Medical atomizer capable of preventing gas backflow pollution

Abstract

The invention relates to the technical field of liquid medicine atomizers, in particular to a medical atomizer capable of preventing gas backflow pollution, which comprises a compressor, a connecting pipe, a liquid storage tank and the like, the compressor is connected with a connecting pipe; nozzles are arranged at the other ends of the connecting pipes; the other end of the connecting pipe is detachably connected with a liquid storage tank, and a sprayer arranged at the other end of the connecting pipe is located in the liquid storage tank. According to the device, upward flowing medicine mist is blocked through the one-way diaphragm, the device is different from the prior art, and waste of the upward flowing medicine mist is avoided; air in the connecting cylinder is compressed through the pressure piece and then enters the air bag, the air bag expands inwards, and therefore the rubber pipe is gradually changed into an inverted circular truncated cone shape, when the rapid medicine mist passes through the rubber pipe, the flow speed is reduced, and the situation that the flow speed of the medicine mist is too large, a patient feels uncomfortable, and the use effect of the patient is affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of liquid medicine atomizers, and in particular to a medical atomizer capable of preventing gas backflow contamination. Background Art

[0002] A medical nebulizer is a device that converts liquid medicine into tiny particles and delivers them to the patient's respiratory tract through an airflow.

[0003] When patients use medical nebulizers, since most of them suffer from respiratory diseases, they are prone to coughing or shortness of breath, which increases the velocity of the airflow exhaled by the patients and the amount of air exhaled in a short period of time, causing the medicine mist to reflux under the action of the patient's exhalation. In the prior art, a gasket is generally provided at the nozzle of the medical nebulizer. When the medicine mist refluxes, the gasket is opened by the airflow, so that the refluxed medicine mist flows out of the nozzle to the outside. However, when the gasket is opened, the medicine mist sprayed from the medical nebulizer will also flow out from the gasket opening position, resulting in a waste of medicine mist. Therefore, there is an urgent need for a medical nebulizer that can solve the above-mentioned waste of medicine mist. Summary of the invention

[0004] In order to overcome the disadvantage that the pressure in the medical nebulizer will gradually increase under the obstruction of the backflow medicine mist, when the backflow medicine gradually dissipates, at that moment, the flow rate of the medicine mist sprayed from the medical nebulizer will accelerate, and when it blows to the patient's face, the patient will feel uncomfortable, affecting the patient's use, the present invention provides a medical nebulizer that can prevent gas backflow contamination.

[0005] The technical solution is: a medical nebulizer to prevent gas backflow contamination, including a compressor, a connecting pipe, a liquid storage tank, a sealed cover, an atomizing sheet and a mask; the compressor is connected to a connecting pipe; a nozzle is arranged at the other end of the connecting pipe; the other end of the connecting pipe is detachably connected to the liquid storage tank, and the nozzle arranged at the other end of the connecting pipe is located in the liquid storage tank; a sealed cover is screwed on the liquid storage tank; an air outlet is arranged on the sealed cover; a connecting port is arranged on the sealed cover, and the air outlet is connected to the connecting port; a mask is plugged into the connecting port of the sealed cover; a liquid guide tube is arranged on the sealed cover, the liquid guide tube is located in the liquid storage tank, and the liquid guide tube is connected to the air outlet; a first guide tube is arranged at the lower part of the liquid guide tube, and the first guide tube is located on the outside of the connecting tube nozzle; a second guide tube is arranged in the liquid guide tube, and the second guide tube is located above the first guide tube; the second guide tube An atomizer is detachably connected inside and is located above the first guide tube; it also includes a one-way diaphragm, a rubber tube, an airbag and a flow limiting component; a hollow guide plate for guiding the backflow medicine mist is arranged on the connection port of the closed cover; a collecting chamber for collecting the backflow medicine mist is opened on the closed cover; the collecting chamber is connected to the connection port through the hollow guide plate; a one-way diaphragm for preventing the medicine mist from flowing back into the liquid storage tank is connected inside the connection port of the closed cover, and the upper surface of the one-way diaphragm is located at the hollow guide plate; a rubber tube for reducing the flow rate of the rising medicine mist is detachably connected inside the connection port of the closed cover; the rubber tube is located above the one-way diaphragm; an airbag for changing the diameter of the lower side of the rubber tube is connected to the lower side of the rubber tube; a flow limiting component is arranged inside the closed cover, and the flow limiting component is used to control the expansion of the airbag to change the diameter of the lower side of the rubber tube.

