Dry powder sprayer

Abstract

The utility model discloses a dry powder sprayer which comprises a storage bottle, the storage bottle is connected with a spraying device, the storage bottle comprises an inner bottle and an outer bottle, the inner bottle is arranged in the outer bottle, a middle section is arranged between the outer side of a bottle opening of the inner bottle and the inner side of a bottle opening of the outer bottle, the inner bottle is movably connected with the middle section, and the middle section is detachably connected with the outer bottle. A sealing piston is arranged at the bottom of the inner bottle, a compressed air chamber is arranged between the sealing piston and the inner side of the bottom of the outer bottle, the outer side of the sealing piston is tightly attached to the inner side wall of a bottle body of the outer bottle, and an upper one-way valve allowing air to flow from the compressed air chamber to an inner cavity of the inner bottle in a one-way mode is arranged on the sealing piston. And a lower one-way valve allowing air to enter the compressed air chamber from the outside is arranged at the bottom of the outer bottle. According to the utility model, the part structure is simplified, and the production and installation are convenient; compressed air enters the inner bottle from the bottom, the dry powder stored in the inner bottle is stirred and blown away, and the dry powder can be prevented from being hardened in the inner bottle.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dry powder sprayer, in particular to a dry powder sprayer. BACKGROUND

[0002] The working principle of the sprayer is to increase the internal pressure of the sprayer by generating pressure inside or introducing pressure from outside, so as to spray different forms of substances from the sprayer, including gas, liquid, dry powder sprayer, etc.

[0003] The Chinese public patent "a disposable ear powder sprayer" with the publication number CN 209997007 U discloses a pump bottle, a cap is threadedly connected to the opening of the pump bottle, a pump body is fixedly connected to the inner wall bottom of the cap, a pressing head is movably inserted into the inner wall of the pump body, the top of the pressing head penetrates through the cap and extends to the outside of the cap, a limiting ring is fixedly connected to the inner wall of the pump body, the pressing head is slidably connected with the limiting ring, a first spring is arranged on the surface of the pressing head above the limiting ring, and an extrusion cavity is formed in the inner wall bottom of the pump body. After use, the new device is directly replaced, one person uses one tube, and cross infection is effectively controlled. The pressing head, the pump body and the powder outlet of the patent are all located at the opening of the pump bottle, so the connecting structure of the pressing head and the pump body is relatively complex due to the limited position of the bottle opening, and it is not suitable for all dry powder sprayers. UTILITY MODEL CONTENT

[0004] The present scheme provides a dry powder sprayer, which separately sets the pressing head and the pump body at the top end and the bottom end of the storage bottle, simplifies the structure of the parts, and is also convenient for production and installation.

[0005] The present scheme provides the following technical scheme:

[0006] A kind of dry powder sprayer, including storage bottle, storage bottle is connected spray device, the storage bottle includes inner bottle, outer bottle, the inner bottle is located in outer bottle, the inner bottle bottle mouth outside is equipped with middle section between outer bottle bottle mouth inside, the inner bottle and middle section are movably connected, the middle section and outer bottle are detachably connected, the inner bottle bottom is equipped with sealing piston, the sealing piston and outer bottle bottom inside are equipped with compressed air chamber between, the sealing piston outside is tightly attached to outer bottle body inside wall, the sealing piston is equipped with upper one-way valve, and the upper one-way valve allows air to flow from compressed air chamber to inner bottle inner cavity, the outer bottle bottom is equipped with lower one-way valve, and the lower one-way valve allows air to enter compressed air chamber from outside;The spray device includes pressing head, suction tube, reset device, the inner bottle bottle mouth is connected with pressing head, the pressing head is equipped with outlet passage, the suction tube is arranged in inner bottle and one end is connected with outlet passage, the other end extends to sealing piston, the reset device includes reset spring arranged in compressed air chamber, one end of the reset spring is connected with sealing piston, the other end is connected with outer bottle bottom inside;When pressing head is pressed down, the inner bottle is moved downwards, the inner bottle bottom is pressed against sealing piston, and reset spring is moved downwards, air in compressed air chamber is extruded, and pressure increases until upper one-way valve is opened to enter inner bottle, dry powder stored in inner bottle is pressed to enter outlet passage of pressing head through suction tube and is sprayed;After releasing pressing head, the reset spring drives sealing piston and inner bottle to move upwards, the compressed air chamber expands, air pressure decreases, and when outside air pressure is greater than air pressure in compressed air chamber, lower one-way valve is opened to enter compressed air chamber until pressure balance.

