Large-particle-size aerosol atomizer

Abstract

The invention provides a large-particle-size aerosol atomizer which comprises a solution bottle, an aerosol generating chamber is installed on the solution bottle, an aerosol nozzle and an impact ball located in front of the aerosol nozzle are installed in the aerosol generating chamber, a gas inlet nozzle is arranged at one end of the aerosol generating chamber, and an annular gas generating device is arranged at the other end of the aerosol generating chamber. The annular gas generating device comprises a gas inlet end, a contraction cavity and a gas outlet nozzle. The gas inlet end is provided with an annular groove and an annular gas inlet communicated with the annular groove. The aerosol atomizer is small in size, convenient to carry and install, stable in mist spraying, fine and uniform in mist drop and high in atomization efficiency. The aerosol atomizer can be used for generating various aerosols including microorganisms and standard particles with different particle sizes, and standard particle aerosols with the maximum size of 10 microns can be generated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of gas detection equipment, and particularly relates to a large-particle-size aerosol atomizer. BACKGROUND

[0002] An aerosol generator is an instrument device for converting solid or liquid substances into suspended particles by a physical method, and is widely applied to fields such as filter efficiency testing, measurement device calibration, and toxicology research. Existing portable aerosol generators mostly use aerosol nozzles to mix gas and liquid to generate aerosols, and can meet the generation of small-particle-size aerosols. However, when such generators are used to generate large-particle-size standard particles (about 10 um), technical problems such as particle sedimentation or clustering, unstable concentration, and poor monodispersity exist, and the particle size and aerosol concentration of the generated aerosols are difficult to meet the requirements of laboratory instrument use and calibration. SUMMARY

[0003] The present application aims at the technical problems of particle sedimentation or clustering and unstable concentration when existing portable aerosol generators generate large-particle-size standard particles, and proposes an aerosol atomizer which can not only generate stable and high-concentration aerosols, but also generate large-particle-size standard particles according to actual requirements.

[0004] To achieve the above purpose, the technical scheme adopted by the present application is as follows: A large-particle-size aerosol atomizer, comprising a solution bottle, a solution bottle is provided with an aerosol generation chamber, an aerosol nozzle and an impact ball located in front of the aerosol nozzle are installed in the aerosol generation chamber, and a liquid inlet pipe extending into the solution bottle is connected to the aerosol nozzle; an air inlet nozzle is arranged at one end of the aerosol generation chamber, and an annular air generation device is arranged at the other end of the aerosol generation chamber, the annular air generation device comprises an air inlet end, a contraction cavity and an air outlet nozzle, and the air inlet end is provided with an annular groove and an annular air inlet communicating with the annular groove.

[0005] Preferably, the contraction cavity comprises a cylindrical portion and a contraction portion.

[0006] Preferably, the aerosol nozzle is installed at the outlet end of the air inlet nozzle.

[0007] Preferably, the impact ball is connected to the aerosol nozzle through a stainless steel ring.

[0008] Preferably, the impact ball is made of metal.

[0009] Preferably, the lower end of the aerosol generation chamber is inserted into the solution bottle, and a sealing plug is installed between the lower end of the aerosol generation chamber and the solution bottle.

[0010] Preferably, a bottle mouth pressure cap is installed on the solution bottle.

[0011] As preferred, the air inlet nozzle outer wall is provided with a baffle ring, and the air inlet nozzle pressure cap is screwed on the aerosol generating chamber and presses the baffle ring on the aerosol generating chamber.

[0012] As preferred, the annular gas generating device is screwed on the aerosol generating chamber.

[0013] Compared with the prior art, the aerosol atomizer has the advantages and positive effects that: 1、The aerosol atomizer combines jet atomization and impact atomization, and the gas and reagent are ejected through the aerosol nozzle for preliminary atomization, and then impact on the steel ball for further atomization, thereby improving the atomization efficiency and making the droplets small.

