Pressure driven anti-backflow microporous atomization device

Abstract

The present invention relates to a pressure-driven anti-backflow microporous atomizing device, comprising an upper joint, an upper connecting pipe, a one-way valve, an articulated ball, an upper end cover, an atomizing chamber, a lower end cover, an air inlet joint, an air inlet pipe and a counterweight. The upper joint is a T-type three-way joint, comprising two horizontally connected interfaces and a vertical interface. The two horizontally connected interfaces of the upper joint are respectively connected to a ventilator and an artificial airway through pipelines. The vertical interface of the upper joint is connected to the upper connecting pipe, the upper end of the upper connecting pipe is connected to the vertical interface of the upper joint, and the lower end of the upper connecting pipe is connected to the articulated ball. A one-way valve is arranged in the upper connecting pipe. The one-way valve can prevent the backflow of condensed water generated in the pipeline, cough secretions of the patient's airway, etc., and can effectively reduce the probability of infection. The ball articulated structure cooperates with the counterweight to ensure that the atomizer is always in a vertical state when the patient's body position changes, ensure that the atomized medicine liquid is always in the lowest position of the atomizer, reduce the residual medicine liquid, and ensure the atomization effect.

Description

Technical field:

[0002] The invention belongs to the technical field of medical auxiliary equipment, and in particular relates to a pressure-driven anti-backflow microporous atomization device used for ventilator-assisted atomization treatment of patients. Background technology:

[0004] At present, in clinical practice, especially in intensive care units, ventilators are increasingly used to help patients breathe. In addition to assisting breathing, ventilators can also be used for aerosol therapy of drugs. In addition to intravenous medication, many special lung infections must be treated with local aerosol inhalation because local aerosol inhalation has a better effect in expectoration and expectoration.

[0005] At present, when nebulization treatment is performed on ventilator patients clinically, a T-type three-way joint is usually set up. One of the two horizontally connected joints of the T-type three-way joint is connected to the ventilator through a pipeline, and the other is connected to an artificial airway or a mask through a pipeline to form an inhalation loop. The other joint of the T-type three-way joint is connected to the nebulizer. After the nebulizer is injected with aerosolized medicine, the pressurized gas is used to aerosolize the medicine. The aerosolized medicine enters the inhalation loop. Using the jet principle, the oxygen in the inhalation loop carries the aerosolized medicine into the patient's lungs to perform nebulization treatment on the patient.

[0006] This type of atomization treatment method has the following problems when used clinically:

[0007] (1) Condensed water generated in the pipeline during nebulization, cough secretions from the patient's airway, etc. can easily flow back into the nebulizer, causing drug contamination and drug waste. At the same time, if the substances that flow back into the nebulizer cannot be cleaned up in time, they will form bacterial culture media, which are easy to breed bacteria and increase the risk of infection. The grown bacteria will enter the patient's respiratory tract with the next nebulization, causing ventilator-associated pneumonia (VAP) in severe cases, increasing hospitalization time, increasing the patient's financial difficulties, and increasing mortality.

[0008] (2) Patients are usually placed in a semi-sitting position for nebulization. However, mechanically ventilated patients are often placed in a supine position, a 30-degree sitting position, or a side-lying position due to their critical condition. When the patient's body position does not meet the requirements or changes, the nebulizer is easily tilted. The pressurized gas used in the existing nebulizer for nebulization usually enters from the lower end of the nebulizer. Once the nebulizer is tilted, the liquid level of the drug in the nebulizer will tilt, resulting in the inability to fully nebulize the local drug solution. Part of the drug solution will remain in the nebulizer and cannot be fully utilized, resulting in a waste of drug solution and affecting the treatment effect.

[0009] (3) In the existing atomizer, the pressure gas pipeline is connected to the lower end of the atomizer. The pressure gas enters from the lower end of the atomizer, which easily causes the pressure gas pipeline to be squeezed, affecting the pressure and flow of the gas entering the atomizer, resulting in a poor atomization effect.

[0010] (4) When a patient is given a nebulizer, in order to improve the nebulization effect, several drugs are often used for nebulization. However, the various drugs must be separated from each other and cannot be mixed together for nebulization to avoid reactions between the drugs and adverse reactions. The existing nebulizer needs to disassemble the medicine cup of the nebulizer every time the drug is added, which is cumbersome, time-consuming and labor-intensive, and also increases the chance of drug and nebulizer contamination.

