Method and device for controlling turbines in order to control output pressures

Abstract

The invention discloses a method and a device for controlling turbines in order to control output pressures. The method for controlling the turbines includes steps of S00, enabling anesthesia machines or respirators to enter output pressure control modes; S10, judging whether the anesthesia machines or the respirators enter the output pressure control modes for the first time or not, executing a step S20 if the anesthesia machines or the respirators enter the output pressure control modes for the first time, or executing a step S70 if the anesthesia machines or the respirators do not enter the output pressure control modes for the first time; S20, inflating airways by the aid of the turbines at preset lowest rotation speeds and detecting the ventilation time; S30, judging whether the ventilation time is equal to a preset ventilation time threshold value or not, executing a step S40 if the ventilation time is equal to the preset ventilation time threshold value, or executing the step S20 if the ventilation time is not equal to the preset ventilation time threshold value; S40, detecting internal pressure values of the airways; S50, computing required second rotation speeds of the turbines when internal pressures of the airways are increased from the original zero and then are equal to preset target pressures P by the aid of the turbines; S60, enabling the turbines to rotate at the second rotation speeds so as to inflate the airways; S70, judging whether the internal pressure values of the airways are equal to the preset target pressures P or not; S80, enabling the anesthesia machines or the respirators to enter expiration stages; S90, judging whether the output pressure control modes are terminated or not, and enabling the anesthesia machines or the respirators to enter next ventilation periods if the output pressure control modes are not terminated.

Description

Technical field [0001] The present invention relates to the field of medical equipment, and more specifically, to a turbine control method and its control device aiming at controlling output pressure. Background technique [0002] In current medical equipment, in order to reduce the size of the equipment and at the same time reduce the dependence on external air compressors, medical equipment such as ventilators and anesthesia machines that use turbines as a means of providing compressed air are becoming more and more popular. However, in the prior art, due to insufficient software control algorithms, in general, the turbine always works at a higher speed. That is to say, the excess output pressure is provided through the additional high speed, and the excess pressure exceeding the target pressure is balanced by the method of venting. For example, the turbine speed is divided into 4 speeds according to the entire turbine speed range from low to high, and the specific speed that ...

AI Technical Summary

Problems solved by technology

[0003] Although the above turbine control method with the goal of controlling the output pressure realizes the control of the output pressure, the cost of hardware control is relatively high due to the addition of a proportional valve in the system.

At the same time, since the turbine is always in a state of relatively high-speed operation, for such a mechanical structure, the wear and tear is relatively large, resulting in a short

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