Mixer for insertion into a rotor of a centrifuge

A mixing device comprising:

• a centrifuge including a rotor;
• and
• a mixer inserted into the rotor of the centrifuge, the mixer including:
• a mixing trough;
• an obstacle device including at least one obstacle arranged to influence a flow of a liquid present in the mixing trough;
• and
• a restorer arranged to generate a restoring force that acts in an opposite direction of at least one component of a centrifugal force generated by a rotation of the rotor;
• wherein
• in response to the rotation of the rotor, a spacing between at least one wall section of the mixing trough and the obstacle device is variable such that a liquid that is present in the mixing trough flows around the at least one obstacle of the obstacle device;
• in a first phase and at a first angular velocity of the rotor, a first value of the component of the centrifugal force acting in an opposite direction of the restoring force is greater than a value of the restoring force;
• in a second phase and at a second angular velocity of the rotor, a second value of the component of the centrifugal force acting in the opposite direction of the restoring force is less than the value of the restoring force;
• a first spacing between the at least one wall section of the mixing trough and the obstacle device is greater in the first phase than a second spacing between the at least one wall section of the mixing trough and the obstacle device in the second phase;
• in the first phase, the liquid that is present in the mixing trough at least partially flows around the at least one obstacle of the obstacle device in a first direction;
• and
• in the second phase, the liquid that is present in the mixing trough at least partially flows around the at least one obstacle device in a second direction that is opposite to the first direction.