[0007] In the scheme, the pressing head is located at the position of the bottle mouth of the storage bottle, and the pump body (including the piston and the reset spring) is located at the position of the bottle bottom of the storage bottle. After being separated, the air inlet and the powder outlet are arranged at the two ends of the storage bottle respectively, without interfering with each other, and the structures of the components are relatively simple, so that the components are easy to manufacture and install. The inner bottle in the scheme is used for storing dry powder and transmitting the pressure of the pressing head. A user can hold the outer bottle with one hand and press the pressing head with the thumb or the other hand. At this time, the outer bottle and the middle section are stationary, the pressing head presses the inner bottle downward, and the inner bottle and the pressing head automatically rebound after being released, so that the dry powder can be continuously pressed out.

[0008] As a preferred scheme of the utility model, the pressing head includes a press head, a head cap, a cover, a gasket, and a coil. The inner bottle bottle mouth is provided with an external thread. The gasket is tightly attached to the inner bottle bottle mouth. The coil is connected with the inner bottle bottle mouth through a thread and tightly presses the cover on the gasket. The cover bottom is connected with the suction tube. The cover top is connected with the head cap. The head cap top is connected with the middle part of the press head. The press head outside is provided with a hollow ring, and the ring bottom is close to the inner bottle. The press head, the head cap, and the cover form an outlet passage. One end of the outlet passage is communicated with the suction tube, and the other end is communicated with the outside.

[0009] As the preferred scheme of the utility model, the cover includes the cover body of the section of the few characters, the cover body middle part is equipped with the through hole, the through hole edge extends downward and forms the outer plug pipe matched with the suction pipe, the through hole edge extends upward and forms the inner plug pipe matched with the head cap, the head cap is the pipe shape body of one end closed, the press head is connected outside the head cap, the outlet channel axis is perpendicular with the cover through hole axis, the press head top side is equipped with the nozzle, the outlet channel passes through the nozzle, the press head, the head cap, the inner plug pipe and the through hole, the suction pipe is communicated.

[0010] As the preferred scheme of the utility model, the bottle mouth and the bottle body are equipped with the upper layer step and the lower layer step connected with each other, the upper layer step outside wall is equipped with the external thread, the screw ring is connected with the external thread, the lower layer step outside wall is movably connected with the middle section, the press head ring bottom is arranged between the middle section and the screw ring, the press head ring is rotatably connected with the screw ring. The press head bottom is limited by the screw ring and cannot move up and down, but the press head can rotate, when the outlet channel on the press head is aligned with the outlet channel of the head cap, the dry powder can be sprayed, when not aligned, the dry powder cannot be sprayed, which plays the opening and closing role.

[0011] As the preferred scheme of the utility model, the outer plug pipe inside wall is equipped with one or more air vent grooves recessed into the wall, the air vent grooves are communicated with the inner bottle and the inner plug pipe. Dry powder is difficult to be stored, although the suction pipe is provided with multiple air suction holes, large dry powder particles cannot pass through, but small dry powder particles can pass through the air suction hole, the air vent groove can guide a part of the high pressure air in the inner bottle to be sprayed with the dry powder, the high pressure air guided out can accelerate the speed of the dry powder particles and make them collide with each other or the inner wall of the inner plug pipe, so that the dry powder particles can be scattered, and the dry powder can be sprayed in the powder state.

