A breathing air path structure and breathing equipment

Abstract

The present invention belongs to the technical field of medical devices, and in particular, relates to a breathing airway structure and a breathing device. In the breathing airway structure, when the first two-position three-way valve controls the regulating channel to connect to the first channel, the high-pressure oxygen in the oxygen supply channel enters the first mounting hole through the regulating channel and the first channel in turn, and the high-pressure oxygen in the first mounting hole drives the first regulating valve to block the oxygen channel; the oxygen transported by the oxygen supply channel is input to the inlet of the venturi tube through the first proportional valve and the fourth channel in turn; after the side suction port of the venturi tube absorbs the air in the air pipe, the venturi tube outputs the air-oxygen mixed gas to the output pipe; in the present invention, the side suction principle of the venturi tube is utilized, and when the venturi tube outputs oxygen from the inlet end to the outlet end, the side suction port can automatically complete the work of absorbing air and mixing air and oxygen, so that there is no need to set a driving device such as a power pump to the air pipe, which improves the compactness of the breathing airway structure and reduces its manufacturing cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a respiratory airway structure and a respiratory device. Background Art

[0002] Respiratory equipment includes ventilators and anesthesia machines, etc.; among them, a ventilator is a medical device that can replace, control or change a person's normal physiological breathing, enhance lung ventilation, improve respiratory function, reduce respiratory work consumption, and save heart reserve capacity; anesthesia machines can deliver anesthetics into the patient's alveoli through a mechanical circuit, forming a partial pressure of anesthetic gas, which directly inhibits the central nervous system after diffusing into the blood, thereby producing the effect of general anesthesia.

[0003] In clinical medicine, ventilators generally only need to provide patients with an air-oxygen mixture. However, for some patients who need emergency treatment such as those suffering from carbon monoxide poisoning, ventilators need to provide patients with pure oxygen for treatment. Therefore, ventilators need to integrate the function of outputting air-oxygen mixture and pure oxygen.

[0004] The gas circuit structure is an important part of the ventilator. It is equipped with multiple gas channels and various valves. The through-hole valve controls the on and off of the gas channels to output different gas outputs. In the prior art, the gas circuit mechanism of the ventilator is usually a theoretical diagram, which is usually divided into several independent module designs, resulting in the gas circuit structure having the disadvantages of large size and high manufacturing cost. In addition, the gas circuit structure in the prior art is integrated with various valves, and its integration is relatively low. Summary of the invention

[0005] The present invention solves the technical problems of low integration and large volume of the air path structure in the prior art, and provides a breathing air path structure and a breathing device.

[0006] In view of the above problems, an embodiment of the present invention provides a breathing air circuit structure, comprising a first mounting block, a venturi tube, a first proportional valve, a first regulating valve, a first two-position three-way valve mounted on the first mounting block, an air pipeline and an output pipeline;

[0007] The first mounting block is provided with a plug hole, a first mounting hole, a second mounting hole, an oxygen supply channel, an oxygen channel, a regulating channel, a first channel, a second channel, a third channel and a fourth channel. The first proportional valve is plugged into the plug hole, and the venturi tube is installed in the second mounting hole. The oxygen supply channel is connected to one end of the oxygen channel through the first proportional valve, and the other end of the oxygen channel is connected to the first mounting hole. The first two-position three-way valve is connected to the regulating channel, the first channel and the second channel. The end of the regulating channel away from the first two-position three-way valve is connected to the oxygen supply channel, the end of the first channel away from the first two-position three-way valve is connected to the first mounting hole, and the end of the second channel away from the first two-position three-way valve is connected to the atmosphere. The opposite ends of the third channel are respectively connected to the first mounting hole and the outlet of the venturi tube. The first regulating valve is installed in the first mounting hole and is used to adjust the on-off between the oxygen channel and the third channel. The opposite ends of the fourth channel are respectively connected to the oxygen channel and the inlet of the venturi tube. The side suction port of the venturi tube is connected to the air duct, and the outlet of the venturi tube is connected to the output duct.

