CN205885925U - Breathing machine of air -oxygen mixing control - Google Patents
Breathing machine of air -oxygen mixing control Download PDFInfo
- Publication number
- CN205885925U CN205885925U CN201620553002.8U CN201620553002U CN205885925U CN 205885925 U CN205885925 U CN 205885925U CN 201620553002 U CN201620553002 U CN 201620553002U CN 205885925 U CN205885925 U CN 205885925U
- Authority
- CN
- China
- Prior art keywords
- oxygen
- air
- gas circuit
- flow
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The utility model provides a breathing machine of air -oxygen mixing control, include: oxygen gas circuit, air gas circuit, oxygen air mixing chamber, oxygen, air gas circuit are connected to air oxygen mixing chamber, air oxygen mixing chamber gas outlet is equipped with gas outlet pressure sensor, be equipped with in the oxygen gas circuit: oxygen flow control valve, oxygen flow sensor and oxygen closure member still are equipped with obs core control ware and drive circuit, and obs core control ware, drive circuit, oxygen flow control valve, oxygen flow sensor connect gradually and loop in, oxygen flow sensor, drive circuit can give the obs core control ware with oxygen flow, voltage feedback respectively, form the two closed loop control system based on flow, voltage feedback, be equipped with in the air gas circuit: fan, air pressure adjusting valve, air mass flow sensor and air closure member. The utility model discloses a two closed loop control system based on oxygen flow and voltage realize that the governing speed is fast, the precision is high to the control of oxygen valve.
Description
Technical field
This utility model is related to the respirator that a kind of sky oxygen mixing controls, and belongs to respirator technical field.
Background technology
In current clinical medicine, respirator is as the effective means of an energy artificial substituting expiratory positive airway pressure function, general
All over for the respiratory failure caused by a variety of causes, the management of the anesthesia respiration during major operation, Breathing Suppotion treatment and emergency resuscitation
In, occupy highly important position in Modern Medical Field.Respirator is that one kind can play prevention and treatment respiratory failure,
Reduce complication, save and extend the vital armarium of patients ' lives.
Respirator in use it is necessary to mechanical ventilation is carried out to patient, for accept treat patient for,
The regulation of the control of ventilation size and oxygen concentration is very important, suffers from especially for infant patient and serious symptom of being critically ill
Person.Therefore need in respirator to arrange system, the accuracy of respirator hybrid control system and the spirit that empty oxygen mixing controls
Quick property, is one of important indicator of respirator performance, decides respirator performance rate.
Have in prior art as follows to the empty oxygen mixed control apparatus of respirator and the report of control method research:
Documents 1:cn104958817a disclose a kind of empty oxygen mixing device and the method for respirator；The sky of respirator
Oxygen mixing device, including trunnion, one end of trunnion is provided with air intlet and nozzle assembly, and the other end of trunnion is provided with gives vent to anger
Mouthful, nozzle assembly includes the big nozzle in embedded trunnion, is provided with little nozzle, little nozzle is provided with little spray orifice, little in big nozzle
Form the big spray orifice of annular, little nozzle can be along it axially in big nozzle between the inwall of the end of the outer wall of nozzle and big nozzle
Interior movement is to adjust the size of big spray orifice.Respirator in this documents operationally, inputs high pressure from described nozzle assembly
Oxygen, the negative pressure being produced when described nozzle assembly sprays using high pressure oxygen, suck the sky air from described air intlet
Gas, and mix with the high pressure oxygen of input；Adjust the size of described big spray orifice by mobile described little nozzle, when little nozzle
The inwall of the end of outer wall and big nozzle is conflicted, and when that is, the area of big spray orifice is zero, high pressure oxygen sprays from little spray orifice；When big
When the area of spray orifice is more than the area of little spray orifice, high pressure oxygen sprays from big spray orifice；It is mixed that high pressure oxygen and air are mixed to form
Close gas to export from gas outlet.This documents solve to provide a kind of by improve empty oxygen mixing device structure realize right
The regulation of empty oxygen flow and the method for control, specifically a kind of size by adjusting spray orifice realizes the regulation to flow and control
The method of system, it is adjusted and the method for control is not precisely and sensitive.
Documents 2:cn101507854b disclose a kind of respirator air mixing device with compressed air, described dress
Put including the source of oxygen being connected with empty oxygen mixer by connecting pipeline respectively and compressed air source, described source of oxygen and compression are empty
Source of the gas respectively pass through be successively set on the pressure maintaining valve each communicating between pipeline, choke valve is connected with empty oxygen mixer, described
Pressure reduction control device for controlling choke valve two ends pressure reduction is connected on two choke valves.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of sky oxygen mixing control and regulation speed is fast, precision is high
Respirator.