[0012] The press head of the scheme has three requirements, one is to seal the inner bottle, prevent the air leakage and cannot press the dry powder out, the second is to form the outlet channel, so that the dry powder can be smoothly sprayed, and the third is to simplify the structure, so that the production and installation are convenient, the press head is divided into multiple components, and the three requirements can be met after assembly.

[0013] As the preferred scheme of the utility model, the outer bottle bottom is provided with an embedded groove, a bottom cover and a mounting groove, the mounting groove is located in the middle of the outer bottle bottom and is recessed towards the inside of the outer bottle, the connecting position of the reset spring and the inner side of the outer bottle bottom is located outside the mounting groove, the center of the mounting groove is provided with a lower check valve, the bottom cover is arranged in the embedded groove, a plurality of air inlet holes are arranged on the bottom cover, and the bottom part of the embedded groove is provided with an air inlet channel which is communicated with the air inlet hole and the lower check valve. The lower check valve is shielded by the bottom cover, the lower check valve is prevented from being directly exposed, foreign matters are prevented from entering and blocking the lower check valve, a plurality of air inlet holes are arranged on the bottom cover, air can be supplemented into the compressed air chamber in time through the corresponding air inlet channel.

[0014] As the preferred scheme of the utility model, the middle part of the sealing piston is a funnel-shaped body, the bottom part of the funnel-shaped body is a funnel pipe, the middle part of the funnel pipe is provided with an upper check valve, the connecting position of the reset spring and the sealing piston is located outside the funnel pipe, the top circumference of the funnel-shaped body is provided with a downwardly extending annular flip cover, the middle part of the flip cover is provided with a piston step, the upper part of the piston step is clamped with the inner side wall of the inner bottle, and the lower part of the piston step is tightly sealed with the inner side wall of the outer bottle. The sealing piston can prevent the gas in the compressed air chamber from overflowing from the gap between the outer bottle and the inner bottle, the funnel-shaped body of the sealing piston can make the dry powder stored in the inner bottle flow to the funnel pipe, avoiding the problem that the dry powder in the common flat-bottomed bottle is difficult to be sprayed; the upper check valve is arranged in the middle part of the sealing piston, when the compressed air enters the inner bottle from the upper check valve, the dry powder stored in the inner bottle is also stirred and dispersed, preventing the dry powder from being hardened in the inner bottle and preventing the problem that the dry powder cannot flow.

[0015] As the preferred scheme of the utility model, the end of the suction pipe close to the sealing piston is provided with a suction pipe sleeve, the suction pipe sleeve comprises a sleeve pipe and a tapered plug pipe, the sleeve pipe is sleeved on the outside of the suction pipe, the tapered plug pipe is internally provided with a powder cavity communicated with the suction pipe, and a plurality of powder through holes are arranged on the wall of the tapered plug pipe. The suction pipe sleeve is sleeved on the pipe opening of the suction pipe, a plurality of powder through holes are arranged on the side of the plug pipe of the suction pipe sleeve, a large amount of compressed air is pressed into the inner part of the inner bottle, pressure is generated on the dry powder, so that the dry powder can be pressed into the suction pipe with relatively low pressure and sprayed out from the outlet channel; the suction pipe can also be divided into two sections, the upper part is a connecting section for connecting with the pressing head, and the lower part is an absorption section for absorbing dry powder, which can be distinguished and connected with each other according to different use purposes.

[0016] As the preferred scheme of the utility model, the outer side of the pressing head is provided with an outer cover, and the bottom part of the outer cover is connected with the outer side of the middle section.

[0017] Compared with the prior art, the beneficial effects of the utility model are that the pressing head and the pump body are arranged at the top end and the bottom end of the storage bottle respectively, the component structure is simplified, and production and installation are also convenient; compressed air enters the inner bottle from the bottom, has stirring and blowing effect on the dry powder stored in the inner bottle, and can prevent the dry powder from being hardened in the inner bottle. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the appearance of the utility model.

