A device for preventing condensation water backflow in ventilator pipelines

Abstract

The present invention belongs to the field of medical equipment technology, and specifically provides a device for preventing condensed water from flowing back in a ventilator pipeline, comprising an internal circulation pressure precipitation cylinder, a multi-stage water-blocking cylinder, a breathing adapter and an air supply adapter. The multi-stage water-blocking cylinder is fixedly connected to the lower end of the internal circulation pressure precipitation cylinder, the breathing adapter is arranged on the upper edge of the side wall of the internal circulation pressure precipitation cylinder, and the air supply adapter is arranged on the lower edge of the side wall of the internal circulation pressure precipitation cylinder. The present invention utilizes an air flow channel with micro-slits to assist the patient in breathing, and achieves efficient precipitation and collection of condensed water by means of the tension effect of water and the auxiliary effect of air pressure difference. The condensed water is recovered in two stages by utilizing air pressure changes. Under the premise of ensuring efficient collection of condensed water, the possibility of reflux of the collected condensed water is effectively avoided, and the problems of low efficiency, untimely collection and easy accident caused by equipment tipping in the existing technology for collecting condensed water in ventilator pipelines are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a device for preventing condensed water from flowing back through a ventilator pipeline. Background Art

[0002] As a medical device that can artificially replace the spontaneous ventilation function, the ventilator has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support therapy and emergency resuscitation, and occupies a very important position in the field of modern medicine.

[0003] During the use of the ventilator, the gas exhaled by the patient and the gas pressed into the patient's body by the equipment cause the inside of the pipe to heat up, and the temperatures of the inner and outer walls of the pipe are different, thereby forming condensation water inside the pipe. After the condensation water accumulates, it is very easy to flow back along the inner wall of the pipe into the patient's body, causing harm to the patient's health. The existing technology often adds a condensation collection bottle or filter device at the lower part of the pipe to intercept the condensation water, and uses gravity to make the condensation water flow naturally to the collection bottle. This method cannot effectively prevent the condensation water from entering the patient's body with the airflow, and it is difficult to intercept the condensation water of the patient's inhaled and exhaled airflow in both directions. At the same time, the existing technology is prone to cause condensation water to flow back due to the shaking and fluctuation of the pipe, and even cause the collection bottle to flip over, and the anti-backflow effect is poor.

[0004] The existing technology lacks a device that can effectively reduce the amount of condensed water formed in the ventilator pipeline, actively absorb the condensed water, and intercept it in multiple ways to effectively prevent the condensed water from flowing back into the patient's body. Summary of the Invention

[0005] The present invention overcomes the shortcomings of the existing technology and provides a ventilator pipeline anti-condensation water backflow device, which utilizes an air flow channel with micro-slits to assist the patient in breathing, and achieves efficient precipitation and collection of condensation water with the help of the tension effect of water and the auxiliary effect of air pressure difference. By setting a multi-stage water-blocking cylinder, the air pressure change is utilized to realize the alternating closure of the one-way water guide plate and the air pressure sealing component, so that the condensation water can be recovered in two stages. Under the premise of ensuring the efficient collection of condensation water, the possibility of the collected condensation water backflow is effectively avoided, and the problems of low efficiency and untimely collection of condensation water in ventilator pipelines and the easy occurrence of accidents due to equipment tipping over in the existing technology are effectively solved.

[0006] The technical solution adopted by the present invention is as follows: This solution provides a ventilator pipeline anti-condensation water backflow device, including an internal circulation pressure precipitation cylinder, a multi-stage water blocking cylinder, a breathing docking device and an air supply docking tube, the multi-stage water blocking cylinder is fixedly connected to the lower end of the internal circulation pressure precipitation cylinder, the breathing docking device is passed through the upper edge of the side wall of the internal circulation pressure precipitation cylinder, the air supply docking tube is passed through the lower edge of the side wall of the internal circulation pressure precipitation cylinder, a spiral water separation pipe is fixed inside the internal circulation pressure precipitation cylinder, an internal circulation device is fixed on the inner wall of the internal circulation pressure precipitation cylinder, and the inner wall of the multi-stage water blocking cylinder is fixedly distributed in an array from top to bottom. A one-way water guide plate is provided, and an air pressure sealing assembly is provided at the lower end of the inner wall of the multi-stage water blocking cylinder. A positive pressure intake pipe and a negative pressure exhalation pipe are provided on the inner wall of the breathing docking device. The ends of the positive pressure intake pipe and the negative pressure exhalation pipe close to the inner circulation pressure precipitation cylinder are respectively connected with the upper end of the spiral water separation pipe, and the end of the air supply docking pipe close to the inner circulation pressure precipitation cylinder is connected with the lower end of the spiral water separation pipe. The upper end of the inner circulation device is connected with the middle of the spiral water separation pipe, and the lower end of the inner circulation device passes through the one-way water guide plate and is arranged between the one-way water guide plate and the air pressure sealing assembly. The lower end of the multi-stage water blocking cylinder is sealed and clamped with a replaceable water collecting bottle.