In order to solve above-mentioned technical problem, this utility model employs the following technical solutions:
There is provided the respirator that a kind of sky oxygen mixing controls, comprising: oxygen gas circuit, air gas circuit, oxygen air mixing chamber, institute
The inlet end stating oxygen gas circuit passes through oxygen source interface external hyperbaric oxygen source of the gas, and the inlet end of described air gas circuit passes through air source
The external air source of interface；Oxygen gas circuit, the outlet side of air gas circuit are connected to air oxygen mixing chamber；Air oxygen mixing chamber
Connect gas outlet pressure transducer, and connect to patient interface；
It is sequentially provided with described oxygen gas circuit: oxygen flow rate adjusting valve, oxygen flow sensor and oxygen closure member；
It is sequentially provided with described air gas circuit: blower fan, sort of air pressure adjusting valve, air flow sensor and air dam
Part；
Core controller and drive circuit, core controller, drive circuit, oxygen flow are additionally provided with described oxygen gas circuit
Regulating valve, oxygen flow sensor are sequentially connected, and form loop；Oxygen flow sensor, drive circuit respectively can by oxygen flow,
Voltage Feedback, to core controller, forms a double closed-loop control system based on flow, Voltage Feedback, realizes to oxygen flow
The control of regulating valve.
Further,
In described oxygen gas circuit, before oxygen flow rate adjusting valve, it is provided with high pressure oxygen gas pressure sensor；
Further,
In described air gas circuit, it is provided with blower fan gas outlet pressure transducer at fan outlet.
Further,
In described oxygen gas circuit, it is provided with high pressure oxygen filter in source of oxygen seam；
Further,
In described air gas circuit, it is provided with air filtration pieces in air source seam.
Further,
In described oxygen gas circuit, it is provided with oxygen current stabilization part after described oxygen flow rate adjusting valve；
Further,
In described air gas circuit, it is provided with air current stabilization part after described sort of air pressure adjusting valve.
Further,
In described oxygen gas circuit, between oxygen flux control valve and oxygen current stabilization part, it is provided with oxygen denoising device.
Preferably,
The pressure limit of described hyperbaric oxygen source of the gas is 0.276mpa～0.7mpa.
The operation principle of the respirator that above-mentioned sky oxygen mixing controls is as follows:
During respirator work,
1st, on the one hand, the oxygen gas circuit of respirator passes through oxygen source interface external hyperbaric oxygen source of the gas, hyperbaric oxygen bleed pressure
Scope is 0.276mpa～0.7mpa, and oxygen passed through oxygen source interface before entering hyperbaric oxygen pressure transducer, can first lead to
Cross entrance high pressure oxygen filter and carry out impurity and filter；Hyperbaric oxygen pressure transducer in oxygen gas circuit is used for detecting oxygen source pressure
Power, when oxygen source hypertonia, respirator sends oxygen supply hypertonia and reports to the police, and when oxygen source hypotony, respirator is sent out
Go out oxygen supply hypotony to report to the police；Enter oxygen flow rate adjusting valve afterwards, the oxygen flow rate adjusting valve in oxygen gas circuit is used for
Adjust the output of oxygen flow, the oxygen flow f1 by the regulation of this valve, needed for the expected mixed gas of output；
Afterwards, oxygen can also be reduced the pressure of high pressure oxygen output, kept away by the oxygen denoising device in oxygen gas circuit
Exempt to cause very big influence of fluctuations to the pressure of output at patient interface；Afterwards, oxygen passes through the oxygen current stabilization in oxygen gas circuit
Part；
Afterwards, the oxygen closure member that oxygen passes through in oxygen gas circuit again produces pressure reduction, meanwhile, oxygen stream in its rear and front end
Quantity sensor passes through the actual oxygen flow of differential pressure measurement in oxygen closure member front and back end for the measurement, due to arranging before oxygen closure member
Have oxygen current stabilization part, oxygen flow can be made stable so that oxygen closure member can the stable pressure reduction of bad student, so that oxygen flow is passed
The value of sensor collection is more accurate.
In order to obtain the output of target oxygen flow f1, the core controller in oxygen gas circuit exports a controlled quentity controlled variable to drive
Galvanic electricity road, drive circuit controls oxygen flow rate adjusting valve to adjust the output of oxygen flow after amplifying signal, and oxygen flow senses
The flow value f1 of device collection output simultaneously feeds back to core controller；Meanwhile, in order to accelerate the governing speed of oxygen flow rate adjusting valve,
Desired value f1 can rapidly be reached, control electric current is converted to voltage signal u1 and feeds back to core control by the valve of drive circuit
Device processed, core controller is according to algorithm set in advance to input quantity f1 fed back and u1 process, then output control amount
To drive circuit.Realize accurate to oxygen flow, rapidly adjust and control.
