Microfluidic chip and detection system

A microfluidic chip, comprising a fluid inlet channel and a microvalve, the microvalve comprising a magnetic valve core, a valve core movement channel and a magnetic control device;

• wherein the valve core movement channel is provided with at least two adapter openings, and at least one of the at least two adapter openings is connected to the fluid inlet channel;
• the magnetic valve core is located in the valve core movement channel and is movable in the valve core movement channel, and a radial size of the magnetic valve core is greater than a radial size of each adapter opening;
• the magnetic control device is located outside the valve core movement channel, and is configured to move along the valve core movement channel to drive the magnetic valve core to move in the valve core movement channel;
• wherein the microvalve further comprises a positioning magnetic body, and the positioning magnetic body is located at each adapter opening and is configured to position the magnetic valve core between each adapter opening through a magnetic force when the magnetic valve core reaches each adapter opening;
• the positioning magnetic body further configured to be arranged independently from the chip body and detachably installed on the surface of the chip body, or configured to be fixed to the edge of the adapter opening of the valve core movement channel.