Aerosol inhalation device capable of accurately controlling dosage

Abstract

The invention relates to the technical field of medical equipment, in particular to an aerosol inhalation device capable of accurately controlling dosage, which comprises an outer shell with an atomization cavity; an atomizing nozzle is inserted into the atomizing cavity; an atomization outlet is formed in the outer shell; an inner shell is further inserted into the atomizing cavity, a plurality of corrugated pipes distributed in the circumferential direction are arranged on the inner shell, and the atomizing cavity communicates with the atomizing outlet through the corrugated pipes; one end of the inner shell is communicated with the atomization outlet through a one-way valve, and the other end is communicated with the outside through a damping channel; the inner shell is further sleeved with a plurality of annular air bags, the annular air bags are arranged at intervals in the pipe length direction of the corrugated pipe and alternately located on the inner side and the outer side of the corrugated pipe, and the annular air bags communicate with the inner shell. Therefore, on one hand, the inspiration channel and the expiration channel of the patient are arranged to be located in different channels, impact on the atomized medicine during expiration is reduced, and on the other hand, when the patient rapidly breathes, the corrugated pipe is deformed into an S shape, and excessive inhalation of the atomized medicine in a short time is avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a nebulized inhalation device with precise dosage control. Background Technology

[0002] Nebulization therapy, as a precise and targeted respiratory drug delivery method, works by using a nebulizer to transform drug solutions or suspensions into tiny atomized particles. These particles can be directly deposited in the respiratory tract and lung target tissues with the patient's breathing, thereby exerting a highly effective therapeutic effect.

[0003] In related technologies, such as Chinese patent application CN109893731A, a device for enhancing the effect of nebulized inhalation through a highly sensitive drug-saving airbag is disclosed. By designing a sealed drug-saving airbag and a trumpet-shaped variable diameter dual-pass structure in the nebulizer, the device utilizes the changes in the patient's respiratory pressure difference to realize the recycling of drug nebulized particles, thus solving the problems of drug waste and environmental pollution.

[0004] However, in actual clinical applications, the effectiveness of nebulizer therapy is still significantly affected by the patient's breathing pattern. When patients experience shortness of breath due to illness or anxiety, the following problems can occur: First, the inhalation frequency increases abnormally, causing the nebulized particles output by the nebulizer to become out of sync with the breathing rhythm, resulting in a large number of nebulized particles being expelled during the exhalation phase; second, the inspiratory flow rate is too fast, and the high-speed airflow of nebulized particles easily forms turbulence in the large airways such as the pharynx and trachea, disrupting the original trajectory of the nebulized particles; third, turbulence causes nebulized particles to collide and aggregate, and small particles of suitable diameter will collide to form large particles. These large particles have difficulty passing through narrowed airway areas and ultimately mainly deposit on the mucous membranes of the pharynx and large airways, failing to reach the target areas such as the bronchioles and alveoli. This not only directly leads to a decrease in treatment effectiveness but also increases the risk of adverse reactions caused by local drug accumulation (such as throat discomfort, hoarseness, etc.). Summary of the Invention

[0005] Therefore, it is necessary to provide a nebulized inhalation device with precise dosage control to address the problem of poor treatment effects in current nebulization therapy.

[0006] The above objectives are achieved through the following technical solutions: A precisely dose-controlled nebulizer inhalation device includes an outer shell, inside which a liquid storage chamber and a nebulization chamber are formed. The liquid storage chamber is configured to store liquid medication. The nebulization chamber is connected to the liquid storage chamber. A nebulizing nozzle is inserted into the nebulization chamber and is connected to an external air source, configured to atomize the liquid medication. The outer shell has a nebulization outlet. An inner shell is also inserted into the nebulization chamber. The inner shell has multiple corrugated tubes arranged circumferentially. Each corrugated tube has one end connected to the nebulization chamber and configured to receive the atomized liquid medication, and the other end connected to the nebulization outlet. The inner shell is connected to the nebulizer outlet via a one-way valve at one end, and to the outside via a damping channel at the other end. The one-way valve is configured to allow one-way communication between the nebulizer outlet and the inner shell when the patient exhales. The inner shell is also fitted with multiple annular airbags, which are spaced apart along the length of the bellows and alternately located on the inner and outer sides of the bellows. The annular airbags are connected to the inner shell. When the patient is in a state of rapid breathing, the exhaled air enters the annular airbags through the inner shell, and the expansion of the annular airbags deforms the bellows into an S-shape.

[0007] Furthermore, the one-way valve includes a reset assembly, a valve body, and two valve plates. The valve body is inserted into the atomizing chamber and located between the atomizing outlet and the inner housing. A connecting channel is provided on the valve body, which connects the atomizing outlet, the atomizing chamber, and the inner housing. Both valve plates are inserted into the inner housing and are hinged to it. When the one-way valve is closed, the two valve plates form a V-shaped structure with the open end facing the atomizing outlet and the closed end separating the atomizing outlet from the inner housing. When the one-way valve is open, the two valve plates form a figure-eight structure with the larger end facing the atomizing outlet and separating the atomizing outlet from the atomizing chamber. The reset assembly is configured to maintain the V-shaped structure of the two valve plates.

[0008] Furthermore, the reset assembly includes two elastic elements, which are respectively connected between the two valve plates and the inner housing. Under the action of the elastic elements, the ends of the two valve plates away from the atomization outlet tend to move closer to each other.

[0009] Furthermore, the elastic element is a torsion spring.

[0010] Furthermore, the reset assembly includes two magnetic components, which are respectively disposed on the two valve plates and form a magnetic connection.