[0014] 2、The annular gas generating device is arranged, the annular gas flow can isolate the contact between the aerosol and the pipe wall, reduce the loss of the aerosol on the inner wall of the pipe, and reduce unnecessary particle loss; and the annular gas flow helps to maintain the flow rate of the aerosol, reduce the flow rate reduction and pressure loss caused by resistance, avoid the aggregation or stagnation of the aerosol in some areas, and greatly improve the conveying capacity and quantity of large particle size aerosol.

[0015] 3、The aerosol atomizer adopts a coaxial structure, the aerosol nozzle and the aerosol outlet are coaxial, the aerosol flows out along a straight path, avoids turning and intercepting, and improves the atomization efficiency and uniformity.

[0016] 4、The aerosol atomizer has small volume, is convenient to carry and install, has low requirement on the gas source, stable spraying, small and uniform droplets, and high atomization efficiency. The aerosol atomizer can be used to generate various aerosols, including microorganisms and standard particles of different particle sizes, and can generate standard particle aerosol of 10 microns at most. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the overall structure of the large particle size aerosol atomizer of the application; Figure 2 It is a schematic view of the overall structure of the large particle size aerosol atomizer of the application; Figure 3 It is a schematic view of the overall structure of the large particle size aerosol atomizer of the application; In the above figures: 1, solution bottle; 2, aerosol generating chamber; 3, sealing plug; 4, bottle opening pressure cap; 5, air inlet nozzle; 51, baffle ring; 6, air inlet nozzle pressure cap; 7, annular gas generating device; 71, air inlet end; 72, contraction cavity; 721, cylindrical part; 722, contraction part; 73, air outlet nozzle; 74, annular groove; 75, annular gas inlet; 8, aerosol nozzle; 9, impact ball; 10, liquid inlet pipe; 11, stainless steel ring. DETAILED DESCRIPTION

[0018] To better understand the present invention, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0019] Example: Figure 1 , Figure 2 As shown, a large-particle-size aerosol atomizer includes a solution bottle 1, on which an aerosol generating chamber 2 is installed. The aerosol generating chamber 2 is T-shaped and has a hollow interior. A sealing plug 3 is installed on the mouth of the solution bottle 1, and the lower end of the aerosol generating chamber 2 is inserted into the hole in the middle of the sealing plug 3 to achieve sealing and fixation of the aerosol generating chamber. Furthermore, a bottle mouth pressure cap 4 is screwed onto the mouth of the solution bottle 1, which presses the sealing plug 3 tightly.

[0020] An air inlet 5 and an air inlet cap 6 are installed at one end of an aerosol generating chamber 2, and an annular gas generating device 7 is installed at the other end. An aerosol nozzle 8 and an impact ball 9 located in front of the aerosol nozzle 8 are installed inside the aerosol generating chamber 2. A retaining ring 51 is provided on the outer wall of the air inlet 5. The air inlet cap 6 is screwed onto the aerosol generating chamber 2 by threads, pressing the retaining ring 51 tightly onto the aerosol generating chamber 2, thus fixing the air inlet 5. The aerosol nozzle 8 is installed at the outlet end of the air inlet 5, and the airflow enters the aerosol nozzle 8 through the air inlet 5. A liquid inlet pipe 10 extending into the solution bottle 1 is connected to the aerosol nozzle 8, and the reagent in the solution bottle 1 enters the nozzle through the liquid inlet pipe 10. Figure 3 As shown, the impact ball 9 is connected to the aerosol nozzle 8 via an arc-shaped stainless steel ring 11. The aerosol sprayed from the nozzle impacts the impact ball 9, further breaking it down into finer droplets. The impact ball 9 can be made of metal, ceramic, polytetrafluoroethylene, etc. In this embodiment, a stainless steel ball is used because it is easy to process and manufacture and is durable.

