CN112657032B - Gas circuit structure and breathing machine - Google Patents
Gas circuit structure and breathing machine Download PDFInfo
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- CN112657032B CN112657032B CN202011402959.XA CN202011402959A CN112657032B CN 112657032 B CN112657032 B CN 112657032B CN 202011402959 A CN202011402959 A CN 202011402959A CN 112657032 B CN112657032 B CN 112657032B
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Abstract
The invention discloses a gas path structure and a breathing machine, wherein a first gas path and a second gas path and a first gas path and a third gas path are conducted by arranging a switching device, a first working mode is formed by conducting the first gas path and the second gas path, a second working mode is formed by conducting the first gas path and the third gas path, when the gas supply of the first gas path fails through a central gas supply system, the first gas path is switched into the second working mode through the switching device, and a mixing device and gas compression equipment are arranged in the third gas path, so that when the gas supply system is separated from the central gas supply system, the environment air can be directly adopted from the environment through the third gas path and is processed through the third gas path to meet the specified gas supply requirement; and the output ends of the first, second and third air paths are connected with the output connector by arranging the output connector and the controller, and the controller controls the switching device to coordinate the conduction of the first, second and third air paths to form an air path structure which is independent of a central air supply system and at least has two air supply modes and a respirator.
Description
Technical Field
The invention relates to the technical field of breathing machines, in particular to a gas path structure and a breathing machine.
Background
A ventilator is a medical device for assisting a patient who has difficulty in breathing or who cannot breathe by himself/herself to perform mechanical ventilation, and generally requires two kinds of source gases, oxygen and air, to be mixed to output a mixed gas having a desired oxygen concentration to the patient.
At present, most of the ventilators on the market can normally work only through a central air supply system, and when the central air supply system is not available or cannot be used under special conditions, the conventional ventilators are difficult to rescue and treat patients.
Disclosure of Invention
In view of the above, the object of the present invention is: a gas path structure independent of a central gas supply system and a respirator are provided.
In order to achieve one or a part of or all of the above objects or other objects, the present invention provides, in one aspect, an air path structure, including a first air source connector, a first pressure monitoring device, a first pressure regulating device, a first flow regulating device, and a first flow sensor, which are connected in sequence; the second gas circuit comprises a second gas source joint, a second pressure monitoring device, a second pressure regulating device, a second flow regulating device and a second flow sensor which are sequentially connected; the third gas path comprises a third gas source joint, a filter, a third pressure monitoring device, a mixing device, gas compression equipment, a third flow regulating device and a third flow sensor which are sequentially connected; and the switching device is used for conducting the first air path and the second air path as well as the first air path and the third air path, so that the air path structure forms at least two working modes.
Optionally, the first air path further includes a safety relief valve, and the safety relief valve is disposed between the first air source interface and the first pressure monitoring device, and is configured to relieve pressure.
Optionally, the third air path further includes a check valve, and the check valve is connected between the third pressure monitoring device and the mixing device.
Optionally, the first pressure regulating device and the second pressure regulating device are pressure regulating valves; the first flow regulating device, the second flow regulating device and the third flow regulating device are electromagnetic proportional valves.
Optionally, the first flow sensor is an oxygen flow sensor.
Optionally, the second flow sensor and the third flow sensor are air flow sensors.
Optionally, the gas compression device is a turbine.
Optionally, the switching device includes a first two-position three-way valve, a second two-position three-way valve, a first pneumatic switch valve and a second pneumatic switch valve, and the first two-position three-way valve and the first pneumatic switch are disposed between the first gas path and the second gas path and are used for controlling the conduction state of the first gas path and the second gas path; the second two-position three-way valve and the second pneumatic control switch valve are arranged between the first air path and the third air path and used for controlling the conduction state of the first air path and the third air path.
Optionally, the gas-liquid separator further comprises a fourth gas path, and an output end of a first working mode formed by the first gas path and the second gas path and an output end of a second working mode formed by the first gas path and the third gas path are both connected with an input end of the fourth gas path.
The invention provides a breathing machine which comprises an output connector, a controller and any one of the air path structures, wherein the output ends of the first air path, the second air path and the third air path are connected with the output connector, the switching device is connected with the controller, and the controller controls the switching device to coordinate the conduction of the first air path and the second air path and the conduction of the first air path and the third air path.