[0011] Furthermore, the inner shell is provided with a guide structure, which is configured to allow the atomized liquid medicine to move along a spiral trajectory inside the corrugated tube; a plurality of first chambers are formed between the outer shell and the inner shell, and the plurality of first chambers are arranged circumferentially, with the first chambers located between the atomization outlet and the corrugated tube; a first return sleeve is inserted into each of the first chambers, the first return sleeve being able to slide elastically along its own axis, and the end away from the atomization outlet is a conical annular structure, with the large end facing the atomization outlet and the small end inserted into the corrugated tube; the end of the corrugated tube near the atomization outlet is a conical annular structure; the first return sleeve divides the first chamber into a first sub-chamber and a second sub-chamber that are not interconnected, the first sub-chamber being connected to the air inlet end of the atomizing nozzle, and the second sub-chamber being connected to both the atomizing nozzle and the gap between the first return sleeve and the corrugated tube.

[0012] Furthermore, each of the second sub-cavities is fitted with a second reflux sleeve, which can slide elastically along its own axis. The second reflux sleeve divides the second sub-cavity into a first sub-cavity and a second sub-cavity that are not interconnected. The first sub-cavity is connected to the inner shell. The second reflux sleeve has a conical ring section located inside the first reflux sleeve, with its large end facing the atomizing outlet and its small end inserted into the first reflux sleeve. The second sub-cavity is connected to both the atomizing nozzle and the gap between the first reflux sleeve and the conical ring section.

[0013] Furthermore, the guiding structure includes multiple spiral guide plates, which are arranged circumferentially and extend spirally along the length of the corrugated pipe.

[0014] Furthermore, the external air source is an air pump, and the air pump's suction end is connected to the outside environment or an oxygen source.

[0015] Furthermore, the nebulizer with precise dose control also includes a mouthpiece or a mask, which is connected to the nebulization outlet.

[0016] The beneficial effects of this invention are: This invention relates to a nebulized inhalation device with precise dosage control. By incorporating a bellows, inner shell, and one-way valve, the device directs the patient's inhalation and exhalation through different channels, thereby reducing the impact on the nebulized medication during exhalation. Furthermore, by using an annular airbag, the device utilizes its deformability and positional characteristics to deform the bellows into an S-shape during rapid breathing. This increases the flow resistance of the nebulized medication within the bellows, limiting the flow rate of the nebulized medication during subsequent rapid inhalation and preventing excessive inhalation of the medication in a short period. While ensuring the effectiveness of quantitative inhalation, it avoids the formation of turbulence due to excessively rapid inhalation, thus reducing the impact on the particle size of the nebulized medication. It also extends the flow path of the nebulized medication, increasing the storage space and preventing an increase in the concentration of the nebulized medication during rapid breathing, thus avoiding any impact on the therapeutic effect. Simultaneously, because the annular airbag stores exhaled air, which has a certain temperature, the exhaled air can insulate the bellows through the annular airbag, reducing condensation of the nebulized medication within the bellows.

[0017] Furthermore, by setting up a guiding structure and utilizing its spiral guiding characteristics, the atomized drug entering the corrugated tube moves along a spiral trajectory, thereby throwing large droplets outward under the action of centrifugal force. Then, a first return sleeve is set up. Utilizing its structural and motion characteristics, when the external air supply decreases (at which point the atomized drug particle size is larger), the first return sleeve moves away from the corrugated tube, increasing the gap between it and the corrugated tube, thus increasing the return ratio of large droplets and ensuring overall atomization effect. When the external air supply increases (at which point the atomized drug particle size is smaller), the first return sleeve moves closer to the corrugated tube, decreasing the gap between it and the corrugated tube, thus reducing the return ratio of large droplets and avoiding ineffective atomization.

[0018] Furthermore, by setting up a second reflux sleeve, utilizing its structural and motion characteristics, when the patient breathes rapidly, the exhaled gas enters the first sub-cavity through the inner shell, which then drives the second reflux sleeve closer to the first reflux sleeve, increasing the gap between the two, thereby increasing the reflux ratio of large droplets and ensuring the overall atomization effect. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of a nebulized inhalation device with precise dose control provided in an embodiment of the present invention; Figure 2 A side view of the nebulized inhalation device with precise dose control provided in an embodiment of the present invention; Figure 3 for Figure 2 Sectional view along the AA direction; Figure 4 for Figure 3 A magnified schematic diagram of the structure at point V in the middle; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point W in the middle; Figure 6 for Figure 3 A magnified schematic diagram of the structure at point X in the middle; Figure 7 for Figure 2 Sectional view along the BB direction; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point Y in the middle; Figure 9 A cross-sectional view of the nebulized inhalation device with precise dose control provided in an embodiment of the present invention; Figure 10 for Figure 9 A magnified schematic diagram of the structure at point Z in the middle.

