Phase-change composite constant-temperature layer and water cup

The utility model belongs to the technical field of constant-temperature layers, and discloses a phase-change composite constant-temperature layer and a water cup. The phase-change composite constant-temperature layer is of a cylindrical structure and comprises a phase-change sleeve layer and heat dissipation fins arranged in the phase-change sleeve layer, the number of the heat dissipation fins is multiple, the multiple heat dissipation fins are arranged in the circumferential direction of the phase-change sleeve layer at intervals, and the heat dissipation fins extend in the radial direction of the phase-change sleeve layer on the cross section of the phase-change composite constant-temperature layer. The phase-change composite constant-temperature layer is high in cooling efficiency, and the requirement that a user wants to drink warm water quickly can be met. 本实用新型属于恒温层技术领域，公开了一种相变复合恒温层及水杯。该相变复合恒温层呈筒状结构，该相变复合恒温层包括相变套层和设置在相变套层内的散热翅片，散热翅片设有多个，多个散热翅片沿相变套层的周向间隔设置，且在相变复合恒温层的横截面上，散热翅片沿相变套层的径向方向延伸。该相变复合恒温层的降温效率高