CN109011090B - Air-oxygen mixed gas circuit design and breathing machine with same - Google Patents
Air-oxygen mixed gas circuit design and breathing machine with same Download PDFInfo
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- CN109011090B CN109011090B CN201810709341.4A CN201810709341A CN109011090B CN 109011090 B CN109011090 B CN 109011090B CN 201810709341 A CN201810709341 A CN 201810709341A CN 109011090 B CN109011090 B CN 109011090B
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- 239000007789 gas Substances 0.000 title claims abstract description 94
- 239000001301 oxygen Substances 0.000 title claims abstract description 91
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 91
- 230000029058 respiratory gaseous exchange Effects 0.000 title claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 61
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 5
- 238000000889 atomisation Methods 0.000 claims description 12
- 244000144985 peep Species 0.000 claims description 8
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory devices
- A61M16/201—Controlled valves
- A61M16/202—Controlled valves electrically actuated
- A61M16/203—Proportional
- A61M16/204—Proportional used for inhalation control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory devices
- A61M16/201—Controlled valves
- A61M16/202—Controlled valves electrically actuated
- A61M16/203—Proportional
- A61M16/205—Proportional used for exhalation control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
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- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Magnetic Treatment Devices (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses an air-oxygen mixed gas circuit design, which comprises an air circuit, an oxygen circuit, a mixed circuit, an air suction port, a patient and a exhalation port, the air path and the oxygen path are respectively provided with an air inlet, air and oxygen respectively enter the air path and the oxygen path from the air inlet of the air path and the air inlet of the oxygen path, the air in the air path and the oxygen in the oxygen path form mixed gas in the mixing path, the mixed gas enters the patient body from the air suction port, the patient discharges the gas in the body from the exhalation port, the air passage is provided with a first proportional solenoid valve, the oxygen gas circuit is provided with a second proportional solenoid valve, the mixing circuit is provided with a third proportional solenoid valve, the air-oxygen mixing gas circuit is designed and the respirator with the gas circuit is used for accurately controlling the tidal volume and the oxygen concentration of the respirator, and no matter the tidal volume or the oxygen concentration is independently set, the change of other parameters cannot be caused.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to medical equipment, in particular to an air-oxygen mixed gas circuit design and a breathing machine with the same.
[ background of the invention ]
No matter the high-end and low-end breathing machine gas circuits on the market at present can be divided into 3 types, the first type adopts a valve island form to mix air and oxygen, the mixing method utilizes the large number of electromagnetic valves and needs a large air bag, because the opening aperture of the electromagnetic valves can not change and 21% -100% of oxygen concentration needs to be mixed, the air and oxygen mixing is realized by selecting a plurality of electromagnetic valves with different apertures, the error of the mixed oxygen concentration is large, the accuracy is low, and because the large air bag is needed, the oxygen concentration can reach the oxygen concentration set by an operator in a long time. The second type adopts two proportional solenoid valves to carry out air-oxygen mixing, one way of proportional solenoid valve controls oxygen flow output, the other way of proportional solenoid valve controls air flow output, the two are mixed, thus the two proportional solenoid valves control the oxygen concentration after mixing and the mixed gas flow after mixing, and finally the output mixed flow and the output oxygen concentration are changed along with the change. Thirdly, the oxygen concentration is controlled by adopting the Venturi principle, so that the oxygen concentration can be changed immediately when the breathing machine sets different tidal volumes.
Therefore, the problem to be solved in the field is to provide an improved air-oxygen mixed gas circuit.
[ summary of the invention ]
Aiming at the problems, the invention provides an air-oxygen mixed gas path design and a breathing machine with the air path, which can accurately control the tidal volume and the oxygen concentration of the breathing machine, and can not cause the change of other parameters no matter the tidal volume or the oxygen concentration is independently set.
In order to solve the above problems, the present invention provides an air-oxygen mixed gas path design, which includes an air path, an oxygen path, a mixed path, an air inlet, a patient, and a exhalation port, where the air path and the oxygen path respectively have an air inlet, air and oxygen respectively enter the air path and the oxygen path from the air inlet of the air path and the air inlet of the oxygen path, the air and the oxygen in the air path form a mixed gas in the mixed path, the mixed gas enters the patient from the air inlet, the patient discharges the body gas from the exhalation port, the air path has a first proportional solenoid valve, the oxygen path has a second proportional solenoid valve, and the mixed path has a third proportional solenoid valve.
Furthermore, the mixing path comprises an air bag, the air path and the oxygen path are mixed in the air bag to form mixed gas, and the mixed gas passes through the third proportional solenoid valve and then enters the patient through the air suction port.
