Air path system and breathing machine

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an air path system and a breathing machine. The air path system comprises an inspiration pressure sensor, an inspiration calibration valve, an expiration pressure sensor and an expiration calibration valve; the suction pressure sensor is communicated with the suction loop through the suction calibration valve, and the suction calibration valve is used for enabling the suction pressure sensor to be communicated with the suction loop or atmosphere; the expiration pressure sensor is communicated with the expiration loop through the expiration calibration valve, and the expiration calibration valve is used for enabling the expiration pressure sensor to be communicated with the expiration loop or the atmosphere. According to the utility model, due to the design of the inspiration calibration valve and the expiration pressure sensor, the expiration pressure sensor and the expiration pressure sensor can be marked, so that the problem that the detection precision is reduced due to the fact that the expiration pressure sensor and the expiration pressure sensor are used for a long time is solved; and the detection precision of the expiration pressure sensor and the expiration pressure sensor is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a gas circuit system and a ventilator. Background Art

[0002] A ventilator is a medical device that can replace, control, or change a person's normal physiological breathing, enhance pulmonary ventilation volume, improve respiratory function, reduce the consumption of respiratory work, and save the heart's reserve capacity. The gas circuit structure is an important part of the ventilator. The gas circuit structure can realize the mixing of air and oxygen, input the air-oxygen mixed gas to the patient end, and can monitor various parameters of the patient's exhaled gas.

[0003] In the prior art, although an inspiratory pressure sensor and an expiratory pressure sensor are provided in the gas circuit structure; however, after the inspiratory pressure sensor and the expiratory pressure sensor are used for a period of time, their sensitivity will decrease, resulting in low accuracy of the pressure values detected by the ventilator. Summary of the Utility Model

[0004] The utility model solves the technical problem of low accuracy of the pressure values detected by the inspiratory pressure sensor and the expiratory pressure sensor in the gas circuit structure of the prior art, and provides a gas circuit system and a ventilator.

[0005] In view of the above problems, a gas circuit system provided by an embodiment of the utility model includes an air circuit, an oxygen circuit, a mixing chamber, an inspiratory circuit, and an expiratory circuit; the air circuit communicates with the air inlet of the mixing chamber, and the oxygen circuit communicates with the oxygen inlet of the mixing chamber;

[0006] The gas circuit system further includes an inspiratory pressure sensor, an inspiratory calibration valve, an expiratory pressure sensor, and an expiratory calibration valve; the inspiratory pressure sensor communicates with the inspiratory circuit through the inspiratory calibration valve, and the inspiratory calibration valve is used to make the inspiratory pressure sensor communicate with the inspiratory circuit or the atmosphere;

[0007] The expiratory pressure sensor communicates with the expiratory circuit through the expiratory calibration valve, and the expiratory calibration valve is used to make the expiratory pressure sensor communicate with the expiratory circuit or the atmosphere.

[0008] Optionally, the air circuit includes an air interface, an air check valve, and an air metering valve connected in sequence, and one end of the air metering valve away from the air check valve communicates with the air inlet of the mixing chamber;

[0009] The oxygen circuit includes an oxygen interface, an oxygen check valve, and an oxygen metering valve connected in sequence, and one end of the oxygen metering valve away from the oxygen check valve communicates with the oxygen inlet of the mixing chamber.

[0010] Optionally, the air circuit further includes an air pressure regulating valve, and the oxygen circuit further includes an oxygen pressure regulating valve; the gas circuit system further includes an atomizer mixing valve and an atomizer interface;

[0011] The inlet of the air pressure regulating valve communicates with the air circuit between the air check valve and the air metering valve, and the inlet of the oxygen pressure regulating valve communicates with the air circuit between the oxygen check valve and the oxygen metering valve; the outlet of the air pressure regulating valve communicates with the first inlet of the atomizer mixing valve, the outlet of the oxygen pressure regulating valve communicates with the second inlet of the atomizer mixing valve, and the outlet of the atomizer mixing valve communicates with the atomizer interface.

