Microfluidic chip

A microfluidic chip having a rotation center and a reagent output structure, the reagent output structure comprising:

• a reagent storage chamber, a first centrifugal-force flow channel, and a delay unit,
• wherein the delay unit comprises a first turning flow channel, a capillary-force flow channel, a second turning flow channel, and a second centrifugal-force flow channel, the first centrifugal-force flow channel extends away from the rotation center after being led out from the reagent storage chamber, one end of the first turning flow channel is in communication with the first centrifugal-force flow channel, and another end of the first turning flow channel is in communication with one end of the capillary-force flow channel, the capillary-force flow channel extends close to the rotation center after being led out from the first turning flow channel, one end of the second turning flow channel is in communication with another end of the capillary-force flow channel, and another end of the second turning flow channel is in communication with the second centrifugal-force flow channel, the second centrifugal-force flow channel extends away from the rotation center after being led out from the second turning flow channel, the first centrifugal-force flow channel has a first discharge microfluidic valve, and the second centrifugal-force flow channel has a second discharge microfluidic valve;
• wherein a plurality of reagent output structures are provided, the plurality of reagent output structures surround the rotation center and are distributed at intervals, at least one reagent output structure comprises a plurality of delay units, the plurality of delay units are communicated successively, the first turning flow channel of a latter delay unit is in communication with the second centrifugal-force flow channel of a former delay unit, wherein at least one reagent output structure has a different number of delay units as compared to other reagent output structures;
• and
• the microfluidic chip further comprising a second area distributing chamber and a plurality of reaction chambers, wherein the second area distributing chamber extends around the rotation center and is in communication with the plurality of reagent output structures, the plurality of reaction chambers are in communication with the second area distributing chamber, respectively, and distances from the reagent output structure, the second area distributing chamber, and each reaction chamber to the rotation center gradually increase.