摘要 |
A method and a fluid tap device for retaining the temperature of a liquid, in a liquid distribution system having at least one liquid conduit extending from a liquid source to a liquid tap. After completion of a tapping operation and replacing the liquid with gas in the conduit, the refilling of liquid in the conduit is performed in three steps:
a first step, initiated by activating the tap thereby causing a change of a physical variable which propagates backwards along the conduit and initiates a second step,the second step involving refilling the conduit with liquid from the source, while permitting remaining gas to escape via a gas passage separate from a liquid passage in the tap, anda third step, initiated when the liquid reaches the tap, involving opening the passage and permitting the liquid to flow out via the passage and through the tap. |