[0008] When the first two-position three-way valve controls the regulating channel to be connected to the first channel, the high-pressure oxygen in the oxygen supply channel sequentially passes through the regulating channel and the first channel into the first mounting hole, and the high-pressure oxygen in the first mounting hole drives the first regulating valve to block the oxygen channel; the oxygen transported by the oxygen supply channel is sequentially input into the inlet of the venturi tube through the first regulating valve and the fourth channel; after the side suction port of the venturi tube absorbs the air in the air pipe, the venturi tube outputs the air-oxygen mixed gas to the output pipe;

[0009] When the first two-position three-way valve controls the first channel to connect to the second channel, the first regulating valve adjusts the oxygen channel to connect to the third channel; the oxygen transported by the oxygen supply channel enters the output pipeline through the oxygen channel and the third channel in sequence.

[0010] Optionally, the first regulating valve includes a first movable body and a first elastic member, and the first movable body is installed in the first mounting hole through the first elastic member; a first blocking portion for blocking the oxygen channel is provided at one end of the first movable body, and a first annular protrusion abutting against an inner wall of the first mounting hole is provided on the side wall of the first movable body, and the first annular protrusion divides the first mounting hole into a first space and a second space distributed at intervals, the first channel is connected to the first space, and the regulating channel and the third channel are both connected to the second space.

[0011] Optionally, the respiratory airway structure further includes a second mounting block, a first one-way valve, a pressure relief valve, and a flow sensor installed in the output pipeline; the second mounting block is provided with a first through hole connected to the output pipeline, and an air inhalation interface, a pressure relief hole, and a mounting hole all connected to the first through hole;

[0012] The first one-way valve is installed in the installation hole, and is used for allowing external air to be input into the air intake interface through the first one-way valve and the first through hole in sequence when the output pipeline does not output gas;

[0013] The pressure relief valve is installed in the pressure relief hole, and is used for releasing the pressure of the high-pressure gas in the first through hole through the pressure relief valve when the gas pressure in the first through hole is greater than a preset pressure.

[0014] Optionally, the respiratory air circuit structure also includes a second mounting block and a second proportional valve and an expiratory pressure sensor both mounted on the second mounting block, the second mounting block is provided with a second through hole and a PEEP interface, the opposite ends of the second through hole are respectively connected to the regulating channel and the inlet of the second proportional valve, and the outlet of the second proportional valve is connected to the expiratory pressure sensor and the PEEP interface.

[0015] Optionally, the respiratory airway structure further includes a second two-position three-way valve and a second regulating valve both mounted on the second mounting block, and the second mounting block is further provided with a third mounting hole, a first channel, a second channel, a third channel connected to the second through hole, and a fourth channel and a fifth channel both connected to the atmosphere;

[0016] The three interfaces of the second two-position three-way valve are respectively connected to the first channel, the end of the fourth channel away from the atmosphere, and the end of the third channel away from the second through hole, and the second two-position three-way valve is used to control the first channel to connect to the third channel or the fourth channel;

[0017] One end of the first channel away from the second two-position three-way valve is connected to the third mounting hole, the third mounting hole is connected to the second channel and the fifth channel, and one end of the second channel away from the third mounting hole is connected to the PEEP interface;

[0018] The second regulating valve is installed in the third installation hole, and is used to adjust whether the second hole is connected to the fifth hole.

[0019] Optionally, the second regulating valve includes a second movable body and a second elastic member; the second movable body is installed in the third mounting hole through the second elastic member; a third blocking portion for blocking the second channel is provided at one end of the second movable body, and a second annular protrusion abutting against the inner wall of the third mounting hole is provided on the side wall of the second movable body, and the second annular protrusion divides the third mounting hole into a third space and a fourth space distributed at intervals, the third space connects the second channel and the fifth channel, and the fourth space connects the first channel.

[0020] Optionally, the second mounting block is also provided with a sixth channel connected to the second proportional valve, a seventh channel connected to the exhalation pressure sensor, and an eighth channel connected to the atmosphere, and the respiratory air path structure also includes a third two-position three-way valve installed on the second mounting block, and three interfaces of the third two-position three-way valve are respectively connected to an end of the sixth channel away from the second proportional valve, an end of the seventh channel away from the exhalation pressure sensor, and an end of the eighth channel away from the atmosphere, and the third two-position three-way valve is used to control the seventh channel to connect to the sixth channel or the eighth channel.

[0021] Optionally, the breathing air circuit structure further comprises a second one-way valve installed in the air duct, and the second one-way valve is used to control the air in the air duct to flow toward the side suction port of the venturi tube.

[0022] Optionally, the breathing air circuit structure further includes a third one-way valve and a filter installed in the output pipeline.