[0006] As a further preferred scheme, the flow limiting assembly includes a connecting tube, a pressure plate, a retaining ring and an air pipe; a connecting tube is fixedly connected and communicated with the air outlet of the sealed cover; a pressure plate is slidably connected inside the connecting tube; a retaining ring is fixedly connected to the right side of the connecting tube; the left side of the connecting tube is connected to the air pipe; and the other end of the air pipe is connected to the airbag.

[0007] As a further preferred embodiment, it also includes an adjustment component, which includes a rotating block, a fixed rod, a first closing piece and a second closing piece; the rotating block is rotatably connected to the upper side of the sealed cover; the fixed rod is fixedly connected to the lower side of the rotating block; the fixed rod passes through the sealed cover and is located in the liquid guide tube; the first closing piece is fixedly connected to the lower side of the fixed rod; the first closing piece is provided with a first connecting groove; the second closing piece is fixedly connected in the liquid guide tube of the sealed cover; the second closing piece is provided with a second connecting groove; the upper surface of the second closing piece is in contact with the lower surface of the first closing piece; the second connecting groove is connected to the first connecting groove.

[0008] As a further preferred solution, a handle is provided on the liquid storage tank.

[0009] As a further preferred solution, the one-way membrane is arranged to be inclined toward the hollow guide plate.

[0010] As a further preferred solution, a plurality of semicircular grooves are provided on the rotating block.

[0011] As a further preferred solution, the pressure plate is arranged with its middle portion convex to the left.

[0012] As a further preferred solution, a dispersion rod is also included; the dispersion rod is fixedly connected to the connection port of the sealing cover.

[0013] As a further preferred embodiment, it also includes a hose and an annular frame; when the mask is not connected to the connection port of the sealed cover, the hose is connected to the connection port of the sealed cover; the other end of the hose is connected to the mask; and the annular frame is fixedly connected to the lower side of the liquid storage tank.

[0014] As a further preferred solution, a bracket is also included; the bracket is fixedly connected to the left side of the compressor.

[0015] The present invention has the following advantages: the present invention realizes blocking the upward flowing medicine mist by a one-way membrane, which is different from the prior art and can avoid the waste of the upward flowing medicine mist;

[0016] The air in the connecting tube is compressed by the pressure plate and then enters the air bag, causing the air bag to expand inward, so that the rubber tube gradually changes into an inverted truncated cone shape. When the above-mentioned rapid drug mist passes through the rubber tube, the flow rate is reduced, thereby preventing the above-mentioned drug mist from flowing too fast, causing discomfort to the patient and affecting the use effect of the patient;

[0017] The rapid drug mist is dispersed by the dispersion rod, thereby reducing the concentration of the drug mist and avoiding excessive concentration of the drug mist, which may cause discomfort to the patient and affect the effect of the patient's use;

[0018] The medicine mist is sprayed from the mask along the hose after passing through the connecting port, so as to prevent the liquid storage tank from tilting when the patient lies on the bed, making it difficult to completely atomize the medicine liquid in the liquid storage tank, causing residual medicine liquid in the liquid storage tank, and affecting the atomization of the medicine liquid by the medical nebulizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the medical atomizer for preventing gas backflow contamination of the present invention;

[0020] Figure 2 It is a schematic diagram of the combined three-dimensional structure of the regulating assembly, liquid storage tank, sealing cover, one-way diaphragm and rubber tube of the present invention, wherein the liquid storage tank and the sealing cover are cut-away;

[0021] Figure 3 For the present invention Figure 2 A magnified image of the area at A;

[0022] Figure 4 For the present invention Figure 2 A magnified view of the area B in FIG.

