Flow cell and liquid chromatographic unit having same

A flow cell, comprising:

• a housing defining an installation cavity;
• a cell core arranged in the installation cavity and provided with a liquid channel, a liquid feed recess, and a liquid discharge recess therein, wherein the liquid feed recess and the liquid discharge recess are formed at opposite sides of the cell core, and two ends of the liquid channel are respectively connected to the liquid feed recess and the liquid discharge recess;
• a liquid-core waveguide fitted in the liquid channel and configured to circulate liquid and to propagate light;
• an inlet connection assembly, comprising:
• an inlet press block pressed against an end of the cell core provided with the liquid feed recess;
• a liquid feed tube penetrating through the inlet press block and in communication with the liquid feed recess;
• and
• a light entering tube penetrating through the inlet press block and in communication with the liquid feed recess;
• and
• an outlet connection assembly pressed against an end of the cell core provided with the liquid discharge recess, wherein the outlet connection assembly is provided with a light exit hole facing towards the liquid discharge recess, in such a manner that light passes through the light entering tube, the liquid feed recess, the liquid-core waveguide, the liquid discharge recess, and the light exit hole sequentially to exit the installation cavity,
• wherein the inlet connection assembly further comprises:
• a pre-tensioning part arranged in the installation cavity and located at a side of the inlet press block facing away from a liquid feed port, wherein an elastic member is provided between the pre-tensioning part and the inlet press blocks to achieve sealing abutment among the cell core, the inlet press block and the outlet connection assembly.