[0011] (5) Nebulizers are currently commonly used in clinical practice. After atomization, the drug particles are large. Most of the atomized drug particles sink to the nasopharynx and throat and do not enter the patient's lungs. Therefore, the atomization effect is poor and the therapeutic effect cannot be achieved. Summary of the invention:

[0013] In summary, in order to overcome the shortcomings of the prior art problems, the present invention provides a pressure-driven anti-backflow microporous atomization device, which adds a one-way valve between the T-type three-way connector and the nebulizer to prevent the backflow of condensed water generated in the pipeline, the patient's airway cough secretions, etc., which can effectively reduce the chance of infection. A rotatable ball hinge structure is arranged at the upper end of the nebulizer, and dense small holes for the passage of atomizing airflow are arranged on the hinged ball of the ball hinge structure. A counterweight is arranged at the lower end of the nebulizer, so as to ensure that the nebulizer is always in a vertical state when the patient's position changes, and to ensure that the atomized medicine liquid is always in the lowest position of the nebulizer, thereby reducing the residual medicine liquid, thereby ensuring the atomization effect. The atomizing airflow enters the patient's inhalation loop after being filtered through the dense small holes on the hinged ball, and the patient is subjected to atomization treatment.

[0014] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0015] A pressure-driven anti-backflow microporous atomization device, which includes an upper joint, an upper connecting pipe, a one-way valve, an articulated ball, an upper end cover, an atomization chamber, a lower end cover, an air intake joint, an air intake pipe and a counterweight. The upper joint is a T-type three-way joint, including two horizontally connected interfaces and one vertical interface. The two horizontally connected interfaces of the upper joint are respectively connected to a ventilator and an artificial airway through pipelines. The vertical interface of the upper joint is connected to the upper connecting pipe. The upper end of the upper connecting pipe is connected to the vertical interface of the upper joint. The lower end of the upper connecting pipe is connected to the articulated ball. The upper connecting pipe is provided with a one-way valve. The articulated ball includes a ball head and a lower connecting part of an integrated structure. The lower connecting part is provided with The lower end of the ball head, the ball head is inserted into the lower end of the upper connecting tube and can rotate relative to the upper connecting tube, the upper end cover is threadedly connected to the upper end of the atomizing chamber, the upper end cover is provided with an air outlet, the lower connecting part of the hinged ball is threadedly connected to the air outlet on the upper end cover, the ball head and the lower connecting part are provided with a connecting through hole connecting the upper connecting tube and the inner cavity of the atomizing chamber, the lower end of the atomizing chamber is detachably connected to the lower end cover, the lower end cover is provided with a hollow head with a V-shaped cross-section, the lower end of the head is provided with an air inlet joint, the air inlet joint is located in the lower end cover, the air inlet joint is connected to the pressure air source through the air inlet pipe, and the lower part of the lower end cover is provided with a counterweight.

[0016] The technical solution of the present invention can also be implemented as follows: the lower end opening of the upper connecting tube is a constricted opening, the ball head of the articulated ball is clamped in the lower end opening of the upper connecting tube, and the inner diameter of the lower end opening of the upper connecting tube is smaller than the diameter of the ball head of the articulated ball.

[0017] The technical solution of the present invention can also be implemented as follows: blind holes are symmetrically arranged on both sides of the ball head of the articulated ball, and pins are symmetrically arranged in the lower end opening of the upper connecting tube, the pins correspond to the blind holes, and the pins are inserted in the blind holes, and the articulated ball rotates relative to the upper connecting tube with the pins as the rotating axis.

[0018] The technical solution of the present invention can also be implemented as follows: the connecting through holes in the ball head and the lower connecting part are a plurality of densely arranged small holes, and the aperture of the densely arranged small holes is 2 to 5 microns.

[0019] The technical solution of the present invention can also be implemented as follows: the aperture of the connecting through hole in the ball head and the lower connecting part is smaller than the inner diameter of the air outlet on the upper end cover, an upper support block is provided on the upper inner wall of the atomization chamber, the upper support block supports the lower end of the filter plate, the filter plate is pressed on the upper support block through the upper end cover, and the diameter of the filter hole on the filter plate is 2~5 microns.