The implementation of the invention has the following beneficial effects:
the first air path and the second air path are communicated through the switching device, the first air path and the third air path are communicated, a first working mode is formed by the communication of the first air path and the second air path, a second working mode is formed by the communication of the first air path and the third air path, when the air supply of the first air path through the central air supply system fails, the first air path is switched to the second working mode through the switching device, and the third air path is internally provided with the mixing device and the air compression equipment, so that when the central air supply system is separated, the ambient air can be directly supplied from the environment through the third air path after being processed through the third air path to meet the specified air supply requirement; and the output ends of the first, second and third air paths are connected with the output connector by arranging the output connector and the controller, and the controller controls the switching device to coordinate the conduction of the first air path and the second air path as well as the conduction of the first air path and the third air path to form an air path structure which is independent of a central air supply system and at least has two air supply modes and a respirator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an embodiment of an air path structure of the present invention;
FIG. 2 is a schematic view of a first operating mode of the gas path structure;
FIG. 3 is a schematic view of a second operating mode of the gas path structure;
FIG. 4 is a system block diagram of one embodiment of a ventilator.
In the figure: 1-a first gas path; 11-a first gas supply connection; 12-a first pressure monitoring device; 13-a first pressure regulating device; 14-a first flow regulating device; 15-a first flow sensor; 16-safety relief valve; 2-a second gas path; 21-a second gas supply connection; 22-a second pressure monitoring device; 23-a second pressure regulating device; 24-a second flow regulating device; 25-a second flow sensor; 3-a third gas path; 31-a third gas supply connection; 32-a filter; 33-a third pressure monitoring device; 34-a mixing device; 35-a gas compression device; 36-third flow regulating means; 37-a third flow sensor; 38-a one-way valve; 4-a switching device; 41-a first two-position three-way valve; 42-a second two-position three-way valve; 43-a first pneumatic switch; 44-a second pneumatic control switch; 45-control panel; 5-a fourth gas path; 6-output connector; 7-a controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as according to the upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (according to the figure), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a schematic diagram of an embodiment of an air path structure of the present invention, and referring to fig. 1, the air path structure includes a first air path 1, a second air path 2, a third air path 3, and a switching device 4, the switching device 4 switches the first air path 1 and the second air path 2 to form a first working mode, and switches the first air path 1 and the third air path 3 to form a second working mode. Specifically, the first air path 1 includes a first air source connector 11, a first pressure monitoring device 12, a first pressure regulating device 13, a first flow regulating device 14 and a first flow sensor 15, which are connected in sequence, the first air source connector 11 is connected to a high-pressure oxygen source, and after the pressure is regulated by the first pressure regulating device 13, the high-pressure oxygen source is conveyed to the first flow regulating device 14. Optionally, the air pressure range of the high-pressure oxygen source is 280kPa to 650kPa, the first pressure regulating device 13 is a pressure regulating valve, the pressure of the high-pressure oxygen is regulated by the pressure regulating valve, the use is convenient and reliable, and the universality is strong. The first flow regulating device 14 is used for regulating the gas flow at the rear end of the first pressure regulating device 13, and the first flow regulating device 14 can be an electromagnetic proportional valve, so that the use is convenient, and the sensitivity is high. Further, a first flow sensor 15 is used to measure the gas flow through the first flow regulating device 14. Preferably, the first flow sensor 15 is an oxygen flow sensor. The pressure and the flow of the gas entering the first gas path 1 can be respectively regulated and monitored through the first pressure regulating device 13, the first flow regulating device 14 and the first flow sensor 15, so that the gas can be uniformly and stably output through the first gas path 1, and the reliability of the first gas path 1 is guaranteed.
In one embodiment, the first gas circuit 1 further includes a safety relief valve 16, and the safety relief valve 16 is disposed between the first gas source connector 11 and the first pressure monitoring device 12, and is used for relieving pressure of the first gas circuit 1, so as to prevent damage to the first gas circuit 1 due to overhigh pressure in the first gas circuit 1 in an unexpected situation.
