CN111110969A - Breathing machine gas circuit controlling means - Google Patents
Breathing machine gas circuit controlling means Download PDFInfo
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- CN111110969A CN111110969A CN202010038742.9A CN202010038742A CN111110969A CN 111110969 A CN111110969 A CN 111110969A CN 202010038742 A CN202010038742 A CN 202010038742A CN 111110969 A CN111110969 A CN 111110969A
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 112
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 3
- 239000001301 oxygen Substances 0.000 claims description 36
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 36
- 229910052760 oxygen Inorganic materials 0.000 claims description 36
- 238000001514 detection method Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 210000004072 Lung Anatomy 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 230000000241 respiratory Effects 0.000 description 1
- 201000004193 respiratory failure Diseases 0.000 description 1
- 230000002269 spontaneous Effects 0.000 description 1
Classifications
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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. mouth-to-mouth respiration; Tracheal tubes
-
- 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3334—Measuring or controlling the flow rate
Abstract
The invention discloses a breathing machine gas path control device which comprises a controller, a first electromagnetic valve, a first flow sensor, a mixing container, a first proportional valve and a second flow sensor, wherein the first electromagnetic valve, the first flow sensor, the mixing container, the first proportional valve and the second flow sensor are sequentially connected through pipelines, an outlet of the second flow sensor is connected with a gas transmission pipe, a gas inlet end of the first flow sensor is also connected with a second electromagnetic valve, gas inlet ends of the first electromagnetic valve and the second electromagnetic valve are respectively connected with an oxygen gas inlet pipe and an air gas inlet pipe, an exhaust pipe is further connected at the tail end of the gas transmission pipe, an expiratory valve and an exhaust valve are sequentially connected on the exhaust pipe, an outlet of the expiratory valve is also connected with the mixing container through a second proportional valve, and the controller is connected with the first electromagnetic valve, the second electromagnetic valve, the first flow sensor, the first proportional valve, the second.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a breathing machine air path control device.
Background
At present, when some seriously ill patients are treated, a breathing machine is needed to provide oxygen needed by physiology for the patients, and passive movement of the lungs is increased, so that the patients can recover spontaneous breathing as soon as possible, namely, the breathing machine can be used for preventing and treating respiratory failure and saving and prolonging the lives of the patients, and is mainly applied to hospital departments such as ICU (intensive care unit), respiratory department, emergency department and the like.
The breathing machine is a medical apparatus crossing electron, software, the complicated many fields such as hydrodynamics, belong to three types of the highest risk grade again simultaneously, for guaranteeing the security, the breathing machine internal system has integrated multiple accurate components and parts, real time control and its operating condition of monitoring, traditional breathing machine realizes the simultaneous control to flow and oxygen concentration through two proportional valves, carry out feedback and control through components and parts linkages such as oxygen proportional valve, air proportional valve, flow sensor and oxygen concentration sensor, control algorithm is complicated, control accuracy is general, the feedback control cycle is long, and because of proportional valve's cost is several times of other components and parts, flow sensor's cost is also higher, lead to breathing machine overall cost high.
In view of the above, it is desirable to provide a ventilator circuit control device with simple design and low cost to solve the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a breathing machine air passage control device which is simple in design and low in cost.
In order to solve the technical problems, the invention provides a breathing machine gas path control device, which comprises a controller, a first electromagnetic valve, a first flow sensor, a mixing container, a first proportional valve and a second flow sensor which are sequentially connected through a pipeline, wherein the outlet of the second flow sensor is connected with a gas pipe, the gas inlet end of the first flow sensor is also connected with a second electromagnetic valve, the gas inlet ends of the first electromagnetic valve and the second electromagnetic valve are respectively connected with an oxygen gas inlet pipe and an air gas inlet pipe, the tail end of the gas pipe is also connected with an exhaust pipe, the exhaust pipe is sequentially connected with an expiratory valve and an exhaust valve, the outlet of the expiratory valve is also connected with the mixing container through a second proportional valve, and the controller is connected with the first electromagnetic valve, the second electromagnetic valve, the first flow sensor, the first proportional valve, the second flow sensor and the second proportional valve, the first electromagnetic valve and the second electromagnetic valve are opened in sequence, the exhaust valve is controlled to be closed when air is sucked, the second proportional valve is opened, and the opening degree of the first proportional valve is adjusted according to the detection result of the second flow sensor; and during expiration, the first proportional valve and the second proportional valve are closed, the exhaust valve is opened, and the gas is exhausted through the exhaust valve.
The further technical scheme is as follows: the mixing container comprises a first gas tank, and a pressure release valve is arranged on the first gas tank.
