Pipetting method of pipetting head device

Abstract

The invention discloses a pipetting method of a pipetting head device, wherein the pipetting method comprises the following steps: parameters of the liquid sucking and spraying amount, the sucking andspraying height and the liquid level detection in each gas replacement piston mechanism are respectively set, and a distance between the gas replacement piston mechanisms is set; the electrical control mechanism controls the gas replacement piston mechanisms to move to the position where an unused pipetting head is stored so as to fix a pipetting head on a piston body assembly; the electrical control mechanism controls the gas replacement piston mechanisms to move and adjusts the distance between the gas replacement piston mechanisms to conduct liquid suction and spraying actions; and the used pipetting head moves into a collection box and the pipetting head is withdrawn. According to the invention, each gas replacement piston mechanism is adopted to independently control the suction andspraying amount, the suction and spraying height and the liquid level detection of the liquid, and the distance between the gas replacement piston mechanisms is adjustable through a piston distance adjusting structure, so that the diversified precise control of pipetting is effectively met, the structure is simple, and the maintenance is easy.

Description

technical field [0001] The invention relates to the technical field of medical experiment operations, and more particularly relates to a liquid pipetting method of a liquid pipetting head device. Background technique [0002] The pipette head in the prior art includes two types of gas displacement pistons and liquid displacement pistons, wherein the distance between the gas displacement pistons is not adjustable, and all the pistons share a driving structure, and there is no liquid level detection function, and only simple The liquid separation work cannot realize the liquid transfer of diverse needs. [0003] For some imported pipetting heads, liquid displacement pistons are usually used, and each piston communicates with the piston pump inside the pipetting device through a pipeline. Although it meets the diversified needs of pipetting to a certain extent, this type of liquid The structure of the pipetting head for replacing the piston is complex, the purchase cost is hig...

AI Technical Summary

Problems solved by technology

[0002] The pipette head in the prior art includes two types of gas displacement pistons and liquid displacement pistons, wherein the distance between the gas displacement pistons is not adjustable, and all the pistons share a driving structure, and there is no liquid level detection function, and only simple Liquid separation work, unable to achieve liquid transfer for diverse needs

[0003] For some imported pipetting heads, liquid displacement pistons are usually used, and each piston communicates with the piston pump inside the pipetting device through a pipeline. Although it meets the diversified needs of pipetting to a certain extent, this type of liquid The structure of the pipetting head for replacing the piston is complex, the purchase cost is high, and the liquid replacement piston needs frequent maintenance, which is prone to leakage or blockage of the pipeline joint, bubbles inside the pipeline affect the accuracy, and the internal liquid of the pipeline needs to be replaced every day, etc. aspects of the problem

Images