2nd, on the other hand, the air gas circuit of respirator pass through the external air source of air source interface, air enter blower fan it
Before first pass through air filtration pieces, filter the impurity of in the air；Air after filtering pressurizes through blower fan, then by being arranged on
The blower fan gas outlet pressure transducer of blower fan gas outlet, whether the pressure for detection blower fan output is normal, different when pressure
Chang Shi, respirator provides fan trouble to report to the police；
Afterwards, air passes through the sort of air pressure adjusting valve in air gas circuit again, and sort of air pressure adjusting valve can be according to giving vent to anger
Output pressure at the pressure sensing value of feedback real-time regulation patient outlet of mouth；Afterwards, air in air gas circuit for the air cuts
Stream part rear and front end produces pressure reduction, and meanwhile, air flow sensor is passed through measurement and surveyed by the pressure reduction of air closure member front and back end
Amount actual air flow.In order that air closure member rear and front end can produce stable pressure reduction, air flow sensor is made to adopt
The numerical value of collection is more accurate, can arrange air current stabilization part before air closure member, makes air draught stably rear air inlet
Closure member.
The air of air gas circuit is pooled to air oxygen mixing chamber with the oxygen of oxygen gas circuit, then by a gas outlet pressure
Force transducer, is finally coupled to patient interface.The gas outlet pressure transducer of respirator is used for measuring the pressure of respirator gas outlet
Power p, the sort of air pressure adjusting valve in air gas circuit adjusts the feedback pressure of the gas outlet pressure transducer according to respirator gas outlet
Real-time regulation output pressure reaches p value.
Above-mentioned sky oxygen mixing controls the empty oxygen mixing control method of respirator, specific as follows:
(1) set this respirator gas outlet output empty oxygen gas mixture expecting pressure as p it is contemplated that export oxygen concentration
For n, wherein n > 21%:
Sort of air pressure adjusting valve in air gas circuit adjusts the feedback of the gas outlet pressure transducer according to respirator gas outlet
Pressure real-time regulation output pressure reaches expecting pressure p value；
(2) set the air flow sensor in air gas circuit and measure air mass flow now as f2, air mass flow f2 is logical
Cross the pressure reduction gained that air flow sensor gathers air closure member front and back end, according to formula(this formula
Derivation based on general knowledge: 1) concentration of oxygen is equal to the total amount divided by mixed gas for the content of oxygen；2) oxygen content of in the air
For 21%), obtain the target oxygen flow needed for from air oxygen mixing chamber mixed gas out
In order to obtain the output of target oxygen flow f1, oxygen gas circuit is additionally provided with and is connected with oxygen flow rate adjusting valve
Core controller and drive circuit, core controller exports a controlled quentity controlled variable to drive circuit, after signal is amplified by drive circuit
Oxygen flow rate adjusting valve is controlled to adjust the output of oxygen flow, the actual oxygen flow f1 of oxygen flow sensor acquisition output is anti-
It is fed to core controller, form flow feedback control；Described actual oxygen flow f1 passes through oxygen flow sensor acquisition oxygen
The pressure reduction gained of the oxygen source of closure member front and back end；
Meanwhile, in order to accelerate the governing speed of valve, rapidly reach target oxygen flow f1, the valve of drive circuit will
Control electric current is converted to voltage signal and feeds back to core controller, forms Voltage Feedback and controls, and feedback voltage is u1；
Core controller is given to the actual oxygen flow f1 feeding back and voltage signal u1 process, then output control amount
Drive circuit, forms flow, Voltage Feedback double-closed-loop control；
(3) oxygen flow adjusts the oxygen flow that example valve records, the oxygen of real-time regulation output according to oxygen flow sensor
Throughput reaches desired value f1.
(4) when the oxygen flow of oxygen gas circuit output increases, the output pressure at respirator gas outlet also can increase therewith
Greatly, thus the output pressure value of respirator can deviate expecting pressure value p, now, repeat step (1) adjusts output pressure to pre-
Phase pressure value p, then repeat step (2) retrieve new target oxygen flow f1 ', will export followed by repeat step (3)
Flow-rate adjustment is to new target oxygen flow f1 '；
By dynamic circulation step (1)-(3), until the output pressure of respirator and oxygen concentration are it is anticipated that value stabilization
Output.
In above-mentioned steps (2), core controller is processed to the actual oxygen flow f1 and voltage signal u1 of feedback
One of which method is:
A, outer shroud are oxygen flow negative feedback: outer shroud controlling increment δ u (k)=a1×u(k)+a2×u(k-1)+a3×u
(k-2)；
Wherein, u (k)=f1-f1, it is target oxygen flow f1 and the deviation of the actual oxygen flow f1 of feedback；
a1=kp1+ki1+kd1；
a2=-kp1-2×kd1；
a3=kd1；
kp1For proportionality coefficient, ki1For integral coefficient, kd1For differential coefficient.
Then outer shroud output u (k)=u (k-1)+δ u (k)；
B, internal ring are negative voltage feedback: ibid, internal ring controlling increment δ d (k)=b1×d(k)+b2×d(k-1)+b3×d
(k-2)；
Wherein, d (k)=u (k)-u1, it is the deviation of outer shroud output u (k) and feedback voltage u1；
b1=kp2+ki2+kd2；
b2=-kp2-2×kd2；
b3=kd2；
kp2For proportionality coefficient, ki2For integral coefficient, kd2For differential coefficient.