[0023] Figure 5 This is a front view of the current limiting component, rubber tube, and airbag assembly of the present invention;

[0024] Figure 6 It is a front view of the combination of the sealing cover, the mask and the hose of the present invention;

[0025] Figure 7 It is a top view of the one-way diaphragm, rubber tube and dispersion rod assembly of the present invention.

[0026] Wherein: 1- compressor, 2- connecting pipe, 3- liquid storage tank, 3001- handle, 4- airtight cover, 4001- air outlet, 4002- connecting port, 4003- collecting chamber, 4004- guiding tube, 4005- hollow guide plate, 4006- first guide tube, 4007- second guide tube, 5- atomizing sheet, 6- mask, 7- one-way diaphragm, 8- rubber tube, 9- airbag, 101- rotating block, 10101- semicircular groove, 102- fixing rod, 103- first closing sheet, 10301- first connecting groove, 104- second closing sheet, 10401- second connecting groove, 201- connecting tube, 202- pressure sheet, 203- retaining ring, 204- air pipe, 301- dispersion rod, 401- hose, 402- annular frame, 501- bracket. DETAILED DESCRIPTION

[0027] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0028] Example 1

[0029] like Figure 1-Figure 5As shown, a medical nebulizer for preventing gas backflow contamination includes a compressor 1, a connecting pipe 2, a liquid storage tank 3, a sealed cover 4, an atomizing sheet 5 and a mask 6; the compressor 1 is connected to the connecting pipe 2; the other end of the connecting pipe 2 is provided with a nozzle; the other end of the connecting pipe 2 is detachably connected to the liquid storage tank 3, and the nozzle provided at the other end of the connecting pipe 2 is located in the liquid storage tank 3; the liquid storage tank 3 is screwed with a sealed cover 4; the sealed cover 4 is provided with an air outlet 4001; the sealed cover 4 is provided with a connecting port 4002, and the air outlet 4001 is communicated with the connecting port 4002; the connecting port of the sealed cover 4 A mask 6 is plugged into 4002; a liquid guide tube 4004 is provided on the sealed cover 4, the liquid guide tube 4004 is located in the liquid storage tank 3, and the liquid guide tube 4004 is connected to the gas outlet 4001; a first guide tube 4006 is provided at the lower part of the liquid guide tube 4004, and the first guide tube 4006 is located outside the nozzle of the connecting tube 2; a second guide tube 4007 is provided in the liquid guide tube 4004, and the second guide tube 4007 is located above the first guide tube 4006; an atomizer sheet 5 is detachably connected to the second guide tube 4007, and the atomizer sheet 5 is located above the first guide tube 4006;

[0030] It also includes a one-way diaphragm 7, a rubber tube 8, an airbag 9 and a flow limiting component; a hollow guide plate 4005 is arranged on the connecting port 4002 of the sealed cover 4; a collecting chamber 4003 is opened on the sealed cover 4; the collecting chamber 4003 is connected to the connecting port 4002 through the hollow guide plate 4005; a one-way diaphragm 7 is connected to the connecting port 4002 of the sealed cover 4, and the upper surface of the one-way diaphragm 7 is located at the hollow guide plate 4005; a rubber tube 8 is detachably connected to the connecting port 4002 of the sealed cover 4; the rubber tube 8 is located above the one-way diaphragm 7; an airbag 9 is connected to the lower side of the rubber tube 8; a flow limiting component is arranged in the sealed cover 4.