[0020] in: 1. Outer shell; 101. Main body; 102. Support body; 1021. Atomizing outlet; 1022. Mounting ring; 1023. First fixing ring; 1024. First sleeve; 1025. First ring tube; 1026. First opening; 1027. Second ring tube; 1028. Second opening; 1029. Third fixing ring; 1030. Second sleeve; 103. Atomizing chamber; 104. Spacer ring; 105. Liquid storage chamber; 106. First connecting tube; 107. Second connecting tube; 108. Handle; 109. Limiting ring; 2. Atomizing nozzle; 201. Air inlet pipe; 2011. Straight pipe section; 2012. Conical pipe section; 202. Liquid inlet guide section; 2021. Liquid inlet section; 2022. Guide section; 203. Guide channel; 3. Inner shell; 301. Baffle plate; 3011. Inlet; 302. Baffle ring; 303. Air vent; 304. Connecting pipe; 305. Damping channel; 306. Guide structure; 3061. Spiral guide plate; 307. Third opening; 4. Corrugated pipe; 5. Check valve; 501. Valve body; 5011. Base ring; 5012. Base box; 502. Valve plate; 503. Flow passage; 6. Circular airbag; 7. First chamber; 701. First sub-chamber; 702. Second sub-chamber; 7021. First sub-chamber; 7022. Second sub-chamber; 8. First return sleeve; 801. Second retaining ring; 802. Slide groove; 803. Fourth opening 9. The first spring; 10. Second reflux sleeve; 1001. Conical ring section; 1002. Fourth fixing ring; 10021. Connecting rod; 11. The second spring; 12. Plug; 1201. Injection port; 13. Baffle; 14. Slider. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0023] The following reference Figures 1 to 10 This invention describes a nebulized inhalation device with precise dosage control, which is particularly suitable for nebulizing liquid medications.

[0024] Specifically, the nebulized inhalation device with precise dosage control is configured to include an outer shell 1, which has a main body 101. The main body 101 has a sleeve-like structure and is vertically positioned during use. A support part 102 is integrally formed on the outer peripheral wall of the main body 101. The support part 102 also has a sleeve-like structure, is vertically positioned to the main body 101, and is connected to the main body 101. A nebulization outlet 10 is formed at the end of the support part 102 away from the main body 101. 21. The nebulizer outlet 1021 is used to discharge the nebulized medication. To facilitate the patient's absorption of the nebulized medication sprayed from the nebulizer outlet 1021, the nebulizer outlet 1021 can be made into a mouthpiece structure. The main body 101 and the support body 102 together form a nebulizer chamber 103, which is connected to the nebulizer outlet 1021. A spacer ring 104 is coaxially and integrally formed on the inner peripheral wall of the main body 101. The spacer ring 104 is located below the support body 102 and has a conical structure with the larger end facing up.

[0025] An atomizing nozzle 2 is inserted into the atomizing chamber 103. The atomizing nozzle 2 has an air inlet pipe 201, which is located inside the partition ring 104 and is coaxially arranged with the partition ring 104 and integrally formed with the partition ring 104. The air inlet pipe 201 has a straight pipe section 2011 and a tapered pipe section 2012, which are separated by the partition ring 104. The tapered pipe section 2012 is located above the partition ring 104 with its smaller end facing upwards. The straight pipe section 2011 is used to connect to an external air source, such as an air pump (not shown), and the air pump's suction end is connected to the outside or an oxygen source to facilitate the intake of outside air. Oxygen from an oxygen source is compressed and delivered into the atomizing chamber 103; a liquid storage chamber 105 is formed on the upper side of the diaphragm ring 104 and the outer side of the cone tube section 2012, which is used to store the liquid medicine; the atomizing nozzle 2 also has a liquid receiving guide part 202, which has an integrally formed liquid receiving part 2021 and a guide part 2022, wherein the liquid receiving part 2021 is a sleeve-shaped structure and is coaxially arranged with the main body part 101 and located above the air receiving pipe 201. The top end of the liquid receiving part 2021 blocks the top end of the main body part 101, and the bottom end is connected to the atomizing chamber 103. A plug 12 is sealed at the top of the liquid receiving part 2021. An injection port 1201 is provided at the top of the plug 12, communicating with the liquid receiving part 2021 and used to receive the liquid medicine. A baffle 13 is also provided at the top of the plug 12. The baffle 13 can rotate around the axis of the plug 12 and is used to open and close the injection port 1201. Initially, the baffle 13 is in the closed state of the injection port 1201 to prevent external impurities from entering the atomizing chamber 103 through the injection port 1201.

[0026] The flow guiding part 2022 is located at the bottom end of the liquid receiving part 2021. A flow guiding hole is provided at the bottom end of the flow guiding part 2022. The flow guiding hole has a frustum-shaped structure with the small end facing up. The flow guiding hole is sleeved on the outer periphery of the tapered tube section 2012 and together with the tapered tube section 2012, they form a flow guiding channel 203. The top end of the flow guiding channel 203 is connected to the atomizing chamber 103, and the bottom end is connected to the liquid storage chamber 105.

[0027] During use, first rotate the baffle 13 to open the injection port 1201, then add the medication into the storage chamber 105 through the injection port 1201, and then rotate the baffle 13 to close the injection port 1201; then the patient bites down on the mouthpiece; then the air pump is started, and the air pump delivers high-pressure gas to the nebulization chamber 103 through the air inlet tube 201. The high-pressure gas flows along the... Figure 3The arrow indicates the direction of movement. During the movement of the high-pressure gas, due to the constricted structure of the conical tube section 2012, when the high-pressure gas flows out from the top of the conical tube section 2012, the gas pressure at the top of the conical tube section 2012 decreases, which in turn creates a pressure difference between the two ends of the guide channel 203. Under the action of the pressure difference, the liquid medicine in the reservoir 105 moves upward along the guide channel 203. When the liquid medicine reaches the top of the guide channel 203, it is dispersed under the action of the high-pressure gas and forms atomized particles. Then, it moves with the high-pressure gas and is finally sprayed out from the atomization outlet 1021. As the patient inhales, it enters the lesion from the patient's mouth.

