Respiratory based on air -blower

Technical Field

The utility model pertains to the field of medical ventilators, in particular relates to a blower-based of the respiratory system.

Background Art

Currently, the traditional the breathing control system is a blower, respirator control system driving software and hardware control the blower rotation, thereby generating the pressure needed for the treatment of patients. The performance of the breathing machine of relatively better, they will be according to the patient's respiration signal pressure adjustment in a timely manner, to ensure stability and the pressure control of the therapeutic effect. During acceleration of the motor intake system ensure the treatment pressure is stable, expiration of the blower speed reduction reduce the system pressure, so as to avoid patient exhaled carbon dioxide and to ensure that can not be removed from the comfort of use. The acceleration and deceleration of the blower time is very short, this high performance requirement of the blower.

It is this type of conventional respirator due to the adoption of a single blower control mode, in order to guarantee the stability of the pressure treatment, of the acceleration, deceleration, resulting in shortened service life of the blower, respirator is not stable power consumption of the system. Furthermore, in the use of the single blower control pressure at the time of deceleration, pressure there will be overshoot phenomenon, thereby reducing the user's comfort and therapeutic effect. Therefore, the service life of the valve, to stabilize its power consumption, improve the user's comfort is technical focus of the respirator.

Content of the utility model

The utility model provides a blower of the respiratory system, the double blower, the blower control system real-time monitoring respiratory in the pipeline of the gas path flow valve for switching, the specific technical scheme is as follows:

A based on the blower of the respiratory system, including the blower, blower control system, with respiratory pipeline to the respiratory mask, characterized in that the blower is two, suction blower and a blower, respectively output suction pressure and exhalation pressure; said blower control system comprises a main control chip MCU, suction blower drive control unit, the expiratory air blower driving control unit; two blower is provided with a gas valve, the gas-way valve to the breathing line, respiratory pipeline is provided with a flow sensor, the flow sensor is connected with the signal processing unit; the connecting relationship of a circuit: MCU are respectively connected with the suction blower drive control unit, the expiratory air blower driving control unit, the air channel valve drive control unit, the signal processing unit.

Further: respiratory pipeline is also provided with a pressure sensor, the pressure sensor is connected with the signal processing unit, the MCU perform real-time monitoring of the pressure in the pipeline and PID control is stable pressure.

The above-mentioned blower-based control method of the respiratory system, characterized in that

A, in the initial stage, the respiratory system is powered on, MCU drive control unit through the suction blower, exhalation air blower driving control unit controls the two blower begins to rotate, the air channel valve drive control unit actuation air course valve to make the two blower and respiration pipeline are in connected state, at the same time, flow sensor acquisition signal to the signal processing unit, then feedback to the MCU for monitoring;

B, the user wear a breathing mask, according to the flow sensor value MCU, to the flow rate signal for processing and judge, if at this moment the suction state, the drive moves the air course valve to make the breath blower and respiration pipeline is in the off state, and adjust the suction blower power, to provide suction pressure; if at this moment as a breath state, the drive moves the air course valve to make the suction blower and respiratory line is in the off state, and adjust the breath blower power, to provide a pressure.

Furthermore, in the course of system operation, in the pipeline of the respiratory pressure sensor collects the pressure value to a signal processing unit, according to the collected real-time pressure value MCU, PID control stability of the suction pressure or expiratory pressure.

Therefore, the utility model to the deficiency of the prior art, provides a kind of pressure control accurate, stable power consumption and increase the service life of the blower and control method thereof of the respiratory system. Through the control 2 a blower rotation, using the flow sensor detecting user's respiratory flow signal, respiratory state judging in real time, according to the user's inhalation and exhalation breath state to drive the gas path the opening and closing of the valve, in the course of providing treatment for ultimately required suction pressure and expiratory pressure. This kind of pressure is completed through the switching gas circuit valve, not only can improve the service life of the motor, the stabilization system power consumption, and more precisely control the pressure of the, greatly improves the comfort of the respiratory system.

Description of drawings

Figure 1 is the overall frame patterning of specific embodiment of the respiratory system of the present utility model;

Figure 2 is the control flow chart of a particular embodiment of the control method of the present utility model.

Figure: 101-MCU, 102-suction blower drive control unit, 103-path valve-drive control unit, 104-breath air blower driving control unit, 105-suction blower, 106-exsufflation blower, 107-path valve, 108-flow sensor, 109-pressure sensor, 110-the signal processing unit, 111-respiration pipeline, 112-respiratory mask.

Mode of execution

Using the Figures and specific embodiment to further illustrate the utility model.

With reference to Figure 1, the utility model adopts the double blower control system, which comprises a main control chip MCU101, suction blower drive control unit 102, the air channel valve drive controlling unit 103, exhalation air blower driving control unit 104, suction blower 105, breath blower 106, gas valve 107, the flow sensor 108, the pressure sensor 109, the signal processing unit 110, respiratory line 111, respiratory mask 112. Blower using DC brushless electric fan.

Figure 1 in the air supply channel of the respiratory system, which mainly relates to the working principle of the suction and the exhalation gas path at the time of opening and closing of the valve control. Respiratory system when energized and to begin treatment, Figure 1 in both of the blower according to the system the set PWM begins to rotate, and actuation air course valve 107 so that the blower corresponding to the open air. Then the MCU   101 reads the value of the flow rate sensor, and the flow rate signal for processing and judge, at this time the suction state, driving gas path valve to make the blower 105 corresponding to the air passage is opened and turn the blower 106 corresponding passage, at this moment a respiratory mask will produce the corresponding end of the suction phase the high pressure support; this time as a breath state, driving gas path valve to make the blower 106 corresponding to the air passage is opened and turn the blower 105 corresponding passage, at this moment will be produced corresponding respiratory mask with the aspirated phase support of lower pressure. Through the air channel valve 107 switching, so as to form different wind pressure, the air, one for treating air pressure, aspirated, one of the low wind pressure. The pressure of the respiratory system is the gas path by switching the valve 107 complete, not only can improve the service life of the motor, the stabilization system power consumption, and the more precise the control of the pressure, thereby greatly improving the respirator comfort.

See Figure 2 of the control flow chart, starting, MUC control suction blower drive control unit 102, the expiratory air blower driving control unit 104 to send separately power parameter PMW1, PMW2 to suction blower, as shown in Figure 1 of the respiratory system, suction blower and the exhalation valve share a gas blower, the suction blower is located in, the lower part of the exhalation air blast is located in, the suction state of the default initial state, the upper part of the drive valve is opened, flow sensor acquisition breathing gas flow in a pipeline, according to the read flow value, the signal processing unit determines the phase of the respiratory waveform, if the suction phase, maintains the drive valve is in the open state of the above, if Q inspired, below the driving the valve open, valve closed above, at the same time, the real-time reading of the pressure sensor the pressure in the pipeline P value of breathing, pressure PID control, maintain the pressure is stable and controllable.

The above-mentioned process is a main circulation process, PID control of the pressure, of the phase of the respiratory waveform to judge and the corresponding step.