[0019] Figure 2 is a schematic view of the cross-sectional structure of the utility model.

[0020] Figure 3 is a schematic view of the cross-sectional structure of the utility model from another angle.

[0021] Figure 4 is a schematic view of the structure of the compressed air chamber exhaust dry powder of the utility model.

[0022] Figure 5 is a schematic view of the structure of the compressed air chamber intake of the utility model after the dry powder is sprayed.

[0023] Figure 6 is a schematic view of the cross-sectional structure of the inner bottle of the utility model.

[0024] Figure 7 is a schematic view of the cross-sectional structure of the sealing piston of the utility model.

[0025] Figure 8 is a schematic view of the cross-sectional structure of the pressing head of the utility model.

[0026] Figure 9 is a schematic view of the cross-sectional structure of the cover of the utility model.

[0027] Figure 10 is a schematic view of the external structure of the cover of the utility model.

[0028] In the drawing: 1, storage bottle 2, spray device 3, inner bottle 4, outer bottle

[0029] 5, middle section 6, sealing piston 7, compressed air chamber 8, upper one-way valve

[0030] 9, lower one-way valve 10, suction tube sleeve 11, outer cover 21, pressing head

[0031] 22, suction tube 23, reset device 24, outlet passage 31, upper step

[0032] 32, lower step 41, embedded groove 42, bottom cover 43, mounting groove

[0033] 61 funnel-shaped body 62 funnel tube 63 flip cap 64 piston step

[0034] 211 tip 212 tip cap 213 cap 214 gasket

[0035] 215 coil 216 ring 217 cap body 218 male spigot

[0036] 219 female spigot 220 vent slot 241 nozzle. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be apparently and completely described below in conjunction with the embodiments of the present application. Apparently, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] In order to facilitate the understanding of the present application, the present application will be described more fully below in conjunction with the relevant drawings. Several embodiments of the present application are given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0039] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present. As used herein the terms "vertical", "horizontal", "left", "right", and the like are merely used for the purpose of illustration.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] Referring to Figures 1-10 The present application provides a technical solution:

[0042] A dry powder sprayer includes a storage bottle 1 connected to a spraying device 2. The storage bottle 1 includes an inner bottle 3 and an outer bottle 4. The inner bottle 3 is disposed inside the outer bottle 4. A middle section 5 is provided between the outer side of the inner bottle 3 opening and the inner side of the outer bottle 4 opening. The inner bottle 3 and the middle section 5 are movably connected, and the middle section 5 and the outer bottle 4 are detachably connected. A sealing piston 6 is provided at the bottom of the inner bottle 3. A compressed air chamber 7 is provided between the sealing piston 6 and the inner side of the bottom of the outer bottle 4. The outer side of the sealing piston 6 is close to the inner wall of the outer bottle 4. The sealing piston 6 has a one-way function that allows air to flow from the compressed air chamber 7 into the inner bottle 3. The upper one-way valve 8 allows air to flow through the cavity, and the bottom of the outer bottle 4 is provided with a lower one-way valve 9 that allows air to enter the compressed air chamber 7 from the outside. The spray device 2 includes a pressing head 21, a suction tube 22, and a reset device 23. The mouth of the inner bottle 3 is connected to the pressing head 21, and the pressing head 21 is provided with an outlet channel 24. The suction tube 22 is located inside the inner bottle 3, with one end connected to the outlet channel 24 and the other end extending towards the sealing piston 6. The reset device 23 includes a reset spring located inside the compressed air chamber 7. One end of the reset spring is connected to the sealing piston 6, and the other end is connected to the inner side of the bottom of the outer bottle 4.