[0028] However, when patients experience shortness of breath due to illness or anxiety, a series of problems can arise that affect the effectiveness of nebulizer therapy: First, an abnormally rapid respiratory rate leads to a disconnect between the output of nebulized particles and the respiratory rhythm: Because the nebulizer outlet 1021 continuously outputs nebulized particles, and the patient's exhalation frequency increases, a large number of uninhaled nebulized particles are directly expelled during exhalation, resulting in drug waste and reducing the effective inhaled dose. Second, excessively rapid inhalation can cause turbulence in the airways: When the high-speed airflow of nebulized particles enters the pharynx, trachea, and other large airways, it disrupts the original stable flow state, forming irregular turbulence. This turbulence interferes with the normal trajectory of the nebulized particles, causing some particles to fail to reach the target tissue along the expected path. Third, turbulence induces collisions and aggregation of nebulized particles, altering their size distribution. Small particles, originally of suitable diameter (reaching the bronchioles and alveoli), collide frequently under turbulent conditions, aggregating into larger particles. Because these larger particles cannot pass through narrow airways, they primarily deposit on the mucous membranes of the pharynx and large airways. This not only prevents them from achieving targeted therapeutic effects, leading to decreased treatment efficacy, but also increases the risk of adverse reactions such as throat discomfort and hoarseness due to localized drug accumulation. These problems are interconnected; the abnormal frequency and excessively rapid flow caused by shortness of breath are the root causes. Ultimately, through particle waste, trajectory deviation, and increased size, they collectively affect the effectiveness and safety of nebulization therapy.

[0029] Based on this, in the nebulized inhalation device with precise dosage control provided in this embodiment of the invention, an inner shell 3 is inserted into the support portion 102. The inner shell 3 has a sleeve-like structure and is coaxially arranged with the support portion 102. A baffle 301 is sealed at one end of the inner shell 3 near the main body portion 101. The baffle 301 and the inner shell 3 are integrally formed and separate the support portion 102 and the main body portion 101. Multiple inlets 3011 are opened on the surface of the baffle 301, and the multiple inlets 3011 are arranged circumferentially. The inner shell 3 is located away from the main body portion 101. A retaining ring 302 is integrally formed on the outer peripheral wall of one end, which separates the support part 102 and the atomization outlet 1021. Multiple outlets are provided on the end face of the retaining ring 302. The multiple outlets are arranged circumferentially and are corresponding to the inlet 3011. A bellows 4 is provided between the corresponding inlet 3011 and the outlet. Multiple bellows 4 are arranged circumferentially along the inner shell 3. One end of the bellows 4 is connected to the atomization chamber 103 through the inlet 3011 and is used to receive the atomized liquid medicine. The other end is connected to the atomization outlet 1021 to facilitate the discharge of the atomized liquid medicine.

[0030] Multiple annular airbags 6 are also fitted on the inner shell 3. The multiple annular airbags 6 are arranged at intervals along the axial direction of the inner shell 3 and are alternately located on the inner and outer sides of the bellows 4. The annular airbags 6 are located both between the baffle 301 and the baffle ring 302 and between the support part 102 and the inner shell 3. Multiple groups of air holes are opened through the circumferential wall of the inner shell 3. The multiple groups of air holes are arranged along the axial direction of the inner shell 3 and are respectively set with the annular airbags 6. Each group of air holes includes multiple air holes 303. The multiple air holes 303 of the same group of air holes are arranged circumferentially. For the annular airbags 6 located on the inner side of the bellows 4, they are directly connected to the multiple air holes 303 of the same group of air holes. For the annular airbags 6 located on the outer side of the bellows 4, they are connected to the multiple air holes 303 of the same group of air holes through the connecting pipe 304.

[0031] The end of the inner shell 3 facing the nebulizer outlet 1021 is connected to the nebulizer outlet 1021 through a one-way valve 5. The one-way valve 5 is configured to enable one-way communication between the nebulizer outlet 1021 and the inner shell 3 when the patient exhales. The end of the inner shell 3 away from the nebulizer outlet 1021 is connected to the outside through a damping channel 305. The damping channel 305 has a small hole structure and passes through both the inner shell 3 and the baffle 301 in the radial direction. Its small hole structure enables it to dampen a large amount of gas when it passes through. The one-way valve 5 is configured to include a reset assembly, a valve body 501, and two valve plates 502. The valve body 501 has a base ring 5011, which is integrally formed inside the support portion 102 and is positioned closer to the atomization outlet 1021 than the inner housing 3, and longitudinally divides the interior of the support portion 102. The inner side of the base ring 5011 has a square hole structure. A base box 5012 is integrally formed on the end face of the base ring 5011 away from the atomization outlet 1021, and the base box 5012 faces the atomization outlet 1021. One side of the housing is open and connected to the base ring 5011. The housing 5012 is open on the side facing away from the atomization outlet 1021. Both the front and rear side plates abut against the end face of the inner shell 3. The upper side plate is inclined downward and spaced apart from the end face of the inner shell 3. The lower side plate is inclined upward and spaced apart from the end face of the inner shell 3. The inner side of the base ring 5011 and the base 5012 together form a connecting channel, which connects the atomization outlet 1021, the atomization chamber 103 and the inner shell 3.

[0032] Both valve plates 502 are inserted into the end of the inner housing 3 near the atomization outlet 1021 and are arranged vertically. The middle part of the valve plate 502 is hinged to the inner housing 3. When the one-way valve 5 is closed, the two valve plates 502 form a V-shaped structure with the open end facing the atomization outlet 1021. A flow channel 503 is formed between the upper valve plate 502 and the upper side plate of the base box 5012, and a flow channel 503 is formed between the lower valve plate 502 and the lower side plate of the base box 5012. The flow channels 503 are connected to the wave... The tube 4 and the nebulizer outlet 1021 facilitate the discharge of the nebulized medication. When the one-way valve 5 is open, the two valve plates 502 form a figure-eight structure, with the larger end facing the nebulizer outlet 1021. The upper valve plate 502 overlaps with the upper side plate of the base box 5012, and the lower valve plate 502 overlaps with the lower side plate of the base box 5012, closing the flow channel 503 and connecting the nebulizer outlet 1021 to the inner shell 3. This allows the patient to inhale and exhale through different channels, reducing the impact on the nebulized medication during exhalation. Initially, the one-way valve 5 is in the closed state.