[0020] The technical solution of the present invention can also be implemented as follows: a lower support block is provided on the inner wall of the lower end cover, the lower support block supports the end cap, the end cap is pressed onto the lower support block through the atomization chamber, and a lower sealing ring is provided between the end cap and the inner wall of the lower end cover.

[0021] The technical solution of the present invention can also be implemented as follows: a pipe rack is provided on the outer wall of the atomization chamber and the outer wall of the lower end cover, a through hole is provided on the side wall of the lower end cover, one end of the air inlet pipe passes through the through hole and is connected to the air inlet joint located in the lower end cover, the other end of the air inlet pipe is connected to a pressure gas source, and the pipe rack is clamped to the air inlet pipe.

[0022] The technical solution of the present invention can also be implemented as follows: a liquid inlet device is provided on the atomizing chamber, and the liquid inlet device is arranged on one side of the atomizing chamber. The liquid inlet device includes a liquid inlet pipe, a piston, a sealing ring, a spring and a spring seat. The liquid inlet pipe includes a large-diameter tube body section and a small-diameter tube mouth section. One end of the tube mouth section is used to connect the syringe, and the other end of the tube mouth section is threadedly fastened to one end of the tube body section. The other end of the tube body section is connected to the atomizing chamber and communicates with the inner cavity of the atomizing chamber. A spring seat is provided in the tube body section. The spring seat includes a seat plate and a sliding column of an integral structure. The seat plate is connected to the tube body section of the liquid inlet pipe, and the sliding column is installed in the inner cavity of the piston. The piston is a cylindrical structure with an open end and a closed end at the other end. A spring is provided between the inner bottom surface of the piston and the seat plate, and the spring is sleeved outside the sliding column. The outer diameter of the piston is greater than the outer diameter of the tube mouth section of the liquid inlet pipe. A sealing ring is provided between the closed end of the piston and the tube mouth section, and a through hole is provided on the seat plate of the spring seat.

[0023] The technical solution of the present invention can also be implemented as follows: a throttle valve is provided on the body section of the liquid inlet pipe, the throttle valve is arranged close to the atomization chamber, and a liquid storage chamber is formed between the throttle valve and the pipe mouth section 206 of the liquid inlet pipe.

[0024] The technical solution of the present invention can also be implemented as follows: an air inlet hole is provided in the air inlet joint, and the air inlet hole is a tapered hole with a small diameter at the upper end and a large diameter at the lower end.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention adds a one-way valve between the T-type three-way connector and the nebulizer to prevent the backflow of condensed water generated in the pipeline, cough secretions from the patient's airway, etc., which can effectively reduce the probability of infection. A rotatable ball hinge structure is arranged on the upper end of the nebulizer, and dense small holes for the passage of atomized airflow are arranged on the hinged ball of the ball hinge structure. A counterweight is arranged on the lower end of the nebulizer to ensure that the nebulizer is always in a vertical state when the patient's position changes, and to ensure that the atomized medicine liquid is always in the lowest position of the nebulizer, thereby reducing the residual medicine liquid, thereby ensuring the atomization effect. The atomized airflow enters the patient's inhalation loop after being filtered through the dense small holes on the hinged ball, and the patient is subjected to atomization treatment.

[0027] 2. The articulated ball of the present invention is connected to the lower end of the upper connecting tube for relative rotation, thereby realizing the relative rotation of the components below the articulated ball and the upper connecting tube. Under the action of the counterweight block in the lower end cover of the atomization chamber, the articulated ball and the components below it are kept in a vertical state, so that the atomized liquid in the atomization chamber is always at the lowest position of the atomization chamber, reducing the residual liquid and thus ensuring the atomization effect.

[0028] 3. The lower end of the atomizing chamber of the present invention is detachably connected with a lower end cover, and the sealing head and the air inlet joint of the present invention are both located inside the lower end cover. When the atomizing chamber of the present invention is located in a vertical state and the lower end of the atomizing chamber contacts a bed or other objects, the lower end cover can protect the air inlet pipe at the lower end of the atomizing chamber to avoid squeezing the air inlet pipe, thereby ensuring the pressure and flow of the pressurized gas during atomization and avoiding affecting the atomization quality due to squeezing of the air inlet pipe.

