TWI704014B - Mouthpiece of inhaler and inhaler having the same - Google Patents

Abstract

An inhaler includes a housing, a storage container, a pressure assembly, a nozzle, and a mouthpiece. The housing includes an upper housing and a lower housing. The upper housing is rotatable relative to the lower housing. The storage container is disposed in the housing and is capable of storing liquid. The pressure assembly is disposed in the housing and one end of the pressure assembly extends into the storage container. The nozzle is connected to the other end of the pressure assembly. The mouthpiece is connected to the upper housing and the nozzle is accommodated in the mouthpiece. The mouthpiece includes a mouthpiece connection portion, a mouthpiece inner cylinder, and a mouthpiece outer cylinder. The mouthpiece connection portion is capable of connecting the mouthpiece to the upper housing. The mouthpiece inner cylinder is disposed at the center of the mouthpiece connection portion and has openings at both ends thereof. The mouthpiece outer cylinder is disposed outside the mouthpiece inner cylinder and on the same side of the mouthpiece inner cylinder as the mouthpiece connection portion. The mouthpiece outer cylinder has at least one air inlet. The present disclosure also provides an inhaler mouthpiece.

Description

Inhaler mouthpiece and inhaler

The present invention relates to an inhaler, in particular to an inhaler mouthpiece and an inhaler using the inhaler mouthpiece.

Aerosolizers, also known as nebulizers or nebulizers, are used to assist patients in administering drugs by inhalation. The liquid medicine is atomized to help the user get effective inhalation efficiency and absorption effect. The size of the above-mentioned fine particles can be adjusted according to different respiratory conditions, such as chronic obstructive pulmonary disease or asthma, or corresponding to the type of liquid medicine itself. However, because the flow resistance at the nozzle of the inhaler is difficult to control, the patient inhales the atomized medicine too quickly and the medicine cannot be fully absorbed.

Therefore, the inventor believes that the above-mentioned shortcomings can be improved, and with great concentration of research and the application of scientific principles, we finally propose an invention with reasonable design and effective improvement of the above-mentioned defects.

In order to solve the above technical problems, one aspect of the present invention proposes an inhaler mouthpiece, the inhaler mouthpiece comprising: a mouthpiece connecting portion, the mouthpiece connecting portion for connecting the mouthpiece to the inhaler body; a mouthpiece inner tube , The inner tube of the mouthpiece is set at the center of the mouthpiece connecting part and both ends are open; and the outer tube of the mouthpiece, the mouthpiece outer tube is arranged on the outside of the mouthpiece inner tube and is located on the same side of the mouthpiece connecting part , The outer cylinder of the mouthpiece is provided with at least one air inlet.

In one embodiment, the height of the inner tube of the mouthpiece in the height direction of the inhaler is smaller than the height of the outer tube of the mouthpiece.

In another embodiment, each of the at least one air inlet has an area of the first surface located on the inner surface of the mouthpiece outer cylinder than the area of the second surface located on the outer surface of the mouthpiece outer cylinder.

Further, in the section of the mouthpiece outer cylinder perpendicular to the axial direction of the mouthpiece outer cylinder and passing through the two ends of the at least one air inlet, the line from the center point of the section to the two ends of the first surface is formed The included angle is between 35 degrees and 45 degrees, and the included angle formed by the line connecting the center point of the cross section to the two ends of the second surface is between 55 degrees and 65 degrees.

Further, the angle formed by the line from the center point of the cross section to the two ends of the first surface is 40 degrees, and the angle formed by the line from the center point of the cross section to the two ends of the second surface is 60 degrees.

In one embodiment, the first surface area is between 22.00mm ² to 23.00mm ^2, the second surface area is between 40.00mm ² to 42mm ^2.

Further, the area of the first surface is 22.77 mm ² , and the area of the second surface is 40.98 mm ² .

In one embodiment, in each of the at least one air inlet: the flow resistance between the first surface and the second surface and near the first surface is 62600-86131 Pa ^1/2 s/m ³ , near the second surface The flow resistance at the surface is 32279-76286Pa ^1/2 s/m ³ .