[0033] The reset assembly is configured to maintain the V-shaped structure of the two valve plates 502. The reset assembly may include two elastic elements, which may be torsion springs connected between the valve plates 502 and the inner housing 3. Under the action of the torsion springs, the ends of the two valve plates 502 away from the atomization outlet 1021 tend to move closer to each other, thereby maintaining the V-shaped structure.

[0034] During normal use, first rotate the baffle 13 to open the injection port 1201, then add the medication into the reservoir 105 through the injection port 1201, and then rotate the baffle 13 to close the injection port 1201; then the patient bites down on the end of the support part 102 away from the main body 101; then the air pump is started, and the air pump delivers high-pressure gas to the nebulization chamber 103 through the air inlet tube 201. The high-pressure gas flows along the... Figure 3 The arrow indicates the direction of movement. During the movement of high-pressure gas, due to the constricted structure of the conical tube section 2012, when the high-pressure gas flows out from the top of the conical tube section 2012, the gas pressure at the top of the conical tube section 2012 decreases, which in turn creates a pressure difference between the two ends of the guide channel 203. Under the action of the pressure difference, the liquid medicine in the storage chamber 105 moves upward along the guide channel 203. When the liquid medicine reaches the top of the guide channel 203, it is dispersed under the action of the high-pressure gas and forms atomized particles. Then, along with the high-pressure gas, it passes through the inlet 3011, the corrugated pipe 4, and the flow channel 503 in sequence, and is finally sprayed out from the atomization outlet 1021. As the patient inhales, it enters the lesion from the patient's mouth.

[0035] When the patient exhales, the exhaled air pushes open the two valve plates 502, and the one-way valve 5 opens; the exhaled air then enters the inner shell 3 and is discharged to the outside through the damping channel 305.

[0036] When a patient breathes rapidly, the volume of exhaled air is relatively large. Under the damping effect of the damping channel 305, it is difficult for a large volume of exhaled air to be directly discharged to the outside through the damping channel 305. The exhaled air then enters the annular airbag 6 through the air hole 303, inflating the annular airbag 6. At this time, since the adjacent annular airbags 6 are located on the inner and outer sides of the bellows 4 respectively, when the annular airbag 6 is inflated, the annular airbag 6 located on the outer side presses the bellows 4 inward, and the annular airbag 6 located on the inner side pushes the bellows 4 outward, so that the bellows 4 forms an S-shaped structure.

[0037] When the bellows 4 forms an S-shaped structure, it significantly increases fluid resistance by increasing the tortuosity of the flow path of the nebulized drug within the bellows 4. When the patient is in a state of rapid inspiration, this resistance can directly limit the instantaneous flow rate of the nebulized drug, preventing excessive drug from being inhaled in a short period of time. This ensures the stability of the drug inhalation volume per unit time, meeting the requirements of precise dosage control, and avoids airway turbulence caused by excessively rapid inspiratory flow from the source. The reduction of turbulence can reduce the degree of disorder in the movement trajectory of nebulized particles, reduce the risk of aggregation caused by high-speed collisions between particles, thereby maintaining the uniformity of drug particle size and ensuring that it can smoothly reach the target areas such as bronchioles and alveoli.

[0038] Meanwhile, the S-shaped corrugated tube 4 also extends the flow path of the nebulized medication, which is equivalent to increasing the temporary storage space of the nebulized medication within the device. When the patient's respiratory rate increases abnormally, this space can temporarily store excess nebulized medication, preventing it from rushing to the nebulization outlet 1021 in a short period of time, thereby preventing drastic fluctuations in the concentration of inhaled medication. This buffering effect ensures the matching of the inhaled medication concentration with the treatment needs, reduces local drug accumulation caused by sudden increases in concentration, and lowers the probability of adverse reactions such as throat discomfort and hoarseness.

[0039] Furthermore, the exhaled air stored within the annular airbag 6 has a temperature close to that of the human body, forming an insulating layer through direct contact with the corrugated tube 4. This insulating effect reduces the temperature difference between the inner wall of the corrugated tube 4 and the nebulized drug, minimizing condensation of the drug on the tube wall due to cooling, thereby reducing drug loss and ensuring that more nebulized particles effectively reach the target tissue. Simultaneously, the sealed storage of the exhaled air prevents it from directly impacting the drug mist flow inside the nebulization chamber 103, further reducing the interference of the exhaled air on drug concentration and particle state.

[0040] In other embodiments, the reset assembly may also be configured to include two magnetic elements, which are respectively disposed on two valve plates 502 and form a magnetic connection. Under the action of magnetism, the ends of the two valve plates 502 away from the atomization outlet 1021 tend to move closer to each other, thereby maintaining the V-shaped structure.

[0041] In other embodiments, the center of gravity of the upper valve plate 502 may be set further away from the hinge point than the atomization outlet 1021, while the center of gravity of the lower valve plate 502 may be set closer to the atomization outlet 1021 than the hinge point. This way, under the action of gravity, the ends of the two valve plates 502 that are far from the atomization outlet 1021 tend to move closer to each other to maintain the V-shaped structure.