[0029] 4. The connecting through holes in the ball head and the lower connecting part of the articulated ball of the present invention are multiple densely arranged small holes, and the aperture of the densely arranged small holes is 2 to 5 microns. Then the atomized medicine produced in the atomization chamber passes through the densely arranged small holes, and the aperture of the small holes is 2 to 5 microns. Then the drug particles smaller than 2 to 5 microns can enter the patient's body to treat the patient. Small drug particles are more delicate and easy to enter the patient's lungs through the inhalation loop, which is beneficial to the absorption of the drug, thereby ensuring the atomization treatment effect. After being blocked by the filter plate, the large particles of the drug settle and fall into the inner cavity of the head again, and are atomized by the pressurized gas again, enter the patient's inhalation loop from the upper connecting tube, and then enter the patient's body to perform atomization treatment on the patient.

[0030] 5. The setting of the filter plate of the present invention can filter the atomized drug particles. Drug particles smaller than 2 to 5 microns can enter the patient's body to treat the patient. After being blocked by the filter plate, large particles of the drug settle and fall into the inner cavity of the head again, and are atomized by the pressurized gas again. The setting of the filter plate ensures that the atomized drug particles entering the patient's body are small enough. Small drug particles are more delicate and can easily enter the patient's lungs through the inhalation loop, which is beneficial to the absorption of the drug, thereby ensuring the atomization treatment effect.

[0031] 6. The upper end cover and the lower end cover at the upper end of the atomization chamber of the present invention are both detachably connected. After the upper end cover is removed, the filter plate can be cleaned or backwashed to avoid clogging of the filter plate and ensure the atomization quality. After the lower end cover is removed, the head and the inner cavity of the atomization chamber can be cleaned or flushed, thereby ensuring the cleanliness of the atomization, reducing pollution, and reducing the probability of infection.

[0032] 7. The liquid inlet device of the present invention injects liquid medicine into the liquid inlet tube through a syringe, and uses the thrust of the liquid medicine to push the piston to compress the spring, so that the liquid inlet tube opens and the liquid medicine smoothly enters the liquid inlet tube. After the liquid medicine is pushed, under the action of the spring, the piston re-seals the pipe mouth section of the liquid inlet tube to reduce the pollution entering the liquid inlet tube. The setting of the throttle valve on the liquid inlet tube can limit the flow rate of the liquid medicine entering the atomization chamber. The liquid medicine gradually enters the atomization chamber at a small flow rate, which can make the atomized drug particles finer and the atomization thorough, thereby ensuring the effect of atomization treatment.

[0033] 8. The present invention has a simple structure, is easy to use, has a low manufacturing cost, and has a wide range of applications. It can effectively solve the secondary infection, backflow of condensed water or patient cough secretions and other pollutants that occur during atomization therapy when a ventilator helps the patient breathe, thereby ensuring the effectiveness of atomization therapy. Description of the drawings:

[0035] Figure 1 It is a schematic diagram of the first structure of the present invention;

[0036] Figure 2 It is a second structural schematic diagram of the present invention;

[0037] Figure 3 It is a third structural schematic diagram of the present invention;

[0038] Figure 4 It is a schematic diagram of the fourth structure of the present invention;

[0039] Figure 5 It is a schematic structural diagram of the liquid inlet device of the present invention. Specific implementation method:

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0042] Embodiment 1

[0043] like Figure 1As shown, a pressure-driven anti-backflow microporous atomization device includes an upper joint 1, an upper connecting pipe 2, a one-way valve 3, a hinged ball 4, an upper end cover 5, an atomization chamber 6, a lower end cover 7, an air inlet joint 8, an air inlet pipe 9 and a counterweight 10. The upper joint 1 is a T-type three-way joint, including two horizontally connected interfaces and one vertical interface. The two horizontally connected interfaces of the upper joint 1 are respectively connected to a ventilator and an artificial airway or a mask through pipelines. The vertical interface of the upper joint 1 is connected to the upper connecting pipe 2, and the upper end of the upper connecting pipe 2 is connected to the upper end of the upper joint 1. Vertical interface, the lower end of the upper connecting tube 2 is connected to the articulated ball 4, a one-way valve 3 is arranged in the upper connecting tube 2, the articulated ball 4 includes a ball head 41 and a lower connecting part 42 of an integrated structure, the lower connecting part 42 is provided with the lower end of the ball head 41, the ball head 41 is inserted into the lower end of the upper connecting tube 2, and can rotate relative to the upper connecting tube 2, the lower end opening of the upper connecting tube 2 is a constricted opening, the ball head 41 of the articulated ball 4 is clamped in the lower end opening of the upper connecting tube 2, and the inner diameter of the lower end opening of the upper connecting tube 2 is smaller than the diameter of the ball head 41 of the articulated ball 4. The upper end cover 5 is threadedly connected to the upper end of the atomizing chamber 6, and an air outlet is provided on the upper end cover 5. The lower connecting portion 42 of the hinged ball 4 is threadedly connected to the air outlet on the upper end cover 5. The ball head 41 and the lower connecting portion 42 are provided with a connecting through hole 11 connecting the upper connecting pipe 2 and the inner cavity of the atomizing chamber 6. The connecting through hole 11 is a plurality of densely arranged small holes, and the aperture of the densely arranged small holes is 2 to 5 microns. The lower end of the atomizing chamber 6 is detachably connected to the lower end cover 7, and a hollow head 17 with a V-shaped cross-section is provided in the lower end cover 7. A lower supporting block 16 is provided on the inner wall of the lower end cover 7, and the lower supporting block 16 supports the head 17. The head 17 is press-fitted on the lower supporting block 16 through the atomizing chamber 6, and a lower sealing ring 20318 is provided between the head 17 and the inner wall of the lower end cover 7. The lower end of the sealing head 17 is provided with an air inlet connector 8, and an air inlet hole 21 is provided in the air inlet connector 8. The air inlet hole 21 is a tapered hole with a small diameter at the upper end and a large diameter at the lower end. The air inlet connector 8 is located in the lower end cover 7, and the air inlet connector 8 is connected to the pressure gas source through the air inlet pipe 9. A through hole is provided on the side wall of the lower end cover 7, and one end of the air inlet pipe 9 is connected to the pressure gas source through the through hole. The other end of the air inlet pipe 9 is connected to the pressure gas source. A pipe rack 19 is provided on the outer wall of the atomization chamber 6 and the outer wall of the lower end cover 7, and the pipe rack 19 is clamped with the air inlet pipe 9. A counterweight 10 is provided at the lower part of the lower end cover 7.

[0044] When in use, rotate the atomizing chamber 6, open the upper end cover 5, add the atomized medicine liquid into the atomizing chamber 6, and then tighten the atomizing chamber 6 and the upper end cover 5; or rotate the lower end cover 7 to separate the head 17 from the atomizing chamber 6, add the atomized medicine liquid into the inner cavity of the head 17, and then tighten the lower end cover 7 to the lower end of the atomizing chamber 6, connect the air inlet pipe 9 with the pressure gas source, connect the two horizontally connected interfaces of the upper joint 1 with the ventilator and the mask respectively, to form a patient's inhalation circuit, start the pressure gas source, and the pressure gas source provides pressurized gas to the atomizing chamber 6. The pressurized gas atomizes the atomized medicine liquid in the inner cavity of the head 17 of the atomizing chamber 6 into tiny atomized medicine particles. The pressurized gas carries the tiny medicine particles and flows upward, enters the upper connecting pipe 2 after passing through the densely arranged small holes in the articulated ball 4, and then enters the upper joint 1 through the one-way valve 3. Under the action of the jet principle, the tiny medicine particles entering the upper joint 1 enter the patient's body along with the patient's inhalation circuit, and the patient is subjected to atomization treatment.

[0045] When the tiny drug particles after the atomization of the atomized drug liquid pass through the densely arranged small holes in the articulated ball 4, the tiny drug particles are filtered, and the drug particles with a diameter smaller than the small hole enter the upper connecting tube 2 through the small hole, and the drug particles with a diameter larger than the small hole are blocked and fall back into the atomization chamber 6, and are atomized again by the pressurized gas. The densely arranged small holes in the articulated ball 4 make the drug particles entering the patient's body more delicate, which is conducive to the absorption of the drug, thereby ensuring the atomization treatment effect.