The further technical scheme is as follows: the mixing container also comprises a pressure reducing valve and a second gas tank which are sequentially connected with the first gas tank through pipelines, and the second proportional valve and the first proportional valve are both connected with the second gas tank.
The further technical scheme is as follows: the breathing machine gas circuit control device further comprises a safety valve and a first pressure sensor, the first pressure sensor is arranged on the gas conveying pipe, the safety valve is connected between the first proportional valve and the second flow sensor, and the controller is connected with the first pressure sensor and the safety valve so as to control the safety valve to be opened and closed according to the detection result of the first pressure sensor.
The further technical scheme is as follows: the breathing machine gas circuit control device also comprises an oxygen sensor which is arranged on the gas transmission pipe and is used for detecting the oxygen concentration in the pipeline.
The further technical scheme is as follows: the breathing machine gas circuit control device also comprises a second pressure sensor which is arranged on the exhaust pipe and used for detecting the gas pressure in the pipeline.
The further technical scheme is as follows: the breathing machine gas circuit control device also comprises a third flow sensor which is arranged on the exhaust pipe and used for detecting the gas flow in the pipeline.
The further technical scheme is as follows: the breathing machine gas circuit control device also comprises a first filter and a second filter which are respectively arranged on the oxygen inlet pipe and the air inlet pipe.
The further technical scheme is as follows: the breathing machine gas circuit control device also comprises a third pressure sensor and a fourth pressure sensor which are respectively arranged on the oxygen inlet pipe and the air inlet pipe.
Compared with the prior art, the controller of the breathing machine gas circuit control device can periodically and sequentially open the first electromagnetic valve and the second electromagnetic valve so as to adjust the oxygen concentration through the first electromagnetic valve, the second electromagnetic valve and the first flow sensor, and can adjust the gas flow through the first proportional valve.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a ventilator circuit control device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a ventilator circuit control apparatus 100 according to an embodiment of the present invention. In the embodiment shown in the drawings, the breathing machine air path control device 100 includes a controller, and a first electromagnetic valve 101, a first flow sensor 102, a mixing container 103, a first proportional valve 104 and a second flow sensor 106 which are sequentially connected through a pipeline, an outlet of the second flow sensor 106 is connected with an air pipe 120, an air inlet end of the first flow sensor 102 is further connected with a second electromagnetic valve 110, air inlet ends of the first electromagnetic valve 101 and the second electromagnetic valve 110 are respectively connected with an oxygen inlet pipe and an air inlet pipe, an exhaust pipe 130 is further connected at a tail end of the air pipe 120, an exhalation valve 112 and an exhaust valve 114 are sequentially connected on the exhaust pipe 130, an outlet of the exhalation valve 112 is further connected with the mixing container 103 through a second proportional valve 113, and the controller is connected with the first electromagnetic valve 101, the second electromagnetic valve 110, the first flow sensor 102, the second flow sensor 106, The first proportional valve 104, the second flow sensor 106 and the second proportional valve 113 are connected to sequentially open the first electromagnetic valve 101 and the second electromagnetic valve 110, and control the exhaust valve 114 to close and open the second proportional valve 113 during air suction, and adjust the opening degree of the first proportional valve 104 according to the detection result of the second flow sensor 106; during exhalation, the first proportional valve 104 and the second proportional valve 113 are closed, the exhaust valve 114 is opened, and the gas is exhausted through the exhaust valve 114. Based on the above design, the controller of the present invention can set the time for opening and closing the first solenoid valve 101 and the second solenoid valve 110 according to the oxygen concentration required by the user, so as to open the first solenoid valve 101 and the second solenoid valve 110 periodically and sequentially according to the preset time, the first flow sensor 102 detects the gas flow to adjust and control the opening and closing of the first solenoid valve 101 and the second solenoid valve 110 in real time, so as to adjust the oxygen concentration through the first solenoid valve 101, the second solenoid valve 110 and the first flow sensor 102, and detect the gas flow through the second flow sensor 106, the controller controls the opening of the first proportional valve 104 according to the detection result of the second flow sensor 106 to adjust the flow rate of the gas, and it can be seen that the present invention realizes the individual control of the oxygen concentration and the flow, has a simple structure, a high control precision, and reduces the number of high-cost (proportional valve), the cost is low.