[0023] Another embodiment of the present invention further provides a breathing device, comprising the above-mentioned breathing airway structure.

[0024] In the present invention, the high-pressure oxygen in the first channel drives the first regulating valve to move toward the oxygen channel until the first regulating valve blocks the outlet of the oxygen channel; at this time, the oxygen in the oxygen channel enters the inlet of the venturi tube through the fourth channel, and during the flow of oxygen in the venturi tube toward its outlet, the side suction port of the venturi tube can absorb air from the air duct, so that the venturi tube can output the air-oxygen mixed gas to the output pipe. In the present invention, the side suction principle of the venturi tube is utilized, and when the venturi tube outputs oxygen from the inlet end to the outlet end, the side suction port can automatically complete the work of absorbing air and mixing air and oxygen, so that there is no need to set a driving device such as a power pump for the air duct, thereby improving the compactness of the respiratory air path structure and reducing its volume and manufacturing cost.

[0025] When the first channel is connected to the second channel, the first regulating valve is connected to the atmosphere through the first channel and the second channel, so that the first mounting hole is depressurized, and the first regulating valve will leave the outlet of the oxygen channel, so that the oxygen channel is connected to the third channel through the first mounting hole, and the position of the third channel away from the first mounting hole is connected to the position of the second mounting hole corresponding to the outlet of the venturi tube, so that the third channel directly outputs pure oxygen through the output pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 A schematic diagram of a respiratory airway structure provided by an embodiment of the present invention;

[0028] Figure 2 A schematic structural diagram of a first mounting block portion of a respiratory airway structure provided in one embodiment of the present invention;

[0029] Figure 3 A cross-sectional view of a first mounting block portion of a respiratory airway structure provided in one embodiment of the present invention;

[0030] Figure 4 A cross-sectional view of a first mounting block portion of a respiratory airway structure provided in one embodiment of the present invention;

[0031] Figure 5 A perspective view of a first mounting block of a respiratory airway structure provided in accordance with an embodiment of the present invention.

[0032] The reference numerals in the specification are as follows:

[0033] 1. First mounting block; 11. Oxygen delivery channel; 12. Oxygen channel; 13. Adjustment channel; 14. First channel; 15. Second channel; 16. Third channel; 17. Fourth channel; 18. First mounting hole; 181. First space; 182. Second space; 2. Venturi tube; 3. First proportional valve; 4. First regulating valve; 41. First moving body; 411. First blocking part; 412. First annular convex part; 42. First elastic member; 5. First two-position three-way valve; 6. Air duct; 7. Output duct; 8. Second mounting block; 81. Second through hole; 82. PEEP interface; 83. First channel; 84. Second channel; 85. Third channel; 86. Fourth channel; 87. Fifth channel; 88. Sixth channel; 89. Seventh channel; 801. Eighth channel; 802. Inhalation interface; 9. First one-way valve; 101. Pressure relief valve; 102. Flow sensor; 103. Second proportional valve; 104. Expiratory pressure sensor; 105. Second two-position three-way valve; 106. Second regulating valve; 107. Third two-position three-way valve; 108. Second one-way valve; 109. Third one-way valve; 110. Filter. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0036] like Figures 1 to 5 As shown, an embodiment of the present invention provides a breathing air circuit structure, including a first mounting block 1, a venturi tube 2, a first proportional valve 3, a first regulating valve 4, a first two-position three-way valve 5, an air duct 6 and an output duct 7 installed on the first mounting block 1; it can be understood that when the inlet of the venturi tube 2 outputs gas to the outlet, the venturi tube 2 has a large negative pressure at the position of the side suction port, so that the venturi tube 2 can absorb gas from the side suction port, and then the gas output from the outlet of the venturi tube 2 includes the gas flowing into the inlet and the gas absorbed from the side suction port; when the outlet of the venturi tube 2 inputs gas into the venturi tube 2, since the aperture of the inner hole corresponding to the side suction port is small, the gas at the outlet position of the venturi tube 2 will not be output through the side suction port and the inlet.