[0042] In other embodiments, the air supply of the air pump is susceptible to fluctuations due to multiple factors during operation, which in turn affects the particle size of the nebulized medication and its therapeutic effect. Changes in the physical state of the tubing are one of the main contributing factors. When the tubing is compressed or bent, the gas flow cross-section narrows, resulting in a decrease in the actual output gas flow rate. Conversely, when the compression is relieved and the bending is corrected, the flow cross-section returns to normal, and the flow rate increases accordingly. Dynamic changes in operating power are equally critical. Decreasing power leads to a drop in air pump output pressure and a reduction in air supply; increasing power increases output pressure and thus increases air supply. The randomness of these factors makes it difficult to maintain a constant air supply, resulting in unexpected fluctuations. Furthermore, when the air supply decreases, the kinetic energy of the airflow at the nebulizer nozzle 2 is insufficient, failing to adequately disperse the medication, resulting in larger nebulized particles. These large particles have difficulty passing through narrow airway areas and tend to deposit on the mucous membranes of the pharynx and large airways, failing to reach the target areas such as the bronchioles and alveoli, thus reducing treatment efficiency.

[0043] Based on this, in the nebulized inhalation device with precise dosage control provided in the embodiments of the present invention, a guide structure 306 is provided on the inner peripheral wall of each inlet 3011. The guide structure 306 is used to make the nebulized liquid move along a spiral trajectory inside the corrugated tube 4, and then large droplets can be thrown outward under the action of centrifugal force. The guide structure 306 can be configured as multiple spiral guide plates 3061, which are arranged circumferentially and extend spirally along the length of the corrugated tube 4 to achieve spiral guidance of the nebulized liquid.

[0044] An integral mounting ring 1022 is formed inside the support portion 102. The mounting ring 1022 is sleeved on the inner shell 3 and is located between the base ring 5011 and the retaining ring 302. Multiple mounting holes are formed on the end face of the mounting ring 1022 near the atomization outlet 1021. The multiple mounting holes are arranged circumferentially. A first fixing ring 1023 is integrally formed on the inner wall of each mounting hole. A first sleeve 1024 is integrally formed vertically on the end face of each first fixing ring 1023 away from the atomization outlet 1021. The inner wall of the mounting hole, the end face of the first fixing ring 1023 away from the atomization outlet 1021, the outer peripheral wall of the first sleeve 1024, and the end face of the retaining ring 302 near the atomization outlet 1021 together form a first chamber 7. A first return sleeve 8 is sleeved on each first sleeve 1024. The first return sleeve 8 can slide along its own axis.

[0045] The first return sleeve 8 has a straight section and a conical section. The conical section is located further away from the atomization outlet 1021 than the straight section and is inserted into the bellows 4. The end of the bellows 4 near the atomization outlet 1021 has a conical ring structure and the taper is equal to that of the conical section. When the first return sleeve 8 slides axially, the gap between it and the bellows 4 will increase or decrease accordingly. A second fixing ring 801 is integrally fitted on the outer peripheral wall of each first return sleeve 8. The second fixing ring 801 is located at the boundary between the straight section and the conical section and divides the first chamber 7 into a first compartment 701 and a second compartment 702 that are not connected to each other. The first compartment 701 is located closer to the atomization outlet 1021 than the second compartment 702.

[0046] A first annular tube 1025 is fixedly sleeved on the outer peripheral wall of the support portion 102; a plurality of first openings 1026 are opened on the circumferential side wall of the support portion 102, the plurality of first openings 1026 are arranged circumferentially and correspond to the first chamber 7, the first openings 1026 connect the first annular tube 1025 and the first sub-chamber 701; the first annular tube 1025 is connected to the straight pipe section 2011 through the first connecting pipe 106, which facilitates the introduction of high-pressure gas into the first sub-chamber 701, thereby enabling the first return sleeve 8 to slide axially. A second annular tube 1027 is fixedly sleeved on the outer peripheral wall of the support portion 102. The second annular tube 1027 is positioned further away from the nebulization outlet 1021 than the first annular tube 1025. Multiple second openings 1028 are formed on the circumferential sidewall of the support portion 102, arranged circumferentially and corresponding to the first chamber 7. The second openings 1028 connect the second annular tube 1027 and the second sub-chamber 702. The second annular tube 1027 is connected to the guide channel 203 via a second connecting tube 107, facilitating the return of larger nebulized drug particles to the guide channel 203 for re-nebulization, ensuring the nebulization treatment effect. A first spring 9 is connected between each first fixing ring 1023 and the second fixing ring 801. Under the action of the first spring 9, the first return sleeve 8 can elastically slide along its own axis, facilitating the reset of the first return sleeve 8.

[0047] Initially, the first spring 9 is in its original length state, and the gap between the first return sleeve 8 and the bellows 4 is small.

[0048] During use, after the air pump is started, the atomized medicine flows along... Figure 3The arrow indicates the direction of movement; guided by the spiral guide plate 3061, the atomized medicine moves along a spiral trajectory inside the bellows 4, and then, under the action of centrifugal force, large droplets are thrown outward; when the atomized medicine moves to the gap between the first return sleeve 8 and the bellows 4, part of the atomized medicine is sequentially transported back to the guide channel 203 through the gap between the first return sleeve 8 and the bellows 4, the second opening 1028, the second ring pipe 1027, and the second connecting pipe 107. At the same time, part of the high-pressure gas is transported to the first ring pipe 1025 through the first connecting pipe 106, and then enters the first compartment 701 through the first opening 1026; driven by this part of high-pressure gas, the first return sleeve 8 moves closer to the bellows 4, the first spring 9 is stretched, and the gap between the first return sleeve 8 and the bellows 4 is reduced, reducing ineffective atomization.

