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CN-121987909-A - Breathing machine gas circuit system and use method

CN121987909ACN 121987909 ACN121987909 ACN 121987909ACN-121987909-A

Abstract

The invention belongs to the technical field of medical breathing support equipment, and discloses a breathing machine gas circuit system and a using method thereof, wherein the system comprises an air input channel, an oxygen input channel, an air-oxygen mixing device and a controller; one end of the air-oxygen mixing device is provided with an air mixing inlet and an oxygen mixing inlet, and the other end of the air-oxygen mixing device is connected with a mixing output pipeline; the oxygen mixing inlet is connected with a venturi tube arranged in the air-oxygen mixing device, the mixing output pipeline is connected with an anti-asphyxia valve through a pipeline, the other end of the anti-asphyxia valve is connected with a breathing interface through a pipeline, the pipeline connecting the anti-asphyxia valve and the breathing interface is connected with an anti-asphyxia exhaust port through a bypass, and the pipeline connecting the anti-asphyxia valve and the mixing output pipeline is connected with a first two-position three-way normally-closed valve through a bypass. The invention realizes the modularization and standardization of the gas path by adopting a plurality of two-position three-way normally-closed valves and the air-oxygen mixing cavity combination, remarkably simplifies the system structure and reduces the number of parts and interfaces.

Inventors

  • DONG WENBO

Assignees

  • 西安瑞新康达医疗科技有限公司

Dates

Publication Date
20260508
Application Date
20260126

Claims (10)