[0031] The flow limiting assembly includes a connecting tube 201, a pressure plate 202, a baffle ring 203 and an air pipe 204; the connecting tube 201 is fixedly connected and communicated with the air outlet 4001 of the sealing cover 4; the pressure plate 202 is slidably connected with the connecting tube 201; the baffle ring 203 is fixedly connected to the right side of the connecting tube 201; the air pipe 204 is communicated with the left side of the connecting tube 201; the other end of the air pipe 204 is communicated with the airbag 9.

[0032] It also includes an adjustment component, which includes a rotating block 101, a fixed rod 102, a first closing piece 103 and a second closing piece 104; the rotating block 101 is rotatably connected to the upper side of the sealed cover 4; the fixed rod 102 is fixedly connected to the lower side of the rotating block 101; the fixed rod 102 penetrates the sealed cover 4 and is located in the liquid guide tube 4004; the first closing piece 103 is fixedly connected to the lower side of the fixed rod 102; the first closing piece 103 is provided with a first connecting groove 10301; the second closing piece 104 is fixedly connected to the liquid guide tube 4004 of the sealed cover 4; the second closing piece 104 is provided with a second connecting groove 10401; the upper surface of the second closing piece 104 is in contact with the lower surface of the first closing piece 103; the second connecting groove 10401 is connected to the first connecting groove 10301.

[0033] The liquid storage tank 3 is provided with a handle 3001 .

[0034] First, the patient opens the airtight cover 4, pours the liquid medicine into the liquid storage tank 3, and then closes the airtight cover 4. Subsequently, the patient wears the mask 6 on the face, and then starts the compressor 1 to generate airflow through the compressor 1, and transmits the airflow along the connecting tube 2, and then sprays it out from the nozzle of the connecting tube 2. The sprayed airflow will blow into the first guide tube 4006 liquid guide tube 4004 and flow upward, so that a low-pressure area is generated on the lower side of the first guide tube 4006 liquid guide tube 4004, so that the liquid medicine in the liquid storage tank 3 is sucked into the first guide tube 4006 liquid guide tube 4004 under the action of negative pressure, and after contacting with the airflow, it moves upward under the drive of the airflow. During the upward movement of the medicine liquid, the medicine liquid will hit the atomizing sheet 5, so that the medicine liquid is atomized into medicine mist after the impact, and then flows out from the channel between the first guide tube 4006 and the second guide tube 4007 to the liquid guide tube 4004 with the air flow, and continues to move upward along the liquid guide tube 4004 under the action of the air flow, so that the medicine mist passes through the first connecting groove 10301 and the second connecting groove 10401, and then enters the air outlet 4001, and enters the connecting port 4002 after passing through the one-way diaphragm 7, and then continues to move upward, is sprayed out from the mask 6, and enters the patient's body with the patient's breathing, thereby achieving treatment of the patient.

[0035] When the patient uses the medical nebulizer, based on the view from top to bottom, the patient can rotate the rotating block 101 clockwise, thereby driving the fixing rod 102, the first closing piece 103 and the first connecting groove 10301 to rotate clockwise, so that the first connecting groove 10301 and the second connecting groove 10401 are misaligned, thereby reducing the drug mist passing through the first connecting groove 10301 and the second connecting groove 10401, thereby achieving the adjustment of the drug mist flow rate.

[0036] When the patient is breathing or exhaling rapidly, the patient's exhalation will blow the drug mist back into the connection port 4002, or even pass through the air outlet 4001 into the catheter 4004, causing reflux. Therefore, in normal use, the one-way diaphragm 7 is pushed by the upward flowing drug mist to be in an upwardly opened state. When the patient blows the drug mist back to the connection port 4002, the reflux drug mist (the airflow generated by the drug mixed with the patient's exhalation) pushes the one-way diaphragm 7 downward, and the reflux drug mist is greater than the thrust of the upward flowing drug mist on the one-way diaphragm 7. At this time, the one-way diaphragm 7 is closed, thereby blocking the reflux drug mist. The one-way diaphragm 7 is used to block the medicine mist flowing upward, thereby avoiding contamination of the medicine liquid in the medical nebulizer and affecting the sanitation and safety of the medical nebulizer. The one-way diaphragm 7 is used to block the upward-flowing medicine mist, thereby avoiding waste of the upward-flowing medicine mist. When the one-way diaphragm 7 is closed due to the influence of the reflux medicine mist, the reflux medicine mist will enter the collecting chamber 4003 along the hollow guide plate 4005, and the reflux medicine will condense and accumulate into medicine liquid in the collecting chamber 4003 for collection. Subsequently, when the patient finishes using the medical nebulizer, the patient pulls out the plug on the sealed cover 4, and then pours out the medicine liquid in the collecting chamber 4003, thereby cleaning the medicine liquid in the collecting chamber 4003.