Another aspect of the present invention provides an inhaler including: a housing, the housing includes an upper housing and a lower housing connected to the upper housing, and the upper housing can rotate relative to the lower housing; storage; The container, the storage container is arranged in the housing, and the storage container is used to store liquid; the pressure assembly, the pressure assembly is arranged in the housing and one end of the pressure assembly extends into the storage container to obtain the liquid stored in the storage container through the pressure assembly and Pressurize the acquired liquid; the nozzle, the nozzle is connected with the other end of the pressure assembly to atomize the acquired liquid in the pressure assembly; and the blowing nozzle, the blowing nozzle is connected with the upper shell and the nozzle is accommodated in the blowing nozzle , Characterized in that the mouthpiece includes: a mouthpiece connecting part, the mouthpiece connecting part is used to connect the mouthpiece to the upper shell; the mouthpiece inner tube, the mouthpiece The tube is arranged in the center of the mouthpiece connecting part and is open at both ends for accommodating the nozzle; and the mouthpiece outer tube, which is arranged on the outside of the mouthpiece inner tube and is located on the same side of the mouthpiece connecting part as the mouthpiece inner tube On the side, the outer cylinder of the mouthpiece is provided with at least one air inlet.

In one embodiment, the height of the inner tube of the mouthpiece in the height direction of the inhaler is smaller than the height of the outer tube of the mouthpiece.

In one embodiment, at least one air inlet is arranged along the same cross section of the outer cylinder of the mouthpiece.

In one embodiment, each of the at least one air inlet has an area of the first surface located on the inner surface of the mouthpiece outer cylinder smaller than the area of the second surface located on the outer surface of the mouthpiece outer cylinder.

Further, in the section of the mouthpiece outer cylinder perpendicular to the axial direction of the mouthpiece outer cylinder and passing through the two ends of the at least one air inlet, the line from the center point of the section to the two ends of the first surface is formed The included angle is between 35 degrees and 45 degrees, and the included angle formed by the line connecting the center point of the cross section to the two ends of the second surface is between 55 degrees and 65 degrees.

Further, the angle formed by the line from the center point of the cross section to the two ends of the first surface is 40 degrees, and the angle formed by the line from the center point of the cross section to the two ends of the second surface is 60 degrees.

In one embodiment, the first surface area is between 22.00mm ² to 23.00mm ^2, the second surface area is between 40.00mm ² to 42mm ^2.

Further, the area of the first surface is 22.77 mm ² , and the area of the second surface is 40.98 mm ² .

In one embodiment, in each of the at least one air inlet: the flow resistance between the first surface and the second surface and near the first surface is 62600-86131 Pa ^1/2 s/m ³ , near the second surface The flow resistance at the surface is 32279-76286Pa ^1/2 s/m ³ .

Further, when the flow rate at the mouthpiece is the maximum, the spray flow rate at the top of the mouthpiece is between 1.04 and 2.43 m/s, and the gas flow rate at the air inlet is between 6.7 and 19.4 m/s.

In one embodiment, the pressure assembly includes: a biasing member, the biasing member is arranged below Inside the housing; a holding part, the holding part is arranged in the upper housing for holding the storage container, and the holding part is connected with the upper end of the biasing part; a transfer tube, one end of the transfer tube extends through the holding part into the storage container, and the other end Connected to the nozzle; and the pump chamber, which is arranged in the transfer pipe for temporary storage of the liquid pressed into the pump chamber.

Further, the biasing member includes: a biasing chamber, which is held in the lower housing; and a biasing spring, which is provided in the biasing chamber and can be axially compressed by rotating the lower housing to The holder is driven to move downward along the height direction of the inhaler.

In one embodiment, the pressure assembly further includes a check valve, which is provided in the transfer pipe to prevent the liquid in the pump chamber from returning.

The mouthpiece of the inhaler according to the present invention and the inhaler using the mouthpiece of the inhaler have high flow resistance, and can assist the user to slowly and evenly inhale the atomized liquid, thereby achieving a better absorption effect.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention, but these descriptions and drawings are only used to illustrate the present invention, and do not make any claims about the protection scope of the present invention. limit.

1: shell

11: Upper shell

12: Lower shell

2: storage container

3: Pressure components

31: Offset room

32: Bias spring

33: Holder

34: Conveyor

35: filter device

4: nozzle

5: mouthpiece

51: mouthpiece connection

52: mouthpiece inner tube

53: mouthpiece outer tube

54: air inlet

A, B: included angle

W1, W2: distance

Fig. 1 is a schematic structural diagram of an inhaler according to an exemplary embodiment of the present invention; Fig. 2 is a perspective view of a mouthpiece of an inhaler according to an exemplary embodiment of the present invention; Fig. 3 is the inhaler shown in Fig. 1 Side view of the mouthpiece; Figure 4 is an exploded schematic view of the mouthpiece and nozzle part of the inhaler according to an embodiment of the present invention; Figure 5 is the mouthpiece when the user uses the inhaler disclosed in the present invention in a slow and deep inhalation mode Figure 6 shows the flow velocity change graph at the center point of the air inlet when the user uses the inhaler disclosed in the present invention in a slow deep inhalation mode.