[0012] Optionally, the gas circuit system further includes a switching valve. The outlet through hole of the atomizer mixing valve communicates with the atomizer interface through the switching valve, and the switching valve is used to control the on-off between the outlet of the atomizer mixing valve and the atomizer interface.

[0013] Optionally, the inhalation circuit includes a mixture gas metering valve, a flow regulating valve, a flow sensor, an oxygen concentration sensor, and an inhalation interface connected in sequence; one end of the inhalation calibration valve away from the inhalation pressure sensor communicates with the inhalation circuit between the mixture gas metering valve and the flow regulating valve.

[0014] Optionally, the gas circuit system includes a safety valve. The inlet of the safety valve communicates with the inhalation circuit between the mixture gas metering valve and the flow regulating valve, the outlet of the safety valve communicates with the atmosphere, and the safety valve is used to control the on-off between the atmosphere and the inhalation circuit.

[0015] Optionally, the exhalation circuit includes an exhalation interface, a carbon dioxide concentration sensor, an exhalation check valve, and an exhalation flow sensor connected in sequence; one end of the exhalation calibration valve away from the exhalation pressure sensor communicates with the exhalation circuit between the carbon dioxide concentration sensor and the exhalation check valve.

[0016] Another embodiment of the present invention further provides a ventilator, including the above gas circuit system.

[0017] In the present utility model, when the inspiration calibration valve controls the inspiration pressure sensor not to communicate with the atmosphere, the inspiration pressure sensor can measure in real time the pressure of the air-oxygen mixture input from the inspiration circuit to the patient end; when the inspiration calibration valve controls the inspiration pressure sensor to communicate with the atmosphere, the inspiration pressure sensor communicates with the atmosphere and performs pressure calibration. Similarly, when the expiration calibration valve controls the expiration pressure sensor not to communicate with the atmosphere, the expiration pressure sensor can measure in real time the pressure of the exhaled gas input from the expiration circuit to the patient end; when the expiration calibration valve controls the expiration pressure sensor to communicate with the atmosphere, the expiration pressure sensor communicates with the atmosphere and performs pressure calibration. In the present utility model, the design of the inspiration calibration valve and the expiration calibration valve can mark the expiration pressure sensor and the inspiration pressure sensor, avoiding the problem that the detection accuracy of the expiration pressure sensor and the inspiration pressure sensor decreases due to long-term use, and ensuring the detection accuracy of the expiration pressure sensor and the inspiration pressure sensor. Brief Description of the Drawings

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the gas circuit system provided by an embodiment of the present utility model.

[0020] The reference numerals in the specification are as follows:

[0021] 1. Air circuit; 11. Air interface; 12. Air check valve; 13. Air metering valve; 14. Air pressure regulating valve; 2. Oxygen circuit; 21. Oxygen interface; 22. Oxygen check valve; 23. Oxygen metering valve; 24. Oxygen pressure regulating valve; 3. Mixing chamber; 4. Inspiration circuit; 41. Mixed gas metering valve; 42. Flow regulating valve; 43. Oxygen concentration sensor; 44. Inspiration interface; 5. Expiration circuit; 51. Expiration interface; 52. Carbon dioxide concentration sensor; 53. Expiration check valve; 54. Expiration flow sensor; 6. Inspiration pressure sensor; 7. Inspiration calibration valve; 8. Expiration pressure sensor; 9. Expiration calibration valve; 101. Nebulizer mixing valve; 102. Nebulizer interface; 103. Switch valve; 104. Safety valve. Detailed Embodiment

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] It should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "middle", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0024] As Figure 1 shown, an embodiment of the present invention provides a gas path system, including an air circuit 1, an oxygen circuit 2, a mixing chamber 3, an inhalation circuit 4, and an exhalation circuit 5; the air circuit 1 communicates with the air inlet of the mixing chamber 3, and the oxygen circuit 2 communicates with the oxygen inlet of the mixing chamber 3; it can be understood that one end of the air circuit 1 away from the mixing chamber 3 can communicate with the atmosphere, an air compressor, etc., and one end of the oxygen circuit 2 away from the mixing chamber 3 can communicate with a high-pressure oxygen tank, etc. Thus, the air circuit 1 can input air into the mixing chamber 3, and the oxygen circuit 2 can input oxygen into the mixing chamber 3. After the air and oxygen are mixed in the mixing chamber 3, they are input to the patient end through the inhalation circuit 4; the gas exhaled by the patient can be output through the exhalation circuit 5.