  1. 1. A breathing machine gas path system is characterized by comprising an air input channel (1), an oxygen input channel (3), an air-oxygen mixing device (13) and a controller, wherein an air mixing inlet (131) and an oxygen mixing inlet (132) are formed in one end of the air-oxygen mixing device (13), a mixing output pipeline (136) is connected to the other end of the air-oxygen mixing device (13), a venturi tube (133) arranged in the air-oxygen mixing device (13) is connected to the oxygen mixing inlet (132), an anti-asphyxia valve (27) is connected to the mixing output pipeline (136) through a pipeline, a breathing interface (29) is connected to the other end of the anti-asphyxia valve (27) through a pipeline, an anti-asphyxia exhaust port (28) is connected to the pipeline connected to the anti-asphyxia valve (27) through a bypass, a first two-position three-way normally-closed valve (18) is connected to the pipeline connected to the other two interfaces of the first two-position three-way normally-closed valve (18) through the pipeline, a second two-position three-way normally-closed valve (19) and a third three-way normally-closed valve (19) are connected to the other two interfaces of the first three-position three-way normally-closed valve (19) through pipelines respectively, a second three-way normally-closed valve (19) and a three-position normally-closed valve (24) are connected to the other two interfaces (24) respectively through the pipeline and an other two-position normally-closed valve (25) and an exhaust port is connected to the two monitoring port respectively, the device is characterized in that a third pressure sensor (26) is arranged in a pipeline connected with the expiration monitoring port (25), the other two interfaces of the third two-position three-way normally-closed valve (20) are respectively connected with a fourth pressure sensor (21) and an inspiration monitoring port (23) through pipelines, a fifth pressure sensor (22) is arranged in the pipeline connected with the inspiration monitoring port (23), and the anti-asphyxia valve (27), the first two-position three-way normally-closed valve (18), the second two-position three-way normally-closed valve (19) and the third two-position three-way normally-closed valve (20) are all in communication connection with the controller.
  2. 2. A ventilator air circuit system according to claim 1, wherein the air input channel (1) is connected with an air filtering device (5) through a pipeline, and the other end of the air filtering device (5) is connected with an air mixing inlet (131) of an air-oxygen mixing device (13).
  3. 3. A ventilator circuit system according to claim 1, wherein the oxygen inlet channels comprise a high pressure oxygen inlet channel (2) and a low pressure oxygen inlet channel (3), the high pressure oxygen inlet channel (2) and the low pressure oxygen inlet channel (3) being connected to the same oxygen mixing inlet (132) by means of a tee.
  4. 4. The air path system of a respirator according to claim 1, wherein a partition plate (134) is arranged in the middle of the air-oxygen mixing device (13), a through hole is formed in the partition plate (134), and a plurality of guide plates (135) fixed on the inner wall of the air-oxygen mixing device (13) are arranged on one surface of the partition plate (134) facing away from the venturi tube (133).
  5. 5. A ventilator gas circuit system according to claim 1, wherein an annular guide wall (1341) is provided on the partition (134), one end of the annular guide wall (1341) is connected to the edge of the through hole of the partition (134), and the annular guide wall (1341) is connected to one surface of the partition (134) facing the mixing output pipe (136), the diameter of one end of the annular guide wall (1341) connected to the through hole of the partition (134) is the same as the diameter of the through hole, and the other end of the annular guide wall faces the mixing output pipe (136) and has a linearly smaller diameter.
  6. 6. A ventilator circuit system according to claim 1, wherein the baffle (135) is inclined towards the baffle (134).
  7. 7. A ventilator circuit system according to claim 1, wherein a plurality of baffles (135) are arranged around the inner wall of the air-oxygen mixing device (13) to form a baffle ring, and wherein the baffles (135) are arranged with a plurality of baffle rings along the axial direction of the air-oxygen mixing device (13).
  8. 8. The air path system of the breathing machine according to claim 1, wherein the high-pressure oxygen input channel (2) is connected with a high-pressure oxygen first filtering device (4) through a pipeline, the high-pressure oxygen first filtering device (4) is connected with a high-pressure oxygen second filtering device (10) through a pipeline, a pressure reducing valve (6) and a proportional valve (9) are sequentially arranged in the pipeline connecting the high-pressure oxygen first filtering device (4) and the high-pressure oxygen second filtering device (10) along the air path input direction, and the high-pressure oxygen second filtering device (10) is connected with an oxygen mixing inlet (132) of an air-oxygen mixing device (13) through a pipeline.
  9. 9. The air path system of the breathing machine according to claim 1, wherein a second pressure sensor (8) is arranged in a pipeline between the pressure reducing valve (6) and the proportional valve (9), and a first flow sensor (12) is arranged in a pipeline connected with the high-pressure oxygen second filtering device (10) and the air-oxygen mixing device (13).
  10. 10. A method of using a ventilator circuit system as claimed in any of claims 1 to 9 comprising the steps of: When the breathing machine gas circuit system monitors the inhalation phase, the first two-position three-way normally-closed valve (18) is controlled to be communicated with the third two-position three-way normally-closed valve (20), the third two-position three-way normally-closed valve (19) is controlled to be closed, the third two-position three-way normally-closed valve (20) is controlled to be communicated with the inhalation monitoring port (23) and is closed with the fourth pressure sensor (21), and the inhalation pressure is acquired in real time through the fifth pressure sensor (22); When the breathing machine gas circuit system monitors the expiration phase, the first two-position three-way normally-closed valve (18) is controlled to be communicated with the second two-position three-way normally-closed valve (19), the second two-position three-way normally-closed valve (20) is controlled to be closed, the second two-position three-way normally-closed valve (19) is controlled to be communicated with an expiration monitoring port (25) and is closed with a calibration exhaust port (24), and the end expiratory pressure and the expiration resistance are monitored through a third pressure sensor (26); When the breathing machine gas circuit system carries out automatic zero setting calibration, the first two-position three-way normally-closed valve (18) is controlled to be communicated with the second two-position three-way normally-closed valve (19), the second two-position three-way normally-closed valve (20) is controlled to be closed, the second two-position three-way normally-closed valve (19) is controlled to be communicated with the calibration exhaust port (24) and the expiration monitoring port (25), the third pressure sensor (26) is in a zero gauge pressure state, and the controller reads the voltage output of the third pressure sensor (26) at the moment as a zero offset value; when the breathing machine gas circuit system performs leakage self-checking, the first two-position three-way normally-closed valve (18) is controlled to be communicated with the third two-position three-way normally-closed valve (20) and is closed with the second two-position three-way normally-closed valve (19), the breathing interface (29) is in a closed state, the third two-position three-way normally-closed valve (20) is controlled to be communicated with the fourth pressure sensor (21), and whether the pipeline falls off or seriously leaks is judged by monitoring the internal pressure maintaining capacity of the system through the fourth pressure sensor (21).