Please refer to Figures 1 to 6, which are embodiments of the present invention. It should be noted that the related quantities and appearances mentioned in the accompanying drawings in this embodiment are only used to specifically illustrate the implementation of the present invention, so that To understand the content of the present invention, not to limit the protection scope of the present invention.

The structure of the mouthpiece of the inhaler and the inhaler according to the present invention will be described in detail below with reference to the accompanying drawings.

1, the inhaler according to the present invention includes a housing 1 (including an upper housing 11 and a lower housing 12), a storage container 2, a pressure assembly 3, a nozzle 4, and a mouthpiece 5, wherein the storage container 2 and the pressure assembly 3 They are all set in the housing 1, the nozzle 4 is connected to the storage container 2 through the pressure assembly 3, and the outlet of the nozzle 4 is matched with the blowing nozzle 5.

The housing 1 is the main body of the inhaler and is used to accommodate other components of the inhaler. The housing 1 includes an upper housing 11 and a lower housing 12 connected to the upper housing 11, wherein the upper housing 11 can rotate relative to the lower housing 12 to drive the pressure assembly 3 to compress and transfer the solution in the storage container 2 To nozzle 4. In one embodiment, the housing 1 has a cylindrical shape. However, those skilled in the art should understand that the housing 1 may also have any other shape that is convenient for the user to hold. In addition, the housing 1 can be made of any material commonly used in the art, and there is no specific limitation here. The storage container 2 is arranged inside the housing 1 and is used to store a liquid 21, such as a liquid medicine. The pressure component 3 is arranged in the housing 1 and one end of the pressure component 3 extends into the storage container 2 and the other end is connected to the nozzle 4 to transfer the liquid 21 stored in the storage container 2 to the nozzle 4 through the pressure component 3. The nozzle 4 connected to the other end of the pressure assembly 3 can atomize the liquid 21 obtained from the pressure assembly 3, and the atomized liquid 21 passes through the mouthpiece 5 for the user to suck.

2 and 3, the mouthpiece 5 of the inhaler includes a mouthpiece connecting part 51, a mouthpiece inner tube 52, and a mouthpiece outer tube 53, wherein the mouthpiece inner tube 52 and the mouthpiece outer tube 53 are both set at the mouthpiece connecting part 51, and the mouthpiece outer tube 53 is arranged outside the mouthpiece inner tube 52. The mouthpiece connecting portion 51 is the main part of the mouthpiece 5, which can connect the mouthpiece 5 to the inhaler 上壳11。 On the housing 11. The mouthpiece inner cylinder 52 is arranged in the center of the mouthpiece connecting portion 51 and is open at both ends. When the mouthpiece connecting portion 51 is connected to the upper housing 11, the nozzle 4 of the inhaler is inserted from the upper portion of the mouthpiece 5 into the mouthpiece The barrel 52 is connected to the pressure assembly 3 (as shown in Figure 4). The mouthpiece outer tube 53 and the mouthpiece inner tube 52 are located on the same side of the mouthpiece connecting portion 51, and the mouthpiece outer tube 53 is provided with at least one air inlet 54 to blow air into the mouthpiece 5 when the patient uses the inhaler, Assist the flow of liquid spray. In one embodiment, the mouthpiece connecting portion 51, the mouthpiece inner tube 52 and the mouthpiece outer tube 53 constituting the mouthpiece 5 are integrally formed.

Hereinafter, the method of using the inhaler according to the present invention will be described with reference to FIGS. 1 and 2. Open the upper shell 11 and the lower shell 12, connect the storage container 2 to the lower end of the pressure assembly 3; connect the upper shell 11 and the lower shell 12; rotate the lower shell 12 to compress the pressure assembly 3, the pressure assembly 3 will The liquid 21 is delivered to the upper end of the pressure assembly 3 and ejected from the nozzle 4. When the user sucks the spray from the mouthpiece 5, the air entering from the mouthpiece outer tube 53 of the mouthpiece 5 forms a bypass gas, allowing the user to Absorb the spray more smoothly. Therefore, the inhaler according to the present invention has a simple structure and achieves a better absorption effect through the integrally formed mouthpiece 5 part.

