A nucleic acid extractor, its injection device, and its control method

Abstract

The invention discloses a nucleic acid isolation machine, an injection device thereof and an injection device control method. The injection device comprises a fluid pipeline, a first piezoelectric actuator, a first pressure sensor and a control unit, wherein one end of the fluid pipeline is connected with a fluid supply pipeline, the first piezoelectric actuator is connected with the other end of the fluid pipeline, a hole for fluid to pass through is formed in the middle of the first piezoelectric actuator, and the fluid flowing into the fluid pipeline from the fluid supply pipeline flows out of the hole; the first pressure sensor is arranged on the side wall of the hole and used for detecting pressure value on the side wall of the hole when the fluid flows out of the hole; the control unit is used for sending out a control signal to control increase of the hole diameter by adjusting the voltage value of the first piezoelectric actuator when the value, detected by the first pressure sensor, of pressure on the side wall of the hole by the fluid is larger than a first preset threshold value. The technical problem that in the prior art, an injection device of the nucleic acid isolation machine sprays the solution at high speed to cause solution spill and then affect the nucleic acid extraction process is solved, and solution spatter is avoided.

Description

technical field [0001] The invention relates to the field of nucleic acid extraction, in particular to a nucleic acid extraction instrument, an injection device thereof, and a control method for the injection device. Background technique [0002] Nucleic acid extractor is an instrument that uses supporting nucleic acid extraction reagents to automatically complete the extraction of sample nucleic acid. Nucleic acid extractors are divided into two categories: one is large-scale automation, generally called automatic liquid workstation; the other is small The automatic nucleic acid extractor uses the packaged supporting reagents to automatically complete the extraction and purification process. Because of the high cost of equipment and high operating costs, large-scale automatic liquid workstations are suitable for extracting thousands of specimens of the same type at a time, so they are rarely used; while small automated instruments are widely used because of their low equipm...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is that the solution ejected by the injection device of the nucleic acid extractor in the prior art is fast and causes the solution to splash, which in turn affects the nucleic acid extraction process.

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