IMPROVEMENTS IN, AND RELATING TO, THERMO-SYPHONS

摘要

A two-phase, thermo-syphon apparatus, with outer and inner surfaces (1, 2, and 3) which define an enclosure (2'), can be used for several purposes, including a cooking utensil such as a saucepan. An evaporable fluid, in its liquid and vapour states, is retained in the enclosure. In its liquid state (5) said fluid is in substantial thermal contact with a heated surface. Vapour (6), from said fluid, flows towards the cooler parts of said surfaces (1, 2 or 3) where it condenses into liquid. These cooler parts of surface are thus heated by the latent heat of condensation of vapour (6) to a temperature which is effectively constant everywhere in the enclosure. A variety of means are provided for giving a signal depending upon the pressure or temperature state of vapour (6). The signal can be used for indicating this state, or for controlling the heat transferred to the said heated surface.