Continuing to refer to FIGS. 1 to 3, the height of the mouthpiece inner tube 52 in the height direction of the inhaler is smaller than the height of the mouthpiece outer tube 53. When the nozzle 4 of the inhaler is held in the mouthpiece inner cylinder 52, the height of the nozzle 4 is lower than the height of the mouthpiece outer cylinder 53, so that the air entering through at least one air inlet 54 on the mouthpiece outer cylinder 53 is restricted. The total flow resistance at the outlet of the mouthpiece 5. In order to maintain uniform air intake in the mouthpiece outer cylinder 53, at least one air inlet 54 is arranged along the same cross section of the mouthpiece outer cylinder 53.

2, each of the at least one air inlet 54 provided on the mouthpiece outer tube 53 has an area of the first surface of the inner surface of the mouthpiece outer tube 53 that is smaller than the area of the first surface of the outer surface of the mouthpiece outer tube 53 The area of the two sides, so that a slope is formed between the first surface and the second surface, reduces the resistance of external air entering the inside of the blowing nozzle 5. In one embodiment, the first surface area is between 22.00mm ² to 23.00mm ^2, the second surface area is between 40.00mm ² to 42mm ^2. Preferably, the area of the first surface is 22.77 mm ² , and the area of the second surface is 40.98 mm ² . 2, in the cross section of the nozzle outer tube 53 perpendicular to the axial direction of the nozzle outer tube 53 and passing through the two ends of the at least one air inlet 54, the center point of the cross section to the two ends of the first surface The included angle A formed by the connecting line is between 35 degrees and 45 degrees, and the included angle B formed by the connecting line to the two ends of the second surface is between 55 degrees and 65 degrees. Preferably, the included angle A formed by the line from the center point of the cross section to the two ends of the first surface is about 40 degrees, and the included angle B formed by the line to the two ends of the second surface is about 60 degrees. 3, in one embodiment, the distance W1 between the two ends of the first surface in the transverse direction is between 11.2 mm and 13.2 mm, preferably approximately 12.2 mm. The distance W2 between the two ends of the second surface in the transverse direction is between 5.3 mm and 7.3 mm, preferably about 6.3 mm.

1, in an embodiment of the present invention, the pressure assembly 3 includes a biasing member, a holding member 33, a transfer pipe 34, and a pump chamber (not shown in the figure).

The biasing member is arranged in the lower housing 12 and can be compressed when the lower housing 12 rotates relative to the upper housing 11. In one embodiment, the biasing member may include a biasing chamber 31 and a biasing spring 32, wherein the biasing chamber 31 is held in the lower housing 12 and the biasing spring 32 is provided in the biasing chamber 31. In this way, by rotating the lower housing 12, the bias spring 32 can be compressed along the axial direction of the bias spring 32, thereby driving the holder 33 to move downward along the height direction of the inhaler. The holding member 33 is provided in the upper casing 11 for holding the storage container 2, and the holding member 33 is connected with the upper end of the biasing member. The transfer tube 34 is used to transfer the liquid 21 in the storage container 2, one end of which extends into the storage container 2 through the holder 33 and the other end is connected to the nozzle 4. In this way, when the lower housing 12 is rotated, the biasing member is compressed, thereby pushing the holding member 33 downward to compress the storage container 2; after the storage container 2 is compressed, the liquid 21 stored therein flows upward through the transfer tube 34; When the biasing member is released, the resilient force of the biasing member sends the liquid 21 temporarily stored in the upper part of the conveying tube 34 into the nozzle 4 with atomization; further, the atomized liquid 21 is sprayed out through the nozzle 4 and sucked by the user. Preferably, the pressure assembly 3 further includes a check valve. A check valve is provided in the transfer pipe 34 to prevent the liquid 21 from returning. In an embodiment, the pressure assembly 3 further includes a filter device 35, which is arranged near the end of the transfer tube 34 connected to the nozzle 4 to further filter the liquid 21. In addition, so The pump chamber is provided in the transfer pipe 34 for temporarily storing the liquid pressed into the pump chamber.

The following describes the effects of the mouthpiece 5 of the inhaler according to the present invention and the inhaler using the mouthpiece 5 in conjunction with test data, wherein the mouthpiece 5 of the inhaler has one or two air inlets 54.

