external, contaminant-collecting surface of said spiralled arrangement of metal tubing, said first end being disposed for being first contacted by the flow of said hot exhaust, and pump means for providing pulses of said chemical solution to said spray nozzle means.