[0043] The pressing head 21 includes a pressing head 211, a cap 212, a sealing cap 213, a gasket 214, and a screw ring 215. The outer side of the bottle opening of the inner bottle 3 is provided with external threads. The gasket 214 is close to the bottle opening of the inner bottle 3. The screw ring 215 is connected to the bottle opening of the inner bottle 3 by threads and presses the sealing cap 213 onto the gasket 214. The bottom of the sealing cap 213 is connected to the straw 22, and the top of the sealing cap 213 is connected to the cap 212. The top of the cap 212 is connected to the middle of the pressing head 211. The outer side of the pressing head 211 is provided with a hollow ring 216, and the bottom of the ring 216 is close to the inner bottle 3. An outlet channel 24 is formed inside the pressing head 211, the cap 212, and the sealing cap 213. One end of the outlet channel 24 is connected to the straw 22, and the other end is connected to the outside.

[0044] The cap 213 includes a cap body 217 with a Z-shaped cross-section. The cap body 217 has a through hole in the middle. The edge of the through hole extends downward to form an external insertion tube 218 that cooperates with the straw 22. The edge of the through hole extends upward to form an internal insertion tube 219 that cooperates with the head cap 212. The head cap 212 is a tubular body closed at one end. The push head 211 is sleeved on the outside of the head cap 212. The axis of the outlet channel 24 is perpendicular to the axis of the through hole of the cap 213. The top side of the push head 211 has a nozzle 241. The outlet channel 24 passes through the nozzle 241, the push head 211, the head cap 212, the internal insertion tube 219, and communicates with the through hole and the straw 22.

[0045] The inner bottle 3 has an upper step 31 and a lower step 32 that are connected to each other between the bottle mouth and the body of the inner bottle 3. The outer wall of the upper step 31 has an external thread, and the screw ring 215 is connected to the external thread. The outer wall of the lower step 32 is movably connected to the middle section 5. The bottom of the ring 216 of the push head 211 is located between the middle section 5 and the screw ring 215. The ring 216 of the push head 211 is rotatably connected to the screw ring 215.

[0046] One or more air vent grooves 220 are formed in the inner wall of the outer adapter tube 218, and the air vent grooves 220 are recessed into the wall and communicate with the interior of the inner bottle 3 and the inner adapter tube 219.

[0047] The bottom of the outer bottle 4 is provided with an embedded groove 41, a bottom cover 42, and a mounting groove 43. The mounting groove 43 is located in the middle of the bottom of the outer bottle 4 and is recessed into the interior of the outer bottle 4. The connection between the reset spring and the inner side of the bottom of the outer bottle 4 is located outside the mounting groove 43. The center of the mounting groove 43 is provided with a lower one-way valve 9. The bottom cover 42 is arranged in the embedded groove 41. The bottom cover 42 is provided with a plurality of air inlet holes. The bottom of the embedded groove 41 is provided with an air inlet channel that communicates with the air inlet holes and the lower one-way valve 9.

[0048] The middle of the sealing piston 6 is a funnel-shaped body 61. The bottom of the funnel-shaped body 61 is a funnel tube 62. The middle of the funnel tube 62 is provided with an upper one-way valve 8. The connection between the reset spring and the sealing piston 6 is located outside the funnel tube 62. The top of the funnel-shaped body 61 is provided with a downwardly extending annular flip cover 63. The middle of the flip cover 63 is provided with a piston step 64. The upper part of the piston step 64 is clamped with the inner side wall of the inner bottle 3. The lower part of the piston step 63 is tightly sealed with the inner side wall of the outer bottle 4.

[0049] The end of the suction tube 22 close to the sealing piston 6 is provided with a suction tube sleeve 10. The suction tube sleeve 10 includes a sleeve pipe and a tapered plug pipe. The sleeve pipe is sleeved outside the suction tube 22. The tapered plug pipe is provided with a powder cavity that communicates with the suction tube 22. The tapered plug pipe is provided with a plurality of powder through holes.

[0050] The outer side of the pressing head 21 is provided with an outer cover 11. The bottom of the outer cover 11 is connected with the outer side of the middle section 5.

