CN101757711A - Ventilator and method for controlling pressure slope thereof - Google Patents
Ventilator and method for controlling pressure slope thereof Download PDFInfo
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- CN101757711A CN101757711A CN200810239486A CN200810239486A CN101757711A CN 101757711 A CN101757711 A CN 101757711A CN 200810239486 A CN200810239486 A CN 200810239486A CN 200810239486 A CN200810239486 A CN 200810239486A CN 101757711 A CN101757711 A CN 101757711A
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- motor
- respirator
- valve
- inlet valve
- pressure ramp
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Abstract
The invention provides a ventilator, comprising an inspiratory valve. The inspiratory valve comprises a valve body (4), a valve core (5), which is positioned in the valve body (4) and can rotate opposite to the valve body (4) and a stepping motor (3), wherein an output shaft of the stepping motor (3) is fixed and connected with the valve core (5); the casing of the stepping motor (3) is fixed and connected with the valve body (4); and the stepping motor (3) drives the valve core (5) to change the opening of the inspiratory valve. The invention also provides a method for controlling the pressure slope in a ventilator. The ventilator is the ventilator mentioned above. The controlling method comprises the following steps: at the inspiration stage, a controller of the ventilator controls CPU to output clock pulses corresponding to angles of rotation of the stepping motor (3); the stepping motor (3) responds to the output clock pulses, so as to rotate the valve core (5) of the inspiratory valve, thereby changing the opening of the inspiratory valve and realizing pressure slope. The invention has low cost and little pressure loss.
Description
Technical field
The present invention relates to a kind of respirator, and the method for controlling pressure ramp in this respirator
Background technology
The main method that realizes pressure ramp at present in respirator is to pass through the size of coil current in the adjusting proportioning valve to change proportioning valve latus rectum size in inspiratory duration, promptly changes the size of inspiratory flow.And on the respirator that does not adopt proportioning valve as inlet valve, then can't adopt this mode to carry out the control of pressure ramp.The present invention solves this problem from aspects such as hardware, structure and softwares, thereby the expiratory phase that is suitable for conditions of patients pressure waveform is provided, to avoid that to greatest extent patient's pulmonary is caused damage.
Summary of the invention
The present invention is devoted to overcome the above-mentioned defective of prior art just and makes.The method that the objective of the invention is to propose a kind of respirator and control pressure ramp in this respirator, cost of the present invention is low, and pressure loss is little.
For solving the problems of the technologies described above, the invention provides a kind of respirator, comprising: inlet valve, this inlet valve comprises: valve body; Spool is located in the valve body and also can be rotated with respect to valve body; And motor, an output shaft of motor is fixedlyed connected with spool, and the housing of motor is fixedlyed connected with valve body, and motor actuatable valve core is to change the aperture of inlet valve.
Preferably, motor has double output shaft, one of them output shaft is fixedlyed connected with spool, and another output shaft is fixed with the brake sack that can rotate synchronously with spool, and brake sack is electrically connected with the controller of respirator by the photoelectrical coupler on the housing of being located at motor.
The present invention also provides a kind of method of controlling pressure ramp in this respirator, and respirator is the above respirator, and this control method comprises: in expiratory phase, and the corresponding clock pulses number of corner of the controller of respirator control CPU output and motor; The clock pulses of motor response output changes the aperture of inlet valve with the spool that rotates inlet valve, to realize pressure ramp.
Preferably, when the difference of rise time of pressure ramp and its setting-up time during greater than permissible value, the controller adjustment of respirator is in order to the clock pulses number of control step motor, changing the aperture of inlet valve, and then the rise time on controlled pressure slope.
Preferably, the setting-up time of pressure ramp is smaller or equal to inspiratory duration.
According to the invention has the beneficial effects as follows: control mode is simple, only need can realize in the number that expiratory phase is regulated the clock pulses of stepper motor driver, and Financial cost is lower, the degree of regulation of pressure ramp is realized easily, overall structure is simple, and its stability and reliability all are guaranteed easily.The present invention can be widely used in occasion restricted to the flow adjustment process and that require.
Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is for to the claimed further instruction that the invention provides.