Description

Breathing machine gas circuit system and use method Technical Field The invention belongs to the technical field of medical breathing support equipment, and particularly relates to a breathing machine gas circuit system and a using method thereof. Background The first-aid transferring respirator gas circuit system has the problems of complex structure, redundant components, high oxygen consumption, inconvenient maintenance and low fault tolerance in the prior art. The existing first-aid or transportation respirator has complex air circuit system structure and redundant parts, so that the whole volume of the system is large, and the operation and maintenance are inconvenient. The complex structure not only increases the production and manufacturing cost, but also makes the equipment more prone to failure in actual use, requires frequent inspection and maintenance by professionals, and further increases the operation difficulty and time cost. The design of traditional gas circuit system needs a plurality of independent modules, and equipment and dismantlement process are loaded down with trivial details, have increased the operation degree of difficulty and time cost. The modularized design not only affects the overall performance and stability of the equipment, but also makes the adaptability of the equipment in different environments worse, and is difficult to rapidly cope with diversified use scene changes. The existing system has a large problem in the aspect of oxygen consumption, and influences the service time and effect of the breathing machine. Because the oxygen consumption speed exceeds the filling speed, the pressure in the oxygen storage tank is reduced, and then the normal work of the breathing machine is influenced, and the condition of interruption possibly occurs, so that the overall effect is reduced. The existing breathing machine gas circuit system lacks an effective automatic calibration mechanism, frequent manual calibration is needed, the operation burden is increased, and the reliability of the system is reduced. The manual calibration not only increases the risk of human errors, but also can lead to untimely or inaccurate calibration, thereby affecting the accuracy and safety of the breathing machine and increasing the workload of operators. The response speed and fault tolerance of the existing system under emergency conditions are low, and the diversified requirements of emergency transportation scenes are difficult to meet. In emergency situations, the slow response speed of the system may result in further exacerbation of the condition or missing the optimal treatment opportunity, while a low fault tolerance increases the risk of equipment failure, affecting the continuity and effectiveness of the emergency work. The patent application of the intelligent breathing machine air circuit system with air mixing oxygen is disclosed in China patent publication No. CN116077788A, and breathing air of a wearer can be filtered and humidified when the intelligent breathing machine air circuit system is matched with the air circuit system through the arrangement of the machine body shell, the air circuit assembly, the collecting wide pipe, the rear pipe and the front pipe. However, the patent application has shortcomings in the design of the air path assembly and the collecting wide pipe, and the service life and the reliability are required to be improved. In addition, although the system realizes humidification of air breathed by a wearer through the functional components, in actual use, the problem of inconvenient replacement and maintenance of humidifying cotton and a fixing frame can be faced, and the overall performance and user experience of the system are affected. Particularly during long-term use or high-intensity treatment, the continuous effectiveness and easy maintenance of the humidification system cannot be ensured. Disclosure of Invention In order to overcome the problems in the prior art, the invention aims to provide a breathing machine gas circuit system and a using method thereof, thereby solving the problems of complex structure, redundant components, high oxygen consumption, inconvenient maintenance and low fault tolerance of the breathing machine gas circuit system. In order to achieve the above purpose, the invention adopts the following technical scheme: A breathing machine gas path system comprises an air input channel, an oxygen input channel, an air-oxygen mixing device and a controller, wherein one end of the air-oxygen mixing device is provided with an air mixing inlet and an oxygen mixing inlet, the other end of the air-oxygen mixing device is connected with a mixing output pipeline, the oxygen mixing inlet is connected with a venturi tube arranged in the air-oxygen mixing device, the mixing output pipeline is connected with an anti-asphyxia valve through a pipeline, the other end of the anti-asphyxia valve is connected with a breathing interface through a pipeli