Particle analyzers and particle test control methods and devices thereof

A particle analyzer, said analyzer comprising:

• a reaction cell, where a sample is diluted, said reaction cell comprising an anode electrode, a liquid inlet tube, a liquid outlet tube and a liquid discharging tube, said liquid discharging tube having a liquid discharge valve which switches between a close status and an open status based on a control signal;
• a counting system, which comprises a counting cell, said counting system counting the sample injected into the counting cell and outputting a pore voltage;
• a liquid addition system, which acquires the diluted sample from the reaction cell and injects the acquired diluted sample into the counting cell;
• a signal processing and control apparatus, which acquires the pore voltage, and shapes and recognizes signals;
• is configured to control the liquid discharge valve of the reaction cell to be in the close status so as to maintain a residual diluted sample in the reaction cell after the liquid addition system acquires the diluted sample from the reaction cell and injects the acquired diluted sample into the counting cell;
• monitors pore blocking based on the pore voltage during the counting, suspends a next sample test and performs an unblocking operation when the pore blocking occurs, wherein the unblocking operation comprises supplying an electric current between the anode electrode and the cathode electrode to burn foreign matter blocking a pore;
• and
• controls the liquid addition system to acquire and inject the diluted sample to the counting cell again after the unblocking operation, and re-counts the sample in the counting cell by impedance method.

A method particle test control method of particle analyzer, said method comprising:

• controlling a sample acquisition system to acquire a sample in a test location;
• injecting the sample into a reaction cell to obtain a diluted sample;
• controlling a liquid addition system to acquire the diluted sample from the reaction cell, inject part of the diluted sample to a counting cell and keep a residual diluted sample in the liquid addition system;
• counting the sample in the counting cell by impedance method, and monitoring whether a pore blocking event occurs during counting;
• suspending a sample test and performing an unblocking operation when a pore blocking event occurs;
• and
• controlling the liquid addition system to inject the residual diluted sample into the counting cell after the unblocking operation, and re-counting the sample in the counting cell by impedance method.