The second air circuit 2 comprises a second air source connector 21, a second pressure monitoring device 22, a second pressure regulating device 23, a second flow regulating device 24 and a second flow sensor 25. Specifically, the second air source connector 21 is connected to a high-pressure air source, the specified air pressure range is 280kPa to 650kPa, and meanwhile, the second pressure monitoring device 22 detects the air pressure passing through the second air source connector 21 intermittently or in real time; after the pressure is regulated by the second pressure regulating device 23, the gas is conveyed to the second flow regulating device 24 to control the flow of the gas, and then the actual flow of the gas is monitored by the second flow sensor 25, so that the gas conveyed by the second gas path 2 can continuously and stably meet the specified requirements. More specifically, the second pressure regulating device 23 is a pressure regulating valve, which is convenient to use, stable and reliable; the second flow regulating device 24 is an electromagnetic proportional valve, is convenient to use, simple to control and high in response speed, and can ensure the timeliness of the gas flow regulation in the second gas path 2; the second flow sensor 25 is an air flow sensor, and is configured to monitor an actual flow of the gas adjusted by the second flow adjusting device 24, and ensure consistency between the actual flow and the gas flow adjusted by the second flow adjusting device 24, thereby ensuring reliability of gas delivery in the second gas circuit 2.
The third gas circuit 3 includes a third gas source connector 31, a filter 32, a third pressure monitoring device 33, a mixing device 34, a gas compressing device 35, a third flow regulating device 36 and a third flow sensor 37, which are connected in sequence. Specifically, the third gas source connector 31 is connected to a gas source which is ambient air and non-high-pressure gas, and generates air meeting the medical and health standards after being filtered by the filter 32, and then enters the mixing device 34 located between the third pressure monitoring device 33 and the gas compression equipment 35, the gas in the first gas path 1 enters the mixing device 34 located between the third pressure monitoring device 33 and the gas compression equipment 35, and is mixed with the gas in the third gas path 3, and then enters the gas compression equipment 35, after being monitored by the third pressure monitoring device 33, the gas meeting the specified requirements is sent to the third flow regulating device 36, the third flow regulating device 36 is used for regulating the gas flow output by the gas compression equipment 35, and then the flow of the gas is monitored by the third flow sensor 37 intermittently or in real time, and the gas meeting the requirements is sent to the next station. More specifically, the filter 32 is a high efficiency air filter (HEPA) that can reliably convert ambient air to air that meets medical and health standards; the gas compression equipment 35 is a turbine, so that the use is convenient and reliable; the third flow regulating device 36 is an electromagnetic proportional valve; the third flow sensor 37 is an air flow sensor, and is configured to monitor the air pressure adjusted by the third flow adjustment device 36, ensure that the air flow adjusted by the third flow sensor 37 is consistent with the actual air flow, and further ensure the reliability of gas delivery adjustment of the third gas path 3.
In one embodiment, the third air path 3 further comprises a check valve 38, the check valve 38 is connected between the third pressure monitoring device 33 and the mixing device 34 and is disposed along a direction from the third flow sensor 37 to the mixing device 34, and the check valve 38 is in a conducting state and in a closing state in the reverse direction. Under the condition of conducting the first air path 1 and the second air path 2, the third air path 3 can be effectively separated by the one-way valve 38, and the accuracy of measuring and conveying the air in the first air path 1 and the second air path 2 is guaranteed.
The switching device 4 comprises a first two-position three-way valve 41, a second two-position three-way valve 42, a first pneumatic switch 43 and a second pneumatic switch 44, the first two-position three-way valve 41 and the first pneumatic switch 43 are arranged between the first air path 1 and the second air path 2, and the conduction state of the first air path 1 and the second air path 2 is controlled by controlling the first two-position three-way valve 41 and the first pneumatic switch 43 to form a first working mode; the second two-position three-way valve 42 and the second pneumatic control switch 44 are disposed between the first air path 1 and the third air path 3, and are configured to control a conduction state of the first air path 1 and the third air path 3, so as to form a second working mode.