Further, the air bag is provided with a pressure sensor.
Furthermore, the air-oxygen mixed gas circuit is also provided with a breathing out circuit, the breathing out circuit is provided with a breathing out flow sensor and atmosphere, and gas in the patient body is exhausted to the atmosphere through the flow sensor.
Further, a flow sensor is also arranged in the mixing circuit.
Furthermore, the air-oxygen mixed gas circuit is also provided with a protection circuit, the protection circuit comprises a free inspiration one-way valve and atmosphere, and the patient inhales gas from the atmosphere through the free inspiration one-way valve.
Furthermore, the air-oxygen mixed gas circuit design also comprises an electromagnetic valve and a PEEP, the oxygen and the air are mixed and then pass through the electromagnetic valve and are connected to the exhalation port through the PEEP, the exhalation port is provided with a diaphragm, the diaphragm conducts and closes a passage between the patient and the exhalation port, the electromagnetic valve closes the passage between the patient and the exhalation port through a control diaphragm when the patient inhales, and the PEEP semi-opens the passage between the patient and the exhalation port through the control diaphragm when the patient exhales, so that the air pressure in the patient is maintained at a constant value.
The air-oxygen mixed gas circuit is also provided with a micro-pressure valve connected between the electromagnetic valve and the gas inlet, and air and oxygen enter from the gas inlet respectively and pass through the electromagnetic valve after passing through the micro-pressure valve.
The air-oxygen mixing gas circuit is provided with an atomization path connected to the air suction port, the atomization path is provided with an electromagnetic valve and atomization, and the atomization path is connected between the air inlet and the air suction port.
A respirator comprising the air-oxygen mixed gas circuit design of any one of the above.
Furthermore, the air-oxygen mixed gas path design and the breathing machine with the air path adopt 3 proportional solenoid valves to control the concentration and the flow of the mixed gas, the proportional solenoid valves of the oxygen path and the air path independently control the concentration of the mixed gas, and the mixed gas controls the flow of the output gas through the proportional solenoid valve 17, so that the 3 proportional valves divide the concentration of the mixed gas and the flow of the mixed gas, and finally the concentration and the flow of the mixed gas are accurately controlled.
[ description of the drawings ]
FIG. 1 is a schematic diagram of the air-oxygen mixed gas circuit design of the present invention.
[ detailed description ] embodiments
Referring to fig. 1, the air-oxygen mixed gas path of the invention is designed to have an air path, an oxygen path and a mixing path, wherein the air path includes an air inlet, a pressure sensor 1, a pressure reducing valve 3, a proportional solenoid valve 6 and a solenoid valve 11, the oxygen path includes an air inlet, a pressure sensor 2, a pressure reducing valve 4, a proportional solenoid valve 7 and a solenoid valve 14, the pressure sensor 1 collects and feeds back the air pressure of the air path, and the pressure sensor 2 collects and feeds back the air pressure of the oxygen path. The mixing circuit comprises an air bag 15, a proportional solenoid valve 17 and a flow sensor 18, wherein the air bag 15 is provided with a pressure sensor 16 for detecting and feeding back the pressure of the mixed gas in the air bag. After the mixture of gases enters the patient 22 through the inlet opening 20, the patient expels the gases from the patient through the exhalation port 24. The exhalation path includes an exhalation flow sensor 25 and the atmosphere 26. Gas in the patient body in the exhalation port 24 is discharged to the atmosphere 26 through the exhalation flow sensor 25 at last, and the exhalation flow sensor is used for detecting the condition that the return circuit of breathing machine has or not damaged the gas leakage, if do not damage, the numerical value that flow sensor 18 feedback of hybrid equals with the numerical value that exhalation flow sensor 25 feedbacks, if the numerical value that flow sensor 18 feedback of hybrid is greater than the numerical value that exhalation flow sensor 25 feedbacks, then judge this return circuit damage gas leakage, remind the maintainer to overhaul. The air inlet 20 is connected with a protection path leading to the atmosphere 23, the protection path is provided with a free air suction one-way valve 21 which is connected between the air inlet 20 and the atmosphere 23, when the respirator is damaged and the mixed path can not discharge air to the air inlet, a patient inhales air from the atmosphere 23 through spontaneous respiration, and the phenomenon that the patient can not inhale air due to the damage of the respirator is avoided. The air inlet 20 is connected to an oxygen concentration sensor 19.