[0037] The first mounting block 1 is provided with a plug hole, a first mounting hole 18, a second mounting hole, an oxygen supply channel 11, an oxygen channel 12, an adjusting channel 13, a first channel 14, a second channel 15, a third channel 16 and a fourth channel 17. The first proportional valve 3 is plugged into the plug hole, and the venturi tube 2 is installed in the second mounting hole; the oxygen supply channel 11 is connected to one end of the oxygen channel 12 through the first proportional valve 3, and the other end of the oxygen channel 12 is connected to the first mounting hole 18; the first two-position three-way valve 5 is connected to the adjusting channel 13, the first channel 14 and the second channel 15; the end of the adjusting channel 13 away from the first two-position three-way valve 5 is connected to the oxygen supply channel 11; the end of the first channel 14 away from the first two-position three-way valve 5 is connected to the first mounting hole 18; the first two-position three-way valve 5 is connected to the adjusting channel 13, the first channel 14 and the second channel 15; One end of the second channel 15 away from the first two-position three-way valve 5 is connected to the atmosphere; the opposite ends of the third channel 16 are respectively connected to the first mounting hole 18 and the outlet of the venturi tube 2; the first regulating valve 4 is installed in the first mounting hole 18, and is used to adjust the on-off between the oxygen channel 12 and the third channel 16; the opposite ends of the fourth channel 17 are respectively connected to the oxygen channel 12 and the inlet of the venturi tube 2; the side suction port of the venturi tube 2 is connected to the air duct 6, and the outlet of the venturi tube 2 is connected to the output pipe 7; it can be understood that the free end of the oxygen supply channel 11 is connected to an external high-pressure oxygen device (oxygen cylinder, etc.), and the inner diameters of the oxygen channel 12 and the third channel 16 are larger than the inner diameter of the fourth channel 17, so that the oxygen in the oxygen channel 12 is preferentially output from the third channel 16.

[0038] When the first two-position three-way valve 5 controls the regulating channel 13 to connect to the first channel 14, the high-pressure oxygen in the oxygen supply channel 11 enters the first mounting hole 18 through the regulating channel 13 and the first channel 14 in turn, and the high-pressure oxygen in the first mounting hole 18 drives the first regulating valve 4 to block the oxygen channel 12; the oxygen transported by the oxygen supply channel 11 is input into the inlet of the venturi tube 2 through the first proportional valve 3 and the fourth channel 17 in turn; after the side suction port of the venturi tube 2 absorbs the air in the air pipe 6, the venturi tube 2 outputs the air-oxygen mixture to the output pipe 7; it can be understood that the first proportional valve 3 can adjust the flow rate of oxygen.

[0039] Specifically, the high-pressure oxygen in the first channel 14 drives the first regulating valve 4 to move toward the oxygen channel 12 until the first regulating valve 4 blocks the outlet of the oxygen channel 12; at this time, the oxygen in the oxygen channel 12 enters the inlet of the venturi tube 2 through the fourth channel 17, and during the flow of oxygen in the venturi tube 2 toward its outlet, the side suction port of the venturi tube 2 can absorb air from the air pipe 6, so that the venturi tube 2 can output the air-oxygen mixed gas to the output pipe 7. In the present invention, by utilizing the side suction principle of the venturi tube 2, when the venturi tube 2 outputs oxygen from the inlet end to the outlet end, the side suction port can automatically complete the work of absorbing air and mixing air and oxygen, so that there is no need to set a driving device such as a power pump for the air pipe 6, thereby improving the compactness of the breathing air path structure and reducing its volume and manufacturing cost.

[0040] When the first two-position three-way valve 5 controls the first channel 14 to connect to the second channel 15, the first regulating valve 4 regulates the oxygen channel 12 to connect to the third channel 16; the oxygen delivered by the oxygen delivery channel 11 enters the output pipeline 7 through the oxygen channel 12 and the third channel 16 in sequence. It can be understood that when the first channel 14 and the second channel 15 are connected, the first mounting hole 18 is connected to the atmosphere through the first channel 14 and the second channel 15, so that the first mounting hole 18 is depressurized, and the first regulating valve 4 will leave the outlet of the oxygen channel 12, so that the oxygen channel 12 is connected to the third channel 16 through the first mounting hole 18, and the position of the third channel 16 away from the first mounting hole 18 is connected to the position of the second mounting hole corresponding to the outlet of the venturi tube 2, so that the third channel 16 directly outputs pure oxygen through the output pipeline 7.