[0046] When the patient's position changes, the mask changes with the patient's position, thereby changing the angle and position of the upper joint 1. The upper connecting tube 2 changes its angle and position with the upper joint 1, and the lower end of the upper connecting tube 2 rotates around the hinge ball 4. Under the action of the counterweight 10, the hinge ball 4 and the atomization chamber 6 below the hinge ball 4 remain stationary, so that the atomization chamber 6 always remains vertical, so that the atomized liquid medicine in the atomization chamber 6 is always at the lowest position of the atomization chamber 6, reducing the residual liquid medicine, thereby ensuring the atomization effect.

[0047] After use, the upper end cover 5 and the lower end cover 7 can be opened to clean and disinfect the atomization chamber 6 and the sealing head 17, thereby reducing the probability of secondary infection.

[0048] Embodiment 2

[0049] like Figure 2 , Figure 5As shown, the first embodiment is repeated, with the following differences: the atomizing chamber 6 is provided with a liquid inlet device 20, which is arranged on one side of the atomizing chamber 6, and the liquid inlet device 20 includes a liquid inlet pipe 201, a piston 202, a sealing ring 203, a spring 204 and a spring seat 205, and the liquid inlet pipe 201 includes a large-diameter tube body section 207 and a small-diameter tube mouth section 206, one end of the tube mouth section 206 is used to connect the syringe, and the other end of the tube mouth section 206 is threadedly fastened to one end of the tube body section 207, and the other end of the tube body section 207 is connected to the atomizing chamber 6 and communicates with the inner cavity of the atomizing chamber 6, and the inner cavity of the tube body section 207 is connected to the inner cavity of the atomizing chamber 6. A spring seat 205 is provided, and the spring seat 205 includes a seat plate and a slide column of an integral structure. The seat plate is connected to the tube body section 207 of the liquid inlet pipe 201, and the slide column is installed in the inner cavity of the piston 202. The piston 202 is a cylindrical structure with one end open and the other end closed. A spring 204 is provided between the inner bottom surface of the piston 202 and the seat plate, and the spring 204 is sleeved outside the slide column. The outer diameter of the piston 202 is greater than the outer diameter of the tube mouth section 206 of the liquid inlet pipe 201. A sealing ring 203 is provided between the closed end of the piston 202 and the tube mouth section 206, and a through hole is provided on the seat plate of the spring seat 205. A throttle valve 208 is provided on the tube body section 207 of the liquid inlet pipe 201, and the throttle valve 208 is arranged close to the atomization chamber 6, and a liquid storage cavity is formed between the throttle valve 208 and the tube mouth section 206 of the liquid inlet pipe 201.

[0050] When in use, this embodiment can inject atomized medicine liquid into the atomization chamber 6 through the liquid inlet device 20, connect the syringe filled with atomized medicine liquid to the pipe mouth section 206 of the liquid inlet pipe 201, and then operate the syringe to push the atomized medicine liquid into the liquid inlet pipe 201. Under the action of the thrust, the atomized medicine liquid pushes the piston 202 to compress the spring 204, thereby opening the liquid inlet pipe 201, and the medicine liquid enters the liquid inlet pipe 201. After the injection is completed, the syringe is removed, and the piston 202 is reset under the action of the spring 204 to seal the pipe mouth section 206 of the liquid inlet pipe 201. Under the action of the throttle valve 208, the atomized medicine liquid in the liquid inlet pipe 201 gradually enters the atomization chamber 6 in a small flow rate, and is then atomized by the pressurized gas. In this way, less atomized medicine liquid is stored in the atomization chamber 6, which can effectively improve the atomization effect and ensure that the atomized medicine liquid particles are finer.

[0051] Embodiment 3

[0052] like Figure 3 , Figure 5As shown, the second embodiment is repeated, with the following differences: blind holes 12 are symmetrically arranged on both sides of the ball head 41 of the articulated ball 4, and a pin 13 is symmetrically arranged in the lower end opening of the upper connecting tube 2, the pin 13 corresponds to the blind hole 12, and the pin 13 is inserted in the blind hole 12, and the articulated ball 4 rotates relative to the upper connecting tube 2 with the pin 13 as the rotating axis. In this embodiment, the articulated ball 4 deflects and swings with the pin 13 as the center.

