| 摘要 |
<p>Heat exchange or circulation apparatus comprising a system of pipes 12 connected to an inlet 13 and an outlet 14 for circulation of water or virtually incompressible liquid through the system, where heat is transferred through the pipe walls, and the circulation in the apparatus is periodically interrupted, after which continued heat transfer through the pipe walls brings about freezing of the liquid to ice in the pipes. Two first parts 15 of the system are relatively heat- insulated or shielded against flowing cold air in order to achieve delayed freezing of the water in these parts in relation to the freezing to ice of the liquid in the other, uninsulated parts of the system, which are located between the first two parts, in such a manner that the build-up of ice in the other parts towards the ends of these which are connected to the two first parts will result in increased pressure in the unfrozen liquid in the insulated parts of the system, which increased water pressure is relieved by the two first parts each being connected by means of insulated branch pipes 17, 16 to a closed insulated pressure relief or absorption member 16A so as thus to avoid bursting of the pipes in any part of the system. <IMAGE></p> |