[0007] Preferably, the spiral water separation tube, negative pressure exhalation tube and air supply connecting tube side walls are respectively provided with water separation micro-slits distributed in an array, and the water separation micro-slits use the surface tension of water to provide a leakage channel for condensed water, so that the condensed water on the inner wall of the spiral water separation tube, negative pressure exhalation tube and air supply connecting tube is automatically precipitated.

[0008] As a further optimization of this solution, a conical guide surface is provided on the upper wall of the one-way water guide plate, positioning feet are fixedly provided along the side of the one-way water guide plate in a ring array, a water guide groove belt is provided between adjacent positioning feet, and a rubber water stop ring is fixed on the edge of the lower wall of the one-way water guide plate. Under normal pressure environment, the outer edge of the rubber water stop ring is tightly attached to the inner wall of the multi-stage water blocking cylinder. When the area below the one-way water guide plate is in a negative pressure state, the rubber water stop ring shrinks due to the pressure difference, thereby allowing the water guide groove belt to pass through.

[0009] As a further preferred embodiment of this scheme, the pneumatic sealing assembly includes an annular sealing block, a closing ball and a supporting baffle rod, the annular sealing block and the supporting baffle rod are respectively fixed on the inner wall of the multi-stage water blocking cylinder, the supporting baffle rod is arranged below the annular sealing block, the closing ball is arranged between the annular sealing block and the supporting baffle rod, the circumferential outer wall of the annular sealing block and the inner wall of the multi-stage water blocking cylinder are tightly connected, a water collection hole is penetrated by the annular sealing block, the upper edge of the water collection hole is provided with an inverted cone annular surface, the lower edge of the water collection hole is provided with a conical sealing surface, and the diameter of the closing ball is between the minimum aperture and the maximum aperture of the water collection hole.

[0010] Furthermore, the internal circulation device includes an internal circulation pump, an internal circulation gas collecting pipe and an internal circulation exhaust pipe, and the internal circulation pump, the internal circulation gas collecting pipe and the internal circulation exhaust pipe are respectively fixed on the inner side wall of the internal circulation pressure precipitation cylinder, the upper end of the internal circulation gas collecting pipe and the input end of the internal circulation pump are through-connected, the lower end of the internal circulation gas collecting pipe is sequentially arranged through the middle of the one-way water guide plate, the lower end of the internal circulation gas collecting pipe is arranged between the lowest one-way water guide plate and the annular closing block, the lower end of the internal circulation exhaust pipe and the output end of the internal circulation pump are through-connected, and the upper end of the internal circulation exhaust pipe and the middle of the spiral water separation pipe are through-connected.

[0011] Furthermore, the end of the breathing adapter close to the internal circulation pressure precipitation cylinder is connected to the side wall of the internal circulation pressure precipitation cylinder, and the end of the breathing adapter away from the internal circulation pressure precipitation cylinder is fixedly provided with a breathing connecting valve, and the ends of the positive pressure inspiration pipe and the negative pressure exhalation pipe close to the breathing connecting valve are respectively fixedly connected to the breathing connecting valve.

[0012] Preferably, an extended one-way valve is fixedly provided at the end of the positive pressure inhalation tube near the breathing connecting valve, an extended pipe section is provided in the middle of the extended one-way valve, the end of the extended one-way valve with a larger inner diameter is connected to the breathing connecting valve, an inhalation stop bar is fixedly provided at the end of the extended one-way valve near the breathing connecting valve, an exhalation stop ball is provided inside the extended one-way valve, and the diameter of the exhalation stop ball is between the minimum inner diameter and the maximum inner diameter of the extended pipe section.

[0013] Preferably, a contraction one-way valve is fixedly provided at the end of the negative pressure exhalation tube close to the breathing connecting valve, a contraction pipe section is provided in the middle of the contraction one-way valve, the end of the contraction one-way valve with a smaller inner diameter is connected to the breathing connecting valve, an exhalation stop bar is fixed at the end of the contraction one-way valve away from the breathing connecting valve, an inspiration stop ball is provided inside the contraction one-way valve, and the diameter of the inspiration stop ball is between the minimum inner diameter and the maximum inner diameter of the contraction pipe section.

