Patent ID: 8302675

Claim:
A safety heat exchanger for combining a heat pump with a device of a drinking water supply facility for obtaining heat from drinking water, comprising a primary circulation loop ( 4 ) with drinking water, a secondary circulation loop ( 6 ) containing antifreeze as a material that does not pose a health risk, and a tertiary circulation loop ( 7 ) with a coolant, wherein the primary circulation loop ( 4 ) includes an inlet ( 3 ) connected to a drinking water supply facility and an outlet ( 5 ) with electrically controllable magnetic valves ( 16 ), wherein the secondary circulation loop ( 6 ) and tertiary circulation loop ( 7 ) each have a dedicated difference pressure monitor ( 9 , 18 ), which difference pressure monitors ( 9 , 18 ) are controllably connected with the magnetic valves ( 16 ) such that when the difference pressure monitors ( 9 , 18 ) detects a pressure difference in the secondary circulation loop ( 6 ) and/or in the tertiary circulation loop ( 7 ), the inlet ( 3 ) and the outlet ( 5 ) of the drinking water to the drinking water facility are closed, wherein the difference pressure monitor ( 9 ) of the secondary circulation loop ( 6 ) comprises an expansion vessel ( 11 ), a safety valve ( 12 ) and a manometer ( 13 ).