Method and apparatus for detecting impurity deposits in flow-through water heaters

摘要

Methods and apparatus to detect impurities in flow-through water heaters (100) are disclosed. An example apparatus includes a flow-through water heater (100) having a conduit (105) to conduct a fluid flowing therethrough, a heating element (110) extending around at least a portion of the conduit (105), and first and second temperature measuring elements (120, 125) to determine respective first and second temperatures (T1, T2) at different locations on the conduit (105); and a computing unit (700) to at least detect an impurity deposit (115) in the conduit (105) based on a first difference between the first and second temperatures (T1, T2).