[0053] Embodiment 4

[0054] like Figure 4 , Figure 5 As shown, the second embodiment is repeated, with the following differences: the aperture of the connecting through hole 11 in the ball head 41 and the lower connecting part 42 is smaller than the inner diameter of the air outlet on the upper end cover 5, and an upper support block 14 is provided on the upper inner wall of the atomizing chamber 6, and the upper support block 14 supports the lower end of the filter plate 15, and the filter plate 15 is pressed on the upper support block 14 through the upper end cover 5, and the diameter of the filter hole on the filter plate 15 is 2 to 5 microns. Blind holes 12 are symmetrically provided on both sides of the ball head 41 of the hinged ball 4, and a pin 13 is symmetrically provided in the lower end opening of the upper connecting tube 2, and the pin 13 corresponds to the blind hole 12, and the pin 13 is inserted in the blind hole 12, and the hinged ball 4 rotates relative to the upper connecting tube 2 with the pin 13 as the rotating axis.

[0055] In this embodiment, it is only necessary to set a connecting through hole 11 in the ball head 41 of the hinged ball 4 and the lower connecting part 42, and the atomized liquid medicine is filtered through the filter plate 15, so the processing and manufacturing are easy, and the processing and production cost is low. Moreover, by opening the upper end cover 5 and taking out the filter plate 15 for backwashing, the filter plate 15 can be effectively prevented from being blocked, thereby ensuring the atomization efficiency.

[0056] It should be noted that the above embodiments are illustrative of the technical solution of the present invention rather than limiting. Equivalent substitutions made by ordinary technicians in the relevant technical field or other modifications made according to the prior art should be included in the scope of rights required by the present invention as long as they do not exceed the concept and scope of the technical solution of the present invention.

Claims

1. A pressure-driven anti-backflow microporous atomization device, characterized in that: The invention comprises an upper joint (1), an upper connecting pipe (2), a one-way valve (3), an articulated ball (4), an upper end cover (5), an atomization chamber (6), a lower end cover (7), an air intake joint (8), an air intake pipe (9) and a counterweight (10). The upper joint (1) is a T-shaped three-way joint, comprising two horizontally connected interfaces and one vertical interface. The two horizontally connected interfaces of the upper joint (1) are respectively connected to a ventilator and an artificial airway through pipelines. The vertical interface of the upper joint (1) is connected to the upper connecting pipe (2). The upper end of the upper connecting pipe (2) is connected to the vertical interface of the upper joint (1). The lower end of the upper connecting pipe (2) is connected to the articulated ball (4). The upper connecting pipe (2) is provided with a one-way valve (3). The articulated ball (4) comprises a ball head (41) and a lower connecting part (42) of an integral structure. The lower connecting part (42) is provided at the lower end of the ball head (41). The upper end cover (5) is threadedly connected to the upper end of the atomizing chamber (6); the upper end cover (5) is provided with an air outlet; the lower connecting portion (42) of the articulated ball (4) is threadedly connected to the air outlet on the upper end cover (5); and the ball head (41) and the lower connecting portion (42) are provided with a connection hole for connecting the upper connecting tube (2) and the inner cavity of the atomizing chamber (6). The lower end of the atomizing chamber (6) is detachably connected to a lower end cover (7), a hollow end cover (17) having a V-shaped cross-section is arranged inside the lower end cover (7), an air inlet connector (8) is arranged at the lower end of the end cover (17), the air inlet connector (8) is located inside the lower end cover (7), the air inlet connector (8) is connected to a pressure air source via an air inlet pipe (9), and a counterweight (10) is arranged at the lower part of the lower end cover (7). A lower support block (16) is arranged on the inner wall of the lower end cover (7), the lower support block (16) supports a sealing head (17), the sealing head (17) is press-fitted onto the lower support block (16) through the atomization chamber (6), a lower sealing ring (18) is arranged between the sealing head (17) and the inner wall of the lower end cover (7), a through hole is arranged on the side wall of the lower end cover (7), and one end of the air inlet pipe (9) passes through the through hole and is connected to an air inlet joint (8) located in the lower end cover (7).