[0025] The gas path system further includes an inhalation pressure sensor 6, an inhalation calibration valve 7, an exhalation pressure sensor 8, and an exhalation calibration valve 9; the inhalation pressure sensor 6 communicates with the inhalation circuit 4 through the inhalation calibration valve 7, and the inhalation calibration valve 7 is used to make the inhalation pressure sensor 6 communicate with the inhalation circuit 4 or the atmosphere;

[0026] The exhalation pressure sensor 8 communicates with the exhalation circuit 5 through the exhalation calibration valve 9, and the exhalation calibration valve 9 is used to make the exhalation pressure sensor 8 communicate with the exhalation circuit 5 or the atmosphere.

[0027] In the present utility model, when the inhalation calibration valve 7 controls the inhalation pressure sensor 6 not to communicate with the atmosphere, the inhalation pressure sensor 6 can measure in real time the pressure of the air-oxygen mixture input from the inhalation circuit 4 to the patient end; when the inhalation calibration valve 7 controls the inhalation pressure sensor 6 to communicate with the atmosphere, the inhalation pressure sensor 6 communicates with the atmosphere and calibrates the pressure. Similarly, when the exhalation calibration valve 9 controls the exhalation pressure sensor 8 not to communicate with the atmosphere, the exhalation pressure sensor 8 can measure in real time the pressure of the exhaled gas input from the exhalation circuit 5 to the patient end; when the exhalation calibration valve 9 controls the exhalation pressure sensor 8 to communicate with the atmosphere, the exhalation pressure sensor 8 communicates with the atmosphere and calibrates the pressure. In the present utility model, the design of the inhalation calibration valve 7 and the inhalation calibration valve 7 can mark the exhalation pressure sensor 8 and the exhalation pressure sensor 8, avoiding the problem that the detection accuracy of the exhalation pressure sensor 8 and the exhalation pressure sensor 8 decreases due to long-term use, and ensuring the detection accuracy of the exhalation pressure sensor 8 and the exhalation pressure sensor 8.

[0028] In one embodiment, as Figure 1 shown, the air circuit 1 includes an air interface 11, an air check valve 12, and an air metering valve 13 that are connected in sequence. One end of the air metering valve 13 away from the air check valve 12 communicates with the air inlet of the mixing chamber 3; it can be understood that the air metering valve 13 can control the air flow rate input from the air circuit 1 into the mixing chamber 3, and the air check valve 12 can prevent the air in the air circuit 1 from flowing back.

[0029] The oxygen circuit 2 includes an oxygen interface 21, an oxygen check valve 22, and an oxygen metering valve 23 that are connected in sequence. One end of the oxygen metering valve 23 away from the oxygen check valve 22 communicates with the oxygen inlet of the mixing chamber 3. It can be understood that the oxygen metering valve 23 can control the oxygen flow rate input from the oxygen circuit 2 into the mixing chamber 3, and the oxygen check valve 22 can prevent the oxygen in the oxygen circuit 2 from flowing back.

[0030] In this embodiment, the design of the air metering valve 13 and the oxygen metering valve 23 ensures the air volume and oxygen volume input into the mixing chamber 3.