A flow analyzer, aspirator pump and a pressure gauge are used to measure the flow resistance of the inhaler air inlet 54. Connect the suction pump to the suction hole of the flow analyzer, and adjust the flow rate of the suction pump to 38.8L/min; use a pipe to connect the mouthpiece 5 to the flow analyzer, and place the pressure gauge in the pipe to measure Pressure difference (that is, the pressure difference before and after the air enters the air inlet 54 of the mouthpiece 5); use the formula (1) to calculate the flow resistance:

Among them, R is the flow resistance at the air inlet 54, △P is the pressure difference between the pressure gauge and the ambient air pressure, and V is the flow rate.

After measurement, the flow resistance of the mouthpiece 5 with a single air inlet 54 is approximately 40662 Pa ^1/2 s/m ³ ; the flow resistance of the mouthpiece 5 with two air inlets 54 is approximately 21600 Pa ^1/2 s/m ³ .

When using the inhaler, when the user uses the inhaler in a slow and deep (SD) manner, the flow rate at the mouthpiece 5 reaches a peak of 41.2 liters/min at about 1.81 second.

At the same time, referring to Table 1, use the COMSOL Multiphysics 5.3a software to simulate the flow meter to measure the gas flow velocity at the nozzle 4 and the blowing nozzle 5. When the flow rate at the mouthpiece 5 is maximum (ie, 1.81 seconds), the spray flow rate at the mouthpiece 5 is between 1.04 and 2.43 m/s, and the gas velocity at the air inlet 54 is between 6.7 and 19.74 m/s. .

In another flow rate measurement experiment, the flow rate at the center point of the top of the most blowing nozzle 5 was measured, and the measurement result is shown in FIG. 5. It can be seen from Figure 5 that when the user breathes slowly and deeply, the flow velocity at the center point of the top of the mouthpiece 5 reaches the maximum value of 2.43 m/s at about 1.81s, and then the flow velocity at the center point of the top of the mouthpiece 5 Decrease to 0 in a parabolic manner.

In another flow rate measurement experiment, the air inlet velocity at the center point of the air inlet was measured, and the measurement result is shown in Figure 6. It can be seen from Figure 6 that when the user breathes slowly and deeply, the gas flow velocity at the center point of the air inlet reaches the maximum value of 13.24 m/s at about 1.81s, and then the gas flow velocity at the center point of the air inlet is Reduce to zero parabolicly.

The above are only preferred and feasible embodiments of the present invention, and are not used to limit the scope of protection of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the protection scope of the claims of the present invention. .

1‧‧‧Shell

11‧‧‧Upper shell

12‧‧‧Lower shell

2‧‧‧Storage container

3‧‧‧Pressure components

31‧‧‧offset room

32‧‧‧Offset spring

33‧‧‧Retainer

34‧‧‧Transport Pipe

35‧‧‧Filtering device

4‧‧‧Nozzle

5‧‧‧Blow mouth

Claims (18)