[0014] Furthermore, a distal guide tube is sleeved on the outer wall of the gas supply docking tube, and the end of the distal guide tube close to the inner circulation pressure precipitation tube is connected to the side wall of the inner circulation pressure precipitation tube, and the end of the distal guide tube away from the inner circulation pressure precipitation tube is fixedly and sealedly connected to the outer wall of the gas supply docking tube.

[0015] Furthermore, a filter screen is fixedly provided at the lower end of the internal circulation air collecting pipe.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] (1) The equipment uses an internal circulation pressure precipitation cylinder, a breathing adapter and an air supply butt joint to form an air flow channel with micro-slits. With the help of the tension of water and the auxiliary effect of air pressure difference, it realizes the efficient precipitation and collection of condensed water, effectively solving the problem of low efficiency and untimely collection of condensed water in the ventilator pipeline in the existing technology;

[0018] (2) The multi-stage water-blocking cylinder uses air pressure changes to achieve alternating closure of the one-way water guide plate and the air pressure sealing component, so that the condensed water can be recovered in two stages. While ensuring the efficient collection of the condensed water, the possibility of the collected condensed water flowing back is effectively avoided;

[0019] (3) The water separation micro-slits set in the spiral water separation tube, negative pressure exhalation tube and air supply connecting tube use the surface tension of water to produce an automatic penetration effect, which can efficiently separate out the condensed water generated in the air flow channel;

[0020] (4) The internal circulation pressure precipitation cylinder forms an enclosed space outside the spiral water separation tube, the breathing adapter forms an enclosed space outside the negative pressure exhalation tube, and the distal guide tube forms an enclosed space outside the air supply connection tube. The entire air flow channel is wrapped by the outside, thereby forming a high-pressure area and a low-pressure area inside the device. The air flow channel is a high-pressure area, and the air flow channel is a low-pressure area. Condensed water can quickly seep out through the water separation micro-slits;

[0021] (5) The breathing adapter, distal guide tube and internal circulation pressure precipitation cylinder provide an outer layer of thermal insulation protection for the airflow channel while providing air pressure difference, which can significantly reduce the amount of condensed water generated and ensure the safety of the airflow channel;

[0022] (6) The internal circulation device forms a directional circulating airflow inside the device, which does not affect the total air pressure generated by the ventilator, and can quickly precipitate condensed water from the patient's respiratory airflow duct and follow the circulating airflow inside the device to be collected in the multi-stage water-blocking cylinder;

[0023] (7) When the internal circulation device is in operation, the one-way water guide plate is opened, the air pressure sealing component is sealed, and the condensed water is temporarily stored above the air pressure sealing component. The condensed water inside the replaceable water collection bottle will not flow back into the internal circulation device due to the air flow. When the internal circulation device stops operating, the one-way water guide plate is closed and receives the condensed water subsequently recovered by the equipment. The air pressure sealing component is opened and the previous condensed water enters the replaceable water collection bottle. The condensed water is intercepted twice by the one-way water guide plate and the air pressure sealing component to achieve safe recovery;

[0024] (8) The positive pressure inhalation tube and the negative pressure expiratory tube realize cross one-way ventilation through the expansion one-way valve and the contraction one-way valve. The gas exhaled by the patient enters the negative pressure expiratory tube. When the patient inhales, the condensed water formed in the negative pressure expiratory tube will be blocked by the contraction one-way valve, thereby effectively preventing the possibility of condensed water generated by the patient's exhalation from flowing back. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a ventilator pipeline anti-condensation water backflow device proposed by the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of a device for preventing condensed water backflow in a ventilator pipeline proposed by the present invention;

[0027] Figure 3 A top cross-sectional view of the breathing adapter provided by the present invention;

[0028] Figure 4 A top cross-sectional view of the air supply butt joint provided by the present invention;

[0029] Figure 5 for Figure 3 A partial enlarged view of part A;

[0030] Figure 6 This is a schematic structural diagram of the one-way water guide plate proposed in the present invention;

[0031] Figure 7 This is a schematic diagram of the half-section structure of the one-way water guide plate proposed in the present invention;

[0032] Figure 8 This is a schematic diagram of a half-section structure of the air pressure sealing assembly proposed by the present invention;

[0033] Figure 9 A side cross-sectional view of the air pressure sealing assembly proposed by the present invention;

[0034] Figure 10 This is a side sectional view of the multi-stage water blocking cylinder proposed by the present invention.