[0049] When the air supply of the air pump decreases, the particle size of the atomized drug is larger, and the gas received by the first chamber 701 decreases. At this time, the first spring 9 is released, which drives the first return sleeve 8 to move away from the bellows 4, increasing the gap between it and the bellows 4, thereby increasing the return ratio of large droplets and ensuring the overall atomization effect.

[0050] Similarly, when the air supply of the air pump increases, the particle size of the atomized drug is smaller, and the gas received by the first chamber 701 increases. Under the push of the high-pressure gas, the first return sleeve 8 moves closer to the bellows 4, the first spring 9 is stretched, and the gap between the first return sleeve 8 and the bellows 4 is reduced, thereby reducing the return ratio of large droplets and reducing ineffective atomization.

[0051] In a further embodiment, to improve the nebulization treatment effect, a third fixing ring 1029 is integrally formed on the inner wall of each mounting hole, and the third fixing ring 1029 is located near the second opening 1028; a second sleeve 1030 is integrally formed vertically on the end face of each third fixing ring 1029 near the nebulization outlet 1021; a second return sleeve 10 is sleeved on each second sleeve 1030, and the second return sleeve 10 can slide along its own axis; a fourth fixing ring 1002 is fixedly set on the end face of the second return sleeve 10 facing the nebulization outlet 1021, and the fourth fixing ring 1002 divides the second compartment 702 into a first sub-compartment 7021 and a second sub-compartment 7022 that are not interconnected; a plurality of third openings 307 are opened on the circumferential side wall of the inner shell 3, the plurality of third openings 307 are arranged circumferentially and correspond to the first chamber 7, and the third openings 307 connect the first sub-compartment 7021 and the inner shell 3.

[0052] At least one connecting rod 10021 is fixedly installed on the inner peripheral wall of the fourth fixed ring 1002. The connecting rod 10021 extends radially and penetrates the conical section inward. A conical ring section 1001 is fixedly installed at the inner end of the connecting rod 10021. The taper of the conical ring section 1001 is equal to the taper of the conical section, with the larger end facing the atomizing outlet 1021 and the smaller end inserted into the first return sleeve 8. At least one sliding groove 802 is provided on the conical section. The sliding groove 802 extends axially along the conical section. The connecting rod 10021 passes through the sliding groove 802 and can slide along the sliding groove 802. A slider 14 is sleeved on the 21, and the slider 14 is simultaneously inserted into the slide groove 802. The slider 14 can slide synchronously along the slide groove 802 with the connecting rod 10021, and is used to seal the slide groove 802 to prevent the inner and outer connections of the cone section. When the second return sleeve 10 slides axially, the gap between it and the first return sleeve 8 will increase or decrease accordingly. At least one fourth opening 803 is also provided on the cone section. The fourth opening 803 is located further away from the atomization outlet 1021 than the slide groove 802, and is used to connect the gap between the second return sleeve 10 and the first return sleeve 8 with the second sub-cavity 7022. A second spring 11 is connected between each third fixing ring 1029 and the fourth fixing ring 1002. Under the action of the second spring 11, the second return sleeve 10 can slide elastically along its own axis, which facilitates the reset of the second return sleeve 10.

[0053] Initially, the second spring 11 is in its original length state, and the gap between the first return sleeve 8 and the second return sleeve 10 is small.

[0054] During use, after the air pump is started, the atomized medicine flows along... Figure 3 The arrow indicates movement in the direction indicated. Guided by the spiral guide plate 3061, the atomized medication moves along a spiral trajectory inside the corrugated tube 4, and under centrifugal force, large droplets are thrown outward. When the atomized medication moves to the gap between the first return sleeve 8 and the second return sleeve 10, part of the atomized medication is sequentially transported back into the guide channel 203 through the gap between the first return sleeve 8 and the second return sleeve 10, the fourth opening 803, the second opening 1028, the second ring tube 1027, and the second connecting tube 107. At the same time, the patient's exhaled air also enters the first sub-cavity 7021 through the third opening 307. Under the pushing action of this part of the air, the second return sleeve 10 moves away from the third fixing ring 1029, the second spring 11 is compressed, and the gap between the first return sleeve 8 and the second return sleeve 10 is increased, thereby increasing the return ratio of large droplets and ensuring the overall atomization effect.

[0055] When the patient breathes rapidly, the gas entering the first sub-cavity 7021 through the third opening 307 increases. Under the pushing action of this gas, the second return sleeve 10 moves away from the third fixing ring 1029, the second spring 11 is compressed, and the gap between the first return sleeve 8 and the second return sleeve 10 increases. This increases the return ratio of large droplets, ensures the overall nebulization effect, and reduces the problem of increased flow resistance of nebulized drugs caused by the corrugated tube 4 changing to an S-shape, which makes them more likely to collide with each other, resulting in the formation of large droplets and affecting the nebulization treatment effect.

[0056] When the patient resumes normal breathing, the gas received by the first sub-cavity 7021 decreases. At this time, the second spring 11 is released, which drives the second return sleeve 10 to move closer to the third fixed ring 1029, reducing the gap between it and the first return sleeve 8, thereby reducing the return ratio of large droplets and avoiding ineffective atomization.

[0057] In other embodiments, a handle 108 is integrally formed on the outer peripheral wall of the outer casing 1 to facilitate gripping.

[0058] Understandably, the handle 108 can be set to be relative to the support part 102.