[0031] In one embodiment, as Figure 1 shown, the air circuit 1 further includes an air pressure regulating valve 14, and the oxygen circuit 2 further includes an oxygen pressure regulating valve 24; the gas circuit system further includes an atomizer mixing valve 101 and an atomizer interface 102;

[0032] The inlet of the air pressure regulating valve 14 is connected to the air circuit 1 between the air check valve 12 and the air metering valve 13, and the inlet of the oxygen pressure regulating valve 24 is connected to the air circuit 1 between the oxygen check valve 22 and the oxygen metering valve 23. Understandably, the air pressure regulating valve 14 can regulate the air pressure in the air circuit 1, and the oxygen pressure regulating valve 24 can regulate the oxygen pressure in the oxygen circuit 2.

[0033] The outlet of the air pressure regulating valve 14 is connected to the first inlet of the atomizer mixing valve 101, the outlet of the oxygen pressure regulating valve 24 is connected to the second inlet of the atomizer mixing valve 101, and the outlet of the atomizer mixing valve 101 is connected to the atomizer interface 102. Preferably, the gas circuit system further includes a switching valve 103. The outlet through hole of the atomizer mixing valve 101 is connected to the atomizer interface 102 through the switching valve 103, and the switching valve 103 is used to control the on-off between the outlet of the atomizer mixing valve 101 and the atomizer interface 102. Understandably, the atomizer mixing valve 101 can control the air frequency input from the air circuit 1 to the atomizer interface 102, and can also control the oxygen frequency input from the oxygen circuit 2 to the atomizer interface 102. Thus, the atomizer interface 102 can intermittently input oxygen and / or air into the atomizer, so as to atomize the medicine in the atomizer and output it to the patient end.

[0034] In one embodiment, as Figure 1 shown, the inhalation circuit 4 includes a mixed gas metering valve 41, a flow regulating valve 42, a flow sensor (not shown in the figure), an oxygen concentration sensor 43, and an inhalation interface 44 connected in sequence; one end of the inhalation calibration valve 7 away from the inhalation pressure sensor 6 is connected to the inhalation circuit 4 between the mixed gas metering valve 41 and the flow regulating valve 42. Understandably, the mixed gas metering valve 41 can quantitatively output the air-oxygen mixed gas in the inhalation circuit 4 to the patient end, the flow regulating valve 42 can regulate the flow of the air-oxygen mixed gas input from the inhalation circuit 4 to the patient end, the flow sensor can real-time detect the flow of the air-oxygen mixed gas in the inhalation circuit 4, and the oxygen concentration sensor 43 can real-time detect the oxygen concentration of the air-oxygen mixed gas output from the inhalation circuit 4 to the patient end.

[0035] In one embodiment, as Figure 1As shown, the gas path system includes a safety valve 104. The inlet of the safety valve 104 is connected to the suction circuit 4 between the mixed gas metering valve 41 and the flow regulating valve 42. The outlet of the safety valve 104 is connected to the atmosphere, and the safety valve 104 is used to control the on / off between the atmosphere and the suction circuit 4. It can be understood that when the air circuit 1 and / or the oxygen circuit 2 is blocked, the safety valve 104 will open, so that the suction circuit 4 is connected to the atmosphere, so that the patient can inhale the atmosphere through the suction circuit 4 and the safety valve 104, avoiding the accident of suffocation when the pipeline before the flow regulating valve 42 is blocked, and ensuring the safety of the gas path system.

[0036] In one embodiment, as Figure 1 shown, the exhalation circuit 5 includes an exhalation interface 51, a carbon dioxide concentration sensor 52, an exhalation check valve 53, and an exhalation flow sensor 54 connected in sequence. One end of the exhalation calibration valve 9 far from the exhalation pressure sensor 8 is connected to the exhalation circuit 5 between the carbon dioxide concentration sensor 52 and the exhalation check valve 53. It can be understood that the carbon dioxide concentration sensor 52 can detect the concentration of carbon dioxide in the patient's exhaled gas in real time. The exhalation check valve 53 can prevent the atmosphere from flowing back into the exhalation circuit 5, and the exhalation flow sensor 54 can detect the flow rate of the patient's exhaled gas in real time.