[0041] In one embodiment, if Figure 3As shown, the first regulating valve 4 includes a first movable body 41 and a first elastic member 42, and the first movable body 41 is installed in the first mounting hole 18 through the first elastic member 42; a first blocking portion 411 for blocking the oxygen channel 12 is provided at one end of the first movable body 41, and a first annular convex portion 412 abutting against the inner wall of the first mounting hole 18 is provided on the side wall of the first movable body 41, and the first annular convex portion 412 divides the first mounting hole 18 into a first space 181 and a second space 182 distributed at intervals, and the first channel 14 is connected to the first space 181, and the regulating channel 13 and the third channel 16 are both connected to the second space 182. It can be understood that the first annular convex portion 412 includes but is not limited to a sealing ring sleeved on the first movable body 41, and the first blocking portion 411 can be a cone provided at the front end of the first movable body 41; the first elastic member 42 includes but is not limited to a spring, etc., and the spring is sleeved on the first movable body 41, and the opposite ends of the spring abut against the first annular convex portion 412 and the inner wall of the second space 182 respectively.

[0042] Specifically, when the regulating channel 13 is connected to the first channel 14, the oxygen in the first channel 14 will enter the rear end of the first annular protrusion 412 (in the first space 181), and the oxygen input into the first mounting hole 18 by the oxygen channel 12 will enter the front end of the first annular protrusion 412 (in the second space 182), and the thrust at the rear end of the first annular protrusion 412 is greater than the thrust at the front end of the first annular protrusion 412, so that the first movable body 41 moves toward the oxygen channel 12 until the first blocking portion 411 is inserted into and blocks the oxygen channel 12, so that the oxygen in the oxygen channel 12 will not enter the first mounting hole 18, but enter the fourth channel 17.

[0043] When the first channel 14 is connected to the second channel 15, the oxygen in the first space 181 is input into the atmosphere through the first channel 14 and the second channel 15 and the pressure is released, and the elastic force of the first elastic member 42 drives the first blocking portion 411 to leave and connect the oxygen channel 12, so that the oxygen in the oxygen channel 12 is input into the third channel 16 through the second space 182.

[0044] In this embodiment, the mechanical valve of the first regulating valve 4 can complete the regulating action of the first regulating valve 4 without electricity, thereby improving its safety.

[0045] In one embodiment, if Figure 1 and Figure 2As shown, the respiratory air circuit structure also includes a second mounting block 8, a first one-way valve 9, a pressure relief valve 101 and a flow sensor 102 installed in the output pipe 7; the second mounting block 8 is provided with a first through hole connected to the output pipe 7 and an inhalation interface 802, a pressure relief hole and a mounting port all connected to the first through hole; it can be understood that the flow sensor 102 can detect the flow of the gas output by the output pipe 7 in real time, and the output pipe 7 is connected between the first mounting block 1 and the second mounting block 8; the first through hole is connected to the patient's inhalation end through the inhalation interface 802.

[0046] The first one-way valve 9 is installed in the installation port, and is used for inputting external air into the suction interface 802 through the first one-way valve 9 and the first through hole in sequence when the output pipe 7 does not output gas; specifically, when a fault occurs upstream of the output pipe 7 and the output pipe 7 does not input gas into the first through hole, the patient's inhalation causes the first channel 14 to be in a vacuum state, so that the atmosphere can enter the first through hole through the first one-way valve 9, and then the patient can inhale the atmosphere from the first through hole and the first one-way valve 9, thereby avoiding suffocation accidents of the patient.

[0047] The pressure relief valve 101 is installed in the pressure relief hole, and is used for when the gas pressure in the first through hole is greater than the preset pressure, the high-pressure gas in the first through hole is relieved through the pressure relief valve 101. It can be understood that the preset pressure can be designed according to actual needs, and the design of the pressure relief valve 101 ensures that the pressure of the gas inhaled by the patient is within the safe pressure range, further ensuring the safety of the respiratory gas circuit structure.

[0048] In one embodiment, if Figure 1 and Figure 2 As shown, the respiratory air circuit structure also includes a second mounting block 8 and a second proportional valve 103 and an expiratory pressure sensor 104 both mounted on the second mounting block 8. The second mounting block 8 is provided with a second through hole 81 and a PEEP (positive end expiratory pressure) interface 82. The opposite ends of the second through hole 81 are respectively connected to the inlet of the regulating channel 13 and the second proportional valve 103, and the outlet of the second proportional valve 103 is connected to the expiratory pressure sensor 104 and the PEEP interface 82. It can be understood that the regulating channel 13 sequentially provides a certain pressure to the patient's inspiratory end through the second through hole 81 and the PEEP interface 82, and the expiratory pressure sensor 104 can monitor the pressure value of the gas output by the PEEP interface 82 in real time. In this embodiment, the respiratory air circuit structure has a high degree of integration.