Description of drawings
Accompanying drawing is formed the part of this description, with helping further understand the present invention.These accompanying drawings illustrate some embodiments of the present invention, and can be used for illustrating principle of the present invention with description.In the accompanying drawing:
Fig. 1 is the control flow that the user controls pressure ramp in the respirator of the present invention;
Fig. 2 is the pairing pressure ramp figure of the different opening of inlet valve;
Fig. 3 is the sketch map that inlet valve in the respirator of the present invention is shown;
Fig. 4 and Fig. 5 are the rise time at set different pressures slope, the pressure rising waveform sketch map of measurement.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.Identical in the accompanying drawings parts are represented with identical label.
Respirator of the present invention comprises inlet valve, with reference to Fig. 3 this inlet valve is described, this inlet valve comprises: valve body 4, be located at the spool 5 in the valve body 4, motor 3, wherein motor 3 is the motor with double output shaft among the present invention, an output shaft of this motor 3 is fixedlyed connected with spool 5, another output shaft is fixed with brake sack 2, brake sack 2 can rotate synchronously with spool 5 under the driving of motor 3, valve body 4 is sheathed on the spool 5 and with the housing of motor 3 fixedlys connected, when motor 3 drives the aperture that can change inlet valve when spool 5 rotates with respect to valve body 4.And, the end corresponding to brake sack 2 at motor 3 is equipped with photoelectrical coupler 1, the light that selectively light emitting diode sends in the shading light electric coupler 1 when motor 3 drives brake sacks 2 rotations, thereby brake sack 2 is electrically connected with the controller (not shown) of respirator by the photoelectrical coupler on the housing of being located at motor 31, and the angular signal of motor can be fed back to the controller of respirator.
The control principle of pressure ramp is as follows in the respirator of the present invention: because the size of inlet valve aperture depends on the corner size of motor 3, the corner size of motor 3 depend on again clock pulses number what, the therefore pressure ramp of the controllable number system respirator by the control clock pulses.With reference to figure 3, when gas when the inlet end of valve body 4 flows into valve pocket, this moment, inlet valve was in closed condition, drive stepping motor 3 rotations this moment, motor 3 drives spool 5 and brake sack 2 rotates synchronously, when brake sack 2 rotates to the signal that makes photoelectrical coupler 1 when changing, stipulate that this position is the starting point of motor 3.When motor 3 rotates to a certain angle, inlet valve is in the critical point of opening and closing, when continuing drive stepping motor 3 again, the aperture of inlet valve begins to increase gradually, reaching regulation up to aperture requires the back slack, make pressure reach desired value like this, thereby realize the pressure ramp in the respirator in the pressure rise time of setting.
The present invention also provides a kind of method that is used for control breathing machine pressure ramp, wherein, this respirator is aforesaid the present invention respirator required for protection, describe the method for pressure ramp in the control breathing machine of the present invention in detail in conjunction with Fig. 2 and Fig. 3: configure the clock pulse frequency that is received of stepper motor driver, the pressure rise time in the setting pressure slope (this time must be less than or equal to inspiratory duration); When air-breathing, parameters such as the compliance of the patient's that utilization has been measured lung and resistance, and according to calculate required gas initial flow rate when this section pressure rise time, internal pressure reached goal pressure, and then calculate the aperture and the required clock pulses output number of inlet valve, wherein, the clock pulses number of output is corresponding with the corner of motor 3; The controller of respirator control CPU processor is exported corresponding umber of pulse and is given stepper motor driver then, 3 rotations of driver drives motor, motor 3 rotates the aperture of the spool 5 change inlet valves of inlet valve, make inlet valve reach predetermined aperture and realize setting pressure required gas flow rate under the rise time, regulate thereby finish a pressure ramp.For pressure ramp whether meet the demands can be by judging pressure ramp the actual rise time and the difference of its setting-up time whether judge greater than permissible value, if smaller or equal to permissible value then realized pressure ramp, be that pressure ramp control finishes, if greater than permissible value, then adjust pulse number, and return the aperture of calculating pulse number and inlet valve, and so forth up to realizing required pressure ramp.In addition, can utilize the segmentation function of stepper motor driver to reduce motor vibration and noise when rotated, also reduce the pressure oscillation that when the pressure uphill process, is produced simultaneously.