[0051] In the specific implementation process, the inner bottle 3 of the present scheme is used to store dry powder and transmit the pressure of the pressing head 21. The user can hold the outer bottle 4 with one hand and press the pressing head 21 with the thumb or the other hand. At this time, the outer bottle 4 and the middle section 5 do not move, and the pressing head 21 drives the inner bottle 3 and the sealing piston 6 to move downward together. After being released, the inner bottle 3 and the pressing head 21 automatically rebound under the action of the reset spring. Continuous pressing of the pressing head 21 can continuously spray dry powder.

[0052] When the pressing head 21 is pressed downward, the inner bottle 3 is driven to move downward. The bottom of the inner bottle 3 pushes the sealing piston 6 and the reset spring to move downward together. The compressed air chamber 7 is reduced in size. The air in the compressed air chamber 7 is squeezed and the pressure increases until the upper one-way valve 8 is opened to enter the inner bottle 2. The dry powder stored in the inner bottle 2 is pressed to enter the outlet passage 24 of the pressing head 21 through the suction tube 22 and is sprayed out. After the pressing head 21 is released, the reset spring drives the sealing piston 6 and the inner bottle 3 to move upward. The volume of the compressed air chamber 7 is expanded and the air pressure is reduced. When the air pressure outside is greater than the air pressure in the compressed air chamber 7, the lower one-way valve 9 is opened to enter the compressed air chamber 7 until the pressure is balanced.

[0053] Venting groove 220 guides a part of the high-pressure air injected in inner bottle 3 into inner insertion pipe 219 to enter outlet channel 24, and the part of high-pressure air guided out can accelerate the speed of dry powder particles and make them collide with each other or with the inner wall of inner insertion pipe 219, etc., so as to break up the dry powder particles and make the dry powder be in powder state when sprayed.

[0054] Upper one-way valve 8 is arranged in the middle of sealing piston 6, and when compressed air enters inner bottle 3 from upper one-way valve 8, the dry powder stored in inner bottle 3 is stirred and dispersed, which can prevent the dry powder from being caked and unable to flow in inner bottle 3, and this is also the function of downward blowing when the air inlet is arranged at the upper part.

[0055] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dry powder nebulizer comprising a reservoir bottle connected to a nebulizing device, characterized in that, The storage bottle comprises an inner bottle and an outer bottle, the inner bottle is arranged in the outer bottle, a middle section is arranged between the outer side of the bottle mouth of the inner bottle and the inner side of the bottle mouth of the outer bottle, the inner bottle and the middle section are movably connected, the middle section and the outer bottle are detachably connected, the bottom of the inner bottle is provided with a sealing piston, a compressed air chamber is arranged between the sealing piston and the inner side of the bottom of the outer bottle, the outer side of the sealing piston is tightly attached to the inner side wall of the bottle body of the outer bottle, the sealing piston is provided with an upper one-way valve allowing air to flow from the compressed air chamber to the inner cavity of the inner bottle, and the bottom of the outer bottle is provided with a lower one-way valve allowing air to enter the compressed air chamber from the outside. The spraying device comprises a pressing head, a suction pipe and a reset device, the bottle mouth of the inner bottle is connected with the pressing head, the pressing head is provided with an outlet channel, the suction pipe is arranged in the inner bottle and connected with one end of the outlet channel and extends to the sealing piston, and the reset device comprises a reset spring arranged in the compressed air chamber, one end of the reset spring is connected with the sealing piston, and the other end is connected with the inner side of the bottom of the outer bottle. When the pressing head is pressed down, the inner bottle is moved downward, the bottom of the inner bottle pushes the sealing piston and the reset spring to move downward, the air in the compressed air chamber is extruded to increase the pressure until the upper one-way valve is opened to enter the inner bottle, and the dry powder stored in the inner bottle is pressed to enter the outlet channel of the pressing head through the suction pipe and is sprayed out, after the pressing head is released, the reset spring drives the sealing piston and the inner bottle to move upward, the compressed air chamber is expanded, the air pressure is reduced, and when the air pressure outside is greater than that in the compressed air chamber, the lower one-way valve is opened to enter the compressed air chamber until the pressure is balanced.