A mouthpiece for an inhaler, comprising: a mouthpiece connecting portion for connecting the mouthpiece to the inhaler body; a mouthpiece inner tube, the mouthpiece inner tube being arranged at the mouthpiece connection The center of the part and both ends are open; and the mouthpiece outer cylinder, the mouthpiece outer cylinder is arranged on the outside of the mouthpiece inner cylinder and is located on the same side of the mouthpiece connecting portion as the mouthpiece inner cylinder, so The mouthpiece outer cylinder is provided with at least one air inlet; wherein each of the at least one air inlet has an area of the first surface of the inner surface of the mouthpiece outer cylinder smaller than that of the mouthpiece outer cylinder The area of the second surface of the outer surface, so that a slope is formed between the first surface and the second surface. The inhaler mouthpiece according to claim 1, wherein the height of the mouthpiece inner tube in the height direction of the inhaler is smaller than the height of the mouthpiece outer tube. The inhaler mouthpiece according to claim 1, wherein the cross section of the mouthpiece outer cylinder perpendicular to the axial direction of the mouthpiece outer cylinder and passing through both ends of the at least one air inlet Inside, the angle formed by the line connecting the center point of the section to the two ends of the first surface is between 35 degrees and 45 degrees, and the line connecting the center point of the section to the two ends of the second surface is The formed angle is between 55 degrees and 65 degrees. The inhaler mouthpiece according to claim 3, wherein the angle formed by the line connecting the center point of the cross section to the two ends of the first surface is 40 degrees, and the center point of the cross section reaches the second surface. The angle formed by the lines connecting the two ends of the surface is 60 degrees. The requested item blow suction nozzle of claim 1, wherein said first surface area is between 22.00mm ² to 23.00mm ^2, area of the second surface is between 40.00mm ² to 42mm ^2. The mouthpiece of the inhaler according to claim 5, wherein the area of the first surface is 22.77 mm ² and the area of the second surface is 40.98 mm ² . The inhaler mouthpiece according to claim 1, wherein in each of the at least one air inlet: the flow between the first surface and the second surface and near the first surface The resistance is 62600-86131 Pa ^1/2 s/m ³ , and the flow resistance near the second surface is 32279-76286 Pa ^1/2 s/m ³ . An inhaler includes: a housing, the housing includes an upper housing and a lower housing connected to the upper housing, and the upper housing can rotate relative to the lower housing; a storage container, The storage container is arranged in the housing, the storage container is used to store liquid; a pressure assembly, the pressure assembly is arranged in the housing and one end of the pressure assembly extends into the storage container to pass The pressure component acquires the liquid stored in the storage container and pressurizes the acquired liquid; the nozzle is connected to the other end of the pressure component to atomize the acquired liquid in the pressure component The liquid; and a mouthpiece, the mouthpiece is connected with the upper housing and the nozzle is accommodated in the mouthpiece, characterized in that the mouthpiece includes: a mouthpiece connecting portion, the blowing The mouth connecting portion is used to connect the blowing nozzle to the upper housing; a blowing nozzle inner cylinder, the blowing nozzle inner cylinder is arranged in the center of the blowing nozzle connecting portion and has both ends open, for accommodating the nozzle And the mouthpiece outer cylinder, the mouthpiece outer cylinder is arranged on the outside of the mouthpiece inner cylinder and is located on the same side of the mouthpiece connecting portion with the mouthpiece inner cylinder, the mouthpiece outer cylinder is provided with At least one air inlet; wherein each of the at least one air inlet has an area of a first surface located on the inner surface of the mouthpiece outer cylinder smaller than that of a second surface located on the outer surface of the mouthpiece outer cylinder Area, so that a slope is formed between the first surface and the second surface. The inhaler according to claim 8, wherein the area of the first surface of each of the at least one air inlet located on the inner surface of the mouthpiece outer cylinder is smaller than that of the outer surface of the mouthpiece outer cylinder. The area of the second side. The inhaler according to claim 9, wherein, in a cross section of the mouthpiece outer cylinder perpendicular to the axial direction of the mouthpiece outer cylinder and passing through both ends of the at least one air inlet, The angle formed by the line from the center point of the section to the two ends of the first surface is between 35 degrees and 45 degrees, and the line from the center point of the section to the two ends of the second surface forms The included angle is between 55 degrees and 65 degrees. The inhaler according to claim 10, wherein the angle formed by the line connecting the center point of the cross section to the two ends of the first surface is 40 degrees, and the center point of the cross section to the second surface The angle formed by the connecting lines at both ends is 60 degrees. An inhaler according to a request item 9, wherein said first surface area is between 22.00mm ² to 23.00mm ^2, area of the second surface is between 40.00mm ² to 42mm ^2. The inhaler according to claim 12, wherein the area of the first surface is 22.77 mm ² and the area of the second surface is 40.98 mm ² . The inhaler according to claim 9, wherein in each of the at least one air inlet: the flow resistance between the first surface and the second surface and near the first surface is 62600-86131Pa ^1/2 s/m ³ , and the flow resistance near the second surface is 32279-76286 Pa ^1/2 s/m ³ . The inhaler according to claim 9, wherein: when the flow rate at the mouthpiece is maximum, the spray flow rate at the top of the mouthpiece is between 1.04 and 2.43 m/s, and the gas at the air inlet The flow velocity is between 6.7~19.4m/s. The inhaler according to claim 8, wherein the pressure assembly includes: a biasing member provided in the lower housing; a holding member, the holding member provided in the upper housing To hold the storage container, and the holding member is connected to the upper end of the biasing member; and A conveying pipe, one end of the conveying pipe extends into the storage container through the holder, and the other end is connected to the nozzle. The inhaler according to claim 16, wherein the biasing member includes: a biasing chamber, the biasing chamber is held in the lower housing; and a biasing spring, the biasing spring is provided at The bias chamber can be axially compressed by rotating the lower housing to drive the holder to move downward along the height direction of the inhaler. The inhaler according to claim 16, wherein the pressure assembly further includes a check valve, and the check valve is provided in the delivery pipe.

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