In some embodiments, the mixing container 103 includes a first gas tank 1031, a pressure reducing valve 1033 and a second gas tank 1034 connected in sequence by a pipeline, a pressure relief valve 1032 is provided on the first gas tank 1031, and the second proportional valve 113 and the first proportional valve 104 are both connected to the second gas tank 1034. Based on the design, air and oxygen are mixed in the first gas tank 1031, the pressure release valve 1032 can release the gas in the first gas tank 1031 to prevent the gas pressure in the first gas tank 1031 from being too large, and the pressure release valve 1033 can be used for adjusting the gas pressure of the gas in the pipeline to adjust the gas pressure in the first gas tank 1031 to the preset standard gas pressure so as to provide smooth gas.
In the embodiment shown in the drawings, the breathing machine air path control device 100 further includes a safety valve 105, an oxygen sensor 107 and a first pressure sensor 108, the oxygen sensor 107 and the first pressure sensor 108 are both disposed on the air delivery pipe 120, the safety valve 105 is connected between the first proportional valve 104 and the second flow sensor 106, and the controller is connected with the first pressure sensor 108, the oxygen sensor 107 and the safety valve 105 to control the opening and closing of the safety valve 105 according to the detection result of the first pressure sensor 108 and monitor whether the content of the oxygen concentration in the air delivery pipe 120 meets the requirement according to the detection result from the oxygen sensor 107. Based on the above design, the first pressure sensor 108 detects whether the pressure of the gas in the gas delivery pipe 120 is too high, the safety valve 105 will release the gas outwards when the pressure is too high, and the oxygen sensor 107 can be used to detect the oxygen concentration in the pipe to monitor whether the content of the oxygen concentration in the gas delivery pipe 120 meets the requirement.
In this embodiment, the breathing machine air path control device 100 further includes a second pressure sensor 109 and a third flow sensor 111 disposed on the exhaust pipe 130, where the second pressure sensor 109 is used for detecting the air pressure in the exhaust pipe 130, and the third flow sensor 111 is used for detecting the air flow in the exhaust pipe 130.
In some embodiments, the ventilator circuit control apparatus 100 further includes a first filter 115 and a third pressure sensor 116 sequentially disposed in the oxygen intake pipe, and a second filter 117 and a fourth pressure sensor 118 sequentially disposed in the air intake pipe, where the first filter 115 and the second filter 117 are respectively configured to filter oxygen, dust in air, and the like to purify gas, and the third pressure sensor 116 and the fourth pressure sensor 118 are respectively configured to detect pressure values of gas in the oxygen intake pipe and the air intake pipe.
As can be seen from the attached drawings, the oxygen source gas flows through the third pressure sensor 116 and the first solenoid valve 101 after passing through the first filter 115, the current gas pressure value in the oxygen inlet pipe can be known through the third pressure sensor 116, the air source gas flows through the fourth pressure sensor 118 and the second solenoid valve 110 after passing through the second filter 117, the current gas pressure value in the air inlet pipe can be known through the fourth pressure sensor 118, and it is understood that when the breathing machine gas circuit control device 100 of the present invention operates, the controller sets the time for switching on and off the first solenoid valve 101 and the second solenoid valve 110, so as to sequentially open the first solenoid valve 101 and the second solenoid valve 110 according to the preset time period, and the first flow sensor 102 can detect the gas flow, so as to adjust the switching on and off of the first solenoid valve 101 and the second solenoid valve 110 in a real-time feedback manner, so as to match the gas meeting the requirement, the oxygen source gas and the air source gas flow into the first gas source tank 1031 after passing through the first, and then through a pressure relief valve 1033 to the second gas tank 1034. the pressure relief valve 1033 is used to adjust the gas pressure in the line to a predetermined standard pressure for the gas from the first gas tank 1031 to provide a smooth gas.
When the patient inhales, a part of the gas in the second gas tank 1034 flows through the first proportional valve 104, the safety valve 105, the second flow sensor 106, the oxygen sensor 107 and the first pressure sensor 108, and then is transmitted to the patient, the first proportional valve 104 adjusts the flow rate of the gas according to the detection result of the second flow sensor 106, the oxygen sensor 107 is used for monitoring whether the oxygen concentration content in the pipeline of the gas transmission pipe 120 meets the requirement, the first pressure sensor 108 is used for detecting whether the pressure of the gas in the gas transmission pipe 120 is too high, the safety valve 105 releases the gas outwards when the pressure is too high, while the gas is transmitted to the patient, the second proportional valve 113 is opened, the exhaust valve 114 is closed, the second gas tank 1034 releases another part of the gas, the gas flows through the second proportional valve 113 and then is transmitted to the exhalation valve 112, at this time, the input gas pushes against the piston of the exhalation valve 112, so that the exhalation valve 112 cannot discharge the gas, the patient can only inhale.