[0035] Among them, 1. Internal circulation pressure precipitation cylinder, 11. Spiral water separation pipe, 12. Internal circulation device, 121. Internal circulation pump, 122. Internal circulation gas collection pipe, 1221. Filter screen, 123. Internal circulation exhaust pipe, 2. Multi-stage water blocking cylinder, 21. One-way water guide plate, 211. Conical guide surface, 212. Positioning foot, 2121. Water guide groove belt, 213. Rubber water stop ring, 22. Air pressure sealing component, 221. Ring sealing block, 2211. Water collection hole, 2212. Inverted cone ring surface, 2213. Cone shaped sealing surface, 222, closing ball, 223, supporting baffle, 23, replaceable water collection bottle, 3, breathing docking device, 31, positive pressure inhalation tube, 311, extension one-way valve, 3111, extension pipe section, 3112, inhalation baffle, 3113, exhalation baffle ball, 32, negative pressure inhalation tube, 321, contraction one-way valve, 3211, contraction pipe section, 3212, exhalation baffle, 3213, inhalation baffle ball, 33, breathing connecting valve, 4, air supply docking tube, 41, water separation micro-slit, 42, distal guide tube.

[0036] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 3 In this embodiment, a ventilator pipeline anti-condensation water backflow device comprises an internal circulation pressure precipitation cylinder 1, a multi-stage water blocking cylinder 2, a breathing docking device 3 and an air supply docking pipe 4. The multi-stage water blocking cylinder 2 is fixedly connected to the lower end of the internal circulation pressure precipitation cylinder 1, the breathing docking device 3 is arranged through the upper edge of the side wall of the internal circulation pressure precipitation cylinder 1, and the air supply docking pipe 4 is arranged through the lower edge of the side wall of the internal circulation pressure precipitation cylinder 1. A spiral water separation pipe 11 is fixedly provided inside the internal circulation pressure precipitation cylinder 1, and an internal circulation device 12 is fixedly provided on the inner wall of the internal circulation pressure precipitation cylinder 1. A one-way water guide plate 21 is fixedly provided on the inner wall of the multi-stage water blocking cylinder 2 from top to bottom. An air pressure sealing assembly 22 is provided at the lower end of the inner wall. A positive pressure inhalation tube 31 and a negative pressure exhalation tube 32 are provided on the inner wall of the breathing adapter 3. The ends of the positive pressure inhalation tube 31 and the negative pressure exhalation tube 32 near the inner circulation pressure separation cylinder 1 are respectively connected to the upper ends of the spiral water separation tube 11. The end of the air supply docking tube 4 near the inner circulation pressure separation cylinder 1 is connected to the lower end of the spiral water separation tube 11. The upper end of the inner circulation device 12 is connected to the middle part of the spiral water separation tube 11. The lower end of the inner circulation device 12 passes through the one-way water guide plate 21 and is arranged between the one-way water guide plate 21 and the air pressure sealing assembly 22. A replaceable water collection bottle 23 is provided at the lower end of the multi-stage water blocking cylinder 2 in a spiral sealing connection.

[0039] like Figure 1-Figure 5 As shown, the spiral water separation tube 11, the negative pressure exhalation tube 32 and the side walls of the air supply connecting tube 4 are respectively distributed in an array and penetrated with water separation micro-slits 41.

[0040] like Figure 2 、 Figure 6 and Figure 7 As shown, a conical guide surface 211 is provided on the upper wall of the one-way water guide plate 21, positioning feet 212 are fixedly provided along the side of the one-way water guide plate 21 in a ring array, a water guide groove belt 2121 is provided between adjacent positioning feet 212, and a rubber water stop ring 213 is fixedly provided on the edge of the lower wall of the one-way water guide plate 21.

[0041] like Figure 1 、 Figure 2 、 Figure 8 and Figure 9 As shown, the pneumatic sealing assembly 22 includes an annular sealing block 221, a sealing ball 222 and a supporting baffle 223. The annular sealing block 221 and the supporting baffle 223 are respectively fixed to the inner wall of the multi-stage water-blocking cylinder 2, the supporting baffle 223 is arranged below the annular sealing block 221, and the sealing ball 222 is arranged between the annular sealing block 221 and the supporting baffle 223. The circumferential outer wall of the annular sealing block 221 is tightly connected to the inner wall of the multi-stage water-blocking cylinder 2. A water collecting hole 2211 is penetrated by the annular sealing block 221. The upper edge of the water collecting hole 2211 is provided with an inverted conical annular surface 2212, and the lower edge of the water collecting hole 2211 is provided with a conical sealing surface 2213. The diameter of the sealing ball 222 is between the minimum aperture and the maximum aperture of the water collecting hole 2211.