2. A dry powder nebulizer according to claim 1, wherein The pressing head comprises a head, a cap, a cover, a gasket and a coil, the outer side of the bottle mouth of the inner bottle is provided with an external thread, the gasket is tightly attached to the bottle mouth of the inner bottle, the coil is connected with the bottle mouth of the inner bottle through the thread and tightly presses the cover on the gasket, the bottom of the cover is connected with the suction pipe, the top of the cover is connected with the cap, the top of the cap is connected with the middle part of the head, the outer side of the head is provided with a hollow ring and the bottom of the ring is close to the inner bottle, the inside of the head, the cap and the cover forms an outlet channel, one end of the outlet channel is communicated with the suction pipe and the other end is communicated with the outside.

3. A dry powder nebulizer according to claim 2, wherein, The cover comprises a cover body with a cross-section in the shape of a Chinese character, the middle part of the cover body is provided with a through hole, the edge of the through hole extends downward to form an external insertion pipe matched with the suction pipe, the edge of the through hole extends upward to form an internal insertion pipe matched with the cap, the cap is a pipe-shaped body with one end closed, the head is sleeved on the outer side of the cap, the axis of the outlet channel is perpendicular to the axis of the through hole of the cover, the top side of the head is provided with a nozzle, and the outlet channel is communicated with the nozzle, the head, the cap, the internal insertion pipe, the through hole and the suction pipe.

4. A dry powder nebulizer according to claim 2, wherein The bottle mouth of the inner bottle and the bottle body are provided with upper and lower steps connected with each other, the outer side wall of the upper step is provided with an external thread, the coil is connected with the external thread, the outer side wall of the lower step is movably connected with the middle section, the bottom of the ring of the head is arranged between the middle section and the coil, and the ring of the head is rotatably connected with the coil.

5. A dry powder nebulizer according to claim 3, wherein The outer insertion tube is provided with one or more air vent grooves recessed in the tube wall, which are connected with the inner bottle and the inner insertion tube.

6. A dry powder nebulizer according to claim 1, wherein The bottom of the outer bottle is provided with an embedded groove, a bottom cover and a mounting groove recessed in the inner part of the outer bottle, the mounting groove is located in the middle part of the bottom of the outer bottle, the connecting part of the reset spring and the inner side of the bottom of the outer bottle is located outside the mounting groove, the center of the mounting groove is provided with a lower one-way valve, the bottom cover is arranged in the embedded groove, the bottom cover is provided with a plurality of air inlet holes, the bottom of the embedded groove is provided with an air inlet channel connected with the air inlet holes and the lower one-way valve.

7. A dry powder nebulizer according to claim 1, wherein The middle part of the sealing piston is a funnel-shaped body, the bottom of the funnel-shaped body is a funnel tube, the middle part of the funnel tube is provided with an upper one-way valve, the connecting part of the reset spring and the sealing piston is located outside the funnel tube, the top of the funnel-shaped body is provided with a downwardly extending annular flip cover, the middle part of the flip cover is provided with a piston step, the upper part of the piston step is clamped with the inner side wall of the inner bottle, and the lower part of the piston step is tightly sealed with the inner side wall of the outer bottle.

8. A dry powder nebulizer according to claim 1, wherein The end of the suction tube close to the sealing piston is provided with a suction tube sleeve, the suction tube sleeve includes a sleeve pipe and a tapered plug pipe, the sleeve pipe is sleeved outside the suction tube, the tapered plug pipe is provided with a powder cavity connected with the suction tube, and the pipe wall of the tapered plug pipe is provided with a plurality of powder through holes.

9. A dry powder nebulizer according to claim 1, wherein The outer side of the pressing head is provided with an outer cover, and the bottom of the outer cover is connected with the outer side of the middle section.

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