Air and oxygen pass through solenoid valve 5 and pass through little pressure valve 8 again, through two solenoid valves 9 respectively behind little pressure valve 8, 10, divide into two the tunnel behind one of them solenoid valve 9, be connected to exhale port 24 all the way, be connected to induction port 20 all the way, be connected with PEEP 12(positive end pressure valve of positive end of the exhalation of positive end of the exhalation of solenoid valve 9 and exhale port 24, the exhale port has the diaphragm, when solenoid valve 9 opens, gaseous process solenoid valve 9, the passageway between exhale port and the patient is closed to the diaphragm, make things convenient for patient to follow induction port 20 inspiratory gas. When a patient needs to exhale gas, the PEEP 12 controls the diaphragm to be half-opened, so that the air pressure in the loop is kept at a constant value, and the incomplete exhaust of the gas in the patient is ensured; the gas enters into the atomization 13 after passing through another electromagnetic valve 10, the electromagnetic valve 10 and the atomization 13 form an atomization path, and the gas enters into the air suction port 20 through the atomization path, so that the humidity of the gas inhaled by the patient is ensured. The micro-pressure valve 8 depressurizes the gas in the circuit to prevent the membrane in the circuit from being damaged by too much gas pressure.
Air enters the air path from an air inlet of the air path, the pressure sensor 1 measures an air pressure value, the air is decompressed to 0.3Mpa through the decompression valve 3, the flow of the air output is controlled through the proportional electromagnetic valve 6, the electromagnetic valve 11 is used for ensuring that the pressure in the air bag 15 does not exceed 0.2Mpa through the electromagnetic valve 11, when the pressure in the air bag 15 is more than or equal to 0.2Mpa, the electromagnetic valve 11 is switched off, and when the pressure in the air bag 15 is less than or equal to 0.2Mpa
At 0.2MPa, the solenoid valve 11 is opened.
Oxygen enters the oxygen path from an air inlet of the oxygen path, the pressure sensor 2 measures the air pressure value, the pressure of the oxygen is reduced to 0.3MPa through the pressure reducing valve 4, the oxygen passes through the proportional electromagnetic valve 7, the flow output by the oxygen is controlled by the proportional electromagnetic valve 7, and the oxygen passes through the electromagnetic valve 14. The electromagnetic valve 14 is used for ensuring that the pressure of the air bag 15 does not exceed 0.2MPa, when the pressure of the air bag 15 is greater than or equal to 0.2MPa, the electromagnetic valve 14 is closed, and when the pressure of the air bag 15 is less than 0.2MPa, the electromagnetic valve 14 is opened.
Air and oxygen are input into the air bag 15 from the electromagnetic valve 11 and the electromagnetic valve 14, a pressure sensor 16 is arranged in the air bag 15 for detecting, collecting and feeding back the pressure of mixed gas in the air bag 15, the pressure is stabilized at 0.2MPa, the mixed gas in the air bag 15 is output through the proportional electromagnetic valve 17, and the mixed gas is output through the flow sensor 18 and finally enters the air suction port 20 of a patient.
Proportional solenoid valve 6 and proportional solenoid valve 7 are the size that is used for controlling output gas mixture oxygen concentration, and when setting up the oxygen concentration grow, proportional solenoid valve 6's valve port is opened for a short time, and proportional solenoid valve 7's valve port is opened for a long time, and when setting up the oxygen concentration grow, proportional solenoid valve 6's valve port is opened for a long time, and proportional solenoid valve 7's valve port is opened for a short time to accurate control oxygen concentration, and do not influence other parameters. The proportional solenoid valve 17 is used for controlling the flow of the output mixed gas, and collects feedback flow information through the flow sensor 18 to form a closed loop, so as to accurately control the output flow.