[0042] like Figures 1-8 As shown, the internal circulation device 12 includes an internal circulation pump 121, an internal circulation gas collecting pipe 122 and an internal circulation exhaust pipe 123. The internal circulation pump 121, the internal circulation gas collecting pipe 122 and the internal circulation exhaust pipe 123 are respectively fixed on the inner wall of the internal circulation pressure precipitation cylinder 1, and the upper end of the internal circulation gas collecting pipe 122 is connected with the input end of the internal circulation pump 121, and the lower end of the internal circulation gas collecting pipe 122 is arranged through the middle of the one-way water guide plate 21 in sequence. The lower end of the internal circulation gas collecting pipe 122 is arranged between the lowest one-way water guide plate 21 and the annular closing block 221, the lower end of the internal circulation exhaust pipe 123 is connected with the output end of the internal circulation pump 121, and the upper end of the internal circulation exhaust pipe 123 is connected with the middle of the spiral water separation pipe 11.

[0043] like Figure 1-Figure 3 As shown, the end of the breathing docking device 3 close to the internal circulation pressure precipitation cylinder 1 is connected to the side wall of the internal circulation pressure precipitation cylinder 1, and the end of the breathing docking device 3 away from the internal circulation pressure precipitation cylinder 1 is fixedly provided with a breathing connecting valve 33, and the ends of the positive pressure intake pipe 31 and the negative pressure exhalation pipe 32 close to the breathing connecting valve 33 are respectively fixedly connected to the breathing connecting valve 33.

[0044] like Figure 3 、 Figure 5 As shown, an extended one-way valve 311 is fixedly provided at the end of the positive pressure inspiration pipe 31 near the breathing connecting valve 33, an extended pipe section 3111 is provided in the middle of the extended one-way valve 311, the end of the extended one-way valve 311 with a larger inner diameter is connected to the breathing connecting valve 33, an inspiration baffle 3112 is fixedly provided at the end of the extended one-way valve 311 near the breathing connecting valve 33, an exhalation baffle ball 3113 is provided inside the extended one-way valve 311, and the diameter of the exhalation baffle ball 3113 is between the minimum inner diameter and the maximum inner diameter of the extended pipe section 3111.

[0045] like Figure 3 、 Figure 5As shown, a contraction one-way valve 321 is fixedly provided at the end of the negative pressure exhalation tube 32 close to the breathing connecting valve 33, a contraction pipe section 3211 is provided in the middle of the contraction one-way valve 321, the end of the contraction one-way valve 321 with a smaller inner diameter is connected to the breathing connecting valve 33, an exhalation baffle 3212 is fixedly provided at the end of the contraction one-way valve 321 away from the breathing connecting valve 33, and an inhalation baffle ball 3213 is provided inside the contraction one-way valve 321, and the diameter of the inhalation baffle ball 3213 is between the minimum inner diameter and the maximum inner diameter of the contraction pipe section 3211.

[0046] like Figure 1 、 Figure 4 As shown, a distal guide tube 42 is sleeved on the outer wall of the gas supply docking tube 4, and the distal guide tube 42 is connected to the end of the internal circulation pressure precipitation tube 1 and the side wall of the internal circulation pressure precipitation tube 1, and the distal guide tube 42 is fixedly and sealedly connected to the end of the internal circulation pressure precipitation tube 1 and the outer wall of the gas supply docking tube 4.

[0047] like Figure 10 As shown, a filter screen 1221 is fixedly provided at the lower end of the internal circulation air collecting pipe 122 .

[0048] During specific use of this embodiment, the device is connected to the ventilator via the gas supply connecting pipe 4. Medical personnel electrically connect the internal circulation pump 121 to the ventilator so that the internal circulation pump 121 runs synchronously when the ventilator delivers gas to the patient, and stops running when the ventilator assists the patient in exhaling gas. Medical personnel fix the clean, replaceable water collection bottle 23 to the lower end of the multi-stage water-blocking cylinder 2 and connect the ventilator cannula to the breathing communication valve 33, thereby connecting the cannula of the ventilator and the patient end. The internal circulation pressure precipitation cylinder 1 is then hung and fixed. In the initial state, the outer edges of the rubber water-stop rings 213 are respectively in close contact with the inner walls of the multi-stage water-blocking cylinder 2, that is, the one-way water guide plates 21 are all in a closed state.

