Peristaltic pump control system for purifying blood and method thereof

Abstract

The invention discloses a peristaltic pump control system for purifying blood and a method thereof, which relate to a haemodialysis machine component. The peristaltic pump control system comprises a control circuit and a motor driving circuit, wherein the output end of the control circuit is connected with the input end of the motor driving circuit; the first input end of the control circuit is connected with the signal output end of a position sensor; and the second input end of the control circuit is connected with the signal output end of an angular speed sensor. The rotating speed of a peristaltic pump can be adjusted rapidly, so that the rotating speed of the peristaltic pump is stable, and the phenomenon of reflowing during use is avoided; the rotating speed of the peristaltic pump is kept stable, so that loss of the peristaltic pump is reduced, and the service life of the peristaltic pump is prolonged; and moreover, the peristaltic pump control system further has the characteristics of freeness from pollution, high accuracy, high sealing property and the like.

Description

Technical field [0001] The invention relates to a part of a hemodialysis machine, in particular to a peristaltic pump control system and method for blood purification. Background technique [0002] Peristaltic pumps are widely used in blood purification equipment due to their non-pollution, high precision, and good sealing properties. The conventional peristaltic pump control system can only adjust the cumulative speed of the peristaltic pump running for one week, but cannot adjust the angular speed of the peristaltic pump. [0003] The traditional peristaltic pump is limited by its structure. When the pump runs to different angles, the resistance it receives is inconsistent, causing its speed to be not very stable. Therefore, the pump will generate a pulse flow during operation, which makes the pressure in the pipeline change greatly. At the same time, the pulse flow generated by the peristaltic pump will have a backflow phenomenon, which will affect the stability of the pressure...

AI Technical Summary

Problems solved by technology

The conventional peristaltic pump control system can only adjust the accumulative speed of the peristaltic pump for one cycle, and cannot adjust the angular velocity of the peristaltic pump.

[0003] The traditional peristaltic pump is limited by the structure. When the pump is running at different angles, the resistance it receives is inconsistent, resulting in an unstable speed. Therefore, the pump will generate a pulse flow during operation, which will cause a large change in the pressure in the pipeline. The pulsating flow generated by the peristaltic pump also appears backflow phenomenon, which affects the stability of the pressure and flow in the pump tube, easily exceeds the alarm line of the blood purification equipment, and affects the comfort of the patient's treatment.

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