In one embodiment, the switching device 4 further includes a control board 45, and the control board 45 is electrically connected to the first two-position three-way valve 41, the second two-position three-way valve 42, the first pressure monitoring device 12, the second pressure monitoring device 22, and the third pressure monitoring device 33, respectively. When the measured value of the second pressure monitoring device 22 is outside the specified range (for example, the measured pressure value is less than or equal to 180 kPa), the control board 45 controls the second two-position three-way valve 42 to operate and drive the second pneumatic switch 44 to be opened, that is, the second working mode is opened, and then controls the first two-position three-way valve 41 to operate and drive the first pneumatic switch 43 to be closed, that is, the first working mode is closed, so that the central gas supply system can be independent; alternatively, when the measured value of the second pressure monitoring device 22 is within the specified range (for example, the measured pressure value is greater than 180 Kpa), the control board 45 controls the first two-position three-way valve 41 to operate to drive the first pneumatic switch 43 to be opened, i.e., to start the first operating mode, and then controls the second two-position three-way valve 42 to operate to drive the second pneumatic switch 44 to be closed, i.e., to close the second operating mode. Therefore, the gas circuit structure has two working modes, and the working modes can be conveniently and flexibly switched when an emergency occurs, so that the working reliability of the gas circuit structure is guaranteed.
In an embodiment, the air path structure further includes a fourth air path 5, and an output end of a first working mode formed by the first air path 1 and the second air path 2 and an output end of a second working mode formed by the first air path 1 and the third air path 3 are both connected to an input end and an output end of the fourth air path 5, specifically, the first air path 1, the second air path 2, and the third air path 3 may be air suction branches, and the fourth air path 5 is an air exhalation branch.
Fig. 2 is a schematic diagram of a first working mode of the gas circuit structure, referring to fig. 2, when the gas circuit structure is in the first working mode, the first two-position three-way valve 41 controls the first pneumatic switch 43 to be opened, so that the first gas circuit 1 is conducted with the second gas circuit 2, the first gas source connector 11 of the first gas circuit 1 is connected to the high-pressure oxygen gas source, and after passing through the first pressure monitoring device 12 and the safety relief valve 16, the high-pressure oxygen gas source enters the first pressure regulating device 13, and then the gas is mixed with the gas fed into the mixing device 34 and the second gas circuit 2 after passing through the first flow regulating device 14 and the first flow sensor 15. The second air source joint 21 of the second air path 2 is connected to a high-pressure air source, and the high-pressure air source enters the mixing device 34 through the second pressure monitoring device 22, the second pressure regulating device 23, the second flow regulating device 24 and the second flow sensor 25 to be mixed with the gas output by the first air path 1, so that the gas meeting the specified requirements is obtained and is supplied to the patient.
Fig. 3 is a schematic diagram of a second working mode of the gas circuit structure, referring to fig. 3, when the gas circuit structure is in the second working mode, the first two-position three-way valve 41 controls the first pneumatic switch 43 to be closed, and the second two-position three-way valve 42 controls the second pneumatic switch 44 to be opened, so that the first gas circuit 1 and the second gas circuit 2 are closed, and the first gas circuit 1 and the third gas circuit 3 are connected. The first gas source joint 11 of the first gas path 1 is connected to a high-pressure oxygen gas source, and after passing through the first pressure monitoring device 12 and the safety relief valve 16, the high-pressure oxygen gas source enters the first pressure regulating device 13, and after passing through the first flow regulating device 14 and the first flow sensor 15, the high-pressure oxygen gas source enters the mixing device 34 of the third gas path 3 through the second pneumatic control switch 44 to be mixed with the gas in the third gas path 3. The third gas source connector 31 of the third gas path 3 is connected to ambient air, passes through the filter 32, passes through the third pressure monitoring device 33, and enters the mixing device 34, so that the gases in the first gas path 1 and the third gas path 3 are mixed in the mixing device 34, the pressure is regulated by the gas compression device 35, the flow is regulated by the third flow regulating device 36, and the flow is monitored by the third flow sensor 37, and then enters the other mixing device 34 through the one-way valve 38 for the patient to use.
