Electric water heater

Claim 1

A WATER HEATING COMPRISING A HEAT EXCHANGER HAVING MEANS DEFINING A WATER FLOW PATH THERETHROUGH AND MEANS FOR HEATING THE WATER IN SAID FLOW PATH, A BASE PLATE REMOVABLY CARRYING SAID HEAT EXCHANGER AND FORMED WITH A WATER INLET DUCT AND AN OUTLET CONNECTED RESPECTIVELY TO THE ENDS OF SAID FLOW PATH, A FLOW SENSING MEMBER COMPRISING A LOWER CHAMBER FORMED BY A CAVITY IN SAID BASE PLATE AND AN UPPER CHAMBER REMOVABLY FROM SAID LOWER CHAMBER, SAID CHAMBERS BEING SEPARATED BY A FLEXIBLE DIAPHRAGM AND COMMUNICAING WITH DIFFERENT LOCALITIES OF SAID INLET DUCT, MEANS LOCATED IN SAID INLET DUCT FOR CREATING A PRESSURE DIFFERENT BETWEEN SAID DIFFERENT LOCALITIES WHEN WATER IS FLOWING IN SAID INLET DUCT WHEREBY SAID CHAMBERS ARE SUBJECTED TO DIFFERENT PRESSURES RESPECTIVELY AND SAID DIAPHRAGM IS DEFLECTED, MEANS ACTUATED BY THE DEFLECTION OF SAID DIAPHRAGM FOR ACTIVAING THE HEATING MEANS OF SAID HEAT EXCHANGER TO HEAT THE WATER IN SAID FLOW PATH, CONNECTING MEANS IN SAID BASE PLATE COMMUNICATING WITH THE END OF SAID FLOW PATH THAT IS CONNECTED TO SAID INLET DUCT AT A LOCATION DOWNSTREAM FROM SAID FLOW SENSING MEMBER, SAID CONNECTING MEANS HAVING AN EXTERIORLY OPEN END, A REMOVABLY CLOSURE MEMBER NORMALLY CLOSING SAID OPEN END, AND MEANS REPLACING SAID REMOVABLY CLOSURE MEMBER FOR SUPPLYING CLEANING LIQUID TO SAID CONNECTING MEANS, SAID CLEANING LIQUIUD SUPPLYING MEANS BEING INSERTABLE IN SAID THROUGH END SO AS TO BLOCK THE FLOW OF CLEANING LIQUID THROUGH THE INLET DUCT IN A DIRECTION TOWARD SAID FLOW SENSING MEMBER WHEREBY CLEANING LIQUID IS PASSED THROUGH SAID HEAT EXCHAMGER AND BYPASSES SAID FLOW SENSING MEMBER.