[0021] The annular gas generating device 7 sequentially includes an inlet end 71, a contraction chamber 72, and an outlet nozzle 73. The inlet end 71 is provided with an annular groove 74, and an annular gas inlet 75 connects to the annular groove 74. The open end of the annular groove 74 connects to the contraction chamber 72. The contraction chamber 72 includes a cylindrical part 721 and a contraction part 722. The cylindrical part 721 is connected to the annular groove 74, allowing the annular gas to flow out smoothly. Then, it gradually contracts through the contraction part 722 to the aerosol outlet, allowing the airflow to flow out smoothly. Sheath gas enters the annular groove 74 through the annular gas inlet 75, and then forms an annular airflow that is injected into the contraction chamber 72. The carrier aerosol flows out through the aerosol outlet.

[0022] The aerosol atomizer combines jet atomization and impact atomization, clean gas enters the aerosol nozzle 8 through the air inlet 5, the air inlet 5 and the inside of the aerosol nozzle 8 are variable diameter channels, due to the Venturi effect, the negative pressure generated when the clean gas passes through the small nozzle will suck the reagent in the solution bottle 1 into the aerosol nozzle 8, the gas and the reagent will be ejected through the aerosol nozzle 8, preliminary atomization is carried out, and then impact on the steel ball for further atomization, so as to improve the atomization efficiency and make the mist droplets small. Another clean gas enters the annular groove 74 of the annular gas generating device through the annular gas inlet 75 to form an annular gas flow, and then the aerosol is sprayed out through the aerosol outlet and enters the drying stage. The annular gas flow can isolate the aerosol from the pipe wall, reduce the loss of the aerosol to the inner wall of the pipeline, and reduce unnecessary particle loss; and the annular gas flow helps to maintain the flow rate of the aerosol, reduces the flow rate reduction and pressure loss caused by resistance, avoids the phenomenon of aggregation or stagnation of the aerosol in some areas, and greatly improves the transportation capacity and quantity of large particle size aerosols.

[0023] The aerosol atomizer adopts a coaxial structure, the aerosol nozzle 8 is coaxial with the aerosol outlet, the aerosol flows out along a straight path, avoids turning and intercepting, and improves the atomization efficiency and uniformity.

[0024] The aerosol atomizer has small volume, is convenient to carry and install, has low requirement on the gas source, stable spraying, small and uniform mist droplets, and high atomization efficiency. The aerosol atomizer can be used to generate various aerosols, including microorganisms and standard particles of different particle sizes, and can generate standard particle aerosols of 10 μm at most.

[0025] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments shall still fall within the protection scope of the present application.

Claims

1. A large particle size aerosol atomizer characterized by: The aerosol generating chamber is installed on the solution bottle, and the aerosol nozzle and the impact ball in front of the aerosol nozzle are installed in the aerosol generating chamber. One end of the aerosol generating chamber is provided with an air inlet nozzle, and the other end is provided with an annular gas generating device.

2. The large particle size aerosolizer of claim 1, wherein: The annular gas generating device includes an air inlet end, a contraction cavity, and an air outlet nozzle.

3. The large particle size aerosolizer of claim 1, wherein: The contraction cavity includes a cylindrical part and a contraction part.

4. The large particle size aerosolizer of claim 1, wherein: The aerosol nozzle is installed at the outlet end of the air inlet nozzle.

5. The large particle size aerosolizer of claim 1, wherein: The impact ball is connected to the aerosol nozzle through a stainless steel ring.

6. The large particle size aerosolizer of claim 1, wherein: The impact ball is made of metal.

7. The large particle size aerosolizer of claim 1, wherein: The lower end of the aerosol generating chamber is inserted into the solution bottle, and a sealing plug is installed between the lower end of the aerosol generating chamber and the solution bottle.

8. The large particle size aerosolizer of claim 1, wherein: A bottle opening pressure cap is installed on the solution bottle.

9. The large particle size aerosolizer of claim 1, wherein: The air inlet nozzle is provided with a retaining ring, and the air inlet nozzle pressure cap is screwed onto the aerosol generating chamber and presses the retaining ring tightly on the aerosol generating chamber. The annular gas generating device is screwed onto the aerosol generating chamber.

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