[0049] When the ventilator outputs positive pressure gas and assists the patient to inhale, the positive pressure gas enters the spiral water analysis tube 11 through the air supply docking tube 4, and then enters the positive pressure inhalation tube 31 and the negative pressure exhalation tube 32, so that the internal air pressure of the positive pressure inhalation tube 31 and the negative pressure exhalation tube 32 increases. The inhalation baffle 3213 at the end of the negative pressure exhalation tube 32 is pushed by the air pressure and is close to the inner wall of the contraction tube section 3211, so that the contraction one-way valve 321 is in a closed state, and the interior of the negative pressure exhalation tube 32 is in a positive pressure occluded state as a whole. The exhalation baffle 3113 at the end of the positive pressure inhalation tube 31 is moved away from the expansion tube section 3111 due to the action of the airflow and is blocked by the inhalation baffle 3112. Therefore, the expansion one-way valve 311 is in a through state at this time. Therefore, the airflow at this time can only flow from the positive pressure inhalation tube 31 and enter the patient's body. During the gas flow process, the condensed water droplets generated inside the air supply docking tube 4 will slowly seep out of the air supply docking tube 4 through the water separation micro-slits 41 on the air supply docking tube 4 under the action of the water surface tension and air pressure and adhere to the inner wall of the distal guide tube 42. The condensed water droplets inside the spiral water separation tube 11 will also slowly seep out. When the ventilator assists the patient in exhaling gas, the airflow direction in the pipeline is reversed. At this time, the expansion one-way valve 311 is in a closed state due to the action of the exhalation baffle 3113, and the contraction one-way valve 321 is in a through state. That is, at this time, the patient's exhaled gas enters the spiral water separation tube 11 through the negative pressure exhalation tube 32. The condensed water droplets formed inside the negative pressure exhalation tube 32 will slowly seep out from the water separation micro-slits 41 on the negative pressure exhalation tube 32 and adhere to the inner wall of the respiratory adapter 3.

[0050] When the device assists the patient to inhale, the internal circulation pump 121 is running, and the internal circulation pump 121 drives the gas in the lower end area of ​​the internal circulation gas collecting pipe 122 to enter the internal circulation gas collecting pipe 122. The air pressure in the lower end area of ​​the internal circulation gas collecting pipe 122 drops rapidly, causing the closing ball 222 to move upward and close to the inner wall of the conical sealing surface 2213. The air pressure sealing component 22 is in a closed state, and the replaceable water collecting bottle 23 and the multi-stage water blocking cylinder 2 are isolated from each other. This setting method can prevent the condensed water inside the replaceable water collecting bottle 23 from being sucked into the spiral water separation tube 11 by the internal circulation gas collecting pipe 122, and when the device is deflected or tilted, the closing ball 222 can be in the spiral water separation tube 11 under the action of gravity and the condensed water inside the replaceable water collecting bottle 23. Under the driving force of water, the annular sealing block 221 is blocked to avoid accidents of the equipment. The internal circulation pump 121 continues to run, and the air pressure in the lower end area of ​​the internal circulation gas collecting pipe 122 continues to decrease, so that the rubber water stop ring 213 shrinks one by one, and the water guide groove belt 2121 will be in a through state, so that the gas in the internal space of the internal circulation pressure precipitation cylinder 1 flows downward, and flows to the lower end of the internal circulation gas collecting pipe 122 through the water guide groove belt 2121 along the side of each layer of the one-way water guide plate 21, and then flows into the spiral water separation pipe 11 under the drive of the internal circulation pump 121. In this process, there are two states of positive pressure and negative pressure inside the internal circulation pressure precipitation cylinder 1, the breathing docking device 3 and the distal guide pipe 42:

[0051] Inside the internal circulation pressure separation cylinder 1, the inside of the spiral water separation tube 11 is in a positive pressure state, and the outside of the spiral water separation tube 11 is in a negative pressure state;

[0052] Inside the breathing docking device 3, the inside of the positive pressure inhalation tube 31 and the negative pressure exhalation tube 32 are in a positive pressure state, and the outside of the positive pressure inhalation tube 31 and the negative pressure exhalation tube 32 are in a negative pressure state;

[0053] Inside the distal flow guide tube 42, the inside of the gas supply connecting tube 4 is in a positive pressure state, and the outside of the gas supply connecting tube 4 is in a negative pressure state;

[0054] Under the action of the airflow generated by the pressure deviation and pressure difference, the rate of condensed water seeping out of the spiral water separation tube 11, the negative pressure exhalation tube 32 and the air supply docking tube 4 through the water separation micro-slit 41 will be significantly improved. The seeped condensed water will gather and flow to the inner wall of the internal circulation pressure separation cylinder 1 with the action of the airflow and gravity, and flow into the multi-stage water blocking cylinder 2. At this time, since the water guide groove belt 2121 is in a through state, the condensed water will flow to the annular sealing block 221. Since the annular sealing block 221 is in a closed state at this time, the condensed water temporarily gathers here.