[0037] When the one-way diaphragm 7 is closed and blocks the upward-flowing medicine mist, the upward-flowing medicine mist continues to be generated, and thus the pressure in the air outlet 4001 and the liquid guiding tube 4004 gradually increases, resulting in that when the refluxed medicine mist gradually dissipates (when the refluxed medicine mist enters the collecting chamber 4003), the pressure in the air outlet 4001 and the liquid guiding tube 4004 gradually increases. Therefore, when the refluxed medicine mist is less than the thrust of the upward-flowing medicine mist on the one-way diaphragm 7, the upward-flowing medicine mist will produce a rapid medicine mist under the action of pressure, and pass through the connecting port 4002 and the rubber tube 8 at a faster speed, and then be blown out to the mask 6, making the patient feel uncomfortable when caught off guard. Therefore, when the patient exhales or exhales rapidly, the one-way diaphragm 7 is closed, causing the pressure in the air outlet 4001 to increase, the medicine mist pressure in the air outlet 4001 will push the pressure plate 202 to move left, causing the air in the connecting tube 201 to be compressed and gradually The air enters the airbag 9 along the air supply pipe 204, causing the airbag 9 to expand inward, so that the lower side of the rubber tube 8 is squeezed by the airbag 9, causing the diameter of the lower end of the rubber tube 8 to gradually decrease. When the diameter of the lower end of the rubber tube 8 is smaller than the diameter of the upper end, the rubber tube 8 will become an inverted truncated cone. As a result, when the above-mentioned rapid drug mist passes through the rubber tube 8, the flow rate is reduced, thereby reducing the flow rate of the above-mentioned drug mist blowing into the mask 6, avoiding the above-mentioned drug mist flow rate being too large, causing the patient to feel uncomfortable and affecting the patient's use effect. Subsequently, when the pressure in the air outlet 4001 gradually returns to the normal use state, the pressure on the right side of the pressure plate 202 will gradually decrease, so that the compressed air on the left side of the pressure plate 202 pushes the pressure plate 202, causing the pressure plate 202 to move to the right, thereby causing the compressed air in the airbag 9 to gradually return to its original state, move to the initial position, and block the pressure plate 202 through the retaining ring 203 to prevent the pressure plate 202 from escaping from the connecting tube 201.

[0038] When a patient uses the present invention, the handle 3001 provided on the liquid storage tank 3 facilitates the patient to hold the liquid storage tank 3 .

[0039] The one-way diaphragm 7 is arranged to be inclined toward the hollow guide plate 4005; since the medicine mist also contacts the one-way diaphragm 7 when passing through the hollow guide plate 4005 and enters the collecting chamber 4003, part of the medicine liquid will also condense on the one-way diaphragm 7. By making the one-way diaphragm 7 inclined toward the hollow guide plate 4005, it is convenient for the medicine liquid condensed on the one-way diaphragm 7 to flow toward the hollow guide plate 4005 and then enter the collecting chamber 4003.

[0040] The rotating block 101 is provided with a plurality of semicircular grooves 10101, which are used to increase the roughness of the surface of the rotating block 101, thereby increasing the friction between the patient's fingers and the rotating block 101 and preventing slipping.