Then internal ring output is output d (k)=d (k-1)+δ d (k) to drive circuit for the core controller.
In above-mentioned steps (2), core controller is processed to the actual oxygen flow f1 and feedback voltage u1 of feedback
Another kind of method is:
When patient starts air-breathing, the deviation of the actual oxygen flow f1 and target oxygen flow f1 generation of feedback is more than fair
When being permitted scope, start to adjust output oxygen flow；
First, the Voltage Feedback u of real-time detections, work as usWith us-1When deviation is larger, output d (k) of core controller=
c×(us-us-1), wherein c is adjustment factor；Wherein: us-1For in last inspiratory duration, actual oxygen flow f1 and target oxygen stream
When amount f1 stablizes in deviation range, the feedback voltage level of record；
Through above-mentioned regulation, work as usWith us-1When deviation is in allowed band, record output now is ds；Now core
Output d (the k)=d controllings+δd×t；
Wherein, variable t is time parameter, described t=1,2,3......
Through above-mentioned regulation, until the deviation that the actual oxygen flow f1 and target oxygen flow f1 of feedback produce reaches permission
In the range of, and record feedback voltage u nows.
Above-mentioned sky oxygen mixing controls respirator to be respectively provided with air filtration pieces, height in air source interface, source of oxygen seam
Pressure oxygen filter, the air source of air inlet gas circuit first passes through air filtration pieces and filters impurity, enters the oxygen source of oxygen gas circuit
First pass through high pressure oxygen filter and filter impurity；
Hyperbaric oxygen pressure transducer was set before oxygen flow rate adjusting valve, when the oxygen source pressure mistake entering oxygen gas circuit
When high/too low, the hyperbaric oxygen pressure transducer being arranged in oxygen gas circuit provides oxygen source hypertonia/too low alarm signal, and
Oxygen source pressure is adjusted to 0.276mpa-0.7mpa；
In blower fan gas outlet setting blower fan gas outlet pressure transducer, when pressure in the blower fan output pressure in air gas circuit
When power is abnormal, blower fan gas outlet pressure transducer provides fan trouble alarm signal；
Before the actual oxygen flow f1 of oxygen flow sensor acquisition output, oxygen source first passes through oxygen denoising device noise reduction simultaneously
By oxygen current stabilization part current stabilization；Air flow sensor records air mass flow for, before f2, it is steady that air source first passes through air current stabilization part
Stream.
The beneficial effects of the utility model:
1st, using based on oxygen flow and voltage in the oxygen gas circuit of respirator that sky oxygen mixing of the present utility model controls
Double closed-loop control system realize control to oxygen valve, Voltage Feedback control ring can accelerate governing speed, in flow and
Under the control of voltage double closed-loop control system, the precision that respirator mixing controls can be greatly improved.
2nd, in this utility model, before blower fan is placed in oxygen air mixing chamber, can avoid causing letting out of unnecessary oxygen
Dew, it can in addition contain avoid the mixed gas middle and high concentration oxygen after mixing blower interior heating can be caused to draw by blower fan
Play potential safety hazard.
3rd, in this utility model: air filtration pieces, high pressure oxygen mistake are respectively arranged with air gas circuit and oxygen gas circuit
Filter, carries out contaminant filter respectively to air and oxygen, improves the cleanliness factor of air and oxygen.
4th, in this utility model: air current stabilization part, oxygen current stabilization part are respectively arranged with air gas circuit and oxygen gas circuit,
Air closure member, oxygen closure member rear and front end bad student can be enable respectively stable with stable air air-flow, oxygen gas circuit respectively
Pressure reduction, make the numerical value of air flow sensor, oxygen flow sensor acquisition more accurate.
5th, this utility model respirator is compared with documents 1 and documents 2, public in documents 1 and documents 2
The empty oxygen mixing device opened is by realizing the regulation to empty oxygen flow and control to the change of structure in empty oxygen mixing device.
Oxygen valve control system of the present utility model is the double closed-loop control system based on flow and voltage, can accelerate to be adjusted to mesh
The speed of mark flow, reduces regulating time, and precision is more accurate.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is this utility model embodiment sky oxygen mixing respirator overall structure diagram；
The structure based on flow, the double closed-loop control system of Voltage Feedback that Fig. 2 controls for this utility model oxygen valve
Schematic diagram；
Description of reference numerals:
101st, high pressure oxygen filter；102nd, high pressure oxygen gas pressure sensor；103rd, oxygen flow adjusts example valve；104th, oxygen
Gas denoising device；105th, oxygen current stabilization part；106th, oxygen flow sensor；107th, oxygen closure member；108th, core controller；
109th, drive circuit；
201st, air filtration pieces；202nd, blower fan；203rd, blower fan gas outlet pressure transducer；204th, sort of air pressure adjusting valve；
205th, air current stabilization part；206th, air flow sensor；207th, air closure member；
3rd, air oxygen mixing chamber；
4th, gas outlet pressure transducer；
5th, patient interface；6th, oxygen source interface；7th, air source interface.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment further illustrates to utility model, but be not limited to model of the present utility model
Enclose.