[0055] When the device assists the patient in exhaling, the internal circulation pump 121 stops running, and the gas inside the device no longer gathers towards the lower end of the internal circulation gas collecting pipe 122. The negative pressure state inside the multi-stage water blocking cylinder 2 will be converted to normal pressure. Therefore, the rubber water stop ring 213 will be close to the inner wall of the multi-stage water blocking cylinder 2 again, and the water guide groove belt 2121 is in a closed state, so that the multi-stage water blocking cylinder 2 forms multiple water retaining layers. The sealing ball 222 is separated from the conical sealing surface 2213 under the action of gravity, and the annular sealing block 221 is converted into a through state. The condensed water collected on the annular sealing block 221 flows into the replaceable water collecting bottle 23 under the action of gravity. At this time, the condensed water seeping out of the internal circulation pressure precipitation cylinder 1 will be collected above the one-way water guide plate 21. When the patient inhales next time, the water guide groove belt 2121 on the one-way water guide plate 21 is opened again, and the condensed water is temporarily stored on the annular sealing block 221 again and finally collected in the replaceable water collecting bottle 23.

[0056] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0057] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A device for preventing condensed water from flowing back through a ventilator pipeline, comprising an internal circulation pressure precipitation cylinder (1), characterized in that: The lower end of the inner circulation pressure precipitation tube (1) is fixedly connected with a multi-stage water blocking tube (2), the upper edge of the outer wall of the inner circulation pressure precipitation tube (1) is fixedly provided with a breathing docking device (3), the lower edge of the outer wall of the inner circulation pressure precipitation tube (1) is fixedly provided with an air supply docking tube (4), the inner part of the inner circulation pressure precipitation tube (1) is fixedly provided with a spiral water separation tube (11), the inner wall of the inner circulation pressure precipitation tube (1) is fixedly provided with an inner circulation device (12), the inner wall of the multi-stage water blocking tube (2) is fixedly provided with a one-way water guide plate (21) in an array from top to bottom, the lower end of the inner wall of the multi-stage water blocking tube (2) is provided with an air pressure sealing component (22), the inner wall of the breathing docking device (3 ... inner wall of the multi-stage water blocking tube (2) is fixedly provided with an air pressure sealing component (22), the inner wall of the breathing docking device (3) is fixedly provided with an air supply docking tube (4), the inner part of the inner circulation pressure precipitation tube (1) is fixedly provided with a spiral water separation tube (11), the inner wall of the inner circulation pressure precipitation tube (1) is fixedly provided with an inner circulation device (12), the inner wall of the multi-stage water blocking tube (2) is fixedly provided with a one-way water guide plate (21) in an array from top to bottom, the inner wall of the multi-stage water blocking tube (2) is fixedly provided with an one-way water guide plate (21), the inner wall of the multi-stage water blocking tube (2) is fixedly provided with an air pressure sealing component A positive pressure inhalation pipe (31) and a negative pressure exhalation pipe (32) are provided. The ends of the positive pressure inhalation pipe (31) and the negative pressure exhalation pipe (32) near the inner circulation pressure precipitation cylinder (1) are respectively connected to the upper end of the spiral water separation pipe (11). The end of the air supply butt joint pipe (4) near the inner circulation pressure precipitation cylinder (1) is connected to the lower end of the spiral water separation pipe (11). The upper end of the inner circulation device (12) is connected to the middle part of the spiral water separation pipe (11). The lower end of the inner circulation device (12) passes through the one-way water guide plate (21) and is provided between the one-way water guide plate (21) and the air pressure sealing component (22). The lower end of the multi-stage water blocking cylinder (2) is sealed and clamped with a replaceable water collecting bottle (23). The spiral water separation tube (11), the negative pressure exhalation tube (32) and the air supply butt joint tube (4) are respectively provided with water separation micro-slits (41) distributed in an array and extending through the side walls thereof; The upper wall of the one-way water guide plate (21) is provided with a conical guide surface (211); positioning feet (212) are fixedly provided along the side of the one-way water guide plate (21) in a ring-shaped array; a water guide groove belt (2121) is provided between adjacent positioning feet (212); and a rubber water stop ring (213) is fixedly provided on the edge of the lower wall of the one-way water guide plate (21); The air pressure sealing assembly (22) comprises an annular sealing block (221), a sealing ball (222) and a supporting baffle (223); the annular sealing block (221) and the supporting baffle (223) are respectively fixedly arranged on the inner wall of the multi-stage water blocking cylinder (2); the supporting baffle (223) is arranged below the annular sealing block (221); the sealing ball (222) is arranged between the annular sealing block (221) and the supporting baffle (223); the outer circumferential wall of the annular sealing block (221) is tightly connected to the inner wall of the multi-stage water blocking cylinder (2); and a water collecting hole (2211) is provided through the annular sealing block (221); The outer wall of the gas supply butt joint pipe (4) is sleeved with a distal flow guide pipe (42), and the distal flow guide pipe (42) is connected to the end close to the inner circulation pressure precipitation cylinder (1) and the side wall of the inner circulation pressure precipitation cylinder (1).