[0041] The pressure sheet 202 is convex to the left in the middle; when the pressure sheet 202 is pushed to the left by the pressure in the air outlet 4001, the pressure is concentrated in the middle of the pressure sheet 202, making it easier for the pressure sheet 202 to move to the right, which is convenient for the expansion of the airbag 9.

[0042] Example 2

[0043] On the basis of Example 1, Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, it also includes a dispersion rod 301; the dispersion rod 301 is fixedly connected to the connection port 4002 of the sealing cover 4; when the one-way diaphragm 7 is closed and the one-way diaphragm 7 blocks the upward flowing medicine mist, the upward flowing medicine mist will produce a rapid medicine mist under the action of pressure, and the solubility of the medicine mist will also increase. Therefore, in the process of the rapid medicine mist moving upward along the rubber tube 8, the rapid medicine mist is dispersed by the dispersion rod 301, thereby reducing the concentration of the medicine mist, avoiding excessive concentration of the medicine mist, causing discomfort to the patient, and affecting the patient's use effect. At the same time, the dispersion rod 301 is also used to further reduce the flow rate of the upward flowing medicine mist.

[0044] It also includes a hose 401 and an annular frame 402; when the mask 6 is not connected to the connecting port 4002 of the sealed cover 4 in Example 1, the connecting port 4002 of the sealed cover 4 is connected with a hose 401; the other end of the hose 401 is connected to the mask 6; the annular frame 402 is fixedly connected to the lower side of the liquid storage tank 3; when the patient lies on the bed, the patient can place the liquid storage tank 3 vertically on the table through the annular frame 402, and then wear the mask 6 on the face, so that the medicine mist passes through the connecting port 4002 and then sprays out from the mask 6 along the hose 401, so as to avoid the liquid storage tank 3 tilting when the patient lies on the bed, making it difficult to completely atomize the medicine liquid in the liquid storage tank 3, and causing residual medicine liquid in the liquid storage tank 3, which affects the atomization of the medicine liquid by the medical nebulizer.

[0045] It also includes a bracket 501; the bracket 501 is fixedly connected to the left side of the compressor 1; when the patient is busy and does not use the medical nebulizer temporarily, the patient can place the handle 3001 on the liquid storage tank 3 on the bracket 501, thereby placing the liquid storage tank 3 on the bracket 501, so as to temporarily store the liquid storage tank 3, which is convenient for the patient to reuse after returning.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A medical atomizer for preventing gas backflow contamination, characterized by: The invention comprises a compressor (1); a connecting pipe (2) connected to the compressor (1); a nozzle is arranged at the other end of the connecting pipe (2); a liquid storage tank (3) is detachably connected to the other end of the connecting pipe (2); the nozzle arranged at the other end of the connecting pipe (2) is located in the liquid storage tank (3); a sealing cover (4) is screwed onto the liquid storage tank (3); an air outlet (4001) is arranged on the sealing cover (4); a connecting port (4002) is arranged on the sealing cover (4), the air outlet (4001) is communicated with the connecting port (4002); the connecting port (4002) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4003) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4004) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4005) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4006) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4007) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4008) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4009) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4001) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4001) of the sealing cover (4) is connected to the liquid storage tank (3); a connecting port (4002 ... sealing cover (4) is screwed onto the liquid storage tank ( 2) is plugged with a mask (6); a liquid guide tube (4004) is arranged on the sealing cover (4), the liquid guide tube (4004) is located in the liquid storage tank (3), and the liquid guide tube (4004) is connected to the air outlet (4001); a first guide tube (4006) is arranged at the lower part of the liquid guide tube (4004), and the first guide tube (4006) is located outside the nozzle of the connecting tube (2); a second guide tube (4007) is arranged in the liquid guide tube (4004), and the second guide tube (4007) is located above the first guide tube (4006); the second guide tube (4007) is detachably connected to an atomizing sheet (5), the atomizing sheet (5) being located above the first guide tube (4006); and further comprising a one-way diaphragm (7); a hollow guide plate (4005) for guiding the backflow medicine mist is provided on the connection port (4002) of the sealed cover (4); a collecting chamber (4003) for collecting the backflow medicine mist is provided on the sealed cover (4); the collecting chamber (4003) is connected to the connection port (4002) through the hollow guide plate (4005); a connecting port (4002) of the sealed cover (4) is connected to a connecting port (4002) for collecting the backflow medicine mist; A one-way diaphragm (7) is provided to prevent the medicine mist from flowing back into the liquid storage tank (3), and the upper surface of the one-way diaphragm (7) is located at the hollow guide plate (4005); a rubber tube (8) for reducing the flow rate of the rising medicine mist is detachably connected to the connection port (4002) of the sealing cover (4); the rubber tube (8) is located above the one-way diaphragm (7); an air bag (9) for changing the diameter of the tube mouth of the rubber tube (8) is connected to the lower side of the rubber tube (8); a flow limiting component is arranged in the sealing cover (4), and the flow limiting component is used to control the expansion of the air bag (9) to change the diameter of the tube mouth of the rubber tube (8).