As shown in Figure 1, 2, this utility model provides the respirator that a kind of sky oxygen mixing controls, and specifically includes:
Oxygen gas circuit, air gas circuit, oxygen air mixing chamber 3, the inlet end of described oxygen gas circuit passes through oxygen source interface 6
External hyperbaric oxygen source of the gas, the inlet end of described air gas circuit passes through the external air source of air source interface 7；Oxygen gas circuit, air gas
The outlet side on road is connected to air oxygen mixing chamber 3；Air oxygen mixing chamber 3 connects gas outlet pressure transducer 4, and connects
To patient interface 5；
It is sequentially provided with described oxygen gas circuit: high pressure oxygen filter 101, hyperbaric oxygen pressure transducer 102, oxygen flow
Regulating valve 103, oxygen denoising device 104, oxygen current stabilization part 105, oxygen flow sensor 106 and oxygen closure member 107；
Be sequentially provided with described air gas circuit: air filtration pieces 201, blower fan 202, blower fan gas outlet pressure transducer 203,
Sort of air pressure adjusting valve 204, air current stabilization part 205, air flow sensor 206 and air closure member 207；
Core controller 108 and drive circuit 109, core controller 108, drive circuit are additionally provided with described oxygen gas circuit
109th, oxygen flow rate adjusting valve 103, oxygen flow sensor 106 are sequentially connected, and form loop；Oxygen flow sensor 106, drive
Galvanic electricity road 109 respectively can by oxygen flow, Voltage Feedback to core controller 108, formed one based on flow, Voltage Feedback double
Closed-loop control system, realizes the control to oxygen flow rate adjusting valve.
The empty oxygen mixing of the present embodiment controls the operation principle of respirator as follows:
On the one hand, the oxygen gas circuit of respirator passes through the external hyperbaric oxygen source of the gas of oxygen source interface 6, hyperbaric oxygen bleed pressure model
Enclose for 0.276mpa～0.7mpa, oxygen passed through oxygen source interface 6 before entering hyperbaric oxygen pressure transducer 102, first passed through
High pressure oxygen filter 101 carries out impurity and filters；Hyperbaric oxygen pressure transducer 102 in oxygen gas circuit is used for detecting oxygen source pressure
Power, when oxygen source hypertonia, respirator sends oxygen supply hypertonia and reports to the police, and when oxygen source hypotony, respirator is sent out
Go out oxygen supply hypotony to report to the police；Enter oxygen flow rate adjusting valve 103 afterwards, oxygen flow rate adjusting valve 103 is used for adjusting oxygen
The output of throughput, the target oxygen flow f1 by the regulation of this valve, needed for the expected mixed gas of output；
Afterwards, oxygen passes through oxygen denoising device 104, reduces the pressure of high pressure oxygen output, it is to avoid at patient interface
The pressure of output causes very big influence of fluctuations；Afterwards, oxygen passes through oxygen current stabilization part 105；
Afterwards, oxygen passes through oxygen closure member 107 again and produces pressure reduction in its rear and front end, and meanwhile, oxygen flow senses
Device 106 passes through the actual oxygen flow of differential pressure measurement in oxygen closure member 106 front and back end for the measurement, due to before oxygen closure member 106
Be provided with oxygen current stabilization part 105, oxygen flow can be made stable so that oxygen closure member 106 can the stable pressure reduction of bad student, make
The value of oxygen flow sensor 106 collection is more accurate.
In order to obtain the output of target oxygen flow f1, the core controller 108 in oxygen gas circuit exports a controlled quentity controlled variable
To drive circuit 109, drive circuit 109 controls oxygen flow rate adjusting valve 103 to adjust the output of oxygen flow after amplifying signal,
The flow value f1 of oxygen flow sensor 106 collection output simultaneously feeds back to core controller 108；Meanwhile, in order to accelerate oxygen stream
The governing speed of adjustable valve 103, can rapidly reach target oxygen flow f1, and the valve of drive circuit 109 will control electricity
Circulation be changed to voltage signal u1 and feed back to core controller 108, core controller 108 to feedback actual oxygen flow f1 and
Feedback voltage u1 process, then output control amount is to drive circuit 109, realize accurate to oxygen flow, rapidly adjust
And control.
On the other hand, the air gas circuit of respirator passes through the external air source of air source interface 7, and air is entering blower fan 202
First pass through air filtration pieces 201 before, filter the impurity of in the air；Air after filtering pressurizes through blower fan 202, then leads to
Cross the blower fan gas outlet pressure transducer 203 being arranged on blower fan 202 gas outlet, for detection blower fan output pressure whether just
Often, when pressure anomaly, respirator provides fan trouble to report to the police；Blower fan in the present embodiment be arranged on sky oxygen mixing chamber it
Before, can avoid causing the leakage of unnecessary oxygen, it can in addition contain avoid the mixed gas middle and high concentration oxygen after mixing to lead to
Crossing blower fan can cause blower interior heating to cause potential safety hazard.
