A BOILER MOUNTED IN A VENDING MACHINE FOR DELIVERY OF WARM DRINKS

摘要

A machine for vending warm drinks selectively (a) by extracting extractable ingredients and (b) by dissolving soluble ingredients comprises an apparatus for supplying both hot water for extracting and warm water for dissolving. A tank for holding a supply of warm water is separated from a substantially smaller second tank for holding a supply of hot water by a heat-conducting wall. An electrical heating coil in the second tank is provided with a thermostatic control responsive to the water temperature in the second tank for maintaining said water temperature slightly below the boiling point. Means are provided for maintaining the transfer of heat from the second tank to the first tank at rate such as to maintain a water temperature of 70 DEG -75 DEG C. in the first tank when the water temperature in the second tank is slightly below the boiling point. A valve-controlled outlet is provided for withdrawing hot water from the second tank for extracting, and a separate valve-controlled outlet is provided for withdrawing warm water from the first tank for dissolving.