Coaxial double-control thermostatic valve core

The utility model discloses a coaxial double-control constant-temperature valve element which comprises a shell, a base, a movable ceramic chip, a static ceramic chip, a water passing base, a piston,a thermosensitive element, a water temperature adjusting knob and a flow adjusting knob. The base is matched with an opening in the bottom of the shell; the water passing seat, the movable ceramic chip and the static ceramic chip are sequentially matched in the shell from top to bottom; the water temperature adjusting knob is rotatably installed in the shell, the upper end of the water temperatureadjusting knob extends upwards to form a water temperature adjusting rod penetrating out of the shell, the lower end of the water temperature adjusting knob is in threaded connection with a pushing block, the piston and the thermosensitive element are matched in the mixed water cavity, and the pushing block and the thermosensitive element are in linkage fit with the piston; the flow adjusting knob is rotatably arranged on