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Electric resuscitator mode control devices and methods thereof

A mode control and motor control technology, applied in respirator and other directions, can solve the problems of increasing movement mechanical limit, unsmooth breathing, unreliable operation, etc., to achieve the effect of improving control accuracy, effective gas exchange, and overcoming discomfort

Inactive Publication Date: 2008-11-26
BEIJING AEONMED
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  • Abstract
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AI Technical Summary

Problems solved by technology

Although this method ensures that the tidal volume and inspiratory time meet the requirements, the patient can obviously feel the change of the airflow when inhaling, which makes the breathing unsmooth
And this implementation method must ensure both the tidal volume and the ventilation time, and these two factors are contradictory. If the control is not good, only one of them can be guaranteed.
[0005] The electric electronically controlled ventilator with screw drive structure can achieve constant flow rate ventilation in VCV mode, but the screw drive structure is complicated, the cost is high, and the operation is unreliable. In addition, it is necessary to increase the movement mechanical limit

Method used

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  • Electric resuscitator mode control devices and methods thereof
  • Electric resuscitator mode control devices and methods thereof
  • Electric resuscitator mode control devices and methods thereof

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Embodiment Construction

[0020] Hereinafter, the method of the present invention will be described in detail with reference to the accompanying drawings.

[0021] First, find the relationship between the motor operating speed and the displacement of the piston. figure 1 It is a physical model diagram of the crank connecting rod mechanism showing the relationship between the motor running speed and the piston displacement.

[0022] Such as figure 1 As shown, first analyze the physical model as follows, let the slider (piston) stroke be X, the crank length be R, the connecting rod length be L, the slider (piston) linear velocity be V, the slider (piston) acceleration be a, The moving time of the slider (piston) is t, ω is the rotational angular velocity of the motor, and θ is the rotation angle of the crank in the crank-link mechanism, then the following mathematical formula can be obtained:

[0023] X = R cos θ + (...

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PUM

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Abstract

The invention discloses a mode control device and a method thereof for an electric respirator, the device comprises: a motor; a motor control part, which controls the rotational speed of the motor; a crank link mechanism, which can be rotatablely connected with the motor by a connecting shaft, and the crank link mechanism is connected with a piston. The rotational speed of the motor is constantly changed by the motor control part, thus ensuring the piston to have the constant speed. The device adopts the control algorithm to ensure the running speed of the piston to be constant, thus realizing the ventilation with the constant flow rate, overcoming the discomfort of a patient caused by the constant change of the flow rate, leading the patient to effectively carry out the gas exchange and improving the control precision.

Description

technical field [0001] The invention relates to an electric ventilator mode control device and a method thereof. Background technique [0002] VCV (Volume Controlled Ventilation) breathing mode is to generate positive pressure by the ventilator when inhaling, and send the preset volume of gas into the lungs within the set time, and the airway pressure increases; when exhaling, the gas in the lungs is close to the chest and lungs Elastic recoil, out of the body, airway pressure lowered. [0003] At present, the electronically controlled ventilator that uses a crank-link mechanism to drive the piston is relatively complicated to control because the movement of the motor shaft and the movement of the piston are nonlinear. [0004] When the electronically controlled ventilator that uses the crank-link mechanism to drive the piston realizes the VCV breathing mode, most of them use the motor to move at a constant speed, and the whole movement curve of the piston is a sinusoidal c...

Claims

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Application Information

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IPC IPC(8): A61M16/00
Inventor 邓咏如闫国平金文贤
Owner BEIJING AEONMED
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