In expiratory phase, the aperture of inlet valve has determined the size of inspiratory flow and pressure, and Fig. 1 shows when aperture changes, the situation that the air-breathing rise time reduces with the increase of aperture, otherwise then opposite, wherein, P is the pressure of inspiration(Pi) of respirator among Fig. 1; T is the pressure rise time of pressure ramp.At setting the different pressures slope rise time (smaller or equal to inspiratory duration), the pressure rising waveform sketch map of measurement as shown in Figure 4 and Figure 5.Wherein, S express time, cmH
2O represents atmos: centimeter water column; LPM represents flow velocity unit: rise/minute.
Although the present invention is illustrated with reference to accompanying drawing and preferred embodiment, obviously, for a person skilled in the art, under the prerequisite that does not deviate from the spirit and scope of the present invention, can make various changes and variation to the present invention.Various change of the present invention, the content that changes by appending claims and equivalent thereof contain.
Claims (5)
1. respirator comprises: inlet valve,
It is characterized in that described inlet valve comprises:
Valve body (4);
Spool (5) is located in the described valve body (4) and also can be rotated with respect to described valve body (4); And
Motor (3), an output shaft of described motor (3) is fixedlyed connected with described spool (5), the housing of described motor (3) is fixedlyed connected with described valve body (4), and described motor (3) drives described spool (5) to change the aperture of described inlet valve.
2. respirator according to claim 1, it is characterized in that, described motor (3) has double output shaft, one of them output shaft is fixedlyed connected with described spool (5), another output shaft is fixed with the brake sack (2) that can rotate synchronously with described spool (5), and described brake sack (2) is electrically connected with the controller of described respirator by the photoelectrical coupler on the housing of being located at described motor (3) (1).
3. a method that is used for control breathing machine pressure ramp is characterized in that, described respirator is the described respirator of above-mentioned each claim, and described control method comprises:
In expiratory phase, the corresponding clock pulses number of corner of the controller of respirator control CPU output and motor (3);
The clock pulses of the described output of described motor (3) response changes the aperture of described inlet valve with the spool (5) that rotates inlet valve, to realize described pressure ramp.
4. the method that is used for control breathing machine pressure ramp according to claim 3, it is characterized in that, when the difference of rise time of described pressure ramp and its setting-up time during greater than permissible value, the controller adjustment of described respirator is in order to control the clock pulses number of described motor (3), changing the aperture of inlet valve, and then control the rise time of described pressure ramp.
5. the method that is used for control breathing machine pressure ramp according to claim 4 is characterized in that the setting-up time of described pressure ramp is smaller or equal to inspiratory duration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810239486A CN101757711A (en) | 2008-12-11 | 2008-12-11 | Ventilator and method for controlling pressure slope thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810239486A CN101757711A (en) | 2008-12-11 | 2008-12-11 | Ventilator and method for controlling pressure slope thereof |
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| Publication Number | Publication Date |
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| CN101757711A true CN101757711A (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810239486A Pending CN101757711A (en) | 2008-12-11 | 2008-12-11 | Ventilator and method for controlling pressure slope thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397610A (en) * | 2010-09-07 | 2012-04-04 | 北京航天长峰股份有限公司 | Method for adjusting gradient of slope under anesthesia machine and breathing machine pressure control |
| CN104874057A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Respirator fault detection method and system |
-
2008
- 2008-12-11 CN CN200810239486A patent/CN101757711A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397610A (en) * | 2010-09-07 | 2012-04-04 | 北京航天长峰股份有限公司 | Method for adjusting gradient of slope under anesthesia machine and breathing machine pressure control |
| CN102397610B (en) * | 2010-09-07 | 2015-03-25 | 北京航天长峰股份有限公司 | Method for adjusting gradient of slope under anesthesia machine and breathing machine pressure control |
| CN104874057A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Respirator fault detection method and system |
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Application publication date: 20100630 |