Liquid expansion type temp controller

The utility model relates to a liquid expansion type temperature controller, which is suitable for controlling the temperature of a heated medium on a heating appliance. A temperature adjusting mechanism is composed of an adjusting screw rod, a nut, a panel, a limiting cam, and a backup ring or a pressure spring, wherein, the nut is riveted and fixed on the panel, the limiting cam is arranged on the end part of a screw thread of the adjusting screw rod and is fixed by the backup ring or the pressure spring. In this way, the utility model is both suitable for the processability of parts and can reach the cooperation requirement of assembly dimension among parts. In addition, the assemblage is convenient. The utility model has the advantages that structure is compact, volume is small, the accuracy and stability in use of the temperature adjustment of the temperature controller can be assured, etc.