[0037] It should be noted that the gas path system in this application may also include various filters, temperature sensors, etc., which will not be elaborated here. And various valve bodies, sensors, etc. in this application are all conventional components in the art. This application only designs the principle of the gas path system and does not need to elaborate on the specific structure of the valve body, sensor, etc.

[0038] Another embodiment of the present invention also provides a ventilator, including the above gas path system.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas circuit system, characterized in that: It includes an air circuit, an oxygen circuit, a mixing chamber, an inhalation circuit and an exhalation circuit; the air circuit is connected to the air inlet of the mixing chamber, and the oxygen circuit is connected to the oxygen inlet of the mixing chamber; The air circuit system further includes an inspiratory pressure sensor, an inspiratory calibration valve, an expiratory pressure sensor and an expiratory calibration valve; the inspiratory pressure sensor is connected to the inspiratory circuit through the inspiratory calibration valve, and the inspiratory calibration valve is used to connect the inspiratory pressure sensor to the inspiratory circuit or the atmosphere; The exhalation pressure sensor is connected to the exhalation circuit through the exhalation calibration valve, and the exhalation calibration valve is used to connect the exhalation pressure sensor to the exhalation circuit or the atmosphere.

2. The gas circuit system according to claim 1, characterized in that: The air circuit comprises an air interface, an air check valve and an air metering valve which are connected in sequence, and an end of the air metering valve away from the air check valve is connected to the air inlet of the mixing chamber; The oxygen circuit comprises an oxygen interface, an oxygen check valve and an oxygen quantitative valve which are connected in sequence, and one end of the oxygen quantitative valve away from the oxygen check valve is connected to the oxygen inlet of the mixing chamber.

3. The gas circuit system according to claim 2, characterized in that: The air circuit also includes an air pressure regulating valve, and the oxygen circuit also includes an oxygen pressure regulating valve; the gas circuit system also includes an atomizer mixing valve and an atomizer interface; The inlet of the air pressure regulating valve is connected to the air circuit between the air check valve and the air metering valve, and the inlet of the oxygen pressure regulating valve is connected to the air circuit between the oxygen check valve and the oxygen metering valve; The outlet of the air pressure regulating valve is connected to the first inlet of the nebulizer mixing valve, the outlet of the oxygen pressure regulating valve is connected to the second inlet of the nebulizer mixing valve, and the outlet of the nebulizer mixing valve is connected to the nebulizer interface.

4. The gas circuit system according to claim 3, characterized in that: The gas circuit system further comprises a switch valve, the outlet through hole of the atomizer mixing valve is connected to the atomizer interface by the switch valve, and the switch valve is used to control the connection and disconnection between the outlet of the atomizer mixing valve and the atomizer interface.

5. The gas circuit system according to claim 1, characterized in that: The inhalation circuit comprises a mixed gas quantitative valve, a flow regulating valve, a flow sensor, an oxygen concentration sensor and an inhalation interface which are connected in sequence; the end of the inhalation calibration valve away from the inhalation pressure sensor is connected to the inhalation circuit between the mixed gas quantitative valve and the flow regulating valve.

6. The gas circuit system according to claim 5, characterized in that: The gas circuit system includes a safety valve, the inlet of the safety valve is connected to the air intake circuit between the mixed gas quantitative valve and the flow regulating valve, the outlet of the safety valve is connected to the atmosphere, and the safety valve is used to control the connection and disconnection between the atmosphere and the air intake circuit.

7. The gas circuit system according to claim 1, characterized in that: The exhalation circuit includes an exhalation interface, a carbon dioxide concentration sensor, an exhalation check valve and an exhalation flow sensor which are connected in sequence, and one end of the exhalation calibration valve away from the exhalation pressure sensor is connected to the exhalation circuit between the carbon dioxide concentration sensor and the exhalation check valve.

8. A ventilator, characterized in that: Comprising the gas circuit system as described in any one of claims 1 to 7.

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