[0049] In one embodiment, if Figure 1 and Figure 2 As shown, the respiratory air circuit structure also includes a second two-position three-way valve 105 and a second regulating valve 106, both of which are installed on the second mounting block 8. The second mounting block 8 is also provided with a third mounting hole, a first channel 83, a second channel 84, a third channel 85 connected to the second through hole 81, and a fourth channel 86 and a fifth channel 87 both of which are connected to the atmosphere.

[0050] The three interfaces of the second two-position three-way valve 105 are respectively connected to the first channel 83, the end of the fourth channel 86 away from the atmosphere, and the end of the third channel 85 away from the second through hole 81, and the second two-position three-way valve 105 is used to control the first channel 83 to connect to the third channel 85 or the fourth channel 86.

[0051] One end of the first channel 83 away from the second two-position three-way valve 105 is connected to the third mounting hole, the third mounting hole is connected to the second channel 84 and the fifth channel 87, and one end of the second channel 84 away from the third mounting hole is connected to the PEEP interface 82.

[0052] The second regulating valve 106 is installed in the third mounting hole to adjust whether the second hole 84 is connected to the fifth hole 87. It can be understood that the function and structure of the second regulating valve 106 are similar to those of the first regulating valve 4, and will not be described in detail here.

[0053] Specifically, when the second two-position three-way valve 105 controls the third hole 85 to connect to the first hole 83, the high-pressure oxygen in the second through hole 81 enters the third mounting hole through the third hole 85 and the first hole 83 in turn, and the high-pressure oxygen drives the second regulating valve 106 to move and block the second hole 84 in the third mounting hole, so that the gas of the PEEP interface 82 will not be output to the atmosphere through the fifth hole 87 of the third mounting hole, and then the PEEP interface 82 outputs gas with a certain pressure. When the second two-position three-way valve 105 controls the first hole 83 to connect to the fourth hole 86, the high-pressure gas in the third mounting hole is output to the atmosphere through the first hole 83 and the fourth hole 86; at this time, the second regulating valve 106 conducts the second hole 84, and the gas output by the second proportional valve 103 to the PEEP interface 82 can be output to the atmosphere through the second hole 84, the third mounting hole and the fifth hole 87, so that the pressure value of the gas output to the patient by the PEEP interface 82 is atmospheric pressure.

[0054] It should be noted that during the patient's exhalation, a certain pressure (ie, positive end-expiratory pressure) is required in the first half of the exhalation, and the pressure in the second half of the exhalation is atmospheric pressure, thereby ensuring the smoothness of the patient's exhalation.

[0055] In one embodiment, the second regulating valve 106 includes a second moving body and a second elastic member; the second moving body is installed in the third mounting hole through the second elastic member; one end of the second moving body is provided with a third blocking portion for blocking the second hole 84, and the side wall of the second moving body is provided with a second annular protrusion abutting against the inner wall of the third mounting hole, and the second annular protrusion divides the third mounting hole into a third space and a fourth space distributed at intervals, the third space is connected to the second hole 84 and the fifth hole 87, and the fourth space is connected to the first hole 83. It can be understood that the function and structure of the second regulating valve 106 are similar to those of the first regulating valve 4, and will not be repeated here.

[0056] Specifically, when the first channel 83 inputs high-pressure oxygen into the fourth space, the second movable body moves in the third mounting hole until it is inserted into and blocks the second channel 84, so that the PEEP interface 82 will not be connected to the fifth channel 87 through the third space; when the fourth space is depressurized through the first channel 83 and the fourth channel 86 in turn, the second elastic member drives the second movable body to move and connect the second channel 84, so that the PEEP interface 82 is depressurized through the second channel 84, the third space and the fifth channel 87.