2. The pressure-driven anti-backflow microporous atomization device according to claim 1, characterized in that: The lower end opening of the upper connecting tube (2) is a constricted opening, and the ball head (41) of the hinge ball (4) is clamped in the lower end opening of the upper connecting tube (2). The inner diameter of the lower end opening of the upper connecting tube (2) is smaller than the diameter of the ball head (41) of the hinge ball (4).

3. The pressure-driven anti-backflow microporous atomization device according to claim 1, characterized in that: Blind holes (12) are symmetrically arranged on both sides of the ball head (41) of the hinge ball (4), and a pin shaft (13) is symmetrically arranged in the lower end opening of the upper connecting tube (2). The pin shaft (13) corresponds to the blind hole (12), and the pin shaft (13) is inserted into the blind hole (12). The hinge ball (4) rotates relative to the upper connecting tube (2) with the pin shaft (13) as a rotation axis.

4. The pressure-driven anti-backflow microporous atomization device according to claim 3, characterized in that: The connecting through holes (11) in the ball head (41) and the lower connecting part (42) are a plurality of densely arranged small holes, and the diameter of the densely arranged small holes is 2 to 5 micrometers.

5. The pressure-driven anti-backflow microporous atomization device according to claim 3, characterized in that: The apertures of the connecting through holes (11) in the ball head (41) and the lower connecting part (42) are smaller than the inner diameter of the air outlet hole on the upper end cover (5). An upper support block (14) is provided on the upper inner wall of the atomization chamber (6). The upper support block (14) supports the lower end of the filter plate (15). The filter plate (15) is press-fitted onto the upper support block (14) through the upper end cover (5). The diameter of the filter holes on the filter plate (15) is 2 to 5 micrometers.

6. The pressure-driven anti-backflow microporous atomization device according to claim 1, characterized in that: A pipe rack (19) is provided on the outer wall of the atomization chamber (6) and the outer wall of the lower end cover (7), and the pipe rack (19) is clamped to the air inlet pipe (9).

7. The pressure-driven anti-backflow microporous atomization device according to claim 1, characterized in that: The atomizing chamber (6) is provided with a liquid inlet device (20), which is arranged on one side of the atomizing chamber (6). The liquid inlet device (20) comprises a liquid inlet pipe (201), a piston (202), a sealing ring (203), a spring (204) and a spring seat (205). The liquid inlet pipe (201) comprises a large-diameter tube body section (207) and a small-diameter tube mouth section (206). One end of the tube mouth section (206) is used to connect to a syringe, and the other end of the tube mouth section (206) is threadedly fastened to one end of the tube body section (207). The other end of the tube body section (207) is connected to the atomizing chamber (6) and communicates with the inner cavity of the atomizing chamber (6). The tube body section (207) is provided with a spring. A spring seat (205), the spring seat (205) comprising a seat plate and a slide column of an integral structure, the seat plate being connected to a tube body section (207) of a liquid inlet pipe (201), the slide column being installed in an inner cavity of a piston (202), the piston (202) being a cylindrical structure with an opening at one end and a closing at the other end, a spring (204) being arranged between an inner bottom surface of the piston (202) and the seat plate, the spring (204) being sleeved outside the slide column, the outer diameter of the piston (202) being larger than the outer diameter of a tube mouth section (206) of the liquid inlet pipe (201), a sealing ring (203) being arranged between the closed end of the piston (202) and the tube mouth section (206), and a through hole being arranged on the seat plate of the spring seat (205).

8. The pressure-driven anti-backflow microporous atomization device according to claim 7, characterized in that: A throttle valve (208) is provided on the tube body section (207) of the liquid inlet tube (201). The throttle valve (208) is arranged close to the atomization chamber (6). A liquid storage cavity is formed between the throttle valve (208) and the tube mouth section (206) of the liquid inlet tube (201).

9. The pressure-driven anti-backflow microporous atomization device according to claim 1, characterized in that: An air intake hole (21) is provided in the air intake joint (8), and the air intake hole (21) is a tapered hole with a small diameter at the upper end and a large diameter at the lower end.

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