Fig. 4 is a system block diagram of an embodiment of a breathing machine, referring to fig. 4, the breathing machine includes an output connector 6, a controller 7 and the above-mentioned air path structure, wherein output ends of a first air path 1, a second air path 2 and a third air path 3 are all connected with the output connector 6, the switching device 4 is electrically connected with the controller 7, the controller 7 controls the switching device 4 to coordinate the conduction of the first, second and third air paths to form an inspiration loop, and then the waste gas breathed by the patient is sent out through a fourth air path 5, of course, the controller 7 controls the switching device 4 to coordinate the conduction of the first, second and third air paths to be a first working mode and a second working mode of the switching air path structure, so as to form a breathing machine having at least two working modes, which is stable and reliable and can not depend on a central air supply system, and the breathing machine adopting the two working modes is designed as a sub-module.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. Gas circuit structure, its characterized in that includes:
the first gas path comprises a first gas source connector, a first pressure monitoring device, a first pressure regulating device, a first flow regulating device and a first flow sensor which are sequentially connected;
the second gas circuit comprises a second gas source joint, a second pressure monitoring device, a second pressure regulating device, a second flow regulating device and a second flow sensor which are sequentially connected;
the third gas path comprises a third gas source joint, a filter, a third pressure monitoring device, a mixing device, gas compression equipment, a third flow regulating device and a third flow sensor which are sequentially connected;
the switching device is used for conducting the first air path and the second air path as well as the first air path and the third air path, so that the air path structure forms at least two working modes;
the switching device comprises a first two-position three-way valve, a second two-position three-way valve, a first pneumatic control switch valve and a second pneumatic control switch valve, and the first two-position three-way valve and the first pneumatic control switch are arranged between the first air path and the second air path and are used for controlling the conduction state of the first air path and the second air path;
the second two-position three-way valve and the second pneumatic control switch valve are arranged between the first air path and the third air path and used for controlling the conduction state of the first air path and the third air path.
2. The gas circuit structure according to claim 1, wherein the first gas circuit further comprises a safety relief valve, and the safety relief valve is disposed between the first gas source interface and the first pressure monitoring device for pressure relief.
3. The air circuit structure according to claim 1, wherein the third air circuit further comprises a check valve connected between the third pressure monitoring device and the mixing device.
4. The gas circuit structure according to any one of claims 1 to 3, wherein the first pressure regulating device and the second pressure regulating device are pressure regulating valves; the first flow regulating device, the second flow regulating device and the third flow regulating device are electromagnetic proportional valves.
5. The gas circuit structure according to any one of claims 1 to 3, wherein the first flow sensor is an oxygen flow sensor.
6. The air path structure according to claim 5, wherein the second and third flow sensors are air flow sensors.
7. The gas circuit structure according to claim 1, wherein the gas compression device is a turbine.
8. The air path structure according to claim 1, further comprising a fourth air path, wherein an output end of the first working mode formed by the first air path and the second air path and an output end of the second working mode formed by the first air path and the third air path are both connected to an input end of the fourth air path.
9. A breathing machine, characterized in that, includes output joint, controller and the gas circuit structure of any one of claims 1 to 8, wherein the output end of the first, second, third gas circuit all with output joint is connected, switching device with the controller is connected, controller control switching device coordinate first gas circuit and second gas circuit, first gas circuit and third gas circuit switch on.
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| CN2020113705858 | 2020-11-30 | ||
| CN202011370585 | 2020-11-30 |
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| CN112657032A CN112657032A (en) | 2021-04-16 |
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| CN115054788A (en) * | 2022-06-16 | 2022-09-16 | 广州蓝仕威克医疗科技有限公司 | Control device and breathing machine of accurate regulation gas mixture and flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102014109394A1 (en) * | 2014-07-04 | 2016-01-07 | Ms Westfalia Gmbh | breathing device |
| US20160287824A1 (en) * | 2015-04-03 | 2016-10-06 | Invent Medical Corporation | Ventilator |
| EP3682930B1 (en) * | 2017-09-13 | 2022-11-02 | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | Ventilator for gas supply control |
| CN211884849U (en) * | 2019-09-26 | 2020-11-10 | 泰州市久信医疗科技有限公司 | Breathing machine gas circuit |
| CN211658975U (en) * | 2019-12-19 | 2020-10-13 | 深圳哈维生物医疗科技有限公司 | Gas circuit with multiple gas source branches and breathing machine thereof |
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