Afterwards, air passes through the sort of air pressure adjusting valve 204 in air gas circuit again, and sort of air pressure adjusting valve 204 can root
According to the output pressure at the value of feedback real-time regulation patient outlet of gas outlet pressure transducer 4；Afterwards, air is in air closure member
207 rear and front ends produce pressure reduction, and meanwhile, air flow sensor 206 passes through the pressure by air closure member 207 front and back end for the measurement
Difference measurements actual air flow.In order that air closure member 207 rear and front end can produce stable pressure reduction, air mass flow is made to pass
The numerical value of sensor 206 collection is more accurate, can arrange air current stabilization part 205, made air draught before air closure member 207
Air inlet closure member 207 after stable.
The air of air gas circuit is pooled to air oxygen mixing chamber 3 with the oxygen of oxygen gas circuit, then passes through a gas outlet
Pressure transducer 4, is finally coupled to patient interface 5.The gas outlet pressure transducer 4 of respirator is used for measuring respirator gas outlet
Pressure p, the sort of air pressure adjusting valve 204 in air gas circuit adjusts the gas outlet pressure transducer 4 according to respirator gas outlet
Feedback pressure real-time regulation output pressure reaches p value.
The method that the mixing of the present embodiment hollow oxygen controls is as follows:
(1) set this respirator gas outlet output empty oxygen gas mixture expecting pressure as p it is contemplated that export oxygen concentration
For n, wherein n > 21%:
Sort of air pressure adjusting valve in air gas circuit adjusts the feedback of the gas outlet pressure transducer according to respirator gas outlet
Pressure real-time regulation output pressure reaches expecting pressure p value；
(2) set the air flow sensor in air gas circuit and measure air mass flow now as f2, air mass flow f2 is logical
Cross the pressure reduction gained that air flow sensor gathers air closure member front and back end, according to formulaObtain from
Target oxygen flow needed for air oxygen mixing chamber mixed gas out
In order to obtain the output of target oxygen flow f1, oxygen gas circuit is additionally provided with and is connected with oxygen flow rate adjusting valve
Core controller and drive circuit, core controller exports a controlled quentity controlled variable to drive circuit, after signal is amplified by drive circuit
Oxygen flow rate adjusting valve is controlled to adjust the output of oxygen flow, the actual oxygen flow f1 of oxygen flow sensor acquisition output is anti-
It is fed to core controller, form flow feedback control；Described actual oxygen flow f1 passes through oxygen flow sensor acquisition air
The pressure reduction gained of closure member front and back end；
Meanwhile, in order to accelerate the governing speed of valve, rapidly reach target oxygen flow f1, the valve of drive circuit will
Control electric current is converted to voltage signal and feeds back to core controller, forms Voltage Feedback and controls, and feedback voltage is u1；
Core controller is given to the actual oxygen flow f1 feeding back and feedback voltage u1 process, then output control amount
Drive circuit, forms flow, Voltage Feedback double-closed-loop control；The actual oxygen flow to feedback for the core controller in the present embodiment
The method that f1 and feedback voltage u1 is processed is:
A, outer shroud are oxygen flow negative feedback: outer shroud controlling increment δ u (k)=a1×u(k)+a2×u(k-1)+a3×u
(k-2)；
Wherein, u (k)=f1-f1, it is target oxygen flow f1 and the deviation of feedback oxygen flow f1；
a1=kp1+ki1+kd1；
a2=-kp1-2×kd1；
a3=kd1；
kp1For proportionality coefficient, ki1For integral coefficient, kd1For differential coefficient.
Then outer shroud output u (k)=u (k-1)+δ u (k)；
B, internal ring are negative voltage feedback: ibid, internal ring controlling increment δ d (k)=b1×d(k)+b2×d(k-1)+b3×d
(k-2)；
Wherein, d (k)=u (k)-u1, it is the deviation of outer shroud output u (k) and feedback voltage u1；
b1=kp2+ki2+kd2；
b2=-kp2-2×kd2；
b3=kd2；
kp2For proportionality coefficient, ki2For integral coefficient, kd2For differential coefficient.
Then internal ring output is output d (k)=d (k-1)+δ d (k) to drive circuit for the core controller.
(3) oxygen flow adjusts the oxygen flow that example valve records, the oxygen of real-time regulation output according to oxygen flow sensor
Throughput reaches desired value f1.
(4) when the oxygen flow of oxygen gas circuit output increases, the output pressure at respirator gas outlet also can increase therewith
Greatly, thus the output pressure value of respirator can deviate expecting pressure value p, now, repeat step (1) adjusts output pressure to pre-
Phase pressure value p, then repeat step (2) retrieve new target oxygen flow f1 ', will export followed by repeat step (3)
Flow-rate adjustment is to new target oxygen flow f1 '；
By dynamic circulation step (1)-(3), until the output pressure of respirator and oxygen concentration are it is anticipated that value stabilization
Output.