2. A medical atomizer for preventing gas backflow contamination according to claim 1, characterized in that: The flow limiting component comprises a connecting tube (201); the connecting tube (201) is fixedly connected to and communicated with the air outlet (4001) of the sealing cover (4); a pressure plate (202) is slidably connected to the connecting tube (201); a retaining ring (203) is fixedly connected to the right side of the connecting tube (201); the left side of the connecting tube (201) is communicated with an air supply pipe (204); and the other end of the air supply pipe (204) is communicated with the air bag (9).

3. A medical atomizer for preventing gas backflow contamination according to claim 1, characterized in that: The invention also comprises an adjusting component, which comprises a rotating block (101); the rotating block (101) is rotatably connected to the upper side of the sealed cover (4); a fixing rod (102) is fixedly connected to the lower side of the rotating block (101); the fixing rod (102) passes through the sealed cover (4) and is located in the liquid guiding tube (4004); a first sealing piece (103) is fixedly connected to the lower side of the fixing rod (102); a first connecting groove (10301) is provided on the first sealing piece (103); a second sealing piece (104) is fixedly connected to the liquid guiding tube (4004) of the sealed cover (4); a second connecting groove (10401) is provided on the second sealing piece (104); the upper surface of the second sealing piece (104) is in contact with the lower surface of the first sealing piece (103); and the second connecting groove (10401) is connected to the first connecting groove (10301).

4. A medical atomizer for preventing gas backflow contamination according to claim 1, characterized in that: The liquid storage tank (3) is provided with a handle (3001).

5. The medical atomizer for preventing gas backflow contamination according to claim 1, characterized in that: The one-way diaphragm (7) is arranged to be inclined toward the hollow guide plate (4005).

6. A medical atomizer for preventing gas backflow contamination according to claim 3, characterized in that: A plurality of semicircular grooves (10101) are provided on the rotating block (101).

7. A medical atomizer for preventing gas backflow contamination according to claim 2, characterized in that: The pressure plate (202) is arranged with its middle portion convex toward the left.

8. The medical atomizer for preventing gas backflow contamination according to claim 1, characterized in that: It also includes a dispersion rod (301); the dispersion rod (301) is fixedly connected in the connection port (4002) of the sealing cover (4).

9. A medical atomizer for preventing gas backflow contamination according to claim 8, characterized in that: It also includes a hose (401); when the mask (6) is not connected to the connection port (4002) of the sealing cover (4), the hose (401) is connected to the connection port (4002) of the sealing cover (4); the other end of the hose (401) is connected to the mask (6); and the lower side of the liquid storage tank (3) is fixedly connected to an annular frame (402).

10. The medical atomizer for preventing gas backflow contamination according to claim 1, characterized in that: It also includes a bracket (501); the bracket (501) is fixedly connected to the left side of the compressor (1).

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