[0057] In one embodiment, if Figure 1 and Figure 2 As shown, the second mounting block 8 is also provided with a sixth hole 88 connected to the second proportional valve 103, a seventh hole 89 connected to the exhalation pressure sensor 104, and an eighth hole 801 connected to the atmosphere. The respiratory airway structure also includes a third two-position three-way valve 107 installed on the second mounting block 8. The three interfaces of the third two-position three-way valve 107 are respectively connected to one end of the sixth hole 88 away from the second proportional valve 103, one end of the seventh hole 89 away from the exhalation pressure sensor 104, and one end of the eighth hole 801 away from the atmosphere, and the third two-position three-way valve 107 is used to control the seventh hole 89 to connect to the sixth hole 88 or the eighth hole 801. It can be understood that since the sensitivity of the exhalation pressure sensor 104 is not high after working for a period of time, it is necessary to calibrate the exhalation pressure sensor 104 to ensure the accuracy of the pressure detected by the exhalation pressure sensor 104; the exhalation pressure sensor 104 needs to be connected to the atmosphere when calibrating.

[0058] Specifically, when the expiratory pressure sensor 104 monitors the positive end-expiratory pressure, the third two-position three-way valve 107 controls the seventh channel 89 to connect to the sixth channel 88, and the expiratory pressure sensor 104 detects the pressure of the PEEP interface 82 through the seventh channel 89 and the sixth channel 88 in sequence; when the expiratory pressure sensor 104 needs to be calibrated, the third two-position three-way valve 107 controls the seventh channel 89 to connect to the eighth channel 801, so that the expiratory pressure sensor 104 is connected to the atmosphere through the seventh channel 89 and the eighth channel 801.

[0059] In one embodiment, if Figure 1 and Figure 2 As shown, the breathing air path structure further includes a second one-way valve 108 installed in the air pipe 6, and the second one-way valve 108 is used to control the air in the air pipe 6 to flow to the side suction port of the venturi tube 2. It can be understood that when the venturi tube 2 inputs gas into the air pipe 6 through the side suction port, due to the one-way flowability of the second one-way valve 108, the gas in the venturi tube 2 will not be output through the air pipe 6, thereby ensuring the one-way flowability of the venturi tube 2.

[0060] In one embodiment, if Figure 1 and Figure 2 As shown, the breathing gas circuit structure also includes a third one-way valve 109 and a filter 110 installed in the output pipe 7. It can be understood that the filter 110 includes but is not limited to a filter net, etc., and the filter 110 ensures the cleanliness of the gas output by the breathing device; the third one-way valve 109 can ensure that the gas in the output pipe 7 does not flow in reverse.

[0061] Another embodiment of the present invention further provides a breathing device, comprising the above-mentioned breathing airway structure.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A breathing airway structure, characterized in that: It includes a first mounting block, a venturi tube, a first proportional valve, a first regulating valve, a first two-position three-way valve, an air pipeline and an output pipeline installed on the first mounting block; The first mounting block is provided with a plug hole, a first mounting hole, a second mounting hole, an oxygen supply channel, an oxygen channel, a regulating channel, a first channel, a second channel, a third channel and a fourth channel, the first proportional valve is plugged into the plug hole, and the venturi tube is installed in the second mounting hole; The oxygen supply channel is connected to one end of the oxygen channel through the first proportional valve, and the other end of the oxygen channel is connected to the first mounting hole. The first two-position three-way valve is connected to the regulating channel, the first channel and the second channel. The end of the regulating channel away from the first two-position three-way valve is connected to the oxygen supply channel, the end of the first channel away from the first two-position three-way valve is connected to the first mounting hole, and the end of the second channel away from the first two-position three-way valve is connected to the atmosphere; the opposite ends of the third channel are respectively connected to the first mounting hole and the outlet of the venturi tube; the first regulating valve is installed in the first mounting hole and is used to adjust the on-off between the oxygen channel and the third channel; the opposite ends of the fourth channel are respectively connected to the oxygen channel and the inlet of the venturi tube; the side suction port of the venturi tube is connected to the air duct, and the outlet of the venturi tube is connected to the output duct; The first regulating valve comprises a first movable body and a first elastic member, wherein the first movable body is installed in the first mounting hole through the first elastic member; a first blocking portion for blocking the oxygen channel is provided at one end of the first movable body, a first annular convex portion abutting against an inner wall of the first mounting hole is provided on a side wall of the first movable body, and the first annular convex portion divides the first mounting hole into a first space and a second space distributed at intervals, the first channel is connected to the first space, and the regulating channel and the third channel are both connected to the second space; When the first two-position three-way valve controls the regulating channel to be connected to the first channel, the high-pressure oxygen in the oxygen supply channel sequentially passes through the regulating channel and the first channel into the first mounting hole, and the high-pressure oxygen in the first mounting hole drives the first regulating valve to block the oxygen channel; the oxygen transported by the oxygen supply channel is sequentially input into the inlet of the venturi tube through the first proportional valve and the fourth channel; after the side suction port of the venturi tube absorbs the air in the air pipe, the venturi tube outputs the air-oxygen mixed gas to the output pipe; When the first two-position three-way valve controls the first channel to connect to the second channel, the first regulating valve adjusts the oxygen channel to connect to the third channel; the oxygen transported by the oxygen supply channel enters the output pipeline through the oxygen channel and the third channel in sequence.