Air mistake is first passed around after the air source of the respirator of the present embodiment/source of oxygen air inlet gas circuit/oxygen gas circuit
Filter disc/high pressure oxygen filter filters impurity；And hyperbaric oxygen pressure transducer is set before oxygen flow rate adjusting valve, work as entrance
During the oxygen source hypertonia of oxygen gas circuit/too low, the hyperbaric oxygen pressure transducer being arranged in oxygen gas circuit provides oxygen source pressure
Too high/too low alarm signal, and oxygen source pressure is adjusted to 0.276mpa-0.7mpa；The blower fan gas outlet setting of air gas circuit
There is blower fan gas outlet pressure transducer, when pressure anomaly in the blower fan output pressure in air gas circuit, blower fan gas outlet is pressed
Force transducer provides fan trouble alarm signal；Before the actual oxygen flow f1 of oxygen flow sensor acquisition output, oxygen source is first
By oxygen denoising device noise reduction and by oxygen current stabilization part current stabilization；Air flow sensor records before air mass flow is f2, empty
Source of the gas first passes through air current stabilization part current stabilization, makes the numerical value of air flow sensor, oxygen flow sensor acquisition more accurate.
Empty oxygen mixing in the present embodiment controls respirator, due to using the double-closed-loop control based on oxygen flow and voltage
System realizes the control to oxygen valve, and Voltage Feedback control ring can accelerate governing speed, in flow and voltage two close cycles control
Under the control of system processed, the precision that respirator mixing controls can be greatly improved.
Embodiment 2
The present embodiment is with the difference of embodiment 1:
The method that in the present embodiment, core controller is processed to the actual oxygen flow f1 and feedback voltage u1 of feedback
For:
When patient starts air-breathing, the deviation of the actual oxygen flow f1 and target oxygen flow f1 generation of feedback is more than fair
When being permitted scope, start to adjust output oxygen flow；
First, the Voltage Feedback u of real-time detections, work as usWith us-1When deviation is larger, output d (k) of core controller=
c×(us-us-1), wherein c is adjustment factor；Wherein: us-1For in last inspiratory duration, actual oxygen flow f1 and target oxygen stream
When amount f1 stablizes in deviation range, the feedback voltage level of record；
Through above-mentioned regulation, work as usWith us-1When deviation is in allowed band, record output now is ds；Now core
Output d (the k)=d controllings+δd×t；
Wherein, variable t is time parameter, described t=1,2,3......
Through above-mentioned regulation, until the deviation that the actual oxygen flow f1 and target oxygen flow f1 of feedback produce reaches permission
In the range of, and record feedback voltage u nows.
Of the present utility model ultimate principle, principal character and of the present utility model advantage have been shown and described above.One's own profession
The technical staff of industry it should be appreciated that this utility model is not restricted to the described embodiments, described in above-described embodiment and description
Principle of the present utility model is simply described, on the premise of without departing from this utility model spirit and scope, this utility model also can
There are various changes and modifications, these changes and improvements both fall within the range of claimed this utility model.This utility model will
Protection domain is asked to be defined by appending claims and its equivalent.
Claims (8)
1. the respirator that a kind of sky oxygen mixing controls is it is characterised in that include:
Oxygen gas circuit, air gas circuit, oxygen air mixing chamber, the inlet end of described oxygen gas circuit passes through the external height of oxygen source interface
Pressure source of oxygen, the inlet end of described air gas circuit passes through the external air source of air source interface；Oxygen gas circuit, the giving vent to anger of air gas circuit
End is connected to air oxygen mixing chamber；Air oxygen mixing chamber connects gas outlet pressure transducer, and connects to patient interface；
It is sequentially provided with described oxygen gas circuit: oxygen flow rate adjusting valve, oxygen flow sensor and oxygen closure member；
It is sequentially provided with described air gas circuit: blower fan, sort of air pressure adjusting valve, air flow sensor and air closure member；
Core controller and drive circuit are additionally provided with described oxygen gas circuit, core controller, drive circuit, oxygen flow are adjusted
Valve, oxygen flow sensor are sequentially connected, and form loop；Oxygen flow sensor, drive circuit respectively can be by oxygen flow, voltages
Feed back to core controller, form a double closed-loop control system based on flow, Voltage Feedback, realize oxygen flow is adjusted
The control of valve.
2. according to claim 1 a kind of sky oxygen mixing control respirator it is characterised in that
In described oxygen gas circuit, before oxygen flow rate adjusting valve, it is provided with high pressure oxygen gas pressure sensor.
3. according to claim 1 a kind of sky oxygen mixing control respirator it is characterised in that
In described air gas circuit, it is provided with blower fan gas outlet pressure transducer at fan outlet.
4. according to claim 1 a kind of sky oxygen mixing control respirator it is characterised in that
In described oxygen gas circuit, it is provided with high pressure oxygen filter in source of oxygen seam.