2. The device for preventing condensation water backflow in a ventilator pipeline according to claim 1, characterized in that: An inverted cone ring surface (2212) is provided on the upper edge of the water collection hole (2211), a conical blocking surface (2213) is provided on the lower edge of the water collection hole (2211), and the diameter of the closing ball (222) is between the minimum and maximum apertures of the water collection hole (2211).

3. The device for preventing condensation water backflow in a ventilator pipeline according to claim 2, characterized in that: The internal circulation device (12) includes an internal circulation pump (121), an internal circulation gas collecting pipe (122) and an internal circulation exhaust pipe (123). The internal circulation pump (121), the internal circulation gas collecting pipe (122) and the internal circulation exhaust pipe (123) are respectively fixedly arranged on the inner side wall of the internal circulation pressure precipitation cylinder (1). The upper end of the internal circulation gas collecting pipe (122) is connected to the input end of the internal circulation pump (121). The lower end of the internal circulation gas collecting pipe (122) is sequentially passed through the middle part of the one-way water guide plate (21). The lower end of the internal circulation gas collecting pipe (122) is arranged between the lowest one-way water guide plate (21) and the annular closing block (221). The lower end of the internal circulation exhaust pipe (123) is connected to the output end of the internal circulation pump (121). The upper end of the internal circulation exhaust pipe (123) is connected to the middle part of the spiral water separation pipe (11).

4. The device for preventing condensation water backflow in a ventilator pipeline according to claim 3, characterized in that: The end of the breathing adapter (3) close to the internal circulation pressure precipitation cylinder (1) is connected to the side wall of the internal circulation pressure precipitation cylinder (1), and the end of the breathing adapter (3) away from the internal circulation pressure precipitation cylinder (1) is fixedly provided with a breathing communication valve (33), and the ends of the positive pressure inhalation pipe (31) and the negative pressure exhalation pipe (32) close to the breathing communication valve (33) are respectively connected to the breathing communication valve (33) through a fixed manner.

5. The device for preventing condensation water backflow in the ventilator pipeline according to claim 4, characterized in that: An extended one-way valve (311) is fixedly provided at the end of the positive pressure inhalation pipe (31) close to the breathing connecting valve (33), an extended pipe section (3111) is provided in the middle of the extended one-way valve (311), an end of the extended one-way valve (311) with a larger inner diameter is connected to the breathing connecting valve (33), an inhalation stop bar (3112) is fixedly provided at the end of the extended one-way valve (311) close to the breathing connecting valve (33), an exhalation stop ball (3113) is provided inside the extended one-way valve (311), and the diameter of the exhalation stop ball (3113) is between the minimum inner diameter and the maximum inner diameter of the extended pipe section (3111).

6. The device for preventing condensation water backflow in the ventilator pipeline according to claim 5, characterized in that: A contraction check valve (321) is fixedly provided at the end of the negative pressure exhalation tube (32) close to the breathing communication valve (33), a contraction tube section (3211) is provided in the middle of the contraction check valve (321), an end of the contraction check valve (321) with a smaller inner diameter is connected to the breathing communication valve (33), an exhalation stop bar (3212) is fixedly provided at the end of the contraction check valve (321) away from the breathing communication valve (33), an inhalation stop ball (3213) is provided inside the contraction check valve (321), and the diameter of the inhalation stop ball (3213) is between the minimum inner diameter and the maximum inner diameter of the contraction tube section (3211).

7. The device for preventing condensation water backflow in the ventilator pipeline according to claim 6, characterized in that: The end of the distal flow guide tube (42) away from the internal circulation pressure precipitation cylinder (1) is fixedly and sealedly connected to the outer wall of the gas supply butt joint tube (4).

8. The device for preventing condensation water backflow in the ventilator pipeline according to claim 7, characterized in that: A filter screen (1221) is fixedly provided at the lower end of the internal circulation gas collecting pipe (122).

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