Sitting and lying appliance capable of accumulating heat and warming

The utility model discloses a sitting and lying appliance capable of accumulating heat and warming, which consists of a shell, a closed inner shell, a phase-change heat-accumulating material and a heat exchange tube. The sitting and lying appliance is internally provided with the closed inner shell which is internally filled with the phase-change heat-accumulating material; the heat exchange tube is embedded in the phase-change heat-accumulating material; and the inlet end and outlet end of the heat exchange tube are respectively connected with a heat source through pipelines. The sitting and lying appliance has the functions of accumulating heat and dissipating heat. In winter, a heat source in daytime stores the heat in the phase-change heat-accumulating material of the sitting and lying appliance through heat-transfer fluid and simultaneously dissipates the heat through the shell of the sitting and lying appliance, thereby keeping the contact surface of the sitting and lying appliance and human body at a c