When the patient exhales, the first proportional valve 104 is closed to prevent gas from entering the patient, the gas exhaled by the patient flows through the second pressure sensor 109 and the third flow sensor 111 and then enters the exhalation valve 112, the second proportional valve 113 is closed, the exhaust valve 114 is opened, and when the gas exhaled by the patient enters the exhalation valve 112, because no gas abuts against the piston, the exhaled gas can pass through the exhalation valve 112 and be exhausted through the exhaust valve 114.
In summary, the controller of the gas circuit control device of the breathing machine of the present invention can periodically and sequentially open the first solenoid valve and the second solenoid valve to adjust the oxygen concentration through the first solenoid valve, the second solenoid valve and the first flow sensor, and can adjust the gas flow through the first proportional valve.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a breathing machine gas circuit controlling means which characterized in that: the breathing machine gas path control device comprises a controller, and a first electromagnetic valve, a first flow sensor, a mixing container, a first proportional valve and a second flow sensor which are sequentially connected through a pipeline, wherein an outlet of the second flow sensor is connected with a gas pipe, an air inlet end of the first flow sensor is also connected with a second electromagnetic valve, air inlet ends of the first electromagnetic valve and the second electromagnetic valve are respectively connected with an oxygen gas inlet pipe and an air gas inlet pipe, the tail end of the gas pipe is also connected with an exhaust pipe, the exhaust pipe is sequentially connected with an expiratory valve and an exhaust valve, an outlet of the expiratory valve is also connected with the mixing container through a second proportional valve, and the controller is connected with the first electromagnetic valve, the second electromagnetic valve, the first flow sensor, the first proportional valve, the second flow sensor and the second proportional valve so as to sequentially open the first electromagnetic valve and the second electromagnetic valve, when air is sucked, the exhaust valve is controlled to be closed, the second proportional valve is opened, and the opening degree of the first proportional valve is adjusted according to the detection result of the second flow sensor; and during expiration, the first proportional valve and the second proportional valve are closed, the exhaust valve is opened, and the gas is exhausted through the exhaust valve.
2. The ventilator circuit control device according to claim 1, wherein: the mixing container comprises a first gas tank, and a pressure release valve is arranged on the first gas tank.
3. The ventilator circuit control device according to claim 2, wherein: the mixing container also comprises a pressure reducing valve and a second gas tank which are sequentially connected with the first gas tank through pipelines, and the second proportional valve and the first proportional valve are both connected with the second gas tank.
4. The ventilator circuit control device according to claim 1, wherein: the breathing machine gas circuit control device further comprises a safety valve and a first pressure sensor, the first pressure sensor is arranged on the gas conveying pipe, the safety valve is connected between the first proportional valve and the second flow sensor, and the controller is connected with the first pressure sensor and the safety valve so as to control the safety valve to be opened and closed according to the detection result of the first pressure sensor.
5. The ventilator circuit control device according to claim 1, wherein: the breathing machine gas circuit control device also comprises an oxygen sensor which is arranged on the gas transmission pipe and is used for detecting the oxygen concentration in the pipeline.
6. The ventilator circuit control device according to claim 1, wherein: the breathing machine gas circuit control device also comprises a second pressure sensor which is arranged on the exhaust pipe and used for detecting the gas pressure in the pipeline.
7. The ventilator circuit control device according to claim 1, wherein: the breathing machine gas circuit control device also comprises a third flow sensor which is arranged on the exhaust pipe and used for detecting the gas flow in the pipeline.
8. The ventilator circuit control device according to claim 1, wherein: the breathing machine gas circuit control device also comprises a first filter and a second filter which are respectively arranged on the oxygen inlet pipe and the air inlet pipe.
9. The ventilator circuit control device according to claim 1, wherein: the breathing machine gas circuit control device also comprises a third pressure sensor and a fourth pressure sensor which are respectively arranged on the oxygen inlet pipe and the air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038742.9A CN111110969A (en) | 2020-01-14 | 2020-01-14 | Breathing machine gas circuit controlling means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038742.9A CN111110969A (en) | 2020-01-14 | 2020-01-14 | Breathing machine gas circuit controlling means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111110969A true CN111110969A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010038742.9A Pending CN111110969A (en) | 2020-01-14 | 2020-01-14 | Breathing machine gas circuit controlling means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111110969A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915332A (en) * | 2021-03-01 | 2021-06-08 | 北京航空航天大学 | Multi-channel respirator based on pneumatic system |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915332A (en) * | 2021-03-01 | 2021-06-08 | 北京航空航天大学 | Multi-channel respirator based on pneumatic system |
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