2. The breathing airway structure according to claim 1, characterized in that: The respiratory air path structure also includes a second mounting block, a first one-way valve, a pressure relief valve, and a flow sensor installed in the output pipeline; the second mounting block is provided with a first through hole connected to the output pipeline, and an air inhalation interface, a pressure relief hole, and a mounting port all connected to the first through hole; The first one-way valve is installed in the installation port, and is used for allowing external air to be input into the air intake interface through the first one-way valve and the first through hole in sequence when the output pipeline does not output gas; The pressure relief valve is installed in the pressure relief hole, and is used for releasing the pressure of high-pressure gas in the first through hole through the pressure relief valve when the gas pressure in the first through hole is greater than a preset pressure.

3. The breathing airway structure according to claim 1, characterized in that: The respiratory air circuit structure also includes a second mounting block and a second proportional valve and an expiratory pressure sensor both mounted on the second mounting block. The second mounting block is provided with a second through hole and a PEEP interface. The opposite ends of the second through hole are respectively connected to the regulating channel and the inlet of the second proportional valve, and the outlet of the second proportional valve is connected to the expiratory pressure sensor and the PEEP interface.

4. The breathing airway structure according to claim 3, characterized in that: The respiratory airway structure also includes a second two-position three-way valve and a second regulating valve both mounted on the second mounting block, and the second mounting block is also provided with a third mounting hole, a first channel, a second channel, a third channel connected to the second through hole, and a fourth channel and a fifth channel both connected to the atmosphere; The three interfaces of the second two-position three-way valve are respectively connected to the first channel, the end of the fourth channel away from the atmosphere, and the end of the third channel away from the second through hole, and the second two-position three-way valve is used to control the first channel to connect to the third channel or the fourth channel; One end of the first channel away from the second two-position three-way valve is connected to the third mounting hole, the third mounting hole is connected to the second channel and the fifth channel, and one end of the second channel away from the third mounting hole is connected to the PEEP interface; The second regulating valve is installed in the third installation hole, and is used to adjust whether the second hole is connected to the fifth hole.

5. The breathing airway structure according to claim 4, characterized in that: The second regulating valve includes a second movable body and a second elastic member; the second movable body is installed in the third mounting hole through the second elastic member; a third blocking portion for blocking the second channel is provided at one end of the second movable body, and a second annular protrusion abutting against the inner wall of the third mounting hole is provided on the side wall of the second movable body, and the second annular protrusion divides the third mounting hole into a third space and a fourth space distributed at intervals, the third space connects the second channel and the fifth channel, and the fourth space connects the first channel.

6. The breathing airway structure according to claim 3, characterized in that: The second mounting block is also provided with a sixth channel connected to the second proportional valve, a seventh channel connected to the exhalation pressure sensor, and an eighth channel connected to the atmosphere. The respiratory air path structure also includes a third two-position three-way valve installed on the second mounting block. The three interfaces of the third two-position three-way valve are respectively connected to an end of the sixth channel away from the second proportional valve, an end of the seventh channel away from the exhalation pressure sensor, and an end of the eighth channel away from the atmosphere, and the third two-position three-way valve is used to control the seventh channel to connect to the sixth channel or the eighth channel.

7. The breathing airway structure according to claim 1, characterized in that: The breathing air path structure further comprises a second one-way valve installed in the air duct, and the second one-way valve is used to control the air in the air duct to flow toward the side suction port of the venturi tube.

8. The breathing airway structure according to claim 1, characterized in that: The breathing air circuit structure also includes a third one-way valve and a filter installed in the output pipeline.

9. A breathing apparatus, characterized in that Comprising the respiratory airway structure as described in any one of claims 1 to 8.

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