The air-oxygen mixed gas path is designed for a breathing machine, 3 proportional electromagnetic valves are adopted to control the concentration and the flow of mixed gas, the proportional electromagnetic valves of the oxygen gas path and the air gas path independently control the concentration of the mixed gas, the mixed gas controls the flow of output gas through the proportional electromagnetic valve 17, and thus the 3 proportional valves divide the concentration of the mixed gas and the flow of the mixed gas, and finally the concentration and the flow of the mixed gas are accurately controlled. The air-oxygen mixed gas circuit design can accurately control the tidal volume and the oxygen concentration of the breathing machine, and no matter the tidal volume or the oxygen concentration is independently set, other parameters cannot be changed.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. An air-oxygen mixed gas circuit, which comprises an air circuit, an oxygen circuit, a mixed circuit, a suction port (20) and a exhalation port (24), wherein the air circuit and the oxygen circuit are respectively provided with a gas inlet, air and oxygen enter the air circuit and the oxygen circuit from the gas inlet of the air circuit and the gas inlet of the oxygen circuit respectively, the air and the oxygen in the air circuit form mixed gas in the mixed circuit, the mixed gas enters a patient (22) from the suction port (20), the patient discharges the gas in the body from the exhalation port (24), the air circuit is provided with a first proportional solenoid valve (6), the oxygen circuit is provided with a second proportional solenoid valve (7), the mixed circuit is provided with a third proportional solenoid valve (17), the air circuit is also provided with a first solenoid valve which is connected with the first proportional solenoid valve in series and is used for controlling the turn-off and turn-on of the air circuit, the oxygen gas path is also provided with a second electromagnetic valve which is connected with a second proportional electromagnetic valve in series and is used for controlling the turn-off and the turn-on of the oxygen gas path, the air-oxygen mixed gas path is also provided with a breathing path, the breathing path is provided with a breathing flow sensor (25), the gas in the patient is discharged to the atmosphere through the flow sensor (25), the mixing path is also provided with a flow sensor (18), the air-oxygen mixed gas path is also provided with another mixing path which comprises a third electromagnetic valve and a PEEP (12), the oxygen gas and the air are mixed and then pass through the third electromagnetic valve and are connected to a breathing port (24) through the PEEP (12), the breathing port (24) is provided with a diaphragm, the diaphragm is communicated and closed with a passage between the patient and the breathing port, and when the patient inhales, the third electromagnetic valve closes the passage between the patient and the breathing port through a control diaphragm, the PEEP maintains the air pressure in the patient at a constant value by controlling the diaphragm to half-open the path between the patient and the exhalation port when the patient exhales.
2. The air-oxygen mixing gas circuit according to claim 1, wherein the mixing circuit comprises a gas bag (15), the gas of the air circuit and the gas of the oxygen circuit are mixed in the gas bag (15) to form a mixed gas, and the mixed gas passes through a third proportional solenoid valve (17) and then enters the patient (22) through the suction port (20).
3. The air-oxygen mixing gas circuit according to claim 2, wherein the gas bag is provided with a pressure sensor (16).
4. The air-oxygen mixing circuit according to claim 1, further comprising a protection circuit, wherein the protection circuit comprises a free-inspiration one-way valve (21), and the patient (22) inhales gas from the atmosphere through the free-inspiration one-way valve (21).
5. The air-oxygen mixing gas circuit according to claim 1, further comprising a micro-pressure valve (8) connected between the third solenoid valve and the gas inlet, wherein air and oxygen respectively enter from the gas inlet and pass through the third solenoid valve after passing through the micro-pressure valve (8).
6. The air-oxygen mixing gas circuit according to claim 1, wherein the air-oxygen mixing gas circuit has an atomization circuit connected to the air suction port (20), the atomization circuit having a fourth solenoid valve, an atomization device, the atomization circuit being connected between the air inlet and the air suction port (20).
7. A respirator, characterized in that the respirator comprises the air-oxygen mixing gas circuit of any one of the preceding claims.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810709341.4A CN109011090B (en) | 2018-07-02 | 2018-07-02 | Air-oxygen mixed gas circuit design and breathing machine with same |
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| CN201810709341.4A CN109011090B (en) | 2018-07-02 | 2018-07-02 | Air-oxygen mixed gas circuit design and breathing machine with same |
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| CN109011090B true CN109011090B (en) | 2021-04-20 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110074894B (en) * | 2019-05-28 | 2022-02-18 | 深圳市瑞沃德生命科技有限公司 | Ventilation system of anesthesia respirator and anesthesia respirator |
| CN110464951B (en) * | 2019-08-29 | 2022-04-08 | 宁波戴维医疗器械股份有限公司 | High-frequency respirator system and ventilation control method |
| CN110464949B (en) * | 2019-08-29 | 2022-07-12 | 宁波戴维医疗器械股份有限公司 | High-frequency respirator system |
| CN110464950B (en) * | 2019-08-29 | 2022-01-25 | 宁波戴维医疗器械股份有限公司 | High-frequency respirator system and ventilation control method |
| CN111110969B (en) * | 2020-01-14 | 2024-04-12 | 深圳市安保科技有限公司 | Air path control device of breathing machine |
| WO2021232276A1 (en) * | 2020-05-20 | 2021-11-25 | 深圳迈瑞生物医疗电子股份有限公司 | Ventilation adjustment method and high-frequency ventilation system |
| CN111632250A (en) * | 2020-06-08 | 2020-09-08 | 山东科技大学 | Humidification therapy device for mixed monitoring of air and oxygen and its monitoring method |
| CN112138254A (en) * | 2020-10-22 | 2020-12-29 | 广西宜和医疗科技有限公司 | Intelligent blood oxygen monitoring oxygen therapy instrument and oxygen therapy method thereof |
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