[0059] In some other embodiments, in order to facilitate the fixing of the first connecting pipe 106 and the second connecting pipe 107, a limiting ring 109 is also fixedly sleeved on the main body 101. The limiting ring 109 is located below the support body 102 and is sleeved on the outer periphery of the first connecting pipe 106 and the second connecting pipe 107, and is fixedly connected to the first connecting pipe 106 and the second connecting pipe 107.

[0060] In other embodiments, to facilitate the patient's inhalation of the nebulized medication, the nebulized inhalation device with precise dose control is configured to also include a mask. The mask is fitted onto the end of the support portion 102 away from the main body portion 101 and is connected to the nebulization outlet 1021, so that the patient can easily wear the mask on their face using the ear loops attached to the mask.

[0061] The above embodiments are merely illustrative of several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A nebulized inhalation device with precise dosage control, characterized in that, The precisely dose-controlled nebulizer includes an outer shell, inside which a liquid storage chamber and a nebulization chamber are formed, the liquid storage chamber being configured to store liquid medication. The atomizing chamber is connected to the liquid storage chamber; an atomizing nozzle is inserted into the atomizing chamber, the atomizing nozzle is connected to an external air source, and is configured to atomize the medicine liquid; The outer shell is provided with an atomizing outlet; an inner shell is also inserted into the atomizing chamber, and multiple corrugated tubes are provided on the inner shell. The multiple corrugated tubes are arranged circumferentially, and each corrugated tube is connected to the atomizing chamber at one end and configured to receive the atomized drug solution, and connected to the atomizing outlet at the other end; the end of the inner shell facing the atomizing outlet is connected to the atomizing outlet through a one-way valve, and the end away from the atomizing outlet is connected to the outside through a damping channel; the one-way valve is configured to allow one-way communication between the atomizing outlet and the inner shell when the patient exhales; multiple annular airbags are also fitted on the inner shell, and the multiple annular airbags are arranged at intervals along the length of the corrugated tubes and are alternately located on the inner and outer sides of the corrugated tubes. The annular airbags are connected to the inner shell; when the patient is in a state of rapid breathing, the exhaled air enters the annular airbags through the inner shell, and the annular airbags expand and deform the corrugated tubes into an S-shape.

2. The nebulized inhalation device with precise dosage control according to claim 1, characterized in that, The one-way valve includes a reset assembly, a valve body, and two valve plates. The valve body is inserted into the atomizing chamber and located between the atomizing outlet and the inner housing. A connecting channel is provided on the valve body, which connects the atomizing outlet, the atomizing chamber, and the inner housing. Both valve plates are inserted into the inner housing and are hinged to it. When the one-way valve is closed, the two valve plates form a V-shaped structure with the open end facing the atomizing outlet and the closed end separating the atomizing outlet from the inner housing. When the one-way valve is open, the two valve plates form a figure-eight structure with the larger end facing the atomizing outlet and separating the atomizing outlet from the atomizing chamber. The reset assembly is configured to maintain the V-shaped structure of the two valve plates.

3. The nebulized inhalation device with precise dosage control according to claim 2, characterized in that, The reset assembly includes two elastic elements, which are respectively connected between the two valve plates and the inner housing. Under the action of the elastic elements, the ends of the two valve plates away from the atomization outlet tend to move closer to each other.

4. The nebulized inhalation device with precise dosage control according to claim 3, characterized in that, The elastic element is a torsion spring.

5. The nebulized inhalation device with precise dosage control according to claim 2, characterized in that, The reset assembly includes two magnetic components, which are respectively disposed on the two valve plates and form a magnetic connection.

6. The nebulized inhalation device with precise dosage control according to claim 1, characterized in that, The inner shell is provided with a guide structure, which is configured to allow the atomized medicine to move along a spiral trajectory inside the corrugated tube. A plurality of first chambers are formed between the outer shell and the inner shell, arranged circumferentially, and located between the atomization outlet and the corrugated tube. Each first chamber is fitted with a first return sleeve, which is elastically sliding along its own axis. The end of the return sleeve away from the atomization outlet is a conical annular structure, with the larger end facing the atomization outlet and the smaller end inserted into the corrugated tube. The end of the corrugated tube near the atomization outlet is also a conical annular structure. The first return sleeve divides the first chamber into a first non-communicating sub-chamber and a second non-communicating sub-chamber. The first sub-chamber is connected to the air inlet of the atomizing nozzle, and the second sub-chamber is connected to both the atomizing nozzle and the gap between the first return sleeve and the corrugated tube.

7. The nebulized inhalation device with precise dosage control according to claim 6, characterized in that, Each of the second sub-cavities is fitted with a second reflux sleeve, which can slide elastically along its own axis. The second reflux sleeve divides the second sub-cavity into a first sub-cavity and a second sub-cavity that are not connected to each other. The first sub-cavity is connected to the inner shell. The second reflux sleeve has a conical ring section, which is located inside the first reflux sleeve, with its large end facing the atomizing outlet and its small end inserted into the first reflux sleeve. The second sub-cavity is connected to both the atomizing nozzle and the gap between the first reflux sleeve and the conical ring section.

8. The nebulized inhalation device with precise dosage control according to claim 6, characterized in that, The guiding structure includes multiple spiral guide plates, which are arranged circumferentially and extend spirally along the length of the corrugated pipe.

9. The nebulized inhalation device with precise dosage control according to claim 1, characterized in that, The external air source is an air pump, and the air pump's suction end is connected to the outside environment or an oxygen source.

10. The nebulized inhalation device with precise dosage control according to claim 1, characterized in that, The nebulizer with precise dose control also includes a mouthpiece or a mask, which is connected to the nebulizer outlet.

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