The cleaning device comprises a cleaning
pool, a cleaning cavity and a flushing channel are defined by the cleaning
pool, the inner circumference of the cleaning
pool comprises a first face and a second face which are oppositely arranged in the first direction, and the flushing channel is provided with a flushing opening communicated with the cleaning cavity. The
reagent needle is suitable for extending into the cleaning cavity and located between the first face and the second face, the first
peripheral wall, close to the flushing opening in the first direction, of the
reagent needle is suitable for facing the flushing opening, and the second
peripheral wall, away from the flushing opening in the first direction, of the
reagent needle is suitable for facing the second face. One part of the liquid discharged from the flushing port can reach the first
peripheral wall, and the other part of the liquid can reach the second peripheral wall after impacting the second surface. According to the cleaning device, the cleaning effect on the peripheral wall surfaces of the two sides of the reagent needle in the first direction can be achieved only through one flushing channel and one flushing opening. Therefore, the cleaning device is convenient to use and high in cleaning efficiency.