5. according to claim 1 a kind of sky oxygen mixing control respirator it is characterised in that
In described air gas circuit, it is provided with air filtration pieces in air source seam.
6. according to claim 1 a kind of sky oxygen mixing control respirator it is characterised in that
In described oxygen gas circuit, it is provided with oxygen current stabilization part after described oxygen flow rate adjusting valve.
7. according to claim 1 a kind of sky oxygen mixing control respirator it is characterised in that
In described air gas circuit, it is provided with air current stabilization part after described sort of air pressure adjusting valve.
8. according to claim 6 a kind of sky oxygen mixing control respirator it is characterised in that
In described oxygen gas circuit, between oxygen flux control valve and oxygen current stabilization part, it is additionally provided with oxygen denoising device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553002.8U CN205885925U (en) | 2016-06-08 | 2016-06-08 | Breathing machine of air -oxygen mixing control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553002.8U CN205885925U (en) | 2016-06-08 | 2016-06-08 | Breathing machine of air -oxygen mixing control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205885925U true CN205885925U (en) | 2017-01-18 |
Family
ID=57766955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620553002.8U Active CN205885925U (en) | 2016-06-08 | 2016-06-08 | Breathing machine of air -oxygen mixing control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205885925U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963837A (en) * | 2016-06-08 | 2016-09-28 | 湖南明康中锦医疗科技发展有限公司 | Air-oxygen mixed control breathing machine and control method |
| WO2021134322A1 (en) * | 2019-12-30 | 2021-07-08 | 深圳迈瑞生物医疗电子股份有限公司 | Auxiliary ventilation system and anesthesia system |
| WO2021147225A1 (en) * | 2020-01-20 | 2021-07-29 | 深圳市科曼医疗设备有限公司 | Mixing cavity pressure control method, breathing machine device, and computer readable storage medium |
-
2016
- 2016-06-08 CN CN201620553002.8U patent/CN205885925U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963837A (en) * | 2016-06-08 | 2016-09-28 | 湖南明康中锦医疗科技发展有限公司 | Air-oxygen mixed control breathing machine and control method |
| WO2021134322A1 (en) * | 2019-12-30 | 2021-07-08 | 深圳迈瑞生物医疗电子股份有限公司 | Auxiliary ventilation system and anesthesia system |
| WO2021147225A1 (en) * | 2020-01-20 | 2021-07-29 | 深圳市科曼医疗设备有限公司 | Mixing cavity pressure control method, breathing machine device, and computer readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105963837B (en) | A kind of ventilator and control method of the mixing control of sky oxygen | |
| JP4158958B2 (en) | Method and apparatus for controlling supply pressure in auxiliary ventilation | |
| CN106964045B (en) | Gas anesthesia system | |
| CN205885925U (en) | Breathing machine of air -oxygen mixing control | |
| CN103893865B (en) | A kind of method of lung ventilator turbine volume controlled ventilation | |
| CN205073460U (en) | Novel open -air rescue anesthesia machine | |
| SE8004530L (en) | SET AND DEVICE FOR CONTROL OF A LUNG FAN | |
| DE102016122187A1 (en) | High-frequency generator for ventilation and procedures | |
| CN105944201A (en) | A medical intelligent ventilator | |
| CN205759087U (en) | A kind of intelligent IC U assisted respirator | |
| CN103191505A (en) | Portable air cleaner | |
| CN204017086U (en) | No supply and monitoring device and respiratory system | |
| CN110464947A (en) | A kind of system and ventilation control method of high frequency respirator | |
| CN203107938U (en) | Portable air purifier | |
| CN108295348A (en) | A kind of emergency care lung ventilator simulated lung device | |
| WO2017198238A1 (en) | Automatic wearable powered air purifying system and method | |
| CN205885928U (en) | A air -oxygen mixing air flue and breathing machine for breathing machine | |
| CN204649453U (en) | A kind of humidification machine humidifying aptitude tests device | |
| CN207799482U (en) | SCM Based apparatus of oxygen supply | |
| CN103893881B (en) | The flow control methods of a kind of flow valve and device | |
| CN206325088U (en) | A kind of closed loop aerating system and lung ventilator | |
| CN203379444U (en) | Breathing machine highly synchronous with breathing | |
| CN206063514U (en) | A kind of medicinal intelligent lung ventilator | |
| CN204699187U (en) | Digitized composite-crossing anesthesia in operating room toxic emission monitoring system | |
| CN106178210A (en) | Gassing first-aid respirator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 410205 Room 101, 1st floor, north of superstar entrepreneurship base, No. 8 Lujing Road, high tech Development Zone, Changsha, Hunan Patentee after: Hunan Mingkang Zhongjin Medical Technology Co.,Ltd. Address before: 410000 North first floor, superstar entrepreneurship base, No. 8 Lujing Road, Changsha City, Hunan Province Patentee before: HUNAN MICOME ZHONGJIN MEDICAL SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| CP03 | Change of name, title or address |