| 摘要 |
<p>Heat exchanging or circulation apparatus comprising a system of conduits (12) connected to an inlet (13) and an outlet (14) for circulating water or other practically incompressible liquid through the system, heat being transferred through the conduit walls, circulation in said apparatus being periodically shut off, whereupon continued heat transfer through the conduit walls causes freezing of the liquid to ice in the conduits. Two first portions (15) of said system are relatively heat-insulated or shielded from flowing cold air to obtain delayed freezing of water in said portions in relation to the freezing of the liquid to ice in uninsulated second portions of said system located between said first two portions so that ice growing in said second portions towards the ends thereof being in communication with said two first portions will result in an increased pressure on the unfrozen liquid in said insulated portions of the system, said increased water pressure being relieved by having said two first portions each connected through insulated branch conduits (17, 16) with a closed insulated pressure relief (16A) or absorbing means so as to avoid rupture of the conduits in any portion of the system.</p> |
